CIRCUIT BREAKER ACB meo class4
MCB - Miniature circuit breaker- 5- 50 amp MCCB - moduled case circuit breaker 50-1500amp ACB - Air Circuit breaker- 400-2000amps Acb safeties Arc runner arc chutes Breaker open fast before taking out acb Simultaneous closing of all 3 units of each phase. Breaking speed as High as possible.