US3795820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-connection arrangement between phase-isolated metal enclosures of insulating-gas-filled high-voltage conductors
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1973-01-10
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Granted: 1974-03-05
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Expires: 1993-01-10
Abstract
Abstract A polyphase high-voltage conductor system in which each phase conductor is enclosed within a metallic sheath filled with insulating gas. The sheaths are sectionalized into lengths which are directly and permanently cross-connected to each other at one end but at the opposite end are cross-connected through variable impedances which enable the currents flowing in the metallic sheaths to be varied between minimum and maximum values in relation to the service current to be transmitted by the conductors such that the conductors operate in a condition approximating the natural tie-line power.
Inventors
- 👤 A Eidinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:56
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; Y; Y02; Y02E; Y02E40/00; Y02E40/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
In a polyphase high-voltage conductor system wherein rigid rectilinear conductors extend in parallel spaced relation and wherein said conductors are located within individual tubular metallic sheaths filled with an insulating gas, the sheaths being sectionalized into lengths, the improvement wherein the said sheath sections are directly and permanently cross-connected to each other at the end and at the opposite end are cross-connected by means including variable impedanceS thus enabling currents in the metallic sheaths to be varied between a minimum and maximum value in relation to the service current to be transmitted by the high-voltage conductors such that the conductors operate in a condition approximating the natural tie-line power.
Claim 2
Dependent Claim
109 words
In a polyphase high-voltage conductor system wherein rigid rectilinear conductors extend in parallel spaced relation and wherein said conductors are located within individual tubular metallic sheaths filled with an insulating gas, the sheaths being sectionalized into lengths, the improvement wherein the said sheath sections are directly and permanently cross-connected to each other at the end and at the opposite end are cross-connected by means including variable impedanceS thus enabling currents in the metallic sheaths to be varied between a minimum and maximum value in relation to the service current to be transmitted by the high-voltage conductors such that the conductors operate in a condition approximating the natural tie-line power.
Claim 3
Dependent Claim
41 words
The invention as defined in claim 1 wherein said variable impedance for each phase is constituted by series-connected stepped resistances, each said resistance being connected in parallel with a switching device which functions to provide a shut for the appertaining resistance.
Claim 4
Dependent Claim
36 words
The invention as defined in claim 1 wherein said variable impedance for each phase is paralleled by a device which serves to bridge the impedance when a preselectable value of the phase conductor current is reached.
Claim 5
Dependent Claim
73 words
The invention as defined in claim 1 wherein said variable impedance for each phase is constituted by series-connected stepped resistances, each said resistance being connected in parallel with a switching device which functions to provide a shunt for the appertaining resistance and wherein the stepped resistances for each phase are paralleled by a spark gap which functions to bridge the stepped resistances when a preselectable value of the phase conductor current is reached.
Claim 6
Dependent Claim
57 words
The invention as defined in claim 1 wherein said variable impedance for each phase is constituted by series-connected resistances, each said resistance being connected in parallel with a switching device which functions to provide a shunt for the appertaining resistance, and switch actuating means common to the switching devices which control corresponding valued resistances for each phase.
Claim 7
Dependent Claim
41 words
The invention as defined in claim 5 and which further includes a device connected in parallel with the series-connected resistances for each phase and which serves to bridge said resistances when a preselectable value of the phase conductor current is reached.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |