Littelfuse MPS-CTU-02-00, MPS Series, Motor Protection System, 65-265VAC/80-275DC, RS-485 & DeviceNet
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The MPS Motor Protection System monitors voltage, current, and temperature to provide a comprehensive package of 22 protective functions. The MPS is a modular system with integrated protection, motor control, metering, and data-logging functions. This system is typically used to provide protection for three-phase low- and medium-voltage, medium- to highhorsepower induction motors.
Control Unit (MPS-CTU)
• Current inputs—5-A or 1-A secondary phase current transformers
• Voltage inputs—up to 600 V without PTs
• Earth-leakage input—5-A or 1-A secondary or sensitive transformer
• Tachometer (high-speed pulse) input
• 8 digital inputs, 5 relay outputs, 1 analog input and output
• 24-Vdc supply for OPI and RTD modules, and for digital inputs
• IRIG-B time-code input
• 1/2 DIN size, surface mount
• RS-485 network communications (Standard)
• DeviceNet™, Profibus®, or Ethernet communications available
Specifications
| Functional Characteristics | |
| Protective Functions (IEEE Device Numbers) | Overload (49, 51), Phase reverse (current) (46), Overfrequency (81), Overcurrent (50, 51), Jam, Underfrequency (81), Ground fault (50G/N, 51G/N), Undercurrent (37), Unbalance (voltage) (47), Failure to accelerate, RTD temperature (38, 49), Unbalance (current) (46), Underspeed (14), Starts per hour (66), Phase loss (voltage) (47), Overvoltage (59), Differential (87), Phase loss (current) (46), Undervoltage (27), Phase reverse (voltage) (47), Power factor (55) |
| Input Voltage | 65-265 Vac, 25 VA; 80-275 Vdc, 25 W |
| Power-Up Time | 800 ms at 120 Vac |
| Ride-Through Time | 100 ms minimum |
| 24-Vdc Source | 100 mA maximum |
| AC Measurements | True RMS and DFT, Peak, 16 samples/cycle, and positive and negative sequence of fundamental |
| Frequency | 50, 60 Hz or ASD |
| Inputs | Phase current, Earth-leakage current, Phase voltage, 7 digital, tachometer, 1 analog |
| Output Contacts | 5 contacts — See Product Manual |
| Communications | Allen-Bradley® DFI and Modbus® RTU (Standard); DeviceNet™, Ethernet (Optional) |
| Conformally Coated | Standard feature |
| Warranty | 10 years |
| Control Unit Mounting | Surface |
| Operator Interface Mounting | Panel, Control-Unit mounted |
| Certification & Compliance | |
| CSA |
CSA Certified (CSA C22.2 No. 14) |
| RCM | RCM |
| UL |
UL Recognized (UL 60947-4-1, UL 1053) |