MPS Series - Motor Protection System Series - Littelfuse MPS Relays Provide Exceptional Motor Protection

Series: MPS Series - Motor Protection System
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The MPS series Motor Protection System offers comprehensive voltage protection and starter control for medium voltage motors. The system monitors voltage, current, and temperature to provide a comprehensive package of 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 high-horsepower induction motors.

Operation
The Control Unit (MPS-CTU) is the core module. It can operate as a standalone unit or with the Operator Interface (MPS-OPI), RTD Modules (MPS-RTD), and Differential Module (MPS-DIF). The CTU can be programmed using the OPI or the communications network. Programmable inputs and outputs provide a flexible hardware platform and custom software can be easily loaded from a PC to the CTU’s flash memory.

Operator Interface (MPS-OPI)

  • Large, bright, 4 x 20 vacuum-fluorescent display
  • Display metered values
  • Access set points
  • Powered by Control Unit
  • Panel mount or attach directly to Control Unit
  • Remote mounting (1.2 km or 4000 ft maximum loop length)
  • 1/2 DIN size
  • Hazardous-location certified

    • 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

    • Features

    • Overload
    • Current unbalance/Phase loss/Phase reverse
    • Overcurrent/Jam
    • Undercurrent
    • Ground fault
    • RTD temperature
    • Overvoltage
    • Undervoltage
    • Voltage balance
    • Phase differential
    • Dynamic thermal mode
    • Reduced overcurrent mode
    • Starter control

    Product Literature

    For Technical Questions

    Call +1 800-832-3873 or email us at relays@littelfuse.com 

    Access specifications, certifications, check availability and order parts below

    Catalog #Supply
    Voltage
    VAC    		Supply
    Voltage
    VDC    		Relay Contacts ConfigAnalog Output Current mACommunicationsIEEE Device NumbersRelay
    Contact
    Operating    		DimensionsWeight (lbs/g)Analog InputsConformally coatedDigital InputsFrequencyGF Trip Level Range pctGF Trip Time sCompare
    MPS-CTU-01-0065 - 26580 - 2753 Form A (N.O.); 2 Form C (N.O./N.C.)4 - 20RS/TIA-4851 - 2 - 3 - 4 - 5 - 9 - 14 - 18 - 19 - 27 - 24 - 34 - 37 - 38 - 46 - 47 - 48 - 49 - 50 - 50G - 50N - 51 - 51G - 51N - 55 - 59 - 66 - 74 - 81 - 86 - 87 - 94Fail-safe / Non Fail-safe0 KgOne 4-20 mAStandard850; 60; ASD5 - 100% of CT-Primary Rating0.0 - 100.0
    MPS-CTU-02-0065 - 26580 - 2753 Form A (N.O.); 2 Form C (N.O./N.C.)4 - 20RS/TIA-485 - DeviceNet1 - 2 - 3 - 4 - 5 - 9 - 14 - 18 - 19 - 27 - 24 - 34 - 37 - 38 - 46 - 47 - 48 - 49 - 50 - 50G - 50N - 51 - 51G - 51N - 55 - 59 - 66 - 74 - 81 - 86 - 87 - 94Fail-safe / Non Fail-safe0 KgOne 4-20 mAStandard850; 60; ASD5 - 100% of CT-Primary Rating0.0 - 100.0
    MPS-CTU-04-0065 - 26580 - 2753 Form A (N.O.); 2 Form C (N.O./N.C.)4 - 20RS/TIA-485 - Ethernet1 - 2 - 3 - 4 - 5 - 9 - 14 - 18 - 19 - 27 - 24 - 34 - 37 - 38 - 46 - 47 - 48 - 49 - 50 - 50G - 50N - 51 - 51G - 51N - 55 - 59 - 66 - 74 - 81 - 86 - 87 - 94Fail-safe / Non Fail-safe0 KgOne 4-20 mAStandard850; 60; ASD5 - 100% of CT-Primary Rating0.0 - 100.0
    MPS-OPI-01-003.9 H x 7.6 W x 2.2 D in.0 KgStandard
    MPS-CTU-03-00
    Obsolete: 2020 -09-16    		65 - 26580 - 2753 Form A (N.O.); 2 Form C (N.O./N.C.)4 - 20RS/TIA-485 - Profibus1 - 2 - 3 - 4 - 5 - 9 - 14 - 18 - 19 - 27 - 24 - 34 - 37 - 38 - 46 - 47 - 48 - 49 - 50 - 50G - 50N - 51 - 51G - 51N - 55 - 59 - 66 - 74 - 81 - 86 - 87 - 94Fail-safe / Non Fail-safe0 KgOne 4-20 mAStandard850; 60; ASD5 - 100% of CT-Primary Rating0.0 - 100.0
    MPS-DIF-01-00
    Obsolete: 2020 -09-16    		0 KgStandard


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