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SR489-P5-LO-A20-E is a generator management relay produced by GE Multilin, belonging to the Multilin 489 series. Here are its detailed specifications:
- Phase CT secondary: 5A
- LO control power: 20-60VDC; 48-62VAC at 20-48Hz
- Analog output: 4-20mA
- Operable at 25Hz, 50Hz, or 60Hz
- Frequency parameter range: 0.00-90.00Hz
- Neutral voltage parameter range: 0-25000V
- Power factor parameter range: 0.01-1.00 (leading/lagging)
- Reactive power parameter range: -2.00 to 2.00 times the rated voltage
- The rear panel includes 12 RTD inputs, 6 output relays, 2 RS485 communication ports, and 4 VT inputs.
- Communication ports support Modbus RTU or DNP 3.0 protocols (or both) with a maximum speed of 19200bps.
- Additionally, the rear panel is equipped with 4 isolated 4-20mA analog inputs/outputs and 7 assignable digital inputs.
- Features a 40-character display that allows users to view value messages, diagnostics, and setpoints.
- The front panel includes multiple status LEDs, input buttons, a numeric keypad, input ports, and an LCD screen for reading device position information.
- Compact structure with dimensions of 21.6 cm (length) × 22.4 cm (width) × 25.2 cm (height), facilitating easy installation and maintenance.
- Shipping weight is approximately 10 kg.
In addition, this relay is equipped with multiple protection functions such as stator ground protection and stator thermal protection. It can measure parameters like current, voltage, and power, and provide monitoring for temperature, vibration, and speed.
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