GE Multilin 850 Instruction Manual page 32

SPECIFICATIONS
1–22
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
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)
Reset Time: ............................................................ < 10 ms typical at 2 x Pickup at 60 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
CT SUPERVISION 1 (CTS)
Operating Parameter: ...................................... Ia, Ib, Ic and Ig (Fundamental Phasor Magnitude)
3I0 Pickup Level:.................................................. 0.050 to 30.000 x CT in steps of 0.001 x CT (phase CT)
IG Pickup Level:.................................................... 0.050 to 30.000 x CT in steps of 0.001 x CT (ground CT)
3V0 Pickup Level: ................................................ 0.02 to 3.00 x VT in steps of 0.01 x VT (phase VT)
Dropout Level:...................................................... 97% to 98% of Pickup
CTS Diff. Pickup Level:....................................... 0.050 to 30.000 x CT in steps of 0.001 x CT
Quotient Pickup Level:...................................... 0.00 to 1.00 (lmin/lmax)
Slope Range: ......................................................... 0 to 100% in steps of 1%
Pickup Delay:........................................................ 0.000 to 6000.000 s in steps of 0.001 s
Level Accuracy: ................................................... For 0.1 to 2.0 x CT: ±0.5% of reading or ±0.4% of rated
Operate Time: ...................................................... < 12 ms typical at 3 x Pickup at 60 Hz
Timer Accuracy:.................................................. ±3% of delay setting or ±¼ cycle (whichever is greater) from
POLE DISCORDANCE PROTECTION (52)
Operating Parameter: ...................................... Contact inputs 52a and 52b per phase, Phase currents Ia, Ib,
Current Limit: ........................................................ 0.000 to 1.000 x CT in steps of 0.001 x CT
Dropout Level:...................................................... 97 to 98% of Current Limit
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Level Accuracy (Current): ................................0.1 < I < 2.0 x CT: ±0.5% of reading or ±0.4% of rated
Timer Accuracy:.................................................. ±3% of operate time or ±1 cycle (whichever is greater)
SWITCH CONTROL
Operation: .............................................................. Local (PB control and SLD) and Remote (asserted FlexLogic
Function:................................................................. Opens/Closes the disconnect switch
Timers:..................................................................... 0.000 to 6000.000 s in steps of 0.001 s
(whichever is greater),
For > 2.0 x CT: ± 1.5% of reading
from pickup to operate
< 12 ms typical at 2 x Pickup at 50 Hz
Va, Vb, Vc (Fundamental Phasor Magnitude)
(whichever is greater)
For > 2.0 x CT: ±1.5% of reading
< 15 ms typical at 3 x Pickup at 50 Hz
pickup to operate
Ic from breaker CTs
(whichever is greater)
I > 2.0 x CT: ±1.5% of reading
operands)
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION