Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference (한국조명전기설비학회:학술대회논문집)
- 2009.10a
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- Pages.343-346
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- 2009
Protection ability for lightning surge according to the grounding system of low voltage power systems
저압 전원계통 접지방식별 뇌서지보호성능
- Lee, Bok-Hee ;
- Lee, Gyu-Sun ;
- Choi, Jong-Hyuk ;
- Yoo, Yang-Woo ;
- Kim, Dong-Sung ;
- Kang, Sung-Man ;
- Ann, Chang-Hwan
- 이복희 (인하대학교 IT공대 전기공학과) ;
- 이규선 (인하대학교 IT공대 전기공학과) ;
- 최종혁 (인하대학교 IT공대 전기공학과) ;
- 유양우 (인하대학교 IT공대 전기공학과) ;
- 김동성 (인하대학교 IT공대 전기공학과) ;
- 강성만 (대한전기협회) ;
- 안창환 (인하공업전문대학)
- Published : 2009.10.09
Abstract
The grounding system of low voltage power systems is TT grounding system in Korea. In order to follow the international standard, TN grounding system is adopted. However, the performance of grounding systems has not been evaluated. This paper deals with the experimental results of protection ability of grounding system when lightning surge invades to the neutral line of low voltage power system. As a result, the TT grounding system is most frail for the lightning surge and it does not protect the electrical devices. On the other hand, the TN grounding system perfectly protects the electrical equipment and prevents the electric shock for human through the equipotential bonding. In case of TN system with supplement grounding, it is very important to lower the supplement grounding resistance to protect the electrical equipment and electric shock for human.
Keywords