INSTALLATION

     MCB

The circuit breaker is a device for making and breaking a circuit

Miniature Circuit Breakers (mcb), which are commonly used in domestic installations, incorporate most of the features of the circuit breaker in a compact form and are being fitted in place of fuses in consumer units in the home or office. An MCB eliminates the cost of fuse replacement and may be used as a switch for isolating the mcb, the automatic operation is by magnetic or thermal means. The reason for the two characteristics is to have proper operation during both short circuit and overload conditions

Advantages of mcb s over fuses are

− Non-destructive determination of tripping characteristics

− Shorter tripping times under moderate over currents than with fuses

− Immediate indication of faulty circuit

− Reclosing can be effected at once after the fault has been cleared

− No stock of fuses are required

− Can be easily used as a circuit control switch when needed