A Method for Restraining Electromagnetic Interference of Electricity Meter by Means of Pulse Width Testing Circuit

Wenfang Liu, ChongMin Song, Jun Zhao

Abstract

This paper describes a method for restraining electromagnetic interference received by reference meter clearly not caused by watt-hour meter under test by means of pulse width testing circuit. The method is adopted to resolve the problems often occurred in the type tests of watt-hour meters. During the EMC test of watt-hour meters, the tester can’t confirm the additional error due to the impact of fast transient burst because the reference meter as the auxiliary instrument in the test is impacted and display the wrong percentage error. We resolve the test problem caused from the disturbance impulse coupling to the signal wires of the reference meter by means of pulse width testing circuit. The design of the impulse width testing circuit and the experiment setup are reported.

Keywords

impulse width test, electromagnetic interference, restrain, immunity test, method

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IMEKO-TC4-2013-095.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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