Small circuit breaker starts the circuit directly

There are many models of small circuit breakers, such as CN45, with a rated current of 63A and dozens of tripping currents ranging from 3A to 63A. According to the rated current and working characteristics of the small motor, select a small circuit breaker with appropriate tripping current as the operating switch of the motor. It is not only easy to operate, but also can effectively protect the motor from overload. In the circuit shown in the figure, the fuse FU is used for short-circuit protection and can cut off the power supply when the fuse QF is inspected.