US3780349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-tension circuit breaker
Assignee: Fuji Electric Co Ltd
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Filing: 1972-10-24
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Granted: 1973-12-18
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Expires: 1992-10-24
Abstract
Abstract In a high-tension circuit breaker including, in the high-tension side thereof insulated from the ground side by porcelain insulating tubes or the like, a contact mechanism which operates interrupting contacts of the circuit breaker utilizing electric energy stored in a capacitor, there is provided means for charging the capacitor from the high-tension line voltage of the circuit breaker. Various modifications of the charging means are also described.
Inventors
- 👤 Y Nitta
- 👤 N Kiyokuni
- 👤 K Kawasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/42; H01H33/423; H01H33/28; H01H33/285; H02; H02H; H02H1/00; H02H1/0061; H02H1/0069; H02H1/06; H02H1/063
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
In a high-tension circuit breaker including, on the hightension side thereof insulated from the ground side by insulating tubes, a contact mechanism which operates interrupting contacts of the circuit breaker utilizing electric energy stored in a capacitor, an improvement comprising means for charging the capacitor from the high-tension line voltage of the circuit breaker.
Claim 2
Dependent Claim
54 words
In a high-tension circuit breaker including, on the hightension side thereof insulated from the ground side by insulating tubes, a contact mechanism which operates interrupting contacts of the circuit breaker utilizing electric energy stored in a capacitor, an improvement comprising means for charging the capacitor from the high-tension line voltage of the circuit breaker.
Claim 3
Dependent Claim
47 words
A circuit breaker as set forth in claim 1 wherein a current transformer through which a line current of the circuit breaker is passed as its primary current is provided on the high-tension side, and the secondary current of the transformer is utilized for charging said capacitor.
Claim 4
Dependent Claim
43 words
A circuit breaker as set forth in claim 2, comprising means for rectifying the secondary current of said current transformer, a storage battery charged by the rectifying means, and an inverter for converting the output of the storage battery into an a.c. voltage.
Claim 5
Dependent Claim
58 words
A circuit breaker as set forth in claim 1 wherein a plurality of voltage dividing capacitors connected in series are provided between a line conductor of the circuit breaker and the ground, and the voltage obtained across one of the voltage dividing capacitors is utilized for charging said capacitor for operating the interrupting contacts of the circuit breaker.
Claim 6
Dependent Claim
29 words
A circuit breaker as set forth in claim 4 wherein said voltage dividing capacitors are included in said insulating tubes for supporting the high-tension side of the circuit breaker.
Claim 7
Dependent Claim
56 words
A circuit breaker as set forth in claim 1 wherein a synchronizing control device including a synchronizing detector is further provided on the high-tension side, and an interruption commanding signal synchronized with the line current is obtained therein by synthesizing a command signal sent from the ground side and a signal obtained fRom the synchronizing detector.
Claim 8
Dependent Claim
55 words
A circuit breaker as set forth in claim 1 wherein one portion thereof corresponding to one phase of the power line - further comprises a plurality of breaker units connected in series and means for operating the plurality of breaker units simultaneously when an interrupting command signal is applied to one of the breaker units.
Claim 9
Dependent Claim
30 words
A circuit breaker as set forth in claim 7 wherein an electro-magnetic wave is employed for conveying the interrupting command signal from one of the breaker units to the others.
Claim 10
Dependent Claim
53 words
A circuit breaker as set forth in claim 7 wherein the transmission and reception of an electromagnetic wave between a breaker unit receiving the command signal from the ground side and other breaker units commanded by the breaker unit are carried out in the high-tension side casing of each of the breaker units.
Claim 11
Dependent Claim
15 words
A circuit breaker as set forth in claim 8 wherein the electro-magnetic wave is light.
Claim 12
Dependent Claim
54 words
A circuit breaker as set forth in claim 7 wherein the commanding signal issued from the one breaker unit to the other breaker units is sent back once to the ground potential side of the breaker unit and then transmitted to the other breaker units through the ground-potential side portions of these breaker units.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |