공통접지시스템에서 뇌격전류의 분류율 계산을 위한 등가접지임피던스

초록

This paper presents a new method for calculating the distribution ratio of lightning current between each current sharing paths in common grounding system, which is need to allow for the equivalent grounding impedance. The equivalent grounding impedance calculated with the equivalent frequency of lightning current includes the transient characteristics of the grounding electrode considering circuit parameters of R, L, C, G. When the calculated distribution rates are compared with test results, the method using the equivalent grounding impedance is more effective than the method using only the grounding resistance.