저압 아크 고장 차단 기술에 대한 기초 조사 연구 = A Basic Survey Study about the Breaking Technology of Arc Fault in Low Voltage Electrical System

다국어 초록 (Multilingual Abstract)

The ELCB(Earth Leakage Circuit Breaker) determines whether the earth leakage is or not by comparing the sensitive current furnished from ZCT(Zero Current Transformer) with the predefined threshold value. However, it can not recognize the arc fault in which the magnitude of fault current is very small and so, the arc fault is expanded into very severe electrical fire. The America has propelled making the laws for the arc fault protection from 1999, and NEC(National Electrical Code) defines and mandates the installation of the AFCI(Arc Fault Current Interrupter)s in diverse places such as bedroom, living room, dinner room, sunroom and closets in 2008. GE and Siemens developed the determination technology of arc fault by making R&D effort for AFCI practicalization, and to mitigate the electrical fire, the developed AFCIs are applied widely to home. However, the effort of us about this field is insufficient, and the level also is very low. Accordingly, this paper surveys and analyzes systematically the basic technology needed in developing the arc fault determination technology.

Key Words : AFCI, Electrical Panel, ELCB, ZCT, NEC