MPR-6 Motor
Protection Relay

Key Benefits

Digital, fully featured Motor Protection Relay with Temperature Sensor Inputs for protecting critical motors in plants. Monitoring three-phase currents, ground current, and motor temperature (RTD/Thermistor), the MPR-6 accurately creates a "Thermal Modelling" of the motor to protect it from abnormal conditions in the power supply, motor, and cabling faults, as well as operator malfunctions.

Advantages

  • Advanced microprocessor-based circuitry
  • True RMS measurement at a sampling rate of 0.5 mSec
  • Display of motor's operating data, fault, and statistical data
  • Early warning "Time to Trip" indication
  • Programmable inputs and output
  • RS 485 communication for remote programming
  • Monitoring and supervision
  • Compact design and simple installation

Standard Features

  • Power supply: 230VAC (175 - 250V) or115VAC (88 - 125V), 45-65Hz.
  • Extensive programmable protection functions, with separate settings for Alarm and Trip levels (*) as well as adjustable Time delays.
    • Maximum start time (Stall)
    • Too many starts
    • Under current (*)
    • Load increase
    • Over-current (Jam)
    • Over-current (Short circuit) (*)
    • Thermal capacity level (*)
    • Current unbalance (*)
    • Ground fault current (*)
    • Current Instability (Broken Bar Detection)
    • Over temperature - RTD or PTC / NTC Thermistor (*)
    • Disconnected temperature sensor
    • External fault 1- N.O / N.C contacts
    • External fault 2 - N.O / N.C contacts
  • Extensive LCD display functions
    • Current in each phase
    • Motor load in % of FLC
    • Ground fault current
    • Unbalanced current
    • RTD Temperature / Thermistor
    • Resistance
    • Thermal Capacity
    • Time to trip
    • Time to start
    • Actual data
    • Total run time
    • Total number of starts
    • Total number of trips
    • Last start time
    • Last start peak current
    • Last trip description
    • Last alarm description
    • Phase currents at time of trip
    • Ground fault current at time of trip
  • Communication
    • RS485 serial link with MODBUS protocol
  • Programmable analogue output

Applications

  • MPR-6 protects:
  • Medium-size, low-voltage motors
  • Small-size, medium-voltage motors
  • Motors in the process industry
  • Critical motors requiring special protection or supervision
For more information download the PDF brochure

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