CHAPTER 2: PRODUCT DESCRIPTION SPECIFICATIONSG30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 2-292VAR-HOURS (POSITIVE AND NEGATIVE)Accuracy: ±2.0% of readingRange: ±0 to 1 × 10 6 MvarhParameters: three-phase onlyUpdate rate: 50 msCURRENT HARMONICSHarmonics: 2nd to 25th harmonic: per phase, displayed as a % of f1 ( fundamental frequency phasor)THD: per phase, displayed as a % of f1Accuracy:HARMONICS: 1. f 1 > 0.4pu: (0.20% + 0.035% / harmonic) of reading or 0.15% of 100%, whichever is greater2. f 1 < 0.4pu: as above plus %error of f 1THD: 1. f 1 > 0.4pu: (0.25% + 0.035% / harmonic) of reading or 0.20% of 100%, whichever is greater2. f 1 < 0.4pu: as above plus %error of f 1VOLTAGE HARMONICSHarmonics: 2nd to 25th harmonic: per phase, displayed as a % of f1 ( fundamental frequency phasor)THD: per phase, displayed as a % of f1Accuracy:HARMONICS: 1. f 1 > 0.4pu: (0.20% + 0.035% / harmonic) of reading or 0.15% of 100%, whichever is greater2. f 1 < 0.4pu: as above plus %error of f 1THD: 1. f 1 > 0.4pu: (0.25% + 0.035% / harmonic) of reading or 0.20% of 100%, whichever is greater2. f 1 < 0.4pu: as above plus %error of f 1FREQUENCYAccuracy atV = 0.8 to 1.2 pu: ±0.001 Hz (when voltage signal is used for frequency measurement)I = 0.1 to 0.25 pu: ±0.005 HzI > 0.25 pu: ±0.02 Hz (when current signal is used for frequency measurement)2.5.5 InputsAC CURRENTCT rated primary: 1 to 50000 ACT rated secondary: 1 A or 5 A by connectionRelay burden: < 0.2 VA at rated secondaryConversion range:Standard CT: 0.02 to 46 × CT rating RMS symmetricalSensitive Ground CT module: 0.002 to 4.6 × CT rating RMS symmetricalCurrent withstand: 20 ms at 250 times rated1 sec at 100 times ratedcontinuous 4xInomShort circuit rating: 150000 RMS symmetrical amperes, 250 V maximum (primary current to external CT)AC VOLTAGEVT rated secondary: 50.0 to 240.0 VVT ratio: 1.00 to 24000.00Relay burden: < 0.25 VA at 120 VConversion range: 1 to 275 VVoltage withstand: continuous at 260 V to neutral1 min/hr at 420 V to neutralFREQUENCYNominal frequency setting: 25 to 60 HzSampling frequency: 64 samples per power cycleTracking frequency range: 3 to 70 Hz
