Low voltage vacuum switch with plural conic shields about...

Details Low voltage vacuum switch with plural conic shields about... Low voltage vacuum switch with plural conic shields about...

H - Electricity

01

H

306/217

H01H 33/66 (2006.01) H01H 33/662 (2006.01)

Patent

CA 1118474

12 48,270 ABSTRACT OF THE DISCLOSURE An improved low voltage vacuum switch is de- tailed which is operable to interrupt high D.C. continuous currents at voltages below the arc potential. An improved arc shield is provided which ensures that the switch can withstand significant D.C. overvoltages across the con- tacts when the switch is in the open position, even after repeated switch operation. The arc shield means comprises spaced-apart generally conic shield extending in parallel relationship from opposed ends of the switch with substan- tial overlap of the conic shields. These conic shields are disposed at an angle relative to the switch axis and minimize the chance for vaporized contact material to reach and condense upon the switch insulator body portion.

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