Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
JP6988749B2 - Solid insulation switchgear - Google Patents
[go: Go Back, main page]

JP6988749B2 - Solid insulation switchgear - Google Patents

Solid insulation switchgear Download PDF

Info

Publication number
JP6988749B2
JP6988749B2 JP2018171054A JP2018171054A JP6988749B2 JP 6988749 B2 JP6988749 B2 JP 6988749B2 JP 2018171054 A JP2018171054 A JP 2018171054A JP 2018171054 A JP2018171054 A JP 2018171054A JP 6988749 B2 JP6988749 B2 JP 6988749B2
Authority
JP
Japan
Prior art keywords
grounding
copper strip
solid
rack
pedestal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2018171054A
Other languages
Japanese (ja)
Other versions
JP2020043717A (en
Inventor
聡 佐藤
康之 小嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Original Assignee
Meidensha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meidensha Corp filed Critical Meidensha Corp
Priority to JP2018171054A priority Critical patent/JP6988749B2/en
Publication of JP2020043717A publication Critical patent/JP2020043717A/en
Application granted granted Critical
Publication of JP6988749B2 publication Critical patent/JP6988749B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Gas-Insulated Switchgears (AREA)

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 including 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。 The switchgear includes a solid insulating switchgear in which a charging portion is molded with a resin to insulate (for example, Patent Document 1). The solid-state insulation switchgear includes a portion in which the charging portion is molded with a resin resin, an operation portion for operating 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-state insulated switchgear 12 includes a fixed portion 13 and a movable portion 14. Wheels 15 are provided on the movable portion 14, and the movable portion 14 can be carried in and out. Further, the solid insulation switchgear 12 is provided with a grounding device 16. The grounding device 16 turns on and off the grounding 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 grounding copper band 21 provided on the contact 20 so as to be detachable from each other. The contact 20 is provided on the mold 22 portion 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 placement space of the grounding device 16 are also limited. For example, in the solid insulating switchgear 12 provided with the control box 23 for accommodating the electrical equipment for control in the upper part of the fixing portion 13, the space for arranging the grounding device 16 below the conductor 19 cannot be secured, and the grounding device 16 cannot be secured. May be provided above the conductor 19 (eg, inside 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 grounding copper strip 21 is attached to the pedestal 25 via the insulating collar 24. A grounding copper strip 26 is attached to the end of the grounding copper strip 21 on the pedestal 25 side. The grounding copper strip 26 electrically connects the grounding copper strips 21 of each phase. Further, in order to ground the three phases at once, the grounding copper strip 21 of the middle phase is provided with a screw shaft 27.

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. 4 (b) and 4 (c), when the motor 28 rotates, the gear 29 attached to the motor 28 rotates, and the gear 30 engaged with the gear 29 rotates. A thread is cut on the inside of the gear 30, and the screw shaft 27 of the ground copper strip 21 of the middle phase is engaged with the gear 30. Therefore, when the gear 30 rotates, the grounding copper strip 21 in the middle phase moves up and down. As a result, the three-phase grounding copper strip 21 moves up and down, and the grounding 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。 Further, when the three-phase collective grounding copper strip 21 operates up and down, the pedestal 25 (and the grounding copper strip 21) receives a rotational force around the grounding copper strip 21 of the middle phase. Therefore, the guide shaft 31 is attached so that the pedestal 25 (and the grounding copper strip 21) does not rotate. As a result, the pedestal 25 (and the grounding copper strip 21) moves up and down without rotating.

特開平09−245585号公報Japanese Unexamined Patent Publication No. 09-245585 特開平03−215105号公報Japanese Unexamined Patent Publication No. 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 grounding copper strip is operated by the gear and the screw shaft around the grounding copper strip of the middle phase. Therefore, in order 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 contacts, 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。 Further, since the grounding copper strip in the middle phase is a screw shaft, it becomes a separate component from the grounding copper strip in the other phase, and the number of parts 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 the main circuit conductor and each pinion and the rack are engaged and operated, the pinion and the rack also become a charging part and are affected by insulation. The rack is installed. Therefore, the conductor size becomes large. Further, although the operation of the grounding device is a three-phase batch, the number of parts increases because the operation mechanism is divided into each phase.

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 an object of the present invention is to reduce the number of parts of the grounding device without significantly 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 aspect of the solid-state insulated switchgear of the present invention that achieves the above object is
A solid insulated switchgear equipped with a grounding device,
The grounding device is
Multiple grounding conductors that can be detached from each of the three-phase contacts,
A connecting conductor that electrically connects the plurality of grounding conductors,
The pedestal that supports the ground conductor and
With the rack provided on the pedestal so as to be parallel to the extending direction of the ground conductor.
The pinion that engages the rack and
It is characterized by being provided with 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 parts of the grounding device can be reduced without significantly 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) is a front view showing the outline of the grounding device provided in the solid insulation switchgear according to the embodiment of the present invention, and (b) is a schematic view of the grounding device as viewed from the side. 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 the operation of the grounding apparatus provided in the solid insulation switchgear which concerns on embodiment of this invention, (a) the figure which shows the state which the grounding copper band was separated from the contact, (b) the grounding copper band. 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 which shows the outline of the solid insulation switchgear which concerns on a prior art. (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) Front view showing the outline of the grounding device provided in the solid insulating switchgear according to the prior art, (b) Cross-sectional view showing the state where the grounding copper band is connected to the contact, (c) The grounding copper band is the contact. It is sectional drawing which shows the state 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。 The solid insulated switchgear according to the embodiment of the present invention will be described in detail with reference to the drawings. The solid-insulated switchgear of the present invention has a different configuration of the grounding device from the conventional solid-insulated switchgear 12 shown in FIG. 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-state 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 grounding copper strips 3 provided so as to be detachable from each contact 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 portion of a conductor (not shown) that electrically connects a vacuum interrupter and a cable provided in a solid-state insulated switchgear. The contacts 2 are provided on the three-phase conductors, respectively.

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 grounding copper strip 3 is a grounding conductor that grounds each of the three-phase conductors. The grounding copper strip 3 is supported by the pedestal 5 via the insulating collar 4. By fixing one end of the grounding copper strip 3 to the pedestal 5, the grounding copper strip 3 is supported so as to extend from the pedestal 5 in the contact 2 direction. By fixing the three-phase grounding copper strip 3 to the pedestal 5, the three-phase grounding operation is performed collectively. The grounding copper strip 3 is provided by inserting the frame 6. The frame 6 is, for example, a part of the control box 23 of the solid-state insulated switchgear. A grounding copper strip 7 is provided at the end of the grounding copper strip 3 on the pedestal 5 side.

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 grounding copper strip 7 is a connecting conductor provided for grounding all three phases at once, and electrically connects the three-phase grounding copper strips 3. Further, 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 grounding copper strip 3. The rack 8 is, for example, a flat plate-shaped rod with teeth cut, and is provided between a pair of mounting plates 9 mounted on the frame 6. One end of the rack 8 is fixed to the side of the pedestal 5 by, for example, a bolt or the like. The 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 with 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 rotational force 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 engaged with the pinion 10 moves up and down. Then, the grounding copper 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 portion of the grounding copper strip 3 comes into contact with or separated from the contact 2, so that the grounding operation is performed. The structure in which the rack 8 and the pinion 10 are engaged (so-called rack-pinion structure) prevents the pedestal 5 (and the grounding copper strip 3) from rotating during the on / off operation of grounding.

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-state insulated switchgear according to the embodiment of the present invention as described above, since the gears are not operated on the main circuit side, chips due to wear of the gears do not fall on the main circuit. In addition, grease on gears and screw shafts does not fall into the main circuit. Specifically, by providing the grounding device 1 above the grounding target (for example, the control chamber of the solid-state insulating switchgear), it is possible to prevent chips and the like from falling due to wear of the gears on the main circuit side. Further, by not arranging the engaging portion between the rack 8 and the pinion 10 on the extension of the contact 2 and the grounding copper strip 3, it is possible to prevent chips and grease from falling to the contact 2 due to wear of the gear or the like.

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。 Since the rack 8 and the pinion 10 are operated directly from the motor 11, it is possible to significantly reduce the number of parts without enlarging the structure of the grounding device 1 as compared with the case of the conventional screw shaft structure. Specifically, by providing the rack 8 on the pedestal 5, common parts can be used as the three-phase grounding copper strip 3, and the number of parts can be reduced.

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 strip 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 strip 3. Therefore, by providing the rack 8 on the pedestal 5 and transmitting the power of the motor 11 to the rack 8 via the pinion 10, 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。 Although the solid-insulated switchgear of the present invention has been described above by showing a specific embodiment, the solid-insulated switchgear of the present invention is not limited to the embodiment and is appropriately designed as long as its characteristics are not impaired. Changes are possible, and those whose designs have been 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 insulation 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
1 ... Grounding device 2 ... Contact 3 ... Grounding copper band (grounding conductor)
4 ... Insulation color 5 ... Pedestal 6 ... Frame 7 ... Grounding copper band (connecting 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 equipped with a grounding device,
The grounding device is
Multiple grounding conductors that can be detached from each of the three-phase contacts,
A connecting conductor that electrically connects the plurality of grounding conductors,
The pedestal that supports the ground conductor and
With the rack provided on the pedestal so as to be parallel to the extending direction of the ground conductor.
The pinion that engages the rack and
A solid-insulated switchgear comprising a motor for rotating the pinion.
JP2018171054A 2018-09-13 2018-09-13 Solid insulation switchgear Active JP6988749B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018171054A JP6988749B2 (en) 2018-09-13 2018-09-13 Solid insulation switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018171054A JP6988749B2 (en) 2018-09-13 2018-09-13 Solid insulation switchgear

Publications (2)

Publication Number Publication Date
JP2020043717A JP2020043717A (en) 2020-03-19
JP6988749B2 true JP6988749B2 (en) 2022-01-05

Family

ID=69798986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018171054A Active JP6988749B2 (en) 2018-09-13 2018-09-13 Solid insulation switchgear

Country Status (1)

Country Link
JP (1) JP6988749B2 (en)

Family Cites Families (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
JP4382601B2 (en) * 2004-07-26 2009-12-16 株式会社日立製作所 Ground switch
JP5894946B2 (en) * 2013-02-26 2016-03-30 株式会社日立製作所 Switch operation part
JP6204778B2 (en) * 2013-10-01 2017-09-27 株式会社東芝 Switch operating mechanism

Also Published As

Publication number Publication date
JP2020043717A (en) 2020-03-19

Similar Documents

Publication Publication Date Title
CN1213527C (en) Gas Insulated Switchgear
EP2715758B1 (en) Grounding switch
CN100458997C (en) Spindle drive for a disconnecting switch and/or earthing switch
EP2543121B1 (en) A switch arrangement for an electrical switchgear
CN203966948U (en) A kind of three station isolation grounding switchs
JP7261295B2 (en) Fast earthing switch for gas insulated switchgear
JP2015023685A (en) Switchgear
CN101034642A (en) Vacuum insulated switch gear
US20150244156A1 (en) Integrated compact bushing structure combining the functionality of primary contact with a current transformer primary conductor and a post insulator
JP6988749B2 (en) Solid insulation switchgear
US8624146B2 (en) Metal-encapsulated, gas-insulated, combined switch disconnector and earthing switch
JP4459236B2 (en) Compressed gas insulation disconnector unit and bushing device
EP3098915A1 (en) Gas-insulated switchgear and switch
CN106960758A (en) A kind of switch cubicle and its switching device
JP2009021124A (en) Vacuum circuit breaker
US9270093B2 (en) Compact medium voltage air insulated switchgear using rear mounted current transformers and bushings of different length
WO2016034088A1 (en) Composite combined electric appliance
US20190304719A1 (en) Switching Device With Dual Conductive Housing
CN203521276U (en) Line-shaped rapid grounding switching device
CA2775458A1 (en) Insulating cap for an end winding of an electrical machine working at high voltage and machine having such an insulating cap
CN1910800A (en) Compressed-gas insulation switching device
CN201315254Y (en) Five-station change-over switch
KR20130005577U (en) Gas insulated switchgear
CN215452305U (en) A vertical gas-insulated metal-enclosed switchgear
KR102171601B1 (en) Electrode driving apparatus for gas insulated switchgear

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210203

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20211006

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20211102

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20211115

R150 Certificate of patent or registration of utility model

Ref document number: 6988749

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150