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| Number | Title | Issue Date |
| 4827088 | Electrical ring main unit A three-phase electrical ring main unit comprising a lower chamber module (30) having a wall structure formed from insulating resin material; three input contacts (35), one for each phase, mounted within the lower chamber; three lower switching contacts (... | 05/02/1989 |
| 4769740 | Pressurized gas-insulated three-phase encapsulated high-voltage circuit breaker A pressurized gas-insulated circuit breaker includes a substantially tubular encapsulating housing having ends, a plurality of circuit breaker poles in phases, at least one of which is disposed in the encapsulating housing, and current feed lines. Each li... | 09/06/1988 |
| 4527220 | Multiphase switchgear for high voltages Multiphase switchgear for high voltages consisting in a number of components such as switches, transformers for measurement and protection, busbars and cable connecting means, said components being interconnected by coupling elements and said components a... | 07/02/1985 |
| 4513187 | High-voltage circuit breaker including cut-on resistor A series connection of an auxiliary switching position and a cut-on resistor is connected parallel to at least one primary switching position. A common drive rod is provided with which there is coupled a transmission system operatively associated with the... | 04/23/1985 |
| 4510359 | Circuit interrupter having improved closing resistor control means Sporadic malfunctions of the closing resistor mechanism employed in a power circuit breaker to connect a resistor in parallel with the breaker contacts (prior to closing of such contacts) is prevented by providing an improved control and actuating means f... | 04/09/1985 |
| 4499350 | Circuit breaker with overvoltage suppression A circuit breaker including at least one circuit-breaking portion connected in parallel with a respective overvoltage suppression portion which includes, in series connection, a resistor which suppresses the switching overvoltage of the respective circuit... | 02/12/1985 |
| 4486633 | High-voltage Y-shaped dead tank circuit interrupter A gas-insulated circuit breaker is described which includes a Y-shaped hollow grounded metal tank formed from three appropriately shaped pipes joined together. A hollow insulating bushing is secured to each upstanding leg. A stationary and a movable conta... | 12/04/1984 |
| 4471185 | Series multiple nozzles for gas blast circuit interrupter A flow nozzle for a circuit interrupter includes a plurality of at least two throat regions which permit at least two transitions from subsonic to supersonic flow in the main nozzle flow channel. Very high speed photographs made of the operation of arc in... | 09/11/1984 |
| 4379957 | Modular "Y"-type enclosure elements for gas insulated substations A modular "Y"-type enclosure element particularly adapted for gas insulated substations. The enclosure element comprises a first generally "Y"-shaped enclosure element having a circuit protective device, such as a circuit breaker or conductor, disposed th... | 04/12/1983 |
| 4215256 | Gas-insulated switchgear apparatus Gas-insulated switchgear apparatus wherein a device providing a first disconnect gap and a second disconnect gap is located in a sheath filled with an insulating gas and kept at ground potential. The disconnect gaps providing device comprises a first mova... | 07/29/1980 |
| 4211903 | Electromagnetic puffer type gas circuit breaker An electromagnetic puffer type gas circuit breaker comprises two opposing puffer type gas circuit breaking units mounted on midway support means, actuating means for driving the circuit breaking units, an electromagnetic actuating unit drivingly coupled t... | 07/08/1980 |
| 4172270 | Compressed gas filled circuit breaker An electrical circuit breaker comprising a pair of switches 40 connected in series in a power line L, a pair of drive coils 42 disposed adajcent the switches for electromagnetically repelling them when energized, and a remotely positioned transformer 44, ... | 10/23/1979 |
| 4052575 | Metal-clad gas-type high-power circuit-breaker constructions involving two arc-extinguishing assemblages An improved metal-clad gas-type high-power circuit-breaker construction is provided involving two upstanding circuit-breaker assemblages electrically interconnected adjacent their upper ends, and connected into the series line transmission circuit, prefer... | 10/04/1977 |
| 4032988 | Compressed gas filled circuit breaker 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... | 06/28/1977 |
| 4029922 | Operating device for enclosed high voltage circuit breakers An operating device for a high pressure circuit breaker enclosed in an elongated casing filled with compressed gas with a high-pressure chamber and a low-pressure chamber includes a driving arrangement operated by compressed gas. A compressed gas valve is... | 06/14/1977 |
| 4005345 | Multi-phase gas-type circuit-interrupter substitution modular construction A simplified-type of multi-phase compressed-gas circuit-interrupter installation is provided in which costly and complicated I-beam base structures are eliminated, and the low-pressure gas-reservoir tank is so used and located as to provide a lower main s... | 01/25/1977 |
| 3946184 | Circuit breaker A circuit breaker having a pair of circuit breaking units electrically insulated from ground by supporting means of electrical insulator, an actuator disposed on ground, and an actuating force transmission path including a single actuating rod of electric... | 03/23/1976 |
