31-8 9440300990
Specifications DECS-250
Pickup Level
Open and Shorted Diode ................. 0 to 100% of Metered Field Current
Increment ......................................... 0.1%
Delay
Open Diode Protection ..................... 10 to 60 s
Shorted Diode Protection ................. 5 to 30 s
Increment ......................................... 0.1 s
Synchronism Check (25) Protection
Voltage Difference
Range ............................................... 1 to 50%
Increment ......................................... 1%
Slip Angle
Range ............................................... 1 to 99°
Increment ......................................... 0.1°
Slip Frequency
Range ............................................... 0.01 to 0.5 Hz
Increment ......................................... 0.01 Hz
Startup
Soft Start Level
Range ............................................... 0 to 90% of Rated Gen Voltage
Increment ......................................... 1%
Soft Start Time
Range ............................................... 1 to 7,200 s
Increment ......................................... 1 s
Field Flash Dropout Level
Range ............................................... 0 to 100% of Rated Gen Voltage
Increment ......................................... 1%
Maximum Field Flash Time
Range ............................................... 1 to 50 s
Increment ......................................... 1 s
Voltage Matching
Accuracy........................................... Generator rms voltage is matched with the bus rms voltage to within
±0.5% of the generator voltage.
Power System Stabilizer (Style xPxxxxx)
Model ................................................ IEEE Std 421.5 type PSS2A/2B/2C
Operating Mode ............................... Generator or Motor, ABC or ACB phase sequence
Sensing Configuration ...................... Power and Speed or Speed only
Power Measurement ........................ Two Wattmeter method or Three Wattmeter method
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