Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Improvement of Circuit-Time Product through Analysis of Operating Time of Earth Leakage Circuit-Breakers

누전차단기의 트립 동작시간 분석을 통한 전류·시간적(積) 개선

  • Kim, Ju-Chul (Sangdo E&GC Co., Ltd., Corporate R&D Institutes, Chief Technology Officer) ;
  • Lee, Sang-Joong (Seoul National University of Science and Technology, Department of Electrical Engineering)
  • 김주철 (상도전기통신(주) 부설연구소) ;
  • 이상중 (서울과학기술대학교 전기정보공학과)
  • Received : 2012.09.18
  • Accepted : 2012.10.24
  • Published : 2012.12.30
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Abstract

The earth leakage circuit-breakers installed to protect the human body against electrical shock have conventionally had a sensitivity current of 30 mA and an operating time of 30 ms or less. No reviews are found, however, on the operating time of the current conducting through the human body due to the electrical shock or ground fault. This paper measures the trip-operating time against the earth leakage under the condition of increased current as well as under the condition of rated sensitivity current of the earth leakage circuit-breakers. Further measurement with a prototype model showed an improved operating time of 16 ms or less under the condition of rated sensitivity current. It is expected that development of circuit-breakers with higher safety is possible if the performance of the electronic circuit can be improved.

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References

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