US4215256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-insulated switchgear apparatus
Assignee: Hitachi Ltd
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Filing: 1978-04-17
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Granted: 1980-07-29
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Expires: 1998-04-17
Abstract
Abstract 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 movable contact and a second movable contact which are insulatedly supported by a support device with respect to the sheath. There is provided a device for individually actuating the movable contacts which device comprises a pair of insulated actuating rods disposed adjacent and extending parallel to the insulating support device.
Inventors
- 👤 Minoru Sakaguchi
- 👤 Kazuaki Oishi
- 👤 Seizo Nakano
- 👤 Tuneo Kishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:36
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/20; H02B1/22; H01; H01H; H01H31/00; H01H31/26; H01H31/32; H02B13/00; H02B13/02; H02B13/035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
249 words
Gas-insulated switchgear apparatus comprising: a. a sheath filled with an insulating gas and kept at ground potential; b. a device located in said sheath and providing a first disconnect gap and a second disconnect gap, said device comprising a first movable contact and a second movable contact adapted to open and close said first disconnect gap and said second disconnect gap respectively, a hollow conductor slidably housing said first and second movable contacts and electrically connecting said first movable contact to said second movable contact, said hollow conductor being provided with a feeder contact thereon: c. a feeder conductor located in said sheath and electrically connected to said hollow conductor through said feeder contact; d. a device insulatingly supporting said hollow conductor with respect to said sheath; and e. a device for individually actuating said first movable contact and said second movable contact, said device comprising a pair of actuating rods made of an insulating material and operatively connected through respective link mechanisms to said first movable contact and said second movable contact respectively, and a pair of actuators, each actuator operatively connected to a respective one of said pair of actuating rods for individually and independently actuating said first movable contact and said second movable contact through the medium of said pair of actuating rods respectively, said pair of actuating rods disposed adjacent and extending parallel to said insulating support device, said link mechanisms being housed in said hollow conductor, and said actuators being located outside said sheath.
Claim 2
Dependent Claim
249 words
Gas-insulated switchgear apparatus comprising: a. a sheath filled with an insulating gas and kept at ground potential; b. a device located in said sheath and providing a first disconnect gap and a second disconnect gap, said device comprising a first movable contact and a second movable contact adapted to open and close said first disconnect gap and said second disconnect gap respectively, a hollow conductor slidably housing said first and second movable contacts and electrically connecting said first movable contact to said second movable contact, said hollow conductor being provided with a feeder contact thereon: c. a feeder conductor located in said sheath and electrically connected to said hollow conductor through said feeder contact; d. a device insulatingly supporting said hollow conductor with respect to said sheath; and e. a device for individually actuating said first movable contact and said second movable contact, said device comprising a pair of actuating rods made of an insulating material and operatively connected through respective link mechanisms to said first movable contact and said second movable contact respectively, and a pair of actuators, each actuator operatively connected to a respective one of said pair of actuating rods for individually and independently actuating said first movable contact and said second movable contact through the medium of said pair of actuating rods respectively, said pair of actuating rods disposed adjacent and extending parallel to said insulating support device, said link mechanisms being housed in said hollow conductor, and said actuators being located outside said sheath.
Claim 3
Dependent Claim
39 words
Gas-insulated switchgear apparatus as claimed in claim 1, wherein said insulating support device comprises a hollow support base made of an insulating material, so that said pair of actuating rods extend through the interior of said hollow support base.
Claim 4
Dependent Claim
50 words
Gas-insulated switchgear apparatus as claimed in claim 2, wherein said device providing said first disconnect gap and said second disconnect gap further comprises a first fixed contact and a second fixed contact insulatedly supported by said sheath and disposed adjacent said first movable contact and said second movable contact respectively.
Claim 5
Dependent Claim
103 words
Gas-insulated switchgear apparatus as claimed in claim 1, wherein said hollow conductor includes a central portion with a substantially rectangular cross section and a pair of cylindrical arm portions projecting from said central portion, said link mechanisms being housed in the vicinity of said central portion of said hollow conductor, said feeder contact being provided on an upper wall of said central portion and a grounding contact being provided on one side of said central portion, and a grounding device mounted on said sheath and adapted to contact said grounding contact so as to bring said feeder conductor to ground potential when desired.
Claim 6
Dependent Claim
213 words
In a gas-insulated switchgear apparatus comprising a sheath filled with an insulating gas and kept at ground potential and at least two movable contacts located in said sheath for providing disconnect gaps respectively, said movable contacts being actuated individually and independently from each other by respective actuators located outside said sheath to open and close said disconnect gaps respectively, wherein the improvement comprises a hollow conductor slidably housing said first and second movable contacts and electrically connecting said first movable contact to said second movable contact, said hollow conductor being provided with a feeder contact thereon, a feeder conductor located in said sheath and electrically connected to said hollow conductor through said feeder contact, a single means for insulatingly supporting said hollow conductor with respect to said sheath, and a pair of actuating rods of an insulating material extending parallel to each other and operatively connected at one end thereof through respective link mechanisms to said respective movable contacts and at the other end to said respective actuators, said pair of actuating rods being disposed adjacent and extending parallel to said supporting means, and said link mechanisms being housed in said hollow conductor, whereby the movable contacts and respective actuating rods are arranged for providing a compact construction of the gas-insulated switchgear apparatus.
Claim 7
Dependent Claim
213 words
In a gas-insulated switchgear apparatus comprising a sheath filled with an insulating gas and kept at ground potential and at least two movable contacts located in said sheath for providing disconnect gaps respectively, said movable contacts being actuated individually and independently from each other by respective actuators located outside said sheath to open and close said disconnect gaps respectively, wherein the improvement comprises a hollow conductor slidably housing said first and second movable contacts and electrically connecting said first movable contact to said second movable contact, said hollow conductor being provided with a feeder contact thereon, a feeder conductor located in said sheath and electrically connected to said hollow conductor through said feeder contact, a single means for insulatingly supporting said hollow conductor with respect to said sheath, and a pair of actuating rods of an insulating material extending parallel to each other and operatively connected at one end thereof through respective link mechanisms to said respective movable contacts and at the other end to said respective actuators, said pair of actuating rods being disposed adjacent and extending parallel to said supporting means, and said link mechanisms being housed in said hollow conductor, whereby the movable contacts and respective actuating rods are arranged for providing a compact construction of the gas-insulated switchgear apparatus.
References Cited (Backward Citations)
FR1441239A
Cited
US3946184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |