DECS-200 General Information 1-7
Accuracy
FCR Mode: ±1.0% of the nominal value for 10% of the bridge input voltage change or
20% of the field resistance change. Otherwise, ±5.0%.
Var Mode: ±2.0% of the nominal VA rating at the rated frequency
Power Factor Mode: ±0.02 PF of the PF setpoint for the real power between 10 and 100% at
the rated frequency.
Internal Tracking: 0.5%
Parallel Compensation
Modes: Reactive Droop and Reactive Differential (cross-current) ∗
Burden: ∗ Can exceed 1 VA if external resistors are added to the CT circuit for
crosscurrent compensation.
Adjustment Range
Reactive Droop: 0 to 30%
Reactive Differential: –30 to 0%
Field Overvoltage Protection
Pickup
Range: 1.0 to 325 Vdc
Increment: 1.0 Vdc
Time Delay
Range: 0.2 to 30 s
Increment: 0.1 s
Field Overcurrent Protection
Pickup
Range: 0 to 16 Adc
Increment: 0.1 Adc
Time Delay
Characteristic: Inverse per ANSI C50.13
Exciter Diode Monitor (EDM) Protection
Pole Ratio
Range: 1 to 10 (0 if unknown)
Increment: 0.01
Ripple Threshold
Open and Shorted Diode: 0 to 100%
Time Delay
Open Diode Protection: 10 to 60 s
Shorted Diode Protection: 5 to 30 s
Open and Shorted Diode Inhibit Levels
Range: 0 to 100% or <1 Adc field current
<45 Hz and >70 Hz generator frequency
Generator Undervoltage Protection
Pickup
Range: 0 to 30 kVac
Increment: 1.0 Vac
Time Delay
Range: 0.5 to 60 s
Increment: 0.1 s
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