H - Electricity – 01 – H
Patent
H - Electricity
01
H
337/98, 339/47.2
H01H 31/00 (2006.01)
Patent
CA 1258505
ABSTRACT An insulating support column is provided for driving interrupting units and includes an insulator having a longitudinal bore extending therethrough, a trans- lational operating member extending through and outside of both ends of the insu- lator, and sealing arrangements between the operating member and the insulator to retain insulating material within the insulator and to seal the bore from the external environment. The insulating support column is disposed substantially vertically during operation to drive the interrupting unit. The operating member includes a first portion of insulative material and metallic portions that are affixed at each end of the first portion. The lower metallic end portion of the operating member includes a connector that is driven by a power train and the upper metallic end portion includes a connector that is connected to drive an interrupting unit. An end fitting is affixed to each end of the insulator. Each of the end fittings includes a central bore and a sealing arrangement within the bore. The upper sealing arrange- ment operates with respect to the first, insulative portion of the operating member and the lower sealing arrangement operates with respect to the lower metallic portion. The lower sealing arrangement is arranged with respect to the mounting surface such that the lower metallic end portion of the operating member does not extend into the insulator beyond the end fitting. The dielectric withstand capability of the insulating support column is not reduced by the presence of the operating member for any position of the operating member along its translational path. Accordingly, if excessive voltage should cause an electrical discharge to occur between the end fittings of the insulator, the flashover will take place external to the insulator.
512202
Chabala Leonard V.
Roman Christopher D.
Osler Hoskin & Harcourt Llp
S&c Electric Company
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