GE SR489-P5-LO-A20-E | Solid-State Generator Protection Relay
Manufacturer: GE Fanuc
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Part Number: SR489-P5-LO-A20-E
Condition：New with Original Package
Product Type: Solid-State Generator Protection Relay
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
The GE Multilin SR489-P5-LO-A20-E is an advanced generator management relay designed to deliver comprehensive protection, control, and monitoring for industrial and utility generators. It supports operation across 25, 50, or 60 Hz and accommodates both synchronous and induction generators.
This relay features a 5 A CT secondary input and flexible LO control power (20–60 VDC or 48–62 VAC). Moreover, the enhanced 40-character LCD enables clear local diagnostics and configuration. The unit integrates 12 RTD inputs, 6 programmable relays, 4 VT inputs, and 4 isolated 4–20 mA analog I/Os, providing comprehensive interfacing for monitoring and control. Additionally, seven assignable digital inputs allow for customizable logic integration.
Communication is streamlined through dual RS485 and RS232 ports, supporting Modbus RTU and DNP 3.0 protocols for seamless SCADA integration. Advanced protection functions include percentage differential protection, stator and bearing RTD monitoring, loss-of-field, reverse power, and unbalanced load detection, ensuring reliability and early fault detection. For detailed fault analysis, the relay supports oscillographic recording and 256-event logging with up to 12 samples per cycle.
Rugged construction, compliance with UL, CE, CSA, and ANSI/IEEE standards, and panel-mounted installation make this relay suitable for harsh industrial environments.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | SR489-P5-LO-A20-E |
| Manufacturer | GE Multilin |
| Series | SR489 Generator Protection Relay |
| Product Type | Generator Management Relay |
| Current Input Rating | 5 A CT secondary |
| Control Power | 20–60 VDC or 48–62 VAC |
| Frequency Range | 0.00 to 90.00 Hz |
| Display | 40-character enhanced LCD |
| Analog I/O | 4 isolated 4–20 mA inputs/outputs |
| RTD Inputs | 12 channels |
| Relay Outputs | 6 programmable output relays |
| Digital Inputs | 7 assignable inputs |
| VT Inputs | 4 voltage transformer inputs |
| Communication Ports | 2 × RS485, 1 × RS232 |
| Protocols Supported | Modbus RTU, DNP 3.0 |
| Event Recording | 256-event log, oscillographic capture |
| Mounting Type | Panel-mounted |
| Operating Temperature | –20°C to +60°C |
| Certifications | UL, CE, CSA, ANSI/IEEE |
FAQ
Q1: What is the main purpose of the SR489-P5-LO-A20-E relay?
A1: It provides comprehensive protection, control, and monitoring for industrial generators.
Q2: Which communication protocols does it support?
A2: Modbus RTU and DNP 3.0 via dual RS485 and RS232 ports.
Q3: How many analog I/Os does the relay have?
A3: Four isolated 4–20 mA analog input/output channels.
Q4: Can it monitor generator temperature?
A4: Yes, it supports 12 RTD inputs for stator and bearing monitoring.
Q5: What type of event recording is available?
A5: The relay offers 256-event logging with oscillographic capture for detailed analysis.