H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/238
H01H 33/68 (2006.01) H01H 33/92 (2006.01)
Patent
CA 1064084
OIL CIRCUIT-BREAKER PUMP- ASSEMBLY WITH IMPROVED SHUNTING CONTACT STRUCTURE ABSTRACT OF THE DISCLOSURE An improved oil-pumping piston-assembly is provided for an oil-type circuit-interrupter to improve the interrupt performance during low-current conditions, having an improved hydraulic-dashpot action occurring during charging and dis- charging oil, incorporating, additionally, a "floating" piston design, and reducing the mechanical impulse forces exerted on the cylinder when high-current interruptions are made with improved check-valve construction. The improved oil-pumping piston-assembly of the present invention is particularly adapted for the inclusion therewith of an auxiliary shunting separable-contact structure, which will, when desired, increase the current carrying capabil- ity of the circuit-interrupter. Its inclusion or exclusion is optional, depending upon the current rating desired by the utility customer. Also, the improved oil-pumping piston-assembly pro- vides an improved check valve construction, which will admit clean oil into the pumping cylinder from the clean-oil region externally of the grid structure, by an improved check-valve structure located at a position between the pumping-cylinder reservoir and the lower end of the pumping housing, through which oil inlet passages are provided for the entrance of such clean oil into the pumping cylinder.
257072
Bohinc Richard J.
Racki Francis R.
Tragesser Charles W.
Vaill Ronald E.
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