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GE SR489-P1-HI-A20-E Generator Management Relay
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- Part Number: SR489-P1-HI-A20-E
- Brand: General Electric
- Type: Generator Management Relay
- Dimensions: 22.8x15.1x3.5cm
- Country of Origin: USA
- Barcode: 8537101190
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Product Description
The GE Multilin SR489-P1-HI-A20-E, operating as a core element of the Multilin 489 series, is a specialized digital microprocessor-based hardware component designed for the comprehensive protection, automated control, and algorithmic monitoring of small to medium-sized synchronous or induction generator systems within industrial power plants and utility networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model Number | SR489-P1-HI-A20-E |
| Brand | GE Multilin / General Electric |
| Origin | Canada |
| Weight | 8.50 lbs (3.85 kg) nominal |
| Form Factor | Standard 3U high-density rack or drawout panel-mount chassis geometry |
| HI Power Supply Range | 90–300 VDC or 70–265 VAC @ 48–62 Hz industrial lines |
| Operating Temperature | Industrial baseline: -20 to +60 deg C (-4 to +140 deg F); Extended survival limits: -40 to +60 deg C |
| Humidity Compliance | 5% to 95% relative humidity (non-condensing margins) |
| Analog Interface Array | Dedicated analog input channels configured for localized vibration monitoring |
| Control Loop Telemetry | 4–20 mA isolated DC analog outputs for remote SCADA mirroring |
| Integrated Time-Current Curves | ANSI, IEC, IAC, Definite Time, and user-programmable Flexcurve configurations |
| Dielectric Isolation Strength | Production tested at 1.9 kV AC for 1 second or 1.6 kV AC for 1 minute (per UL 508 parameters) |
| High-Frequency Surge Immunity | Damped Oscillation Test Level rated at 2.5 kV, 1.0 MHz bounds |
Industrial Control and Networks
- Backplane Bus Communication Velocity: The relay processor simultaneously captures multi-phase current, voltage, and auxiliary sensor wave metrics across its high-speed parallel internal bus. Protection algorithms run continuously within deterministic clock windows, ensuring that tripping equations drop the output contacts within milliseconds of detecting a critical generator fault state.
- I/O Density Scaling: The SR489 architecture merges generator stator protection, field winding tracking, vibration sensor inputs, tachometer pulses, and trip coil monitoring into a single hardware footprint. This layout removes the need for separate standalone transducers, reducing panel space requirements and physical terminal strip wiring.
- Firmware Flash Compatibility: Core protective curve parameters, alternator configuration variables, and Modbus network registers are maintained in non-volatile flash memory sectors. The onboard module firmware version must match the active EnerVista engineering software setup build to ensure error-free settings transfers and baseline synchronization.
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