Circuit breaker, pipeline cathode protection control method and system, medium and equipment

The invention belongs to the technical field of circuit control, and particularly relates to a circuit breaker, a pipeline cathode protection control method and system, a medium and equipment. The synchronous circuit breaker comprises a first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor and a resistor, the fifth contactor is connected with an external signal device in parallel, one end of the first contactor and one end of the second contactor are connected with the positive electrode of a potentiostat, and the other end of the first contactor is connected with one section of the resistor. The other end of the resistor is connected with the other end of the third contactor, the other end of the second contactor is connected with the anode, one end of the third contactor is connected with one end of the fourth contactor and connected with the cathode of the potentiostat, and the other end of the fourth contactor is connected with the pipeline. The cathode protection p