US4570202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-insulated switchgear equipment
Assignee: Hitachi Ltd
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Filing: 1982-10-15
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Granted: 1986-02-11
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Expires: 2002-10-15
Abstract
Abstract A plurality of breaking portions forming a vertically-disposed circuit breaker are connected in series and open and close the circuit within a gas-tight sealed enclosure. The enclosure is provided at its both sides with openings for connection of one and the other ends of the breaking portions, to which openings main bus bars and an insulated-led-out device are connected, respectively. The breaking portions each have a fixed contactor and a movable contactor, and the movable contactor is put into contact with or is separated from the fixed contactor by moving the movable contactor upward or downward under control of an operating device.
Inventors
- 👤 Isao Nishida
- 👤 Koji Sasaki
- 👤 Seizo Nakano
- 👤 Shigetaka Takeuchi
- 👤 Takeshi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:33
CPC Classifications
H; H02; H02B; H02B13/00; H02B13/02; H02B5/00; H02B5/06; H02B13/035
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
A gas-insulated switchgear equipment comprising: a plurality of vertically disposed circuit breaking portions connected in series with one another for opening and closing the circuit, said circuit breaking portions having an upper position and a lower position in the vertical direction; an enclosure for gas-tight sealing said circuit breaking portions; disconnecting switches connected through respective connecting bus bars to one end of said circuit breaking portions on one side of said enclosure; main bus bars connected respectively to said disconnecting switches; insulated-led-out means connected through a connecting bus bar to the other end of said circuit breaking portions on the other side of said enclosure; conductors connected so as to extend transversely to said vertically disposed circuit breaking portions at one of the upper and lower positions of said circuit breaking portions; and insulating supporters for fixing said circuit breaking portions to said enclosure.
Claim 2
Dependent Claim
144 words
A gas-insulated switchgear equipment comprising: a plurality of vertically disposed circuit breaking portions connected in series with one another for opening and closing the circuit, said circuit breaking portions having an upper position and a lower position in the vertical direction; an enclosure for gas-tight sealing said circuit breaking portions; disconnecting switches connected through respective connecting bus bars to one end of said circuit breaking portions on one side of said enclosure; main bus bars connected respectively to said disconnecting switches; insulated-led-out means connected through a connecting bus bar to the other end of said circuit breaking portions on the other side of said enclosure; conductors connected so as to extend transversely to said vertically disposed circuit breaking portions at one of the upper and lower positions of said circuit breaking portions; and insulating supporters for fixing said circuit breaking portions to said enclosure.
Claim 3
Dependent Claim
31 words
A gas-insulated switchgear equipment as set forth in claim 1 wherein the both ends of said circuit breaking portions are led out of said enclosure at substantially the same horizontal level.
Claim 4
Dependent Claim
19 words
A gas-insulated switchgear equipment as set forth in claim 1 wherein said circuit breaking portions are even in number.
Claim 5
Dependent Claim
55 words
A gas-insulated switchgear equipment as set forth in claim 3 wherein said circuit breaking portions respectively have fixed contactors at the upper portions of each of said circuit breaking portions, and said conductors are connected to said fixed contactors and are led out of said enclosure at the both ends of said circuit breaking portions.
Claim 6
Dependent Claim
61 words
A gas-insulated switchgear equipment as set forth in claim 1 wherein said circuit breaking portions comprises a pair of fixed and movable contactors, a blowing mechanism for blowing compressed gas toward an arc generated upon separation between said contactors to thereby extinguish said generated arc, and gas shields for limiting the flow of said gas after having acted on said arc.
Claim 7
Dependent Claim
108 words
A gas-insulated switchgear equipment as set forth in claim 3 wherein each of said circuit breaking portions has a fixed contactor provided at the upper position thereof and a movable contactor provided at the lower position thereof, a cylinder carrying the movable contactor, an insulated operating rod for fixedly supporting said cylinder in a relation insulated from said enclosure, and an operating device operatively coupled to said operating rod for making contact or separation between the movable and fixed contactors when the movable contactor is moved upward or downward, and wherein said conductors are led out of the enclosure at the both ends of said circuit breaking portions.
Claim 8
Dependent Claim
43 words
A gas-insulated switchgear equipment as set forth in claim 5 wherein said circuit breaking portions include two breaking points and the circuit breaking portions are arranged so that a spacing between their fixed contactors is wider than a spacing between their movable contactors.
Claim 9
Dependent Claim
51 words
A gas-insulated switchgear equipment as set forth in claim 1 wherein one end of said circuit breaking portions on the side of said main bus bars is lower than the other end of the breaking portions on the side of said insulated-led-out means to lead said conductors out of said enclosure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |