US3889083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas circuit breaker insulating tube support and high pressure vessel
Assignee: ABB Inc USA
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Filing: 1973-09-19
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Granted: 1975-06-10
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Expires: 1993-09-19
Abstract
Abstract A two-pressure dead tank high voltage circuit breaker contains a plurality of series-connected circuit interrupters mounted within a grounded tank filled with sulfur hexafluoride at relatively low pressure. The interrupters are supported from the bottom of the tank by hollow insulation support tubes which are terminated with a blast valve assembly which in turn supports the interrupters. The insulation tubes serve the function of a pressure vessel to store relatively high pressure gas to eliminate the need for a separate pressure vessel and as a support for the blast valve assembly and also provide the necessary insulation between the interrupters and ground.
Inventors
- 👤 Giovanni Paolo Guaglione
- 👤 James R Mccloud
- 👤 Hansruedi Aumayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:01
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56; H01H33/562
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
240 words
A dead tank circuit breaker comprising, in combination: a generally flattened spherical metallic tank filled with a dielectric gas at relatively low pressure; a pair of terminal bushings entering the top of said tank and extending into the interior of said tank; a plurality of gas blast circuit interrupters supported within said tank and insulated from said tank and electrically connected in series with one another, and electrically connected between said pair of terminal bushings; a support platform secured to the bottom of said tank; a relatively high pressure supply means disposed externally of said tank; and an interrupter support; said interrupter support comprising a hollow uniform cylindrical insulation tube of relatively thin wall thickness, and first and second spaced end caps connected to the opposite ends of said insulation tube; said insulation tube being disposed within said tank with its axis extending in a vertical direction; said first end cap being mechanically connected to said plurality of interrupters; said second end cap being connected to said support platform, whereby said interrupters are mechanically supported from said platform, and are electrically insulated from said tank; and means connecting the interior of said insulation tube to said high pressure supply, whereby said insulation tube is at a relatively high pressure; the interior volume of said insulation tube being sufficiently large to store relatively high pressure gas in sufficient amount for at least one gas blast operation of said plurality of interrupters.
Claim 2
Dependent Claim
240 words
A dead tank circuit breaker comprising, in combination: a generally flattened spherical metallic tank filled with a dielectric gas at relatively low pressure; a pair of terminal bushings entering the top of said tank and extending into the interior of said tank; a plurality of gas blast circuit interrupters supported within said tank and insulated from said tank and electrically connected in series with one another, and electrically connected between said pair of terminal bushings; a support platform secured to the bottom of said tank; a relatively high pressure supply means disposed externally of said tank; and an interrupter support; said interrupter support comprising a hollow uniform cylindrical insulation tube of relatively thin wall thickness, and first and second spaced end caps connected to the opposite ends of said insulation tube; said insulation tube being disposed within said tank with its axis extending in a vertical direction; said first end cap being mechanically connected to said plurality of interrupters; said second end cap being connected to said support platform, whereby said interrupters are mechanically supported from said platform, and are electrically insulated from said tank; and means connecting the interior of said insulation tube to said high pressure supply, whereby said insulation tube is at a relatively high pressure; the interior volume of said insulation tube being sufficiently large to store relatively high pressure gas in sufficient amount for at least one gas blast operation of said plurality of interrupters.
Claim 3
Dependent Claim
76 words
The circuit breaker of claim 1 which further includes blast valve means for controlling the release of relatively high pressure gas from said insulation tube, and through said interrupters and into the interior of said tank during the operation of said plurality of interrupters; said blast valve means being mounted on said first end cap means and communicating with the interior of said insulation tube; said plurality of interrupters being mounted on said blast valve means.
Claim 4
Dependent Claim
23 words
The circuit breaker of claim 1 wherein said insulation tube is of fiber glass construction and has a diameter of about 16 inches.
Claim 5
Dependent Claim
16 words
The circuit breaker of claim 1 wherein said first and second end caps are of metal.
Claim 6
Dependent Claim
57 words
The circuit breaker of claim 3 wherein said first and second end caps are of metal and wherein said end caps have cylindrical walls which extend over the ends and outer surfaces of said insulation tube; and first and second corona rings surrounding the ends of said cylindrical walls of said first and second end caps respectively.
Claim 7
Dependent Claim
76 words
The circuit breaker of claim 5 which further includes blast valve means for controlling the release of relatively high pressure gas from said insulation tube, and through said interrupters and into the interior of said tank during the operation of said plurality of interrupters; said blast valve means being mounted on said first end cap means and communicating with the interior of said insulation tube; said plurality of interrupters being mounted on said blast valve means.
Claim 8
Dependent Claim
69 words
The circuit breaker of claim 2 which further includes a second interrupter support, a second blast valve and a second plurality of interrupters disposed within said tank and being laterally spaced from and parallel to said first mentioned interrupter support, blast valve and plurality of interrupters and being identically constructed thereto, said plurality of interrupters, and said second plurality of interrupters being series-connected between said pair of terminal bushings.
Claim 9
Dependent Claim
23 words
The circuit breaker of claim 7 wherein said insulation tube is of fiber glass construction and has a diameter of about 16 inches.
Claim 10
Dependent Claim
16 words
The circuit breaker of claim 8 wherein said first and second end caps are of metal.
Claim 11
Dependent Claim
57 words
The circuit breaker of claim 8 wherein said first and second end caps are of metal and wherein said end caps have cylindrical walls which extend over the ends and outer surface of said insulation tube; and first and second corona rings surrounding the ends of said cylindrical walls of said first and second end caps respectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |