GE SR469‑P5‑HI‑A20

Product Summary

The GE SR469‑P5‑HI‑A20 is a member of the Multilin 469 Motor Management Relay family, originally developed by General Electric (often listed under GE Multilin / GE FANUC / GE Grid Solutions). It’s a motor protection and control relay designed for comprehensive protection, monitoring, and management of medium‑voltage motors and related systems. This particular variant is often referred to with an old style enclosure (“老款外壳”) indicating the earlier generation housing design before newer revisions like the SR469‑P5‑HI‑A20‑E series appeared.

---

Core Function and Protection Capabilities

The SR469‑P5‑HI‑A20 relay combines advanced motor protection functions with integrated control and monitoring tools, including:

• Thermal overload protection with motor thermal modeling

• Phase unbalance and phase loss detection

• Overcurrent protection and hot/cold stall detection

• Ground fault monitoring (with ground CT inputs)

• RTD temperature biasing and stator/bearing temperature monitoring
  These functions help protect motors from damage due to overloading, phase issues, and thermal stress.

---

Technical Specification

Feature	Description
Product Model	SR469‑P5‑HI‑A20
Product Type	Motor Management & Protection Relay
Series	469 Motor Management Relay
Supply Voltage	AC: 70‑265 V @ 48‑62 Hz; DC: 90‑300 V
Phase Current Inputs	5 A CT secondary (P5 option)
Analog Outputs	4 × 4‑20 mA (A20 option)
Communication	RS‑485 Modbus RTU (typical)
Mounting	Panel or draw‑out Mounting
Operating Temp Range	−20°C to +60°C (typical)
Housing	Old style enclosure

Key Features

• Comprehensive motor management combining protection, metering, and control

• Modular architecture with draw‑out construction for easier replacement and maintenance

• 4‑20 mA analog outputs for integration with external monitoring systems

• Universal power supply range compatible with diverse industrial power systems

• Integrated communications (typically RS‑485 Modbus) for system integration

• RTD support and thermal modeling for enhanced motor protection accuracy
  These capabilities make it suitable for critical industrial motor applications where uptime and protection are essential.

---

Typical Applications

The SR469‑P5‑HI‑A20 is used in applications such as:

• Medium‑voltage motor maintenance and protection in manufacturing plants

• Motor Control Centers (MCCs) and automation systems

• Pumps, compressors, fans, and conveyors with heavy load profiles

• Retrofit projects replacing older motor protection relays
  Its reliability and comprehensive protection suite make it a preferred choice for motor protection in industrial power systems.

---

Installation & Maintenance

Installation Tips

• Mount the relay in a panel or MCC enclosure using the correct cut‑out and hardware.

• Connect CTs, RTDs, and analog outputs according to the wiring diagram supplied by GE.

• Ensure proper grounding and shielding for reliable communications.

Maintenance Advice

• Periodically inspect CT and RTD wiring for continuity and correct polarity.

• Review historical event logs for early detection of abnormal conditions.

• Clean dust and debris from ventilation slots while power is off to improve cooling.

Proper installation and preventive maintenance maximize relay longevity and system protection reliability.

---

Benefits of Using SR469‑P5‑HI‑A20

• Proven protection logic for motor fault conditions

• Flexible integration with existing control systems

• Industry‑recognized GE Multilin design architecture

• Analog outputs and communication ports for advanced monitoring
  Suitable for both new systems and retrofit scenarios where trusted motor protection solutions are required.