철도차량용 접지방식의 선정 및 접지저항 기준값의 설정에 관한 연구

초록

Varialble voltages(24Vdc ∼ 25kVac) are applied to electric and electronic apparatus inside of rolling stock. Earthing system and resistance is different according to the kind of rolling stock and the material of carbody. The proper establishment of them which have the close relationship with earthing integity is very important thing to design the rolling stock for the safety of passenger and the operating reliability of electric and electronic apparatus. Earthing integrity can be obtained from standardization and quantification of earthing test. It should be considered completely to assure the electrical safety and operating reliability of rolling stock.