H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/228
H01H 33/64 (2006.01) H01H 33/22 (2006.01)
Patent
CA 1087660
IMPROVED GAS-TYPE CIRCUIT-INTERRUPTERS HAVING ADMIXTURES OF HELIUM WITH SMALL CONCENTRATIONS OF SULFUR-HEXAFLUORIDE (SF6) GAS ABSTRACT OF THE DISCLOSURE An improved gas-type circuit-interrupter is pro- vided utilizing a mixture of helium and sulfur-hexafluoride (SF6) gases, with the percentage concentration of sulfur- hexafluoride (SF6) gas being 10%, or less, by volume. The improved gas-type circuit-interrupter of the present invention may be utilized to advantage as a "puffer- type" circuit-interrupter, in which relative movement between a piston and operating cylinder takes place for forcing the compressed gas to flow through a suitably-located orifice, or nozzle member, and into intimate engagement with the established arc disposed therein to effect its extinction. Another form of the gas-type circuit-interrupter of the present invention may include a pressurized gas- reservoir chamber containing the aforesaid admixture of the helium and sulfur-hexafluoride gases in the proper concentra- tion, that is 10%, or less, by volume, of sulfur-hexafluoride (SF6) gas with the remaining being made up substantially entirely of helium.
285419
Mcconnell And Fox
Westinghouse Electric Corporation
LandOfFree
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