GE Multilin 369‑C100 Motor Management Digital Protection Relay

The GE Multilin 369‑C100 is a digital motor management relay designed for low‑voltage and medium‑voltage three‑phase motors. It provides complete motor thermal protection, electrical measurement, RTD temperature monitoring and fault event recording to avoid motor damage caused by overload, phase unbalance and ground faults.

This panel‑mounted relay has a local LCD display and keypad, and supports Modbus RTU communication for remote monitoring and parameter configuration via EnerVista software. Original production has been discontinued. It serves as aftermarket spare parts for water treatment, mining and chemical plant motor control cabinet maintenance and technical upgrading.

Main Specifications

1. Brand: GE Multilin; Model:369‑C100; Type:Digital Motor Management Protection Relay
2. Applicable Equipment:Three‑phase induction motors, fans, pumps, compressors and conveyor drives
3. Protection Functions:Overload, phase unbalance, ground fault, stall, undercurrent and RTD over‑temperature protection
4. Communication Interface:RS485 serial port, built‑in Modbus RTU industrial communication protocol
5. Human‑Machine Interface:Onboard LCD and keypad for local reading, setting and fault checking
6. Installation:Panel cut‑out mounting, wide auxiliary power voltage, industrial protection enclosure
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Use thermal overload simulation curve to monitor motor heating status and prevent winding burnout.
2. Detect three‑phase current imbalance and ground fault, and output alarm or trip signal in time.
3. Receive RTD sensor signals to continuously monitor the temperature of motor bearings and stator windings.
4. Measure voltage, current, power, power factor and energy consumption for equipment performance analysis.
5. Save fault records and waveform data, helping maintenance personnel analyze shutdown causes quickly.
6. Transmit real‑time operating data to DCS or SCADA system through Modbus bus for centralized management.

Application Scenarios

1. Motor protection and online condition monitoring in power, chemical, water supply and mining industries.
2. Spare relay replacement and daily maintenance of existing GE 369 series motor control panels.
3. Technical renovation and safety optimization of aging motor protection and automatic control systems.
4. On‑site troubleshooting and replacement of faulty motor protection relays on running production facilities.
5. Spare‑parts stocking for system integrators and electrical automation maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete GE Multilin motor protection devices.

FAQ

1. Q:What is the difference between 369‑C100 and 369‑A200?
   A:369‑C100 only has rear RS485 interface, while 369‑A200 adds front RS232 debugging port.
2. Q:Can 369‑C100 realize remote monitoring?
   A:Yes, it communicates with upper monitoring system via RS485 Modbus RTU bus.

3. Q:Is this motor protection relay still in original production?
   A:GE Multilin has stopped producing this model, only tested surplus and refurbished spare units are available.