Download 08 SFT2841 connected..

SFT 2841 IN CONNECTED MODE
 Prepare setting files
C
B
?
A
Situate SFT 2841
connected
Main points to remember
Parameter setting
Overview of the software
Starting the application
 Click on the icon
Same access for SFT
disconnected
 Select the working language
 Choose the operating mode:
– connected
– point to point via the front panel
– via the network
SFT2841 connected EN 2007_01.ppt
2
Connection via the network
 Choice of the network
 If required: creation
or modification of
the network
 Connection to
Sepam units via the
network
 Starting of SFT 2841
software on the chosen
station
SFT2841 connected EN 2007_01.ppt
3
SFT 2841 expert UMI
 The protection and parameter setting data
may be saved.
 Reports may be edited.
SFT2841 connected EN 2007_01.ppt
4
PARAMETER SETTING
C
B
?
A
Situate SFT 2841
connected
Main points to remember
Parameter setting
Overview of the software
Current operation
 Metering and operating
data
–
–
–
–
alarm messages
tripping current
number of operations
logic status of inputs,
outputs and LEDs
 Parameter setting
– of each protection
function
– of control logic
– of general installation
and Sepam data
SFT2841 connected EN 2007_01.ppt
6
Logipam
–
–
–
–
Selection
Choice in the list
Apply
Activate
– Delete
– Download onto the PC
– Automatic updating
SFT2841 connected EN 2007_01.ppt
7
Logipam internal resources
 LOGIPAM:
–
–
–
–
internal bits
counters
clocks
delays
SFT2841 connected EN 2007_01.ppt
8
General information on connected mode
–
–
–
–
–
–
Connection
Sepam type
Sepam name
Code operating mode
Remote control
Internal clock
SFT2841 connected EN 2007_01.ppt
9
General diagnosis
Series 20
– General characteristics
– Software versions
– Sepam status
– Clock with time-setting
– Presence of modules
– Monitoring of
communication exchanges
SFT2841 connected EN 2007_01.ppt
10
General diagnosis
Series 40
– General characteristics
– Software versions
– Sepam status
– Clock with time-setting
– Presence of modules
– Monitoring of
communication exchanges
SFT2841 connected EN 2007_01.ppt
11
General diagnosis
Series 80
– General characteristics
– Software versions
– Sepam status
– Clock with time-setting
– Presence of modules
– Monitoring of
communication exchanges
SFT2841 connected EN 2007_01.ppt
12
Diagnosis: LED, input and output status
Series 40 & 80
– Display of LEDs
– Display of validated inputs
– Display of outputs
– Testing of 3s pulse outputs
SFT2841 connected EN 2007_01.ppt
13
Diagnosis: remote indication (TS) status
Series 40 & 80
– Status transmitted via the
communication link
SFT2841 connected EN 2007_01.ppt
14
Measurements
Series 80
Network measurements:
 Current measurements
– rms
– demand
– maximum
– residual
– additional
 Voltage measurements
– phase-to-neutral
– phase-to-phase
– positive-sequence
– negative-sequence
 Frequency measurement
SFT2841 connected EN 2007_01.ppt
15
Measurements: vector diagram
Series 80
 Display
– voltage
– current
 Select
– scale
– référence
SFT2841 connected EN 2007_01.ppt
16
Power and energy measurements
Series 80
 Power measurements
– active
– reactive
– apparent
– power factor
 Energy measurements
– active
– reactive
SFT2841 connected EN 2007_01.ppt
17
Temperature measurements
Series 80
 MET 148 modules
SFT2841 connected EN 2007_01.ppt
18
Network diagnosis
Series 80
– Unbalance ratio
– Phase displacement
– Number of trips
– Phase
– Earth
– Total Harmonic Distortion
SFT2841 connected EN 2007_01.ppt
19
Network diagnosis
Series 80
 Machine diagnosis
– Differential measurements
– Phase angles
– Impedance measurements
– Thermal overload
– Running hours counter
SFT2841 connected EN 2007_01.ppt
20
Network diagnosis
Series 80
 Tripping contexts
– Selection by date
SFT2841 connected EN 2007_01.ppt
21
Switchgear diagnosis
Series 80
– Cumulative breaking
current
– …
SFT2841 connected EN 2007_01.ppt
22
Alarm management
Series 80
 Current alarms
– Not acknowledged
– Clear
– Reset
 Alarm history
– 200 alarms
SFT2841 connected EN 2007_01.ppt
23
Disturbance recording
Series 80
– Selection by date
–
Recovery of recording
– Voluntary trigger
SFT2841 connected EN 2007_01.ppt
24
On-line help
Series 80
 On-line help
SFT2841 connected EN 2007_01.ppt
25
MAIN POINTS TO REMEMBER
C
B
?
A
Situate SFT 2841
connected
Main points to remember
Parameter setting
Overview of the software
Network diagnosis functions
Tripping current
 This function gives the RMS values of the phase currents and
residual currents at time of the last trip.
 The measurement is defined as the maximum RMS value
measured during a 30 ms interval after the activation of the O1
output.
Acquisition of tripping current TRIPI1.
RETURN
SFT2841 connected EN 2007_01.ppt
27
Machine operating assistance functions
Current phase displacement
 Current phase displacement between the main phase currents (I)
and additional phase currents (I') (1, 2, 3) is calculated for each
phase.
 The angle is measured in the clockwise direction.
 The information is used to check Sepam wiring when 87T protection
functions are implemented.
I

I’1
RETURN
SFT2841 connected EN 2007_01.ppt
28
Metering functions
Power factor (Cos)
 This function gives the phase displacement between the phase
currents and the phase-to-neutral voltages.
 The + and - signs and the IND (inductive) and CAP (capacitive)
indications give the direction of power flow and the type of load.
Q
V

-CAP
+IND
I
P
-IND
+CAP
RETURN
SFT2841 connected EN 2007_01.ppt
29
Network diagnosis functions
Phase displacement
 This function gives:
Io
0
Vo
– phase displacement measured between the residual voltage and residual
current in the trigonometric direction
– phase displacement between the V1, V2, V3 voltages and I1, I2, I3
currents respectively, in the trigonometric direction
I

V
 The measurements are used during Sepam commissioning to check
that the voltage and current inputs are wired correctly.
 The angle is positive when the current is leading compared to the
voltage (trigonometric direction).
 the angle is modified by 180° by the setting incomer / feeder.
RETURN
SFT2841 connected EN 2007_01.ppt
30
Machine operating assistance
Differential / through current
 Differential / through current is calculated for the implementation
of the differential protection functions 87T and 87M.
 It is calculated for each phase by:

 
I diff  I  I 
 

I  I
It 
2
 When a transformer is used (87T), the Idiff / It calculation takes
into account the vector shift and transformation ratio..
 The Idiff / It value is expressed with respect to In, the rated
current of the main channels.
Idiff = Iadjusted + I’adjusted
It = max ( Iadjusted , I’adjusted )
RETURN
SFT2841 connected EN 2007_01.ppt
31
Metering functions
Physical values measured
 Sepam measures the following physical values:
–
–
–
–
phase current (3I)
residual current (Io)
phase voltage (3V)
residual voltage (Vo)
 Each measured signal is processed by Sepam to produce all
the values necessary for the metering, diagnosis and
protection functions.
RETURN
SFT2841 connected EN 2007_01.ppt
32
Metering functions
RMS measurement
 RMS measurement is only used by the phase current metering
function and for the thermal overload protection function (49). The
RMS values take into account harmonics up the the 13th.
 For all other metering and diagnosis functions, the H1 fundamental
50 Hz or 60 Hz component is used.
RETURN
SFT2841 connected EN 2007_01.ppt
33
Metering functions
Residual current
 This function gives the RMS value of the residual current obtained
by:
– measurement: Io
– calculation of the sum of the phase currents: Io
 Accuracy at Ino: ±1%.
 Accuracy ± 2% from 0.3 to 1.5 Ino
 Accuracy ± 3% from 0.1 to 0.3 Ino
 The measurement range extends to 40 Ino when Io measurement
is used. In the other cases, the range extends to 20 Ino.
RETURN
SFT2841 connected EN 2007_01.ppt
34
Metering functions
Demand phase current
A
Demand current
5mn 5mn 5mn 5mn 5mn
100A
55A 63A 89A 78A 59A t
 Resetting to zero:
– by the clear key on the display unit if one of the two screens is
displayed,
– by the clear command in the SFT2841 software,
– via the communication link (remote control order TC4).
RETURN
SFT2841 connected EN 2007_01.ppt
35
Metering functions
Peak demand current
 At the end of each integration period, i.e. once the new demand
current values are available, the function determines the greatest
demand current value obtained since the last reset.
A
Peak demand current
5mn 5mn 5mn 5mn 5mn
100A
55A 63A 89A 89A 89A t
RETURN
SFT2841 connected EN 2007_01.ppt
36
Metering functions
Phase-to-phase voltage
 This function gives the RMS value of the 50 or 60 Hz
component of the phase-to-phase voltages.
 U21 voltage between phases 2 and 1 (U21=V1-V2)
 U32 voltage between phases 3 and 2 (U32=V2-V3)
 U13 voltage between phases 1 and 3 (U13=V3-V1)
– by calculation when 3 phase-to-earth VTs are connected,
– by measurement (U21 and U32) and by calculation (U13) when 2
phase-to-phase VTs are connected,
– by measurement (U21) when only one phase-to-phase VT is
connected, in which case the U32 and U13 voltages are not
available.
RETURN
SFT2841 connected EN 2007_01.ppt
37
Metering functions
Frequency
 This measurement is based on:
– U21 if only one phase-to-phase voltage is available,
– positive sequence voltage if the U21 and U32 measurements are
available.
 The frequency is not displayed (replaced by ****) if:
– U21 or Vd is less than 40% of Un.
– frequency is out of range.




Accuracy at Unp: ±0.01Hz
25 to 65 Hz range Sepam series40 and 80
45 to 55 Hz if 50Hz Sepam series 20
55 to 65 Hz if 60Hz Sepam series 20
RETURN
SFT2841 connected EN 2007_01.ppt
38
Metering functions
Power factor (Cos)
 Capacitive/inductive circuit:
 If V is leading compared to I, in the trigonometric (counter-clockwise)
direction, then  is positive.
 A capacitive (CAP) circuit is one in which the current is leading
compared to the voltage ( <0).
 An inductive (IND) circuit is one in which the current is lagging
compared to the voltage ( >0).
V

I

I
V
RETURN
SFT2841 connected EN 2007_01.ppt
39
Metering functions
Active, reactive and apparent power
 For an incoming circuit:
– Power supplied to the busbars
is positive.
– Power supplied by the busbars
is negative.
Direction of
power flow
 For an outgoing circuit:
– Power supplied to the busbars
is negative.
– Power supplied by the
busbars is positive.
Direction of
power flow
RETURN
SFT2841 connected EN 2007_01.ppt
40