US3665249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage direct current circuit breaker
Assignee: Hydro-Québec Research Institute
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Filing: 1970-10-28
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Granted: 1972-05-23
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Expires: 1990-10-28
Abstract
Abstract A high voltage direct current circuit breaker comprising several modules connected in series, each module including an electrodynamic mechanism connected to the mobile contacts of the circuit breaker and permitting to open very rapidly such contacts under load thus creating an electric arc between the contacts. Each module includes at least one deionizing chamber comprising a suitable number of parallel metallic plates disposed perpendicularly to the electric arc to form quenching channels for the electric arc. Finally, each module comprises at least one magnetic arc extinguishing system for deflecting the electric arc of the contacts into the deionizing chamber and for forcing such arc to enter into the quenching channels to break it into a number of short arcs so as to create an arc voltage which is higher than the nominal voltage of the circuit, and for quenching such small arcs and finally extinguish them.
Inventors
- 👤 Vladislav Zajic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/285; H01H33/04; H01H33/14; H01H33/18; H01H33/59; H01H33/596
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
231 words
A high voltage direct current circuit breaker comprising a series of modules, each including: a. at least one electrodynamic mechanism connected to the mobile contacts of the circuit breaker to separate the contacts under load in a very short interval thus creating an electric arc between the contacts; b. at least one deionizing chamber composed of a suitable number of parallel metallic plates disposed perpendicularly to the arc so as to form quenching channels for the arc; and c. at least one magnetic arc extinguishing system for deflecting the electric arc into the deionizing chamber and for forcing the arc to enter into the quenching channels to break up the arc into a number of small arcs so as to create an arc voltage which is higher than the nominal voltage of the circuit so as to quench the small arcs and finally extinguish them, said magnetic arc extinguishing system being independent of the main circuit of the circuit breaker and including at least two windings each connected to a separate bank of pre-charged condensers and means for discharging said banks of condensers so as to obtain an optimal coordination of the parameters of the arc extinguishing system in term of the distribution of the magnetic field in space in the deionizing chamber and in term of its path in time with the shape and the magnitude of the interrupted current.
Claim 2
Dependent Claim
231 words
A high voltage direct current circuit breaker comprising a series of modules, each including: a. at least one electrodynamic mechanism connected to the mobile contacts of the circuit breaker to separate the contacts under load in a very short interval thus creating an electric arc between the contacts; b. at least one deionizing chamber composed of a suitable number of parallel metallic plates disposed perpendicularly to the arc so as to form quenching channels for the arc; and c. at least one magnetic arc extinguishing system for deflecting the electric arc into the deionizing chamber and for forcing the arc to enter into the quenching channels to break up the arc into a number of small arcs so as to create an arc voltage which is higher than the nominal voltage of the circuit so as to quench the small arcs and finally extinguish them, said magnetic arc extinguishing system being independent of the main circuit of the circuit breaker and including at least two windings each connected to a separate bank of pre-charged condensers and means for discharging said banks of condensers so as to obtain an optimal coordination of the parameters of the arc extinguishing system in term of the distribution of the magnetic field in space in the deionizing chamber and in term of its path in time with the shape and the magnitude of the interrupted current.
Claim 3
Dependent Claim
81 words
A circuit breaker as defined in claim 1, in which the electrodynamic mechanism comprises a primary winding in the shape of a disk and at least one secondary winding made of a single short-circuited turn and coaxial with the primary winding, and switching means for creating a sudden electric discharge through the primary winding so as to produce a repulsive force between the primary winding and the secondary winding resulting in a rapid movement which is transmitted to the electric contacts.
Claim 4
Dependent Claim
17 words
A circuit breaker as defined in claim 2, in which the switching means is a mechanical contact.
Claim 5
Dependent Claim
18 words
A circuit breaker as defined in claim 2, in which the switching means is a controlled spark-gap device.
Claim 6
Dependent Claim
22 words
A circuit breaker as defined in claim 2, in which the sudden electric discharge is provided by a bank of pre-charged condensers.
Claim 7
Dependent Claim
38 words
A circuit breaker as defined in claim 2, comprising two secondary disks arranged back to back permitting to operate two sets of contacts, one placed in one half of a module and the other in the other half.
Claim 8
Dependent Claim
39 words
A circuit breaker as defined in claim 1, in which the ends of the metallic plates located at the entrance of the deionizing chamber are in the form of a wedge oriented against the movement of the electric arc.
Claim 9
Dependent Claim
52 words
A circuit breaker as defined in claim 1, in which the ends of the metallic plates located at the entrance of the deionizing chamber are in three levels shifted from each other in the direction of movement of the arc, the ends of the metallic plates being alternately placed in different levels.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |