GE Multilin 850

CHAPTER 1: INTRODUCTION SPECIFICATIONS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–23
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