Switch contacts with improved fault-closing capability

Details Switch contacts with improved fault-closing capability Switch contacts with improved fault-closing capability

1988-09-12

1991-05-07

Macon, Robert S.

Electricity: circuit makers and breakers

Electric switch details

Contact

200252, 200253, 200144R, 200146R, H01H 142, H01H 160

Patent

active

050138766

ABSTRACT:
A contact arrangement is provided for a medium- or high-voltage switch including two contact surfaces that are generally parallel and relatively movable via a predetermined path between open and closed positions. During closing, the two contact surfaces define predetermined areas of relative engagement between the two contact surfaces. The movement along the predetermined path during contact engagement generally defines a first direction. The two contact surfaces are arranged relative to each other and the first direction such that, during closing, the relative engagement between the two contact surfaces defines a locus along each contact surface that is non-parallel to the first direction.

REFERENCES:
patent: 2830144 (1958-04-01), Fjellstedt
patent: 3174004 (1965-03-01), Stene et al.
patent: 3361879 (1968-01-01), Booth
Re: Porter publication, Sep. 1960, H. K. Porter Co., 2 pages.
Morris Catalogue No. 35, "V Range Minor Disconnectors," 4 pgs.
Delta Star Brochure EL-2117, "Type MK-40A . . . Disconnect," p. 8, and front and back covers, undated.
Delta-Star Catalog 1-012, "MK-40A . . . Disconnect Switch," front cover and p. 4, undated.
Delta-Star Catalog 1-013, "Vertical Break Air Switches," front cover and pp. 6 and 7, Revised 5-79.

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