Conducted EMI Causing Error Readings of Static Electricity Meters

Abstract

Following initial studies showing that conducted electromagnetic interference (EMI) can lead to large error readings of static electricity meters, VSL performed a thorough verification study confirming that wideband currents produced by non-linear, fast-switching loads indeed can lead to significant error readings of static meters. Key parameters of the EMI causing the errors are a short rise time and large peak height of the current step. When dimming linear or non-linear loads such as heaters and energy-saving lamps, the (lack of) internal filter in the dimmer has a large influence on these key parameters.