Monitoring - GE 845 Instruction Manual

SPECIFICATIONS

Monitoring

1–18
SYNCHROCHECK (25)
Maximum Frequency Difference: ............... 0.01 to 5.00 Hz in steps of 0.01 Hz for frequency window of
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
TRIP BUS
Number of Elements: ........................................ 6
Number of Inputs: .............................................. 16
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: ...................................................... < 2 ms at 60 Hz
Timer Accuracy:.................................................. ± 3% of delay time or ± ¼ cycle (whichever is greater) from
HARMONIC DERATING
Timer Accuracy:.................................................. ±3% of delay setting or ±3 cycle (whichever is greater) from
TRIP CIRCUIT MONITOR (TCM)
Applicable Voltage: ............................................ 20 to 250 VDC
Trickle Current:.....................................................1 to 2.5 mA
Timing Accuracy:................................................ ± 3 % or ± 4 ms, whichever is greater
CLOSE CIRCUIT MONITOR (CCM)
Applicable Voltage: ............................................ 20 to 250 VDC
Trickle Current:.....................................................1 to 2.5 mA
Timing Accuracy:................................................ ± 3 % or ± 4 ms, whichever is greater
BREAKER ARCING CURRENT
Mode:........................................................................ 3-pole
Principle: ................................................................. accumulates breaker duty (I
Initiation:................................................................. any operand
Alarm Threshold:................................................. 0 to 50000 kA2-cycle in steps of 1 kA2-cycle
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
BREAKER HEALTH
Timer Accuracy:.................................................. ± 3% of delay setting or ± 1 cycle (whichever is greater) from
POWER FACTOR (55)
Switch-In Level:.................................................... 0.01 Lead to 1 to 0.01 Lag in steps of 0.01
Dropout Level:...................................................... 0.01 Lead to 1 to 0.01 Lag in steps of 0.01
Delay: ....................................................................... 0.000 to 6000.000 s in steps of 0.001 s
Minimum Operating Voltage:........................ 0.00 to 1.25 x VT in steps of 0.01 x VT
Level Accuracy: ................................................... ± 0.02
Timer Accuracy:.................................................. ± 3% of delay setting or ± 1¼ cycle (whichever is greater)
FAULT REPORTS
Number of Reports: ........................................... 15
Captured Data: .................................................... Pre-fault and fault phasors for all CT and VT banks, pre-fault
f ± 5 Hz
nom
pickup to operate
pickup to operate
from pickup to operate
pickup to operate
from pickup to operate
and fault trigger operands, user-programmable analog
channels 1 to 32
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
2
t) during fault