Specifications; Device; Protection - GE 850 Instruction Manual

SPECIFICATIONS

Specifications

Device

Protection

1–16
To obtain the total operating time, i.e. from the presence of a trip condition to initiation of a
trip, add 8 ms output relay time to the operate times listed below.
ANNUNCIATOR PANEL
Number of Elements: ........................................ 1 (36 indicators)
Layout:..................................................................... Grid of 2x2 or 3x3
Data Storage:........................................................ Non-volatile memory
Mode:........................................................................ Self-reset, latched, acknowledgeable
Display Text:.......................................................... 3 lines of 15 characters maximum
Visual Indication: ................................................ Flashing: 2Hz @ 50% duty cycle
CUSTOM CONFIGURATIONS
Config Mode: ........................................................ Simplified, Regular
ARC FLASH HS PHASE/GROUND INSTANTANEOUS OVERCURRENT HS 50P/50G
Current:.................................................................... Phasor Magnitude (special high speed algorithm)
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 0.2 x CT: ± 0.2% of reading or 1.5% of rated,
Operate Time: ...................................................... 4 ms at >6 x Pickup at 60 Hz
AUXILIARY OVERVOLTAGE (59X)
Operating Parameter: ...................................... Vx (Phasor)
Pickup Level: ......................................................... 0.00 to 3.00 x VT in steps of 0.01 x VT
Dropout Level:...................................................... 97 to 98% of Pickup
Level Accuracy: ................................................... ±0.5% of reading from 10 to 240 V
Overvoltage Curves:.......................................... Definite Time, Inverse Time, FlexCurves A/B/C/D
Pickup Time Delay: ............................................ 0.000 to 6000.000 s in steps of 0.001s
Dropout Time Delay:......................................... 0.000 to 6000.000 s in steps of 0.001s
Pickup Accuracy: ................................................ 'Auxiliary voltage input channel error
Operate Time: ...................................................... < 30 ms at 1.1 x pickup at 60Hz
Curve Timing Accuracy:.................................. at >1.1 x PKP: 3.5% of operate time ± ½ cycle (whichever is
Timer Accuracy:.................................................. ± 3% of operate time or ± ½ cycle (whichever is greater)
whichever is greater
For > 0.2 x CT: ± 1.5% of reading
5 ms at >6 x Pickup at 50 Hz
4-8 ms at > (3-6) x Pickup at 60 Hz
4-10 ms at > (3-6) x Pickup at 50 Hz
greater) from pickup to operate
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION