GE 845 User Manual

1–18 845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
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
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
pickup to operate
Monitoring
HARMONIC DERATING
Timer Accuracy:..................................................±3% of delay setting or ±3 cycle (whichever is greater) from
pickup to operate
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
2
t) during fault
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)
from pickup to operate
BREAKER HEALTH
Timer Accuracy:..................................................± 3% of delay setting or ± 1 cycle (whichever is greater) from
pickup to operate
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)
from pickup to operate
FAULT REPORTS
Number of Reports: ...........................................15
Captured Data: ....................................................Pre-fault and fault phasors for all CT and VT banks, pre-fault
and fault trigger operands, user-programmable analog
channels 1 to 32

GE 845 Specifications

General

Brand	GE
Model	845
Category	Protection Device
Language	English