Contactor control apparatus and power supply system

A control apparatus, comprising:

• an electrical signal detection circuit;
• a control circuit;
• a contactor circuit;
• a first execution circuit;
• a protection circuit;
• and
• a second execution circuit;
• wherein the electrical signal detection circuit is configured to:
• detect an electrical signal on a loop, and send the electrical signal to the control circuit;
• wherein the control circuit is configured to:
• generate a control signal based on the electrical signal received from the electrical signal detection circuit, and send the control signal to the first execution circuit;
• wherein the contactor circuit is connected to the loop;
• wherein the first execution circuit is configured to control the contactor circuit to be closed or opened based on the control signal received from the control circuit, wherein in response to the contactor circuit being closed, the loop is connected, and in response to the contactor circuit being opened, the loop is disconnected;
• wherein the protection circuit is configured to:
• detect a current value on the loop in response to the contactor circuit being closed, and send an opening instruction to the second execution circuit in response to the current value reaching a trip threshold;
• wherein the second execution circuit is configured to open the contactor circuit in response to receiving the opening instruction from the protection circuit;
• wherein the second execution circuit comprises a first diode, a second diode, a third switch tube, a capacitor, a first switch, and a second switch;
• wherein an anode of the first diode is connected to a positive electrode of a power supply of the contactor circuit, and a cathode of the first diode is connected to a first terminal of the capacitor;
• wherein an anode of the second diode is connected to a second terminal of the capacitor, and a cathode of the second diode is connected to a negative electrode of the power supply of the contactor circuit;
• wherein an anode of the third diode is connected to the second terminal of the capacitor, and a cathode of the third diode is connected to the protection circuit;
• wherein the first switch is connected between the first terminal of the capacitor and a negative wiring terminal of the contactor circuit;
• and
• wherein the second switch is connected between the second terminal of the capacitor and a positive wiring terminal of the contactor circuit.