Download SMV/SMP/SMPQ Instruments Operating Manual

KMB systems, s.r.o.
Dr. M. Horákové 559, 460 06 Liberec 7, Czech Republic
tel. +420 485 130 314, fax +420 482 736 896
email : [email protected], internet : www.kmb.cz
SMV, SMP
SMVQ, SMPQ
Multifunctional Panel Meters &
Power Quality Analyzers
Operating Manual
Firmware v. 1.0.0.3035
10 / 2013
SMV / SMP / SMVQ / SMPQ
LIST OF CONTENTS
1. GENERAL...........................................................................5
1.1 Common features....................................................................................................................................... 5
2. BRIEF DESCRIPTION........................................................7
2.1 Instrument Connection.............................................................................................................................. 7
2.2 SMV / SMVQ Instrument Setup................................................................................................................. 8
2.2.1 Locking and Unlocking of the Instrument..............................................................................................9
2.3 SMV / SMVQ Instrument Operation......................................................................................................... 10
2.4 SMP / SMPQ Instrument Setup............................................................................................................... 13
2.4.1 The Instrument Lock........................................................................................................................... 14
2.4.1.1 Locking........................................................................................................................................ 14
2.4.1.2 Unlocking from the User Locked State........................................................................................14
2.4.1.3 Unlocking from the Admin Locked State......................................................................................14
2.5 SMP / SMPQ Instrument Operation......................................................................................................... 14
3. DETAILED DESCRIPTION...............................................16
3.1 Basic Characteristics............................................................................................................................... 16
3.2 Manufactured Models and Marking........................................................................................................ 18
3.3 Installation................................................................................................................................................ 21
3.3.1 Physical.............................................................................................................................................. 21
3.3.2 Protective Conductor Connection....................................................................................................... 21
3.3.3 Supply Voltage Connection................................................................................................................. 21
3.3.4 Measured Electrical Quantities Connection........................................................................................21
3.3.4.1 Measured Voltages...................................................................................................................... 21
3.3.4.2 Measured Currents...................................................................................................................... 22
3.3.4.2.1 Standard „X/5A”-Option Instruments – Current Signals Connection.....................................22
3.3.4.2.2 „F“-Option Instruments – Current Signals Connection........................................................22
3.3.4.2.3 „S“- and „P“- Option Instruments – Current Signals Connection.........................................23
3.3.5 Connection Setting.............................................................................................................................. 24
3.3.5.1 Connection Mode, Type and VT/CT Ratios.................................................................................24
3.3.5.2 Nominal Voltage UNOM and Nominal Power PNOM..................................................................24
3.4 Instrument Manual Manipulation and Setting........................................................................................25
3.4.1 SMV/SMVQ Instrument Manipulation and Setting...............................................................................25
3.4.2 SMP/SMPQ Instrument Manipulation and Setting...............................................................................25
3.4.2.1 Data Area – Status Bar - Toolbar................................................................................................ 25
3.4.2.2 Main Menu................................................................................................................................... 26
3.4.2.3 Actual Data Group....................................................................................................................... 26
3.4.2.4 Daily and Weekly Graphs............................................................................................................ 27
3.4.2.5 Electricity Meter Data Group........................................................................................................ 28
3.4.2.6 Power Quality Data Group........................................................................................................... 28
3.4.2.7 Instrument Setting....................................................................................................................... 28
3.4.2.7.1 Display Setting..................................................................................................................... 28
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SMV / SMP / SMVQ / SMPQ
3.4.2.7.2 Installation Setting................................................................................................................ 28
3.4.2.7.3 Clock Setting........................................................................................................................ 28
3.4.2.7.4 Average Values Processing Setting....................................................................................29
3.4.2.7.5 I/O Setting........................................................................................................................... 29
3.4.2.7.6 Remote Communication Setting........................................................................................... 29
3.4.2.7.7 Embedded Electricity Meter Setting....................................................................................30
3.4.2.7.8 Archiving Setting................................................................................................................. 30
3.4.2.7.9 Power Quality Evaluation Setting........................................................................................30
3.4.2.8 Instrument Lock........................................................................................................................... 31
3.4.2.9 Instrument Information................................................................................................................. 31
3.4.2.9.1 Info – General Window........................................................................................................ 31
3.4.2.9.2 Info – Archive Status........................................................................................................... 31
3.4.2.9.3 Info – Producer.................................................................................................................... 32
3.5 Description of Operation......................................................................................................................... 32
3.5.1 Method of Measurement..................................................................................................................... 32
3.5.1.1 Voltage Fundamental Frequency Measurement Method.............................................................32
3.5.1.2 Voltage and Current Measurement Method.................................................................................32
3.5.1.3 Power and Power Factor Evaluation Method...............................................................................33
3.5.1.4 Fundamental Harmonic Power, Power Factor and Unbalance Evaluation Method......................34
3.5.1.5 Voltage Events Evaluation Method.............................................................................................. 35
3.5.1.6 Harmonics, Interharmonics and THD Evaluation Method............................................................36
3.5.1.7 Flicker Evaluation Method........................................................................................................... 36
3.5.1.8 Ripple Control Signal (RCS) Evaluation Method.........................................................................36
3.5.2 Measured Values Evaluation and Aggregation...................................................................................36
3.5.2.1 Display Actual Values Evaluation and Aggregation.....................................................................36
3.5.2.2 Average Values Evaluation.......................................................................................................... 37
3.5.2.2.1 Maximum and Minimum Average Values............................................................................38
3.5.2.3 Recorded Values Aggregation..................................................................................................... 39
3.5.3 Harmonics, Interharmonics and THD.................................................................................................. 39
3.5.3.1 Harmonics, Interharmonics and THD Aggregation......................................................................39
3.5.3.2 Harmonics and THD Presentation............................................................................................... 39
3.5.4 Embedded Electricity Meter................................................................................................................ 40
3.5.4.1 Electric Energy Processing.......................................................................................................... 40
3.5.4.2 Maximum Active Power Demand Registration.............................................................................40
3.5.4.3 Setting......................................................................................................................................... 40
3.5.4.4 SMV/SMVQ Instrument Energy Presentation..............................................................................41
3.5.4.5 SMV /SMVQ Instrument Maximum Active Power Demand Presentation.....................................41
3.5.4.6 SMP/SMPQ Instrument Energy Presentation..............................................................................42
3.5.4.7 SMP/SMPQ Instruments Maximum Active Power Demand Presentation....................................42
3.5.5 Power Quality..................................................................................................................................... 43
3.5.5.1 Power Quality Evaluation............................................................................................................. 43
3.5.5.2 Power Quality Presentation......................................................................................................... 43
3.5.6 Record Blocking.................................................................................................................................. 44
3.6 Inputs & Outputs..................................................................................................................................... 45
3.6.1 Inputs & Outputs Connection.............................................................................................................. 45
3.6.1.1 Relay Output Connection............................................................................................................. 46
3.6.1.2 Impulse Output Connection......................................................................................................... 46
3.6.1.3 Digital Input Connection............................................................................................................... 46
3.6.1.4 Analog Input Connection............................................................................................................. 46
3.6.2 Inputs & Outputs Setup....................................................................................................................... 46
3.6.2.1 Digital Output Setup – Standard Output......................................................................................46
3.6.2.1.1 Input Events........................................................................................................................ 46
3.6.2.1.2 Control Quantity Size Event................................................................................................ 47
3.6.2.1.3 Instrument State Event........................................................................................................ 49
3.6.2.1.4 Permanent State Event....................................................................................................... 50
3.6.2.1.5 Output Control Formula....................................................................................................... 50
3.6.2.1.6 Output Type........................................................................................................................ 50
3
SMV / SMP / SMVQ / SMPQ
3.6.2.2
3.6.2.3
3.6.2.4
3.6.2.5
3.6.2.6
Digital Output Setup - Impulse Output......................................................................................... 50
Digital Output Setup – Remote Controlled Output.......................................................................51
Digital Input Setup....................................................................................................................... 51
Analog Input (A) Setup................................................................................................................ 51
Temperature Input (T) Setup....................................................................................................... 51
3.7 Additional Firmware Modules................................................................................................................ 51
3.7.1 VE Module - Voltage Events............................................................................................................... 52
3.7.1.1 PQ-Voltage Events Evaluation..................................................................................................... 52
3.7.1.2 PQ-Voltage Events Presentation................................................................................................. 53
3.7.2 RCS Module – Ripple Control Signal.................................................................................................. 53
3.7.2.1 RCS Evaluation........................................................................................................................... 53
3.7.2.2 RCS Processing Setting.............................................................................................................. 54
3.7.2.3 RCS Signal and RCS Telegram Visualization.............................................................................54
3.7.2.4 RCS Telegram Reception Indication with the A1/A2 LEDs..........................................................55
3.7.2.5 RCS Signal and Telegram Viewing in the ENVIS Program..........................................................56
3.7.3 GO Module – General Oscillograms................................................................................................... 56
3.8 Transient Recording............................................................................................................................... 56
3.8.1 PQ-Event Trends and PQ-Oscillograms............................................................................................. 57
3.8.2 PQ-General Oscillograms................................................................................................................... 57
3.8.3 Event Trend and Oscillogram Triggering............................................................................................ 58
3.8.3.1 General Triggering....................................................................................................................... 58
3.8.3.2 Wave Change Triggering............................................................................................................. 58
3.8.3.3 PQ-General Oscillogram Record Triggering Methods.................................................................58
4. COMPUTER CONTROLLED OPERATION......................60
4.1 Communication Links.............................................................................................................................. 60
4.1.1 Local Communication Link.................................................................................................................. 60
4.1.2 Remote Communication Link.............................................................................................................. 60
4.1.2.1 RS-232 Interface......................................................................................................................... 60
4.1.2.2 RS-485 Interface......................................................................................................................... 60
4.1.2.2.1 Communication Cable......................................................................................................... 61
4.1.2.2.2 Terminating Resistors......................................................................................................... 61
4.1.2.3 Ethernet (IEEE802.3) Interface.................................................................................................... 61
4.1.2.4 Communication Protocols............................................................................................................ 61
4.1.2.4.1 KMB Communications Protocol........................................................................................... 61
4.1.2.4.2 Modbus-RTU Communications Protocol.............................................................................61
4.2 The ENVIS Program................................................................................................................................. 61
4.3 Embedded Webserver.............................................................................................................................. 63
5. EXAMPLES OF CONNECTIONS.....................................64
6. TECHNICAL SPECIFICATIONS.......................................70
7. MAINTENANCE, SERVICE..............................................78
4
SMV / SMP / SMVQ / SMPQ
1. General
This manual comprises description of SMV, SMP, SMVQ and SMPQ multifunctional panel meters and
power quality analyzers. All the instrument models share the same measuring & evaluating engine a
their characteristics are as follows :
•
SMV – basic model with LED display
•
SMP – same parameters and options as SMV, but with high resolution LCD display and
enhanced display capabilities, including day/week graphs, waveforms, phasors,harmonic
charts, status informations etc.
•
SMVQ, SMPQ – the enhanced model with improved precision of current, power and energy
measurement, inter-harmonics and flicker severity indexes, voltage events and weekly
evaluation of power quality (EN 50160)
1.1 Common features
Standard Measurement Principles
• evaluation of electrical parameters in energy distribution systems in compliance with IEC
61000-4-30 ed. 2 class S
• four voltage inputs ( U1, U2, U3, UN )
• three ( I1, I2, I3 ; “33”-models ) or four ( I1, I2, I3, IN ; “44”-models ) current inputs
• measuring of electric quantities in three phase (from three- to five-wire) networks of nominal
voltage up to 400V AC (or up to 130 V AC for ”100”-models) directly, or via voltage
transformers
• current signal connection :
•
standard „X/5A“ option models … 5A and 1A nominal current inputs
•
„F“ option models … B3000/1000-line flexible Rogowski current sensors inputs
•
„S“ option models … JC-line miniature split core current transformers input
•
„P“ option models … JP-line miniature through-hole current transformers input
• sampling rate 128 / 96 samples/period, 10 / 12 periods continuous measurement cycle ( ~200
ms at 50 / 60 Hz ), gap-less
• selection of aggregation intervals from 200 ms/1 second up to 24 hours
• data flagging concept that eliminates double evaluation of critical events
• fixed window / floating window / thermal average values
• harmonic components up to 63rd according to IEC 61000-4-7 ed.2
• interharmonic components ( SMVQ/SMPQ only )
• digital flicker meter according IEC 61000-4-15 ( SMVQ/SMPQ only )
5
SMV / SMP / SMVQ / SMPQ
Electricity Meter
•
•
•
•
four-quadrant three tariff electricity meter
single phase and three phase energies
maximum of average active power values ( power demand ) of current / last month and total
automated electricity meter readings at preselected time intervals
Advanced Datalogging Capabilities
• high memory capacity for recording of aggregated measurement values
• maximum and minimum average values including timestamps
• day profiles (detailed day long record) at preselected date and at the day with maximum
demand
• optional voltage events evaluation and record ( firmware module VE; standard at the
SMVQ/SMPQ ), ripple control signal measurement ( RCS module ) and voltage event
oscillogram record ( GO module )
Fully Configurable Inputs and Outputs for Control
•
•
•
•
two configurable alarm LEDs on the front side panel
two optional configurable relays or pulse outputs
optional single digital input for time synchronization, tariff selection or for status monitoring
optional universal analog input ( passive current loop 20 mA ) or the Pt100 temperature
sensor input
Communication Options / Data Acquisition
• built-in USB 2.0 communication port for fast data acquisition, configuration and firmware
upgrades
• proprietary protocol with free data acquisition software ENVIS
• optional remote communication interface ( RS 232 / RS 485 / Ethernet )
• MODBUS RTU and MODBUS TCP for simple integration with third party SCADA software
• embedded webserver ( for instruments with Ethernet interface )
• optional accessories :
• RS232/RS485 and USB/RS485 interface converters
• external GPS real time receiver for time synchronization via remote comm. Interface
6
SMV / SMP / SMVQ / SMPQ
2. Brief Description
This chapter provides a brief description of connection and basic operation of the instruments in a
typical installation. A detailed instrument description of all its features and connection possibilities
follows.
2.1 Instrument Connection
The instruments of the SMV / SMP / SMVQ / SMPQ series belong to equipment class I, therefore it is
absolutely necessary to connect the PE protective conductor to the PE terminal of the
instrument ! The recommended cross section of the protective conductor is 2,5 ÷ 4,0 mm 2, loop with
diameter of 4,3 mm ( M4 terminal ).
It is necessary to connect an auxiliary supply voltage in the range as declared in technical
specifications table to the terminals AV1 ( L ) and AV2 ( N ). In case of DC supply voltage the polarity
of connection is generally free, but for maximum electromagnetic compatibility the grounded pole
should be connected to the terminal AV2.
The supply voltage must be connected via a disconnecting device ( switch - see installation diagram ).
It must be situated directly at the instrument and must be easily accessible by the operator. The
disconnecting device must be labelled as the disconnecting device of the equipment. A circuit breaker
at the nominal value of 1A may be used for the disconnecting device; however its function and
position must be clearly marked (symbols „O" and „I" according to EN 61010 - 1).
Fig. 2.1: Typical star (4Y) connection, mains 3 x 230/400 V
Measured phase-to-neutral voltages and neutral voltage (measured towards to the PE ) connect to
terminals VOLTAGE / N, U1, U2 and U3. Measured voltages must be protected, e.g. by 1A fuse.
Current signals from the current transformers at the nominal value of 5 or 1 A AC must be connected
to a pair of terminals CURRENT / I1k, I1l, I2k, I2l, I3k, I3l, or INk, INl. It is necessary to observe their
polarity (terminals k, l). Examples of other connections are mentioned below in the manual.
The maximum cross section of the conductors to the terminal panels is 2,5 mm2.
7
SMV / SMP / SMVQ / SMPQ
2.2 SMV / SMVQ Instrument Setup
When switching on the power supply, the instrument will perform a display test and then will display
the code „ Init", firmware release number and a group of measured values, e.g. phase voltages U1, U2,
U3 (or UN). The information is shown on the display as follows, for example:
SMV 44
SMV 44
VLL
VLN
A
W
var
inIt
k
inst.
VLL
avg
VLN
max
.
A
…..
min
M
W
time
var
VA
VA
PF
PF
cos
cos
THD
har
m
En1
p
En3
p
Pav
g
231
229
230
inst.
avg
max
.
k
min
M
time
THD
1780
0.0
har
m
En1
p
En3
p
k
M
Pav
USB
Hz, i
k
M
USB
Hz, i
In this case the LED- diode VLN indicates the type of displayed quantities, i.e. phase voltages. The
instantaneous measured values in phases L1, L2 and L3 can be viewed in the first three rows. In the
fourth row the value of voltage UN is displayed.
To display the real values of voltages, currents and other quantities, the instrument must be preset.
Setup of the instrument is stated by specifications, such as for example the type of measured voltage
[direct measuring or via metering voltage transformers (VT) and their conversions], the method of
voltage and current connection (star, delta, Aron ), or the conversion metering current transformers
(CT) etc. The summary of the basic parameters is stated in the table below.
Generally, besides nominal frequency ( fNOM , parameter P.03/3) it is only necessary to adjust the CT
conversion. Assuming that the conversion of used CT for inputs of current L1 to L3 is 750/5 A. To edit
the parameters, enter by pressing and holding the ► button (about 6 s). The display will show the
parameter P.00 (=lock). Another (short) touch of the ► button will switch to the group of parameters
P.01, with conversions of the current transformers. A flashing specification in the 2nd row designates
the actual selected parameter, which is the nominal secondary current of the CT. To keep the value of
5A, press ► and switch over to the next parameter in the third row. For example value 500 will start
flashing, which is the preset nominal primary current of the CT. This value can be gradually increased
by touches of the ▲button to 750 A.
SMV 44
VLL
VLN
A
W
►
long
var
P.00
0
SMV 44
k
inst.
VLL
avg
VLN
max
.
A
min
M
time
►
var
VA
VA
PF
PF
cos
cos
THD
Pav
har
m
En1
p
En3
p
k
M
Pav
USB
Hz, i
VLN
A
W
var
VA
PF
cos
Pav
Hz, i
VLN
max
.
A
min
M
time
►
P.01
5
600
k
500
USB
inst.
VLL
avg
VLN
max
.
A
min
M
time
▲
W
var
VA
PF
cos
M
har
m
En1
p
En3
p
Pav
var
PF
cos
P.01
5
500
inst.
avg
k
max
.
min
M
time
THD
500
har
m
En1
p
En3
p
k
M
Pav
USB
500
k
M
USB
Hz, i
SMV 44
P.01
5
750
k
inst.
VLL
avg
VLN
max
.
min
M
time
►
long
A
W
var
VA
PF
cos
229
230
228
inst.
avg
k
max
.
min
M
time
THD
THD
k
W
VA
SMV 44
THD
har
m
En1
p
En3
p
VLL
avg
Hz, i
SMV 44
VLL
k
inst.
THD
har
m
En1
p
En3
p
▲
W
SMV 44
P.01
5
500
500
USB
k
M
har
m
En1
p
En3
p
Pav
0.0
k
M
USB
Hz, i
Hz, i
Finally, to finish editing the parameters, press and hold the ► button again for about 6 sec. and the
instrument will get back to the display of measured values.
8
SMV / SMP / SMVQ / SMPQ
Other basic parameters can be edited in a similar way. Apart from these basic parameters (see
Tab.2.1) the instrument also includes a row of other parameters – their description is stated in
following chapters.
Tab.2.1: SMV - Summary of the basic parameters
Par. Row
P.00
P.01
2
2
3
4
P.03
P.04
P.05
P.06
P.07
P.08
P.09
P.20
*)
P.20
+)
Range of adjustment
Default
setting
0(unlocked) / 1(locked)
1A/5A
1 ÷ 9900 A
1 ÷ 9900 A
3
4
2
3
2
3
4
2
3
4
2
3
4
2
3
2
3
4
2
3
4
2
3
4
2
lock
nom . value of secondary CT
nom . val. primary CT for I1 ÷ I3
nom . val. primary CT for IN
method of voltage connection – directly
or via VT
nom. val. of primary VT for U1 ÷ U3
nom. val. of primary VT for UN
type of connection of U and I
nominal frequency fNOM
display refresh cycle (in mains cycles )
resolution of displayed values
display brightness
U / I averaging method
U / I averaging period
U / I average autoclear period
P / Q / S averaging method
P / Q / S averaging period
P / Q/ S average autoclear period
PavgE (el. meter group) aver. method
PavgE (el. meter group) averaging period
time zone shift
daylight saving
time synchronization
local time – DD.MM
local time – YYYY
local time – HH.MM
remote communication rate
remote communication address
remote communication protocol
remote comm. – IP address
4.8 ÷ 215 kBd
1 ÷ 252
0 / 1-n / 1-O / 1-E / TS
xxx.xxx.xxx.xxx
9,6
1
0
10.0.0.1
3
remote comm. - subnet mask
xxx.xxx.xxx.xxx
255.255.
255.0
2
P.02
Description
- - - / 100
0
5
5
5
---
0.1 ÷ 400 kV
--0.1 ÷ 400 kV
--3- Y / 3- D / 4-Y
3-Y
50 / 60 Hz
50
20 ÷ 200 mains cycles
30
3 / 4 significant figures
4
0÷3
3
FIxed / FLoating / THermal
FL
1 sec ÷ 60 mins
1 min
NO / 1Day / 7Days / 1Month / 1Year
NO
FIxed / FLoating / THermal
FL
1 sec ÷ 60 mins
15 mins
NO / 1Day / 7Days / 1Month / 1Year
NO
Fixed / Floating
FL
1 min ÷ 60 mins
15 mins
-12 ÷ 13 hours
1
NO / YES
YES
NO / mains Freq. / Comm.link / PPM
NO
4 remote comm. - default gateway
xxx.xxx.xxx.xxx
2 remote comm. - KMB-port
0 ÷ 65535
P.21
3 remote comm. - web-port
0 ÷ 65535
+)
4 remote comm. - Modbus-port
0 ÷ 65535
*)... for instruments with RS232 / RS485 remote comm. interface only
+)... for instruments with Ethernet remote comm. interface only
10.0.0.138
2101
80
502
2.2.1 Locking and Unlocking of the Instrument
The instruments are supplied in an „unlocked" state (parameter P.00 = 0), that means the basic
parameters can be randomly edited, following the procedure mentioned above. After putting it into
operation, the parameters editing can be „locked" and the instrument can be protected from possible
9
SMV / SMP / SMVQ / SMPQ
unqualified manipulation, by simply switching the parameter P.00 to the position 1(=locked).
Unlocking the instrument requires this particular procedure: following the above - mentioned method,
switch the instrument into the parameters display and by pressing the ▲ and ▼buttons find the
parameter P.00 – value 1 in the second row indicates the locked instrument. At the same time press
the ▲and ▼buttons - randomly selected number will appear in the third row. If it is odd, press ▲ and
if even, press ▼. Repeat this procedure until the parameter value in the 2nd row switches to the value
0, i.e. the „unlock" status. After that, any parameter can be found and adjusted.
2.3 SMV / SMVQ Instrument Operation
After activation of supply voltage, the instrument accomplishes internal diagnostics, updating of
internal database of measured data and then it starts to measure and display the instantaneous
measured values ( inst. ).
The row of LED-diodes on the left side indicate the type of displayed quantities - their summary is
stated in the chart below. The LED diodes k and M determine a multiplier (k=kilo, M=mega, kM=giga)
separately for specifications in rows 1÷3 and extra for row 4 (e.g. when displaying voltage, the diode k
indicates, that the specifications are in kV etc.).
Particular measured quantities can be changed over by using the ▲and ▼buttons. The buttons
►and ◄ can switch the type of displayed quantity: instant (inst.), average (avg.), maximum of
average (max.) or minimum of average (min.), except the quantities THD,harm and EN – these only
show instantaneous values.
Values avg. are evaluated with method and the time window according to parameters P.05 ( for U/Igroup ), P.06 ( for P/Q/S-group ), and P.07 (for PavgE of electricity meter group). Values max./min. are
maximum/mimimum values of the avg.-values reached since last clearing. You can check date & time
of last clearing of each group by listing to window time, which is indicated as Clrt in the 4th row. To
clear max./min. registered values of appropriate group manually, while in the appropriate Clrt -time
window press the ►and ◄ simultaneously and the date/time value starts flashing. Then confirm
clearing with the button ▼( pressing of different button will not clear anything ). Depending on the
listed average values group, only either U/I-group or P/Q/S-group average max/mins or PavgmaxE of
electricity meter group are cleared. If the instrument is locked, clearing is not possible.
In addition, the buttons ►and ◄ can display conditions of the
SMV 44
internal time circuit ( local time ) and immediate conditions of digital
I-0
inputs/outputs and so-called error code ( I/O,Err ).
O1-0
At the I/O,Err.-window actual status of a digital input ( 1st row ) and
02-1
two digital outputs (2nd and 3rd row) are displayed. Active state
(closed) is indicated as “1”, inactive (open) as “0”.
E 00
At the 4th row the instrument error code is displayed. The E-00 code
means no errors. Other codes can indicate some instrument's
hardware problem – in such case contact the service organization.
The last two LEDs are alarm LEDs A1 and A2. Their function is programmable in the same way as
digital outputs.
VLL
inst.
VLN
avg.
A
k
W
M
max.
.
min
min.
var
time
VA
I/O, min
Err.
PF
cos
A1
THD
A2
harm
k
En1p
M
En3p
PavgE
USB
Hz, i
Other comments on measured quantities:
•VLL, VLN, A : line voltage, phase voltage and phase current real effective values (TRMS). When the
measurement input is overloaded, the whole specification flashes.
•W, Var, VA : supply of active power or leading reactive power indicated as negative.
•PF : actual power factor (or total - T.P.F., λ lambda).
•cos : power factor of the fundamental component. Displayed in four quadrants. Capacitance
character of the power factor indicated by the letter „c"; furthermore, supply of active power
indicated as negative.
10
SMV / SMP / SMVQ / SMPQ
•THD, harm : harmonic distortion (THD) and sizes of individual harmonic components of phase
voltages and currents. The evaluation is executed internally up to the 50th order, but the harmonics
up to 40th order only are displayed. The data is in percentage, except current harmonic data directly
in amperes. The order will display for 1sec after the selection by ►and ◄.
•En1p : Single-phase electrical energy. It is evaluated in four quadrants, i.e. separately - consumption
and supply of active energy and inductive and capacitive component of reactive energy. The data
are summary for all the tariff zones. The reset date & time are stated in the last window.
•En3p : Three - phase electrical energy. Again, it is evaluated in four quadrants, and in addition in
three preset tariff zones including a summary for all the zones ( setup of the tariff zones can be
implemented only by using connection with PC and control program ENVIS). Data displayed to 12
places across rows 1 ÷ 3. The last window again shows the reset date & time ( this specification is
equivalent to corresponding specification of En1p ). The energy counter reset ( common to En1p
and En3p ) is executed when „time" is displayed, by simultaneously pressing ►and ◄ and the
confirmation button ▼- pressing different buttons will not reset the counters. If the instrument is
locked, resetting is not possible.
•PavgE : active power demands ( = average active powers ) of “electricity meter group” (evaluated
independently of standard average values) , single-phase and three-phase values. The
instantaneous value (inst.) evaluated as the average with preset method and over preset period
( parameters P.07 ). The maximum achieved values of these power demands can be displayed in
the window „max." and occurrence date & time of the three-phase power demand in the third window
„max"+ „time". The last window shows the date & time of resetting the maximim value PavgmaxE
( window „time" with a Clrt indication in the 4th row ). The PavgmaxE can be reset manually in the way
already described above.
•Hz, a.i. : the mains frequency ( 2nd row ) is evaluated, if the voltage is present at least on one phase.
If the voltage is not connected or the frequency is out of measurable range, the diode flashes.
In the 4th row, analog input value is displayed. Either 20mA curent loop input value (recalculated to
preset range) or Pt100 temperature sensor input in °C.
Resolution of values displayed can be set to 3 or 4 significant figures ( parameter P.04 / 3 ). In case of
4 negative polarity is indicated by a flashing decimal point of the data.
11
SMV / SMP / SMVQ / SMPQ
Fig. 2.2: SMV – Measured Data Navigation Chart
▼▲
● VLL
U12
U23
U31
● VLN
line-to-line voltages [V]
u2
● THD
voltage unbalance [%]
THDU1
THDU2
THDU3
T HDUN
▼▲
● VLN
U1
U2
U3
▼▲
●A
phase voltages [V]
● THD
UN
THDI1
THDI2
THDI3
●A
▼▲
● VLN
phase currents [A]
● harm
IN
hU1-1
hU2-1
hU3-1
●W
●A
● harm
active 3-phase power [W]
Q1
Q2
Q3
● En1p
reactive 3-phase power [var]
3-phase energy [Wh, varh]
3S
apparent 3-phase power [VA]
I – t1
phase PF [-]
Pavg1
Pavg2
Pavg3
● En3p
3En - I
◄►
▼▲
● PavgE
3-phase PF [-]
phase active power demands [W]
◄►
3-phase active power demand [W]
3Pavg
▼▲
● cos
◄►
▼▲
apparent phase powers [VA]
3PF
1-phase energy [Wh, varh]
I
▼▲
● PF
hIN-50
En1 - I
En2 - I
En3 - I
S1
S2
S3
PF1
PF2
PF3
◄ ►
hIN-1
▼▲
● VA
harmonic
components of
phase currents [A]
order 1÷ 50
hI1-50
hI2-50
hI3-50
▼▲
reactive phase powers [var]
3Q
hUN-50
hI1-1
hI2-1
hI3-1
▼▲
● var
harmonic
components of
phase voltages [%]
order 1÷ 50
hU1-50
hU2-50
hU3-50
▼▲
active phase powers [W]
3P
◄ ►
hUN-1
▼▲
P1
P2
P3
THD of phase currents [%]
THDIN
▼▲
I1
I2
I3
THD of phase voltages [%]
▼▲
cos1
cos2
cos3
phase cos [-]
3cos
3-phase cos [-]
Fr
frequency [Hz]
analog
analog input / temp. [°C]
● Hz, a.i.
▼▲
◄►
◄►
◄►
En1 - E
En2 - E
En3 - E
En1 - L
En2 - L
En3 - L
En1- C
En2- C
En3- C
E
L
C
◄►
◄►
3En - I
3En - I
I – t2
I – t3
I–sum
◄►
3Pavgm
day
year
HH.MM
◄►
3En - I
Pavgm1
Pavgm2
Pavgm3
◄►
Clrt
resetting time
and date in
the last
window (Clrt)
1-phase energy in 4
quadrants: active import (I) and export (E),
reactive – import (L) and
export (C)
3-phase energy (data
across 3 rows)
4 quadrants (I,E,L,C),
each in tariff 1÷3 and sum
(S)
◄►
day
year
HH.MM
day
year
HH.MM
Clrt
single-phase and 3-phase active power demands –
instantaneous (continuous) and maximum attained ;
in third window, occurrence date & time of maximum
3-phase active power demand ;
resetting date & time in the last window (Clrt)
12
SMV / SMP / SMVQ / SMPQ
2.4 SMP / SMPQ Instrument Setup
When switching on the power supply, the instrument will display manufacturer's logo for approx. 0.5
sec and after that usually a group of actual measured values, e.g. phase voltages U1, U2, U3 (or UN), is
displayed. The information is shown on the display as follows, for example:
Quantities' names, i.e. U1, U2 and U3 indicates that actual phase voltages in phases L1, L2 and L3 are
displayed.
To display the real values of voltages, currents and other quantities, the instrument must be preset.
Setup of the instrument is stated by specifications, such as for example type of measured voltage
[direct measuring or via metering voltage transformers (VT) and their ratios], method of voltage and
current connection (star, delta, Aron ), or metering current transformers's (CT) ratios etc.
Besides nominal frequency ( fNOM ), usually it is only necessary to adjust the CT conversion. Assuming
that the conversion of used CT for inputs of current L1 to L3 is 750/5 A. To edit the parameters, press
the MENU button, navigate to the Menu-Setting with the buttons ►and ◄ and then choose it with
the button. In the Setting window choose Setting-Installation option. The Setting-Installation
window appears :
In the window navigate down to the current transformer ratio parameter of inputs I1÷ I3 ( CT ) and
choose with the button.
Now you can type new value of the parameter : with the ►button you can move from a digit to
another one and to set each digit to target value using the ▲and ▼buttons. At the end press the
button and the parameter is set. You can set nominal frequency fNOM and other parameters in the
same way.
Finally, when escaping the window you must confirm new setting by pressing the button and all of
the parameters of the window are stored into the instrument's memory.
The instrument includes a row of other parameters – their description is stated in following chapters.
13
SMV / SMP / SMVQ / SMPQ
2.4.1 The Instrument Lock
Three levels of locking to allow protection against unauthorized access are implemented. The active
protection level is symbolized in the main menu by three different states of the Lock icon :
● Unlocked – anyone with physical access to the instrument can freely set-up and
configure all parameters in the instrument, clear archives and other persistent data
or reset counters. In this state anyone can also lock the instrument.
● User Locked – fixed user password (PIN) is required if the instrument
configuration is changed or there is a request to clear any of the data.
● Admin Locked – user defined admin password (PIN) is required if the instrument
configuration is changed or there is a request to clear any of the data.
2.4.1.1 Locking
If the instrument is unlocked, you can lock it to either user or admin mode.
To lock the instrument into the user locked mode, simply switch in the Menu-Lock window the lock
from  to . Then escape from the window with the  button and confirm saving of changed state.
To lock the instrument into the admin locked state, press the buttons  and ▼ simultaneously in the
Menu -> Lock window. Then normally hidden admin password option
appears. Choose it and type the new admin password code – the value
must be different from 0000. Then escape from the Menu-Lock window
with the  button and confirm saving of changed state. The admin
locked state is indicated with the “A”-character inside the lock icon.
Warning ! Store the admin password code at the secure place to be
able to unlock the instrument later in case the code is forgotten !
2.4.1.2 Unlocking from the User Locked State
To unlock the instrument, switch in Menu -> Lock the lock state back from  to  by entering
user password. The value of this password is fixed and equal to the last four digits of the serial
number of the instrument. This serial number can be found in device display under Menu -> Info ->
Serial number .
Then escape from the Lock window with the  button and confirm saving of changed state.
2.4.1.3 Unlocking from the Admin Locked State
To unlock the instrument, switch in Menu -> Lock the lock state back from  to  by entering
correct admin password. Then escape from the Menu-Lock window with the  button and confirm
saving of changed state.
Note, that such unlocking is temporary and the instrument will switch to the admin locked state
automatically approx. 15 minutes after last pressing of any button. To avoid this you need to set the
admin password code to value 0000 ( in the same way as the locking as described above ). Only after
that the instrument state changes to permanently unlocked state.
Note : In case the admin password is lost, visits manufacturer's website at www.kmbsystems.eu and
follow instructions to obtain the alternate unlock code.
2.5 SMP / SMPQ Instrument Operation
After an activation of supply voltage, the instrument accomplishes internal diagnostics, updating of
internal database of measured data and then it starts to measure and display actual measured data.
Navigation through all measured data is intuitive with arrow keys. Layout of screens can be found at
following figure.
Two alarm LEDs A1 and A2 function is programmable in the same way as digital outputs.
14
SMV / SMP / SMVQ / SMPQ
Fig. 2.3: SMP – Actual Data Navigation Chart
Main
Menu
Actual Values Branch
● ULL, unb, Pst / Plt
Graphs
● ULN
Electricity
Meter
Power
Quality
●A
● PF
● cos φ
Legend:
Uxy/Ux.... line/phase voltage (x/y...1,2, 3)
UN...neutral wire voltage
unb...voltage unbalance
unbi/φnsi...current unbalance & its negative
sequence angle
Pst, Plt …flicker
Ix/IN...phase / neutral wire current
ΣI...I1+I2+I3
IPEN/IPE...ground+neutral / ground wire current
PF/3PF... single-phase / three-phase real
power factor
cosφ/3cosφ... single-phase / three-phase
fundamental harmonic power factor
P/Q/S/D.. active / reactive / apparent /
distortion power
Pfh/Qfh … fundamental harmonic active /
reactive power
3P/3Q/3S/3D/Pfh/Qfh.... three–phase P / Q /
S / D / Pfh / Qfh
f...... frequency
a.i. … analog input
Tmp..... temperature
THDU/THDI...voltage / current total harmonic
distortion
● UN, IPE, IN
● 3PF, 3cos φ, ΣI
●P
●Q
●S
● 3P / 3Q / 3S
Electricity meter group :
energy I... active work-import (demand)
energy E... active work-export (delivery)
energy L... reactive work-inductive
energy C... reactive work-capacitive
3Pmax ... maximum three–phase active
power demand
● f, a.i. / Tmp
● U/I/P/Q summary
- Actual Data Display Mode Switch
Actual
Values
Average Acts
& Maxs & Mins
Waveforms
Harmonics
15
Phasors
Events
Percent
Mode Switch
SMV / SMP / SMVQ / SMPQ
3. Detailed Description
3.1 Basic Characteristics
The instruments represent combined performance measuring and monitoring device for continuous
evaluation of electrical qualities, complying to power quality measurement methods as defined in IEC
61000-4-30 ed.2 class S requirements. They has been designed to monitor and record line-to-line and
phase voltages, currents, active, reactive and apparent powers, power factors, THD voltages and
currents, harmonic components of voltages and currents, active and reactive energy, average power
maximums, frequency and other electrical quantities in low voltage, high voltage and very high voltage
power grids. Furthermore, it also allows measuring one external quantity via its current loop input or
one temperature with external Pt100 sensor.
For special measurement purposes, the instruments can be equipped with additional firmware
modules : the voltage event module (VE), the ripple control signal measurement module (RCS) and
the general oscillogram recording module (GO).
The SMVQ/SMPQ instruments are equipped with the VE module as default. With this module, voltage
sags, swells and interruptions can be detected and registered. Furthermore, the instruments also
evaluate voltage quality according to the EN 50160 standard, measure flicker severity indexes and
inter-harmonic distortion.
The instruments are fitted with inputs for the connection of three voltage signals, a neutral voltage
signal, three fully isolated current inputs ( for use with external CTs ) as standard and additional
neutral wire current input at appropriate models. That allows measuring in five-conductor power
systems (current measurement by middle conductor – „operating zero" and its voltage against PE) –
system TT and TN-S, TN-C-S. Measurement at isolated networks ( IT ) is possible too ( neutral wire
input unconnected ).
Besides standard "X/5A“-option models, which are designed for connection of CTs with 5 AAC or 1 AAC
nominal secondary current, "F“-option models for use with the B3000/1000 Rogowski principle based
flexible current sensors and "S"- or "P"- option models for the miniature JC-line split core current
transformers or, respectively, the JP-line through-hole current transformers are available.
The power supply must be secured by a separate voltage (AC or DC). “L”-option models are designed
for 24 or 48 VDC nominal voltage auxiliary power supplies.
Continuous (gap-less) measuring is applied and true root-mean-square values ( TRMS ) of voltages
and currents are calculated. Furthermore, actual powers, power factors ( PF, λ ) and powers/power
factors of fundamental harmonic components ( cos φ ) are evaluated. The measurement of the level of
the total harmonic distortion ( THD ) of voltages and currents as well as particular harmonic
components is executed up to the 63rd order.
The instruments comprise three-rate tariff four-quadrant electricity meter with maximum average
active power ( maximum demand ) registration. All results for actual month, last month and total sum
since reset are stored in the device. A separate archive dedicated for automated meter readings can
record actual status in preselected intervals.
Except of the main record archive another archives are implemented to store information of occurring
voltage swells, dips and interruptions, archive power quality evaluations and log internal operational
journals of the instrument.
Measured data are saved in high capacity „Flash" type memory. For the time identification of
recorded data, a battery backuped real-time circuit (RTC) is used. The RTC can be synchronized with
either logical input or a remote communication link.
16
SMV / SMP / SMVQ / SMPQ
The front panel of the instrument has a local USB 2.0 communication link. A portable PC and ENVIS
program supplied as standard can, via this link, adjust the instrument and transfer recorded data. In
addition to the instrument adjustment, ENVIS program allows you to display, view and archive the
measured courses in the graphic form, as well as a number of other features.
For remote communication wide range of interfaces is optionally available. As of protocol the
instrument supports fully documented proprietary KMB message format (accompanied with free
ENVIS configuration/DAQ/archiving software). For integration with existing infrastructure the device
also supports MODBUS RTU and MODBUS TCP protocols.
Basic specifications of the instrument can be set up by using the inbuilt keyboard and the display.
Therefore the instrument can be used as a multifunction panel-mounting measuring instrument without
computer application.
Optionally, the instrument can be equipped with digital input and outputs and an analog input. The
digital input can be used for time synchronization, tariff selection or for status monitoring. The outputs
can be relay or pulse. The behaviour of relay outputs can be programmed according to the measured
values. The pulse outputs are used for transmission of active or reactive power (SO, transmitting
electricity meter). The analog input can be either 20 mA current loop type or Pt100 temperature sensor
type.
17
SMV / SMP / SMVQ / SMPQ
3.2 Manufactured Models and Marking
SMPQ 33 U 400 X/5A RI A 4
remote comm. link interface
N no remote communication link
2 RS-232
4 RS-485
E Ethernet 10BaseT
instrument model
SMV
LED numeric display
SMP
LCD graphic display
SMVQ LCD numeric display,
power quality evaluation
SMPQ LCD graphic display,
power quality evaluation
analog input
N no analog input
A 0÷20 mA current loop input
T Pt100 temperature sensor
input
measuring inputs
4 voltage + 3 current inputs
33
4 voltage + 4 current inputs
44
digital inputs / outputs
N no I / O
RR 2 relay outputs + 1 logic input
II 2 pulse outputs+ 1 logic input
RI 1 relay output + 1 pulse
output + 1 logic input
auxiliary voltage range
U 85 ÷ 275 V AC/DC
( standard )
L 20 ÷ 75 V DC
nominal measuring voltage range
400 UNOM = 200 ÷ 400 V (L-N)
( standard )
100 UNOM = 57.7 ÷ 130 V (L-N)
measuring current input type
X/5A inputs for CTs with nominal
output current of 5 A AC or
1A AC ( standard )
F B3000/B1000 Rogowski-type
sensor current inputs
Snnn JC-line low current output split
core CT (instrument standard
accessory) current input type
nnn = nominal meas. range
[A]
Pnnn JP-line low current output
through-hole CT (instrument
standard accessory) current
input type
nnn = nominal meas. range
[A]
S / P - option nominal range
S005
S015
S025
S035
S050
S075
S100
S150
S200
S250
S300
S400
S500
S600
18
P005
P015
P025
P035
P050
P075
P100
P150
P200
P250
P300
5A
15 A
25 A
35 A
50 A
75 A
100 A
150 A
200 A
250 A
300 A
400 A
500 A
600 A
SMV / SMP / SMVQ / SMPQ
Split Core Low Output Current CTs for „-S“ option instruments
instrument model
CT type
S005 ÷ S050
S75 ÷ S100
S150 ÷ S250
S300 ÷ S600
JC10F
JC16F
JC24F
JC36S-3
CT inside
diameter [ mm ]
10
16
24
36
CT dimensions [ mm]
/ mass
23 x 26 x 50 / 45 g
30 x 31 x 55 / 75 g
45 x 34 x 75 / 150 g
57 x 41 x 91 / 280 g
Through-Hole Low Output Current CTs for „-P“ option instruments
instrument model
CT type
P005 ÷ P015
P025 ÷ P150
P200 ÷ P300
JP3W
JP5W
JP6W
CT inside
diameter [ mm ]
7
13
19
CT dimensions [ mm]
/ mass
24 x 27 x 11 / 11 g
37 x 41 x 14 / 37 g
49 x 51 x 20 / 70 g
Fig. 3.1: Instrument back panel examples
SMP33 RI E : 3 current inputs, 1
output relay, 1 impulse output, 1
digital input, Ethernet
SMP44 RR A 4 : 4 current inputs,
2 output relays, 1 digital input, 1
analog input 0-20 mA, RS-485
SMPQ44 F-Option with the
SMPF-IA adapter
SMPQ44 F-Option with unmounted
SMPF-IA adapter
19
SMV / SMP / SMVQ / SMPQ
SMPQ44 S-Option
( SMPQ44 -X RR 4 )
Fig. 3.2 : Current sensors for the „F“-, „S“- and „P“-option models
JC - line current transformers
B3000 flexible current sensor
JP - line current transformers
20
SMV / SMP / SMVQ / SMPQ
3.3 Installation
3.3.1 Physical
The instrument is built in a plastic box to be installed in a distribution board panel. The instrument’s
position must be fixed with locks.
Natural air circulation should be provided inside the distribution board cabinet, and in the instrument’s
neighbourhood, especially underneath the instrument, no other instrumentation that is source of heat
should be installed.
3.3.2 Protective Conductor Connection
As already declared in the chapter 2.1 the instruments safety category is I; therefore, it is absolutely
necessary to connect the PE protective conductor to the PE terminal of the instrument ! The
recommended cross section of the protective conductor is 2,5 ÷ 4,0 mm 2, loop with diameter of 4,3
mm ( M4 terminal ).
3.3.3 Supply Voltage Connection
The instrument requires an AC or DC voltage power supply as specified in technical parameters. The
supply inputs are galvanically separated from other circuits of the instrument.
Besides the standard models, the “L”-option models for lower power supply voltages can be used.
It is necessary to connect an auxiliary supply voltage in the range as declared in technical
specifications table to the terminals AV1 ( L ) and AV2 ( N ). In case of DC supply voltage the polarity
of connection is generally free, but for maximum electromagnetic compatibility the grounded pole
should be connected to the terminal AV2.
The supply voltage must be connected via a disconnecting device ( switch - see installation diagram ).
It must be situated directly at the instrument and must be easily accessible by the operator. The
disconnecting device must be labelled as the disconnecting device of the equipment. A circuit breaker
at the nominal value of 1A may be used for the disconnecting device; however its function and
position must be clearly marked (symbols „O" and „I" according to EN 61010 - 1).
Since the instrument’s inbuilt power supply is of pulse design, it draws a momentary peak current on
powerup which is in order of magnitude of amperes. This fact needs to be kept in mind when selecting
the primary protection devices.
3.3.4 Measured Electrical Quantities Connection
3.3.4.1 Measured Voltages
Measured voltages in wye ( star ) connection or delta connection connect to terminals VOLTAGE / N,
U1, U2, and U3. It is advisable to protect the supply leads by 1A safety fuses.
For voltages in delta connection, the terminal VOLTAGE / N will stay disconnected – the potential of
the PE will appear on the terminal.
Types of connections are stated in the following table.
Tab. 3.1: Connection of the measured voltages – group of terminals VOLTAGE
Terminal
VOLTAGE
U1
U2
U3
UN
Type of connection
wye-star (Y)
delta (D)
L1-phase voltage L1-phase voltage
L2-phase voltage L2-phase voltage
L3-phase voltage L3-phase voltage
neutral wire voltage
21
Aron (A)
L1-phase voltage
L2-phase voltage
L3-phase voltage
-
SMV / SMP / SMVQ / SMPQ
The type of voltage and currents connection must be entered in Installation parameters ( parameter
group P.03 according to Tab.2.1 for SMV-instruments ): the code shows the amount of connected
phases, 3Y means three-phase connection in wye ( star ), 3D in delta. A means Aron connection. For
setup 4Y the instrument (only the “44” models) also measures current of the neutral conductor N.
In the case of indirect connection via the measuring voltage transformers, it is necessary to enter this
matter ( connection Mode ) and the values of the VT ratios during the setup of the instrument (SMV :
parameters P.02 ). The VT-ratio of neutral wire voltage can be set independently of the ratio of
voltages U1, U2, U3.
3.3.4.2 Measured Currents
Current signals must be connected to appropriate connector according the instrument model. To
measure the current of the neutral conductor, CT with a different ratio may be used. It is necessary to
enter the CT ratio values or current ranges during the setup of the instrument in Installation
parameters (group of parameters P.01 for the SMV).
During mounting, it is necessary to observe the polarity of CTs – otherwise the values of the power
factors, powers and electric energy will not be evaluated correctly.
For measuring and evaluation of three - phase power factor, three - phase powers and electric work in
Aron connection, only currents I1 and I3 will be connected.
A particular connector is provided with a screw lock to prevent an accidental pullout and possible
unwanted disconnection of the current circuit.
Examples of connections are mentioned at the appropriate chapter below.
3.3.4.2.1 Standard „X/5A”-Option Instruments – Current Signals Connection
The outputs from the current transformers (CT) are connected to terminal pairs CURRENT / I1k - I1l,
I2k – I2l and I3k – I3l, and also the current of the neutral conductor INk – INl can be connected to the
“44”-model instrument. CTs with the nominal output current of 5A or 1A can be used.
3.3.4.2.2 „F“-Option Instruments – Current Signals Connection
The F-option models are designed for the B3000/B1000 line flexible current sensors connection. For
the connection, the SMPF-IA adapter is designed (standard accessory).
WARNING : Connection of standard CTs with 5A or 1A nominal output current is forbidden !!!
Otherwise the instrument can be badly damaged !!!
Firstly, connect the adapter to the CURRENT connector. There are four round connectors (Hypertactype) for the sensors connection on the adapter.
Tab. 3.2: F-option models - CURRENT connector signals
pin No.
51
53
55
57
56
54
52,58
signal
I1 … L1 phase current
I2 … L2 phase current
I3 … L3 phase current
I4 … N (neutral wire) current
CV+... +3.3V auxiliary voltage
CV- … -3.3V auxiliary voltage
CVG - common
22
SMV / SMP / SMVQ / SMPQ
Tab.3.3 : The SMPF-IA adapter and the B3000/1000 current sensor signals
pin No.
1
2
3
4
signal
-3.3V auxiliary voltage
+3.3V auxiliary voltage
signal (UNOM = 0.5V)
common
Generally, the current sensors are interchangeable but, for better orientation, it is recommended to
respect their marking, i.e. connect the brown sensor to the L1 input, the black sensor to the L2 and the
gray one to the L3 input. If neutral wire measurement is required, connect the blue sensor to the N
input too.
Now you must set the current sensor ranges with their
range switches. The setting must correspond to preset
ranges in the instrument - you can simply list into the
installation window and check it. In our case, the ranges
of L1 to L3 phase current sensors must be set to 300A.
So the range switch position must be as shown on picture on left.
If a N-current sensor is connected, it must be set to 100 A range.
Now connect the sensors to measured network. You must connect each sensor
to the relevant point of current measurement, that is the brown coded current
sensor to live wire L1, the black coded sensor to live wire
L2, and the gray one to live wire L3. The blue sensor is
mainly for current measurements in neutral wire.
Correct polarity must be observed while connecting current
sensors. The arrow on the current sensor must show the
direction of the nominal power flow, that is from the power
source to point of consumption.
After locking up the sensor lock, adjust the sensor position
on measured conductor in order that the lock is as away of
the conductor as possible – in such position the
measurement accuracy is the best (optimal axisymmetric position is usually unreachable).
3.3.4.2.3 „S“- and „P“- Option Instruments – Current Signals Connection
The „S“- and „P“-option instruments are designed for use of miniature low current output.JC-line split
core current transformers or JP-line through-hole current transformers, respectively. According the
instrument model, corresponding CT type (see chapter 3.2 ) must be used.
WARNING : Connection of standard CTs with 5A or 1A nominal output current is forbidden !!!
Otherwise the instrument can be badly damaged !!!
The CTs must be connected with two-wire twisted cable of 3 metres maximum length to the
CURRENT connector on the instruments rear panel. For example, the KU03G24 ( Nexans ) cable can
be used; the cable can be shipped together with the CTs, if ordered.
During installation, it is necessary to respect the CTs K - L orientation that is marked on the CTs guide
groove.
23
SMV / SMP / SMVQ / SMPQ
Tab. 3.4: S- and P- option models - CURRENT connector signals
pin No.
41, 42
43, 44
45, 46
47, 48
signal
I1k, I1l … L1 phase current
I2k, I2l … L2 phase current
I3k, I3l … L3 phase current
INk, INl … N (neutral wire) current
3.3.5 Connection Setting
For the proper data evaluation it is necessary to set all of the Installation Setting group parameters.
3.3.5.1 Connection Mode, Type and VT/CT Ratios
Connection Mode ( P.02/2 at SMV) determines if voltage signals are connected directly or if voltage
transformers are used.
Connection Type ( P.03/2 ) needs to be set according network configuration – delta ( D ) or wye ( Y )
– and if a neutral wire current is directly measured or not ( 3Y / 4Y, for “44”-models only ).
CT- ratios ( P.01/2÷4 ) must be specified, in case of “via VT” connection mode VT-ratios ( P.02/3÷4 )
too. The ratio values can be set different for phases and for a neutral wire.
The VT-ratios must be set in form Nominal primary voltage / 100 V . If VTs with different secondary
voltage are used, the nominal primary voltage must be recalculated to 100 V of secondary voltage for example if a VT with ratio of 220 kV / 110 V is used value 200 kV / 100 V must be set.
CT ratios can be set in form either …/ 5A or …/ 1A.
Instead the CT-ratios, you must set current ranges of used current sensors at the F-option
instruments.
The S- and P-option instruments have fixed range of the current measured, indicated in the parameter
I-Range , which can not be changed. However, you can use the Multiplier parameter, that the
measured current values are multiplied with automatically. This can be used both to set the desired
range when connecting the instrument external current transformers to the secondary windings of a
pre-connected standard-type CT with nominal output current of 5A or 1A. Other possible uses are
applications where, for better precision of measurement, more turns of the measured circuit are wound
on the instrument transformers; in such cases the value of the multiplier can be entered as a decimal
number less than 1.
Nominal frequency fNOM ( P.03/3 ) - the parameter must be set in compliance with the measurement
network nominal frequency to either 50 or 60 Hz.
3.3.5.2 Nominal Voltage UNOM and Nominal Power PNOM
For the presentation of voltages and powers in percent of nominal value, voltage events detection, the
power quality evaluation and output relays setting and other functions it is necessary to enter also the
nominal ( primary ) voltage of the measured mains UNOM and nominal three-phase power (input power)
of the connected load PNOM. Although the correct setup of the UNOM and PNOM has no effect on
measuring operation of the instrument, it is strongly recommended to set at least the UNOM correctly.
Correct setting of the PNOM is not critical, it influences percentage representation of powers and
currents, output relay behaviour and statistical processing of measuring in the software only. If the
PNOM of measured network node is not defined, we recommend to set its value, for example, to the
nominal power of source transformer or to the maximum supposed power estimated according current
transformers ratio, etc.
The UNOM is displayed in form of phase/line voltage.
24
SMV / SMP / SMVQ / SMPQ
At SMV/SMVQ instruments these specifications can only be set by using a PC.
3.4 Instrument Manual Manipulation and Setting
3.4.1 SMV/SMVQ Instrument Manipulation and Setting
SMV instruments manual manipulation is described in chapters 2.2 and 2.3. Due to limited possibilities
of its numeric display, only the main measured values can be displayed and basic parameters can be
set manually. Most of parameters can be set via a communication link only using ENVIS program.
Meaning of all parameters is common for both SMV/SMVQ and SMP/SMPQ instruments and it is
described in the following chapters below with detailed description of operation.
Due to different display type the SMV/SMVQ instruments have a special parameter ( P.04/4 ). With the
parameter the brightness of the display can be adjusted in three scales.
3.4.2 SMP/SMPQ Instrument Manipulation and Setting
Instruments manual manipulation is described in chapters 2.4 and 2.5. In this chapter further details
are explained and the overview of manually presetable parameters is listed.
3.4.2.1 Data Area – Status Bar - Toolbar
Instrument's screen consists of two parts : a data area and a status bar/toll bar area.
Fig. 3.3: Data Area, Status Bar, Toolbar
indicator
data area
status bar
toolbar
After instrument's startup the status bar appears below data area as default. The status bar contains
following information :
•
… digital output No.1 and No.2 state ( 0 = open, 1 = closed )
•
… digital input state ( 0 = open, 1 = closed )
•
… local time ( hours : minutes)
As soon as any button is pressed, a toolbar replaces the status bar. The toolbar determines function
of individual buttons and changes dynamically by a context.
In special cases a flashing indicator can appear at upper right corner of the data area. It indicates
following cases :
•
•
… Frequency measurement not yet finished or out of range. In such cases measured
signals are scanned according preset nominal frequency fNOM ( P.03/3 ) and measured values
can be incorrect. Check fNOM parameter setting.
… At least one of voltage or current input overloaded
•
… Remote communication in progress. This indicator is supressed approx. 10 seconds
after any button pushing.
•
… Data into archives recording not yet started; the instrument is waiting until preset
Recording Start Time occurs.
25
SMV / SMP / SMVQ / SMPQ
•
… Data into archives recording and electricity meter operation is blocked. For detailed
description see Record Blocking chapter.
If no button is pressed during about one minute, the status bar replaces the toolbar again.
3.4.2.2 Main Menu
Fig. 3.4: Main Menu
By pressing the
button, a Main menu window appears. With the
►and ◄ buttons you can browse through the menu and select a desired
action with the button or return back using the
(escape) button.
Although all other buttons but the
button are context dependent
and variable, the
button is accessible from nearly every window
which helps to quick orientation. The menu options consist of :
•
Actual data group ( all of measured data in both numeric and graphic form )
•
Daily and weekly graphs of main quantities
•
Electricity meter data group ( electric energy and maximum demand values )
•
Power quality data group ( list of weekly power quality results )
•
Instrument setting ( presetable parameters )
•
Instrument lock
•
Information ( instrument type & serial number, memory usage state etc. )
•
Record and electricity meter operation blocking. For detailed description see
Record Blocking chapter.
3.4.2.3 Actual Data Group
Actual values in numeric form appear when Actual data group is selected as default ( see
Fig. 2.3 ). Navigation through the actual values branch is intuitive using the navigation
buttons. For detailed description of the actual values presentation see chapter Display Actual Values
Evaluation and Aggregation further below.
All the values are identified with a quantity name and a quantity unit. An U/I/P/Q summary window is
an exception – the quantity unit is not displayed (only a k / M / G multiplier is). At the last column,
which is marked N/3p , values of following quantities are displayed :
Fig. 3.5 : Actual Data
Summary Window
Tab. 3.5: Summary window N/3p column quantities
row
ULL
ULN
I
PF
P
Q
N/3p column quantity
unbU - voltage unbalance
UN - neutral wire voltage
IN / IPEN - neutral wire or calculated common pole current
( depends on connection type )
3PF – three-phase power factor
3P – three-phase active power
3Q – three-phase reactive power
26
SMV / SMP / SMVQ / SMPQ
Fig. 3.6 : Actual Data
Display Mode Switch
The actual data group comprises other actual data presentations that are
accessible with the
button - so called actual data display mode
switch . When pressed, a pull up menu rolls over the display temporary.
By multiple pressing of the button a desired actual data subgroup can be
selected and displayed :
•
Actual values – values of all measured
quantities in numeric format.
•
Average values – average values of main
measured quantities including their maximums & minimums. For detailed description see
chapter Display Average Values Evaluation and Aggregation further below.
Waveforms – actual wave shapes of all measured voltage and current
•
signals.
•
Harmonics – actual harmonic components of all voltage and current signals
in both numeric and graphic ( histogram ) formats. For detailed description see chapter
Harmonics and THD Presentation.
•
Phasors – diagrams of voltage and current fundamental harmonic phasors. A
phase sequence can be checked here too (indicated as 1-2-3 or 1-3-2 ).
•
Voltage events – dips, swells and interruptions ( at instruments with the VE
additional firmware module installed only; standard feature at the SMVQ/SMPQ instruments).
For detailed description see chapter VE Module - Voltage Events further below.
With the last option of the display mode switch – V,A,W↔% – voltage, current and power quantities
expression can be switched between basic units and percents relative to preset nominal voltage UNOM
and nominal power PNOM .
3.4.2.4 Daily and Weekly Graphs
A one-week history of main measured quantities ( such as voltages, currents, powers and
power factors ) is registered in the instrument's memory cyclic buffer. Individual courses
can be displayed for rough check ( for detailed check at a PC a main archive is intended, see
appropriate chapters further below ).
Fig. 3.7 : Weekly Graph, Daily Graph
With the
button, either whole week or
specified day of the passed week can be
selected – on the graph, the day is identified
with its shortcut ( Mo = Monday, for example ).
Excluding of seven passed days, so called Sday and M-day can be viewed too.
The S-day is a predefined day of year. The S-day record refreshes once per year only. The M-day is
the day when maximum 15-minute average value of ΣI occurred. Both the S-day date can be preset
and the M-day record can be cleared via communication link with ENVIS program only. For details see
the ENVIS program manual.
With the ►button desired group of quantities can be selected. For listing through the selected group,
use the ▲and ▼buttons.
27
SMV / SMP / SMVQ / SMPQ
3.4.2.5 Electricity Meter Data Group
An electricity meter group comprises registered electric energy and maximum active power
demand values. For detailed explanation see chapter SMP/SMPQ Instrument Energy
Data Presentation further below.
3.4.2.6 Power Quality Data Group
Only SMPQ instruments present power quality evaluation ( SMVQ instruments evaluate the
power quality too, but you can see results in the ENVIS program only ). Weekly records
contain information about voltage quality compared with predefined limits according the EN 50160
standard. For detailed explanation see the chapter Power Quality further below.
3.4.2.7 Instrument Setting
In this group most of presetable parameters can be viewed and edited. Other parameters
can be accessed via communication link from a PC using ENVIS program only.
If any of setting window is viewed, an instrument automatically reswitches to actual data display during
an approx. 1 minute if no manipulation with buttons is carried out.
Following chapters explain the meaning of particular groups of parameters. If a corresponding
manually presetable parameter exists in SMV instrument, its number is specified in parenthesis.
3.4.2.7.1 Display Setting
•
Contrast … LCD display contrast. Correction of preset value isn't usually necessary, only at
working temperatures near allowed range may be useful.
•
Backlight … LCD display backlight can be set as permanently on ( on ) or to auto-off mode (
auto ), in which it is switched off automatically during approx. 20 seconds if no button is
pressed to decrease the instrument power dissipation.
•
Language … Except the basic English version, other national versions can be selected
•
Display refresh cycle ( SMV : P.04/2 )… Actual values refresh period expressed in mains
cycles. For details see chapter Display Actual Values Evaluation and Aggregation.
•
Display Resolution ( SMV : P.04/3 ) … Actual data format can be set to 3 or 4 significant
figures ( exception : not applicable for electric energy values ).
•
Display Autoreswitch & Default Window … If this function is not activated (option no ) last
displayed measured data window remains on the screen until changed manually. If scroll 3s
option is selected actual data are listed automatically from window to window every 3
seconds. At the last option – default 1m – preset Default Window is displayed automatically
after 1 minute of no button operation.
3.4.2.7.2 Installation Setting
All parameters of this group are explained in chapter Connection Setting .
3.4.2.7.3 Clock Setting
•
Date & Time ( SMV : P.09 ) … Local date and time.
•
Time Zone ( SMV : P.08/2 ) … The time zone should be set according location of an
instrument during installation. Correct setting is essential for proper local time
interpretation.
•
Daylight Saving ( SMV : P.08/3 ) … This option controls automatic winter/summer
local time switching.
28
SMV / SMP / SMVQ / SMPQ
•
Time Synchronization ( SMV : P.08/4 ) … As the built-in real time circuit ( RTC ) has
limited accuracy while free running, with this option it is possible to keep the RTC time in
synchronism with an external precise time source. The RTC can be synchronized by :
•
Communication Link ...If an instrument is equipped with remote communication
interface of type either RS-485 or RS-232, an external ( usually GPS-based ) time
receiver can be connected to. The receiver must support the “NMEA 0183” protocol (
“ZDA”-message ). Note that when activating this option communication protocol of
the remote communication link must be set to TS-NMEA option ( see chapter
Communication Setting ).
•
Pulse Per Minute ( PPM ) … A digital input is used for time synchronization from an
external source at this case. The instrument sets the RTC to the nearest minute as
soon as a synchronization pulse is detected. Minute-, quarter-hour- or hoursynchronization pulses are accepted.
Warning : When editing clock parameters, it must be taken into account that internal data
archives are affected :
•
when changing the date or time, all archives are cleared !
•
when changing the time zone or the daylight saving option, archives that are
controlled by local time ( electricity meter state and archive if tariff zones
controlled by table, graph archives, S-day/M-day archives, PQ-archives ) are
cleared !
3.4.2.7.4 Average Values Processing Setting
In this parameter group average values processing for both of U/I -group and P/Q/S -group of
measured quantities can be set. Detailed explanation can be found in chapter Average Values
Evaluation further below.
Furthermore, flicker severity aggregation intervals can be set in this parameter group ( see chapter
Flicker Evaluation ).
3.4.2.7.5 I/O Setting
In this group an alarm LEDs ( A1, A2) function and behaviour of digital outputs ( O1 , O2 ) can be
preset. For detailed description see chapter Inputs & Outputs further below.
3.4.2.7.6 Remote Communication Setting
Communication parameters for various interface types differ from each other :
RS-232 / RS-485 interface :
•
Communication Address ( SMV : P.20/3 ) …Address can be set in range 1÷ 254.
•
Communication Rate ( SMV : P.20/2 ) …Communication rate in Bauds.
•
Communication Protocol ( SMV : P.20/4 ) … The communication protocol can be set to:
•
KMB ...Manufacturer's proprietary protocol ( default protocol for use with ENVIS
program )
29
SMV / SMP / SMVQ / SMPQ
•
•
MODBUS-N/E/O … Modbus-RTU protocol. Parity can be set as none/even/odd,
respectively.
•
TS-NMEA … NMEA 0183 protocol for time synchronization with external time
source.
Non-transparent Link … When non-transparent communication link ( such like GSM
wireless networks ) this option forces an instrument to tolerate longer transmission delays
and interbyte gaps.
Ethernet interface :
•
DHCP … dynamic IP-address allocation, on/off
•
IP Address ( SMV : P.20/2 ) …Internet protocol address.
•
Subnet Mask ( SMV : P.20/3 ) …Subnet mask.
•
Default Gateway ( SMV : P.20/4 ) …Default gateway.
•
KMB-port ( SMV : P.21/2 ) … Communication port used for KMB protocol communication.
•
Web-port ( SMV : P.21/3 ) … Communication port used for webserver communication.
•
Modbus-port ( SMV : P.21/4 ) … Communication port used for Modbus protocol
communication.
3.4.2.7.7 Embedded Electricity Meter Setting
In this group parameters concerning electric energy registration and maximum active power demand
processing can be set. For detailed parameter description see chapter Embedded Electricity Meter
further below.
3.4.2.7.8 Archiving Setting
To check correct setup of the main archive, it is possible to visualize its settings in this sub-menu. On
the panel it is possible to check its record period, separate options for quantities and phases, preset
S-day date etc. Quantities with extensive options such basic quantities or separate powers are
displayed in separate screens which can be opened on lines with “...” symbol. All of the items are read
only.
Checking and editing of all of archives´ settings are possible via a communication link from a PC with
ENVIS-DAQ program only.
3.4.2.7.9 Power Quality Evaluation Setting
Main PQ evaluation setting limits only can be checked in this window. The setting is read only.
Checking and editing of all of PQ quality parameters, event trends, oscillograms etc. are possible via a
communication link from a PC with ENVIS-DAQ program only – see the ENVIS program manual.
30
SMV / SMP / SMVQ / SMPQ
3.4.2.8 Instrument Lock
An instrument can be locked/unlocked at this window. The lock functionality description can be found
at chapter The Instrument Lock .
3.4.2.9 Instrument Information
The instrument identification and actual status are listed in this group. The information are split up to
three windows that can be browsed through with the ►button.
3.4.2.9.1 Info – General Window
•
Instrument Model & Serial Number … Instrument hardware model & serial No.
•
Instrument Hardware, Firmware & Bootloader Versions …Instrument hardware &
firmware specification.
•
Object Number … Measured node specification ( preset by ENVIS program for data
identification ).
•
Error Code … Indicates instrument hardware or setting problem. At normal state equals to 0.
If any error occurs it contains a number in range 1÷ 255 created as the sum of the binary
weights of up to eight possible causes. In the following table you can find list of them and
recommended procedure. non-zero contact service organization
Tab 3.6 : Instrument Errors
Error No. Weight
•
Meaning
Procedure
1
2
instrument setting error with the ENVIS-DAQ program perform the
Device Reset ; when the error occurs
repeatedly, send the instrument to a service
organization for repair
2
4
calibration error
the instrument recalibration is necessary;
send the instrument to a service
organization
4
16
RTC setting error
perform the RTC setting – either in the RTC
setting window or using the ENVIS-DAQ
program; when the error occurs repeatedly,
send the instrument to a service
organization for repair
7
128
archive data error
with the ENVIS-DAQ program perform the
Clearing of all archives ; when the error
occurs repeatedly, send the instrument to a
service organization for repair
Work Time …Total instrument work time in days, hours and minutes.
3.4.2.9.2 Info – Archive Status
At this submenu actual state of individual archive buffers can be checked. Detailed information of each
buffer can be viewed with the
button : actual record item pointer, total capacity of the buffer in
data record items and corresponding start and end date of the buffered archive are available.
At the last row actual number of internal flash memory bad sectors is displayed. During instrument's
lifetime some blocks (up to several tens ) of the memory can get wrong. The flash memory blocks are
31
SMV / SMP / SMVQ / SMPQ
permanently checked and in case of failure the wrong block is no longer used and replaced with a
spare block.
3.4.2.9.3 Info – Producer
At this submenu there is producer's logo and website URL-address only.
3.5 Description of Operation
3.5.1 Method of Measurement
The measurement consists of three processes being performed continuously and simultaneously:
frequency measuring, sampling of voltage and current signals and evaluation of the quantities from
the sampled signals.
3.5.1.1 Voltage Fundamental Frequency Measurement Method
The voltage fundamental frequency is measured continuously and evaluated every 10 seconds.
Logical sum of all voltage signals is led through a low-pass filter and then processed.
The fundamental frequency output is the ratio of the number of integral mains cycles counted during
the 10 second time clock interval, divided by the cumulative duration of the integer cycles.
If value of frequency is out of measuring range, such state is indicated with flashing Hz,a.i. LED (for
SMV instruments) or indicator ( flashing symbol ) f at upper right corner ( SMP/SMPQ ).
3.5.1.2 Voltage and Current Measurement Method
Both voltage and current signals are evaluated continuously as required by IEC 61000-4-30, ed. 2
standard. The unitary evaluation interval, a measurement cycle, is a ten / twelve ( value behind slash
is valid for fNOM = 60 Hz ) mains cycles long period ( i.e. 200 ms at frequency equal to preset fNOM ),
which is used as a base for all other calculations.
The sampling of all voltage and current signals is executed together with the frequency of 128 / 96
samples per mains cycle. The sampling rate is adjusted according to the frequency measured on any
of the voltage inputs U1, U2, U3. If the measured frequency is in measurable range at least on one of
these inputs, then this value will be used for operating the subsequent sampling. If the measured
frequency is out of this range, the preset frequency value ( fNOM ) is used and measured values may
be incorrect.
When exceeding the measuring range of any voltage or current, the instrument indicates overload : at
SMV/SMVQ instruments by a flashing specification of the overloaded voltage or current value; at
SMP/SMPQ instruments by indicator ( flashing symbol ) > at upper right corner of display.
Effective values of voltages and currents are calculated from sampled signals over the measurement
cycle using formulas (examples for phase No. 1) :
U1 =
Phase and neutral wire voltage (effective value) :
n
1
∑
n
UN =
2
Ui1 ;
i= 1
∑
n
(Ui1− Ui 2)
i= 1
I1 =
Current (effective value) :
where : i …........ sample index
32
1
n
n
∑
i= 1
n
∑
n
i= 1
n
1
U 12 =
Line voltage (effective value) :
1
Ii 12
2
UiN
2
SMV / SMP / SMVQ / SMPQ
n ........... number of samples per measurement cycle ( 1280 / 1152 )
Ui1, Ii1 … sampled values of voltage and current
∑
Phase Current Sum :
I = I1 + I 2 + I 3
The data for the longer measurements are aggregated from these measurement cycles. Long time
interval starts after the RTC tick occurrence at the beginning of the next measurement cycle time
interval. This principle is used in compliance with the standard for power quality evaluation and also
enable to configure other intervals from 10 / 12 mains cycles up to 24 hours for each measurement in
certain other applications.
Measured phase voltages U1 to U3 correspond to the potential of terminals VOLTAGE / U1 to U3
towards the terminal VOLTAGE / N. Voltage UN corresponds to the potential of the terminal
VOLTAGE / N towards the terminal PE.
At 4Y connection type four currents - I1, I2, I3, IN - are directly measured, otherwise only three currents
I1, I2, I3 are. In all cases of connections another current is calculated from samples of directly
measured ones as negative vector sum of all measured current vectors ( Kirchhoff rule ). The
calculated current is referenced as IPE or IPEN, respectively.
Tab. 3.7: Calculated currents
connection
type
directly measured
currents
calculated
current
4Y
I1, I2, I3, IN
IPE
other
I1, I2, I3
IPEN
calculated current
vector evaluation formula

   
I PE = − ( I1 + I 2 + I 3 + I N )

  
I PEN = − ( I1 + I 2 + I 3 )
Both of the IPE and IPEN current values can be viewed at the display of the SMP/SMPQ models. For
SMV/SMVQ instruments, only the IPEN can; the IPE current value is available on a PC via
communication with ENVIS program only.
3.5.1.3 Power and Power Factor Evaluation Method
Power and power factor values are calculated continuously from the sampled signals according to
formulas mentioned below. The formulas apply to basic type of connection – wye (star).
Active power :
P1 =
n
1
∑
n
Ui1 × Ii1
i= 1
where : i …........ sample index
n ........... number of samples per measurement cycle ( 1280 / 1152 )
Ui1, Ii1 … sampled values of voltage and current
Reactive power :
Q1 =
25
∑
k=1
U k ,1 × I k ,1 × sin ∆ ϕ k ,1
where : k … harmonic order index
Uk,1, Ik,1 … the kth harmonic components of voltage and current ( of phase 1 )
Δφk,1 ... angle between the kth harmonic components Uk,1, Ik,1 ( of phase 1 )
( these harmonic components of U and I are evaluated from each measurement cycle )
33
SMV / SMP / SMVQ / SMPQ
Apparent power :
S1 = U 1 × I 1
Distortion power :
D1 =
Power factor :
PF 1 = P1 / S 1
Three-phase active power: :
3P = P1 + P 2 + P 3
Three-phase reactive power :
3Q = Q1 + Q 2 + Q 3
Three-phase apparent power :
3S = S 1 + S 2 + S 3
Three phase distortion power :
3D =
Three-phase power factor :
3PF = 3P / 3S
S 12 − P12 − Q12
3S 2 − 3P 2 − 3Q 2
3.5.1.4 Fundamental Harmonic Power, Power Factor and Unbalance Evaluation Method
Using Fourier transform algorithm, fundamental harmonic components of voltages and currents are
continuously calculated.
Following quantities are evaluated :
Fundamental (= 1st) harmonic component of phase voltage :
Fundamental (= 1st) harmonic component of current :
Absolute angle of fundamental voltage component phasor :
Fundamental current component phasor angle relative to phasor Ufh1 :
Relative angle between correspondent fundamental voltage and current phasors :
Fundamental harmonic power factor :
cos ∆ ϕ 1
Fundamental harmonic active power :
Pfh1 = Ufh1 × Ifh1 × cos ∆ ϕ 1
Fundamental harmonic reactive power :
Qfh1 = Ufh1 × Ifh1 × sin ∆ ϕ 1
Fundamental harmonic three-phase active power :
3Pfh = Pfh1 + Pfh 2 + Pfh3
Ufh1
Ifh1
φU1
φI1
Δφ1
Fundamental harmonic three-phase reactive power : 3Qfh = Qfh1 + Qfh 2 + Qfh3
Fundamental harmonic three-phase power factor :
3 cos ∆ ϕ = cos(arctg (
3Qfh
))
3Pfh
Powers and power factors of the fundamental harmonic component (cos φ) are evaluated in 4
quadrants in compliance with the standard specifications IEC 60375, see Fig. 3.8.
34
SMV / SMP / SMVQ / SMPQ
Fig. 3.8: Identification of consumption- supply and the character of reactive power according to phase
difference (in compliance with IEC 60375)
quadrant II
active power export
reactive power import
power factor capacitive (C) character
quadrant I
active power import
reactive power import
power factor inductive (L) character
Ir+
S
Q
ϕ
Ia-
Ia+
P
quadrant III
active power export
reactive power export
power factor inductive (L) character
quadrant IV
active power import
reactive power export
power factor capacitive (C) character
Ir-
For outright specification of the quadrant, the power factor of the fundamental harmonic component –
cos φ – is expressed according to the graph with two attributes :
• a sign ( + or - ), which indicates polarity of active power
• a character ( L or C ), which indicates the power factor character ( the polarity of reactive
power relative the active power )
Voltage and current unbalance evaluation is based on negative/positive sequences of voltage and
current fundamental harmonic components :
Voltage unbalance :
Current unbalance :
voltage _ negative _ sequence
× 100%
voltage _ positive _ sequence
current _ negative _ sequence
unbI =
× 100%
current _ positive _ sequence
unbU =
Current negative sequence angle : φnsI
All of angle values are expressed in degrees in range [ -180.0 ÷ +179.9 ].
3.5.1.5 Voltage Events Evaluation Method
For PQ-voltage events detection and registration, effective voltage values of each half of mains cycle (
U1(1/2) ) are evaluated in compliance with IEC 61000-4-30 ed.2 :
U 1rms (1 / 2 ) =
1
n
∑
n
i= 1
2
Ui1 ;
I 1rms (1 / 2) =
where : i …........ sample index relative to the begin of a half-period
n ........... number of samples per mains cycle ( 128 / 96 )
Ui1, Ii1 … sampled values of voltage and current
35
1
n
n
∑
i= 1
Ii 12
SMV / SMP / SMVQ / SMPQ
3.5.1.6 Harmonics, Interharmonics and THD Evaluation Method
Entire spectrum of harmonic and interharmonic components and THD is evaluated discontinuously periodically every second from 10 / 12 mains cycles long signal according to IEC 61000-4-7 ed.2 as
harmonic sub-groups (Hsg).
Following quantities are evaluated :
Harmonic and interharmonic components of voltage and current up to 63rd order : Uih1, Iih1
( i …. order of harmonic component )
Relative angle between corresponding voltage and current harmonic phasors of i-th order : Δφi1
50
1
2
∑ Uih1 × 100%
i
=
2
U 1h1
50
1
2
∑ Iih1 × 100%
Total harmonic distortion of current : THDI 1 =
I1h1 i = 2
Total harmonic distortion of voltage : THDU 1 =
3.5.1.7 Flicker Evaluation Method
Flicker severity (Pst,Plt) is evaluated continuously by algorithm defined in IEC 61000-4-15. Short term
flicker ( Pst ) evaluation period tPST can be set to 1, 5, 10 or 15 minutes. Long term flicker ( Plt )
evaluation period tPLT is integral multiple of the tPST period – the multiplication factor is presetable.
The flicker evaluation presetable parameters are situated in average setting window of the SMPQ
instruments (at the SMVQ instruments, in the ENVIS-DAQ program via a communication interface
only).
3.5.1.8 Ripple Control Signal (RCS) Evaluation Method
The ripple control signal is evaluated using the DFT algorithm each 5 mains cycles :
U 1rc =
1
n
∑
n
Ui1 ;
2
i= 1
where : i …........ sample index
n ........... number of samples per 5 mains cycles ( 640 / 576 )
Ui1, Ii1 … sampled values of voltage and current
3.5.2 Measured Values Evaluation and Aggregation
As described above, measured values are evaluated according to IEC 61000-4-30 ed.2, based on
continuous (gap-less), 10 / 12 mains cycles long intervals ( measurement cycle ) processing.
Further aggregation of the actual values from this evaluation is used to obtain values for displaying
and recording.
3.5.2.1 Display Actual Values Evaluation and Aggregation
Actual ( instantaneous ) values of measured quantities, that can be viewed on instrument's display,
are evaluated each display refresh cycle as average of integral number of measurement cycle values.
The display refresh cycle duration is presetable in mains cycle units as shown on Fig. 3.9 ( for SMV
instruments parameter P.04/2 applies ).
For example at default setting, which is ( at fNOM = 50 Hz ) 30 mains cycles ( i.e. 3 measurement
cycles), the actual value is calculated as average of 3 measurement cycle values.
36
SMV / SMP / SMVQ / SMPQ
At SMP/SMPQ instruments, maximum (marked as ↑ ) and minimum ( ↓ ) measurement cycle values
registered during the display refresh cycle interval are displayed too (at SMV instruments these values
are not available).
Fig. 3.9: Actual data display
refresh cycle setting
Fig. 3.10: Actual data
maximum measurement cycle
value during refresh cycle
display refresh cycle
average value
minimum measurement cycle
value during refresh cycle
Note 1 : Frequency, harmonics&THD, flicker and analog input values aggregations are different
(described in appropriate chapter ).
Note 2 : Neither maximum nor minimum of cosφ values are evaluated due to special character of the
quantity. Similarly, these extreme values are not evaluated at frequency, harmonics&THD, flicker and
analog input values too due to a specific measurement method.
3.5.2.2 Average Values Evaluation
From measurement cycle values, average values of all basic quantities are calculated. Following
parameters can be set to control the way of averaging :
•
averaging method, which can be set to one of :
•
• fixed window
• floating window
• thermal
averaging period in range from 1 second to 1 hour
When fixed window averaging is set, values are calculated from fixed block intervals. The values are
updated at the end of every interval. Beginnings of the intervals are synchronized to the nearest whole
time ( for example, when averaging period is set to 15 minutes, the average values are updated four
times per hour in xx:00, xx:15, xx:30 and xx:45 ).
When floating window is set, the internal cyclic buffer is used to store auxiliary partial averages. The
buffer has depth of 60 values. If preset average period is 1 minute or shorter, partial averages of a
quantity are buffered each second and new average values are updated from the preset averaging
period each second. If the preset average period is longer than 1 minute, partial averages for longer
duration are buffered and the average values are updated less frequently ( for example, if the preset
average period is 15 minutes, partial averages are buffered each 15 seconds and average values are
updated with this frequency ).
Thermal averaging method is different. An exponential function simulation is used to get the thermal
dependence. Unit step time response depends on the preset averaging period – during this period, an
average value reaches about 90 % of unit step amplitude.
Average values processing can be set independently for two groups of quantities : so called U/I -group
and P/Q/S -group. Following table lists processed quantities of both groups.
37
SMV / SMP / SMVQ / SMPQ
Tab. 3.8 : Average values groups
Average values group
Averaged quantities
“U/I”
“P/Q/S”
ULL, ULN, I, f, analog input
P, Q, S, PF, Pfh, Qfh, cosφ
SMV instrument averaging setting
related parameter No.
P.05
P.06
To display average values SMP/SMPQ instruments, while in actual data window press the
button
several times until
- option is selected. Average values are marked with a bar over
quantity name ( see below ).
Fig. 3.11 : Average data
processing setting
Fig. 3.12 : Average data
maximum average value
reached since last clearing
average value
minimum average value
reached since last clearing
At SMV instruments, you can navigate to average values with the button ►or ◄ until the avg.,-LED
is lit.
3.5.2.2.1 Maximum and Minimum Average Values
Maximum and minimum values of average values are registered into the instrument's memory
including the date & time of their occurrence.
Fig. 3.13 : Maximums of
average values
At the SMP/SMPQ instruments, the maximums&minimums are
displayed on the left side of average values window - maximum
value is identified with the ↑ symbol and minimum value with the ↓
symbol.
To view their time stamps, press the ►button until, for example Max
is selected. Maximum average value window appears. On the left of
each maximum value, its time stamp is displayed. The symbol ↑
after the time data means that the displayed value is maximum. You
can display minimum average values in similar way.
At SMV/SMVQ instruments, press the buttons ►or ◄ until both avg.,and max. or min. -LEDs light
on simultaneously. Time stamps cannot be viewed.
The maximum and minimum registered values can be cleared either manually or automatic clearing
can be set.
To clear the values manually at SMP/SMPQ instruments, press the ►button until Clear option is
selected. Then at the confirmation window press the button.
Fig. 3.14 : SMV – Clear time
window
SMV 44
VLL
VLN
A
W
var
VA
PF
cos
8.05
2009
17.42
inst.
avg
k
Pav
CLRT
USB
max
.
min
M
time
THD
har
m
En1
p
En3
p
To clear the maximums&minimums at SMV/SMVQ instruments, date
& time of last clearing window must be viewed first. Navigate with the
buttons ►or ◄ until all of avg., max. or min. and time -LEDs light
on – the simultaneously. The window can look as ob Fig. 3.10.
k
M
Now simultaneously press the ►and ◄ buttons – the date & time of
last clearing will start flashing. Then confirm with the button ▼and
min/max average values are cleared ( pressing different buttons will
not reset the values ). Successful clearing is indicated with message
Clr for about one second.
Hz, i
38
SMV / SMP / SMVQ / SMPQ
To activate automatic clearing of maximums/minimums of average values, set the automatic clear
period ( the last option at window on Fig. 3.5 at SMP/SMPQ instruments, or P.05/4 and P.06/4
parameters at SMV/SMVQ instruments ).
Note 1 : Only the appropriate group ( U/I or P/Q/S ) of average maxs/mins is affected by single
clearing ! Each group must be cleared or set individually.
Note 2 : If the instrument is locked, resetting is not possible.
3.5.2.3 Recorded Values Aggregation
All measured and evaluated data can be optionally archived into the instrument's memory. The record
period is presetable in a wide range and aggregated data are archived.
The shortest aggregation interval is 1s while the longest configurable interval is 2 hours. If seconds
are selected then intervals are aggregated according to cycle count at actual frequency. Intervals
longer than one minute are aggregated according to a real time tick. All 150 cycle, 10 minutes and 2
hours aggregations are evaluated in compliance with IEC 61000-4-30 ed.2.
Where applicable not only the average value but minimum and maximum values over aggregation
interval can be stored too.
3.5.3 Harmonics, Interharmonics and THD
3.5.3.1 Harmonics, Interharmonics and THD Aggregation
No aggregation of harmonic & interharmonic components and a THD is performed – only actual
values evaluated from a single measuring cycle ( 10 / 12 mains cycles long signal ) are available.
3.5.3.2 Harmonics and THD Presentation
Fig. 3.16 : Harmonics
At the SMP/SMPQ instruments, harmonic components up to 45th order in
both numeric and graphic format can be viewed at Actual data group. At
the numeric format – a table – a value of Total Harmonic Distortion
( THD ) is displayed too. You can list through all measured phase voltage
and current signal harmonics with the ▲and ▼buttons.
With the ►button you can switch between :
• voltage and current signals using U↔I switch
•
absolute ( volts, amps ) or relative ( percentual ) harmonic
values expression using V,A↔% switch
•
graphic and numeric representation using
•
odd and event harmonics ( at numeric format only ) using 2-46↔1-3-5 switch
↔123 switch
If current harmonics are displayed in numeric format and expressed in amperes, their values are
extended with a sign. The sign indicates if a current phasor of appropriate harmonic is delayed after its
voltage phasor ( positive value ) or if the current phasor foreruns the voltage one ( negative value ).
This information can be useful for a harmonic distortion source location.
At the SMV/SMVQ instruments,harmonic components up to 40th order and THD can be displayed, as
described in chapter SMV/SMVQ Instrument Operation. Phase voltage harmonics are expressed in
percents, current harmonics in amperes.
Harmonics of higher order and all interharmonics are available only on a PC at ENVIS program.
39
SMV / SMP / SMVQ / SMPQ
3.5.4 Embedded Electricity Meter
For the electric energy measurement, a stand-alone functional unit - an electricity meter - is
implemented inside instruments. Except of electric energy, maximum active power demands are
registered in the unit.
3.5.4.1 Electric Energy Processing
Measured values of electrical energy are recorded separately in four quadrants : active energy
consumed ( I, import ), active energy supplied ( E, export ), reactive energy inductive ( L ) and reactive
energy capacitive ( C ). Both single-phase and three-phase energies are processed.
In addition, three-phase energies are evaluated in three preset tariff zones ( time of use ). The actual
tariff can be controlled either by an actual RTC time using preset tariff zone table with one hour
resolution or by an external signal through a digital input.
Internal energy counters have a sufficient capacity in order not to overflow during the whole instrument
lifetime. On the instrument's display only 9 digits can be viewed – therefore, after energy value
exceeds 999999999 kWh/kvarh, instrument's display format automatically switches to MWh/Mvarh,
then to GWh/Gvarh.
Electricity meter data are periodically archived with a preset registering interval into the instruments
memory and can be analysed later after being downloaded into a PC.
3.5.4.2 Maximum Active Power Demand Registration
From the instantaneous measured values of all active powers the instrument evaluates their average
values per preset period using preset averaging method – active power demands. Note that for the
active power demands, which are processed in an electricity meter unit, differ from standard average
values and both their averaging period and their averaging method are presetable independently of
standard average values evaluation setting.
The averaging method can be of fixed or floating window type ( see below ). The active power demand
averaging period can be set in range from 1 to 60 minutes.
The instrument separately records single-phase and three-phase maximums of these active power
demands and the related date & time. The maximum value of 3-phase power reached during current
month ( 3PMAX-CM ), last month ( 3PMAX-LM ) and total maximum value ( 3PMAX-TOT ) reached since last
clearing including their time stamps are registered.
Recorded maximum values can be cleared, date&time of the last clearing is registered.
3.5.4.3 Setting
Main parameters determining electricity meter unit function can be set manually at the
SMP/SMPQ instruments.
Fig. 3.17 : SMP/SMPQ
electricity meter setting
By selecting appropriate icon a Setting – Elmeter window appears.
Record period is an automated meter reading interval that defines
how often the electricity meter state is stored into the memory. The
electricity meter history can be later downloaded into a PC and
analysed.
Actual tariff can be controlled either by actual local time using the
tariff zones table or by a digital input. In case of table selection, a day
long timetable for 3 different tariff selections with hourly resolution
can be defined.
In case of digital input selection, the digital input specifies actual tariff – open state means tariff 1,
closed state tariff 2. Tariff 3 is not used at this case.
Tariff zones table can opened and set by selection of Tariff zones option.
40
SMV / SMP / SMVQ / SMPQ
Finally, electricity meter group maximum power demand averaging parameters can be specified.
These are the only parameters that can be set at the SMV instruments too ( P.07/2, P.07/3 ).
3.5.4.4 SMV/SMVQ Instrument Energy Presentation
Although internal electricity meter data are processed in the same way at all types of instruments, their
presentation on the instrument's display differs due to its different character.
At the SMV instruments, navigate to En1p window or En3p window using the ▲or ▼button to view
single-phase or three-phase energies, respectively ( see navigation chart on Fig. 2.2 ).
Fig. 3.18 : SMV/SMVQ instrument electricity meter presentation
SMV 44
VLL
VLN
A
W
var
VA
PF
cos
126.7
119.3
139.2
SMV 44
k
En1p
En3p
PavgE
VLL
avg
VLN
max
.
A
W
min
M
time
var
VA
PF
cos
THD
har
m
inst.
I/O, Err
I
007
2953
51.65
inst.
avg
k
min
time
THD
k
har
m
M
En1p
En3p
PavgE
USB
Hz,C
max
.
M
I/O, Err
I - 2
k
M
USB
Hz,C
Single-phase energies ( En1p ) are displayed at 4 decimal places with a floating decimal point. The
left example in Fig. 3.18 shows that single-phase energy of phase L1 has the value of 126,7 GWh
( shining LED k and M , equalling G ). This is the active energy in quadrant consumption = import
( indicated with letter I in the fourth row ), overview of all tariff zones. Using the buttons ►and ◄,
energies in other quadrants can be displayed ( E = exported active energy, L = imported reactive
energy - inductive, C = exported reactive energy – capacitive ). The last window ( shining LED time
and in the fourth row indication Clrt ) shows the date & time of the last reset of the electricity meter.
Three-phase energies ( En3p ) are displayed in different ways: at 11 significant figures ( 9 before and
2 behind the decimal point ) across 3 rows of the display. The decimal point is fixed – displayed in
kWh/kvarh, MWh/Mvarh, possibly GWh/Gvarh. The right example in the figure shows that the status of
the three - phase energy of the quadrant import ( I – 2 ) is in the second tariff zone ( I – 2 )
7295351,65 kWh. Using the buttons ►and ◄ energies in the other quadrants can be displayed, i.e.
in particular tariff zones ( 1, 2, 3 ), and summary of all the zones ( S ). The last window again shows
the date & time of the last reset of the electricity meter.
The electricity meter reading can be reset at the beginning of the monitored period, either manually or
by a connected PC. Manual reset ( common to En1p and En3p ) is executed, when the specification
„time" is displayed, by simultaneously pressing the ►and ◄ buttons ( old value of date/time starts
flashing ) and the confirmation with the button ▼ ( pressing different buttons will not reset the
counters ). If the instrument is locked, manual resetting is not possible.
3.5.4.5 SMV /SMVQ Instrument Maximum Active Power Demand Presentation
Active power demands are processed with the preset averaging method and the averaging period as
set in parameters P.07/2 and P.07/3, respectively. Values of the demands can be monitored in the
window PavgE at displayed LED inst– these are the „instantaneous" values of the demands. By the
principle of evaluation these „instantaneous" values update rate depends on a preset averaging
period.
The maximum registered values ( total values reached since last clearing only - P1MAX-TOT , P2MAX-TOT,
P3MAX-TOT and 3PMAX-TOT ) can be monitored in the second window of the quantity PavgE ( LED max. ),
and the occurrence time and date of the three-phase maximum demand in another window ( LED
max. and time ). The last window shows the time and date of last clearing the maximum demands –
41
SMV / SMP / SMVQ / SMPQ
this specification is identified by indication Clrt in the fourth row. Recorded maximum values can be
cleared in a similar way as the energies.
The entire information, including occurrence times of the phase maximum demands, can be obtained
from the PC – see ENVIS program manual.
3.5.4.6 SMP/SMPQ Instrument Energy Presentation
Electricity meter energy data are situated in a separated window, which is accessible via
the main menu ( see navigation chart on Fig. 2.3 )
Fig. 3.19 : SMP/SMPQ
As default actual three-phase ( 3p ) energies registered since last
electricity meter – energy
clearing up to now ( total ) for all tariff zones ( Σt ) appear : imported
window
active energy ( I ), exported active energy ( E ), imported reactive
energy ( = inductive, L ) and exported reactive energy ( capacitive,
C ), as shown on the uppermost screen of Fig. 3.10.
With the ◄ button outline of registered energies for individual tariff
zones can be listed ( 2nd screen ).
With the ►button, single-phase energies can be displayed using 1p
↔ 3p toggle switch ( 3rd screen ). In this case you can select
energies of individual phases L1, L2, L3 with the ◄ button or display
overview of both single-phase energies and three-phase energy in
specified quadrant, for example imported active energies with
Active-Import option, as shown on the 4th screen.
Besides the total energies (that means energy values registered
since last clearing up till now ), state of registered values at the end
of previous month can be viewed with Act.↔ Last Month toggle
switch of the ►button ( 5th screen ). The last month window is
indicated by the month specification, for example 2009/4 , which
means March of year 2009.
Finally, registered energies can be recalculated using preset tariff
rates to money values in Euros with kWh↔EUR toggle switch.
Tariff zones and appropriate Euro tariff rates can be set via a
communication link using a PC with ENVIS program.
Energy counters can be cleared either manually or with a remote PC.
Manual clearing can be invoked with the ►button by Clear option
and confirmed with the button.
3.5.4.7 SMP/SMPQ Instruments Maximum Active Power Demand Presentation
While in the electricity meter energy window you can switch to the maximum active power demand
window with the ▼or ▲button.
Fig. 3.20 : SMP/SMPQ
maximum active power
demand window
Only three-phase maximums with their time stamps are displayed. In
the first row there is maximum power demand reached during last
month ( 3PMAX-LM ). The “M03”- index on the figure indicates the month –
March.
In the 2nd row there is a current month ( 3PMAX-CM ) maximum, that was
reached since the beginning of current month ( April ) up till the actual
42
SMV / SMP / SMVQ / SMPQ
local time. This value is temporary and can change until the end of the month. After the next month
starts this value is rewritten to the last month ( 3PMAX-LM ) data.
Total maximum active power demand reached since last maximum clearing ( 3PMAX-TOT ) is in the 3rd
row. You can check this clearing time with the ►button – by Clear option selection, the clearing
confirmation window appears and last maximum power demand clear time and current averaging
parameters setting can be checked. If you don't want to clear the registered maximums , push the
button, otherwise the  button.
The entire information, including phase maximum demands, can be obtained from a PC with ENVIS
program – see chapters below.
3.5.5 Power Quality
3.5.5.1 Power Quality Evaluation
The SMVQ/SMPQ instruments feature an additional power ( voltage ) quality evaluation unit. The
evaluation principle is designed in compliance with the European standard EN 50160. Following
quantities are processed :
Tab. 3.9 : Power Quality Unit Processed Quantities
quantity mark
f
U1, U2, U3
unbU
Uxh1 ,Uxh2 ,Uxh3
THDU1 ,THDU2 ,THDU3
Plt1, Plt2, Plt3
quantity
power frequency
voltage magnitude
voltage unbalance
voltage harmonics
voltage Total Harmonic Distortion
flicker severity
note
95% and 100% time values
95% and 100% time values
95% and 100% time values
x... harmonic order in range 2÷50
All of the quantities are continuously checked and compared with predefined limits and time statistics
of fulfilled /not-fulfilled conditions is created. At the end of a week the duration of fulfilled conditions of
each processed quantity is calculated and classified as „passed“ of „not-passed“.
Although the power quality limits are preset as the EN 50160 defines, they can be modified using a PC
with ENVIS program.
3.5.5.2 Power Quality Presentation
Fig. 3.21 : Power quality
windows
A PQ archive consists of weekly records as shown on top screen of
the figure on the left. Each of the record is identified with a date of the
starting day (Monday) of the week.
Following symbols indicate power quality evaluation results :
… passed - quantity conforms to preset limits ( in all lines ( or
phases) where applicable )
… not-passed - quantity doesn't conform to preset limits ( for f and
unbU , which are not evaluated separately for each line )
… not-passed in specified phases - quantity doesn't conform to
preset limits in specified lines (phases) only - the specified lines are
indicated with Roman numerals ( phases L2 and L3 in this case )
… in progress - quantity processing in progress, not yet finished
43
SMV / SMP / SMVQ / SMPQ
… undefined - if flicker (Pst,Plt) aggregation parameters setting is not in compliance with EN 50160
standard, this power quality category cannot be evaluated and the wrench symbol is displayed
The PQ archive record list has depth of one year.
A more detailed view of each weekly record can be also used. To investigate a particular record,
navigate to it with the ▲and ▼buttons and select with the
(zoom) button. At the detailed
window ( bottom screen ) particular durations of compatibility with predefined limits in percents of
investigated week are displayed.
Further details can be obtained and power quality limits can be modified from a PC using ENVIS
program.
3.5.6 Record Blocking
The instruments are primarily designed for fixed installation. In such applications, neither data
recording nor electricity meter operation need to be blocked - they must run permanently and
continually.
But in some special cases they can be used as portable instruments and they require to be
connected/disconnected before/after measurement. In order to avoid unwanted periods recording
when the instrument is running but not properly connected to measured grid ( during instrument setup
and installation/deinstallation ), it is possible to block both data to archive recording and electricity
meter operation temporarily.
As default, the Record Blocking Control parameter is switched off. In such case, the recording runs
permanently according the record setting ( Waiting for recording start when Recording Start Time is
activated, which is indicated with the
indicator, is the only exception. The electricity meter
operation is not influenced by this ).
As soon as the Record Blocking Control is activated ( you can do this in record setting via instruments
communication interface only using a PC ), data into archives recording and electricity meter operation
can be blocked or unblocked. The record & electricity meter blocking status can be checked by newly
emerging icon :
… indicates that record & electricity meter are unblocked ( normal operation of instrument )
… indicates that record & electricity meter are blocked
After the icon selection, you can block or unblock them. One of following dialogues appears :
Confirm state change with the  button. You can do this operation more comfortably from connected
PC via the communication interface too.
After the record & electricity meter are blocked, the instrument behaviour changes as follows :
• blocking operation information is registered in the Log archive
•
data recording into all archives but the Log is cancelled
•
power quality and voltage events evaluation are frozen
•
electricity meter state is frozen
44
SMV / SMP / SMVQ / SMPQ
•
if digital outputs operation is set as impulse, their state gets frozen
•
the instrument starts to signal the blocked state with the
indicator in actual data window
That means that all of archives state ( but the Log ) and the electricity meter get frozen only – their
content stays unchanged. After being unblocked, archive recording and electricity meter operation are
restored again.
3.6 Inputs & Outputs
Instruments can be optionally equipped with a combination of outputs and inputs. A summary of
possible variations is stated in chap. 3.2 and connection examples at the end of this manual.
Following inputs & outputs are available :
•
two digital outputs – relay ( electromechanical, R ) or impulse (solid-state, I )
•
one digital input
•
one analog input ( a.i. )– either 20 mA current loop type ( A ) or Pt100 temperature sensor
input ( T )
Furthermore, all of instrument models feature two “alarm ” LEDs – A1 and A2 - for indication of
various states, that can be considered as other special digital outputs. Function of these LEDs can be
set in the same way as at standard digital outputs.
The behaviour of digital outputs can be programmed according to requirements as :
•
standard output , e.g. as a simple two-position controller or a defined status indicator
•
transmitting electricity meter impulse output
•
remote controlled output ( by an external application via a communication link )
The digital input can be used for :
•
state monitoring
•
time synchronization
•
electricity meter tariff control
The analog inputs are evaluated, displayed and optionally registered similarly as other measured
quantities.
3.6.1 Inputs & Outputs Connection
Digital inputs & outputs are connected to terminals on a rear panel of an instrument according to the
following table.
Tab. 3.10 : Connection of digital inputs & outputs
terminal
O1+
O1O2+
O2I+
I-
SMxxx RR
relay output No. 1
relay output No. 1
relay output No. 2
relay output No. 2
digital input +
digital input -
signal
SMxxx RI
relay output
relay output
impulse output +
impulse output digital input +
digital input 45
SMxxx II
impulse output No. 1 +
impulse output No. 1 impulse output No. 2 +
impulse output No. 2 digital input +
digital input -
SMV / SMP / SMVQ / SMPQ
3.6.1.1 Relay Output Connection
A SPST-NO ( single-pole, single-throw, normally open ) relay type is used. The relay can be loaded by
both AC and DC current ( see technical specifications ).
3.6.1.2 Impulse Output Connection
Impulse outputs are accomplished by a semiconductor switching device. It is assumed that the input
optocouplers of the external recording or controlling system will be connected to these outputs via
current–limiting resistors. The outputs are mutually galvanically separated from internal circuits of the
instrument. It is necessary to observe the polarity when connecting.
3.6.1.3 Digital Input Connection
The digital input is not galvanically separated from the internal circuits of the instrument; the - terminal
is internally linked with the PE terminal. Therefore, it is required for the relay, switch or optocoupler
operating this input, to be placed as close to the instrument as possible (optimally in the same box)
and to minimize the length of the supply conductors (maximum about 2 - 3 m).
If the closing element is a transistor (NPN) or optocoupler, it is necessary to observe the polarity when
connecting - the transistor or the optocoupler collector must be connected to the + terminal, and the
emitter to the - terminal.
3.6.1.4 Analog Input Connection
Analog input ( a.i. ) is connected to terminals A+, A- ( type „A“ - 20 mA current loop ), respectivelly T1,
T2 ( type „T“ - Pt100 temperature sensor ).
The 20 mA current loop ( A-type ) input is passive, i.e. active signal source ( or a source with auxiliary
power supply ) is required. Proper polarity of the current loop signal must be kept.
The temperature input ( T-type ) is designed for connection to a resistive temperature Pt100-type
sensor. Because of the two-wire connection the sensor cable loop impedance must be as low as
possible ( each 0.39 Ohms means additional measurement error of 1 ºC ). The temperature sensor
can be ordered as the instrument’s optional accessory.
Similarly, as the digital input, the analog input is not galvanically separated from the internal circuits of
the instrument; the A- , resp. T2 - terminal is internally linked with the PE terminal. Therefore, it is
required to minimize the length of the supply conductors to 3 m.
3.6.2 Inputs & Outputs Setup
Adjusting the function of inputs and outputs can be accomplished in ENVIS program via connected PC
( see ENVIS program manual ).
Digital outputs ( including alarm LEDs ) function can be set either as standard output or as electricity
meter impulse output. If the RCS – module (see below) installed in the instrument you can set the
RCS-telegram indication with the RCS option as well.
3.6.2.1 Digital Output Setup – Standard Output
Fig, 3.18 describes standard digital output operation. For complete output setup, following functions
need to be set :
•
input events
•
output control formula
•
output type
3.6.2.1.1 Input Events
Each of four input events can be preset independently. An event type can be preset as :
•
control quantity size
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•
instrument state
•
permanently inactive ( 0, false )
•
permanently active ( 1, true )
Fig. 3.22 : Standard digital output setup
3.6.2.1.2 Control Quantity Size Event
At control quantity size event, the quantity size is compared with preset limit which results in the event
state. For this, the following parameters must be preset :
•
control quantity … one of measured quantities
•
control quantity type … specifies if an actual or an average value of control quantity is used
•
control quantity phase … desired phase(s) values or 3-phase value can be selected
( applicable for phase character quantities only )
•
limit size … limit value of the control quantity at which the event state changes
•
limit hysteresis … defines the insensibility range of the event state
•
control quantity deviation polarity … if the event state gets active over the limit or below the
limit
•
event state change blocking time … defines minimum time for the even state change
The function is shown on Fig 3.23. The quantity that controls the event state ( control quantity ), can
be chosen according to Tab. 3.24. Furthermore, it is necessary to define, how to control the event
status by the chosen control quantity. Thereby the other parameters are used.
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SMV / SMP / SMVQ / SMPQ
Fig. 3.23 : Control quantity size event function
Control
quantity
[% nom. v]
limit + hysteresis
100
preset limit
80
limit - hysteresis
60
40
20
0
Event
state
t < tBL
tBL
t < tBL
tBL
t < tBL
tBL
Event inactive state
Event active state
Tab. 3.24 : Limit and hysteresis specification
control quantity
ULL, ULN
I
PF
φ
P, Q, S
3P, 3Q, 3S
THDU, THDI, unbU
f
analog input quantity
T
phase order
limit size and limit hysteresis specification
in percent, UNOM ~ 100 %
in A
in percent, 1,00 ~ 100 %
in angle degrees
in percent, PNOM / 3 ~ 100 %
in percent, PNOM ~ 100 %
in percent
in Hz
in percent, value at 20 mA ~ 100 %
in °C
in percent, forward ~ 100% ( reverse ~ 0 % )
The control quantity type can be selected from the list, which generally includes individual phase
values, their logical disjunction and logical conjunction and three - phase value, if appropriate:
•
•
•
•
•
•
•
L1
L2
L3
N
At least one of L1, L2, L3
All L1, L2, L3
3-p
The control quantity deviation polarity for the event active state can be set either over the limit or
under the limit.
The limit size and the limit hysteresis can be entered either in percentages of the preset nominal value
or directly in the control quantity units. Specification of the values is mentioned in the table. For the
correct operation in case of the values percentage expression, the nominal voltage UNOM and the
nominal power PNOM must be adjusted properly in the instrument (see chapter Nominal Voltage UNOM
and Nominal Power PNOM ).
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SMV / SMP / SMVQ / SMPQ
Depending on the control quantity character the limit size can be entered including the sign.
Quantities that can be negative ( active ( P ) and reactive ( Q ) powers, fundamental harmonic U to I
phasor angle ( φ ), analog input quantity ( a.i. ) and temperature ( T ) ) are compared with the limit
including their signs.
The same proportion as control quantity also applies to hysteresis, which can adjust the event status
insensitivity. If the controlling quantity varies in the zone of values [(limit - hysteresis), (limit +
hysteresis)], the event status does not change.
Furthermore, the event status insensitivity to quick changes of the control quantity can also be set by
so - called blocking time. Subsequently, the event changes its status only ,if the value of the control
quantity stays continuously above or under the defined limit( including hysteresis ) at least for the
adjusted blocking time.
3.6.2.1.3 Instrument State Event
With the instrument state event, output behaviour can be controlled by the instrument state, various
single-shot events or digital input status.
Following instrument states are supported :
•
digital input closed … This state has value 1 ( active ) if the instrument digital input is closed.
If open its value is 0 ( inactive ).
•
instrument initialization … This state gets value 1 ( active ) as soon as the instrument is
restarted, usually when powered on ( or restarted by operator command or by a remote PC).
After the first output control formula evaluation (explanation follows below) it gets back to 0
( inactive ).
•
instrument error … This state is controlled by the instrument error code . It gets value 1
( active ) when non-zero error code value. If the error code equals to zero value, the state
value is 0 ( inactive ).
•
instrument main archive full … If main archive memory buffer gets full, recording into the
buffer continues from the beginning ( cyclic buffer ). This state is indicated with value 1
( active ), otherwise it equals to 0 ( inactive ).
•
memory card ejected … If a uSD-memory card slot is empty this event has value 1 ( active ).
As soon as a card inserted it gets 0 ( inactive ). Applicable for instruments equipped with the
uSD-card slot only.
•
instrument setup change … This state gets value 1 ( active ) as soon as the instrument setup
is changed, either manually by operator or by local or remote link command. Immediately
after the next output control formula evaluation it gets back to 0 ( inactive ).
•
instrument electricity meter clear … This state gets value 1 ( active ) as soon as the
instrument electricity meter state is cleared, either manually by an operator or by a local or
remote link command. Immediately after the next output control formula evaluation it gets
back to 0 ( inactive ).
•
power quality event … This event is controlled by the power quality evaluation unit (
SMVQ/SMPQ instruments only ). As soon as the power ( voltage) quality out of preset ranges
detected, the value of the event gets 1 ( active ). Immediately after the next output control
formula evaluation it gets back to 0 ( inactive ).
•
voltage event … This event is controlled by the voltage event unit ( firmware plug-in modul ).
As soon as a new voltage event is detected, the value of the event gets 1 ( active ).
Immediately after the next output control formula evaluation it gets back to 0 ( inactive ).
When desired instrument state selected, its polarity can be set too ( direct or negated ).
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Note : The instrument states assortment is subject to the upgrade and change in further firmware
versions.
3.6.2.1.4 Permanent State Event
For all unused events their values can be set either as permanently inactive or permanently active.
3.6.2.1.5 Output Control Formula
Actual states of all preset events described above are processed each measurement cycle ( = 10 / 12
mains cycles, i.e. 200 ms at 50 / 60 Hz ) and so called output control formula is evaluated :
output control = (event1 O1 event2) O2 (event3 O3 event4)
where :
output control ...logic result of the output control formula
event1 ÷ event4 … actual logic state of input events 1 ÷ 4
O1 ÷ O3 … logic operators, presetable to either OR or AND
A physical output state is driven by the output control status according to a preset output type ( see
below ).
3.6.2.1.6 Output Type
Actual value of the output control status and preset output type specifies physical output behaviour.
Following output type parameters can be set :
•
output active state … Defines output state polarity when the output control status value is 1
( active ). Can be set either to on ( output switch is closed ) or off ( open ).
•
output character … Can be set either as permanent or pulse. If set to pulse , the pulse signal
parameters must be set :
•
•
pulse signal period … period ( in ten / twelve mains cycles resolution )
•
pulse active state duration … duration of the active state ( defined with the output
active state parameter ) part of the pulse signal ( duty of the signal ). The preset
value must be lower than the pulse signal period .
output trigger … If set to level-activated , the output is continuously controlled by actual
output control value. On the contrary, if set to slope-activated , the output gets to preset
active state when the value of the output control status changes from inactive ( 0 ) to active
( 1 ) state only. In such case another parameter should be set :
•
active state auto-off time … duration of the active state after being triggered. Time
from one second up to one week can be set. When preset time expires the output
reverts back to inactive state. If this parameter is set to never , the output after being
triggered stays in active state continually. The only two ways to switch it off are
either the output setup change or the manual output clear ( from the I&0 setting
submenu at SMP/SMPQ instruments ).
3.6.2.2 Digital Output Setup - Impulse Output
Besides the standard digital output function any of digital outputs or alarm LEDs can be set as
transmitting electricity meter. The frequency of generated impulses can be set depending on values of
measured electric energy by the embedded electricity meter unit.
Firstly, the type of electric energy can be selected:
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SMV / SMP / SMVQ / SMPQ
•
active energy consumed ( import )
•
active energy supplied ( export )
•
reactive energy consumed ( inductive )
•
reactive energy supplied ( capacitive )
Secondly, it is required to adjust the frequency of the impulses per kWh ( or kvarh ).
Every 5 seconds the instrument executes an evaluation of the measured electric work. If the
increment of recorded electric power is higher or equal to the quantity of power per one impulse, the
instrument will implement the transmission of one, or if needed, several impulses. The mentioned
description shows that at higher frequency of impulses, their transmission is not continuous, but
comes in pulse bursts every 5 seconds.
The impulse output signal is in compliance with so-called SO-output definition.
3.6.2.3 Digital Output Setup – Remote Controlled Output
When set in this way, the output state can be controlled by an external application ( program ) via the
communication interface ( for example by a web browser ). Detailed information can be found at the
remote communication link protocol manual.
3.6.2.4 Digital Input Setup
In case the digital input is used for time synchronization, clock setting parameters need to be set
properly – see Clock setting chapter.
In case the digital input is used for the electricity meter tariff control, follow the Electricity Meter Setting
chapter instructions.
3.6.2.5 Analog Input (A) Setup
For 20 mA current loop input ( A-type ) following parameters can be preset :
•
analog input quantity name … quantity name ( text string )
•
analog input quantity unit name … quantity unit name ( text string )
•
analog input quantity value for 20 mA input current … quantity signal range upper limit
•
analog input quantity value for 4 mA input current … quantity signal range lower limit
3.6.2.6 Temperature Input (T) Setup
You cannot set the T-type input from the instrument panel anyway. The only presetable parameter –
the temperature offset – can be set in the ENVIS-DAQ program only. With it the temperature cable
resistance influence can be eliminated if required.
3.7 Additional Firmware Modules
For special measurements, instruments can be optionally equipped with additional firmware modules:
•
VE ... voltage events module (Voltage Events)
•
RCS ... ripple control signal module (Ripple Control Signal)
•
GO … oscillogram record module (General Oscillograms)
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SMV / SMP / SMVQ / SMPQ
The SMVQ / SMPQ come including the VE module as default; other modules must be specified when
ordering separately. The modules can be purchased and installed into the instrument at a later stage.
3.7.1 VE Module - Voltage Events
The module enables registration and evaluation of voltage dips, swells and interruptions.
3.7.1.1 PQ-Voltage Events Evaluation
Voltage events are mostly unpredictable rapid voltage changes, caused by switching operations, load
disconnections and faults occurring in the public network or in the network users’ installations.
Voltage events are processed in compliance with IEC 61000-4-30 ed.2 standard. The elementary
evaluation unit is the r.m.s. value of voltage measured over 1 cycle, refreshed each half-cycle
(Urms(1/2)). These values are evaluated continuously on all phases L1 ÷ L3 ( inputs U1, U2 and U3).
For the event detection preset nominal voltage of the mains ( UNOM ) is used. Therefore, the correct
setting of the parameter is essential for a proper event evaluation ( see Setting-Installation group of
parameters at SMP/SMPQ instruments; at SMV/SMVQ instruments the parameter can be set via a
communication link using ENVIS program).
Three types of voltage events are evaluated :
•
dips
•
swells
•
interruptions
Set limits for the voltage events classification can be viewed and modified only via the communication
line in the master PC using the ENVIS-DAQ program. Following picture shows the voltage events
settings window (Configs / PQ Settings / Voltage Events), where default setting is evident :
Fig. 3.24 : Voltage events – Setting in the ENVIS-DAQ program,
default values
Every detected event is saved into the circular buffer including time stamp, duration and minimum or
maximum Urms(1/2)-voltage registered during the event. The buffer depth is in hundreds thousand
events.
Detection of a voltage event can be used as one of triggering condition for oscillogram registration;
then limited number of events can be recorded in a oscilloscope-like shape (called PQ-oscillogram or
PQ-general oscillogram - see below).
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SMV / SMP / SMVQ / SMPQ
3.7.1.2 PQ-Voltage Events Presentation
Voltage events can be viewed either at instruments display ( SMP/SMPQ instruments only ) or on a
remote PC using ENVIS program.
Due to SMP/SMPQ instrument's limited display space and resolution, only the basic event information
is available. The full voltage event presentation is available after downloading of data onto a PC at
ENVIS program.
Fig. 3.25 : Voltage events
At the SMP/SMPQ instruments, voltage events can be viewed at actual values group using actual
values display mode switch (
, see Fig. 2.3 ) by selection of option
. As default graphic
representation of registered events in form of so-called ITIC ( CBEMA ) graph appears – Fig. 3.11 on
the left.
Individual events are classified according its magnitude and duration. On the graph each event is
represented as a cross. The graph area is divided into three sections according to event importance
and influence – „prohibited“ section ( the upper), „no-influence“ section ( the middle ) and „nodamage“ section ( the bottom ).
With the ▲and ▼buttons you can list between three-phase ( 3p ) events and individual single-phase
( L1 ,L2 ,L3 ) events.
With the ►button you can switch to numeric representation using Graph ↔123 option. Each number
in the table represents a number of events of appropriate magnitude and duration detected. The tables
are separated to dips/interruptions ( PQ events < ) and swells ( PQ events > ) and you can list
through them with the ►and ◄ buttons.
As default, events occurred during last 7 days only are displayed, which is indicated with 7d string.
Optionally you can select time period you are interested in with the ►button in range from 1 hour (
Last 1 h ) up to 6 moths ( Last 6 mon ).
3.7.2 RCS Module – Ripple Control Signal
With this module ripple control signal level of preset frequency can be measured and corresponding
pulse codes can be recorded.
3.7.2.1 RCS Evaluation
Using the DFT algorithm, level of URC signal of preset frequency fRC of chosen phase voltages is
continuously evaluated. Evaluation period is 0.1 second.
When preset URC limit is exceeded the instrument detects incoming pulse code type and records the
telegram in form of map of pulses including the time and date of the beginning of the telegram to a
separate archive with a depth of more than 10,000 items. Simultaneously, the level of the telegram
voltage and appropriate phase voltage at the telegram starting pulse are registered (see below).
If RCS oscillograms recording is set, the telegram in oscillogram form is recorded too. But the capacity
of such oscillograms is limited to the last 20 only.
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SMV / SMP / SMVQ / SMPQ
3.7.2.2 RCS Processing Setting
In the Settings menu, select appropriate icon and the RCS Setting window appears.
Fig. 3.26 : RCS Setting
Window
In the window, you can set the following parameters:
• Pulse Code Type ... defines the format of received telegrams.
Eg. when setting ZPA-II, only the ZPA-II and ZPA-IIk ("Short II")
type telegrams will be detected and its individual pulses will be
appropriately interpreted. Other formats will interpret incorrectly or
marked as an unknown type (???). The current range of recognized
telegram formats is available from the manufacturer.
• fRC … the RCS frequency. You can either select one of the most
commonly used frequencies from the list or - after the Custom option selection - specify its
value in the range 170 ÷ 1500 Hz
•
URC Limit ... RCS signal threshold level. Only when the RCS level exceeds the limit the
instrument starts to detect and record incoming RCS telegram.
•
L1, L2, L3 ... phases in which the RCS signal will be evaluated
•
Oscillogram Recording ... if it is on, not only the standard RCS telegram pulse maps but
RCS oscillograms too are recorded.
3.7.2.3 RCS Signal and RCS Telegram Visualization
Measured RCS signal can be viewed in separate windows accessible through the main
menu.
After selecting appropriate icon the actual RCS signal window appears – depending on phases
processed (see above), for example, actual URC1signal of the L1 phase. If RCS processing in more
phases set you can browse through the URC2 and/or the URC3 signal windows with ▲,▼buttons too.
Actual signal windows are marked with act string under the quantity name.
Fig . 3.27 : RCS Signal
Actual Window
Usually, the RCS telegrams are transmitted occasionally only, typically a
few units to tens of telegrams per hour. Between the transmissions
network is without RCS signal and the instrument measures signal noise
only of magnitude of few tenths of volts (if the measurement is performed
on a low voltage network), as shown on the left above. The graph shows
the waveform for the last 10 seconds. At left below the quantity name,
the maximum URC value of the area shown is typed. In the lower left
corner you can check the URC limit (in this case 1.0 V) and the fRC
frequency (183 Hz). The URC limit is shown by a dashed line in the graph
too ( but the scale of the vertical axis dynamically adapts to the URC
maximum level and the level of 1.0 V in this case is outside the displayed
area).
The situation at the arrival of the RCS telegram is shown in the figure
below. The URC maximum level in the viewing area is 2.71 V now.
According to the length of the starting pulse and the subsequent security gap the telegram type was
identified as ZPA II-k, which is evident from the data below the set limit. In the graph the URC limit
level is evident now.
Regardless of the RCS telegram record setting received telegrams are also stored into the RCS
display archive. The archive has capacity of 15 telegrams and it is cyclic, so it contains the last 15
telegrams at maximum.
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SMV / SMP / SMVQ / SMPQ
The RCS display archive content can be viewed on the display in form of a table with a map of pulses
and other telegram data. This "table" view can be switched with the Table option by repeatedly
pressing of the ►button.
In the header after the phase specification, the telegram order number of the last 15 telegrams
recorded is typed. You can browse among them using the ▲, ▼buttons.
Fig. 3.28 : RCS
Telegram
In each of telegram window there are displayed:
•
telegram type and fRC frequency
•
time and date of the beginning of the telegram
•
pulses map (shown only so much of pulses that can fit on 2
lines)
•
telegram levels : ↑=URCMAX, ↓=URCMIN , URCAVG
•
ULN voltage at the beginning of the telegram
You can switch to the graphical view with the
button. The
telegram view window length is 14 second and can by shifted with
►and ◄ buttons. Actual position of the window in seconds is under it.
At the left side, under the quantity name ,following data are :
•
↑URCMAX … URC maximum value measured during the start pulse and the pulses evaluated as
"1"
•
↓URCMIN … URC minimum value measured during the start pulse and the pulses evaluated as
"1"
•
URCAVG … URC average value of the start pulse and the pulses evaluated as "1"
You can switch back to the telegram main window by pressing the
button.
The RCS display archive can be cleared by selection the Clear option with the ►button repetitive
pushing. The main RCS archive is not affected by this.
3.7.2.4 RCS Telegram Reception Indication with the A1/A2 LEDs
With the output settings (see description above) you can set a LED function to not only standard or
pulse but to the RCS too. In this case, the LED will function as follows:
•
if the RCS Display Archive empty or no RCS-telegram received since the last instrument
powerup and no telegram reception in progress, the LED is off
•
if at least one RCS-telegram received since the last instrument powerup and no telegram
reception in progress, the LED is on
•
if a telegram reception in progress, the LED flashes
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SMV / SMP / SMVQ / SMPQ
3.7.2.5 RCS Signal and Telegram Viewing in the ENVIS Program
You can observe recorded telegrams with much greater comfort after transferring into the ENVIS
program. Detailed description can be found in the manual of the program.
Fig. 3.29 : RCS Telegrams View in the ENVIS Program
3.7.3 GO Module – General Oscillograms
The module allows to record long stretches of selected voltage and current signals in a „scope“ shape.
This feature can be useful for analyzing and identifying causes of short-term events or faults in the
network, in control of inrush currents, etc.
Both record setting and display of recorded data are possible only in the master PC using the ENVIS
program.
Features of this module are described in following chapter.
3.8 Transient Recording
In addition to periodical recording of measured quantities, it is possible to record random transient
events in the network. Records can be implemented in two ways:
•
Event trend ... continuous sequence of the Urms(1/2) or the Irms(1/2) values of a specific length
•
Oscillogram ... continuous sequence of the Ui or the Ii instantaneous values (samples) of a
specific length
Both the event trends and the oscillograms record setting and visualization are possible only in the
master PC using the ENVIS program. The difference between the two types of records are evident at
following figures :
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SMV / SMP / SMVQ / SMPQ
Fig. 3.30 : Event Trend
Fig. 3.31 : Oscillogram
Event trend and oscillogram recording are usually activatedsimultaneously by a trigger event that
occurs whenever so called trigger condition is fulfilled. Each event trend / oscillogram consists of two
parts:
•
pretrigger part ... signal waveform of certain length before the moment of the trigger
condition fulfillment
•
posttrigger part ... seamless signal waveform of certain length ( after the moment of the
trigger condition fulfilment )
3.8.1 PQ-Event Trends and PQ-Oscillograms
The SMV / SMP instruments equipped with standard firmware support neither event trends nor
oscillograms; only the SMVQ / SMPQ instruments can be used for so called PQ- event trends and
PQ-oscillograms recording. These records have a fixed structure:
•
•
PQ-event trend:
•
pretrigger length 0.2 sec
•
posttrigger length 6 sec
PQ-oscillogram:
•
sampling 32 samples / period
•
pretrigger length 0.2 sec
•
posttrigger length 6 sec
The PQ-event trend and the PQ-oscillogram are recorded always as soon as the preset trigger
conditions is met ( single-shot, see description below). Recording capacity is 20 pairs of voltage and
current PQ-event trends of the same phase and 10 pairs of voltage and current PQ-oscillograms of the
same phase.
If the GO firmware module installed the PQ-event trends and PQ-oscillograms recording is not
possible; instead you can use so called PQ-general oscillograms recording.
3.8.2 PQ-General Oscillograms
For so called PQ-general oscilograms recording the GO additional fiirmware module must be
installed in the instrument. The module can be installed into any instrument model.
Unlike the PQ-oscillograms, the PQ-general oscillograms recording is fully variable:
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SMV / SMP / SMVQ / SMPQ
•
adjustable sampling rate 32/64/128 samples per cycle
•
individual selection of U and I signals to be recorded
•
adjustable trigger method : single-shot / multi-shot / level (described in the next chapter)
•
longer pretrigger part :
Shared memory of fixed capacity is allocated for pretrigger parts of all set signals U and I. At
sampling rate 32 samples / cycle, for single recorder signal (U or I) the pretrigger length
corresponds to 12 seconds. Analogously, at 128 s/c sampling the pretrigger length drops
down to 3 seconds. When you set all eight signals recording at 128 s/c sampling the
pretrigger parts will be 0.375 sec long only.
•
adjustable posttrigger part length
•
adjustable instrument memory for oscillogram archive allocation at expense of other archives
to achieve high archive capacity
3.8.3 Event Trend and Oscillogram Triggering
The data structures recording can be triggered both by control events and their control formula
( general triggering ) and by deviation of size or shape of selected voltage and current signals ( wave
change triggering ).
3.8.3.1 General Triggering
General triggering of event trend & oscillogram records is defined, similarly as instrument output
control, by trigger event setting. Method for setting and evaluation of trigger event is entirely consistent
with the description given in the chapter Inputs & Outputs Setup above, so there can be defined up to
4 control events and their control formula. Output of the formula is value of the trigger event: logical
state "0" or "1".
PQ-event trends and PQ-oscillograms are recorded whenever trigger event value changes from "0" to
"1" ( so called single-shot trigger ).
PQ-general oscillogram record triggering can be set, besides the above described single-shot
method , to so-called multi-shot or level-controlled method too. Further details can be found in the
relevant section below.
3.8.3.2 Wave Change Triggering
Regardless of the general triggering setting, you can simultaneously set record starting by voltage
waves change.
The instrument continuously evaluates size and shape of each period of selected voltage signals.
Event trend and oscillogram record can by triggered when :
•
the RMS value of a voltage period (= one wave) changes from that of the previous period by
a value greater than preset threshold
•
a deviation between size of corresponding samples of actual and previous period that is
greater than preset threshold is detected ( i.e. wave shape change occurred)
3.8.3.3 PQ-General Oscillogram Record Triggering Methods
For PQ-general oscillograms record triggering, one of three methods can be used :
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SMV / SMP / SMVQ / SMPQ
•
Single-Shot Triggering
Recording is started whenever the trigger event is "activated" (i.e. its value changes from "0"
to "1"), or when a voltage wave change is detected. Each recorded oscillogram has the same
length, consisting of pretrigger part length + preset posttrigger part length.
Fig. 3.32 : PQ-General Oscillogram Record Triggering
Methods and Resulting Record Length
Fault
Course
Record
Courses
fault
cluster
single fault
T1
T2
T1
T1
T2
T1
permanent
fault
T2
T1
T2
T1
T2
single-shot
T2
multi-shot
T1
T2
T1
T2
T1
level
T1......pretrigger time
T2......posttrigger preset time
•
Multi-Shot Triggering
This method is similar to the previous one except that during ongoing posttrigger period,
eventual reactivation of trigger event is tested simultaneously and whenever detected, the
postrigger time countdown starts from a begin again and again. So if the postrigger time
reruns, the record is extended accordingly and will be completed only after no trigger event
reactivation for preset postrigger time occurs. The records can have different lengths: the
pretrigger part length is always the same, but the posttrigger part may vary.
•
Level Triggering
This method is similar to the previous one, but recording is initiated and then kept by absolute
value of the trigger event (not by its change from „0“ to „1“). Thus, if the trigger event gets
active (i.e. acquires value of "1") the recording starts and lasts for as long as the event keeps
active. After it enters passive state, the recording still continues for preset posttrigger time
and only then ends. As in the previous case, the record length is variable since real length of
posttrigger part depends on the trigger event activation duration .
The multi-shot triggering and the level triggering can be used, for example, when continuous recording
of power fault clusters in the network is required. If a record length in these cases exceeds allocated
memory capacity it is terminated prematurely.
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4. Computer Controlled Operation
Monitoring the currently measured values and the instrument setup can be done not only on the
instrument panel but also using a local or remote computer connected to the instrument via a
communication link. Such an operation is more comfortable, and it also allows you to use all the
options of the instrument, such as adjusting the inputs/outputs or setup and the monitoring of courses
recorded into the internal memory of the instrument, which it is not possible from the panel of the
instrument.
Following chapters describe instrument communication links from the hardware point of view and
embedded webserver only. The detailed description of ENVIS program can be found in the program
manual.
4.1 Communication Links
4.1.1 Local Communication Link
As standard, the instruments are equipped with a serial interface USB 2.0, on the front panel. Using
this interface, adjusting the parameters of the instrument and the transmission of data into a portable
computer can be accomplished.
Considering the fact that the instruments can be also equipped with a remote communication link, the
described communication link is called Local.
When data need to be transmitted via the local communication link, the operator must interconnect the
instrument with the PC using the appropriate communication cable ( type USB-A/mini, see optional
accessory list ). When connecting the instrument to the PC, the USB LED-diode of appropriate
connector indicates a successful fulfilment of the connection. When data are transferred through the
link the LED flashes.
4.1.2 Remote Communication Link
The instruments may be optionally equipped with a remote communication link for operation of the
instrument via a remote computer. Subsequently, this computer can execute a remote adjusting of the
instrument and transmission of current or recorded data.
The remote communication link is always galvanically separated from the internal circuits of the
instrument. The type of interface can be of various types ( RS-232, RS-485, Ethernet etc. ).
Appropriate connector is situated at the rear panel. It is supposed the cable for remote communication
link to be provided by customer.
One or more instruments can be connected to the remote PC via this link. Each instrument must have
an adjusted proper remote communication address and protocol. These specifications can be set
manually or by the computer via a local communication link in ENVIS program.
4.1.2.1 RS-232 Interface
Only one instrument can be connected to this interface. The communication cable length should not
exceed several tens of meters. Used signals : RxD , TxD , GND .
4.1.2.2 RS-485 Interface
Up to 32 instruments at a maximum distance of 1,200 metres can be connected to this interface. Used
signals : A , B , GND .
Each instrument must have a different communication address within the range of 1 to 253 preset
during the installation.
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SMV / SMP / SMVQ / SMPQ
A 232/485 or USB/485 level converter connected to a standard serial port must be installed on the
computer side. The converter must provide an automatic communication flow direction switching
function. For suitable converters see optional accessory list.
4.1.2.2.1 Communication Cable
For common applications (cable length up to 100 metres, communication rate up to 9,600 Bd) the
selection of the right cable is not crucial. It is practically possible to use any shielded cable with two
pairs of wires and to connect the shielding with the Protective Earth wire in a single point.
With cable lengths over 100 metres or with communication rates over 20 kilobits per second, it is
convenient to use a special shielded communication cable with twisted pairs and a defined wave
impedance (usually about 100 Ohm).Use one pair for the A and B signals and the second pair for the
GND signal.
4.1.2.2.2 Terminating Resistors
The RS-485 interface requires impedance termination of the final nodes by installation of terminating
resistors, especially at high communication rates and long distances. Terminating resistors are only
installed on the final points of the link (for example one on the PC and another on the remotest
instrument). They are connected between terminals A and B. Typical value of the terminating resistor
is 330 Ohm.
4.1.2.3 Ethernet (IEEE802.3) Interface
Using this interface the instruments can be connected directly to the local computer network (LAN).
Instruments with this interface are equipped with a corresponding connector RJ- 45 with eight signals
(in accordance with ISO 8877), a physical layer corresponds to 10/100 BASE- T.
Type and maximum length of the required cable must respond to IEEE 802.3. Each instrument must
have a different IP- address, preset during the installation.
4.1.2.4 Communication Protocols
4.1.2.4.1 KMB Communications Protocol
This manufacturer proprietary protocol is used for communication with the ENVIS-DAQ or the ENVISOnline program.
4.1.2.4.2 Modbus-RTU Communications Protocol
For the chance of easier integration of the instrument to the user's program, the instrument is also
equipped with the Modbus - RTU communications protocol. A detailed description of the
communications records can be found in an appropriate manual.
4.2 The ENVIS Program
The ENVIS set of programs is used to set up the instruments, downloading measured data (both
actual and recorded in instrument archives) and to data visualization and archiving on a supervising
PC. Detailed operation description can be found in manuals of the programs ( www.kmb.cz ).
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SMV / SMP / SMVQ / SMPQ
Fig. 4.2 : Measured Data Visualization Examples
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SMV / SMP / SMVQ / SMPQ
4.3 Embedded Webserver
All of instruments with Ethernet remote communication interface are equipped with an embedded
webserver, thus both all of main measured values and the instrument setting can be viewed with a
standard web browser. It requires to set properly the instrument remote communication parameters
and to connect it to the network. Then in the web browser enter appropriate IP-address of the
instrument and information from the instrument appears as shown on Fig. 4.1.
Fig. 4.1 : Webserver
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SMV / SMP / SMVQ / SMPQ
5. Examples of Connections
Star connection (3Y), voltage direct
connection, mains 3 x 230/400 V
Star connection (4Y), voltage direct
connection, mains 3 x 230/400 V
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SMV / SMP / SMVQ / SMPQ
Delta connection (3D), no neutral wire,
voltage direct connection, auxiliary DC
power supply
Delta connection (3D), voltage and
current connection on the HV side via
VT, CT
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SMV / SMP / SMVQ / SMPQ
SMP33, L-Option
Star connection (3Y),
direct low voltage auxiliary power
SMP44, F-Option
Star connection (4Y), B3000/1000 current
sensors
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SMV / SMP / SMVQ / SMPQ
SMP44, S-Option
Star connection (4Y), JC-line current
transformers
Connection of analog 20 m current
loop input
67
SMV / SMP / SMVQ / SMPQ
Connection of relay output, pulse output
and digital input
Connection of Pt100 temeperature
sensor
68
SMV / SMP / SMVQ / SMPQ
RS - 485 remote communication link
connection
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SMV / SMP / SMVQ / SMPQ
6. Technical Specifications
Measured Quantities - Voltage
Quantity
SMV / SMP / SMVQ / SMPQ
33 / 44 400
SMV / SMP / SMVQ / SMPQ
33 / 44 100
Frequency
fNOM – nominal frequency
measuring range
measurement uncertainty
50 / 60 Hz
42.5 ÷ 57.5 / 51 ÷ 69 Hz
± 10 mHz
Voltage
measuring range
( terminals U1, U2, U3 and N
towards PE, phase / line )
measurement uncertainty
(tA=23 ±2 ºC)
5÷500VAC meas. range :
full measuring range :
temperature drift
UNOM (Udin) - nominal voltage
( terminals U1, U2, U3 and N
towards PE, phase / line )
to fulfil class S of IEC 610004-30 ed. 2 for overvoltage
class III
peak overload
3÷800 VAC / 5÷1380 VAC
1÷200 VAC / 2÷346 VAC
± 0.1 % of rdg ± 0.1 V
± 0.1 % of rdg ± 0.5 V
± 0.1 % of rdg ± 0.1 V
±0.05 % of rdg ±0.1 V / 10 ºC
±0.05 % of rdg ±0.03 V / 10 ºC
200÷ 400 / 350 ÷ 693 VAC
57.7 ÷ 130 / 100 ÷ 225 VAC
1200VAC ( UL – PE ) / 1 minute
300VAC ( UL – PE ) / 1 minute
Flicker
measuring range
measurement uncertainty
0.4 ÷ 10
± 5 % of rdg ( according to IEC 61000–4-15 )
Voltage Dips / Swells
ΔU measurement uncertainty
± 0.5 % UNOM
Voltage Interruptions
interruption duration
measurement uncertainty
± 1 cycle
Voltage Unbalance
measuring range
measurement uncertainty
0÷5%
± 0.15 % of rdg or ± 0.15
Voltage Harmonics, Interharmonics
reference conditions
measuring range
measurement uncertainty
other harmonics up to 200 % of class 3 of IEC 61000–2-4 ed.2
10 ÷ 100 % of class 3 of IEC 61000–2-4 ed.2
twice the levels of class II acc. to IEC 61000–4-7 ed.2
THDU
measuring range
measurement uncertainty
0 ÷ 20 %
± 0.3
Power Quality (SMPQ instruments only)
evaluation method
weekly, according EN 50160
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SMV / SMP / SMVQ / SMPQ
Measured Quantities – Current, Power, Power Factor, cos φ
Standard “X/5A”- and “P”- Option Instruments
Quantity
SMV, SMP instruments
SMVQ, SMPQ instruments
Current
INOM - nominal current
“X/5A”-optrin
“Pxxx”-option
measuring range
measurement uncertainty
(tA=23 ±2 ºC)
temperature drift
peak overload
5 AAC
xxx AAC
0.001 ÷ 1.2 INOM
I <= 0.5 % of INOM :
± 0.3% of rdg ± 0.06 % INOM
± 0.3 % of rdg ± 0.06 % INOM
I > 0.5 % of INOM :
± 0.1 % of rdg ± 0.02 % INOM
± 0.05 % of rdg ± 0.02 % INOM / 10 ºC
14 x INOM / 1 second
Current Unbalance
measuring range
measurement uncertainty
0÷5%
± 0.15 % of rdg or ± 0.15
Current Harmonics, Interharmonics
measuring range
measurement uncertainty
Ih <= 10 % of INOM
Ih > 10 % of INOM
0 ÷ 100 % of INOM
± 0.5 % of INOM
± 5 % of rdg
THDI
measuring range
measurement uncertainty
0 ÷ 200 %
± 0.3 % of rdg ± 0.3
Active / Reactive Power, Power Factor, cos φ (PREF = 230 x INOM )
reference conditions “A” :
U & I reference conditions
U >= 0.05 UNOM, I >= 0.05 INOM
active p.,PF,cos φ ref.cond.
PF = 1.00
reactive power ref. condition
PF = 0.00
active / reactive power
± 1.0 % of rdg ± 0.01 % PREF
± 0.5 % of rdg ± 0.005 % PREF
measurement uncertainty
power factor, cos φ
± 0.01
± 0.005
measurement uncertainty
reference conditions “B” :
U & I reference conditions
U >= 0.05 UNOM, I >= 0.1 INOM
U >= 0.05 UNOM, I >= 0.01 INOM
active p.,PF,cos φ ref.cond.
PF >= 0.5
reactive power ref. condition
PF <= 0.87
active / reactive power
± 2.0 % of rdg ± 0.02 % PREF
± 1.0 % of rdg ± 0.01 % PREF
measurement uncertainty
power factor, cos φ
± 0.01
± 0.005
measurement uncertainty
reference conditions “C” :
U & I reference conditions
U >= 0.05 UNOM, I >= 0.01 INOM
active p.,PF,cos φ ref.cond.
PF >= 0.25
PF <= 0.97
reactive power ref. condition
active / reactive power
± 1.5 % of rdg ± 0.02 % PREF
measurement uncertainty
power factor, cos φ meas unc.
± 0.01
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SMV / SMP / SMVQ / SMPQ
Measured Quantities – Energy
Standard “X/5A”- and “P”- Option Instruments
Quantity
SMV, SMP instruments
SMVQ, SMPQ instruments
Energy
measuring range
4 quadrants, matching the U, I measuring range
± 2.0 % of rdg at ref. conditions :
active energy measurement
U >= 0.05 UNOM,
class 0.5S acc. to EN 62053 – 21
uncertainty
I >= 0.1 INOM
PF >= 0.5
± 2.0 % of rdg at ref. conditions :
reactive energy measurement U >= 0.05 UNOM,
class 2 acc. to EN 62053 – 23
uncertainty
I >= 0.1 INOM
PF <= 0.87
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SMV / SMP / SMVQ / SMPQ
Measured Quantities – Current, Power, Power Factor, cos φ
F-Option Instruments ( with B3000 / B1000 / B300 Flexible Current Sensors )
Quantity
Current
measurement method
continuous (gapless)
measuring range
1. range “3000” : 0 ÷ 3150 AAC
- sensors B3000-xxx
2. range “1000” : 0 ÷ 1050 AAC
3. range “300” : 0 ÷ 315 AAC
4. range “100” : 0 ÷ 105 AAC
- sensors B1000-xxx
1. range “1000” : 0 ÷ 1050 AAC
2. range “300” : 0 ÷ 315 AAC
3. range “100” : 0 ÷ 105 AAC
4. range “30” : 0 ÷ 31.5 AAC
- sensors B300-xxx
1. range “300” : 0 ÷ 315 AAC
2. range “100” : 0 ÷ 105 AAC
3. range “30” : 0 ÷ 31.5 AAC
4. range “10” : 0 ÷ 10.5 AAC
measurement uncertainty ( tA =
22 ±1 ºC, conductor at the
± 1 % of rdg ± 0.1 % of rng
centre of flexible loop )
temperature drift
± 0.1 % of rdg ± 0.02 of rng / 10 ºC
loop position influence
max. 2 % of rdg
external field influence
- Bxxx - JRF line ( std. )
max. 2 % of rng
- Bxxx - JRFS line (shielded)
max. 1.5 % of rng
phase angle uncertainty
5 ÷ 100 % of meas. range
± 0.5 °
1 ÷ 5 % of meas. range
±1°
Current Unbalance
measuring range
0÷5%
measurement uncertainty
± 0.3 % of rdg or ± 0.3 *)
Current Harmonics, Interharmonics
measuring range
0 ÷ 100 % of rng
measurement uncertainty
± 1 % of rng *)
THDI
measuring range
0 ÷ 200 %
measurement uncertainty
± 2 % of rdg ± 2.0 % *)
*) ...tA = 22 ±1 ºC, conductor at the centre of flexible loop, no electromagnetic field
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SMV / SMP / SMVQ / SMPQ
Measured Quantities – Current, Power, Power Factor, cos φ
F-Option Instruments ( with B3000 / B1000 / B300 Flexible Current Sensors )
Active / Reactive Power, Power Factor, cos φ ( B3000 or B1000 Current Sensors )
reference conditions “A” :
U & I reference conditions
U >= 5% of meas. range, I >= 5% of meas. range
active p.,PF,cos φ ref.cond.
PF = 1.00
reactive power ref. condition
PF = 0.00
active / reactive power
± 1.0 % of rdg ± 0.5 % of rng *)
measurement uncertainty
power factor, cos φ
± 0.01 *)
measurement uncertainty
reference conditions “B” :
U & I reference conditions
U >= 5% of meas. range, I >= 5% of meas. range
active p.,PF,cos φ ref.cond.
PF >= 0.5
reactive power ref. condition
PF <= 0.87
active / reactive power
± 2.0 % of rdg ± 1 % of rng *)
measurement uncertainty
power factor, cos φ
± 0.02 *)
measurement uncertainty
*) ...tA = 22 ±1 ºC, conductor at the centre of flexible loop, no electromagnetic field
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SMV / SMP / SMVQ / SMPQ
Measured Quantities – Current, Power, Power Factor, cos φ
S-Option Instruments ( with JC-Line Current Transformers )
Quantity
Current
measurement method
continuous (gapless)
nominal current INOM
xxx AAC
“Sxxx”- option
0
÷
110 % INOM
measuring range
measurement uncertainty
± 1 % of rng
phase angle uncertainty
± 1 ° for I >= 5 % of rng
Current Unbalance
measuring range
0÷5%
measurement uncertainty
± 0.5
Current Harmonics, Interharmonics
measuring range
0 ÷ 100 % of rng
measurement uncertainty
± 5 % of rng
THDI
measuring range
0 ÷ 200 %
measurement uncertainty
± 5.0
Active / Reactive Power, Power Factor, cos φ ( PREF = 230 x INOM )
reference conditions “A” :
U & I reference conditions
U >= 5% of meas. range, I >= 5% of meas. range
active p.,PF,cos φ ref.cond.
PF = 1.00
reactive power ref. condition
PF = 0.00
active / reactive power
± 2 % of PREF
measurement uncertainty
power factor, cos φ
± 0.02
measurement uncertainty
reference conditions “B” :
U & I reference conditions
U >= 5% of meas. range, I >= 5% of meas. range
active p.,PF,cos φ ref.cond.
PF >= 0.5
reactive power ref. condition
PF <= 0.87
active / reactive power
± 4 % of PREF
measurement uncertainty
power factor, cos φ
± 0.04
measurement uncertainty
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SMV / SMP / SMVQ / SMPQ
Other Specifications
Quantity
instrument classification
voltage inputs power ( impedance)
current inputs power ( impedance)
(“X/5A”- option models only)
aux. power supply voltage ( power )
“U“ -instruments (standard)
“L”-option instruments
relay outputs
impulse outputs
digital (synchronizing) input
20 mA current loop analog input :
measuring range
measurement uncertainty
impedance
Pt100 temperature sensor analog
input :
measuring range
measurement uncertainty
overvoltage class / pollution degree
operational temperature :
SMV, SMVQ instruments
SMP, SMPQ instruments
storage temperature
operational and storage humidity
EMC – immunity
EMC – emissions
RTC : accuracy
backup battery capacity
local communication port
remote communication port
class S in compliance with IEC 61000-4-30 ed. 2
< 0.7 VA ( RL – PE = 880 kΩ )
< 0.5 VA ( Ri < 10 mΩ)
85 ÷ 275 VAC / 45 ÷ 450 Hz, 80 ÷ 350 VDC ( 5 VA / 4 W )
20 ÷ 50 VAC / 45 ÷ 450 Hz, 20 ÷ 75 VDC ( 5 VA / 4 W )
switch contact, 230 VAC or 30 VDC / 3 A
semiconductor, optically isolated (and mutually),
max. 100 VDC / 300 mA
in compliance with EN 62053-31 ( SO-output, pulse length 80
ms, max. 6.25 Hz )
5V DC / 1 mA , minimum pulse length 100 ms, minute or
quarter-hour signal, ( - ) pole linked internally with PE terminal
2 ÷ 22 mA
± 0.5 % of range
75 Ω
- 50 ÷ 150 ºC
± 1 ºC ( two-wire connection, loop impedance noncompensated )
III / 2 - according to EN 61010 - 1
- 40 to 60°C
- 25 to 60°C
- 40 to 85°C
< 95 % - non-condensable environment
EN 61000 – 4 - 2 ( 4kV / 8kV )
EN 61000 – 4 - 3 ( 10 V/m up to 1 GHz )
EN 61000 – 4 - 4 ( 2 kV )
EN 61000 – 4 - 5 ( 2 kV )
EN 61000 – 4 - 6 ( 3 V )
EN 61000 – 4 - 11 ( 5 periods )
EN 55011, class A
EN 55022, class A (not for home use )
+/- 2 seconds per day
> 5 years ( without supply voltage applied )
standard USB 2.0
optional RS-485 / RS-232 / Ethernet 10/100 Base-T
76
SMV / SMP / SMVQ / SMPQ
Design
Quantity
SMV, SMVQ instruments
SMP, SMPQ instruments
display
LED, numeric,
4 lines x 4 digits
backlit LCD, graphic,
240 x 160 pixels
protection class
dimensions
panel cutout
weight
IP 40 ( IP 54 with cover sheeting ), rear panel IP 20
panel - 96x96 mm, built-in depth 80 mm
92+1 x 92+1 mm
0.3 kg
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SMV / SMP / SMVQ / SMPQ
7. Maintenance, Service
The instruments do not require any maintenance in their operation. For reliable operation it is only
necessary to meet the operating conditions specified and not expose the instrument to violent
handling and contact with water or chemicals which could cause mechanical damage.
The built–in CR2450 lithium cell can backup the memory and real time circuit for more than 5 years
without power supply, at average temperature 20°C and load current in the instrument less than 10
μA. If the cell is empty, it is necessary to ship the instrument to the manufacturer for battery
replacement.
In the case of failure or a breakdown of the product, you should contact the supplier at their address:
Supplier :
Manufacturer :
KMB systems, s.r.o.
Dr. M. Horákové 559
460 06 LIBEREC 7
Czech Republic
Phone+420 485 130 314
Fax +420 482 736 896
E-mail: [email protected]
Website: www.kmbsystems.eu
The product must be in proper packaging to prevent damage during transit. A description of the
problem or its symptoms must be delivered together with the product.
If a warranty repair is claimed, the warranty certificate must be sent in. In case of an out-of-warranty
repair you have to enclose an order for the repair.
Warranty Certificate
Warranty period of 24 months from the date of purchase is provided for the instrument, however, no
longer than 30 months from the day of dispatch from the manufacturer. Problems in the warranty
period, provably because of faulty workmanship, design or inconvenient material, will be repaired free
of charge by the manufacturer or an authorized servicing organization.
The warranty ceases even within the warranty period if the user makes unauthorized modifications or
changes to the instrument, connects it to out-of-range quantities, if the instrument is damaged due to
ineligible or improper handling by the user, or when it is operated in contradiction with the technical
specifications presented.
Type of product: SM.....................................
Serial number...............................................
Date of dispatch: ...........................................
Final quality inspection: ................................
Manufacturer’s seal:
Date of purchase: ...............................................
Supplier’s seal:
78