Circuit breaker and power supply system

A power supply system, comprising:

• power supply, circuit breaker and electrical equipment, wherein the circuit breaker is connected between the power supply and the electrical equipment, and,
• the circuit breaker, comprising a mechanical switch circuit, wherein the mechanical switch circuit comprises:
• a busbar;
• a power module, comprising a movable contact and a stationary contact, wherein the stationary contact is electrically connected to the busbar, the movable contact is movable,
• when the movable contact is connected to the stationary contact, the mechanical switch circuit is connected, and
• when the movable contact is disconnected from the stationary contact, the mechanical switch circuit is disconnected;
• and
• a drive module, comprising a switch circuit, a movable coil, and a stationary coil, wherein the movable coil and the stationary coil are disposed adjacently to form a single coil pair, the switch circuit is configured to control a current direction of the movable coil and a current direction of the stationary coil, and the movable coil and the stationary coil attract each other when the current direction of the movable coil is aligned with the current direction of the stationary coil, and repel each other when the current direction of the movable coil is opposite to the current direction of the stationary coil, to enable the movable coil to drive the movable contact to be connected to or disconnected from the stationary contact.