US4042968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage electrical installation
Assignee: Delle Alsthom SA
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Filing: 1976-03-08
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Granted: 1977-08-16
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Expires: 1996-03-08
Abstract
Abstract High-voltage high-power, multiphase electrical installation comprising, for each phase, at least two circuit fields that include, in each circuit field, a circuit breaker arranged between two current transformers, each of them discharging into the same load as the homologous current transformers of the other circuit fields having the same phase; isolating switches placed at the ends; earth isolators placed between the isolating switches and the current transformers. The magnetic circuit of the current transformers is crossed simultaneously by the conductor of the phase of the circuit field and by an auxiliary conductor connected; on the one hand, to a ground isolator and, on the other hand, to a ground point.
Inventors
- 👤 Georges Kypreos
- 👤 Lucien Orgeret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:01
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
165 words
A multi-phase high-voltage electrical installation comprising, for each phase, at least two circuit fields, each field including, along a phase conductor, a circuit breaker arranged between first and second isolating switches; a first current transformer arranged between said first switch and said circuit breaker; a second current transformer arranged between said circuit breaker and said second switch; said first transformers of said circuit fields being connected to a first common load, said second transformers being connected to a second common load; a first ground isolator connected to said phase conductor between said first transformer and said first switch; a second ground isolator connected to said phase conductor between said second transformer and said second switch; wherein the magnetic circuit of each said current transformers, which are connected to the same load, is crossed simultaneously by said phase conductor of the circuit field to which that transformer belongs; and an auxiliary conductor connecting said ground isolator of the same circuit field at least temporarily to ground.
Claim 2
Dependent Claim
165 words
A multi-phase high-voltage electrical installation comprising, for each phase, at least two circuit fields, each field including, along a phase conductor, a circuit breaker arranged between first and second isolating switches; a first current transformer arranged between said first switch and said circuit breaker; a second current transformer arranged between said circuit breaker and said second switch; said first transformers of said circuit fields being connected to a first common load, said second transformers being connected to a second common load; a first ground isolator connected to said phase conductor between said first transformer and said first switch; a second ground isolator connected to said phase conductor between said second transformer and said second switch; wherein the magnetic circuit of each said current transformers, which are connected to the same load, is crossed simultaneously by said phase conductor of the circuit field to which that transformer belongs; and an auxiliary conductor connecting said ground isolator of the same circuit field at least temporarily to ground.
Claim 3
Dependent Claim
24 words
The electrical installation as defined in claim 1, wherein said ground isolators are integrated with said isolating switches that are arranged in their vicinity.
Claim 4
Dependent Claim
18 words
The electrical installation as defined in claim 1, wherein said auxiliary conductor constitutes a permanently installed fixed circuit.
Claim 5
Dependent Claim
27 words
The electrical installation as defined in claim 1, wherein said auxiliary conductor is a circuit installed at the time of putting said circuit field out of service.
Claim 6
Dependent Claim
18 words
The electrical installation as defined in claim 1, wherein said ground connection of the auxiliary conductor is permanent.
Claim 7
Dependent Claim
29 words
The electrical installation as defined in claim 1, wherein said ground connection of the auxiliary conductor is effected at the time of putting said circuit field out of service.
Claim 8
Dependent Claim
15 words
The electrical installation as defined in claim 1, which is formed in a cellular switchboard.
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |