Calibration of wattmeters for standby power testing to IEC 62301

A system for the calibration of wideband wattmeters used in the measurement of standby electrical power in accordance with IEC 62301 has been developed at the National Measurement Institute, Australia (NMIA). The system has been tested with current waveforms having crest factors up to 20 and has uncertainties significantly lower than those required by the standard.