Patent ID: 7750257
Filing Date: 2010-07-06
Classification: H01H

Abstract:
1. A load tap changer connected to a power source to control voltage supplied from the power source to a load, the load tap changer comprising: 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; 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; and a cover assembly that includes a cover element onto which a motor that rotates the movable element relative to the base assembly is mounted, wherein the base element and the cover element are made of molded polymer, and the base element includes a hole into which the movable element fits to allow rotation of the movable element relative to the base assembly.