Mcb Circuit Diagram. According to the above diagram the total load of the house is 15 amp. Mcbs are typically rated up to a current up to 125 a do not have adjustable trip characteristics and can be thermal or thermal magnetic in operation.
In which i shown the single pole mcb miniature circuit breaker which controlled the phase wire line and the neutral is direct. A miniature circuit breaker mcb is an automatically operated electrical switch used to protect low voltage electrical circuits from damage caused by excess current from an overload or short circuit. Different mcbs are used for each room.
The working principle of mcb.
The trip curve of an mcb s b c d k and z curves tell us about the trip current rating of miniature circuit breakers trip current rating is the minimum current at which the mcb will trip instantaneously. In distribution board we get phase wire supply from the main. According to the above diagram the total load of the house is 15 amp. The main function of an mcb is to switch the circuit i e to open the circuit which has been connected to it automatically when the current passing through it mcb exceeds the value for which it is set.
