Kit for a bushing arrangement for the electrical connection of a transformer installation through an opening in a housing wall of the transformer installation, the kit comprising - an elongated electrical conductor, wherein along the longitudinal extension of the conductor there is formed at least a first section which in the assembled state lies on the inside with respect to the housing wall and a second section (3") which in the assembled state lies on the outside with respect to the housing wall, and - at least one first insulating element which can be inserted into the opening of the housing wall and has an opening for at least partially receiving the conductor, the opening of the insulating element being set up for guiding the conductor from an outer side (2") of the housing wall to an inner side of the housing wall wherein the first section of the electrical conductor has a widening forming a stop surface for limiting a longitudinal displacement of the conductor through the opening of the first insulating element in the direction of the outside of the housing wall, wherein the second portion (3") of the electrical conductor has a threaded portion for receiving a screw nut for tightening the conductor against an outer side (2") of the housing wall, wherein the at least one first insulating element comprises at least one clamping element which can be brought from a first position projecting from the periphery of the at least one first insulating element into a second position approaching the periphery of the at least one first insulating element, wherein the at least one clamping element is arranged on the at least one first insulating element in such a way that, in the first position, it limits a displacement of the at least one first insulating element in the direction of the outside (2") of the housing wall in the installed state of the bushing arrangement. - an elongated electrical conductor, wherein along the longitudinal extension of the conductor there is formed at least a first section which in the assembled state lies on the inside with respect to the housing wall and a second section (3") which in the assembled state lies on the outside with respect to the housing wall, and - at least one first insulating element which can be inserted into the opening of the housing wall and has an opening for at least partially receiving the conductor, the opening of the insulating element being set up for guiding the conductor from an outer side (2") of the housing wall to an inner side of the housing wall wherein the first section of the electrical conductor has a widening forming a stop surface for limiting a longitudinal displacement of the conductor through the opening of the first insulating element in the direction of the outside of the housing wall, wherein the second portion (3") of the electrical conductor has a threaded portion for receiving a screw nut for tightening the conductor against an outer side (2") of the housing wall, wherein the at least one first insulating element comprises at least one clamping element which can be brought from a first position projecting from the periphery of the at least one first insulating element into a second position approaching the periphery of the at least one first insulating element, wherein the at least one clamping element is arranged on the at least one first insulating element in such a way that, in the first position, it limits a displacement of the at least one first insulating element in the direction of the outside (2") of the housing wall in the installed state of the bushing arrangement.