Technical Specifications of the General Electric Multilin MM300 Motor Manager

The GE Multilin MM300 Motor Manager is a comprehensive motor protection and control system designed for low-voltage three-phase AC motors, offering advanced automation, diagnostics, and communication capabilities. Below are its key technical parameters and features:

1. Protection Functions

• Thermal Modeling:
  • Dynamic thermal capacity calculation for motors during startup, running, and cooling phases.
  • Supports 15 customizable overload curves with hot/cold motor compensation and auto-reset features.
• Electrical Fault Protection:
  • Overcurrent, undercurrent, phase unbalance, ground fault (sensitive and standard), overvoltage/undervoltage, and phase reversal.
  • Acceleration time monitoring and locked rotor protection.
• Mechanical Jam/Stalled Rotor Detection:
  • Prevents mechanical damage by detecting blockages in pumps, fans, or conveyors.
• Voltage Monitoring:
  • Auxiliary undervoltage, VT fuse failure, and phase loss detection.
• Temperature Monitoring:
  • RTD (100 Ω Platinum) and thermistor inputs for motor winding and bearing temperature tracking.

2. Automation & Control Features

• FlexLogic™ Programmable Logic:
  • Customizable control sequences (e.g., starter control, process interlocks) via ladder logic or graphical programming.
  • Reduces dependency on external PLCs.
• Starter Control:
  • Supports reversing, reduced-voltage starting, and multi-speed applications.
• Auto-Restart Functionality:
  • Configurable undervoltage auto-restart with adjustable delay times.
• Digital Inputs/Outputs (I/O):
  • 20 I/O ports (16 digital inputs, 4 relay outputs) with opto-isolated inputs for wet contacts.
  • Programmable for interlocking or external system integration.

3. Metering & Monitoring

• Real-Time Measurements:
  • Current, voltage, power, energy, frequency, and power factor.
• Oscillography:
  • Analog waveform capture at 32 samples/cycle for fault analysis.
• Event Recorder:
  • Stores up to 256 time-tagged events with 1 ms resolution for post-incident diagnostics.
• Device Health Diagnostics:
  • Self-monitoring of internal components (e.g., relay wear, communication status).

4. Communication Protocols

• Networking:
  • RS485 (Modbus RTU), Ethernet (Modbus TCP/IP, NTP), Profibus (internally powered), and DeviceNet (ODVA-compliant).
• Programming Ports:
  • USB and RS485 for local configuration.
• Remote Display Options:
  • Color HMI with graphical display, motor status LEDs, and USB programming port.

5. Mechanical & Environmental Specifications

• Form Factor:
  • Compact design (base unit: 120 mm W × 90 mm H × 113 mm D) for MCC bucket integration.
• Weight:
  • 0.75 kg (base unit).
• Power Supply:
  • AC: 120–240 V (50/60 Hz) or 60–300 V (50/60 Hz).
  • DC: 125–250 V or 24–48 V.
  • Power consumption: 16 W typical, 25 W maximum.
• Operating Temperature:
  • -25°C to +70°C (standard), with extended options available.
• Protection Class:
  • IP54 enclosure (standard) for dust and water resistance.

6. Output Relays

• Form-A (NO) and Form-C (NO/NC) Relays:
  • Silver-alloy contacts rated for 10 A (resistive), 2 A (inductive), and 30 A per ANSI C37.90.
  • Mechanical life: 10 million operations.

7. Certifications & Compliance

• Standards:
  • EN60255-5, EN61010-1, EN50263, EN61000-6-2, EN61000-6-4, UL508, UL1053, C22.2 No. 14.
• Software:
  • EnerVista™ Suite for configuration, logic design, and firmware updates.

8. Applications

• Industrial Processes:
  • Conveyor systems, pumps, fans, and compressors.
• Infrastructure:
  • Water/wastewater treatment, HVAC, and power generation.
• Oil & Gas:
  • Well recovery pumps and pipeline motors.
• Transportation:
  • Railway traction and tunnel ventilation.

The MM300 Motor Manager combines robust protection, flexible automation, and advanced diagnostics to enhance motor reliability and reduce downtime in critical applications. Its modular design and compliance with global standards make it suitable for both IEC and NEMA-rated motors.

For detailed configuration or integration support, refer to GE’s EnerVista™ software documentation or contact authorized GE Multilin distributors.