Patent US4551915A successfully refreshed from Google Patents.
US4551915A
Expired / Lapsed
US
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Method for terminating a high voltage cable
Assignee: Raychem Corp
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Filing: 1983-04-06
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Granted: 1985-11-12
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Expires: 2003-04-06
Abstract
Abstract An arrangement and method to control electrical stress in a region of high electric field strength associated with high voltage equipment, such as cable terminations and joints, includes a semiconductive layer of stress control material and an electrically conductive layer positioned over and in electrical contact with said semiconductive layer in the region of highest electrical stress associated with a discontinuity in the electric field of the equipment. The combination of the conductive layer and the semiconductive stress control layer improves the discharge extinction and the impulse performance of the electrical equipment with which it is used.
Inventors
- 👤 Peter L. Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:24
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/02; H02G15/06; H02G15/064; H02G15/068; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49174; Y10T29/49176
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
A method of terminating a high voltage cable comprising the steps of: (a) cutting back a cable jacket by a predetermined amount, leaving an exposed shield portion that includes a conductive layer; (b) cutting back an insulating layer of said cable by a predetermined amount, leaving an exposed length of a cable conductor for connection to a connector; (c) connecting the exposed length of conductor to a connector; (d) positioning a layer of semiconductive stress control material having a substantially uniform thickness over an exposed cut back portion of the insulation layer; and (e) providing an electrically conductive layer of material that overlies and is in contact with the semiconductive stress control material over the exposed shield portion and extending along the stress control material for a predetermined distance; and (f) applying an insulating layer over the stress control layer.
Claim 2
Independent Claim
140 words
A method of terminating a high voltage cable comprising the steps of: (a) cutting back a cable jacket by a predetermined amount, leaving an exposed shield portion that includes a conductive layer; (b) cutting back an insulating layer of said cable by a predetermined amount, leaving an exposed length of a cable conductor for connection to a connector; (c) connecting the exposed length of conductor to a connector; (d) positioning a layer of semiconductive stress control material having a substantially uniform thickness over an exposed cut back portion of the insulation layer; and (e) providing an electrically conductive layer of material that overlies and is in contact with the semiconductive stress control material over the exposed shield portion and extending along the stress control material for a predetermined distance; and (f) applying an insulating layer over the stress control layer.
Claim 3
Dependent Claim
21 words
A method of claim 1, wherein the electrically conductive material is positioned between said stress control material and said insulating layer.
Claim 4
Dependent Claim
36 words
A method in accordance with claim 1, which further comprises the step of positioning a void filling composition at the end of the exposed shield portion prior to applying the layer of semiconductive stress control material.
References Cited (Backward Citations)
US3066180A
Cited
US3210460A
Cited
US3317655A
Cited
DE2263909A1
Cited
US3816639A
Cited
US4431861A
Cited
US4159860A
Cited
FR2312128A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |