Analysis on the Effects of the Induced Noise Voltage with the Grounded or Non-grounded Cable Sheath in the Power Inducting Situation

전력 유도 발생 시 케이블 쉬스 접지 여부에 따른 유도 잡음 전압 영향 분석

This article presents the change characteristics of induced noise whether the sheath layer of the cable is grounded or not. As what affects the induced noise, there are power influence or longitudinal transverse voltages and its weighted filtered voltage. The sheath ground is basicaly predicted to have the effects of alleviation on the power influence. But practically the effects may not happen in the case of common cable's sheath layer. Rather there are cases that the ground of sheath affects so that the noise level could increase. So we need to scrutinize the effects of the sheath gorund in the measures for the protection against electromagnetic induction by powerline or traction line system. And the evaluation of using the designated shielding purpose cable is needed.