ESS에 적용을 위한 RCD와 CT1 SPD의 서지협조

초록

The L-N mode surge coordination characteristics between CT1 surge protective device(SPD) and residual current device(RCD) were investigated. The test voltage was supplied by a combination generator, capable of outputting a 10 [kV] voltage, 5 [kA] current into a 2 [Ω] load. As a result, the built-in varistors of all sample RCDs against incoming surges were conducted and most of the incoming impulse currents flows into the built-in varistor of RCD. Surge coordination between RCD and CT1 SPDs was not achieved.