IEC 60364 표준의 적용을 위한 기술성 분석

초록

In the recent year the works to study the appropriate measures in application of KS C IEC 60364 standard in domestic electrical installations are successively carried out. In this paper, generally accepted two methods of estimating the cross-sectional area of protective conductor in TN systems which are the most frequently used grounding systems in low-voltage(LV) power systems are examined from technical and economical standpoints. Consequently, it is confirmed that the technical and economical efficiencies are both favored when residual current operated circuit-breakers with integral overcurrent protection for household and similar uses(RCBOs) are applied as a protective device against short-circuit and ground faults. The conclusion obtained from this work could be a good reference in the design of LV power systems for different areas of electrical installations such as office buildings, computer centers, apartment houses, power plants, and etc.