Corona reducing apparatus for a submersible electrical fuse

Details Corona reducing apparatus for a submersible electrical fuse Corona reducing apparatus for a submersible electrical fuse

1977-03-02

1979-01-23

Yusko, Donald J.

Communications: electrical

Condition responsive indicating system

Specific condition

337224, 337241, G08B 2100, H01H 8532

Patent

active

041363396

ABSTRACT:
Semiconductive paint is applied to a narrow strip on the inside surface of an insulating enclosure for a submersible fuse. The enclosure is generally watertight. The semiconducting paint marginally overlaps two isolated regions of electrically conducting paint. The combination of the conducting paint and semiconducting paint covers the entire inner surface of the enclosure and acts cooperatively to prevent or reduce corona therein. At the place of overlap, rounded ridges are provided for shielding the relatively sharp interface corner of the conductive paint on the inside surface of the electrically insulating material to reduce the corona at that relatively critical point. A flowable rubber gasket is provided for insertion between two separable portions of the enclosure. The gasket not only provides watertight sealing for the enclosure when completely assembled but has a bead on the inside surface thereof which shields the corners of the two portions of the enclosure to reduce the corona effects thereat.

REFERENCES:
patent: 2036223 (1936-04-01), Lapple
patent: 2593426 (1952-04-01), Fahnoe
patent: 2735088 (1953-02-01), Kinzer
patent: 3229065 (1966-01-01), Borys
patent: 3513427 (1970-05-01), Prosser et al.
patent: 3524178 (1970-08-01), Stratton
patent: 3684995 (1972-08-01), Horton
patent: 3686603 (1972-08-01), Lockie et al.
patent: 3946351 (1976-03-01), Bronikowski et al.
patent: 3970932 (1976-07-01), Harvey
patent: 4035755 (1977-07-01), Cameron

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