1–26 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALSPECIFICATIONS CHAPTER 1: INTRODUCTIONMeteringRMS PARAMETERSCurrentsParameters:........................................................... Phase A, B, C, Neutral, GroundAccuracy: ............................................................... ± 0.25% of reading or ± 0.2% of rated (whichever is greater)from 0.1 to 2.0 x CT± 1% of reading > 2.0 x CTVoltagesParameters:........................................................... Wye VTs: A-n, B-n, C-n, A-B, B-C, C-A, Average Phase, Neutraland ResidualDelta VTs: A-B, B-C, C-A, Neutral and ResidualAccuracy: ............................................................... ± 0.5% of reading from 15 to 208 V± 1% for open Delta connectionsReal Power (Watts)Range:...................................................................... -214748364.8 kW to 214748364.7 kWParameters:........................................................... 3-phase; per phase if VT is WyeAccuracy: ............................................................... ± 1.0% of reading or 0.2 kW (whichever is greater) at -0.8 <PF ≤ -1.0 and 0.8 < PF < 1.0Reactive Power (Vars)Range:...................................................................... -214748364.8 kvar to 214748364.7 kvarParameters:........................................................... 3-phase; per phase if VT is WyeAccuracy: ............................................................... ± 1.0% of reading or 0.2 kvar (whichever is greater) at -0.2 <PF ≤ 0.2Apparent Power (VA)Range:...................................................................... 0 kVA to 214748364.7 kVAParameters:........................................................... 3-phase; per phase if VT is WyeAccuracy: ............................................................... ± 1.0% of reading or 0.2 kVA (whichever is greater)Power FactorParameters:........................................................... 3-phase; per phase if VT is WyeRange:...................................................................... 0.01 Lag to 1.00 to 0.01 LeadAccuracy: ............................................................... ± 0.02 for 50 Hz and 60 Hz; ± 0.05 for 25 HzWatt-hours (positive and negative)Range:...................................................................... - 2147483.648 MWh to 2147483.647 MWhParameters:........................................................... 3-phase onlyUpdate Rate:......................................................... 50 msAccuracy: ............................................................... ± 2.0% of readingVar-hours (positive and negative)Range:...................................................................... - 2147483.648 Mvarh to 2147483.647 MvarhParameters:........................................................... 3-phase onlyUpdate Rate:......................................................... 50 msAccuracy: ............................................................... ± 2.0% of readingPHASORSCurrentParameters:........................................................... Phase A, B, C, Neutral and GroundMagnitude Accuracy: ....................................... ± 0.5% of reading or ± 0.2% of rated (whichever is greater)from 0.1 to 2.0 x CT± 1.0% of reading > 2.0 x CTAngle Accuracy: .................................................. 2° (3° for 25 Hz)For 50:0.025 CT between 0.5A to 15A:CBCT Angle Accuracy:...................................... ± 25°
