Electrical contact structure of a vacuum interrupter

Details Electrical contact structure of a vacuum interrupter Electrical contact structure of a vacuum interrupter

1982-09-29

1985-10-15

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200262, 200267, 200268, 200269, H01H 3366

Patent

active

045476403

ABSTRACT:
An electrical contact structure of a vacuum interrupter wherein a pair of electrical contacts 2 are provided within a vacuum vessel 1 through a pair of contact rods 14 so that one is in contact with the other or away therefrom. The electrical contact 2 comprises a substantially disk-shaped contact body 2b made of high electric conducting metal portions and metallic pipes having a low electric conductivity, and a plurality of major current flowing sections 22 made of metal having a high electric conductivity, penetrated in the contact body 2b in a manner to be penetrated in the direction of the thickness of the contact body 2b and separated from each other. As an alternative form, the electrical contact 2 may comprise a substantially disk-shaped contact body 2b of ceramic pipes 21 having a low electric conductivity and a plurality of penetrating portions (21a, 21d) wherein each portion (21a, 21d) along the inner and outer periphery of which a chromium oxide film 21b, 21c is formed, is filled with copper to form a plurality of major current flowing portions 22. As a further alternative form, the electrical contact 2 may comprise a substantially disk-shaped contact body 2b of ceramic pipes 21 having a low electric conductivity and a plurality of penetrating portions 21a, 21d and a plurality of major current flowing portions 22a formed by filling copper containing a chromium oxide material of about 0.1% to 0.6% by weight.

REFERENCES:
patent: 3327081 (1967-06-01), Pflanz
patent: 3592987 (1971-07-01), Lempert et al.
patent: 3614361 (1971-10-01), Weston
patent: 3852879 (1974-12-01), Krock et al.
patent: 3946179 (1976-03-01), Murano et al.
patent: 4324960 (1982-04-01), Aoki et al.

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