Control - GE 850 Instruction Manual

SPECIFICATIONS

Control

1–26
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,
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle, (whichever is greater)
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
Adjustability: ......................................................... Current supervision can adjust the maximum number of
Timer Accuracy:.................................................. ± 3% of delay setting or ± ¼ cycle (whichever is greater)
BREAKER CONTROL
Operation: .............................................................. Asserted FlexLogic Operands
Function:................................................................. Opens/closes, blocks, bypasses blocks to the feeder breaker
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
whichever is greater
For > 2.0 x CT: ± 1.5% of reading
from pickup to operate
the setting group
shots attempted
from pickup to operate
(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
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION