A sight glass for mounting in a hole, provided with radially inwardly extending protrusions, in a sheet material wall of a housing, for example a switchgear housing, includes: a body with a mounting surface and a cylindrical wall arranged on the mounting surface and extending perpendicularly from the mounting surface; a plurality of L-shaped slots in the radially outer surface of the cylindrical wall; and a gasket arranged on the mounting surface, the gasket enclosing the cylindrical wall. The body and cylindrical wall are of a monolithic transparent material.

A bridge joint cover assembly for a busway bridge joint, the assembly comprising a bridge joint cover plate having a cover plate hole, a viewing plate fixed to the cover plate, over the cover plate hole, and the viewing plate including infrared (IR) material. The IR material is further aligned with the cover plate hole in the bridge joint cover plate.

A circuit interrupter having a status indicator providing a current status of the circuit interrupter, the status indicator presenting one of: an On state, an Off state or a Fault state. The status indication is provided as a visual status and is color coded to one of the three circuit interrupter states. The circuit interrupter further including, in one configuration, a rocker actuator that rotates about an axis and the status indication mechanism is coupled to the rocker actuator.

An assembly for use in an electrical power distribution system includes a housing that includes an interior space; an electrical apparatus in the interior space, the electrical apparatus including an electrical connection mechanism that is configured to move between at least two positions; an observation port through the housing, the observation port being configured to allow visual observation of the electrical connection mechanism in the interior space from an exterior of the housing; and an optical guide between the interior space and a light source. The light source is outside of the interior space and the optical guide is configured to deliver light from the light source to the interior space when the light source emits light.

A removable electric current switching element includes first and second housing parts fitted to the other and that can be moved between an assembled configuration and a partially disassembled configuration. The first housing part includes side walls provided with through inspection windows, the second housing part includes insulating walls which each delimit a volume in the second housing part around a corresponding mobile conductor. The first and second housing parts are arranged relative to one another in such a way that, in the assembled configuration the insulating walls mask the inspection windows and that, in the intermediate configuration the insulating walls are away from the inspection windows to free access to the inspection windows.

A bridge joint cover assembly for a busway bridge joint, the assembly comprising a bridge joint cover plate having a cover plate hole, a viewing plate fixed to the cover plate, over the cover plate hole, and the viewing plate including infrared (IR) material. The IR material is further aligned with the cover plate hole in the bridge joint cover plate.

An apparatus is disclosed comprising an interrupter and a first internal contact disposed within the interrupter; wherein an external terminal of the interrupter is configured for serving as a terminal in a switching mechanism; and wherein the first internal contact and the external terminal form opposite ends of a unitary conductive bar.

An apparatus is disclosed comprising a vacuum interrupter; an upper insulating shield forming part of a support structure to mechanically support the vacuum interrupter in a mounted position; a top portion of the vacuum interrupter seated in the upper insulating shield; a first lower insulating shield forming part of the support structure to mechanically support the vacuum interrupter in a mounted position; and a lower portion of the vacuum interrupter seated in the first lower insulating shield, wherein the upper insulating shield and the lower insulating shield are mechanically coupled with one another independent of the vacuum interrupter.

In accordance with certain embodiments, an improved switching mechanism and related components are provided.

In accordance with certain embodiments, an improved switching mechanism and related components are provided.