Patent US4097681A successfully refreshed from Google Patents.
US4097681A
Expired / Lapsed
US
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Interface for high voltage oil-filled and gas-filled apparatus
Assignee: ITE Industries Ltd
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Filing: 1977-01-31
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Granted: 1978-06-27
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Expires: 1997-01-31
Abstract
Abstract Gas-insulated electrical apparatus is connected to oil-insulated electrical apparatus within an intermediate oil-filled tank having an oil pressure lower than the pressure within the oil-insulated apparatus. If gas leaks into the relatively low pressure oil, the gas contaminated oil cannot leak into the oil-insulated equipment. The intermediate oil-filled tank has larger electrical clearances than the oil-insulated apparatus.
Inventors
- 👤 Edward M. Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
Apparatus for connecting a gas-insulated high-voltage conductor to oil-insulated electrical apparatus; said gas-insulated high-voltage conductor comprising a central conductor suspended within a gas-filled elongated grounded housing; said oil-insulated apparatus comprising electrical apparatus disposed within a grounded oil-filled housing; said connecting apparatus comprising an intermediate oil-filled housing, an oil-filled bushing connected to said electrical apparatus and extending through said grounded oil-filled housing and into said intermediate housing, and a sealed gas-filled bushing connected to said central conductor and extending into said intermediate oil-filled housing; the conductors of said oil-filled bushing and of said gas-filled bushing being connected together within said intermediate housing; and pressure differential means for maintaining the oil pressure within said grounded oil-filled housing greater than the oil pressure within said intermediate housing, whereby gas which escapes into said oil in said intermediate housing will not leak into said grounded oil-filled housing.
Claim 2
Dependent Claim
143 words
Apparatus for connecting a gas-insulated high-voltage conductor to oil-insulated electrical apparatus; said gas-insulated high-voltage conductor comprising a central conductor suspended within a gas-filled elongated grounded housing; said oil-insulated apparatus comprising electrical apparatus disposed within a grounded oil-filled housing; said connecting apparatus comprising an intermediate oil-filled housing, an oil-filled bushing connected to said electrical apparatus and extending through said grounded oil-filled housing and into said intermediate housing, and a sealed gas-filled bushing connected to said central conductor and extending into said intermediate oil-filled housing; the conductors of said oil-filled bushing and of said gas-filled bushing being connected together within said intermediate housing; and pressure differential means for maintaining the oil pressure within said grounded oil-filled housing greater than the oil pressure within said intermediate housing, whereby gas which escapes into said oil in said intermediate housing will not leak into said grounded oil-filled housing.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein said intermediate housing is disposed vertically above said grounded oil-filled housing.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 wherein said gas-insulated conductor is disposed vertically above said intermediate housing.
Claim 5
Dependent Claim
45 words
The apparatus of claim 3 wherein said pressure differential means includes a first oil conservator chamber hydraulically connected to said intermediate housing and a second oil conservator chamber hydraulically connected to said grounded oil-filled housing; said second chamber being disposed vertically above said first chamber.
Claim 6
Dependent Claim
45 words
The apparatus of claim 1 wherein said pressure differential means includes a first oil conservator chamber hydraulically connected to said intermediate housing and a second oil conservator chamber hydraulically connected to said grounded oil-filled housing; said second chamber being disposed vertically above said first chamber.
Claim 7
Dependent Claim
17 words
The apparatus of claim 5 wherein said intermediate housing is disposed vertically above said grounded oil-filled housing.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |