Full featured motor protection relay

The MPS 3000 provides comprehensive motor protection.
Thermal capacity and overload calculations with bias input from current imbalance (positive/negative sequence) and temperature sensors ensure accurate modeling of your motor's condition.

Advanced Protection

• 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 functions

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)

Emergency Start (key operated function)

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)