Common-box electronic type voltage transformer

The utility model relates to a common-box electronic type voltage transformer. The voltage transformer comprises shielding cases, middle shielding and support shielding; one end of each shielding case is closed, the other end of each shielding case is open, and the shielding cases are used to cover ball-shaped electrodes at ends of primary conductors and fronts of rod-shaped electrodes connected to the ball-shaped electrodes; two ends of the middle shielding are provided with openings for being disposed at the peripheries of the rod-shaped electrodes in a surrounding manner; and the support shielding is a porous plate. An end fracture position of each phase primary conductor is provided with the corresponding shielding case, so an original three-phase commonly-used large shielding space is changed into independent small phase shielding spaces, and requirements for internal electric field distribution are changed to be more rigorous. The end of each primary conductor is designed to have the ball-shaped electrode structure and guarantee certain radian cooperation with the corresponding shielding case, so requirements of insulating characteristic are met, the three-phase electric-field compatible effect is achieved, and running reliability and stability of the transformer are ensured.