Technical Specifications
- Product Model: MM300-GEHD2CAB (GE Multilin MM300 Motor Management Relay)
- Brand: GE Multilin (GE Vernova)
- Warranty: One Year
- Control Supply: 60–300 VAC / 80–250 VDC universal control voltage
- Operating Temperature: -20°C ~ +60°C
- Storage Temperature: -40°C ~ +90°C
- Response Time: Fault detection typical ≤40ms; programmable trip delay
- Protection Class: Base unit IP20; graphical control panel IP54
- Accuracy Class: ±2% current measurement, ±1% voltage metering
- Rated CT Input: 1A / 5A secondary current transformer input
- Communication Interface: RJ45 Ethernet, RS485 terminal port, front USB configuration port
- Supported Protocols: Modbus TCP, Modbus RTU, DeviceNet
- Overload Capacity: Built-in transient surge protection, CT saturation detection, continuous hardware self-monitoring
- Dimensions: Base unit 120 mm × 90 mm × 113 mm; Graphical control panel 153 mm × 102 mm × 35 mm; MCC bucket mounting design
Product Overview
The GE MM300-GEHD2CAB is an all-in-one digital motor management system designed for comprehensive protection, metering, control and automation of low voltage three-phase AC motors. This Multilin MM300 unit integrates multiple discrete protective devices into a compact MCC-mount module, resolving equipment damage risks caused by overload, phase loss, stall, unbalance and voltage abnormalities. Electrical engineers, MCC designers and maintenance teams utilising GE power protection equipment rely on this relay to maximise motor service life and minimise unplanned production downtime. Equipped with FlexLogic programmable logic, waveform capture and event recording, it delivers rich diagnostic data and seamless connection to PLC, SCADA and DCS platforms across process and heavy industrial facilities. (Word count: 173)
Key Functions
- Full Suite of Motor Protection Algorithms: Embedded thermal overload model, locked rotor protection, phase unbalance, phase loss, undercurrent, over/undervoltage, reverse phase and earth fault protection. User-configurable trip/alarm curves adapt to IEC and NEMA standard motors.
- High-Accuracy Multi-Parameter Metering: Continuously measures three-phase current, voltage, active/reactive power, power factor, operating frequency and accumulated energy consumption for energy audit and equipment performance analysis.
- Advanced Diagnostics & Data Recording: Stores up to 256 timestamped events, motor startup records and oscillography waveform data. Historical fault records greatly accelerate post-trip troubleshooting and root-cause analysis.
- Flexible Automation & Industrial Communication: FlexLogic enables custom interlock logic without separate PLC modules. Dual communication channels support parallel connection to multiple supervisory systems; front USB port allows local parameter setup via EnerVista software.
Application Scenarios
- Oil & Gas Refinery Pump & Compressor MCC Cabinets: The GE MM300 protects critical rotating equipment against process upset conditions, supporting continuous hydrocarbon production and plant safety compliance.
- Water & Wastewater Treatment Facilities: Deployed on intake pumps, aeration blowers and sludge conveyors. Reliable motor supervision prevents pump dry-run damage and pipeline operation failures.
- Mining & Heavy Industry Conveyor & Hoist Systems: Guards against mechanical jamming, stall and unbalanced loading on high-power drive motors operating under harsh site conditions.
- Legacy MCC Retrofit & Spare Replacement: Drop-in compatible upgrade for older MM2/MM3 motor protection relays. Standardised MCC mounting form factor reduces cabinet modification during scheduled maintenance shutdowns.
