GE Multilin 369‑C101 Motor Management Digital Protection Relay

The GE Multilin 369‑C101 is a digital motor management relay for low‑voltage and medium‑voltage three‑phase induction motors. It provides thermal overload protection, current unbalance and ground fault protection, RTD temperature monitoring and power metering to prevent unexpected motor damage and shutdown.

This panel‑mounted relay features local LCD and keypad, and supports RS485 Modbus RTU communication for remote monitoring and parameter setup with EnerVista software. Original production has been discontinued. It is widely used as aftermarket spare parts for water treatment, mining and chemical motor control cabinet overhaul and upgrade.

Main Specifications

1. Brand: GE Multilin; Model:369‑C101; Type:Digital Motor Management Protection Relay
2. Applicable Equipment:Three‑phase motors, pumps, fans, compressors and conveyor drive units
3. Protection Functions:Overload, phase unbalance, ground fault, stall, undercurrent and multi‑channel RTD overtemperature protection
4. Communication Interface:Rear RS485 port, Modbus RTU industrial communication protocol
5. Human‑Machine Interface:Built‑in LCD display and keypad for local reading and configuration
6. Installation:Panel cut‑out mounting, wide auxiliary power range, industrial robust enclosure
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Adopt thermal model monitoring to track motor heat accumulation and avoid winding over‑heating burnout.
2. Continuously detect three‑phase current imbalance and ground leakage current and trigger alarm or trip output.
3. Receive multi‑point RTD signals to monitor real‑time temperature of stator windings and bearings.
4. Measure voltage, current, active power, power factor and energy consumption for equipment performance analysis.
5. Record fault events and waveform snapshots for maintenance personnel to quickly locate failure causes.
6. Upload operating data and alarm information to DCS/SCADA through Modbus bus for centralized monitoring.

Application Scenarios

1. Motor protection and condition monitoring for power, petrochemical, water supply and mining industries.
2. Spare relay replacement and routine maintenance of existing GE 369 series motor control panels.
3. Technical renovation and safety improvement of aging motor protection and control systems.
4. On‑site troubleshooting and replacement of faulty relays on continuously running production equipment.
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 hardware.

FAQ

1. Q:What is the difference between 369‑C101 and 369‑C100?
   A:369‑C101 has more RTD input channels and optimized logic settings compared with 369‑C100.
2. Q:Does 369‑C101 support local parameter modification?
   A:Yes, users can set protection parameters directly via the front LCD and keypad.

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