GE 889 - Page 28

1–18 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
AUXILIARY OVERVOLTAGE (59X)
Operating Parameter: ......................................Vx (Phasor)
Pickup Level: .........................................................0.00 to 3.00 x VT in steps of 0.01 x VT
Dropout Level:......................................................97 to 98% of Pickup
Level Accuracy: ...................................................±0.5% of reading from 10 to 240 V
Overvoltage Curves:.......................................... Definite Time, Inverse Time, FlexCurves A/B/C/D
Pickup Time Delay: ............................................0.000 to 6000.000 s in steps of 0.001s
Dropout Time Delay:.........................................0.000 to 6000.000 s in steps of 0.001s
Pickup Accuracy: ................................................‘Auxiliary voltage input channel error
Operate Time: ......................................................< 30 ms at 1.1 x pickup at 60Hz
Curve Timing Accuracy:..................................at >1.1 x PKP: 3.5% of operate time ± ½ cycle (whichever is
greater) from pickup to operate
Timer Accuracy:..................................................± 3% of operate time or ± ½ cycle (whichever is greater)
NEUTRAL OVERVOLTAGE (59N)
Operating Parameter: ......................................3V_0 calculated from phase to ground voltages
Pickup Level: .........................................................0.02 to 3.00 x VT in steps of 0.01 x VT
Dropout Level:......................................................97 to 98% of Pickup
Level Accuracy: ...................................................±0.5% of reading from 10 to 208 V
Neutral Overvoltage Curves:......................... Definite time, FlexCurve A,B,C,D
Pickup Time Delay: ............................................0.000 to 6000.000 s in steps of 0.001 s (Definite Time)
Dropout Time Delay:.........................................0.000 to 6000.000 s in steps of 0.001 s (Definite Time)
Operate Time: ......................................................< 25 ms at 1.1 x pickup at 60Hz
< 30 ms at 1.1 x pickup at 50Hz
Curve Timing Accuracy:.................................. at > 1.1 x Pickup: ± 3% of curve delay or ± 1 cycle (whichever
is greater) from pickup to operate
NEGATIVE SEQUENCE OVERVOLTAGE (59_2)
Operating Parameter: ......................................V_2
Pickup Level: .........................................................0.00 to 3.00 x VT in steps of 0.01 x VT
Dropout Level:......................................................97 to 98% of Pickup
Level Accuracy: ...................................................± 0.5% of reading from 10 to 208 V
Pickup Time Delay: ............................................0.000 to 6000.000 s in steps of 0.001 s
Dropout Time Delay:.........................................0.000 to 6000.000 s in steps of 0.001 s
Operate Time: ......................................................< 25 ms at 1.1 x pickup at 60 Hz
< 30 ms at 1.1 x pickup at 50 Hz
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
VOLTS PER HERTZ (24)
Voltages: ................................................................. Phasor only
Pickup Level: .........................................................0.80 to 4.00 in steps of 0.01 pu
Dropout Level:......................................................97 to 98% of pickup
Level Accuracy: ................................................... ±0.02 pu
Timing Curves:.....................................................Definite Time; IEC Inverse A/B/C; FlexCurves A, B, C, and D
TD Multiplier: .........................................................0.05 to 600.00 s in steps of 0.01
Reset Delay: ..........................................................0.00 to 6000.000 s in steps of 0.01
Timer Accuracy:..................................................±3% of operate time or ±15 cycles (whichever is greater) for
values greater than 1.1 x pickup
Number of Elements: ........................................2
Number of Elements: ........................................1