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GE SR489-P5-H1-A20 – Multilin 489 Generator Management Protection Relay
Product Overview
The GE SR489-P5-H1-A20 is a microprocessor-based generator management relay from GE Multilin 489 series. It integrates comprehensive protection, monitoring, metering and control functions for synchronous and induction generators. This device addresses safety risks and abnormal operation issues in power plants and industrial power systems, implementing multi-type fault protection and real-time parameter monitoring. It supports flexible configuration and remote communication, ensuring stable, safe and efficient operation of generator units in power, petrochemical and heavy manufacturing industries.
Technical Specifications — SR489-P5-H1-A20
| Parameter | Value |
|---|---|
| Product Model | SR489-P5-H1-A20 |
| Manufacturer | GE Multilin |
| Product Type | Generator Management Protection Relay |
| Power | 70–265 VAC / 90–300 VDC, 48–62 Hz, power consumption ≤10VA |
| Communication / Protocol | RS485 Modbus RTU, Ethernet, DNP3.0, IEC 61850 |
| Operating Temperature | -20 °C to +70 °C |
| Mounting | Flush Panel Mount |
| Dimensions (HxWxD) | 300 mm x 250 mm x 200 mm |
| Weight | 7.7 kg |
| Typical Interfaces | 5A CT current inputs, 4 configurable digital inputs, 6 relay outputs, 4–20mA analog outputs, RTD temperature inputs |
| Compliance | CE, UL508, IEC 60255, ANSI C37.90 |
GE SR489-P5-H1-A20
Key Features and Benefits — SR489-P5-H1-A20
- Integrates full generator protection functions: stator differential, 100% stator ground fault, loss of excitation, reverse power, overcurrent and overexcitation protection.
- Supports up to 12 RTD temperature monitoring inputs, accurately detecting stator and bearing temperature abnormalities.
- High measurement accuracy (±0.2 level for current/voltage) with fast fault response speed ≤10ms for instantaneous protection.
- Built-in event recording, fault oscillography and self-diagnosis functions, facilitating quick troubleshooting and maintenance.
- Multi-protocol communication enables seamless integration with SCADA and power monitoring systems.
Related Models
- SR489-P5-H1-A20-E: Enhanced version with expanded communication and storage functions for large generator units.
- SR489-P6-H1-A20: High-capacity variant with upgraded protection logic and higher sampling precision.
- SR489-L5-H1-A20: Low-power lightweight model for small industrial generator protection.
- 489-M2: Matching display and operation panel for local configuration and status viewing.
Installation and Maintenance — SR489-P5-H1-A20
- Install the relay via flush panel mounting, correctly wire CT inputs, power supply, digital I/O and communication ports before power-on.
- Configure protection settings according to generator rated parameters; avoid mismatched CT ratio settings to prevent protection misoperation.
- Routine maintenance includes checking terminal tightness, cleaning dust, verifying communication status and reading fault records.
- Regularly calibrate measurement parameters and update firmware following official GE guidelines to maintain protection accuracy.
