PE line protection system for power utilization and charging apparatus, and power utilization and charging apparatus

A PE line protection system for a power utilization and charging apparatus comprising a driving circuit and a switch, wherein:

• an input end of the driving circuit is connected to an output end of the power utilization and charging apparatus, a driving end of the driving circuit is connected to a control end of the switch, a first end of the switch is connected to an output end of the PE line, and a second end of the switch is connected to an input end of the PE line;
• and
• the driving circuit comprises a controllable switch module and a freewheeling circuit, wherein:
• a control end of the controllable switch module is connected to the output end of the power utilization and charging apparatus, a first end of the controllable switch module is connected to a first control end of the switch and an input end of the freewheeling circuit respectively, a second end of the controllable switch module is grounded, an output end of the freewheeling circuit is connected to a second control end of the switch, and a common end is connected to a power supply;
• the driving circuit controls the controllable switch module so as to turn off the controllable switch module upon reception of a signal transmitted by the power utilization and charging apparatus indicating the abnormal connection of the PE line, wherein when the controllable switch module is turned off the switch is de-energized such that the switch cuts off the PE line;
• and
• the freewheeling circuit releases electric energy stored by the switch after the switch is de-energized, so as to avoid damaging the controllable switch module.