Patent ID: 7812266

Claim:
A bushing comprising: a rotationally symmetrical core surrounding an axial duct for accommodating a conductor; a grading insulation surrounding the axial duct; a plurality of conductor layers which are electrically insulated from each other, an innermost of the conductor layers being electrically conductively connected to a contact element arranged in the axial duct for establishing contact with the conductor; a shell having an insulating matrix material with, at a circumference, a test tap with a test contact electrically conductively connected to an outermost of the conductor layers of the grading insulation; a grounding contact electrically connectable to the test contact; a flange laterally projecting and circumferentially surrounding the shell, which flange has axial through holes for accommodating bolts for mounting the bushing, a first side of the flange being adjacent to a mounting side of the bushing, wherein the flange is in one piece with the shell and is formed at least in part of the insulating matrix material and at least one metal insert at least partially embedded in the insulating matrix material adjacent to the through holes such that the at least one metal insert forms at least part of a surface of the flange surrounding the through holes on a second side of the flange opposite the first side of the flange; and at least one electrically conductive connection element which connects the grounding contact with the at least one metal insert.