JP2020043717A - Solid insulated switchgear - Google Patents

Solid insulated switchgear Download PDF

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JP2020043717A
JP2020043717A JP2018171054A JP2018171054A JP2020043717A JP 2020043717 A JP2020043717 A JP 2020043717A JP 2018171054 A JP2018171054 A JP 2018171054A JP 2018171054 A JP2018171054 A JP 2018171054A JP 2020043717 A JP2020043717 A JP 2020043717A
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grounding
rack
pedestal
grounding device
ground
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JP6988749B2 (en
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佐藤　聡
Satoshi Sato
聡 佐藤
康之 小嶋
Yasuyuki Kojima
康之 小嶋
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Meidensha Electric Manufacturing Co Ltd
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Abstract

To reduce the number of components of a grounding device without largely changing the structure of the grounding device.SOLUTION: A solid insulated switchgear is provided that comprises a grounding device 1. The grounding device 1 includes grounded copper bands 3 (grounding conductors; the same hereinafter) respectively provided in a manner attachable to/detachable from three-phase contacts 2. The ground copper band 3 is supported by a pedestal 5 via an insulating collar 4. At the end of the ground copper band 3 on the pedestal 5 side, a ground copper band 7 (connection conductor; the same hereinafter) is provided, and the ground copper bands 3 are electrically connected to each other through the ground copper band 7. A rack 8 is provided in the pedestal 5 so as to be parallel to the extending direction of the ground copper band 3. A pinion 10 is engaged with the rack 8. The pinion 10 is rotated by a motor 11, and the rack 8 and the ground copper band 3 are moved up and down to perform a grounding on/off operation.SELECTED DRAWING: Figure 1

Description

本発明は、接地装置を備える固体絶縁開閉装置に関する。   The present invention relates to a solid insulated switchgear provided with a grounding device.

開閉装置には、充電部を樹脂でモールドして絶縁した固体絶縁開閉装置がある（例えば、特許文献１）。固体絶縁開閉装置は、充電部を樹脂であるレジンでモールドした部分や、真空インタラプタを操作する操作部等を備える。   As a switchgear, there is a solid insulated switchgear in which a charging unit is molded and insulated with a resin (for example, Patent Document 1). The solid insulated switchgear includes a portion in which a charging unit is molded with a resin that is a resin, an operation unit that operates a vacuum interrupter, and the like.

図３に示すように、固体絶縁開閉装置１２は、固定部１３と可動部１４を備える。可動部１４には、車輪１５が設けられ、可動部１４の搬出、搬入が可能となっている。また、固体絶縁開閉装置１２には、接地装置１６が備えられる。接地装置１６は、例えば、真空インタラプタ１７とケーブル１８を電気的に接続する導体１９の接地の入り切りを行う。   As shown in FIG. 3, the solid insulated switchgear 12 includes a fixed unit 13 and a movable unit 14. The movable unit 14 is provided with wheels 15 so that the movable unit 14 can be carried out and carried in. The solid-insulated switchgear 12 is provided with a grounding device 16. The grounding device 16 turns on and off the ground of the conductor 19 that electrically connects the vacuum interrupter 17 and the cable 18, for example.

接地装置１６は、三相の導体１９にそれぞれ設けられたコンタクト２０と、コンタクト２０に離接可能に設けられる接地銅帯２１を備える。コンタクト２０は、導体１９を覆うモールド２２部に設けられる。   The grounding device 16 includes a contact 20 provided on each of the three-phase conductors 19, and a grounded copper band 21 provided detachably from the contact 20. The contact 20 is provided on the mold 22 that covers the conductor 19.

固体絶縁開閉装置１２は大きさに制限があり、接地装置１６の大きさや配置スペースもその制限を受ける。例えば、固定部１３の上部に制御用の電装等を収納する制御箱２３が設けられた固体絶縁開閉装置１２では、導体１９の下方に接地装置１６を配置するスペースを確保できず、接地装置１６は導体１９の上方（例えば、制御箱２３内）に設けられる場合がある。   The size of the solid insulated switchgear 12 is limited, and the size and arrangement space of the grounding device 16 are also limited. For example, in the solid insulated switchgear 12 in which a control box 23 for accommodating control electrical equipment and the like is provided above the fixing portion 13, a space for disposing the grounding device 16 below the conductor 19 cannot be secured, and the grounding device 16 is not provided. May be provided above the conductor 19 (for example, in the control box 23).

図４（ａ）に示すように、接地銅帯２１は、絶縁カラー２４を介して台座２５に取り付けられる。接地銅帯２１の台座２５側の端部には接地銅帯２６が取り付けられる。この接地銅帯２６により、各相の接地銅帯２１間が電気的に接続される。さらに、三相一括で接地するため、中相の接地銅帯２１には、ねじ軸２７が備えられる。   As shown in FIG. 4A, the ground copper strip 21 is attached to the pedestal 25 via the insulating collar 24. A grounding copper strip 26 is attached to an end of the grounding copper strip 21 on the pedestal 25 side. The ground copper strip 26 electrically connects the ground copper strips 21 of each phase. Further, the screw shaft 27 is provided on the middle-phase grounded copper strip 21 to ground all three phases at once.

図４（ｂ）、（ｃ）に示すように、モータ２８が回転すると、モータ２８に取り付けられている歯車２９が回転し、歯車２９と係り合っている歯車３０が回転する。歯車３０の内側には、ねじが切られており、この歯車３０には、中相の接地銅帯２１のねじ軸２７が係り合っている。したがって、歯車３０が回転すると、中相の接地銅帯２１が上下に動作する。これにより、三相の接地銅帯２１が上下動し、接地の入り切りが行われる。   As shown in FIGS. 4B and 4C, when the motor 28 rotates, the gear 29 attached to the motor 28 rotates, and the gear 30 associated with the gear 29 rotates. The inside of the gear 30 is threaded, and the screw shaft 27 of the middle-phase grounded copper strip 21 is engaged with the gear 30. Therefore, when the gear 30 rotates, the middle-phase grounded copper strip 21 moves up and down. As a result, the three-phase grounded copper strip 21 moves up and down, and the ground is turned on and off.

また、三相一括の接地銅帯２１が上下に動作するとき、台座２５（および、接地銅帯２１）は、中相の接地銅帯２１を中心に回転力を受ける。そのため、台座２５（および、接地銅帯２１）が回転しないように、ガイド軸３１が取り付けられる。これにより、台座２５（および、接地銅帯２１）は、回転することなく上下運動する。   Also, when the three-phase collective grounding copper band 21 moves up and down, the pedestal 25 (and the grounding copper band 21) receives a rotational force around the middle-phase grounding copper band 21. Therefore, the guide shaft 31 is attached so that the pedestal 25 (and the ground copper strip 21) does not rotate. Accordingly, the pedestal 25 (and the ground copper strip 21) moves up and down without rotating.

特開平０９−２４５５８５号公報JP-A-09-245585 特開平０３−２１５１０５号公報JP-A-03-215105

従来の接地装置は、中相の接地銅帯を中心に歯車とねじ軸により接地銅帯を動作させるため、スムーズに動作させるためには、歯車およびねじ軸にグリースを塗布する必要がある。この場合、グリースがコンタクトに落ちるおそれがあり、グリースの塗布の量を制限する必要がある。   In the conventional grounding device, the ground copper band is operated by the gear and the screw shaft centering on the middle-phase ground copper band. Therefore, to operate smoothly, it is necessary to apply grease to the gear and the screw shaft. In this case, the grease may fall on the contact, and it is necessary to limit the amount of grease applied.

また、中相の接地銅帯はねじ軸となるため、他の相の接地銅帯とは別の部品となり、部品点数が増加する。   In addition, since the middle-phase grounded copper band is a screw shaft, it is a separate component from the other-phase grounded copper band, and the number of components increases.

また、特許文献２のように、主回路導体にラックを取り付け、各ピニオンとラックを係り合わせ、動作させた場合、ピニオンやラックも充電部となり、絶縁の影響を受けるため、導体内部にピニオン・ラックが取り付けられる。そのため、導体サイズが大きくなる。さらに、接地装置の動作は三相一括であるが、操作機構が各相に分かれているため、部品点数が多くなる。   Further, as in Patent Document 2, when a rack is attached to a main circuit conductor, and each pinion and the rack are engaged and operated, the pinion and the rack also become a charged part and are affected by insulation. A rack is attached. Therefore, the conductor size increases. Further, the operation of the grounding device is a three-phase operation, but since the operation mechanism is divided into each phase, the number of parts increases.

本発明は、上記事情に鑑みてなされたものであり、接地装置の構造を大きく変更することなく、接地装置の部品点数を削減することを目的としている。   The present invention has been made in view of the above circumstances, and has as its object to reduce the number of components of a grounding device without largely changing the structure of the grounding device.

上記目的を達成する本発明の固体絶縁開閉装置の一態様は、
接地装置を備える固体絶縁開閉装置であって、
前記接地装置は、
三相のコンタクトに離接可能にそれぞれ設けられる複数の接地導体と、
前記複数の接地導体間を電気的に接続する接続導体と、
前記接地導体を支持する台座と、
前記接地導体の延在方向と平行となるように、前記台座に設けられるラックと、
前記ラックに係合するピニオンと、
前記ピニオンを回転させるモータと、を備えたことを特徴としている。 One embodiment of the solid insulated switchgear of the present invention that achieves the above object,
A solid insulated switchgear having a grounding device,
The grounding device,
A plurality of ground conductors each provided detachably to the three-phase contact,
A connection conductor for electrically connecting the plurality of ground conductors,
A pedestal supporting the ground conductor,
A rack provided on the pedestal so as to be parallel to an extending direction of the ground conductor,
A pinion engaging the rack;
And a motor for rotating the pinion.

以上の発明によれば、接地装置の構造を大きく変更することなく、接地装置の部品点数を削減することができる。   According to the above invention, the number of components of the grounding device can be reduced without largely changing the structure of the grounding device.

（ａ）本発明の実施形態に係る固体絶縁開閉装置に備えられた接地装置の概略を示す正面図、（ｂ）同接地装置を側面方向から見た模式図である。(A) It is the front view which shows the outline of the earthing | grounding apparatus provided in the solid insulated switchgear which concerns on embodiment of this invention, (b) It is the schematic diagram which looked at the earthing | grounding apparatus from the side direction. 本発明の実施形態に係る固体絶縁開閉装置に備えられた接地装置の動作を説明する説明図であり、（ａ）接地銅帯がコンタクトと切り離された状態を示す図、（ｂ）接地銅帯がコンタクトと接続された状態を示す図である。It is explanatory drawing explaining operation | movement of the earthing | grounding apparatus with which the solid insulated switchgear which concerns on embodiment of this invention was provided, (a) The figure which shows the state which the grounding copper band was isolate | separated from the contact, (b) The grounding copper band FIG. 3 is a diagram showing a state in which is connected to a contact. 従来技術に係る固体絶縁開閉装置の概略を示す図である。It is a figure showing the outline of the solid insulation switchgear concerning a conventional technology. （ａ）従来技術に係る固体絶縁開閉装置に備えられた接地装置の概略を示す正面図、（ｂ）接地銅帯がコンタクトと接続された状態を示す断面図、（ｃ）接地銅帯がコンタクトと切り離された状態を示す断面図である。(A) A front view schematically showing a grounding device provided in a solid-insulated switchgear according to the related art, (b) a cross-sectional view showing a state where a grounded copper band is connected to a contact, and (c) a grounded copper band is a contact. It is sectional drawing which shows the state isolate | separated from.

本発明の実施形態に係る固体絶縁開閉装置について、図面に基づいて詳細に説明する。本発明の固体絶縁開閉装置は、図３に示した従来の固体絶縁開閉装置１２と、接地装置の構成が異なるものである。よって、実施形態の説明では、異なる部分である接地装置について詳細に説明する。   A solid insulated switchgear according to an embodiment of the present invention will be described in detail with reference to the drawings. The solid insulated switchgear of the present invention is different from the conventional solid insulated switchgear 12 shown in FIG. 3 in the configuration of the grounding device. Therefore, in the description of the embodiment, the grounding device which is a different part will be described in detail.

本発明の実施形態に係る固体絶縁開閉装置は、図１に示すような接地装置１を備える。接地装置１は、コンタクト２と、各コンタクト２に離接可能にそれぞれ設けられる複数の接地銅帯３を、備える。   The solid insulated switchgear according to the embodiment of the present invention includes a grounding device 1 as shown in FIG. The grounding device 1 includes a contact 2 and a plurality of grounded copper strips 3 which are provided to be detachable from the respective contacts 2.

コンタクト２は、例えば、固体絶縁開閉装置に備えられた真空インタラプタとケーブルを電気的に接続する導体（図示せず）のモールド部に設けられる。コンタクト２は、三相の導体にそれぞれ設けられる。   The contact 2 is provided, for example, in a molded part of a conductor (not shown) for electrically connecting a cable with a vacuum interrupter provided in the solid insulation switchgear. The contact 2 is provided on each of the three-phase conductors.

接地銅帯３は、三相の導体をそれぞれ接地する接地導体である。接地銅帯３は、絶縁カラー４を介して台座５に支持される。接地銅帯３の一端部を台座５に固定することで、接地銅帯３は台座５からコンタクト２方向に延在するように支持される。三相の接地銅帯３を台座５に固定することで、三相一括で接地動作が行われる。接地銅帯３は、枠６を挿通して設けられる。枠６は、例えば、固体絶縁開閉装置の制御箱２３の一部である。接地銅帯３の台座５側の端部には、接地銅帯７が設けられる。   The ground copper band 3 is a ground conductor that grounds each of the three-phase conductors. The ground copper strip 3 is supported on the pedestal 5 via the insulating collar 4. By fixing one end of the grounded copper strip 3 to the pedestal 5, the grounded copper strip 3 is supported so as to extend from the pedestal 5 in the direction of the contact 2. By fixing the three-phase grounded copper strip 3 to the pedestal 5, the grounding operation is performed collectively in three phases. The ground copper strip 3 is provided through the frame 6. The frame 6 is a part of the control box 23 of the solid insulated switchgear, for example. At the end of the ground copper strip 3 on the pedestal 5 side, a ground copper strip 7 is provided.

接地銅帯７は、三相一括で接地するために備えられる接続導体であり、三相の接地銅帯３間を電気的に接続する。また、台座５には、ラック８が備えられる。   The ground copper band 7 is a connection conductor provided for grounding the three phases collectively, and electrically connects the three-phase ground copper bands 3. The pedestal 5 is provided with a rack 8.

ラック８は、接地銅帯３の延在方向と平行となるように台座５に備えられる。ラック８は、例えば、平板状の棒に歯切りをしたものであり、枠６に取り付けられた一対の取付板９の間に備えられる。ラック８の一端は、例えば、ボルト等により台座５の側部に固定される。ラック８には、ピニオン１０が係合される。ピニオン１０は、例えば、円形歯車であり、減速機付きのモータ１１に取り付けられる。モータ１１は、ボルト等により取付板９に固定される。   The rack 8 is provided on the pedestal 5 so as to be parallel to the extending direction of the ground copper strip 3. The rack 8 is formed, for example, by cutting a flat bar into gears, and is provided between a pair of mounting plates 9 mounted on the frame 6. One end of the rack 8 is fixed to a side portion of the pedestal 5 by, for example, a bolt or the like. A pinion 10 is engaged with the rack 8. The pinion 10 is, for example, a circular gear, and is attached to a motor 11 with a speed reducer. The motor 11 is fixed to the mounting plate 9 by bolts or the like.

ラック８とピニオン１０は、モータ１１の回転力を直線の動きに変換するものである。図２に示すように、モータ１１が回転すると、モータ１１に取り付けられているピニオン１０が回転し、ピニオン１０と係り合っているラック８が上下に動作する。そして、ラック８の上下の動作に応じて台座５に取り付けられている接地銅帯３が上下に動作する。これにより、接地銅帯３の端部がコンタクト２に接触または離隔されることにより、接地の入り切りの動作が行われる。接地の入り切りの動作の際、ラック８とピニオン１０が係り合った構造（いわゆる、ラック−ピニオン構造）により、台座５（および接地銅帯３）の回転が防止される。   The rack 8 and the pinion 10 convert the torque of the motor 11 into a linear motion. As shown in FIG. 2, when the motor 11 rotates, the pinion 10 attached to the motor 11 rotates, and the rack 8 associated with the pinion 10 moves up and down. Then, the copper ground strip 3 attached to the pedestal 5 moves up and down according to the up and down movement of the rack 8. As a result, the end of the grounded copper strip 3 comes into contact with or is separated from the contact 2, thereby performing an on / off operation of grounding. At the time of turning on and off the ground, the structure in which the rack 8 and the pinion 10 are engaged (so-called rack-pinion structure) prevents the rotation of the pedestal 5 (and the grounded copper strip 3).

以上のような、本発明の実施形態に係る固体絶縁開閉装置の接地装置１によれば、主回路側で歯車の動作を行わないため、歯車の摩耗による切粉が主回路に落ちない。また、歯車、ねじ軸のグリースも主回路に落ちることがない。具体的に説明すると、接地装置１を接地対象の上方（例えば、固体絶縁開閉装置の制御室内）に備えることで、主回路側に歯車の摩耗による切粉等が落ちることが抑制される。また、ラック８とピニオン１０の係合部分をコンタクト２と接地銅帯３の延長上に配置しないことで、歯車の摩耗等による切粉やグリースがコンタクト２に落ちることが抑制される。   According to the grounding device 1 of the solid insulated switchgear according to the embodiment of the present invention as described above, the operation of the gear is not performed on the main circuit side, so that chips caused by wear of the gear do not fall into the main circuit. Also, the grease of the gear and the screw shaft does not fall into the main circuit. Specifically, by providing the grounding device 1 above the grounding target (for example, in a control room of the solid-insulated switchgear), it is possible to prevent chips and the like from falling on the main circuit side due to gear wear. In addition, since the engagement portion between the rack 8 and the pinion 10 is not arranged on the extension of the contact 2 and the ground copper band 3, the chips and grease due to wear of the gears are prevented from falling on the contact 2.

そして、モータ１１から直接、ラック８やピニオン１０を操作するため、従来のねじ軸構造の場合と比較して、接地装置１の構造を大きくすることなく、大幅な部品削減が可能となる。具体的には、台座５にラック８を設けることで、三相の接地銅帯３として共通の部品の使用が可能となり、部品点数を低減することができる。   Further, since the rack 8 and the pinion 10 are directly operated by the motor 11, the number of parts can be significantly reduced without increasing the structure of the grounding device 1 as compared with the conventional screw shaft structure. Specifically, the provision of the rack 8 on the pedestal 5 makes it possible to use a common component as the three-phase grounded copper strip 3 and reduce the number of components.

接地装置１に備えられる接地銅帯３は径が小さいので、接地銅帯３に直接ラック−ピニオン構造を適用することが困難である。そこで、台座５にラック８を設け、ピニオン１０を介してモータ１１の動力をラック８に伝えることで、三相の接地動作を一括して行うことができる。   Since the grounding copper band 3 provided in the grounding device 1 has a small diameter, it is difficult to directly apply the rack-pinion structure to the grounding copper band 3. Therefore, the rack 8 is provided on the pedestal 5, and the power of the motor 11 is transmitted to the rack 8 via the pinion 10, so that the three-phase grounding operation can be performed collectively.

以上、具体的な実施形態を示して本発明の固体絶縁開閉装置について説明したが、本発明の固体絶縁開閉装置は、実施形態に限定されるものではなく、その特徴を損なわない範囲で適宜設計変更が可能であり、設計変更されたものも、本発明の技術的範囲に属する。   As described above, the solid insulated switchgear of the present invention has been described with reference to the specific embodiment. However, the solid insulated switchgear of the present invention is not limited to the embodiment, and is appropriately designed within a range that does not impair the characteristics thereof. Modifications are possible, and those whose design is changed also belong to the technical scope of the present invention.

例えば、本発明の固体絶縁開閉装置において、接地装置１を接地対象である導体の下方に備える態様とすることもできる。   For example, in the solid insulated switchgear of the present invention, the grounding device 1 may be provided below the conductor to be grounded.

１…接地装置
２…コンタクト
３…接地銅帯（接地導体）
４…絶縁カラー
５…台座
６…枠
７…接地銅帯（接続導体）
８…ラック
９…取付板
１０…ピニオン
１１…モータ DESCRIPTION OF SYMBOLS 1 ... Grounding device 2 ... Contact 3 ... Grounding copper band (grounding conductor)
4 insulating collar 5 pedestal 6 frame 7 grounded copper strip (connection conductor)
8 rack 9 mounting plate 10 pinion 11 motor

Claims (1)

接地装置を備える固体絶縁開閉装置であって、
前記接地装置は、
三相のコンタクトに離接可能にそれぞれ設けられる複数の接地導体と、
前記複数の接地導体間を電気的に接続する接続導体と、
前記接地導体を支持する台座と、
前記接地導体の延在方向と平行となるように、前記台座に設けられるラックと、
前記ラックに係合するピニオンと、
前記ピニオンを回転させるモータと、を備えたことを特徴とする固体絶縁開閉装置。 A solid insulated switchgear having a grounding device,
The grounding device,
A plurality of ground conductors each provided detachably to the three-phase contact,
A connection conductor for electrically connecting the plurality of ground conductors,
A pedestal supporting the ground conductor,
A rack provided on the pedestal so as to be parallel to an extending direction of the ground conductor,
A pinion engaging the rack;
And a motor for rotating the pinion.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0831273A (en) * 1994-07-21 1996-02-02 Meidensha Corp Gas insulated switchgear
JP2006042472A (en) * 2004-07-26 2006-02-09 Hitachi Ltd Grounding switch
JP2014165033A (en) * 2013-02-26 2014-09-08 Hitachi Ltd Operating section for switch
JP2015069955A (en) * 2013-10-01 2015-04-13 株式会社東芝 Operation mechanism for circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0831273A (en) * 1994-07-21 1996-02-02 Meidensha Corp Gas insulated switchgear
JP2006042472A (en) * 2004-07-26 2006-02-09 Hitachi Ltd Grounding switch
JP2014165033A (en) * 2013-02-26 2014-09-08 Hitachi Ltd Operating section for switch
JP2015069955A (en) * 2013-10-01 2015-04-13 株式会社東芝 Operation mechanism for circuit breaker

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