Reverse wiring self-protection circuit and solid-state circuit breaker including the same

A solid-state circuit breaker for direct current (DC) power, comprising:

• a solid-state switch connected on a live wire of the solid-state circuit breaker;
• an isolating switch connected between the solid-state switch and the DC power, and configured to isolate or close a connection between the solid-state circuit breaker and the DC power;
• a tripping coil configured, in response to receiving a driving signal, to trip the isolating switch using tripping electric energy provided by an auxiliary power module;
• and
• a reverse wiring self-protection circuit comprising:
• the auxiliary power module, wherein the auxiliary power module is configured to provide the tripping electric energy to the tripping coil of the solid-state circuit breaker before the isolating switch of the solid-state circuit breaker is closed;
• a reverse wiring determination module configured to determine whether the DC power connected to the solid-state circuit breaker is reversely wired, and to output a first driving enable signal enabling a driving circuit module in response to the DC power being reversely wired, wherein the driving circuit module is configured to transmit a driving signal indicating tripping operation to the tripping coil in response to the first driving enable signal to thereby isolate the connection between the solid-state circuit breaker and the DC power.

A circuit comprising:

• a solid-state switch connected on a live wire of a solid-state circuit breaker;
• an isolating switch of the solid-state circuit breaker, wherein the isolating switch is connected between the solid-state switch and direct current (DC) power;
• a tripping coil configured, in response to a driving signal, to open the isolating switch using tripping electric energy to thereby isolate a connection between the solid-state circuit breaker and the DC power;
• and
• a reverse wiring self-protection circuit comprising:
• an auxiliary power module configured to provide the tripping electric energy before the isolating switch is closed, wherein the auxiliary power module includes a trip energy storage unit, an auxiliary power circuit, and a rectifier configured to rectify the DC power as a rectified voltage, and to provide the rectified voltage to the auxiliary power circuit, wherein the auxiliary power circuit is configured to generate the tripping electric energy based on the rectified voltage and provide the tripping electric energy to the trip energy storage circuit;
• and
• a reverse wiring determination module configured to determine whether the DC power is reversely wired, and to output a first driving enable signal enabling a driving circuit module in response to the DC power being reversely wired, wherein the reverse wiring determination module comprises:
• a voltage detection unit configured to detect a voltage of the DC power;
• a threshold comparison unit configured to compare the voltage of the DC power with a threshold to thereby determine whether the DC power is reversely wired;
• and
• a driving circuit module configured to transmit a driving signal indicating a tripping operation to the tripping coil in response to the first driving enable signal, thereby isolating the connection between the solid-state circuit breaker and the DC power.