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Phone: +86 16626708626Description
The GE SR469-P5-HI-A20 is widely employed in industrial automation systems focused on motor protection and management, particularly for medium and large-sized electrical motors in manufacturing plants, power generation facilities, and process industries. This relay safeguards critical motor equipment by monitoring electrical parameters and mechanical conditions to prevent damage from overloads, phase imbalances, short circuits, or mechanical failures like jammed rotors. It is especially essential in environments with complex motor-driven machinery where minimizing downtime and maintenance costs is paramount. Applicable in industrial automation and control systems, the GE SR469-P5-HI-A20 enhances motor reliability, operational safety, and energy efficiency by delivering sophisticated protective functions tailored to motor management challenges.
Product Introduction and Positioning
The GE SR469-P5-HI-A20 is a microprocessor-based motor management relay from GE’s Multilin series, designed for advanced protection, control, and monitoring of medium and large electrical motors. It integrates multiple protective functions within a single unit, including thermal modeling, phase differential protection, overload and underload supervision, and fault diagnostics. Positioned within the industrial motor control architecture, the relay serves to prevent motor damage and optimize operational performance by providing real-time data and control capabilities.
This versatile relay supports modular system configurations compatible with industrial control panels and automation systems. The GE SR469-P5-HI-A20’s advanced feature set allows engineers and integrators to customize protection curves and control logic, making it adaptable to a wide array of motor types and operational demands. Its communication interfaces also allow integration into supervisory control and data acquisition (SCADA) systems for centralized monitoring and control.
- SR469-P5-HI-A20
Key Technical Features and Functional Benefits
The GE SR469-P5-HI-A20 offers comprehensive protection with adaptive thermal overload modeling that incorporates RTD feedback and exponential cooling to accurately represent motor temperatures under diverse conditions. It provides phase and ground fault detection, adjustable overload curves including custom profiles, and sophisticated event recording for fault analysis. The relay is equipped with multiple analog inputs for vibration, pressure, and other sensor signals, enabling multi-dimensional motor condition monitoring.
Designed to operate reliably in harsh industrial settings, the hardware supports a wide control power range (70-265 VAC and 90-300 VDC) and includes conformal coating options to resist humidity and contaminants. Four configurable 4-20 mA analog outputs allow remote instrumentation and control interfacing. The relay also features multiple communication ports (RS232, RS485) supporting Modbus RTU protocol for easy system integration and remote telemetry. Its sturdy design and versatile capabilities make it a dependable solution for ensuring motor longevity and reducing unplanned outages.
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Model | GE SR469-P5-HI-A20 |
| Brand | General Electric (GE) |
| Product Type | Motor Management Relay |
| Voltage Inputs | 90-300 V DC / 70-265 VAC |
| Phase CT Secondary | 5 Amps |
| Overload Curves | 15 standard + custom, two-speed motor support |
| Analog Inputs | 4 configurable 4-20 mA inputs |
| Digital Inputs | 4 assignable inputs |
| Output Relays | 6 Form-C relays |
| Operating Temperature Range | -40°C to +70°C |
| Dimensions | Approx. 21.7 cm x 23 cm x 25 cm |
| Weight | Approx. 7.3 kg |
| Communication Ports | RS232 front, RS485 rear |
| Protocols | Modbus RTU |
| Certifications | CE Marked |
| Environmental Protection | Optional conformal coating |
Related Modules or Compatible Units
SR469-P5-HI-A10 – Variant with alternate analog output options for varied instrumentation integration.
SR469-P5-HI-A20-E – Enhanced version with extended environmental protection and display features.
GE Multilin 849 – Motor protection relay with added automation functions for critical motor systems.
GE Multilin 945 – Relay designed for generator protection complementing motor management relays.
GE Multilin 470 – Feeder protection relay often deployed alongside motor relays in industrial networks.
Installation Notes and Maintenance Best Practices
When installing the GE SR469-P5-HI-A20, ensure the control cabinet space accommodates the relay’s size and provides good ventilation to maintain operating temperature limits. Wiring and grounding methods should comply with GE guidelines to reduce electromagnetic interference and enhance signal integrity. Verify compatibility of current transformers and voltage inputs to guarantee accurate measurements and protection accuracy.
Maintenance involves routine inspection of relay connections and cleaning to prevent dust accumulation that could impair heat dissipation. Regular functional testing using the relay’s built-in diagnostic tools is recommended to verify protective settings and communications. Firmware updates and calibration should be conducted by qualified technicians to maintain optimal performance and system integration readiness. Proper maintenance maximizes the relay’s operational longevity and reliability.
