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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
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Title A Study on the Harmonics Effect of Disc-Type Over Current Ground Relay for Emergency Generator Protection
Authors Kyung-Chul Kim ; Hun Kho
DOI http://dx.doi.org/10.5207/JIEIE.2015.29.6.058
Page pp.58-62
ISSN 1225-1135
Keywords Emergency Generator ; Overcurrent Ground Relay ; Harmonics Effect
Abstract When an emergency generator is running, it supplies the power for critical loads. Generator protection requires the consideration of many abnormal conditions that may occur with generators include overvoltages and ground faults. Modern day power systems create harmonics within the electrical network that can have an impact upon the associated protective system. This paper focuses on the analysing of the cause and development of a solution for the malfunction of induction disc type overcurrent ground relay by generation of harmonics during emergency generator operation.