GE 489 – P5 – H1 – A20 is a generator management relay manufactured by GE Multilin and belongs to the 489 generator management series. The following are some of its parameters:
- Electrical Parameters:
- Control Power: The HI control power is 90 – 300 VDC and 70 – 265 VAC, and the frequency range is 48 – 62 Hz.
- Analog Output: 4 – 20 mA.
- Phase Current: 5A phase CT secondary.
- Measurement Parameter Ranges:
- Output Currents of IA, IB, IC and Average Output Current: 0.00 – 20.00 x FLA (FLA refers to the rated full load current of the generator).
- Negative Sequence Current: 0 – 2000% FLA.
- Average Generator Load: 0.00 – 20.00 x FLA.
- Stator RTD, Bearing RTD, Ambient RTD and RTD 1 – 12: The temperature range is from – 58 to + 482 °F.
- AB, BC, CA Voltages: 0.00 – 1.50×rated voltage.
- Volts/Hertz: 0.00 – 2.00 x rated voltage.
- Other Parameters:
- Accuracy of Analog Current Input: ±1% of full scale.
- Fuse Model: 215 – 02.5.
- Degree of Protection: IP40 for the front panel and IP10 for the rear panel.
- Maximum Altitude: 2000 meters.
- Overvoltage Category: Category II.
- Isolation of RTD Input: 36 Vpk (isolated from analog inputs and outputs).
- Sinusoidal Vibration Test Grade: Grade 1.
- Shape of Underfrequency Curve: Grade 1 alarm, Grade 2 trip with time delay, definite time limit.
- Configuration of Voltage Phase Sequence: ACB or ABC phase sequence.
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