Vacuum switch provided with horseshoe-shaped elements for genera

Details Vacuum switch provided with horseshoe-shaped elements for genera Vacuum switch provided with horseshoe-shaped elements for genera

1985-03-18

1987-01-13

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 3366

Patent

active

046366008

ABSTRACT:
An electrical vacuum switch is provided with two mutually movable contacts of conductive material, mounted on the ends of a fixed or movable contact rod, with a laminated horseshoe-shaped ferromagnetic element being fitted around each contact rod. The magnetic circuit around the contact rod consists of a section of low magnetic resistance and a section of a high magnetic resistance. The circular base of the U-shaped inner cavity of the horseshoe-shaped element is adjacent to the associated contact rod and the elements are offset through 180.degree. C. with respect to each other, so that the internal magnetic fields generated in the horseshoe-shaped elements when current passes through the switch, to the extent that the section with high magnetic resistance is approached, are mainly oriented axially between the two horseshoe-shaped elements. The elements are so designed that their magnetic resistance to the internal magnetic field increases in going from the U-shaped base section to the section with high magnetic resistance.

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