금속제 전선관 회로정수의 주파수의존성

초록

This paper deals with frequency-dependent circuit parameters of metal conduits. The use of nonmagnetic conduit should be taken into account in order to reduce the inductance of battery charger distribution circuits. The frequency-dependent impedance of steel and aluminium conduits and switching surge voltages generated at the circuit consisted of steel and aluminium conduits were investigated. As a result, the switching surge voltages generated through Al conduit are significantly lower than those through steel conduit when DC fault current is interrupted.