Implementation of a high voltage device

A leadthrough for guiding a current conductor (K) into a high voltage device, especially a transformer, in an insulated manner, has a cylindrical insulating housing (1) for receiving the current conductor (K), a leadthrough flange (3) for fixing the leadthrough to a high voltage device and a current and/or voltage sensor (7, 8). Said current and/or voltage sensor (7, 8) is located on a part of the leadthrough that is situated outside of the high voltage device in its assembled state. As a result, the construction is largely independent of the type and form of the transformer.