Alarm device and alarm method for power equipment

The invention relates to the technical field of alarm devices, in particular to an alarm device and an alarm method for power equipment. A protective fence is installed outside the transformer, a rotating door is installed on the front side of the protective fence and divides the front side of the protective fence into a first fence body and a second fence body, a vertical sliding groove is formed in the first end of the rotating door, a locking plate is installed in the vertical sliding groove, and the rotating door is locked with the first fence body through the locking plate. The second end of the revolving door is rotationally connected with the second fence; the first fence is provided with a first sensing module for detecting whether the rotating door is closed or not, the second fence is provided with a second sensing module, and the transformer is provided with a third sensing module for detecting whether the transformer door is closed or not. According to the invention, all conditions needing to be a