Description
The GE Multilin 469 is a comprehensive motor management relay designed to provide superior protection, monitoring, and diagnostics for medium-to-large-sized motors. The 469-P1-HI-A20-E model is a high-performance variant equipped with specific input and output configurations tailored for industrial power systems.
Technical Specifications
| Feature | Specification |
| Product Series | GE Multilin 469 Motor Management Relay |
| Phase CT Secondaries | 1 A |
| Control Power Supply | 90–300 VDC or 70–265 VAC (48–62 Hz) |
| Analog Outputs | 4–20 mA |
| Front Panel | Enhanced Display |
| Analog Output Response | ≤ 100 ms |
| Communication Protocol | Modbus RTU / Half Duplex |
| Operating Altitude | Up to 2000 m |
| Ambient Storage Temp | -40°C to +80°C |
Product Overview
The GE Multilin 469 is engineered to protect, control, and manage three-phase induction motors. By utilizing advanced thermal modeling, the relay prevents motor damage caused by overheating, stalls, or phase imbalances.
Key Features:
-
Advanced Protection: Includes comprehensive protection elements such as thermal overload, short circuit, phase reversal, and undercurrent protection.
-
Enhanced Monitoring: The “E” designation indicates an enhanced front panel interface, providing operators with clear, real-time data visibility and simplified navigation for settings and diagnostics.
-
Reliable Communication: Built-in Modbus RTU support allows for seamless integration into existing SCADA or DCS architectures for remote monitoring and control.
-
Industrial Robustness: Designed for harsh environments, these units often feature draw-out construction for ease of maintenance and replacement without disconnecting external wiring.
469-P1-HI-A20-E
Core Functional Characteristics
▫ Complete motor protection suite: thermal overload, locked rotor, start stall, phase unbalance, ground fault, reverse phase, over/under voltage, over/under frequency
▫ Multi-channel RTD interface for winding and bearing temperature monitoring, supports Pt100, Ni120 sensors
▫ High-accuracy electrical metering: phase current, voltage, power, power factor, frequency and load trend recording
▫ 9 opto-isolated digital inputs, 6 Form-C relay outputs for trip, alarm and interlock control
▫ 4 configurable analog outputs (4–20mA / 0–1mA) to transmit operating parameters to DCS and local instruments
▫ Dual communication resources: RS485 Modbus RTU + Ethernet, supports Modbus TCP, DNP3.0
▫ Built-in event logging and fault oscillography for post-fault analysis
▫ Front panel LCD and status LED indicators for on-site parameter checking and troubleshooting
▫ Optional PCB conformal coating, strong adaptability to dusty, humid industrial cabinet environments
Typical Application Fields
Thermal Power Plants
Protection for boiler fans, circulating water pumps, ash conveying motors and auxiliary drive units.
Petrochemical & Refining Facilities
Critical motor protection for compressors, process pumps and mixing equipment on production units.
Water Treatment & Sewage Works
Motor monitoring and safety interlock for large water pump groups.
Metallurgy & Mining Industry
Protection for conveyors, fans and heavy-duty process motors.
Power Distribution & Industrial Substations
Motor control center (MCC) intelligent protection upgrade and spare replacement projects.
