Electromagnetic arc extinction apparatus for switchgear

Details Electromagnetic arc extinction apparatus for switchgear Electromagnetic arc extinction apparatus for switchgear

1979-01-19

1981-10-13

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200144R, H01H 3306

Patent

active

042950210

ABSTRACT:
An electromagnetic arc extinction apparatus for switchgear comprises an arc chamber made of an electrically insulating material and having an axial channel. There are two electrodes arranged in axial relationship to the axis of the arc chamber and adapted to form a quenching arc having a helix-like shape. To provide for its movement in a radial direction, the quenching arc has the form of a helix whose pitch is at least 10 times lesser than the diameter of the arc chamber measured over its cross-section. In the apparatus of the invention, the helix of the quenching arc has a small pitch with the result that the associated switchgear offers small overall dimensions and can handle high voltages.

REFERENCES:
patent: 2051478 (1936-08-01), Hampton et al.
patent: 2446027 (1948-07-01), Scott, Jr.
patent: 2648744 (1953-08-01), Strom et al.

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