A housing assembly for a network transformer primary disconnect assembly is provided. The housing assembly includes a visible break assembly and a number of sidewalls defining an enclosed space. The visible break assembly includes a number of viewing windows in at least one sidewall. The viewing windows are aligned with one of a contact assembly interface or a movable contact assembly distal end in the open, first position.

A housing assembly for a network transformer primary disconnect assembly is provided. The housing assembly includes a visible break assembly and a number of sidewalls defining an enclosed space. The visible break assembly includes a number of viewing windows in at least one sidewall. The viewing windows are aligned with one of a contact assembly interface or a movable contact assembly distal end in the open, first position.

A test apparatus that is usable with a switchgear cabinet is structured to mimic the operation of a circuit interruption device being received in the interior of the switchgear cabinet by providing a number of structures such as an engagement wall that engages a shutter assembly and moves it from a deployed state to an undeployed state. The engagement wall in the test apparatus has a number of openings formed therein that permit a number of electrical conductors and the relevant portions of the shutter assembly to be viewed from the exterior of the switchgear cabinet.

A test apparatus that is usable with a switchgear cabinet is structured to mimic the operation of a circuit interruption device being received in the interior of the switchgear cabinet by providing a number of structures such as an engagement wall that engages a shutter assembly and moves it from a deployed state to an undeployed state. The engagement wall in the test apparatus has a number of openings formed therein that permit a number of electrical conductors and the relevant portions of the shutter assembly to be viewed from the exterior of the switchgear cabinet.

Methods, systems, devices for a motorized isolation switch including a switch enclosure with a set of fixed insulated floating input line connectors and output load connectors movably fixed to the rear panel, a removable contactor bucket insertable into the isolation switch enclosure with mating movable insulated line terminals and load terminals and a set of insulated circuit interrupters, a motorized rack and pinion assembly connected to a base of the switch enclosure, coupled for moving a contactor pan connectable to the contactor bucket along a stationary rack gear along the base of the switch enclosure between and switch open position and a switch closed position, an insulating grounding block with ground connectors, the contactor bucket with corresponding movable ground terminals to mate with the insulated ground connectors in the switch open position, and ancillary controls for communicating with remotely located controls to electrically control the operation.

Methods, systems, devices for a motorized isolation switch including a switch enclosure with a set of fixed insulated floating input line connectors and output load connectors movably fixed to the rear panel, a removable contactor bucket insertable into the isolation switch enclosure with mating movable insulated line terminals and load terminals and a set of insulated circuit interrupters, a motorized rack and pinion assembly connected to a base of the switch enclosure, coupled for moving a contactor pan connectable to the contactor bucket along a stationary rack gear along the base of the switch enclosure between and switch open position and a switch closed position, an insulating grounding block with ground connectors, the contactor bucket with corresponding movable ground terminals to mate with the insulated ground connectors in the switch open position, and ancillary controls for communicating with remotely located controls to electrically control the operation.

A modular skid frame and device to reduce the potential for harm and injury from arc flashes. The modular skid frame comprises a plurality of frame members secured together to form the skid frame, and one or more hook members formed on one or more of the frame members to permit the receipt of a bucket or blade from a loader, scoop tram or other construction or mining equipment into the bowl portion and behind the bill portion of the hook member to facilitate the lifting and moving of the skid frame. Also disclosed is a device for racking a circuit breaker into and out of a circuit breaker cradle. The device comprises an actuator operatively connected to the circuit breaker cradle to permit the circuit breaker to be racked into and out of the cradle without direct or indirect contact on the part of an operator.

A modular skid frame and device to reduce the potential for harm and injury from arc flashes. The modular skid frame comprises a plurality of frame members secured together to form the skid frame, and one or more hook members formed on one or more of the frame members to permit the receipt of a bucket or blade from a loader, scoop tram or other construction or mining equipment into the bowl portion and behind the bill portion of the hook member to facilitate the lifting and moving of the skid frame. Also disclosed is a device for racking a circuit breaker into and out of a circuit breaker cradle. The device comprises an actuator operatively connected to the circuit breaker cradle to permit the circuit breaker to be racked into and out of the cradle without direct or indirect contact on the part of an operator.

A draw out circuit breaker has a reduced partial discharge in insulation surrounding a primary stab bus. A circular disk plate on one end of the bus includes tapped inserts located at a radial separation distance from the bus. An insulator sleeve surrounding the bus is formed to encapsulate the tapped inserts. Raised embosses on the circular disk plate separate the end portion of the insulator sleeve by a gap distance from the inward facing surface of the disk plate. The increased gap distance reduces formation of a triple point region between the surface of the disk plate and the insulator sleeve, thereby reducing occurrence of partial discharges in the insulator sleeve near the gap.