GE SR469-P5-HI-A20-E Motor Protection Relay

Description

Product Model: GE SR469-P5-HI-A20-E

• Product Brand: General Electric (GE)
• Product Series: Multilin SR 469 Motor Protection Relay
• Key Features:
  • Comprehensive motor protection, control, and monitoring
  • Advanced fault detection (thermal, overcurrent, ground fault, phase unbalance)
  • High-speed trip response for critical industrial motors
  • User-friendly operator interface with programmable settings
  • Designed for heavy-duty industrial applications in energy, oil & gas, mining, and manufacturing

Introduction

In modern industrial environments, electric motors are mission-critical assets. Any failure in these systems can lead to costly downtime, safety hazards, or even catastrophic damage to equipment. To prevent such risks, advanced protection systems are essential. The GE SR469-P5-HI-A20-E, part of the trusted GE Multilin SR 469 series, is a motor protection relay designed to deliver reliable, intelligent, and comprehensive motor management.

This relay is engineered to protect medium and large horsepower motors in industries such as oil and gas, petrochemicals, pulp and paper, mining, and power generation. With advanced diagnostics, real-time monitoring, and high-speed trip capability, the GE SR469-P5-HI-A20-E ensures your motors operate safely and efficiently under demanding conditions.

Applications & Industry Context

Motors are the heart of industrial operations. Whether it’s driving pumps, compressors, fans, or conveyor systems, motors need both operational efficiency and protection against electrical and mechanical stress.

The GE SR469-P5-HI-A20-E is widely used in industries where uptime is non-negotiable:

• Oil & Gas: Critical for compressors, pumps, and drilling equipment where downtime can halt production and cause significant financial losses.
• Power Generation: Protects cooling fans, feedwater pumps, and auxiliary motors essential to turbine and generator reliability.
• Mining & Metals: Manages large motors used in crushers, mills, and hoists where high torque demands require dependable control.
• Chemical & Process Industries: Ensures continuous operation of agitators, mixers, and process pumps.
• Water & Wastewater Treatment: Safeguards pumps, blowers, and treatment systems where uninterrupted service is critical.

By combining protection, control, and communication, the SR469-P5-HI-A20-E does more than safeguard motors — it optimizes plant performance and reduces total cost of ownership.

Key Features & Benefits

The GE SR469-P5-HI-A20-E delivers a wide range of protective and monitoring functions:

1. Comprehensive Motor Protection
   • Overcurrent, thermal overload, ground fault, phase unbalance, and stall protection.
   • Helps extend motor life and prevents costly unplanned outages.
2. High-Speed Trip Response (HI Option)
   • Designed for motors where fast tripping is critical to protect against severe electrical faults.
   • Minimizes damage to windings and associated equipment.
3. Flexible Control Functions
   • Provides motor start/stop sequencing and control logic.
   • Programmable features support different motor starting methods (DOL, soft start, VFD).
4. Advanced Monitoring
   • Real-time data on motor performance: current, voltage, power factor, and thermal capacity.
   • Enables predictive maintenance strategies and operational insights.
5. User Interface & Programming
   • Large, easy-to-read display for operators.
   • Configurable via front panel or remote communication software.
6. Communication Capabilities
   • Integrates seamlessly with plant automation systems via Modbus, RS485, and optional Ethernet protocols.
   • Allows centralized monitoring and remote diagnostics.
7. Event Recording & Diagnostics
   • Stores trip logs, sequence of events, and fault waveforms.
   • Speeds up troubleshooting and helps identify root causes.
8. Rugged Design for Harsh Environments
   • Built to withstand electrical noise, high vibration, and wide temperature ranges.
   • Suitable for the most demanding industrial sites.

Technical Specifications

Installation & Maintenance

The GE SR469-P5-HI-A20-E is designed for ease of integration into existing motor control centers (MCCs) and switchgear. Its panel-mounted form factor and flexible wiring options make installation straightforward.

Installation Tips:

• Ensure correct CT and PT wiring for accurate current/voltage sensing.
• Follow grounding best practices to minimize electrical noise interference.
• Configure settings according to motor size, type, and operational parameters.

Maintenance Practices:

• Use event logs and diagnostics for predictive maintenance.
• Periodically verify calibration and protective settings.
• Inspect wiring connections to prevent loosening due to vibration.
• Regularly download relay data to analyze motor performance trends.

By leveraging the diagnostic and monitoring tools built into the SR469-P5-HI-A20-E, maintenance teams can shift from reactive to predictive maintenance strategies, improving uptime and asset health.

Related Models

• GE SR469-P5-HI-A20-E-H – Variant with additional communication and hardware features.
• GE SR469-P1-HI-A20-E – Alternate model with a different power supply rating.
• GE SR469 Standard Versions – Suitable for applications where high-speed tripping is not required.
• GE Multilin 489 – Protection relay for smaller motor applications.
• GE Multilin 369 – Advanced motor management relay for medium motors.