The present invention provides a safety device for cutting off high voltage for a hybrid electric vehicle, which cuts off the connection between an interlock pin and a battery management system to cut off the current flow after electric power is supplied from a high voltage battery, thus preventing the occurrence of arc when an external connected is disconnected. The electrical system includes a switchgear enclosure, a number of electrical switching apparatus, and a racking mechanism movably coupling the electrical switching apparatus to the enclosure. Curved contact surfaces are provided on the rocker members and on the link plate openings, along which curved surfaces of the rocker members and link plates bear against each other to transmit force. Different locking and versioning mechanisms can be used with different transaction groups. In addition, a bonding pad is also attached to the top and bottom surface of the conductive rod respectively.