What is the Inside a MCB ( Circuit Breaker ) - MCB Dismantle

What is the Inside a MCB ( miniature circuit breaker ) MCB is an automatically operated electromechanical switch it is specially designed to protect an electrical circuit from damage caused by the excess current in case of an overload or short circuit condition. The basic function of MCB is to interrupt current flow in the circuit after a fault or overload are detected. It Disconnect the contact of the circuit from supply if the supply current exceeds the rated current of MCB. This Electrical contact breaking operation of MCB helps a lot to secure the circuit from faults and thus helps to protect other electrical devices connected with the fault circuit. MCBs are reusable even after interruption of the circuit and they are more sensitive to faults MCB has two different tripping mechanisms, the delayed thermal tripping mechanism for overload protection and Instant tripping mechanism the magnetic tripping mechanism for short circuit protection The working principle of the MCB is based on two effects 1. Electromagnetic Effect. 2. Thermal Effect