GE 369-HI-R-M-F-E-H-E is a Motor Management Relay from the GE Multilin product family. It is a digital protection device specifically designed to protect and manage medium-size AC motors and their drive equipment, offering a wide range of advanced protection, monitoring, and diagnostic functions.

Key Features and Functions

Comprehensive Motor Protection

• Overcurrent and Undervoltage Protection: Monitors motor overload currents and voltage drops to prevent damage caused by power system abnormalities.
• Ground Fault and Phase Reversal Protection: Detects ground faults and incorrect phase sequence, helping avoid severe failures due to wiring errors or insulation breakdown.
• Thermal Overload and Stall Protection: Thermal-model-based protection prevents overheating caused by excessive temperature rise or failure to start.
• Locked Rotor Protection: Prevents excessive current during startup when the motor rotor is mechanically jammed.

Advanced Monitoring and Diagnostics

• Multiple RTD Inputs: Supports up to 12 optional RTD inputs for monitoring stator, bearing, or ambient temperatures, enabling accurate motor condition assessment.
• Metering and Event Recording: An optional metering module provides monitoring of power factor, voltage, current, power, and energy (kWh), while recording critical events for post-fault analysis.

Communication and System Integration

• Modbus RTU via RS485 / RS232: Supports standard serial communication protocols for easy integration into DCS, SCADA, or PLC systems, enabling remote monitoring and configuration.
• Embedded Ethernet (Optional): Selected versions support Ethernet communication to meet higher-speed data transmission requirements.

Technical Specifications

• Rated Voltage Range: 50–300 VDC / 40–265 VAC
• Input Types: Up to 12 RTD inputs (for temperature monitoring)
• Metering Package: Optional (supports energy metering)
• Communication Interfaces: RS485 (Modbus RTU), RS232, optional fiber-optic port
• Operating Temperature Range: −40°C to +70°C
• Standards Compliance: IEC 60255-12, ANSI/IEEE C37.95, and related standards

Typical Applications

This relay is widely used in industrial automation and is particularly suitable for the following environments:

• Oil & Petrochemical Industry: Protects critical drive motors and helps prevent production interruptions caused by motor failures.
• Power and Generation: Provides precise protection for generator sets and large motors.
• Manufacturing: Used for protection and operational optimization of CNC machines, compressors, pumps, and similar equipment.