Protection Relays: MPS-3000

SCP-C

The MPS 3000 is ideal for high voltage motors, large low voltage motors, and applications
where full protection and advanced warning is crucial. Monitoring three phase currents,
voltages and up to 10 temperature inputs.

Full Featured Motor Protection Relay

The MPS-3000 provides a comprehensive motor protection package. Monitoring three phase currents and voltage together with 10 RTD/Thermistor temperature inputs it provides an ideal solution for Medium and Large Low Voltage Motors.

The MPS-3000 provides comprehensive motor protection. Thermal capacity and overload calculations with bias input from current imbalance.

Advanced Protection

MPS-3000 Application
  • Max. Start Time (48)
  • Too Many Starts Level 1 (66)
  • Undercurrent Level 1 (37)
  • Undercurrent Level 2 (37) 
  • Load Increase - Alarm (51L)
  • Over Current Level 1 - Jam (51R)
  • Over Current Level 2 - Short (50)
  • Thermal Capacity Level 1 (49/51)
  • Thermal Capacity Level 1 (49/51)
  • Current Imbalance Level 1 (46)
  • Current Imbalance Level 2 (46) (Positive / Negative Sequence)
  • Under-voltage (27)
  • Over-voltage Level 1 (59)
  • Over-voltage Level 2 (59)
  • Phase loss (47)
  • Phase sequence (47)
  • Ground Fault Level during starting (50G)
  • Ground Fault Level 1 (50G)
  • Ground Fault Level 2 (50N)
  • Communication failure (3)
  • Internal failure (3)
  • External Fault 1 - interlock (86 or 94)
  • External Fault 2 - interlock (86 or 94)
  • External Fault 3 - interlock (86 or 94)
  • High Temp. Level 1, sensors 1-10 (49R)
  • High Temp. Level 2, sensors 1-10 (49R)
  • Under Power Level 1 (32L)
  • Under Power Level 2 (32R)
  • Low Power Factor (55)

Level 1 & 2 can be used for Alarm & Trip or both for trip with different time delays



  • Protection
  • Control
  • Construction
  • Available Versions
MPS3000 Application

Each protection can be designated as:

  • Alarm Fail-safe
  • Trip (or Trip Fail-safe)
  • Auto Reset
  • Panel Reset
  • Remote Reset

Inputs

  • Control supply 120-230V, AC/DC Optional 19-60VDC
  • 3 phase voltage, directly up to 690V, Above 690V through PT
  • Three phase currents C.T. Sec. 1 or 5A
  • Ground current C.T. Sec. 1 or 5A
  • 10 temperature sensors, with two types:
    • 10 RTD-Pt100 (or CU)
    • 6 RTD-Pt100 (or CU) and 4 Thermistors (Programmable as NTC or PTC)
  • 4 Programmable discrete inputs
  • 4 Programmable Analog Inputs 0/4-20mA. (0-1mA by special order).

Outputs

  • 4 Programmable Relays 8A, 250VAC.
  • Four Programmable Analog Outputs, 0/4-20mA (0-1mA by special order)

Display - LCD

  • Large LCD, 150mm x 30mm (6" x 1")
  • Measured values (True R.M.S. at a sampling rate of 0.5 msec.).
  • Three phase voltage phase to phase
  • Three phase voltage phase to neutral
  • Current each phase
  • Ground current
  • Temperature / Resistance each sensor
  • Energy with programmable pulse output
  • Power, Reactive power, Power factor
  • Minimum & Maximum RMS Average value (three phases) of Voltage, Current and Frequency

Calculated data

  • Motor current in % of FLC
  • Imbalanced current
  • Thermal capacity
  • Time to trip
  • Time to start (after fault)

Statistical data

  • Total run time
  • Total number of starts
  • Total number of trips
  • Last start time period
  • Last start current peak
  • Energy

Fault data

  • Last trip
  • Last alarm
  • Trip current each phase
  • Trip earth fault current
  • Trip voltage (each phase)
  • List of last 10 trips with time stamp (Date, Hour, Minutes).

Display - LEDs

  • On
  • Stopped
  • Starting
  • Running
  • Relay A
  • Relay B
  • Alarm
  • Trip
  • Internal Failure

Communication

  • RS 485, half duplex, MODBUS Protocol, baud rate 1200-19200 bits/sec. enables parameter change, supervision and remote resetting.
  • 20 user-selectable parameters grouping of Actual Data.
  • Other protocols (plug-in board) - consult factory.

Real Time Clock

  • Time stamp for each fault - Date, Hour and Minute.

Fault Simulation

  • Simulation of voltage, currents and temperature faults enables relay testing. This simulation Program allows testing and self learning of the MPS 3000.

Dimensions (mm) & Weight (kg)

  • Horizontal: W-310, H-135, D-160, 3.3Kg
  • Vertical: W-135, H-310, D-160, 3.3Kg

Available types

  • MPS-3000/P - Protection only system
  • MPR-3000/C - Protection & Control System

MPS-3000/C

Similar to the MPS-3000/P except with 16 discrete inputs to enable full control (start, stop, rotation direction change, etc.) The MPS-3000 also incorporates two additional protection functions:

  • Control Circuit Open (74)
  • Welded Contactor (74)