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Series: MP8000

Littelfuse MP8000 Relays Provide Exceptional Motor Protection
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The MP8000 series motor protection relay is designed to protect three-phase or single-phase motors with operating voltages of 90-690 V ac (use of external potential transformers can extend upper voltage range above 690 V ac). The MP8000 protects any motor drawing 0.5-1,000 full load amperes (external CTs are required above 100 A). The MP8000 series provides locked rotor, overload, overtemperature, and unbalance protection. Voltage-based protection elements are standard. These relays include inverse time-over current elements suitable for overload protection, and they also provide monitoring functions. The protection is unsurpassed by combining overload, voltage, phase loss and reversal, voltage and current imbalance, power monitoring, and underload in one package.
  • Bluetooth capability
  • Ethernet communications port
  • 3 selectable restart options
  • 4 programmable delay timers
  • Programmable auxiliary relay output
  • Flexible reset
  • Network communications capability
  • Access through iPhone or Android smartphone
  • Remote monitoring
  • Choose from automatic, semi-automatic, or manual to best meet individual application needs
  • Program separate delay times for power up, rapid cycle protection, motor cool down, and underload restarting
  • From C output can be programmed to ground fault, trip indication, or network control
  • Reset can be done through pushbutton on panel, remotely via the network
  • Compatible with Ethernet Modbus TCP/IP and Ethernet/IP

MP8000 Parts

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MP8000 Applications

Highlights Section

  • Conveyor systems
  • HVAC equipment
  • Saws and grinders
  • Fan motors
  • Almost any pumping application

Series: MP8000 Resources

MP8000 Support

Frequently Asked Questions

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What can I protect with the MP8000?

The MP8000 has a wide voltage and current range and operates on 50/60 Hz to protect nearly any motor or pump. It can also be used to retrofit older current-only based electronic overloads.

Do I need external current transformers for the current measurement?

For less than 100 A, conductors can be passed through the built-in current transformers on the MP8000. For applications above 100 A, external current transformers are required.

Can the MP8000 be used without the voltage protection functions?

Yes, the MP8000 can be put into current-only mode which will disable voltage-based protection functions. However, Littelfuse strongly recommends utilizing the voltage-based protection functions for superior protection especially prior to motor startup. The current-only mode is intended for retrofit applications on voltages above 690 V ac.