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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Protection coordination between residual current device and surge protective devices in low-voltage consumer's installations

저압 수용가 설비에서 누전차단기와 서지방호장치 사이의 보호협조

  • Lee, Bok-Hee (School of Electrical Engineering, Inha University) ;
  • Kim, Hoe-Gu (School of Electrical Engineering, Inha University) ;
  • Park, Hee-Yeoul (School of Electrical Engineering, Inha University) ;
  • Ahn, Chang-Hwan (School of Electrical Engineering, Inha University)
  • 이복희 (인하대학교 IT공대 전기공학부) ;
  • 김회구 (인하대학교 IT공대 전기공학부) ;
  • 박희열 (인하대학교 IT공대 전기공학부) ;
  • 안창환 (인하대학교 IT공대 전기공학부)
  • Received : 2013.03.29
  • Accepted : 2013.04.23
  • Published : 2013.06.30
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Abstract

In this paper, protection coordination between residual current devices and surge protective devices in low-voltage consumer's distribution systems are presented. In the case that a surge protrctive device(SPD) is located on the load side of an residual current device(RCD), when the surge is injected from the source side of the RCD, most of injected surge currents are split into the RCD and the protection coordination between the SPD and RCD is improper, three of 6 specimens experience unintended operation due to test impulse currents. Also when the surges is injected from the load side, a lot of the surge currents is split into the SPD, but a half of test specimens causes nuisance trip. Coordination between SPD and RCD is not valid. When installing SPD, it is important to select SPD after due consideration of the protection voltage level of metal oxide varistor embedded in RCD. It is expected that the results obtained from this work could be useful to improve the protection effects of SPD in low-voltage distribution systems.

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References

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