The invention discloses a door opening automatic power-off device of a PT cabinet, and relates to the technical field of
electrical equipment safety. The door opening automatic power-off device comprises an electric cabinet box, wherein a lifting cabinet, a PT cabinet body and a metering cabinet are correspondingly arranged in an electric cabinet box from bottom to top, travel switches are fixedlyconnected to the inner side walls of the lifting cabinet, the PT cabinet body and the metering cabinet, the inner wall of the rear end of the metering cabinet is fixedly connected with a controller,and the
signal output end of the controller is electrically connected with the travel switches. According to the door opening automatic power-off device of the PT cabinet, the travel switches, the controller and a
circuit breaker are arranged, so that the advantages of automatic power-off and high safety are achieved; the travel switches are additionally arranged in the lifting cabinet, the PT cabinet body and the metering cabinet, and when the side door of any electric cabinet is opened, the travel switches are triggered, a
signal is fed back to the controller, the
signal is intercepted by the controller, and the
circuit breaker working normally is controlled to jump, so that the outage safety is guaranteed, and meanwhile, automatic outage is achieved, and the personal safety of operatorsis guaranteed.