대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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- Pages.340-343
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- 2001
저압차단기기의 보호협조
The Protective Co-ordination between Low-Voltage Circuit-Breaker
- 박성찬 (LG산전 전력연구소 전력기기연구팀) ;
- 오준식 (LG산전 전력연구소 전력기기연구팀) ;
- 이방욱 (LG산전 전력연구소 전력기기연구팀) ;
- 유만종 (LG산전 전력연구소 전력기기연구팀) ;
- 서정민 (LG산전 전력연구소 전력기기연구팀)
- Park, S.C. (Electro Technology R&D Center, LG Industrial systems) ;
- Oh, J.S. (Electro Technology R&D Center, LG Industrial systems) ;
- Lee, B.W. (Electro Technology R&D Center, LG Industrial systems) ;
- Ryu, M.J. (Electro Technology R&D Center, LG Industrial systems) ;
- Seo, J.M. (Electro Technology R&D Center, LG Industrial systems)
- 발행 : 2001.11.16
초록
In an electrical network, electrical power are transmitted by a various of protection, isolation and control electric circuit devices. This thesis deals with the protection function between circuit-breakers. The protective coordination concerns the behaviour of two devices placed in series in an electrical network, with a short-circuit downstream circuit-breaker. It has two basic principles: First, discrimination which is an increasing requirement of low voltage electrical distribution systems. Second, which is less well known: cascading, which consists of installing a device, whose breaking capacity is less than the three-phase short-circuit current at its terminals and helped by main circuit-breaker. The important advantage of cascading is to be able to install at a branch circuit-breaker of a lesser performance without endangering the safety of the installation for more economical usage. To determine and guarantee co-ordination between two circuit breakers, it is necessary to carry out a theoretical approach, first, and then confirm the results by means of standard tests. This is illustrated in appendix A of IEC 947-2.
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