GE Multilin 850

1–12 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
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
< 25 ms at 0.90 x pickup at 50 Hz
Curve Timing Accuracy:.................................. at < 0.90 x pickup: ± 3.5% of curve delay or ± ½ cycle
(whichever is greater) from pickup to operate
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)
from pickup to operate
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
< 65 ms at 1.1 x pickup at 50 Hz
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
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