Energy-saving transformer with adjustable voltage tapping range

The utility model relates to the technical field of transformers, in particular to an energy-saving transformer with an adjustable voltage tapping range, which comprises a shell, a cover plate and a protective device, the cover plate is in bolted connection with the surface of the shell, the surface of the cover plate is fixedly connected with a first insulator, the upper surface of the cover plate is fixedly connected with a second insulator, the surface of the shell is fixedly connected with supporting legs, and the supporting legs are fixedly connected with the protective device. The protection device is arranged on the surface of the first insulator and comprises a connecting lantern ring, the connecting lantern ring is connected with the surface of the first insulator in a clamped mode, the surface of the connecting lantern ring is fixedly connected with a protection sleeve, the surface of the first insulator is fixedly connected with an assembling ring, the inner wall of the assembling ring is fixedly c