Conducted EMI Causing Error Readings of Static Electricity Meters

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.