Abstract:The National Standard GB51348-2019 stipulates that terminal circuit protection devices with current limiting electrical fire protection should be installed in storage warehouses, electric vehicle charging stations, and other locations. The electrical fire current limiting protection devices can effectively overcome the drawbacks of traditional circuit breakers, air switches, and monitoring equipment, such as large short-circuit currents, long time required to interrupt short-circuit currents, large arcs and sparks generated during short-circuits, and short service life. When a short-circuit fault occurs, these devices can rapidly limit the short-circuit current at the microsecond level to achieve arc extinguishing protection, significantly reducing electrical fire accidents and ensuring the safety of personnel and property in the usage locations.

Keywords:Electric vehicle charging stations; AC charging stations; Slow charging stations; Short-circuit protection; Overload protection; Electrical fire prevention