Abstract: A rotary tap changer is connected to a power source to control voltage supplied from the power source to a load. The rotary tap changer includes a motor having an output device, and a drive sprocket having a drive shaft positioned perpendicularly to a plane of rotation of the drive sprocket. The rotary tap changer also includes a gear engaged by the drive shaft, a first set of movable contacts, and a transmission device. The first set of movable contacts is coupled to the gear and mounted to conductively engage taps of an electrical control device. The transmission device is coupled to the motor output device and to the drive sprocket such that the motor directly drives the first set of movable contacts for selecting an electrical control device tap.

Abstract: A rotary tap changer is connected to a power source to control voltage supplied from the power source to a load. The rotary tap changer includes a motor having an output device, and a drive sprocket having a drive shaft positioned perpendicularly to a plane of rotation of the drive sprocket. The rotary tap changer also includes a gear engaged by the drive shaft, a first set of movable contacts, and a transmission device. The first set of movable contacts is coupled to the gear and mounted to conductively engage taps of an electrical control device. The transmission device is coupled to the motor output device and to the drive sprocket such that the motor directly drives the first set of movable contacts for selecting an electrical control device tap.

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: A tamper-resistant transformer cabinet is provided, comprising: a tank including a front plate, for housing said transformer, said front plate including upper, lower and side edges, a riser extending from said front plate, said riser including two sides and a front, a cabinet door including a rear top edge, two rear side edges, two lower side edges, and a lower front edge, said door including along each of said edges a pair of 90.degree. bends that form a channel, said channel forming a tamper-resistant interface between said door and said tank.