US4032988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed gas filled circuit breaker
Assignee: Fuji Electric Co Ltd
•
Filing: 1976-01-30
•
Granted: 1977-06-28
•
Expires: 1996-01-30
Abstract
Abstract A compressed gas filled circuit breaker has electromagnetically controlled breaker switches located in a gas filled tank along with a secondary coil. Control circuitry including a capacitor is coupled to a primary coil and is located on the ground side of the circuit breaker.
Inventors
- 👤 Nobuaki Kiyokuni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:55
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/42; H02; H02H; H02H3/00; H02H3/02; H02H3/021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
A circuit breaker of the type having a high potential side and a ground side, at least one contact having a movable contact element, at least one corresponding driving coil disposed in the vicinity of said movable contact element, a capacitor for supplying a current to said at least one driving coil by discharging the energy stored therein to drive said movable contact element by an electromagnetic repulsive force acting between said movable contact element and said driving coil, to thereby open said contact, the improvement comprising said capacitor being disposed on said ground side, a transformer having a primary coil disposed on the ground side and connected to said capacitor, and a secondary coil disposed on the high potential side and connected to said driving coil and electromagnetically coupled to said primary coil, said contact, driving coil, primary and secondary coils being located inside a grounded tank filled with a compressed gas having arc suppression properties.
Claim 2
Dependent Claim
157 words
A circuit breaker of the type having a high potential side and a ground side, at least one contact having a movable contact element, at least one corresponding driving coil disposed in the vicinity of said movable contact element, a capacitor for supplying a current to said at least one driving coil by discharging the energy stored therein to drive said movable contact element by an electromagnetic repulsive force acting between said movable contact element and said driving coil, to thereby open said contact, the improvement comprising said capacitor being disposed on said ground side, a transformer having a primary coil disposed on the ground side and connected to said capacitor, and a secondary coil disposed on the high potential side and connected to said driving coil and electromagnetically coupled to said primary coil, said contact, driving coil, primary and secondary coils being located inside a grounded tank filled with a compressed gas having arc suppression properties.
Claim 3
Dependent Claim
31 words
A circuit breaker as claimed in claim 1 further comprising electrical means having no optical portions for initiating the discharge of said capacitor in response to a circuit braking condition ocurring.
References Cited (Backward Citations)
US3532843A
Cited
US3780349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |