Product Overview
The GE 469-P5-HI-A20-E-H (also referenced as SR469-P5-HI-A20-E-H) is a high-performance motor management relay from the GE Multilin 469 series, designed specifically for comprehensive protection, monitoring, and control of medium-to-large industrial motors . This microprocessor-based relay serves as the primary protection device for critical motor assets operating in the 3–15 kV voltage class — the kinds of motors that drive compressors in refineries, refrigerant pumps in LNG plants, hoist motors in mining operations, and auxiliary motors in power generation facilities . A single failure on these machines can translate into millions in lost production, so the protection must be fast and accurate.
The suffix breakdown of the GE 469-P5-HI-A20-E-H tells you exactly what you are getting: -P5 indicates 5A phase CT secondary inputs (the standard for most industrial installations); -HI means support for high-impedance grounded systems, which dramatically improves single-phase ground fault detection sensitivity down to the 100 mA range — a level that conventional relays simply cannot see ; -A20 specifies 20 programmable I/O points (12 digital inputs + 8 digital outputs) for local interlocking, status feedback, and remote start/stop control without adding extra hardware; -E designates the enhanced front panel with a large LCD display and onboard RS232 programming port; and -H indicates a conformal coating that protects the board against corrosive environments — think chemical plants with H₂S, offshore platforms with salt spray, or humid tropical installations .
The GE 469-P5-HI-A20-E-H integrates multiple protection functions into a single device, including thermal overload modeling (with RTD inputs), phase imbalance and phase loss, ground fault, locked rotor, under/over voltage, and frequency protection . It is a “predict before it breaks” device — the relay continuously models the motor’s thermal capacity and alerts operators before damage occurs.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 469-P5-HI-A20-E-H / SR469-P5-HI-A20-E-H |
| Manufacturer | GE Multilin (General Electric Grid Solutions) |
| Product Type | Motor Management Relay (Motor Protection Relay) |
| Series | GE Multilin 469 Series |
| Phase CT Secondary | 5A (standard 5A current transformer input) |
| Control Power (AC) | 70 – 265 VAC, 48 – 62 Hz |
| Control Power (DC) | 90 – 300 VDC |
| Analog Outputs | 4 channels, 4 – 20 mA (configurable) |
| I/O Configuration (A20) | 20 programmable I/O (12 DI + 8 DO) |
| Communication Ports | 1x RS485 (Modbus RTU/DNP3.0) + 1x Ethernet (Modbus TCP / IEC 61850) |
| RS232 Programming Port | Front panel, 9600 baud (programmable to 19,200 baud) |
| Grounding Support (HI) | High-impedance grounded system; enhanced single-phase ground fault sensitivity |
| Conformal Coating (-H) | Corrosion-resistant coating for chemical/harsh environments |
| Display | 40-character backlit LCD with keypad navigation |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Event Recorder | 1024 time-stamped events + 32 fault oscillography records |
| RTD Inputs | Up to 12 RTD inputs for winding/ bearing temperature monitoring |
| Dimensions | 200 mm × 150 mm (approximate) |
| Weight | Approx. 1.36 kg (3 lbs) |
| Mounting | Panel-mount (standard) or DIN-rail (with accessory) |
