Abstract: A pad for supporting a transformer is described, which comprises: a molded polymer body having front, rear, left and right surfaces, canted top surfaces, a sill adapted to engage a transformer cabinet door, and a pedestal to support and elevate a transformer tank. In one embodiment, the sill is formed integrally with the body, the sill being generally U-shaped, including a front section and left and right side sections and extending between about 0.5 and 6 inches above said top surface of the body. The pedestal may also be formed integrally with the body, the pedestal being generally rectangular in shape, incorporating transformer mounting flanges, and extending between about 0.5 and 6 inches above said top surface of said body.

Abstract: Molded insulating shell halves are secured together around a blowout coil, stationary and movable contacts to pivotally trap an armature assembly therebetween. Windows are provided in the shell halves to ventilate the electromagnet coil during operation. The electromagnet is removable through the window without disassembly of the contactor. Contact and armature adjustment is accomplished through additional window openings. An arc chute having left and right-hand arc extinguishing chambers each sub-divided into upper and front chambers splits the arc into four series segments and increases the overall length of the arc significantly over similar prior art devices.