A switchgear assembly includes a vacuum interrupter assembly having an
internal switching contact. A conductive current exchange is in electrical
contact with the switching contact, and the current exchange defines an
internal chamber within the current exchange. A plug of non-conductive,
compliant material has a first portion that extends into the internal
chamber in contact with the current exchange. An insulative encapsulation
surrounds the vacuum interrupter assembly, the current exchange, and the
plug.