Circuit breaker arc chute having components of refractory...

Details Circuit breaker arc chute having components of refractory... Circuit breaker arc chute having components of refractory...

H - Electricity

01

H

306/246

H01H 33/04 (2006.01) H01H 9/34 (2006.01)

Patent

CA 1053301

ABSTRACT OF THE DISCLOSURE This arc chute comprises an arc-confining portion of an electric insulating material comprising the heat and pressure reacted thermoset product of a mixture of chrysotile asbestos, orthophospheric acid, and silica sand. The silica sand is present in the mixture in an amount of between 23.5 and 30.5 percent by weight of the mixture. The insulating material prior to operation of the arc chute has a surface material at said surface to an amorphous fused material, the major proportion of which is silica.

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