Summary
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo
2019
Session Number:WedPM2Po
Session:
Number:WedPM2Po.11
Misreadings of Static Energy Meters Due to Conducted EMI Caused by Fast Changing Current
Bas ten Have, Tom Hartman, Niek Moonen, Frank Leferink,
pp.-
Publication Date:2016/10/5
Online ISSN:2188-5079
DOI:10.34385/proc.58.WedPM2Po.11
Summary:
Readings of static energy meters can be affected by conducted electromagnetic interference (EMI). Previous research reported many cases where lower and higher readings of static energy meters were observed. In this paper experiments with a water pump, controlled by speed regulators, resulted in huge errors in energy readings of static meters with respect to a reference meter. The speed regulators are intended to be used in conjunction with such water pumps. The tests were performed using a non-distorted mains power supply created by a four-quadrant amplifier with an internal impedance in accordance with the standards. The deviations observed are between -91% and +175% compared to the reference meter. The current waveforms attributed to these large deviations show large spikes with rise times of a few microseconds.