The GE Multilin 239 is a digital motor protection relay designed for low-voltage (LV) and medium-voltage (MV) motors, providing comprehensive protection, control, and monitoring in industrial and commercial power systems.
1. Key Functions
Motor Protection:
Thermal Overload Protection (I²t modeling to prevent overheating)
Short-Circuit & Locked Rotor Protection (instantaneous & time-delayed)
Phase Unbalance & Negative Sequence Protection (prevent damage from voltage asymmetry)
Ground Fault Protection (sensitive detection for equipment safety)
Undercurrent (Loss of Load) & Overcurrent Protection
Control & Automation:
Motor Start/Stop Control (direct-on-line, star-delta, soft starter compatibility)
Programmable Logic (FlexLogic™) for custom control schemes
Auto-Restart & Sequential Restart Blocking
Monitoring & Diagnostics:
Real-Time Measurements (current, voltage, power, energy, power factor)
Event Logging & Fault Records (last 10+ trips with oscillographic data)
Communication & SCADA Integration (Modbus RTU, optional Ethernet)
2. Key Features
Compact & DIN-Rail Mountable: Space-saving for panel installations.
Wide Voltage Range: Supports 24–240V AC/DC control power.
LED Indicators & LCD Display: Quick status visibility.
Industry-Standard Protocols: Modbus RTU (RS485) for easy integration.
3. Typical Applications
Pumps, Fans, Compressors, Conveyors (industrial motor protection)
HVAC Systems & Water Treatment Plants
Mining, Oil & Gas, Manufacturing Facilities
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