2-28 M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUALSPECIFICATIONS CHAPTER 2: PRODUCT DESCRIPTION2MOTOR LEARNED DATALearned acceleration time accuracy: 1%Learned starting current accuracy: 1%Average motor load learned accuracy: 1%2.5.4 MeteringRMS CURRENT: PHASE, NEUTRAL, AND GROUNDAccuracy at0.1 to 2.0 × CT rating: ±0.25% of reading or ±0.1% of rated (whichever is greater)> 2.0 × CT rating: ±1.0% of readingRMS VOLTAGEAccuracy: ±0.5% of reading from 10 to 208 VREAL POWER (WATTS)Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:±1.0% of reading at –1.0 ≤ PF < –0.8 and 0.8 < PF ≤ 10REACTIVE POWER (VARS)Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:±1.0% of reading at –0.2 ≤ PF ≤ 0.2APPARENT POWER (VA)Accuracy at 0.1 to 1.5 x CT rating and 0.8 to 1.2 x VT rating:±1.0% of readingWATT-HOURS (POSITIVE AND NEGATIVE)Accuracy: ±2.0% of readingRange: ±0 to 1 × 10 6 MWhParameters: three-phase onlyUpdate rate: 50 msVAR-HOURS (POSITIVE AND NEGATIVE)Accuracy: ±2.0% of readingRange: ±0 to 1 × 10 6 MvarhParameters: three-phase onlyUpdate rate: 50 msFREQUENCYAccuracy 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 symmetrical
