The plug-in circuit breaker has a base to which a copper bar or cable is connected, and the circuit breaker is inserted through a plug.
The drawout type has a frame, which is installed on the base. The copper bar or cable is connected to the base, and the circuit breaker is inserted into the base through the plug. There is a mechanism on the frame to cooperate with the circuit breaker body, which is mainly to save labor and maintain consistency in plugging and unplugging operation. It is very laborious to plug and unplug the circuit breaker above 400A, and it is easy to damage the plug by plugging and unplugging without handle.