Universal relay adapter for substation

The invention discloses a universal relay adapter for a substation. The universal relay adapter comprises a base and a connecting part, wherein inserting holes which are electrically connected with leads on the back plate of a terminal box are formed in the base; inserting pieces which are electrically connected with a relay are arranged on the connecting part; the inserting pieces are inserted into the inserting holes, so that the leads on the back plate of the terminal box are electrically connected with the relay. After the inserting pieces on the connecting parts are inserted into the inserting holes in the base, the relay can be electrically connected with the back plate of the terminal box; when the relay is replaced, only the connecting part needs to be pulled out from the base, the relay can be detached down from the connecting part, then a new relay is mounted, and finally the connecting part is reinserted into the base. Obviously, when the relay is replaced, the power does not need to be turned off, the leads in a control loop do not need to be disassembled either, and the operation is simple, short in time and safe and reliable.