Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1974-11-22
1976-09-28
Tolin, Gerald P.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148BV, 174 31R, H01H 3382
Patent
active
039833461
ABSTRACT:
The gas-filled bushing of a two-pressure circuit breaker has a hollow central conductive stud. Heated gas is injected into the annular chamber between the stud and the porcelain jacket of the insulator at the insulator flange, and the chamber is isolated from the interior of the circuit breaker housing. This gas flows up to the top of the bushing and into the open center of the conductive stud, and down into the low-pressure housing of the circuit breaker. A gas orifice restricts the flow of gas into the bushing to a small value and a compressor maintains a given pressure differential between the low-pressure gas and its high-pressure source. The heated gas maintains the gas in the bushing and in the housing at a temperature greater than -40.degree.F.
REFERENCES:
patent: 3045086 (1962-07-01), Leeds et al.
patent: 3566001 (1971-02-01), McCloud
patent: 3885114 (1975-05-01), Guaglione et al.
patent: 3889083 (1975-06-01), Guaglione et al.
patent: 3889084 (1975-06-01), Kucharski
patent: 3903388 (1975-09-01), McConnell
I-T-E Imperial Corporation
Tolin Gerald P.
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