WO2010150390A1 - ガス絶縁開閉装置 - Google Patents
ガス絶縁開閉装置 Download PDFInfo
- Publication number
- WO2010150390A1 WO2010150390A1 PCT/JP2009/061650 JP2009061650W WO2010150390A1 WO 2010150390 A1 WO2010150390 A1 WO 2010150390A1 JP 2009061650 W JP2009061650 W JP 2009061650W WO 2010150390 A1 WO2010150390 A1 WO 2010150390A1
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- WIPO (PCT)
- Prior art keywords
- fixed
- arc
- shield
- insulated switchgear
- movable
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
- H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/187—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet comprising a hollow annular arc runner and a central contact between which a radially drawn arc rotates
Definitions
- the present invention relates to a gas-insulated switchgear used in power plants, substations, and the like.
- a fixed main contactor and a movable main contactor that can be brought into and out of contact with a metal container filled with an insulating gas, and are electrically connected to the fixed main contactor and fixed to the fixed main contactor.
- the fixed-side arc contact, and the movable-side arc contact that is electrically connected to the movable-side main contact and fixed to the distal end side of the movable-side main contact, and is capable of contacting and separating from the fixed-side arc contact
- a gas-insulated switch in which an electric field shielding shield is disposed outside the fixed side main contact and the fixed side arc contact, wherein the electric field shielding shield is the fixed side main contact
- An arc resistant member formed and threaded on the support member side, and
- the fixed-side electrode portion and the movable-side electrode portion are disposed opposite to each other in a container filled with an insulating gas, and the fixed-side electrode portion includes a fixed-side energization contact formed in a cylindrical shape and the fixed-side energization.
- a fixed-side arc contact that is arranged at the center of the contact and generates an arc when the electrode is opened; and a fixed-side shield that is arranged around the fixed-side energized contact.
- a gas-insulated switchgear having a movable contact that is driven to come into contact with and away from the fixed energized contact, on the side facing the movable electrode portion of the fixed shield, the diameter is larger than the outer diameter of the movable contact
- a gas insulated switchgear in which an annular fixed-side arc shield having a plurality of opening holes is provided, and a plurality of permanent magnets having the same shape are embedded in the circumferential direction in the vicinity of the opening holes of the fixed-side arc shield.
- the present invention has been made in view of the above, and an object of the present invention is to obtain an inexpensive gas-insulated switchgear that can prevent arc diffusion and reduce the outer diameter of the electrode.
- the present invention provides a fixed electrode and a movable electrode facing each other in a container filled with an insulating gas, and the fixed electrode is cylindrical.
- a fixed-side energizing contact formed on the fixed-side energizing contact, and a fixed-side shield that accommodates the fixed-side energizing contact.
- a gas-insulated switchgear having an opening larger in diameter than the outer diameter of the movable conductor on the side of the stationary shield facing the movable electrode, and when the stationary conductor and the movable conductor are open.
- An arc-resistant member that restrains the arc in the vicinity of the opening by causing an arc current to flow radially outward to generate a circumferential magnetic flux on the surface, applying a force to the arc in a central axis direction by the magnetic flux;
- a thin disk-shaped solid consisting of Characterized in that a side arc shield.
- the gas insulated switchgear according to the present invention can prevent arc diffusion, reduce the outer diameter of the electrode, and can be manufactured at low cost.
- FIG. 1-1 is a sectional view showing Embodiment 1 of a gas insulated switchgear according to the present invention.
- 1-2 is a partial cross-sectional view showing a detailed shape of a fixed-side arc shield of the gas-insulated switchgear according to Embodiment 1.
- FIG. 1-3 is a partial cross-sectional view of a fixed-side arc shield of a conventional gas insulated switchgear shown as a comparative example.
- FIG. 1-4 is a partial cross-sectional view of a fixed-side arc shield of another gas insulated switchgear shown as a comparative example.
- FIG. 2 is a sectional view showing Embodiment 2 of the gas insulated switchgear according to the present invention.
- FIG. 3 is a sectional view showing Embodiment 3 of the gas insulated switchgear according to the present invention.
- FIG. 4 is a sectional view showing Embodiment 4 of the gas insulated switchgear according to the present invention.
- FIG. 5 is a sectional view showing Embodiment 5 of the gas insulated switchgear according to the present invention.
- FIG. 6 is a sectional view showing Embodiment 6 of the gas insulated switchgear according to the present invention.
- FIG. 7-1 is a sectional view showing Embodiment 7 of the gas insulated switchgear according to the present invention.
- FIG. 7-2 is a view taken along the line AA in FIG.
- FIG. 1-1 is a sectional view showing Embodiment 1 of a gas insulated switchgear according to the present invention
- FIG. 1-2 shows a detailed shape of a fixed side arc shield of the gas insulated switchgear according to Embodiment 1.
- FIG. FIG. 1-3 is a partial cross-sectional view of a fixed-side arc shield of a conventional gas-insulated switchgear shown as a comparative example
- FIG. 1-4 is another gas-insulated switchgear shown as a comparative example. It is a fragmentary sectional view of the fixed side arc shield of an apparatus.
- a fixed side electrode 10 and a movable side electrode 20 of a gas insulated switchgear 91 that cuts off a current are placed in a drive axis (center) in a container (not shown) filled with an insulating gas having high arc extinguishing performance. Axis) is placed oppositely and accommodated.
- the fixed side electrode 10 is formed in a cylindrical shape and is made of a copper fixed side energizing contact 11 that conducts current, an aluminum cylindrical fixed side shield 12 that accommodates the fixed side energizing contact 11, and the movable of the fixed side shield 12.
- a thin disk-shaped fixed side arc shield 13 made of an arc resistant member (for example, copper-tungsten alloy) provided on the side facing the side electrode 20.
- the fixed side arc shield 13 and the fixed side shield 12 are fixed by screwing or brazing. Details of the fixed-side arc shield 13 will be described later.
- the movable side electrode 20 is driven by a driving device (not shown) to come into contact with the inner side of the cylindrical fixed side energizing contact 11, and the movable conductor 21 is inserted into the copper.
- the cylindrical movable side energizing contact 24 and an aluminum movable side shield 25 that accommodates the movable side energizing contact 24 are provided.
- the movable conductor 21 has a cylindrical sliding contact 21b made of copper and an annular movable-side arc contact 21a made of an arc resistant member fixed to the tip of the sliding contact 21b by brazing or the like.
- An opening 13x having a diameter slightly larger than the outer diameter of the movable conductor 21 is formed at the center of the thin disk-shaped fixed-side arc shield 13.
- the opening 13x is formed in a short cylindrical shape by press-drawing and drawing a center portion of a thin disk.
- the function of the fixed-side arc shield 13 in the gas-insulated switchgear 91 according to the first embodiment is such that when the fixed-side energizing contact 11 and the movable conductor 21 are opened, the thin disk-shaped fixed-side arc shield 13 faces radially outward.
- An arc current I is applied to generate a strong magnetic flux in the circumferential direction on the surface, a force is applied to the arc 30 in the central axis direction by the magnetic flux, and the arc 30 is restrained in the vicinity of the opening 13x.
- a circumferential magnetic flux B is generated by the arc current I.
- the magnetic flux B faces the clockwise direction on the front side of the fixed side arc shield 13 as viewed from the movable side electrode 20 side, and faces the counterclockwise direction on the back side. Due to the magnetic flux B on the front side of the fixed-side arc shield 13, a force F in the central axis direction acts on the arc 30, and the arc 30 can be restrained in the vicinity of the opening 13x.
- the magnetic flux density Br at the arc attachment position X on the surface of the fixed-side arc shield 13 can be obtained by the following formula (1).
- Br ⁇ 0 I / 2 ⁇ r
- Br Magnetic flux density
- ⁇ 0 Permeability
- I Arc current
- Equation (1) the thinner the plate thickness 2r of the fixed-side arc shield 13, the larger the magnetic flux density Br, and the stronger force F in the central axis direction acts on the arc 30.
- the plate thickness 2s is thick as in the conventional fixed-side arc shield 13j shown in FIG. 1-3, the magnetic flux density Bs at the arc attachment position X on the surface of the fixed-side arc shield 13j is small, and the binding force is not applied to the arc 30. Does not work.
- the diameter of the fixed-side arc shield 13 having a small plate thickness is increased to increase the energization path length, and the plate thickness is decreased to reduce the energization cross-sectional area as much as possible.
- the region where the average distance r of the current to the arc attachment position Y is small can be lengthened, the region where the magnetic flux density Br is large can be widened, and the constrained region of the arc 30 can be widened.
- the magnetic flux region that restrains the arc 30 is narrowed.
- the energization cross-sectional area is increased as in the case of the side shield 12t, the average distance t of the current to the arc attachment position Y is increased, the magnetic flux density Bt is decreased, and the arc 30 cannot be restrained.
- the arc 30 is constrained in the vicinity of the opening 13x, so the plate thickness of the constrained region of the arc 30 of the fixed side arc shield 13 is obtained by the following formula (2).
- the thickness is determined in consideration of the wear amount of the arc resistant member during the design life of the gas insulated switchgear 91.
- V ⁇ ⁇ (Is) ⁇ ⁇ t (2)
- the plate thickness around the restricted region of the arc 30 of the fixed-side arc shield 13 is set to a plate thickness (energization cross-sectional area) that can be thermally endured even when an arc current I obtained by the following formula (3) flows.
- A Current-carrying cross-sectional area of the fixed-side arc shield 13 (mm 2 )
- I Arc current (A)
- S Arc current conduction time (seconds)
- t Allowable temperature rise value (° C) against fusing of arc resistant member
- the arc 30 can be prevented from spreading, and the thickness of the fixed-side arc shield 13 made of an expensive arc-resistant member is reduced. An inexpensive gas insulated switchgear 91 is obtained.
- FIG. FIG. 2 is a sectional view showing Embodiment 2 of the gas insulated switchgear according to the present invention.
- the gas-insulated switchgear 92 according to the second embodiment is different from the gas-insulated switchgear 91 according to the first embodiment in the form of the fixed-side arc shield 13 b, and the other portions are not different.
- the fixed-side arc shield 13b according to the second embodiment has a central portion 13t made of an arc-resistant member that has an opening 13x and the arc 30 adheres to, and the arc 30 hardly adheres, and is as inexpensive as the fixed-side shield 12. It is made of a material and has an annular peripheral portion 13 s that connects the central portion 13 t and the fixed shield 12.
- the fixed-side arc shield 13b of the second embodiment can be manufactured at a lower cost since there are few places where expensive arc-resistant members are used.
- FIG. 3 is a sectional view showing Embodiment 3 of the gas insulated switchgear according to the present invention.
- the gas-insulated switchgear 93 according to the third embodiment is different from the gas-insulated switchgear 92 according to the second embodiment in the form of the fixed shield 12c, and there is no difference in other parts.
- the fixed-side shield 12c according to the third embodiment has a smaller outer diameter than the fixed-side shield 12 according to the first and second embodiments. Further, the outer peripheral portion of the fixed shield 12c and the connection portion with the fixed arc shield 13c made of an arc resistant member at the front end facing the movable electrode 20 are covered with an insulating member 14 such as epoxy resin.
- the fixed-side arc shield 13c of the third embodiment has the same size as the central portion 13t of the fixed-side arc shield 13b of the second embodiment.
- the fixed-side shield 12c according to the third embodiment is covered with the insulating member 14, and the insulation is improved, so that the arc 30 is difficult to adhere, so the outer diameter can be reduced.
- FIG. 4 is a sectional view showing Embodiment 4 of the gas insulated switchgear according to the present invention.
- the gas insulated switchgear 94 according to the fourth embodiment differs from the gas insulated switchgear 93 according to the third embodiment in that the permanent magnet 15 is disposed on the back side of the fixed-side arc shield 13c. The part is not different.
- a permanent magnet 15 is annularly arranged on the back side in the vicinity of the opening 13x of the fixed-side arc shield 13c of the fourth embodiment.
- An insulating sheet 17 is inserted between the permanent magnet 15 and the fixed-side arc shield 13 c, and the permanent magnet 15 is fixed by a presser plate 16.
- the gas insulated switchgear 94 of the fourth embodiment can increase the arc extinguishing performance by rotating the arc 30 in the circumferential direction by disposing the permanent magnet 15 in the vicinity of the attachment point of the arc 30. Further, since the arc 30 is moved in the circumferential direction by the permanent magnet 15 and damage to the fixed-side arc shield 13c is reduced, the plate thickness of the fixed-side arc shield 13c can be further reduced.
- FIG. 5 is a sectional view showing Embodiment 5 of the gas insulated switchgear according to the present invention.
- the fixed-side electrode 10e of the gas-insulated switchgear 95 according to the fifth embodiment is different from the fixed-side electrode 10d according to the fourth embodiment in the form of the fixed-side shield 12e. Absent.
- the fixed shield 12e of the fifth embodiment is not covered with the insulating member 14. Further, the outer diameter of the fixed shield 12e is larger than the outer diameter of the fixed shield 12d of the fourth embodiment, and is equal to the fixed shield 12 of the first and second embodiments.
- the gas insulated switchgear 95 according to the fifth embodiment can improve the arc extinguishing performance by rotating the arc 30 in the circumferential direction by arranging the permanent magnet 15 in the vicinity of the attachment point of the arc 30. Further, since the arc 30 is moved in the circumferential direction by the permanent magnet 15 and damage to the fixed-side arc shield 13c is reduced, the plate thickness of the fixed-side arc shield 13c can be further reduced.
- FIG. 6 is a sectional view showing Embodiment 6 of the gas insulated switchgear according to the present invention.
- the fixed-side electrode 10f of the gas-insulated switchgear 96 according to the sixth embodiment is different from the fixed-side electrode 10e according to the fifth embodiment in the form around the permanent magnet 15b, and other parts are different. Absent.
- an insulating sheet 17 and a magnetic body (magnetic plate) 18 are disposed between the fixed-side arc shield 13c and the peripheral portion 13s at the center and the permanent magnet 15b.
- the magnetic body 18 is disposed between the fixed-side arc shield 13c, the peripheral portion 13s, and the permanent magnet 15b, so that the magnetic flux density near the attachment point of the arc 30 is reduced.
- the permanent magnet 15b can be moved away from the arc 30, and the permanent magnet 15b has less thermal influence from the arc 30.
- FIG. 7-1 is a cross-sectional view showing Embodiment 7 of the gas insulated switchgear according to the present invention
- FIG. 7-2 is a view taken along the line AA in FIG.
- the fixed-side electrode 10g of the gas-insulated switchgear 97 of the seventh embodiment is different from the fixed-side electrode 10 of the first embodiment in the form of the fixed-side arc shield 13f. The other parts are not different.
- the fixed-side arc shield 13f of the seventh embodiment is provided with a plurality of radial slits 13h.
- the arc current flowing through the fixed-side arc shield 13f can be concentrated, and the magnetic flux density in the vicinity of the attachment point of the arc 30 can be increased, and the arc 30 is restrained in the vicinity of the opening 13x, A ground fault can be prevented.
- gas insulated switchgear according to the present invention is useful for use in power plants and substations.
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Abstract
Description
図1-1は、本発明にかかるガス絶縁開閉装置の実施の形態1を示す断面図であり、図1-2は、実施の形態1のガス絶縁開閉装置の固定側アークシールドの詳細形状を示す部分断面図であり、図1-3は、比較例として示す従来のガス絶縁開閉装置の固定側アークシールドの部分断面図であり、図1-4は、比較例として示す他のガス絶縁開閉装置の固定側アークシールドの部分断面図である。
Br=μ0I/2πr ・・・・・(1)
Br:磁束密度
μ0:透磁率
I :アーク電流
r :アーク付着位置までの板厚内の電流の平均距離
=固定側アークシールドの板厚の1/2
V=α・(Is)β・t ・・・・・(2)
V :損耗量
Is:遮断電流
t :アーク時間
α、β:固定側アークシールド13の材料で決まる定数
I:アーク電流(A)
S:アーク電流通電時間(秒)
t:耐アーク部材の溶断に対する許容温度上昇値(℃)
図2は、本発明にかかるガス絶縁開閉装置の実施の形態2を示す断面図である。図2に示すように、実施の形態2のガス絶縁開閉装置92は、固定側アークシールド13bの形態が実施の形態1のガス絶縁開閉装置91と異なり、他の部分は異なるところはない。
図3は、本発明にかかるガス絶縁開閉装置の実施の形態3を示す断面図である。図3に示すように、実施の形態3のガス絶縁開閉装置93は、固定側シールド12cの形態が実施の形態2のガス絶縁開閉装置92と異なり、他の部分は異なるところはない。
図4は、本発明にかかるガス絶縁開閉装置の実施の形態4を示す断面図である。図4に示すように、実施の形態4のガス絶縁開閉装置94は、固定側アークシールド13cの裏側に永久磁石15を配置したことが実施の形態3のガス絶縁開閉装置93と異なり、他の部分は異なるところはない。
図5は、本発明にかかるガス絶縁開閉装置の実施の形態5を示す断面図である。図5に示すように、実施の形態5のガス絶縁開閉装置95の固定側電極10eは、固定側シールド12eの形態が実施の形態4の固定側電極10dと異なり、他の部分は異なるところはない。
図6は、本発明にかかるガス絶縁開閉装置の実施の形態6を示す断面図である。図6に示すように、実施の形態6のガス絶縁開閉装置96の固定側電極10fは、永久磁石15b周りの形態が実施の形態5の固定側電極10eと異なり、他の部分は異なるところはない。
図7-1は、本発明にかかるガス絶縁開閉装置の実施の形態7を示す断面図であり、図7-2は、図7-1のA-A線に沿う矢視図である。図7-1及び図7-2に示すように、実施の形態7のガス絶縁開閉装置97の固定側電極10gは、固定側アークシールド13fの形態が実施の形態1の固定側電極10と異なり、他の部分は異なるところはない。
11 固定側通電接点
12、12c、12d、12e、12f 固定側シールド
13、13b、13c、13f、13j、13k 固定側アークシールド
13t 中央部(耐アーク部材製)
13s 周辺部
13x 開口
13h スリット
14 絶縁部材
15、15b 永久磁石
16、16b 押え板
17 絶縁シート
18 磁性体
20 可動側電極
21 可動導体
21a 可動側アーク接点
21b 摺動接点
24 可動側通電接点
25 可動側シールド
30 アーク
Claims (7)
- 絶縁ガスが封入された容器内に固定側電極と可動側電極とが対向して配置され、前記固定側電極は、円筒状に形成された固定側通電接点と、前記固定側通電接点を収容する固定側シールドとを有し、前記可動側電極は、駆動装置により駆動されて前記固定側通電接点に接離する可動導体を有するガス絶縁開閉装置において、
前記固定側シールドの前記可動側電極と対向する側に、前記可動導体の外径より大径の開口を有し、前記固定側通電接点と前記可動導体の開極時に径方向外側に向ってアーク電流を流して表面に周方向の磁束を発生させ、前記磁束によりアークに中心軸方向に力を作用させ、前記アークを前記開口の近傍に拘束する耐アーク部材を含んで成る薄い円板状の固定側アークシールドを設けたことを特徴とするガス絶縁開閉装置。 - 前記固定側アークシールドの中央部のみを耐アーク部材で形成したことを特徴とする請求項1に記載のガス絶縁開閉装置。
- 前記固定側シールドの外周部及び前記可動側電極に対向する前端部の耐アーク部材製の固定側アークシールドとの接続部までを絶縁部材で被覆したことを特徴とする請求項1に記載のガス絶縁開閉装置。
- 前記固定側アークシールドの開口の近傍の裏側に環状に永久磁石を配置したことを特徴とする請求項3に記載のガス絶縁開閉装置。
- 前記固定側アークシールドの開口の近傍の裏側に環状に永久磁石を配置したことを特徴とする請求項1に記載のガス絶縁開閉装置。
- 前記固定側アークシールドと前記永久磁石の間に磁性体を配置したことを特徴とする請求項5に記載のガス絶縁開閉装置。
- 前記固定側アークシールドの径方向に、複数のスリットを設けたことを特徴とする請求項1に記載のガス絶縁開閉装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980160115.4A CN102804313B (zh) | 2009-06-25 | 2009-06-25 | 气体绝缘开关装置 |
US13/320,792 US8878092B2 (en) | 2009-06-25 | 2009-06-25 | Gas-insulated switchgear |
PCT/JP2009/061650 WO2010150390A1 (ja) | 2009-06-25 | 2009-06-25 | ガス絶縁開閉装置 |
JP2009546610A JP4522490B1 (ja) | 2009-06-25 | 2009-06-25 | ガス絶縁開閉装置 |
EP09846522.2A EP2447975B1 (en) | 2009-06-25 | 2009-06-25 | Gas insulated switchgear |
Applications Claiming Priority (1)
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PCT/JP2009/061650 WO2010150390A1 (ja) | 2009-06-25 | 2009-06-25 | ガス絶縁開閉装置 |
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WO2010150390A1 true WO2010150390A1 (ja) | 2010-12-29 |
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PCT/JP2009/061650 WO2010150390A1 (ja) | 2009-06-25 | 2009-06-25 | ガス絶縁開閉装置 |
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US (1) | US8878092B2 (ja) |
EP (1) | EP2447975B1 (ja) |
JP (1) | JP4522490B1 (ja) |
CN (1) | CN102804313B (ja) |
WO (1) | WO2010150390A1 (ja) |
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JP2013164994A (ja) * | 2012-02-10 | 2013-08-22 | Toshiba Corp | ガス遮断器 |
JPWO2012093507A1 (ja) * | 2011-01-07 | 2014-06-09 | 三菱電機株式会社 | 開閉装置 |
WO2016027499A1 (ja) * | 2014-08-18 | 2016-02-25 | 三菱電機株式会社 | 開閉装置 |
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EP2741305A1 (de) * | 2012-12-07 | 2014-06-11 | ABB Technology AG | Hochspannungs-Trenner |
JP5978124B2 (ja) * | 2012-12-26 | 2016-08-24 | 株式会社日立製作所 | 開閉装置 |
JP6029524B2 (ja) * | 2013-04-22 | 2016-11-24 | 株式会社日立製作所 | 開閉装置 |
JP2014235954A (ja) * | 2013-06-05 | 2014-12-15 | 株式会社日立製作所 | ガス絶縁開閉器 |
CN111357074B (zh) * | 2017-11-10 | 2021-12-24 | 株式会社东芝 | 气体断路器 |
WO2020003347A1 (ja) * | 2018-06-25 | 2020-01-02 | 三菱電機株式会社 | ガス遮断器 |
CN109148181B (zh) * | 2018-09-12 | 2019-11-12 | 浙江润成合金材料科技有限公司 | 一种楼道控制开关 |
US11545322B2 (en) * | 2018-10-26 | 2023-01-03 | Kabushiki Kaisha Toshiba | Gas circuit breaker |
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JP2013164994A (ja) * | 2012-02-10 | 2013-08-22 | Toshiba Corp | ガス遮断器 |
WO2016027499A1 (ja) * | 2014-08-18 | 2016-02-25 | 三菱電機株式会社 | 開閉装置 |
KR101829574B1 (ko) | 2014-08-18 | 2018-02-14 | 미쓰비시덴키 가부시키가이샤 | 개폐 장치 |
Also Published As
Publication number | Publication date |
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EP2447975A4 (en) | 2014-01-01 |
CN102804313B (zh) | 2015-09-09 |
US20120061352A1 (en) | 2012-03-15 |
JPWO2010150390A1 (ja) | 2012-12-06 |
JP4522490B1 (ja) | 2010-08-11 |
EP2447975B1 (en) | 2018-07-18 |
EP2447975A1 (en) | 2012-05-02 |
US8878092B2 (en) | 2014-11-04 |
CN102804313A (zh) | 2012-11-28 |
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