GE 850 User Manual

1–26 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
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
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
(whichever is greater),
For > 2.0 x CT: ± 1.5% of reading
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)
from pickup to operate
Reset Time: ............................................................< 10 ms typical at 2 x Pickup at 60 Hz
< 12 ms typical at 2 x Pickup at 50 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

GE 850 Specifications

General

Brand	GE
Model	850
Category	Protection Device
Language	English