Solid state circuit breaker

A solid state circuit breaker, connected to a circuit to be protected, wherein the solid state circuit breaker comprises:

• a first switch connected in series with the circuit to be protected;
• a second switch connected in series with the first switch in the circuit to be protected;
• an operation switch connected to the second switch, the second switch being closed in a case that the operation switch is in a closed position, and the second switch being opened in a case that the operation switch is in an opened position;
• a micro switch connected to the operation switch, and capable of being driven to a predetermined opened position by the operation switch during a process of the operation switch being switched from the closed position to the opened position, wherein during a process of the operation switch being switched from the opened position to the closed position, the micro switch is configured to be driven to a predetermined closed position by the operation switch;
• a position detection circuit having an input terminal connected to the micro switch, the position detection circuit being capable of generating an opening feedback signal in a case that the micro switch is driven to the predetermined opened position;
• a control unit having a first input terminal connected to an output terminal of the position detection circuit to receive the opening feedback signal, the control unit being capable of generating a predetermined opening signal based on the opening feedback signal;
• and
• a first on-off circuit having an input terminal connected to a first output terminal of the control unit to receive the predetermined opening signal and an output terminal connected to a control terminal of the first switch to open the first switch under a control of the predetermined opening signal.