H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/118
H01H 85/02 (2006.01) H01H 9/10 (2006.01) H01H 9/34 (2006.01)
Patent
CA 1173477
P88-7652 IMPROVED ARC GAS CONTROL DEVICE FOR A POWER CLASS FUSE HAVING LOAD BREAK CONTACTS ABSTRACT OF THE DISCLOSURE A power class fuse comprises an insulative canister having a female load break contact at a closed end of the canister and a male load break contact, coupled electrically to a fuse element. The male load break contact is inserted into the canister for engagement with female load break contact to complete a circuit through the fuse element. An arc gas control device including a pair of speed parallel plates each having apertures formed therethrough and filter material sandwiched between the plates, is mounted on the male load break contact. The arc gas control device forms a partition in the canister upon insertion of the male load break contact thereinto. Arc gas generated upon engagement of the male and female load break contacts passes through the control device into the canister interior surrounding the fuse element to reduce back pressure in the canister, while metallic particles and other contaminants which could produce flashovers within the canister, are trapped in the filter material.
396647
Mcgraw-Edison Company
Shapiro Cohen
LandOfFree
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