GE SR469 469-P5-HI-A20-E|Motor Management Relay

Technical Specifications

• Product Model: GE SR469 469-P5-HI-A20-E
• Brand: GE Multilin (GE Grid Solutions)
• Warranty: One Year
• Input Voltage: 70–265 VAC or 90–300 VDC control power
• Operating Temperature: -20°C to +60°C
• Storage Temperature: -40°C to +80°C
• Response Time: Output relay operation ≤10 ms
• Protection Class: IP20 (panel-mounted relay)
• Accuracy Class: High-precision metering and protection accuracy
• Output Frequency: 48–62 Hz system frequency compatibility
• Rated Current Range: 5 A phase CT secondary input
• Communication Interface: RS-232 and RS-485 serial interfaces
• Supported Protocols: Modbus RTU, EnerVista 469 configuration interface
• Overload Capacity: Advanced thermal modeling for motor overload protection
• Dimensions: Approx. 192 mm × 192 mm panel cutout; depth ~200 mm
• Analog Outputs: 4 × 4–20 mA isolated outputs

Product Overview

The GE SR469 469-P5-HI-A20-E is a motor management relay designed to provide comprehensive protection, monitoring, and control for medium- and large-sized industrial motors. Developed by GE Multilin, this relay belongs to the widely deployed 469 Motor Management Relay series used in motor control centers and industrial power distribution systems.

Industrial motors powering pumps, compressors, conveyors, and fans operate under demanding electrical and mechanical conditions. The relay continuously monitors electrical parameters such as current, voltage, frequency, and thermal capacity to detect abnormal operating conditions. When faults such as overload, phase imbalance, or overheating are detected, the relay can initiate alarms or trip commands to protect the motor and connected equipment.

The relay also integrates advanced metering and communication capabilities. Through RS-232 or RS-485 interfaces and Modbus communication, operators can access real-time diagnostic data, event logs, and system measurements using configuration software. This combination of protection and monitoring functions allows engineers to improve motor reliability, extend equipment lifespan, and implement predictive maintenance strategies in industrial facilities.

Key Functions

Comprehensive Motor Protection

The relay provides multiple protection mechanisms including overload protection, phase imbalance detection, ground fault monitoring, and undervoltage/overvoltage protection. These functions prevent severe motor damage and reduce the risk of unplanned shutdowns.

Advanced Thermal Modeling

Integrated thermal algorithms monitor the motor’s heating condition using current measurements and RTD temperature inputs. This dynamic model helps predict overheating and ensures motors operate within safe thermal limits.

Integrated Metering and Diagnostics

The relay measures parameters such as voltage, current, demand, and frequency. Operators can view this data locally through the enhanced LCD interface or remotely through configuration software for detailed system analysis.

Industrial Communication and Data Integration

Communication ports support RS-232 and RS-485 connections, enabling integration with SCADA systems, PLCs, and monitoring software. Engineers can remotely configure settings, retrieve event logs, and monitor motor performance in real time.

Application Scenarios

Motor Control Centers (MCC)

In large manufacturing plants, the relay protects critical motors driving conveyors, mixers, and production equipment. Its monitoring capabilities help operators detect early warning signs of motor stress.

Pumping and Water Treatment Systems

Pumping stations rely on continuous motor operation. The relay monitors electrical load and thermal conditions to prevent motor overheating and mechanical failure.

Oil and Gas Compressor Stations

Compressors used in pipelines and refineries operate under heavy loads. The relay provides protection against electrical faults and ensures stable motor operation in demanding environments.

Power Generation Auxiliary Systems

In power plants, motors drive fans, cooling pumps, and fuel handling systems. The relay ensures reliable motor protection and provides operational data for maintenance planning.