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Legacy Motor Protection

Home > Grid Automation > Protection Relays > Legacy Motor Protection > MM3 Intelligent MCC Controller

MM3 Intelligent MCC Controller
MM3 Intelligent MCC Controller

The Motor Manager 3 (MM3) combines control functions and comprehensive motor protection in one package. This compact device provides sophisticated control and protective relaying at significant cost savings over the discrete devices normally found in a low voltage motor control center (MCC).


  • Low voltage motor control centers

Protection and Control

  • Overload
  • Phase unbalance
  • Contactor failure
  • Locked/stalled rotor
  • Ground fault
  • Hot winding thermistor
  • Undervoltage auto restart
  • Outputs: 2 contactor, 2 programmable
  • Inputs: 6 fixed, 10 programmable
  • 1 analog input

Monitoring and Metering

  • Display phase current, ground current, thermal capacity, analog input, power, energy, etc.
  • Trip record and pre-trip values
  • Maintenance information

User Interface

  • 1 RS485 ModBus® Ports, 1200 - 57,600 bps
  • Display model for local interface