Surge arrester with improved insulative bracket

Details Surge arrester with improved insulative bracket Surge arrester with improved insulative bracket

1989-07-24

1990-11-20

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361127, 361132, 174166R, 174211, 174212, H02H 100

Patent

active

049722913

ABSTRACT:
The insulative support bracket of a surge arrester includes a concentric annular concavity formed at one or both ends of a bolt hole. A washer, when pressed concentrically to the concavity, contacts the insulative bracket only, at least initially, at surfaces adjacent the outer diameter of the washer. An annular convexity, surrounding the concavity, will mate with the central portion of an external tooth lockwasher to prevent the full penetration of the teeth of the lockwasher into the insulative bracket. The ability of the insulative bracket to withstand the mechanical forces tansmitted to the insulative bracket by the washers is thereby enhanced. The concavity may be formed either in a surface of the insulative bracket or in a surface of the washer.

REFERENCES:
patent: 1328720 (1920-01-01), Connell
patent: 1720181 (1929-07-01), Kyle
patent: 2625581 (1953-01-01), Jenner et al.
patent: 4851955 (1989-07-01), Doone et al.
Ohio Brass, Catalog 94, DynaVar PDV-65 and PDV-100, Distribution Class Surge Arresters, 1988.
Mounting Instructions, Ohio Brass, PDV Arresters, 1988.

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