GE 845 Instruction Manual page 32

SPECIFICATIONS
1–22
Reactive Power (Vars)
Range:...................................................................... -214748364.8 kvar to 214748364.7 kvar
Parameters:........................................................... 3-phase; per phase if VT is Wye
Accuracy: ............................................................... ± 1.0% of reading or 0.2 kvar (whichever is greater) at -0.2 <
Apparent Power (VA)
Range:...................................................................... 0 kVA to 214748364.7 kVA
Parameters:........................................................... 3-phase; per phase if VT is Wye
Accuracy: ............................................................... ± 1.0% of reading or 0.2 kVA (whichever is greater)
Power Factor
Parameters:........................................................... 3-phase; per phase if VT is Wye
Range:...................................................................... 0.01 Lag to 1.00 to 0.01 Lead
Accuracy: ............................................................... ± 0.02 for 50 Hz and 60 Hz; ± 0.05 for 25 Hz
Watt-hours (positive and negative)
Range:...................................................................... - 2147483.648 MWh to 2147483.647 MWh
Parameters:........................................................... 3-phase only
Update Rate:......................................................... 50 ms
Accuracy: ............................................................... ± 2.0% of reading
Var-hours (positive and negative)
Range:...................................................................... - 2147483.648 Mvarh to 2147483.647 Mvarh
Parameters:........................................................... 3-phase only
Update Rate:......................................................... 50 ms
Accuracy: ............................................................... ± 2.0% of reading
PHASORS
Current
Parameters:........................................................... Phase A, B, C, Neutral and Ground
Magnitude Accuracy: ....................................... ± 0.5% of reading or ± 0.2% of rated (whichever is greater)
Angle Accuracy: .................................................. 2° (3° for 25 Hz)
Voltages
Parameters:........................................................... Wye VTs: A-n, B-n, C-n, A-B, B-C, C-A, Average Phase, Neutral
Magnitude Accuracy: ....................................... ± 0.5% of reading from 15 to 208 V;
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);
CURRENT AND VOLTAGE HARMONICS
Parameters:........................................................... Magnitude of each harmonic and THD
Range:...................................................................... 2
PF ≤ 0.2
from 0.1 to 2.0 x CT
± 1.0% of reading > 2.0 x CT
and Residual;
Delta VTs: A-B, B-C, C-A, Neutral and Residual
± 1% for open Delta connections;
± 10% for 25 Hz with 150 V <V < 208V
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)
nd th
to 25 harmonic: per-phase displayed as % of f
fundamental frequency
THD: per-phase displayed as % of f
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
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