MCCB 차단기 WLM8LY-250H-3300 WLM8LY 시리즈 지상 누설 보호 유형 잔류 전류 400V 250A 3극

RCCB (Residual Current Circuit Breaker) is an electrical device used to protect personal safety and prevent fires. Mainly used to detect leakage current in circuits. Once the leakage current exceeds the set value, RCCB will quickly cut off the circuit to avoid electric shock accidents and fires. RCCB is widely used in household, commercial and industrial fields and is a very important electrical protection device.