GE Multilin 850

CHAPTER 1: INTRODUCTION SPECIFICATIONS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–21
WATTMETRIC GROUND FAULT (32N)
Measured Power: ................................................zero-sequence
Characteristic Angle:.........................................0º to 359º in steps of 1°
Power Pickup Range:.........................................0.001 to 1.200 CT x VT in steps of 0.001
Pickup Level Accuracy: ....................................± 1% or ± 0.0025 CT x VT, whichever is greater
Hysteresis:..............................................................3% or 0.001 CT x VT, whichever is greater
Curve: .......................................................................Definite Time, Inverse Time, or FlexCurve
Operating Voltage Pickup Level:..................0.02 to 3.00 x VT in steps of 0.01 x VT
Operating Current Pickup Level:..................0.002 to 30.000 x CT in steps of 0.001 x CT
Power Pickup Delay:..........................................0.000 to 6000.000 s in steps of 0.001 s
Inverse Time Multiplier:....................................0.01 to 2.00 s in steps of 0.01 s
Operate Time:.......................................................< 40 ms at 1.1 x pickup at 60 Hz,
< 47 ms at 1.1 x pickup at 50 Hz
Curve Timing Accuracy: ..................................± 3% of curve delay or ± ¾ cycle (whichever is greater) from
pickup to operate
Control
AR CURRENT SUPERVISION AND AR ZONE COORDINATION
Operating Parameter:.......................................Ia, Ib, Ic, In (Fundamental Phasor Magnitude)
PIckup Level:..........................................................0.050 to 30.000 x CT in steps of 0.001 x CT
Dropout Level: ......................................................97 to 98% of Pickup
Level Accuracy:....................................................For 0.1 to 2.0 x CT: ± 0.5% of reading or ± 0.4% of rated,
whichever is greater
For > 2.0 x CT: ± 1.5% of reading
Timer Accuracy:..................................................± 3% of delay setting or ± ¼ cycle, (whichever is greater)
from pickup to operate
ARC FLASH SENSOR/FIBER
Number of Point Sensors: ...............................4
Detection Radius:................................................180 degree
Maximum Fiber Length (Point Sensor): .....18 ft
Fiber Size:................................................................1000 um
Mode:........................................................................Multi-mode
Connector:..............................................................Small Media Interface (SMI)
Fiber Type:..............................................................Plastic Optical Fiber
Bend Radius: .........................................................>25 mm
AUTORECLOSE (79)
Number of Breakers: .........................................Single breaker application
Number of Poles:.................................................3-pole tripping/autoreclose schemes
Reclose attempts:...............................................Up to 4 before lockout
Blocking:..................................................................Each reclose shot can block IOC, raise TOC Pickup or change
the setting group
Adjustability:..........................................................Current supervision can adjust the maximum number of
shots attempted
Timer Accuracy:..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
BREAKER CONTROL
Operation:...............................................................Asserted FlexLogic Operands
Function: .................................................................Opens/closes, blocks, bypasses blocks to the feeder breaker