H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/215
H01H 33/66 (2006.01) H01H 33/664 (2006.01) H01H 33/18 (2006.01)
Patent
CA 1255725
ABSTRACT Electrical vacuum switch 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°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. Said 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.
476818
Eaton Electric N.v.
Ridout & Maybee Llp
LandOfFree
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