Vacuum electrical switch

Details Vacuum electrical switch Vacuum electrical switch

1995-10-16

1999-01-19

Friedhofer, Michael A.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Vacuum

218 42, H01H 3366

Patent

active

058615970

ABSTRACT:
A vacuum switch has an elongated vacuum cartridge with a cylindrical enclosure blanked off by two end-plates, in which there are housed two arcing contacts respectively stationary and movable, and a coil designed to produce an axial magnetic field in the arc formation zone. The coil has one end arranged as a current conducting strip and an end electrically connected to one of the above-mentioned arcing contacts. The two ends of the coil are superposed and electrically connected, and a branch-off means, such as for example a magnetic circuit, is fitted between these two ends to branch off a part of the main current through the coil during breaking in order to create the axial magnetic field.

REFERENCES:
patent: 3366762 (1968-01-01), Smith, Jr.
patent: 3372258 (1968-03-01), Porter
patent: 3469050 (1969-09-01), Robinson et al.
patent: 4415787 (1983-11-01), Yamanaka
patent: 4661666 (1987-04-01), Sakuma et al.
patent: 4707577 (1987-11-01), Tamaki et al.
patent: 4975552 (1990-12-01), Niegl et al.
patent: 5280144 (1994-01-01), Bologeat-Mobleu et al.

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