Locking device between transformer and high-voltage chamber

The locking device comprises a high-voltage electric appliance chamber and a transformer chamber which are arranged in a main transformer substation, mechanical program locks are installed on a high-voltage electric appliance chamber main switch and a transformer chamber safety door, and opening and closing states of the high-voltage electric appliance chamber main switch control opening and closing operation of the mechanical program locks in a linkage mode. A crosspiece is installed on the upper portion of the transformer chamber, a limiting block is arranged on the crosspiece, and a limiting groove is formed in the bottom of the limiting block. The transformer room safety door comprises a first door body and a second door body, a mechanical program lock is installed on the first door body, a telescopic bolt is installed on the second door body, a control block is arranged in the middle of the bolt, a rotating plate is arranged at the top end of the bolt, and the control block can be matched with the mechan