GE 469-P5-HI-A20-E protection relay

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GE 469-P5-HI-A20-E

GE 469-P5-HI-A20-E is a high-performance Motor Management Relay (MMR) from the GE Multilin series by General Electric (GE). It is primarily used for the protection and monitoring of industrial motors and generators.

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1. Key Technical Specifications

Model Breakdown: 469-P5-HI-A20-E

• 469: Indicates the product series

• P5: Refers to a multifunction protection relay

• HI: Designed for high electromagnetic interference (High Interference) environments

• A20: Equipped with 20 normally open contacts and supports analog outputs (such as 4–20 mA)

• E: Includes an Ethernet communication interface

Power Supply Input:

• 90–300 VDC or 70–265 VAC

Communication Interfaces:

• Modbus RTU (RS-232 / RS-485)

• Optional Ethernet

Ingress Protection Rating:

• IP65 (dustproof and waterproof); some versions feature a conformal coating for corrosive environments

Operating Temperature:

• −20°C to +55°C (some sources specify −40°C to +60°C)

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2. Main Protection and Monitoring Functions

This relay is specifically designed for motors and generators and provides comprehensive protection features:

Motor Protection:

• Overload Protection: Detects excessive motor current that may cause overheating

• Undervoltage / Overvoltage Protection: Protects against abnormal supply voltage conditions

• Phase Loss Protection: Trips when any phase is lost

• Ground Fault Protection: Activates when ground leakage current is detected

• Single-Phasing Protection: Prevents motor damage caused by single-phase operation

Generator Protection:

• Differential Protection: Used for internal fault detection in transformers and generators

• Directional Protection: Detects the direction of fault current to prevent false tripping

• Underfrequency Protection: Monitors abnormal grid frequency conditions

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3. Auxiliary Functions and Features

• Analog Outputs: Supports 4–20 mA outputs for easy integration with DCS systems

• Fault Diagnostics and Recording: Includes fault log recording and pre-fault data (FFI) for post-event analysis

• Mounting Options: Supports DIN rail or panel mounting; some versions are wall-mounted

• Environmental Adaptability: Designed for harsh environments (storage temperature −40°C to +85°C); selected models feature anti-corrosion coatings

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4. Typical Applications

• Industrial Motor Systems: HVAC systems, pumps, fans, conveyor motors, and similar applications

• Generator Sets: Provides comprehensive digital protection for generators