Abstract: A load tap changer connected to a power source to control voltage supplied from the power source to a load includes a base assembly that includes a base element onto which multiple stationary contacts that connect to taps of a winding of an electrical control device are mounted. The load tap changer also includes a movable assembly that includes a movable element that rotates to connect at least one pair of movable contacts mounted on the movable element to a stationary contact to select a corresponding tap. The load tap changer also includes a cover assembly that includes a cover element onto which a motor that rotates the movable element relative to the base assembly is mounted.

Abstract: An electrical apparatus includes at least one conductor and an insulation paper surrounding at least part of the conductor. The insulation paper includes a wood pulp fiber, a synthetic fiber, and a binder material. The synthetic fiber is present at between approximately 2 and 25 weight percent.

Abstract: A transformer includes a core defining a core window, a first coil surrounding a portion of the core and including a portion located within the core window, a second coil surrounding a portion of the core and including a portion located within the core window, and a polymer barrier insulation member that is located at least partially within the core window and positioned between the first coil and the second coil.

Abstract: A transformer includes a core defining a core window, a first coil surrounding a portion of the core and including a portion located within the core window, a second coil surrounding a portion of the core and including a portion located within the core window, and a polymer barrier insulation member that is located at least partially within the core window and positioned between the first coil and the second coil.

Abstract: A transformer includes a tank having a side wall, a core defining a core window, and a pair of coils, each of which surrounds a portion of the core and includes a portion passing through the core window. The transformer further includes a core and coil support member that extends through the core window to support the core and coils. The core and coil support member includes an upper flange and a lower flange, each flange having a channel formed along an outer surface of the flange that conforms in shape to an inner surface of the core. The core and coil support member includes a web that extends between and connects the upper and lower flanges, the web including first and second ends that extend out from the flanges. The transformer includes a support bracket that attaches to the side wall of the tank, and centers and supports the core and coil support member. The support bracket includes three sides that define a channel through which an end of the core and coil member extends.

Abstract: A tank for an oil-filled, pad-mounted electrical transformer includes six sides. The tank includes a front plate and a side panel unit connected to the front plate. The side panel unit is formed of a bent sheet of metal. Two of the side panels form obtuse included angles with adjoining side panels. A floor plate of the tank is sized to fit inside of the side panel unit so as to be capable of being secured at any desired elevation. The floor plate includes reinforcing channels.