Mccb Breaker Single Phase. For dc or 1 phase ac applications use the two outside poles of the 3 pole circuit breaker g frame circuit breakers are available as a single unit or with accessories pre installed only. Best price single phase mccb 2 pole 63 amp 1000v mccb circuit breaker.
It stands for miniature circuit breaker. Rated current up to 1600a. Sudden changes in electrical load can cause a small brief current flow to earth especially in old appliances.
It is available from 32 amps to 1600 amps with the voltage range of 230v to 1 1kv.
Replacing an mcb with an rcbo of the same rating is generally safe. It is now possible to get an mcb and and rcd in a single unit called an rcbo see below. Rcds are very sensitive and operate very quickly. The main difference between the two is the capacity mcbs are rated under 100 amps with an interrupting rating of under 18 000 amps.
