Download Instruction Manual

MPR 2000 (5 Thermal Sensors)
Motor Protection Relay
(Includes Version D)
Instruction Manual
Ver. 1.0 / 2001
Table of Contents
Page
3
4
5
6- 7
8
9
10-11
12-13
14
15-16
16
17-18
19
20-28
29
30
31
32
33
34
35
36-38
38
Subject
Introduction to MPR
Wiring Diagram
Rear Panel Layout
Control Terminals, DIP Switch Selection and Location
Front Panel
- Layout
- Settings
LCD Displays
Menu Configuration
Parameter Settings
- Communication Settings
- System Parameter Settings
- Voltage Settings
- Current Settings
- Temperature Settings
Tripping/Alarm Options
Trip and Alarm Default Setting & Activity Table, ANSI Codes
Actual Data
- Measured and Calculated Data
- Logical Inputs, Statistical Data and Fault Data
- Statistical and Fault Data
Messages
-Test Messages
- Flash Messages, Constant Messages
Communication
Technical Specification
Case and Cutout Details
Note
Installation, operation and maintenance should be in strict accordance with the instructions in this manual,
national codes, and good practice. Installation or operation not performed in strict accordance with these
instructions shall void the manufacturers warranty.
Warning
Unit must be grounded prior to connection of any power.
Disconnect all power inputs before wiring or servicing the equipment.
Warranty
SOLCON warrants the Product to be free from defects in workmanship and material. Product which prove
defective within one year of operation, but no later than 18 months from date of shipment, shall be repaired
or replaced free of charge, FOB factory. This is providing the customer promptly sends to Solcon a notice
of defect and satisfactory proof thereof; establishing that the product had been correctly applied, installed,
maintained and operated in accordance with Solcon's written instructions, appropriate codes, regulations
and good practice, within the limits of rated capacity and normal usage; and assumes the obligation of all
expenses of returning the defective product to the factory.
The company reserves the right to make any improvements or modifications to its products without prior
notice.
1
Introduction
a.
b.
The MPR 2000 Motor Protection Relay is a new
generation of microprocessor based relay designed to
operate with 3 phase induction motors.
True RMS voltages and currents are measured at a
sampling rate of 0.5 msec. This enables the MPR to be
used with variable speed drives and soft starters.
The MPR incorporates two main functions.
Motor protection.
Supervision and communication.
Unique Tripping / Alarm options, make it possible to
designate any fault as an Alarm, Trip, both or none.
This unique facility also enables controlled fault Reset
possibilities. Authorized key enlarges the reset
possibilities.
A unique "Time To Trip" algorithm enables the
operator or host computer to take corrective actions
before tripping.
Optically isolated logic input is used as Authorized
Key input and as input control through RS485 serial
link.
The MPR incorporates four output relays. Two relays
are used for E/F and O/L (dedicated). Two additional
relays can be designated as Trip or Alarm.
Protection
AC motors are very rugged and reliable when
operating within their limits. However, they are usually
designed to operate close to their rated limits with
minimal margins for operating under abnormal
conditions.
A comprehensive protection device is required to
accurately create a Thermal Modelling for the motor to
run safely up to its limits.
This relay protects the motor from abnormal conditions
in the power supply, motor and cabling faults as well
as operator malfunctions.
The MPR monitors three phase voltages, three phase +
earth fault currents and temperature inputs from 5
sensors. All are combined to provide the most
comprehensive protection package.
The MPR can interpret as many as 31 different trips /
alarms.
Undervoltage,
Voltage
based
protection
Overvoltage*, Phase loss, Phase sequence.
Current based protection - Too many starts, Maximum
start time, Under current *, Load increase, Low-set
overcurrent (Stall / Locked protection) , High set
overcurrent (Short circuit), Thermal Overload*,
Unbalanced current *, Earth fault current*.
Voltage/Current based protection - Under power.
Temperature based - Temperature protection for 5
sensors*.
General based protection - Serial port failure.
* 2 levels - for Alarm and Trip.
Protection levels and time delay settings are
individually configured through a key pad on the front
panel or through the communication port.
Supervision and Communication
A Liquid Crystal Display (LCD), together with a
Keypad and LEDs enables user friendly interface,
accurate digital parameters setting, actual parameters
reading, and detailed trip and alarm messages display.
Unauthorized setting changes can easily be prevented
by the correct use of the Authorized key input
terminals.
Measured data - Phase and line voltages, Phase
currents, Earth fault current, Power, Power factor and
RTD/Thermistor channel resistance/°C.
Calculated data - Motor load in % of FLC, Thermal
Capacity, Time to trip, Time to start, Unbalanced
current.
Logic input status - Individual status of Authorized key
contact.
Statistical data - Motor running hours, Total number of
starts, Total number of trips, Last start period, last start
peak current.
Fault data - Last Trip, Last Alarm, Phase currents,
Earth fault current, Phase voltages, all at time of trip.
RS485 serial link (with MODBUS communication
protocol), operating at baud rate of 1200 to 9600
bits/sec enables monitoring of setpoints and actual
parameters. Modifications of the setpoint parameters
through the serial link makes it easy to modify
setpoints in place of the factory default parameters.
RS485 enables 32 MPR units to be connected on the
same link to the host computer. When a need for more
than 32 units arises, using HMI & Data highway
equipment, a n unlimited number of MPR units can be
connected to the host computer.
2
Wiring Diagram
3
Rear Panel Layout
4
Control Terminals
Auxiliary Power Supply
Earth Fault Current
Currents measured through a differential C/T with a
secondary of 5 A or 1 A.
All phases ..1 A, 5 A, Common ................. 46, 47, 48
Note: It is recommended to use differential C/T. If a
differential C/T is not available, Earth Fault can be
measured using C/T Wiring Diagrams on Page 7.
AC power supply :
115 / 230 VAC, 50/60 Hz (switchable).
Phase ........................................................................ 29
Neutral ................................................................... 30
Ground ................................................................... 28
DC Power Supply (optional):
19-60 or 85-300 VDC.
DC(+) ...................................................................... 29
DC (-) ...................................................................... 30
Ground..................................................................... 28
Thermal Sensors
The MPR can accept inputs from :
* Up to 5 RTDs (PT100)
* Up to 3 Thermistors + 2 RTDs (PT100)
Resistances
(To configure the MPR see "DIP Switch Location" on
page 7 )
* RTD 100 -240
* Thermistor 0.1K -30K
RTD or Thermistor selection is done by removing rear
panel to set Dip Switches SW1.1 - SW1.8 on analog
PCB. Set all 8 ON for Thermistors and OFF for RTDs.
LCD display in °C for RTD use only. Selected by
removing rear panel to set dip switch on CPU PCB,
SW1.3 = ON
RTDs three wire measurement system is used to
compensate for cable resistance. See temperature table
on page 25 (max. allowed cable resistance is 25 ).
Analog Inputs
The MPR can measure : three voltages, four currents
and three thermistors or up to five RTDs. True RMS
measurement is both for voltages and currents.
Frequency should be in the range of 45-66Hz. All
current and voltage inputs incorporate internal isolating
transformers.
Line Voltages
Direct connection of line to line voltages up to 690
VAC. For higher voltages, up to 25 KV, use P/Ts.
Phase L1 .................................................................. 33
Phase L2 ................................................................. 34
Phase L3 .................................................................. 35
Neutral (When used)............................................... 36
For single phase voltage measurement, connect phase
to 33, 34 & 35 and Neutral to 36.
Temperature sensors are connected as follows:
Five RTDs:
RTD 1 .......................................................... 17, 18, 19
RTD 2 .......................................................... 21, 22, 23
RTD 3 .......................................................... 25, 26, 27
RTD 4 .......................................................... 51, 52, 53
RTD 5 .......................................................... 55, 56, 57
Notes:
1. Line voltages must be connected for frequency
sensing. When system voltage measurement is
not available and AC power supply is used,
connect auxiliary power supply, 29 to phase
(33, 34, 35) and 30 to neutral input (36).
2. Power and Power factor can be calculated only
if three voltage inputs and three current inputs
are applied to the MPR in the correct sequence,
eg : V1 to 33 with I1 to 37/38 or V2 to 34 with
I2 to 40/41 etc
3. In V connection (medium and high voltage)
networks, connect the two phase output to 33
and 34, where the center of the V output will
be connected to terminal 35 (see page 16 for
calculation of voltage and P/T values).
Three Thermistors and Two RTDs:
Thermistor 1 ..................................................... 18, 19
Thermistor 2 ..................................................... 22, 23
Thermistor 3 .................................................... 26, 27
RTD 4 .......................................................... 51, 52, 53
RTD 5 .......................................................... 55, 56, 57
Note: If Thermistors/RTDs are not used, leave
terminals open, and disable all relevant Trip and
Alarms.
Shielded cables must be used, connect shield to
External ground terminal ..................................... 28
Line Currents
Currents measured through C/T secondary of 1 or 5 A.
Phase L1 ... 1 A, 5 A, Common ............... 37, 38, 39
Phase L2 ... 1 A, 5 A, Common ................ 40, 41, 42
Phase L3 ... 1 A, 5 A, Common ................ 43, 44, 45
Note: Power and Power factor can be calculated only if
three voltage inputs and three current inputs are applied
to the MPR in the correct sequence (see note 2 above).
5
Control Terminals
Dip Switch Location
Remove Rear Panel. P.C.B's are located as follows:
Authorized Key ............................................... 60&61
Open -Disabled
Closed -To enable the following:
* Change of parameters (through keyboard).
* Reset of any alarm/trip, regardless setting.
* Reset of the thermal capacity.
* Run self test.
* Store default settings.
* Reset and store of statistical data.
Auxiliary-2 Relay (Trip)
Must be designated (by parameter setting) as one of:
* Trip relay.
* Trip relay with Fail-Safe logic.
N.C. ...................................................................13&14
N.O. ..................................................................13&15
Serial Link
Standard RS485 Half Duplex, with MODBUS
protocol.
Twisted shielded pair should be used for wiring.
Acceptable baud rates: 1200, 2400, 4800 and 9600
BPS.
Serial Port (+) ............................................................ 3
Serial Port (-)............................................................. 2
Serial Port (shield) ................................................. 28
Output Relays
The MPR incorporates four output relays. Each has a
C/O contact, rated 8A/250VAC, 2000VA.
O/L Relay. Operates unconditional when O/L is
detected
N.C. ...................................................................... 4&5
N.O. ...................................................................... 4&6
Note: In MPR 2000/5-D O/L relay is slave relay to
Alarm relay.
1.
2.
E/F Relay. Operates unconditional when E/F is
detected
N.C. ...................................................................... 7&8
N.O. ...................................................................... 7&9
Note: In MPR 2000/5-D E/F relay is slave relay to Trip
relay.
Notes:
Auxiliary Power Supply must be turned Off
after changing baud rate value.
To match the line, connect 120 resistors
between (+) and (-) at the end and beginning of
the line.
C/T Wiring Diagrams
Three C/Ts + One
differential.
(Recommended
wiring).
Auxiliary-1 Relay (Alarm)
Must be designated (by parameter setting) as Alarm
relay with Fail-Safe logic.
N.C. .................................................................. 10&11
N.O. .................................................................. 10&12
Three C/Ts in a
residual
Earth
Fault Connection
Note: When set as Alarm, relay is energized when
MPR is powered (closing 10-12 N.O contact)
and de-energized upon alarm (closing 10-11
N.C contacts).
Note: When using this wiring diagram it is
recommended to increase the offset levels of
Alarm and Trip to avoid nuisance tripping.
6
Front Panel Layout
LEDs and Display Overview
Keys Overview
On
Illuminates when auxiliary power supply voltage is
connected.
Stopped
Illuminates in stop position. Indicates that both
contactors A and B are open.
Starting
Illuminates as a response to start command. Indicates
that command is still "ON" and motor's average current
is above 115% of rated current.
SET
PAGE
Press to change setpoint pages in
positive cyclical order.
DATA
PAGE
Press to change the data page in
positive cyclic order.
Press to forward parameters within
SELECT page. If key is pressed for more than
FWD. 0.5 sec, parameters will be displayed at
a fast rate.
Running
Illuminates after completion of starting process.
Indicates that motor's average current decreased below
115% of rated current.
Press to reverse parameters within
SELECT page. If key is pressed for more than
REV. 0.5 sec, previous parameters will be
displayed at a fast rate.
O/L Trip
Illuminates when O/L is detected (O/L relay is closed).
Press once to increase parameter value.
Press and hold to increase parameter
value at a fast rate (*).
E/F Trip
Illuminates when E/F is detected (E/F relay is closed).
Press once to decrease parameter value.
Press and hold to decrease parameter
value at a fast rate (*).
Alarm
Illuminates in Alarm condition. Stays lit even if alarm
condition disappears, turns off after resetting.
Trip
Illuminates in Trip condition. Stays lit even if trip
condition disappears, turns off after resetting.
RESET
Internal Failure
Illuminates upon internal fault detection. Stays lit even
if internal fault disappears turns off after resetting.
TEST
LCD Display
Two lines of 16 characters each,
presenting all data and messages.
STORE
Press to cancel displayed Alarm or Trip
(*).
Enables MPR self test and storing
default parameters (*).
Press to store displayed parameter
value in the non-volatile memory (*).
(*) Note: If Authorized Key is locked out (open), only
viewing is possible. When the Key is closed,
it is possible to view, change and store any
set parameter.
7
Front Panel Settings
Upon initiation of the MPR, the following occurs:
Returning to Factory Default Values:
On and Stopped LEDs will turn on.
Press Test key once, the LCD will display:
The LCD will display:
TEST/MAINTENANCE
***OPTIONS***
COMMUNICATION
***SETTINGS***
Press Select FWD. key three times, the LCD will
display:
In order to review above page settings, press Select
FWD. key.
STORE ENABLE
DEFAULT SETTINGS
Messages are displayed on the LCD in two lines.
* Upper line describes the parameter's name.
* Lower line shows its value.
Press Store and Set Page keys simultaneously, the
LCD will display:
When Authorized key terminals are open, it is
possible to view parameters but not to change or store
them.
DATA SAVED OK
op
Note: Storing Default parameters erases all previously
updated parameters
An attempt to change a value by
,
or store
keys, will result in "Unauthorized Access" message.
To change settings, when Authorized key is closed,
o p
press
or
keys and save the new value by
pressing Store key. Once data was properly stored in
the non-volatile memory the LCD displays the 2 sec.
flash message:
DATA SAVED OK
Notes:
1. A new parameter setting becomes effective only
after storing it in the non-volatile memory. Setting
a parameter without storing, and moving to another
parameter, will return the parameter to its
previously stored value.
2. Any setpoint parameters can be viewed, altered and
stored at any time. However, it is not recommended
to change and store important parameters while the
motor is starting or running.
3. Any stored parameter is kept indefinitely in the
non-volatile memory.
8
LCD Display
Five types of information displays are available.
3. Test Messages
By pressing Test key and then Select key the LCD
displays the following headers:
1. Parameter Settings
By pressing Set Page key the LCD displays the
following headers:
TEST/MAINTENANCE
***OPTIONS***
COMMUNICATION
***SETTINGS***
RUN SELF TEST ?
PUSH (+) TO RUN
SYSTEM PARAMETER
***SETTINGS***
PROGRAM VERSION
MPC060995MODBUS
VOLTAGE
***SETTINGS***
STORE ENABLE
DEFAULT SETTINGS
CURRENT
***SETTINGS***
RESET & STORE
STATISTICAL DATA
TEMPERATURE
***SETTINGS***
4. Flash Messages
Flash messages are displayed as a response to an event.
Examples:
TRIPPING/ALARM
***OPTIONS***
DATA SAVED OK
2. Data Review
By pressing Data Page key the LCD displays the
following headers:
WRONG DATA SAVED
MEASURED DATA
-✱✱✱-
WRONG PARAMETERS
CALCULATED DATA
-✱✱✱-
DATA SAVED OK
LOGICAL INPUTS CONTACT STATUS
5. Constant Messages
Messages which are displayed upon fault.
Examples:
STATISTICAL DATA
-✱✱✱-
TRIP:
MAX START TIME
FAULT DATA
-✱✱✱-
ALARM:
THERMAL PREALARM
Notes :
1. Pressing Store key while the LCD displays an "Actual Data" parameter, will store this parameter as default display.
If no key is pressed for more than five minutes, this parameter will be constantly displayed.
2. Pressing Store key while the LCD displays a header, will store this header as the default display. If no key is pressed
for more than five minutes this header will be constantly displayed.
9
LCD Display
10
Menu Configuration
11
Menu Configuration
12
Parameter Settings
Display
COMMUNICATION
✱✱✱SETTINGS✱✱✱
Description
Drive Number
0
This parameter has no effect on
MPR operation.
(For customer convenience
only).
Range: 0 – 320
Increments of: 1
Baud Rate
9600
Serial Link communication
speed in BPS. Disconnect and
then reconnect auxiliary supply
after any change of baud rate.
Range: 1200, 2400, 4800, 9600.
Serial Link No.
248
MPR Address on Serial Link.
RS485 Allows a maximum of
32 MPRs on a twisted pair.
For
convenience
in
programming the number of
serial links is extended.
Range: 1 – 247, 248 = Off.
Increments of: 1
Common Address
1
Not Used
Common Address 1, for future
enhancement
Range: Not used / Used
Common Address
2
Not Used
Common Address 2, for future
enhancement
Range: Not Used / Used
Common Address
3
Not Used
Common Address 3, for future
enhancement
Range: Not Used / Used
13
Parameter Settings
SYSTEM PARAMETER
✱✱✱SETTINGS✱✱✱
Display
Description
Display
Description
Line Voltage
415 Volt
Rated Line to Line Mains
Voltage.
Range: 100V - 22KV
Increments of : 5V to 1KV
100V above 1KV
E/F Alarm
5% of FLC
Earth Fault current initiating
an Alarm (in % of Motor
FLC)
Increments of: 1%
VT Primary
VT not connected
Primary voltage of mains
Voltage Transformers.
Transformer should be used for
line voltages above 690V.
Range: not connected,
100V - 22KV
Increments of : 10V to 1KV
100V above 1KV
E/F Alarm Delay
10 sec.
Earth Fault Alarm Delay.
Range: 1 - 60 sec.
Increments of: 1 sec.
E/F Trip
10% of FLC
Earth Fault current initiating a
trip (in % of Motor FLC)
Range: 1-100% of Motor FLC
Increments of: 1 %.
E/F Trip Delay
0.5 sec.
Earth Fault Trip Delay.
Range: 0 - 2 sec.
Increments of: 0.1 sec.
Current Inhibit
OFF
Inhibits opening of Aux.2
(Trip) Relay when short
circuit current exceeds a set
value, to prevent contactor's
damage.
Range: 400-1000% of Motor
FLC, OFF
Increments of : 10%
Note: When only one VT is used for voltage
measurement decrease VT primary voltage setting by a
factor of) .3√eg.(1.73 .
Example : If mains voltage, line to line is 3300V and
only one VT is used, set "VT Primary"
3300/1.73 ≅1900V
VT secondary
VT not connected
Secondary voltage of mains
Voltage Transformer
Range: not connected,
95V - 660V
Increments of : 5V
Motor FLC
100 AMP.
Motor Full Load (rated)
Current.
Range: 1 - 2000A
Increments of : 1A to 100A
5A above 100A
CT Primary
100 Amp
E/F CT Primary
100 Amp.
Note : When contactors are not used to trip the motor
(circuit breaker application) set to OFF.
WARNING
The MPR will not protect the motor against high
current above the current inhibit setting. It is the
customer's responsibility to ensure that the motor is
protected against fault current, above Current Inhibit
by external protection.
Primary rated current of Current
Transformer.
(Secondary
1A
or
5A
terminals).
Range: 1 - 2000A.
Increments of : 1A to 100A
5A above 100A
Primary rated current of Earth
Fault Transformer.
(Secondary
1A
or
5A
terminals).
Range: 1 - 2000A
Increments of : 1A to 100A
5A above 100A
Note: When three C/Ts are connected in residual earth
fault connection (see page 7) the E/F CT Primary value
is the same as CT Primary value
14
Start/Stp Signal
Momentary
Not in use
Starting Method
Direct on Line
Note in use.
Parameter Settings
Increments of: 1.
SYSTEM PARAMETER
✱✱✱SETTINGS✱✱✱
Display
Description
Max Time in Star
10 sec.
Not in use
Transition Time
200 msec.
Not in use
Star to Delta at
150% of FLC
Not in use
Lo Spd
FLC
10 AMP.
Motor
Not in use
Low Spd t6x Time
10.0 sec.
Not in use
Designate AUX.1
Alarm
Enables Designation of Aux.
Relay no. 1 as Alarm- Fail
Safe operation (options other
then Alarm can not be used).
AUX.1 Delay
0 sec.
Time delay for AUX.1 relay.
Range: 0 - 120 sec.
Increments of : 1 sec.
Designate AUX.2
Trip
Enables
Designation
of
Auxiliary Relay no. 2 as:
* Trip.
* Trip - Fail Safe
(other options then the above
can not be used).
AUX.2 Delay
0 sec.
Time delay for AUX.2 relay.
Range: 0 - 120 sec.
Increments of : 1 sec.
Note: Aux. 2 delay has no
effect when configured as
Trip or Trip-Fail Safe
Protection Only
Yes
Must be configured as "Yes".
Range: Yes
No
Rated
Factor
0.880
PWR
Motor rated (Nameplate)
power factor. Required for
calculating
rated
power.
(based on Motor FLC and
Line Voltage).
Range : 0.5 - 0.99
Increments of : 0.01
KWH per PULSE
Off
When enabled, O/L relay
initiates number of KWH per
pulse.
Range : Off, 1 – 100
15
Parameter Settings
115% of Un
VOLTAGE
✱✱✱SETTINGS✱✱✱
Display
Description
U/V Setting
80% of Un
Under Voltage level, (in % of
nominal voltage). Fault occurs
when voltage is below set value
for more than U/V delay.
Range: 50 - 95 % of Un
Increments of : 1 %
Note: O/V ALARM delay is
preset to 1 sec.
O/V Trip
120% of Un
Over Voltage trip level. Fault
occurs when voltage is above
set value for more than O/V
Trip Delay.
Range: 100 - 120% of Un.
Increments of: 1%.
O/V Trip Delay
1 sec.
Over Voltage trip delay.
Range: 1 – 100 sec.
Increments of: 1 sec.
Note: MPR 2000 version D is factory set so Under
Voltage protection is also active when the motor is
stopped. (Dip Sw. 4 on CPU PCB at ON position - see
page 7)
U/V Delay 5.0sec.
Under Voltage time delay.
Range: 0.2 - 10 sec.
Increments of : 0.1 sec.
U/V Auto Restart
No.
Not in use
Restart Delay
Not in use
O/V Alarm
Over Voltage alarm level. Fault
occurs when voltage is above
set value for more than 1
second (fixed delay).
Range: 100 - 120 % of Un.
Increments of : 1%
16
Parameter Settings
CURRENT
✱✱✱SETTINGS✱✱✱
Display
Max. Start Time
10 sec.
Number
Starts
10
of
Starts Period
30 min.
Start Inhibit
30 min
U/C Alarm
50% of FLC
U/C
Alarm
Delay
2 sec.
U/C Trip
40% of FLC
U/C Trip Delay
5 sec.
Load Increase
Al
120% of FLC
Display
Description
Maximum permitted starting
time. End of starting is assumed
when motor's current decreases
below 110% of Overload Setting
value.
Example: for 105% Overload
Setting (default value), end of
starting is assumed when current
decreases below 115% of Motor
FLC.
(110% x 105%=115.5%)
Range: 1 – 250 sec.
Increments of: 1 sec.
Low Set Setting
400% of FLC
Maximum Permitted number of
starts during "Starts Period".
Alarm/Trip screens will display
"Too Many Starts"
Range: 1 - 10
Increments of : 1
Time period during which the
number of starts is counted.
Range: 1 – 60 min.
Increments of: 1 min.
Time period during which
starting is disabled after "Too
Many Starts" trip. After Start
Inhibit time, Auto Reset will
operate (if enabled), in order to
reset "Too Many Starts" trip.
Range: 1 - 60 min.
Increments of: 1 min.
Under Current alarm level. Fault
occurs when current decreases
below set parameter for more
than U/C Alarm Delay.
Range: 10-90 % of Motor FLC.
Increments of: 1%
Under Current alarm delay.
Range: 1 – 60 sec.
Increments of: 1 sec.
Under Current trip level. Fault
occurs when current decreases
below set parameter for more
than U/C Trip Delay.
Range: 10 - 90% of Motor FLC.
Increments of : 1%
Under Current trip delay.
Range: 1 - 60 sec.
Increments of: 1 sec.
Load Increase Alarm. Fault
occurs when current increases
above set parameter for more
than fixed time period of 5 sec.
Description
Range: 60-150% of Motor FLC.
Low Set current - Stall / Jam
protection. Operative after start
process ended. Indicates that
current exceeded set value for
more than Low Set Delay.
Range:100-500%of Motor FLC.
Increments of : 10%
Low Set Delay
2.0 sec.
Time delay for Low Set current.
Range: 0.5 - 10 sec.
Increments of: 0.5 sec.
High Set Setting
800% of FLC
High Set Current - Short circuit
protection. Operative during
starting and running. Indicates
that current exceeded set value
for more than High Set Delay.
Range:400-1200%of Motor FLC
Increments of: 10%
Time delay for High Set current.
Range: 0 - 4 sec.
Increments of: 0.1 sec.
Note: When set to 0, actual delay is less than 70
msec.
High Set Delay
2.0 sec.
Overload Setting
105% of FLC
Lower threshold for O/L
protection
Range: 60 – 130 % of Motor
FLC.
Increments of : 1%
Thermal Alarm
80% of Capacity
Thermal Capacity alarm value.
Range: 50 - 99 % of maximum
thermal capacity.
Increments of : 1%
t6x Time
10.0 sec.
Overload trip time of cold motor
at 6 times Motor FLC. (The time
required to heat Thermal
Capacity from 0 to 100 % at 6 x
FLC).
Range: 0.5 - 120 sec.
Increments of : 0.5 sec.
Hot/Cold
50%
17
Ratio
The ratio between thermal
Capacity available for starting a
hot motor and thermal capacity
available for starting a cold
motor. (A higher setting allows
for a longer starting time of hot
motor before tripping).
Range:20-100% of Thermal
Capacity
Increments of: 1%.
Parameter Settings
CURRENT
✱✱✱SETTINGS✱✱✱
Display
Cool
Factor
5
Time
Stall Time Fact.
50%
TEMPERATURE
✱✱✱SETTINGS✱✱✱
Description
The Ratio between cooling time
constant of stopped motor to the
heating/cooling time constant of
running motor.
Range: 1 - 15
Increments of: 1
Display
Ch. 1 2 3 Sensor
RTD
Description
Determines
type
of
Temperature sensor (when
used) for channels 1, 2 and 3.
Range: Thermistor
RTD (PT100)
See DIP SWITCH selection to display °C or
6)
Stall Time Factor. The ratio
between motor thermal time
constant when speed switch is
closed (indicating slow speed) to
thermal time constant with open
speed switch - (indicating high
speed). Operative when speed
switch is used.
Range: 20 - 100 %
Increments of: 1%
Selects Auto or Manual resetting
method after thermal capacity
decreases below 50%.
Auto: Automatic resetting
Hand: Manual resetting
Range: Hand / Auto.
Note: O/L Reset Method can also be set through
Tripping/Alarm Page, the latest setting will be valid.
Unbal. Current Unbalance Current trip level.
Fault occurs only if actual
(Trip)
15% of FLC
Unbalance is greater than the set
value. See figure 6 for time delay.
Range: 10 - 40 % of Motor FLC.
Increments of : 1%
Notes :
1. Unbalance Current (Alarm) automatically sets
itself to 50% of "Unbalance Current" trip, (figure 6 for
time delays)
2. Unbalance Current alarm will be activated when
Unbalance Current exceeds 50% of the Unbalance
Current trip level for more than 1 second (fixed time
period).
Unbal.
Max. Unbalance curve selection. Time
delay at 10 % of Unbalance. Fault
Time
30 sec.
time inversely relates to the actual
unbalance (See page 28).
Range: 20 - 120 sec.
Increments of: 1 sec.
Under power level. In percent of
Under Power
25%
rated power.
Range : 5 - 99%
Note: Rated Power is calculated through:
P = * 3√Line Voltage * Motor FLC * Rated Power
Factor
Under
Power Under Power time delay.
Range: 1 - 120 Sec.
Del.
30 Sec.
Increment of: 1 Sec.
(pg.
Thermistor Type
NTC (-Ve)
Determines the type of
thermistor (In case Thermistor
was selected above).
Range: NTC (-Ve)
PTC (+Ve)
Ch. 1 2 3 Alarm
140 °C
Alarms when actual resistance
(Temperature)
increases
above the set value.
Range : 100 - 240 or
0 – 200 °C.
Increments of: 1 or 1°C
Channel 4 Alarm
140 Ohm
Alarm values - channel 4.
Same as CH. 1 2 3 Alarm.
Note: Channel 4 can be
connected only to sensor of
type RTD.
Channel 5 Alarm
140 Ohm
Alarm values - channel 5.
Same as CH. 1 2 3 Alarm.
Note: Channel 5 can be
connected only to sensor of
type RTD.
Channel 1 2 3
Trip
150 °C
Trips when actual resistance
increases above the set value.
Range: 100-240 or
0 – 200 °C
Increments of : 1 or 1°C
Channel 4 Trip
150 °C
Trip value for channel 4. See
previous explanation for CH.
1 2 3 Trip.
Channel 5 Trip
150 °C
Trip value for channel 5. See
previous explanation for CH.
1 2 3 Trip.
O/L
Reset
Method Hand
Notes :
1. Channels 4 and 5 are for RTD's only.
2. RTD functions have a fixed time delay of 2 Sec.
3. Open (unconnected) RTD causes Alarm fault
while Trip fault is blocked.
18
Tripping/Alarm Options
TRIPPING / ALARM
✱✱✱OPTIONS✱✱✱
FUNCTIONAL ASSIGNMENT
Protection function
Each of the MPR Protection can be assigned to each of
the following functions :
1. Trip only
2. Alarm only
3. Alarm and Trip
4. Disabled
1.
Trip only -
Set Trip:
Set Alarm:
Resetting
Each MPR Protection can be assigned to any of the
following functions:
1. Auto Reset
2. Panel Reset
3. Communication Reset
(See notes on page 35 and Communication
Manual)
Enable
Disable
1. Auto Reset -When required Set"Auto Rst: Enable"
If not required Set "Auto Rst: Disable"
The MPR resets itself automatically when the fault
cause disappears. The Auto Reset is activated after a
2-sec. delay.
Upon fault:
Trip LED illuminates.
Aux.2 Relay: if designated "Trip", energizes. if
designated to "Trip - Fail Safe", de-energizes.
•
•
2.
Alarm only-
Set Trip:
Set Alarm:
Disable
Enable
Upon fault:
Alarm LED illuminates.
Aux.1 Relay, if designated to
de-energizes (Fail-Safe operation).
•
•
3.
•
•
•
4.
Note: It is recommended to always Disable
Auto Reset.
On some faults, when Auto Reset is enabled, the
MPR trips and after a 2-sec. delay resets itself
automatically. The fault message on the LCD
disappears after 2 sec.
Example: On "U/C Trip", when Auto Reset function
is Enabled, the contactor opens. After 2 sec.
automatic Reset occurs. The motor stops and the
"U/C Trip" message is displayed for only 2 sec.
"Alarm",
Alarm and Trip- Set Trip:
Enable
Set Alarm: Enable
Upon fault:
Trip and Alarm LEDs illuminate.
Aux.1 Relay, if designated to "Alarm",
de-energizes.
Aux.2 Relay, if designated to "Trip", energizes.
If designated to "Trip - Fail Safe", de-energizes.
Disable-
Set Trip:
Set Alarm:
2. Panel Reset - Set Panel RST: EN.
When Panel resetting is not permitted set Panel RST:
DIS. For critical faults, such as "Overload" and
"Earth Fault", it is good practice to prevent Panel
Resetting.
An authorized person (key holder) can always reset
any fault.
Disable
Disable
Notes:
If Authorized Key is locked, front panel Resetting is
active when:
a. Panel Reset parameter is "enabled", and
b. Local/Remote input is in "Local" mode, and
c. There is no Start signal.
3. PLC Reset - Not in use.
19
Tripping/Alarm Options
2. Too Many Starts
Fault occurs when number of starts exceeds
"Number of Starts" setting during "Starts Period"
time.
Auto Reset, when Enabled, occurs after "Start
Inhibit" time elapsed
3. Under Current Pre-Alarm
(U/C PRE-ALARM)
For a running motor, fault occurs when current
decreases below "U/C Pre-Alarm" setting for a time
longer than "U/C Alarm Delay" setting.
Auto reset, when Enabled, occurs when the current
increases above "U/C Pre-Alarm" level, or when
motor stops or trips.
1. Maximum Start Time
Fault occurs when starting time is longer then
"Maximum Start Time" setting. The MPR assumes
end of starting process, when motor current
decreases below 110% of the "Overload Setting"
value.
For a default value of 105%, end of starting process
is detected at 115% of motor Full Load Current
(FLC).
Note: The following describes the four options
available for Max Start Time (Trip, Alarm, Auto
Reset, Panel Reset).
The same options with their settings are applicable for
all
other faults.
Display
Description
Max. Start Time
Trip: Disable
When Enabled, and in case of
starting time exceeds "Max
Start Time" setting, the
internal relays A and B will
open,
opening
motor
contactors.
If
"Designate
Aux.2"
parameter was set to Trip,
Aux.2 relay energizes.
If
"Designate
Aux.2"
parameter was set to Trip Fail Safe, Aux.2 relay
de-energizes. Trip condition is
latched. Reset can be done
using any Reset method.
Range: Disable
Enable
Max. Start Time
Alarm: Enable
4. Under Current Trip (U/C TRIP)
For a running motor, fault occurs, when current
decreases below U/C Trip setting for a time longer
than U/C Trip Delay setting.
Auto reset, when Enabled, occurs when the current
increases above U/C Trip level, or when motor
stops or trips.
5. Load Increase Alarm (LOAD INCREASED)
Operative only after start process ended (after
current decreased below 110% of "Overload
Setting" value). Fault occurs when motor average
current is above "Load Increase Alarm" setting for
more than 5 seconds .
Auto reset, when Enabled, occurs when current
decreases below the Load Increase Alarm setting,
or when motor stops or trips.
6. Low Set Overcurrent (LOW SET O/C)
Identifies Stall condition for a "running" motor.
Fault occurs when starting process has ended and
motor average current increases above Low Set
Setting value for more than "Low Set Delay" time.
Auto reset, when Enabled, occurs when current
decreases below "Low Set Setting" level, or when
motor stops or trips.
When Enabled, and in case of
starting time exceeds Max
Start Time setting, Aux.1
relay
de-energizes (if
Designate Aux.1 parameter
was set to Alarm). Alarm
condition is latched. Reset can
be done using any Reset
method.
Range: Disable
Enable
Max Start Time
Auto RST: DIS.
When Enabled, Automatically
resets Max Start Time fault
after motor stops, enabling
restarting.
Range: Disable
Enable.
Max Start Time
Panel RST: En.
When Enabled, allows front
panel resetting.
Range: Disable
Enable.
7. High Set Overcurrent (HIGH SET O/C)
Identifies short circuit condition. Fault occurs when
any of the motor's line currents exceeds "High Set
Setting" value, for more than "High Set Delay"
time.
Auto reset, when Enabled, occurs when current
decreases below High Set Setting value, or when
motor stops or trips
Notes:
1. True RMS line currents are measured,
disregarding the average "DC" value. It is
designed to prevent nuisance tripping at the
very beginning of the starting process
(during which DC decaying current is
superimposed on the AC Current).
2. Minimum setting of "High Set Delay" is 0.
At 0 setting, the actual time delay is less than
70 mSec.
20
Tripping/Alarm Options
Example: If Hot/Cold Ratio is set to 60%, then for a
"Hot" motor, 40% of the "Thermal Capacity" were
used, leaving 60% for additional heating.
For a motor, running for prolonged time, at lower
than "Overload Setting" current value, the "Thermal
Capacity" is related to the square of the current.
For Example, if motor current is only ½ of the
Overload Setting level, then (K=(½)²*40%=10%)
only 10% of the "Thermal Capacity" has been used,
leaving 90% for additional heating.
3. "High Set Overcurrent" trip is prevented
when the highest of any of the line currents
exceeds Current Inhibit setting. It is designed
to prevent opening of motor contactor under
high short circuit conditions to protect it's
contacts from being damaged. Fault display:
"High Set O/C".
4. Overload Trip overrides current inhibit setting.
8,9. Thermal Prealarm and Thermal Trip
The MPR simulates the thermal condition of the
motor and stores it in a thermal register. The
"heating" of the thermal register (i.e. it's increment)
is related to the square of the current (the highest of
the three line currents). The rate of "cooling" of the
thermal register (i.e. it's decrement) is directly
related to the motor's present Thermal condition.
The content of the thermal register is called
"Thermal Capacity" simulating motor temperature.
Thermal capacity of 100% is equivalent to a motor
running at the absolute maximum allowed
temperature. At this point the motor must be
tripped.
"Thermal Trip" is defined by the t6x setting.
"Thermal Prealarm" have a range of 50-99% of
"thermal Trip".
The following parameters are used to calculate the
"Thermal Capacity".
Cool Time Factor
The ratio between the cooling time constant of a
stopped motor and heat/cool time constant of a
running motor.
Stall Time Factor
The ratio between motor thermal time constant
when speed switch is closed (indicating slow speed)
to thermal time constant (an open speed switch indicating high speed). Operative when speed
switch is used.
Range: 20 - 100 %
Increments of: 1%
Speed Switch
Not in use
Thermal Capacity Reset Method
Due to the importance of the Thermal protection a
different reset method is used.
Reset of Thermal Prealarm is prevented until
Thermal Capacity "cools down" below 50 % of
motor thermal capacity.
Overload Setting
Thermal trip is not possible as long as current is
below the "Overload Setting" value. For a standard
motor, leave "Overload Setting at it's default value
of 105%. When current increases above this value a
trip will occur after some time. This time depends
on the present value of the "Thermal Capacity" on
the current level and on "t6x Time" parameter.
If urgent starting is needed before thermal capacity
has reduced below 50% press Reset key twice
within 1 second, which will reset the thermal
register back to 0.
t6x Time
Tripping time of a "Cold" motor carrying a current
of 6 times FLC (when "Overload Setting" value is
set to 105%). See figure 4 and 5.
Notes:
1. It is impossible to reset a "Thermal Trip"
condition until "Thermal Capacity " has
reduced below 50%.
2. Only "Authorized key" holder can reset the
Thermal Capacity. It is not possible to reset
thermal capacity through PLC hard wires
and communication.
3. If no data is available from the motor
manufacturer, it is recommended to leave all
the above parameters to their default values.
The last value of the Thermal Capacities
stored in the non-Volatile memory during
auxiliary supply failure or disconnection. On
restoration of supply, the previous value will
be re-established. Figures 4 and 5 specify
overload trip time delay for several cases.
Thermal Pre-alarm fault display: "Thermal
Prealarm". Thermal trip fault display :
"Thermal Trip".
4. "Thermal Trip" overrides "Current Inhibit"
settings.
Hot/Cold Ratio
This parameter, determines the ratio of the
available "Thermal Capacity" for a Hot motor and a
Cold motor.
The "Thermal Capacity" of a hot motor, is:
(100% - Hot/Cold Ratio)
Cold Condition - When the motor is stopped for a
long time, it's "Thermal Capacity" is zero.
Therefore, for a cold motor, all the 100% of
"Thermal Capacity" are available for heating
(before a trip occurs).
Hot Condition - When a motor is running, it's
temperature increases, and after it has been running
for a long time at a current, slightly below the
Overload Setting value, a "Hot Condition" has been
created. Now, less than 100% of the "Thermal
Capacity" is available.
21
Tripping/Alarm Options
Enabled, occurs when average line voltage
decreases below Overvoltage Alarm value, or when
motor stops or trips.
10. Unbalance Alarm
Current unbalance is the difference between
maximum and minimum values of the motor's three
line currents, divided by the larger motor's
maximum line current or Motor FLC. This method
prevents nuisance alarming at low currents. The
MPR automatically initiates an alarm, one second
after the actual unbalance value increases above
50% of "Unbalance Current Trip" setting.
Auto reset, when Enabled, occurs when the actual
unbalance decreases below 50% of "Unbalance
Current Trip" setting, or when motor stops or trips.
15. Phase Loss
The MPR calculates voltage unbalance according to
the difference between maximum and minimum
values of the line to line voltages, related to the
"Line Voltage" setting. Fault occurs when the
unbalance level exceeds 20% for more than 2
seconds.
Auto reset, when Enabled, occurs when the actual
Unbalance decreases below 20%.
11. Unbalance Trip
Unbalance Current setting determines the minimum
value of calculated unbalance for tripping.
If the actual unbalance exceeds Unbalance Current
setting, a time delay is initiated. The time delay is
related to Unbal. Max. Time parameter, and to the
inverse of the square of the actual unbalance
(smaller delay for larger unbalance). Minimum
value of the time delay is 1 second.
Auto reset, when Enabled, occurs when the actual
unbalance decreases to below Unbal. Current
setting or when motor stops or trips.
Use figure 6 (page 28) to select the required trip
time for any unbalance value. Select the required
tripping time at 10% unbalance (on the Time axis
between 20 and 120 sec). Draw a line, beginning at
the selected point of your time axis towards the
unbalance percent line, parallel and between the
20sec and 120sec lines.
Example: Selecting 80 seconds delay at 10%
unbalance will cause a Trip at 40% unbalance after
5 seconds delay.
12. Undervoltage
Operative after start signal Fault occurs when the
average of the three line to line voltages decreases
below "U/V Setting" value, for more than "U/V
Delay" setting. It is possible to connect single
phase voltage to the line voltage inputs (terminals
33, 34, 35) and link them together (see page 6 Line Voltage).
Auto reset, when Enabled, occurs when average
line voltage increases above the U/V Setting value,
or when motor stops or trips.
13. Over Voltage Pre-Alarm
(O/V PRE-ALARM)
Operative only after motor is started. Fault occurs
when the average of three line to line voltages
increases above "O/V Alarm" setting, for more than
1 second.
Auto reset, when Enabled, occurs when average
line voltage decreases below "U/V Alarm" value, or
when motor stops or trips.
16. Phase Sequence
Always operative. Fault occurs when the phase
sequence is reversed for more than 2 seconds.
Disable Phase Sequence both for Trip and for
Alarm, if only a single phase is connected to the
voltage input terminals.
Auto reset, when Enabled, occurs when a correct
phase sequence is detected.
17,18,19. Temperature Pre-Alarm
(TEMP n PREALARM) n=1-5
High temperature condition is detected according to
the measured resistance of the temperature sensors
(RTD or Thermistor). RTD is a positive
temperature coefficient device. Thermistor,
however, can be either a positive (PTC) or negative
(NTC) temperature coefficient type.
For RTD or PTC Thermistor, temperature
pre-alarm level is detected when the measured
resistance of any channel exceeds it's pre-Alarm
setting.
For NTC Thermistor, temperature pre-alarm level is
detected when measured resistance is below it's
Channel Alarm setting. Fault occurs, when
temperature, of any channel, exceeds the pre-alarm
value for more than 1 sec. Auto reset, when
Enabled, occurs when the temperature decreases to
below the Pre-Alarm level.
Notes:
1.
or C is selected by removing rear panel
to set dip switch on CPU board,
SW1.3 = ON (RTD only)
2. Refer to page 25 for conversion table
between and C
14. Over Voltage Trip
Operative after start signal. Fault occurs when the
average line to line voltage increases above
"Overvoltage Trip" setting, for more than
Overvoltage Trip Delay setting. Auto reset, when
22
Tripping/Alarm Options
28. Control Circuit Open
Not in use
20,21,22 Temperature Trip
(TEMP n TRIP) n=1-5
See previous paragraph on Temperature Pre-Alarm.
For RTD or PTC Thermistor, temperature trip level
is detected when measured resistance of any
channel exceeds it's Channel Trip setting.
For NTC Thermistor, temperature trip level is
detected when measured resistance is below it's
Channel Trip Setting. Fault occurs, when
temperature, of any channel, exceeds the trip value
for more than 0.5 sec.
Auto reset, when Enabled, occurs when the
temperature decreases below the trip level.
29.Welded Contactor
Not in use
30. External Fault 2
Not in use
31. External Fault 3 (Test)
Not in use
32,33. RTD 4 & 5 Temperature Pre-Alarm
(TEMP 4 PREALARM) (TEMP 5 PREALARM)
High temperature condition is detected according to
RTD measured resistance. Fault occurs, when
measured resistance of any channel exceeds it's
Channel Pre-Alarm value for more than 1 sec.
Auto reset, when Enabled, occurs when RTD
resistance decreases below the pre-alarm level.
23. Earth Fault Pre-Alarm (E/F PRE-ALARM)
Fault occurs when Earth current exceeds "E/F
Alarm" setting for more than "E/F Alarm Delay"
setting.
Auto reset, when Enabled, occurs when Earth
current decreases below "E/F Alarm" setting.
24. Earth Fault Trip (E/F TRIP)
Fault occurs when Earth current exceeds "E/F Trip"
setting for more than "E/F Trip Delay" setting.
Minimum setting of "E/F Trip Delay" is 0. At 0
setting, the actual time delay is less than 70 msec.
Auto reset, when Enabled, occurs when Earth
current decreases below "E/F Trip" setting.
34,35. RTD 4 & 5 Temperature Trip
(TEMP 4 TRIP) (TEMP 5 TRIP)
High temperature condition is detected according to
RTD measured resistance. Fault occurs, when
measured resistance of any channel exceeds it's
Channel Trip value for more than 0.5 sec. (factory
set).
Auto reset, when Enabled, occurs when the RTD
resistance decreases below the trip level.
Note: "E/F Trip" is prevented when the highest of
any of the line currents Exceeds "Current
Inhibit" value It is designed to prevent
opening of motor contactor under high short
circuit conditions, to protect it's contacts
from being damaged.
25. Serial Port Failure
(SER. PORT FAILURE)
Fault occurs when the MPR detects three
consecutive transmissions from the host computer,
in which a parity bit, and/or the CRC word are
wrong.
Auto reset, when Enabled, occurs when a
transmission from the host computer is received
properly.
Note: Input 4 & 5 can be only RTD's.
26. Internal Failure
The MPR incorporates a Built In Test program.
Operating the self-test program is done from a
special "Test/Maintenance Options" page. "Self
Test Passed" message, after completion of the built
in test, indicates that the MPR functions properly.
"Self Test Failed", together with an error code (for
factory use only) and Internal Fault LED "ON"
indicates a fault condition.
Auto reset, when Enabled, occurs when a
successful test was performed and its result is "Self
Test Passed" message.
27. External Fault 1
Not in use
23
Tripping/Alarm Options
36. Under Power
For a running motor, fault occurs when motor
power decreases below "Under Power" settings for
a period of time longer than "Under Power Delay"
settings.
Auto reset, when Enabled, occurs when the power
increases above "Under Power" level or when
motor stops or trips.
Note: All Power measurements and protection
depend upon MPR receiving all 3 line voltages and
currents.
Resistance-Temperature-Device
Conversion Table (Pt.100=Platinum 100 )
TEMP IN
Pt.100 OHMS ( )
( C)
(DIN 43760)
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
100.00
103.90
107.79
111.67
115.54
119.40
123.24
127.07
130.89
134.70
138.50
142.29
146.06
149.82
153.58
157.32
161.04
164.76
168.46
172.16
175.84
Note: Maximum cable resistance allowed must be
25% of RTD resistance.
More than One Alarm or Trip
The MPR is designed to accept and store the first
alarm it detects. If this alarm has not been reset and
an additional alarm occurs, the MPR will not
display the second alarm on the LCD nor assign it
to the Fault Data page.
Example: If "Unbalance Alarm" occurs and then a
"Thermal Pre-alarm" occurs, the MPR will continue
displaying "Unbalance Alarm" message on both,
LCD and Fault Data page. This is to assist the user
in establishing the cause of the alarm.
In case a trip occurs after an alarm, the trip message
will override the alarm message.
24
Tripping/Alarm Options
Figure 4 - Overload Protection - Cold Motor
25
Tripping/Alarm Options
Figure 5 - Overload Protection - Hot Motor (hot/cold ratio = 0.5)
26
Tripping/Alarm Options
Figure 6 - Unbalance Protection
Unbalance Level Value Selection:
1. Select the required trip/alarm time on the vertical axis (at 10% Unbalance).
2. Draw a horizontal line at the selected point (eg. 5 Sec.).
3. Select an unbalance point (eg. 40%).
4. Draw a vertical line at the selected point (the two lines intersect).
5. Draw a parallel line to the diagonal lines at the intersection point.
6. The new parallel line will intersect with the vertical axis (at 10 % Unbalance).
7. Insert the value of the time at the intersection point (from 6) into parameter "UNBAL. MAX TIME" (eg. 80
sec).
27
Tripping/Alarm Default Settings
The following table summarizes the five factory default settings for each of the faults, and describes when is each fault
active.
Notes: It is recommended that prior to modifying this table, create a photocopy and do not scribe on the original. Mark
your settings in the empty space available for each value. For operation in "Protection Only" mode, disable all PLC reset
faults.
MOTOR NUMBER (___________), APPLICATION NAME (________________________________)
In this table, (+) stands for "Enabled", (-) for "Disabled".
Fault No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
Max Start Time
Too Many Starts
U/C Pre-Alarm
U/C Trip
Load Increased
Low Set O/C
High Set O/C
Thermal Prealarm
Thermal Trip
Unbalance Alarm
Unbalance Trip
Undervoltage
O/V Pre-Alarm
O/V Trip
Phase Loss
Phase Sequence
Temp. 1 Prealarm
Temp. 2 Prealarm
Temp. 3 Prealarm
Temp. 1 Trip
Temp. 2 Trip
Temp. 3 Trip
E/F Pre-Alarm
E/F Trip
Ser. port Failure
Internal Failure
External Fault 1*
Control Cir. open*
Welded Contactor*
External Fault 2*
External Fault 3*
Temp. 4 Prealarm
Temp. 5 Prealarm
Temp. 4 Trip
Temp. 5 Trip
Under Power
Pages in
manual
Trip
Alarm
Auto
Reset
Panel
Reset
Plc*
During
Active Code
ANSI
21, 17
"
"
"
"
"
22, 17
"
22
23, 18
"
23, 16
"
"
23
"
19, 24
"
"
19, 24
"
"
15, 24
"
24
"
(-) (
(-) (
(-) (
(-) (
(-) (
(+)(
(-) (
(-) (
(+)(
(-) (
(+)(
(-) (
(-) (
(+)(
(+)(
(+)(
(-) (
(-) (
(-) (
(-) (
(-) (
(-) (
(-) (
(+)(
(-) (
(-) (
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
(+)
(- )
(+)
(- )
(+)
(+)
(- )
(+)
(+)
(+)
(+)
(+)
(+)
(+)
(+)
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Start
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Always
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Run + Start
Run + Start
Run + Start
Always
Always
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Always
Always
Always
Always
Always
Always
Always
Always
Always
48
66
37
37
51L
51R
50
49S/51
49S/51
46
46
27
59
59
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49R
49R
49R
49R
49R
49R
50G, 64
50N, 64
03
19, 24
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18, 25
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Always
Always
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Run
49R
49R
49R
49R
37
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Additional options available in the MPR which correspond to ANSI codes
Lock-Out on thermal Trip
Controller Time Delays
Annunciator
* Not in use
28
86
02, 03
30
Actual Data
MEASURED
✱✱✱DATA✱✱✱
CALCULATED
✱✱✱DATA✱✱✱
Note: Values given below are examples only.
Display
Description
Vp1 Vp2 Vp3
240 240 240 V
Phase to Neutral voltages.
Range: 100V - 12.7KV.
VL12 VL23 VL31
415 415 415 V
Line to Line Voltages.
Range: 100V - 25KV.
I1
I2
I3
345 343 346 A
Line (motor) currents.
Range: 1A - 24KA.
Earth Fault Cur.
0 Amp.
Earth fault current.
Range:1A - 2000A
Power
48.9KW
Total motor power.
Range : 0 - 30MW.
Power Factor
0.89
Total (Average of three
phases) motor power factor.
Range : 0.0 - 1.00
T1 T2 T3
120 120 120 °C
RTD/Thermistor measured
resistance. RTD Can be
presented as or °C.
Range:
For RTD 100 - 240
or 0°C - 200°C
Thermistor 100 -30,000
T4 T5
120 120
RTD measured resistance.
RTD Can be presented as
or °C.
Range: For RTD only :
100-240
or 0°C - 200°C
°C
Display
Description
Motor current as a percentage
of Motor FLC.
Range: 0-1200% of Motor
FLC
Thermal Capacity Thermal register capacity
20% of Capacity
Trip level = 100%
Range: 0-250% of max.
Thermal Capacity
Expected time to trip at the
Time to Trip
No Trip Expected
present current value that is
above overload setting.
Range: No trip expected 0-4
hrs
Expected time to start,
Time to Start
0 sec.
displayed in one of the
following cases:
* After "Thermal Trip". This
is the expected time of the
Thermal Capacity to decay
to 50% of the maximum
"Thermal Capacity".
* After "Too Many Starts"
Trip. In this case maximum
value of "Time to Start"
equals "Start Inhibit" Time.
Range:
After "Thermal Trip": 0 - ...
min
After "Too Many Starts": 1-60
min
Unbalance
current,
the
Unbalance Curr.
1%
difference between max. and
min. of motor's three line
currents, related to the larger
between motor's max. line
current and Motor FLC.
"Time to Trip" The expected time until motor trips.
(i.e. the time to reach 100% of Thermal Capacity if
the present current value is maintained). This value is
calculated and displayed on the LCD. The host
computer may read this value through the serial link,
and takes corrective actions.
Motor Load 90 %
of FLC
Note: All Power measurements and protection depend
upon MPR receiving all 3 line voltages and
currents.
"Time to Start" The expected time until it is
possible to re-start after Thermal Trip or Too Many
Starts. (i.e. the time to reach 50% of Thermal
Capacity). This value is calculated and displayed on
the LCD.
Reset of the Thermal Capacity (different from
Thermal Trip Reset), overriding time delay for
re-starting, can be done only if Authorized Key is
Enabled. Pressing Reset on front panel while
Authorized Key is Enabled, displays "Reset Thermal
Capacity???" message. Pressing Reset again within 1
second resets the Thermal Capacity.
29
Actual Data
LOGICAL INPUTS
CONTACT STATUS
STATISTICAL
✱✱✱DATA✱✱✱
It is possible to check the of logical input status. Used
for checking system wiring for maintenance and
debugging purposes.
Display
Description
Drive Status
Available if:
* Motor is stopped.
* There is no active trip.
* Stop contact is closed.
* Interlock and Isolator
inputs
are not locked out.
Note: In "Protection Only"
mode, Stop, Interlock and
Isolator inputs have no effect.
Range: Available
Running
Not Available
Speed Switch
Open
=
High
Speed
Not in use
Authorized Key
Open = Locked
Authorized Key input contact
status. Range: Open
=
Locked
Closed = Unlocked
External Fault 1
Open = Stop
Not in use
External Fault 2
Open = Stop
Not in use
External Fault 3
Open = Stop
Not in use
Note: The following values are examples only.
Display
Description
Total Run Time
10137.5 hours
Total
run
time
since
commissioning.
Range: 0-30,000 hours.
Total # of Start
1017
Total number of starts since
commissioning.
Range: 0-65535
Total # of Trips
12
Total number of trips since
commissioning.
Range: 0-65535
Last St. Period
5 sec.
Last start time duration.
Range: 0-255 seconds.
Last St. Peak I
350 amp.
Peak current (highest of three
phases) during last start.
Range: 0-24000 Amp.
Energy*
234 KWH
Total Energy accumulated
since last statistical data reset.
* Available on special order
30
Actual Data
FAULT
✱✱✱DATA✱✱✱
Display
Description
Last Trip
Temp. 1 Trip
Last active fault that was
Enabled as a Trip.
Range: all 31 faults.
Last Alarm
Temp. 1 Alarm
Last active fault that was
Enabled as an Alarm.
Range: all 31 faults.
Trip I1, I2, I3
110 112 109 A
Values of three line (motor)
currents at time of last trip.
Range: 0-24000 amp.
Trip I0
0 amp.
Values of Earth Fault current
at time of last trip.
Range: 0-24000 amp.
Trip V1, V2, V3
277 277 277 V
Values of phase to neutral
voltages at time of last trip.
Range: 0-25000 volt.
31
Test Messages
Test page
Test page can be used for initiating a built-in test procedure, displaying program version, storing factory default
parameters into the non volatile memory, and for resetting and storing statistical data (when Authorized key is enabled).
Unauthorized personnel can only view test screens.
TEST/MAINTENANCE
✱✱✱OPTIONS✱✱✱
Display
Description
Run Self Test ?
Push (+) to Run
Press
key to initiate the
built in test procedure.
Program
Version
Program version description.
Store Enable
default settings
Stores All factory default
parameters in the non-volatile
memory. Press Store and Set
Page keys simultaneously, to
store. "Data Saved Ok" message
will be displayed for about two
seconds.
Reset & Store
Statistical Data
Resets and stores "0" for all the
statistical data.
Press Reset and Data Page
keys simultaneously, to reset
and store zero values in the
non-volatile memory.
The parameters are:
* Total run time
* Total # of starts
* Total # of trips
* Last start period
* Last start peak I
* Last trip and pre-alarm
voltages and currents
"Data Saved ok" message will
be displayed for about two
seconds.
o
MPC060995Modbus
Warning
Resetting Statistical Data resets all previous
statistical data values ! ! ! The last two actions
(default storing and resetting statistical data ) should
be done with care, since retrieving previous setpoint
parameters or statistical data is impossible.
32
Flash Messages
Constant Messages
Display
Description
The message is displayed for a short while only.
Display then returns to the previous message. Flash
messages are usually displayed as a response to an
operator action.
It is used either to confirm activation of the requested
operation, or to indicate reason for not doing so.
Display
Description
Displayed, as a response to an event and not as a result
of an operator action.
Flash messages are :
Data Saved OK
Wrong
Saved
Data
Displayed after pressing Store
key. If an error is found
during store process, then
following message is shown.
Displayed when an error is
found in the store process.
Wrong
Parameters
Displayed after power-up, if
the non-volatile parameter
check sum is found to be
wrong.
Unauthorized
Access
Displayed after trying to
Store, Reset or change value
of
parameters
while
Authorized Key is open
(locked)
Displayed as a response to
pressing Reset key while
Authorized Key is closed
(unlocked). It indicates that a
second press on Reset key
within 1 Sec. will reset
thermal capacity to 0.
Note : This should be done with care !! Resetting
Thermal Capacity may prevent the MPR from
tripping for thermal overload while justified.
Reset Thermal
Capacity ???
Thermal Capacity
Reset Performed
Displayed after second press
on Reset Key, as explained in
the previous message.
Unable to Start
Check System
Not in use.
Self Test Passed
Displayed as a response to
running the built-in test
procedure, provided all other
tests were "O.K.".
Self Test Failed
Error Code = 32
Displayed as a response to
finding an error during the
operation of Test procedure.
Error code should be reported
to
Authorized
Factory
representative.
33
Hard-Wired Start
Not in use
Hard-Wired Stop
Not in use
Alarm:
Thermal Prealarm
Displayed when the Alarm LED
illuminates. The lower line
displays the fault name.
Trip:
Thermal O/L Trip
Displayed when the Trip LED
illuminates. The lower line
displays the fault name.
Communications
The MPR is equipped with a powerful data
communication system, operating beyond a motor
protection controller into the realm of a complete
motor management system.
This communication system is unmatched in its
reliability, flexibility and ease of use providing the
ideal basis for the design of a modern motor
management system.
The system also performs high-speed data acquisition
Users therefore have a simple and friendly means of
building a fully integrated monitoring and control
systems.
The MPR incorporates RS485 serial link and uses a
MODBUS RTU protocol (The protocol is not included
in this document) to provide high speed data
acquisition to supervisory computers.
Data formats have been carefully structured to provide
fast notification of alarms and continuous updates of
performance parameters.
Load control can be
performed from host computers or by PLCs.
Small System
MPR basic configuration with any host computer,
available protocols : 1. MODBUS RTU (binary)
2. SOLCON Note: Terminate
serial link cable with 120 Ohm
resistors at both ends.
System security is exceptionally high, meeting the
highest standards of protected communication in the
industry. Included in each message is a 16 bit CRC.
The following information and control can be accessed
through the communication.
* All Actual data parameters
* All MPR Settings (Read & Write)
* All the control commands (such as Start A, Start B,
Stop etc.)
* Reset
The MPR system is user expandable. No special
engineering skills or tools are required.
For small systems, the Host computer can
communicate directly with the MPR via a twisted
shielded pair.
For larger systems a Data Highway enables multiple
MPR connection. Up to 32 MPRs can be added on
each twisted pair of the Host serial link with full access
to all MPR's.
Large System
34
Technical Specification
Auxiliary Power Supply
Ac Power Supply:
Switch set to 115 VAC: 80 - 135VAC
Switch set to 230 VAC: 160 - 270VAC
Frequency: 45 to 65Hz.
Dc Power Supply:
Low voltage version: 19 - 60VDC.
High voltage version: 85 - 300VDC.
Power consumption: ≤ 20VA
Phase Current Inputs (three currents)
Method:
True rms, sample time 0.5ms.
Range:
0.05 to 12 * phase CT Primary amps setting.
Full scale:
12 * phase CT Primary amps setting.
Accuracy:
± 1.5%, for 0.9 to 1.5 * CT Primary amps setting.
± 5% above 1.5 * CT Primary
± (3% + 0.02 * CT Primary) below 0.9 * CT Primary
Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100m )
≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20m )
Earth Fault Current Inputs (one current)
Method :
True rms, sample time 0.5mS.
Range:
0.05 to 1.0 * E/F CT Primary amps setting.
Full scale:
1.0 * E/F CT Primary amps setting.
Accuracy : ± 3% of full scale.
Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100m )
≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20m )
Line Voltage Inputs (three voltages, with or without neutral)
Method :
True rms, sample 0.5mS.
Power consumption: ≤ 0.2VA
Without VT transformer:
range:
50 - 750 volts.
Full scale:
750 volts.
Accuracy:
± 1.0% of full scale.
With VT transformer:
range:
50 - 750 volts * (VT Primary / VT Secondary), limited to 25KV.
Full scale:
750 volts * (VT Primary / VT Secondary), limited to 25KV.
Accuracy:
± 1.0% of full scale.
Thermistor / RTD Inputs (Three Thermistors/RTDs & Two optional RTDs)
Time delay:
0.5 ± 0.2 Sec.
3 Thermistors (two wires)
Range:
0.1 - 30K .
Accuracy:
± 0.1K up to 5K , ± 3% above 5K .
Overload Alarm and Trip Curves (both heating and cooling)
Fault time accuracy: ± 1 Second up to 10 seconds.
± 1 second ± 2% above 10 seconds.
Threshold current level : OVERLOAD SETTING ± 1.5%.
Total Run Time
Accuracy:
±2%.
Auto Restart Circuit
Accuracy:
±20%.
35
3 or 5 RTDs (three wires)
Range:
100 - 240 or 0°C - 200°C
Accuracy:
± 3% of resistance.
Max wire resistance:
25 .
Technical Specification
Current Unbalance Alarm and Trip
Method:
Unbalance = 100 * (Imax - Imin) / Ir [%]
Where:
Imax = max. of the three phase currents.
Imin = min. of the three phase currents.
Ir = larger of (Imax , Motor FLC setting).
(to prevent nuisance tripping at low current levels)
Alarm
Threshold unbalance alarm level: 50% of Unbal Current setting ± 2%.
Alarm (fixed) time delay: 1.0 ± 0.5 Sec.
Trip Curves
Threshold unbalance trip Level: Unbal Current setting ± 2%.
Trip time accuracy: ± 1 Second up to 10 seconds.
± 1 second ± 2% above 10 seconds.
Fault Time Delays
Accuracy:
±0.5 Sec. or ±2% of time, which ever is greater, for all but the above mentioned faults and the
following exceptions:
* High set overcurrent: When adjusted to 0 >>> 60mS ± 20mS. -0.1/+0.2Sec. up to 1 sec.
* Earth fault trip: -0.1/+0.2Sec. for less than 1Sec. delay.
Relays Contacts
Rated load
Maximum voltage
8A/250VAC 1800VA
250VAC
48Vdc, 0.25A Inductive
125Vdc, 0.15A
48Vdc, 1.0A Resistive
125Vdc, 0.4A
Dielectric Strength
1500VAC, for 1 minute, Between Ground (terminal 63) and:
* Current inputs. * Auxiliary power supply inputs - only without 1000pF suppression capacitors.
* Voltage inputs. * Control terminals - only without 1000pF suppression capacitors.
True R.M.S. Measurements
Voltage, Current, and Resistance - Sampling Speed is 0.5mSec .
Power Measurement
Method:
Range:
Full Scale:
Resolution:
Accuracy:
Two Ranges:
True RMS over three phase voltages and currents.
0.1KW - 30MW
30MW
0.1KW below 1MW, 0.01MW above 1MW.
For V 90 * VT Primary / VT Secondary & Power factor 0.5
1. For (10% < I 150%) of CT primary, accuracy is : ± (2% +0.01 * CT Primary/ Motor FLC.) of
motor rated Power
2. For ( I 150%) of CT primary, accuracy is: ± 7% of the display reading
Power Factor
Method:
Range:
Resolution:
Accuracy:
Ratio between total power (P) to total apparent power (VA).
0.0 - 1.0 lagging.
0.001
For V 90 * VT Primary / VT Secondary & I 50% of CT Primary & Power factor 0.7 it is
±0.03
Temperature Range 0 C to +50 C (default - all units), -10 C to +60 C (by special order)
36
Technical Specification
Standards
Impulse:
Surge withstand:
Oscillatory
Fast transient
In accordance with:
RFI:
Meets IEC 255-4 (1976) & Amend #1 (1979) Meets IEC 255-5 (1977)
5 kV common-mode test
5 kV transverse-mode test
2.5 kV peak
4 kV crest voltage
ANSI C37.90.1 (1990), IEC 55-4 (1976) & Amend #1 (1979) Class III, IEC 255-22-2 (1988)
Class III
In accordance with EMI standard ANSI C37.90.2
Case and Cutout Details
(C:\WINDOWS\DESKTOP\MPR2000\MPR-2000-5-IM_FNL.DOC June 8, 2003)
37