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http://dx.doi.org/10.5207/JIEIE.2006.20.3.084

Effect of Harmonics on Residual Current Protective Devices  

Jeon, Jeong-Chay (한국전기안전공사 전기안전연구원)
Lee, Sang-Ick (한국전기안전공사 전기안전연구원)
Yoo, Jae-Geun (한국전기안전공사 전기안전연구원)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.20, no.3, 2006 , pp. 84-89 More about this Journal
Abstract
Tripping of residual current protective devices(RCPDs) caused by harmonics has been continuously reported, but no literature is available on the behavior of RCPDs caused by harmonics. This paper, in order to find out the effects of harmonics on RCPDs, investigated the present condition on malfunction of RCPDs and measured harmonics at buildings where nuisance tripping of RCPDs was often occurred. Also, the operational characteristics of RCPDs were tested by the harmonics synthesizer that can generate distorted waveform. Results of experiment detected that there was minimum tripping current of RCPDs when third harmonic added to the fundamental frequency. And it was found that the leakage current to cause tripping of RCPDs increased with more higher order harmonics added to the fundamental frequency.
Keywords
Malfunction; Residual current circuit breakers; Harmonic; Nuisance tripping;
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