GE 889 - Page 31

CHAPTER 1: INTRODUCTION SPECIFICATIONS
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–21
BREAKER CONTROL
Operation:...............................................................Asserted FlexLogic Operands
Function: .................................................................Opens/closes, blocks, bypasses blocks to the feeder breaker
BREAKER FAILURE
Mode:........................................................................3-pole
Current Supervision:..........................................phase and neutral current (fundamental phasor magnitude)
Current Supervision Pickup:...........................0.050 to 30.000 x CT in steps of 0.001 x CT
Current Supervision Dropout: .......................97 to 98% of pickup
Current Supervision Accuracy:.....................For 0.1 to 2.0 x CT: ± 0.5% of reading or ± 0.4% of rated
(whichever is greater),
For > 2.0 x CT: ± 1.5% of reading
Time Delay:............................................................0.000 to 6000.000 s in steps of 0.001 s
Timer Accuracy: ..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
Reset Time: ............................................................< 10 ms typical at 2 x Pickup at 60 Hz
< 12 ms typical at 2 x Pickup at 50 Hz
LOCAL CONTROL MODE
Number of Elements: ........................................1
Select Before Operate Mode: ........................Disabled, Enabled
Mode:........................................................................Local Mode ON, Local Mode OFF
Display Status:......................................................LM (local mode) displayed in banner
Tagging:...................................................................Disabled, Enabled
FIELD BREAKER DISCREPANCY
Configurable: ........................................................Assigned to any FlexLogic operand (digital input preferred)
Time Delay:............................................................0.10 to 600.00 s in steps of 0.01 s
Timing Accuracy:................................................±100 ms or ±0.5% of total time
SEQUENTIAL SHUTDOWN
Arming Input: ........................................................Configurable to any FlexLogic operand
Pickup Level:..........................................................0.02 to 0.99 x Rated MW in steps of 0.01
Power Direction: ..................................................Low Forward Power or Reverse Power
Time Delay:............................................................0.20 to 180.00 s in steps of 0.01 s
Pickup Accuracy:.................................................see Power Metering
Timing Accuracy:................................................±100 ms or ±0.5% of total time
SWITCH CONTROL
Operation:...............................................................Local (PB control and SLD) and Remote (asserted FlexLogic
operands)
Function: .................................................................Opens/Closes the disconnect switch
Timers: .....................................................................0.000 to 6000.000 s in steps of 0.001 s
SYNCHROCHECK (25)
Maximum Frequency Difference:................0.01 to 5.00 Hz in steps of 0.01 Hz for frequency window of
f
nom
± 5 Hz
Maximum Angle Difference: ..........................1° to 100° in steps of 1°
Maximum Voltage Difference: ......................10 to 600000 V in steps of 1 V
Hysteresis for Maximum Frequency
Difference:.........................................................0.01 to 0.10 Hz in steps of 0.01 Hz
Breaker Closing Time:.......................................0.000 to 6000.000 s in steps of 0.001 s
Dead Source Function: .....................................None, LB & DL, DB & LL, DB & DL, DB OR DL, DB XOR DL
Dead/Live Levels for Bus and Line:.............0.00 to 1.50 x VT in steps of 0.01 x VT