Electric switch gear with improved stationary contact configurat

Details Electric switch gear with improved stationary contact configurat Electric switch gear with improved stationary contact configurat

1991-12-18

1994-05-17

Recla, Henry J.

Electricity: circuit makers and breakers

Electric switch details

Contact

200144R, 200400, 200147R, H01H 106

Patent

active

053130316

ABSTRACT:
A switch is configured that: in the closed-circuit state, at least part of its movable contact arm enters into a oblong generally hexahedral space defined by its elongated stationary conductor in its closed circuit position. Both contacting and breaking of the moving contact and the fixed contact occur in the space. Overall electromagnetic forces generated by the current flowing through the stationary conductor, movable contact arm and the arc induced at the time of breaking effectively act to extend the arc toward a terminal section of the stationary conductor and to increase the arc resistance at the time just after the breaking of both the contacts.

REFERENCES:
patent: 1958159 (1934-05-01), Bresson
patent: 2944129 (1960-07-01), Cole et al.
patent: 4491705 (1985-01-01), Hayashi et al.
patent: 4642428 (1987-02-01), Yoshiyasu et al.
patent: 4689588 (1987-08-01), Murata et al.
patent: 4835501 (1989-05-01), Hovanic
patent: 5142111 (1992-08-01), Blanchard et al.

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