GE Multilin 850 Instruction Manual page 22

SPECIFICATIONS
1–12
AUXILIARY UNDERVOLTAGE (27X)
Operating Parameter: ...................................... Vx (Phasor)
Minimum Voltage: .............................................. 0.00 to 1.50 x VT in steps of 0.01 x VT
Pickup Level: ......................................................... 0.00 to 1.50 x VT in steps of 0.01 x VT
Dropout Level:...................................................... 102 to 103% of Pickup
Level Accuracy: ................................................... ± 0.5% of reading from 10 to 208 V
Undervoltage Curves:....................................... Definite Time, GE IAV Inverse Time or FlexCurves A/B/C/D
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Operate Time: ...................................................... < 20 ms at 0.90 x pickup at 60 Hz
Curve Timing Accuracy:.................................. at < 0.90 x pickup: ± 3.5% of curve delay or ± ½ cycle
BROKEN CONDUCTOR
Minimum Operating Positive Current:....... 0.05 to 1.00 x CT in steps of 0.01 x CT
Maximum Operating Positive Current: ..... 0.05 to 5.00 x CT in steps of 0.01 x CT
Pickup Level: ......................................................... 20.0% to 100.0% in steps of 0.1%
Dropout Level:...................................................... 97% to 98% of the Pickup Level
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¾ cycle (whichever is greater)
DIRECTIONAL POWER (32)
Measured Power:................................................ 3-phase
Number of Stages: ............................................. 2
Characteristic Angle:......................................... 0º to 359º in steps of 1°
Calibration Angle: ............................................... 0.00º to 0.95º in steps of 0.05°
Power Pickup Range: ........................................ –1.200 to 1.200 x Rated Power in steps of 0.001
Pickup Level Accuracy: .................................... ± 1% or ± 0.001 x Rated Power, whichever is greater
Hysteresis: ............................................................. 2% or 0.001 x Rated Power, whichever is greater
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001 s
Operate Time: ...................................................... < 55 ms at 1.1 x pickup at 60 Hz
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
FAST UNDERFREQUENCY
Operating Parameter: ...................................... Frequency and rate of change of frequency
UF Pickup Level:................................................... 20.00 to 65.00 Hz in steps of 0.01 Hz
df/dt Pickup Level:.............................................. -10.00 to -0.10 Hz/s in steps of 0.01 Hz/s
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
Frequency Accuracy:........................................ ± 0.01 Hz
Timer Accuracy:.................................................. ± 3% of operate time or ± ¼ cycle (whichever is greater)
FLEXELEMENTS
Number of elements: ........................................ 8
Operating signal: ................................................ Any analog actual value, or two values in a differential mode
Operating signal mode: ................................... Signed, or Absolute value
Operating mode:................................................. Level, Delta
Comparison direction:...................................... Over, Under
Pickup Level: ......................................................... -30.000 to 30.000 pu in steps of 0.001 pu
Hysteresis: ............................................................. 0.1 to 50.0% in steps of 0.1%
Delta dt:................................................................... 40 msec to 45 days
Pickup and dropout delays:........................... 0.000 to 6000.000 s in steps of 0.001 s
< 25 ms at 0.90 x pickup at 50 Hz
(whichever is greater) from pickup to operate
from pickup to operate
< 65 ms at 1.1 x pickup at 50 Hz
from pickup to operate
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION