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| MPR 6/3 |
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| Products > Motor Protection Relays > MPR 6/3 |
| MPR 6/3 |
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| Digital Motor Protection Relay new generation of microprocessor based relay designed to protectthree phase induction motors. Featuring Directional Ground Fault and
true RMS line currents are measured at a sampling rate of 0.5 mSec. The MPR-6 includes three temperature (RTD's or Thermistors) inputs, all combined to provide a
comprehensive protection package.
The MPR-6 incorporates two main functions:
a. Advanced, state of the art motor protection.
b. Real time supervision and communication. |
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Advantages at glance
Directional Ground Fault - New for 2003.
Comprehensive package, 26 protective functions
Ability to select each protective functions as Alarm, Trip, both or none.
True RMS at a scan time of 0.5 mSec
Full control and supervision through RS 485 with open Modbus protocol.
Compact, simple to install and easy to operate.
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Protection
Too many starts
Maximum start time
Under current
Load increase 
Thermal level (Overload)
Over-current Jam
Over-current Stall
Over-current Short circuit
Unbalanced current
Ground fault current
Over-temp. -RTD or PTC/NTC Thermistor
External faults 1&2 - N.O / N.C contacts
Current fluctuation (Broken Bar Detection)
Analog Output
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Configurable Operation
Any fault can be designated as an Alarm, Trip, both or none. Furthermore, two auxiliary
relays can be specified to operate with any of the faults.
"Time To Trip" and "Time To Start"
When current exceeds the overload setting, a unique built-in algorithm calculates the time
until the motor will be tripped (when thermal capacity is 100%), enabling the operator or host
computer to take corrective action before tripping. After the MPR-6 has tripped the motor, it
will calculate the time delay until the motor can be restarted, after cooling down.
Informative Data
An illuminated LCD provides clear status and statistical information.
Actual Data
Phase currents
Ground fault current
Thermistor resistance
Motor load in % of FLC
Thermal capacity
Time to trip
Time to start
Unbalanced current
Statistical Data
Motor run time
Total number of starts
Total number of trips
Last start time
Last start peak current
Last trip
Last alarm
Phase currents
Ground fault current
All at trip time
Communication
RS485 serial link with MODBUS RTU communication protocol, operating at baud rate of
1200 to 9600 bits/sec, enables monitoring of set points and actual parameters.
Up to 32 MPR-6 relays can be connected to the host computer on the same twisted shielded pair.
Typical applications
Small to medium size low and medium voltage motors.
Motors in the Process Industry
Critical motors requiring special protection or supervision.
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