GE 889 - Inputs

CHAPTER 1: INTRODUCTION SPECIFICATIONS
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–27
Voltages
Parameters:...........................................................Wye VTs: A-n, B-n, C-n, A-B, B-C, C-A, Average Phase, Neutral
and Residual;
Delta VTs: A-B, B-C, C-A, Neutral and Residual
Magnitude Accuracy:........................................± 0.5% of reading from 15 to 208 V;
± 1% for open Delta connections;
± 10% for 25 Hz with 150 V <V < 208V
Angle Accuracy: ..................................................0.5° (15 V <V < 208 V)
FREQUENCY
Range: ......................................................................2.000 to 90.000 Hz
Accuracy at: ..........................................................V = 15 to 208 V: ± 0.01 Hz (input frequency 15 to 70 Hz);
I = 0.1 to 0.4 x CT: ± 0.020 Hz (input frequency 15 to 70 Hz);
I > 0.4 x CT: ± 0.01 Hz (input frequency 15 to 70 Hz)
CURRENT AND VOLTAGE HARMONICS
Parameters:...........................................................Magnitude of each harmonic and THD
Range: ......................................................................2
nd
to 25
th
harmonic: per-phase displayed as % of f
1
fundamental frequency
THD: per-phase displayed as % of f
1
HARMONIC DETECTION
Operating Parameter:.......................................Current 2
nd
, 3
rd
, 4
th
, 5
th
harmonic or THD per phase
Timer Accuracy: ..................................................Harmonics: ±3% of delay setting or ±1/4 cycle (whichever is
greater) from pickup to operate
THD: ±3% of delay setting or ±3 cycles (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
Inputs
AC CURRENTS
CT Rated Primary:...............................................1 to 12000 A
CT Rated Secondary:.........................................1 A or 5 A based on relay ordering
Nominal Frequency:..........................................50 Hz and 60 Hz
Burden: ....................................................................< 0.2 VA at rated secondary
Conversion Range: .............................................Standard CT: 0.02 to 46 x CT rating RMS symmetrical
Sensitive Ground CT module: 0.002 to 4.6 x CT rating RMS
symmetrical
CBCT (50:0.025): 0 to 15 A
Short Term CT Withstand:...............................1 second at 100 x rated current
2 seconds at 40 x rated current
continuous at 3 x rated current
CBCT (50:0.025) Withstand: ............................continuous 150 mA