보호거리와 부하특성에 따른 SPD 보호효과 영향

초록

This paper deals with protection effectiveness of surge protective device depending on the protective distance and load impedance aspects. Through experiments and simulation, we observe exceeding voltage on the protected load higher than SPD residual voltage caused by reflection and oscillation phenomena. The protective performances of SPDs were evaluated and discussed in various conditions related to load impedances and cable lengths