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GE SR489-P5-LO-A20-E – Multilin Low-Voltage Generator Management Relay
Product Overview
The GE SR489-P5-LO-A20-E is a Multilin low-voltage generator management relay designed for comprehensive protection, monitoring, and control of synchronous and induction generators in industrial power systems. This advanced relay addresses the critical need for reliable generator protection in sectors like power generation, oil and gas, manufacturing, and marine applications, preventing equipment damage and production downtime from electrical faults. It integrates over 30 protection functions, including stator/rotor protection, power/frequency monitoring, and ground fault detection, while offering advanced communication capabilities for seamless integration with SCADA and control systems. With its 1ms processing resolution and modular design, this relay delivers precise, real-time protection and diagnostics for generators up to 600V.
Technical Specifications — SR489-P5-LO-A20-E
| Parameter | Value |
|---|---|
| Product Model | SR489-P5-LO-A20-E |
| Manufacturer | General Electric (GE Multilin) |
| Product Type | Low-Voltage Generator Management Relay |
| Power | Control Voltage: 20-60 VDC / 48-62 VAC; Rated Voltage: Up to 600V |
| Communication / Protocol | Modbus RTU, Modbus TCP/IP, DNP 3.0 Level 2, Ethernet (10Mbps) |
| Operating Temperature | -40°C to +70°C (-40°F to 158°F) |
| Mounting | Panel Mount (19-inch rack compatible), Flange Mount |
| Dimensions (HxWxD) | 140mm x 140mm x 220mm |
| Weight | 1.8kg (3.97lbs) |
| Typical Interfaces | 4 isolated 4-20mA analog I/O, 7 assignable digital inputs, 6 output relays, 4 RTD inputs, 4 VT inputs |
| Compliance | IEC 61850, IEEE C37.90, ANSI/IEEE C37.112, CE, UL Listed, RoHS |
GE SR489-P5-LO-A20-E
Key Features and Benefits — SR489-P5-LO-A20-E
- Comprehensive Protection Suite: Integrates 30+ protection functions including 100% stator grounding, negative sequence overcurrent, reverse power, and thermal overload protection.
- High-Speed Processing: 1ms resolution ensures rapid fault detection and clearing, minimizing equipment damage.
- Advanced Diagnostics: Embedded fault recorder with 128MB non-volatile memory captures pre/post-fault data for root cause analysis.
- Flexible Communication: Multiple protocol support enables seamless integration with existing SCADA and control systems.
- User-Friendly Interface: 40-character display with front-panel buttons and LEDs for local configuration and status monitoring.
Related Models
- SR489-P1-HI-A20-E: High-voltage version (up to 15kV) with enhanced protection features for large-scale generators.
- SR489-P5-LO-A10-E: Basic version with reduced protection functions for cost-sensitive applications.
- SR489-P5-LO-A30-E: Advanced version with additional arc flash protection and event analysis capabilities.
- SR489-P5-MD-A20-E: Medium-voltage (up to 5kV) variant optimized for industrial power distribution systems.
Installation and Maintenance — SR489-P5-LO-A20-E
- Mount the relay securely on a panel or flange, ensuring proper ventilation and clearance for wiring connections.
- Connect voltage transformers (VTs) and current transformers (CTs) following polarity guidelines to ensure accurate measurement and protection.
- Configure protection settings, communication parameters, and I/O mappings using the front-panel interface or GE Multilin software.
- Verify relay operation with primary injection testing to confirm proper fault detection and tripping characteristics.
- Perform periodic firmware updates and calibration checks to maintain optimal performance and compliance with industry standards.
