Patent US3777178A successfully refreshed from Google Patents.
US3777178A
Expired / Lapsed
US
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Interrupter device for high voltage direct current
Assignee: Individual
•
Filing: 1972-10-02
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Granted: 1973-12-04
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Expires: 1992-10-02
Abstract
Abstract The overvoltages, occurring on the opening of circuit-breakers, are limited by successively inserting a series of resistances into the line to be broken, the residual current, at the time of the final break, being transferred to capacitors. Each of the preliminary circuit-breaker (D1 or D2) is associated with a resistance (R1 or R2) to be inserted and with a capacitor (C1 or C2), each of said capacitors being connected at two points of the circuit which are situated one at each side of the associated preliminary circuit-breaker (D1 or D2) and the final circuitbreaker (D3).
Inventors
- 👤 J Gratzmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/59; H01H33/596; H01H33/04; H01H33/16; H01H33/167
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
An interrupter device for high voltage high intensity direct current comprising a main circuit containing, in series, a first terminal, a plurality of resistances, a final switching element located between two of the said resistances, and a second terminal, a transfer switching element being associated with each said resistance and being connected to said main circuit on opposite sides of the pertaining resistance, and a capacitor to assist the transfer is associated with at least certain of the transfer switching elements, each said capacitor being connected at two points on the main circuit which are situated one at each side of the associated transfer switching element and the final switching element, the arrangement being such that on successively opening said transfer switching elements successively to insert said resistances the switching overvoltages are reduced.
Claim 2
Dependent Claim
133 words
An interrupter device for high voltage high intensity direct current comprising a main circuit containing, in series, a first terminal, a plurality of resistances, a final switching element located between two of the said resistances, and a second terminal, a transfer switching element being associated with each said resistance and being connected to said main circuit on opposite sides of the pertaining resistance, and a capacitor to assist the transfer is associated with at least certain of the transfer switching elements, each said capacitor being connected at two points on the main circuit which are situated one at each side of the associated transfer switching element and the final switching element, the arrangement being such that on successively opening said transfer switching elements successively to insert said resistances the switching overvoltages are reduced.
Claim 3
Dependent Claim
40 words
An interrupter device as claimed in claim 1, wherein the switching element, associated with that resistance which is the first to be brought into operation, is connected directly between the first terminal and the second terminal of the main circuit.
Claim 4
Dependent Claim
22 words
An interrupter device as claimed in claim 1, wherein said resistances are non-linear and successively introduced resistances are of successively greater value.
Claim 5
Dependent Claim
22 words
An interrupter device as claimed in claim 2, wherein said resistances are non-linear and successively introduced resistances are of successively greater value.
References Cited (Backward Citations)
US3641358A
Cited
US3660723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |