US3823346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-gas-insulated electric switching system
Assignee: Siemens AG
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Filing: 1973-01-09
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Granted: 1974-07-09
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Expires: 1993-01-09
Abstract
Abstract An electric high-voltage switching system of the metal-clad compressed-gas-insulated type has two bus bars individually connected through bus bar disconnect switches with a power circuit breaker from which a branch line is supplied with current. An additional disconnect switch connects at least one of the bus bar disconnect switches on its side connected with the bus bar, with the branch line. Closing of this additional disconnect switch permits the branch line to remain powered when the bus bar disconnect switch is opened and/or the power circuit breaker is opened.
Inventors
- 👤 W Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:59
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/20; H02B1/22; H02B1/24; H02B5/00; H02B5/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A metal-clad, gas-insulated electrical switching system having at least one bus bar, a branch line, a circuit breaker, a first disconnect switch for connecting one end of the circuit breaker to the bus bar, and a second disconnect switch for connecting the other end of the circuit breaker to the branch line whereby opening of the circuit breaker or either of the disconnect switches normally prevents use of the branch line, the switching system being configured so as to cause the branch line and the first disconnect switch to be positioned adjacent to each other; wherein the improvement comprises an additional disconnect switch, one side of said additional disconnect switch being connected directly to the first disconnect switch and the other side of said additional disconnect switch being connected directly to the branch line.
Claim 2
Dependent Claim
134 words
A metal-clad, gas-insulated electrical switching system having at least one bus bar, a branch line, a circuit breaker, a first disconnect switch for connecting one end of the circuit breaker to the bus bar, and a second disconnect switch for connecting the other end of the circuit breaker to the branch line whereby opening of the circuit breaker or either of the disconnect switches normally prevents use of the branch line, the switching system being configured so as to cause the branch line and the first disconnect switch to be positioned adjacent to each other; wherein the improvement comprises an additional disconnect switch, one side of said additional disconnect switch being connected directly to the first disconnect switch and the other side of said additional disconnect switch being connected directly to the branch line.
Claim 3
Dependent Claim
58 words
The switching system of claim 1, said one side of said additional disconnect switch being connected directly to the side of the first disconnect switch connected to the bus bar whereby closing said additional disconnect switch causes the same to bypass the circuit breaker and the first and second disconnect switches to permit usE of the branch line.
Claim 4
Dependent Claim
30 words
The switching system of claim 1 including a second bus bar and a supplementary disconnect switch for connecting the second bus bar to the one end of the circuit breaker.
Claim 5
Dependent Claim
51 words
The switching system of claim 3 wherein the respective ends of the first disconnect switch and the supplementary disconnect switch disposed away from the bus bars conjointly defining a common node, the switching system comprising a further disconnect switch connected between said node and the one end of the circuit breaker.
Claim 6
Dependent Claim
21 words
The switching system of claim 4, said additional disconnect switch being connected to said first disconnect switch at said common node.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |