Abstract: This transformer core and coil assembly comprises (a) a low voltage coil surrounding a coil window and including first and second coil legs on opposite sides of the coil window, (b) a first plurality of side-by-side amorphous-steel core loops surrounding one of the coil legs, and (c) a second plurality of side-by-side amorphous-steel core loops surrounding the other of the coil legs. Extending between said coil legs in a position between two of said side-by-side core loops in the first plurality and between two of said side-by-side loops in the second plurality is a brace of plate form and of electrical insulating material for blocking motion of said coil legs toward each other in response to coil-collapsing forces developed by short-circuit currents through the low voltage coil, thereby protecting the amorphous-steel core loops from damage by these short-circuit produced forces tending to collapse the coil.

Abstract: This dual voltage transformer comprises a primary winding having a tap at a location intermediate its length, a first termination for connection to line voltage, and a second termination for connection to ground. When the transformer is to be operated at a relatively high voltage, the first termination is connected through a dual voltage switch to line voltage; and when the transformer is to be operated at a relatively low voltage, the tap is connected through said switch to line voltage. First varistor means is connected across the primary winding between said first and second terminations both when the transformer is operated at high voltage and at low voltage; and second varistor means having a lower breakover voltage than the first varistor means is connected between said tap and ground when the transformer is operated at low voltage.

Abstract: An adapter for retaining a conductive rod within a high voltage bushing insulator is disclosed. The adapter is crimped onto parallel slots of the conductive rod and located within a cavity of the insulator. The crimped adapter prevents radial, axial, and angular movement of the conductive rod relative to the insulator.