US3793475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric system for a high voltage power transmission cable and termination
Assignee: Nuclear Chicago Corp
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Filing: 1972-07-10
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Granted: 1974-02-19
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Expires: 1992-07-10
Abstract
Abstract A high voltage power transmission system includes a power transmission cable having an improved dielectric system. The dielectric system is formed of two or more concentric sections each separated by thin conductive layers and each section carrying predetermined precentages of the total applied potential. In addition there is provided an improved termination for the high voltage power transmission cable including a resistive system selected to divide the applied voltage into the preselected voltage levels.
Inventors
- 👤 E Yonkers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:42
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/02; H02; H02G; H02G15/00; H02G15/02; H02G15/06; H02G15/064; H02G15/072
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
In combination: a high voltage cable comprising a conductive core, a conductive shield spaced concentrically outwardly of said core, a solid dielectric system filling the space between said core and said shield, said dielectric being formed of a plurality of concentric sections, each section being of a material having a preselected dielectric constant providing a preselected voltage stress across each section to provide a preselected voltage level across each section; non-load carrying conductive layers between the sections; and a resistance system interconnecting the conductive core, conductive layers, and conductive shield, the resistances of said system being selected to divide the applied voltage into said preselected voltage levels.
Claim 2
Dependent Claim
107 words
In combination: a high voltage cable comprising a conductive core, a conductive shield spaced concentrically outwardly of said core, a solid dielectric system filling the space between said core and said shield, said dielectric being formed of a plurality of concentric sections, each section being of a material having a preselected dielectric constant providing a preselected voltage stress across each section to provide a preselected voltage level across each section; non-load carrying conductive layers between the sections; and a resistance system interconnecting the conductive core, conductive layers, and conductive shield, the resistances of said system being selected to divide the applied voltage into said preselected voltage levels.
Claim 3
Dependent Claim
35 words
The combination of claim 1, a termination on said cable including a dielectric housing formed of a plurality of insulating elements, said resistive system comprising resistive layers on the inner surface of said insulating elements.
Claim 4
Dependent Claim
23 words
The combination of claim 2 and including voltage level members defined at the ends of said elements being connected to said resistance system.
Claim 5
Dependent Claim
67 words
A high voltage cable comprising a conductive core, a conductive shield spaced concentrically outwardly of said core, and a solid dielectric system filling the space between said core and said shield, said dielectric system being formed of a plurality of concentric sections of equal thickness and capacitance having different dielectric constants providing substantially equal voltage stresses across each section, and non-load carrying conductive layers between the sections.
Claim 6
Dependent Claim
67 words
A high voltage cable comprising a conductive core, a conductive shield spaced concentrically outwardly of said core, and a solid dielectric system filling the space between said core and said shield, said dielectric system being formed of a plurality of concentric sections of equal thickness and capacitance having different dielectric constants providing substantially equal voltage stresses across each section, and non-load carrying conductive layers between the sections.
Claim 7
Dependent Claim
20 words
A high voltage cable as set forth in claim 4 above wherein the capacitance across each section follows the equation:
Claim 8
Dependent Claim
37 words
A termination as set forth in claim 6 wherein the concentric sections are of equal thickness, and the conductive layers are at equal increments of voltage, the further improvement wherein said insulating elements are of equal length.
Claim 9
Dependent Claim
69 words
In combination, a termination of the type set forth in claim 7 above with a high voltage cable of the type set forth therein, each concentric section and conductive layer at its inner surface being terminated in stepped relation to the length of adjacent insulating elements; and further including insulating filler elements filling the space between the outer surface of each stepped concentric section and the surrounding insulating element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |