Practical low residual voltage and full voltage monitoring device

The utility model discloses a practical low residual voltage and full voltage monitoring device, and relates to the technical field of voltage monitoring. The device comprises a voltage line device, a supporting device, a rotating device and a monitoring display device, the lower surface in the upper end of the voltage line device is fixedly connected with the supporting device and the rotating device, the supporting device and the rotating device are matched in position, and the upper end of the supporting device is in sliding fit with the monitoring display device. The voltage line device comprises a protection box and sliding rails, the sliding rails are fixedly connected to the surfaces of the two opposite sides in the protection box, the supporting device comprises a support and a sliding groove, the upper surface of the support is fixedly connected with the sliding groove, and the rotating device comprises a first connecting rod and a movable rotating shaft. The monitoring display device comprises a sli