JP3900510B2

JP3900510B2 - Load tap changer

Info

Publication number: JP3900510B2
Application number: JP2001075211A
Authority: JP
Inventors: 俊一小林; 太栗山; 裕孝池田
Original assignee: Takaoka Electric Mfg Co Ltd
Current assignee: Takaoka Toko Co Ltd
Priority date: 2001-03-16
Filing date: 2001-03-16
Publication date: 2007-04-04
Anticipated expiration: 2021-03-16
Also published as: JP2002280228A

Description

【０００１】
【発明の属する技術分野】
本発明は、負荷時タップ切換器に関する。
【０００２】
【従来の技術】
従来技術の負荷時タップ切換器の構成を図６から図８に示す油入変圧器の例を用いて説明する。負荷時タップ切換器は変圧器の運転中にタップを切換えることのできる装置で、図６において、変圧器の負荷に応じて任意の変圧器タップを選択するタップ選択器５と、任意の変圧器タップとそれに隣接する変圧器タップへ切換を行う際に変圧器負荷電流を遮断するための遮断部１ｂとタップ切換時のタップ間橋絡状態（隣接したタップ間を選択した状態）の循環電流を抑制する限流抵抗部３を有した切換開閉器４ｂおよび前記遮断部１ｂを駆動する蓄勢機構２と、この蓄勢機構２およびタップ選択器５へ絶縁軸２１と２２を介して動力を伝達する伝達装置１２ｂより構成され、変圧器タンク２３内に取り付けられている。
【０００３】
前記切換開閉器４ｂは、タップ切換時の変圧器負荷電流遮断で発生するカーボンにより絶縁媒体である絶縁油を汚損するので、切換開閉器４ｂと前記蓄勢機構２の周囲絶縁媒体である絶縁油を、タップ選択器５および変圧器タンク２３内の絶縁油と隔離するために、切換開閉器室１０を設け、この切換開閉器室１０内に切換開閉器４ｂと蓄勢機構２と伝達装置１２ｂを収納している。
前記切換開閉器４ｂとタップ選択器５は、遮断部１ｂの接触装置６ｂとタップ選択器５に接続された接触子８により電気的に接続され、切換開閉器４ｂと蓄勢機構２と伝達装置１２ｂの一部は点検および交換のために切換開閉器室１０内から取り外し可能な構造になっている。
また前記蓄勢機構２へ動力を伝達する伝達装置１２ｂは入力軸１３と駆動軸１４に取り付けられた伝達歯車２４と負荷時タップ切換器外部の動力装置（図示しない）からの動力を前記入力軸１３に伝える歯車機構１８により構成されている。
【０００４】
前記切換開閉器４ｂとタップ選択器５を電気的に接続するための前記接触装置６ｂと接触子８の配置構成を、図６の遮断部１ｂの構造を示した図７および図８で説明する。図７の（ａ）は図６の遮断部１ｂの平面図、（ｂ）は（ａ）で示したＸ−Ｘ線断面図、（ｃ）は（ｂ）で示したＹ−Ｙ線断面図、（ｄ）は（ｂ）で示したＡ矢視図である。また図８の（ｂ）は図６の遮断部１ｂの他の構造の正面図、（ａ）は（ｂ）で示したＸ−Ｘ線断面図、（ｃ）は（ｂ）で示したＹ−Ｙ線断面図、（ｄ）は（ｂ）で示したＡ矢視図である。図７および図８に示すように接触装置６ｂと接触子８の配置構成は負荷時タップ切換器の遮断部１ｂの構造により異なった配置になっており、図７に示す従来機器の構成では、絶縁軸２２と接続する軸５０の回転により可動接点５２が動作し、回転方向に順に前記可動接点５２と固定接点５１が接触あるいは乖離する構造で、前記接触装置６ｂと接触子８の配置構成は各相ごとに円周を３等分した位置に配置されている。また前記接触装置６ｂは前記接触子８と接続するための接触子５４と、この接触子５４の接触圧力を得るために前記固定接点５１と接触子５４を貫通したピン（図示しない）にバネ５５が取り付けられている。
図８に示す従来機器の他の構成では、可動接点５２を動作させる構造の違いから、前記接触装置６ｂと接触子８の配置構成は各相ごとに左右に対抗する配置になっている。前記接触装置６ｂの構成は図７と同等である。
【０００５】
【発明が解決しようとする課題】
近年、切換開閉器の遮断部に真空バルブを採用した負荷時タップ切換器が製品化されている。この負荷時タップ切換器は電流遮断を真空バルブによって行うため油が汚損されないメリットがあり、この切換開閉器および遮断部を駆動する蓄勢装置も点検および交換のために切換開閉器室内から取り外し可能な構造になっているので、従来の負荷時タップ切換器の切換開閉器および蓄勢機構を前記の真空バルブを採用した切換開閉器および蓄勢機構に交換すれば油の汚損が無く保守が省力化できる効果がある。しかしながら従来の切換開閉器では、各機種ごとにタップ選択器との電気的に接続するための接触装置と接触子の配置構成が異なり、さらに切換開閉器および蓄勢機構の高さ寸法（図６におけるＬ２）も各機種ごと異なっていた。また蓄勢機構へ動力を伝える伝達装置の入力軸と駆動軸との軸間寸法（図６におけるＬ１）も異なっていた。このため従来の負荷時タップ切換器の切換開閉器に変わって真空バルブを使用した切換開閉器に交換する場合は、各機種ごとの構造に合わせた真空バルブを使用した切換開閉器が必要になり、切換開閉器の機種が増えるため、部品の多様化に伴い製作コストが増加していた。上記の課題から、従来の負荷時タップ切換器の切換開閉器と真空バルブを採用した負荷時タップ切換器の切換開閉器とでは構造的に互換性がなかった。
【０００６】
そこで本発明は、従来の負荷時タップ切換器の切換開閉器と互換性を有するための機能を備えた、真空バルブを採用した負荷時タップ切換器の切換開閉器を提供することを目的とする。
【０００７】
【課題を解決するための手段】
前記課題を解決するために、本発明では次のような手段により負荷時タップ切換器の切換開閉器を構成する。請求項１に対応する発明は、変圧器負荷電流を遮断しタップ切換を行う切換開閉器の遮断部に真空バルブを使用した負荷時タップ切換器において、負荷時タップ切換器のタップ選択器と切換開閉器を電気的に接続するため、積み重ねた複数の絶縁板とその絶縁板に取り付けた複数の端子より構成し、前記絶縁板に前記タップ選択器と切換開閉器それぞれの接続位置に合わせた接続端子を設けたアダプターを使用した事により接触装置と接触子の接続位置を変更可能にし、また前記絶縁板の重なり合う寸法を変更することにより蓄勢機構と切換開閉器の高さ寸法を調整可能とするものである。
【０００８】
請求項２に対応する発明は、変圧器負荷電流を遮断しタップ切換を行う切換開閉器の遮断部に真空バルブを使用した負荷時タップ切換器において、遮断部を駆動する蓄勢機構へ動力を伝達する伝達装置の入力軸位置を調整するために、前記伝達装置の入力軸と駆動軸にクランクレバーを取付け、このクランクレバーをねじ穴を備えたレバーとねじ状の棒により連結した構造とする事により、前記伝達装置の入力軸と駆動軸の軸間寸法を調整可能にしたものである。
【０００９】
請求項３に対応する発明は、請求項１に対応するアダプターにおいて、切換開閉器の遮断部の接触装置の配置に合わせた切換開閉器用接続端子を取り付けた絶縁板と、タップ選択器の接触子の配置に合わせたタップ選択器用接続端子を取り付けた絶縁板を積み重ねて構成し、前記切換開閉器用接続端子とタップ選択器用接続端子を取り付けた絶縁板の中心部分に穴を設け、この穴に切換開閉器用接続端子とタップ選択器用接続端子を各相ごと接続する導体を通したことより、各導体の各端子近傍での接触を防ぎ各導体間の絶縁を確保するものである。
【００１０】
請求項４に対応する発明は、請求項１に対応するアダプターにおいて、切換開閉器の遮断部の接触装置の配置に合わせた切換開閉器用接続端子を取り付けた絶縁板と、タップ選択器の接触子の配置に合わせたタップ選択器用接続端子を取り付けた絶縁板を積み重ねて構成し、前記タップ選択器用接続端子を取り付ける絶縁板に溝を設け、この溝の位置にタップ選択器用接続端子をタップ選択器の接触子の配置に合わせて取り付けることにより、従来の負荷時タップ切換器のタップ選択器における各機種ごとに異なる前記タップ選択器の接触子の配置およびこの接触子における同一機種ごとの寸法誤差に対応する調整を可能にするものである。
【００１１】
【発明の実施の形態】
本発明の実施の形態例を図を用いて説明する。
図１は本発明の切換開閉器の実施の形態例を示し、図２および図３はタップ選択器と切換開閉器の電気的接続構造おける接続位置変更を行うためのアダプター実施例の詳細構成を示す。図２および図３の（ａ）は正面図、（ｂ）から（ｅ）は（ａ）で示した各断面指示線に沿う矢視図である。図４は図２および図３のアダプターを構成する絶縁板の構造例である。図５は遮断部を駆動する蓄勢機構へ動力を伝達する伝達装置の入力軸位置を調整構造の詳細を示す。尚、図１において、図６と同じ符号を付したものは、従来技術と同一もしくは相当であることを示し、説明は省略する。
【００１２】
図１に示すように本実施の形態例では、真空バルブを使用した遮断部１ａと限流抵抗部３から成る切換開閉器４ａを従来の負荷時タップ切換器のタップ選択器５と電気的に接続するために、前記遮断部１ａの接触装置６ａの配置と、タップ選択器５に接続された接触子８の配置に合わせた切換開閉器用接続端子１１と接触装置９を有したアダプター７を用いて切換開閉器４ａをタップ選択器５と電気的に接続する。
【００１３】
前記アダプター７の構成は図２および図３に示すように、前記遮断部１ａの接触装置６ａの配置に合わせた位置に切換開閉器用接続端子１１を取り付けた絶縁板３１と、タップ選択器５に接続された接触子８の配置に合わせた位置にタップ選択器用接続端子３４を取り付けた絶縁板３２とを積み重ねて支柱３３で保持し、前記切換開閉器用接続端子１１とタップ選択器用接続端子３４を電気的接続が必要な各相の端子ごとに絶縁された導体３５により接続し、タップ選択器用接続端子３４の先端に接触装置９を設ける。
【００１４】
前記切換開閉器用接続端子１１とタップ選択器用接続端子３４を接続する導体３５は、前記切換開閉器用接続端子１１とタップ選択器用接続端子３４を取り付けた絶縁板３１と３２の中心部分に穴を設け、この穴に前記導体導体３５を通して前記切換開閉器用接続端子１１とタップ選択器用接続端子３４を接続することにより、各導体の前記切換開閉器用接続端子１１とタップ選択器用接続端子３４の近傍での接触を防ぎ各導体間の絶縁を確保するものである。
【００１５】
従来の負荷時タップ切換器のタップ選択器５に接続された接触子８の配置が図８に示すような各相ごとに左右に対抗する配置で前記導体３５が交差し、各相ごとのタップ選択器用接続端子３４と導体３５の絶縁寸法が不足する場合は、図３に示すように前記絶縁板３２を各相ごと設けてタップ選択器用接続端子３４を取り付けて前記絶縁板３１に取り付けた切換開閉器用接続端子１１と前記導体３５で接続することにより各相間に必要な絶縁を確保する。
【００１６】
前記絶縁板３２は、従来の各機種ごとに異なるタップ選択器５に接続された接触子８の配置に合わせた位置に、タップ選択器用接続端子３４を取り付けるため図４に示す溝３６を設けてあり、この溝３６の範囲内で前記タップ選択器用接続端子３４を接触子８の位置に合わせて絶縁板３２に取り付け可能になっている。
【００１７】
前記絶縁板３１と３２との間隔寸法を支柱３３の長さを変更して積み重ねることにより、従来の各機種ごとに異なっていた切換開閉器および蓄勢機構の高さ寸法をアダプター７で調整可能になっている。
【００１８】
また図５に示すように、前記遮断部１ａを駆動する蓄勢機構２と、この蓄勢機構２へ外部動力装置からの動力を伝達する伝達装置１２ａの入力軸１３と駆動軸１４にクランクレバー１５を取付け、このクランクレバー１５をねじ穴を備えたレバー１６とねじ状の棒１７により、入力軸１３と駆動軸１４の距離に応じて伸縮可能に連結した構造とする。
【００１９】
【発明の効果】
本発明によれば、従来のタップ選択器５と遮断部１ａに真空バルブを使用した切換開閉器４ａを電気的に接続するための接続位置の調整と、前記切換開閉器４ａおよび蓄勢機構の高さ寸法の調整がアダプター７で可能になり、また前記遮断部１ａを駆動する蓄勢機構２と、この蓄勢機構２へ外部動力装置からの動力を伝達する伝達装置１２ａの入力軸１３と駆動軸１４の軸間寸法を調整する事により、従来の負荷時タップ切換器への使用が可能になる。
【図面の簡単な説明】
【図１】本発明の実施の形態例を示す負荷時タップ切換器の構造図。
【図２】本発明の実施の形態例におけるアダプターの構成図で（ａ）は正面図、（ｂ）と（ｃ）は（ａ）で示した各断面指示線に沿う矢視図である。
【図３】本発明の実施の形態例における他のアダプターの構成図で（ａ）は正面図、（ｂ）は（ａ）で示した各断面指示線に沿う矢視図である。
【図４】本発明の実施の形態例におけるアダプターを構成する絶縁板の構造図。
【図５】本発明の実施の形態例における伝達装置の軸間寸法調整機能の構造図で、（ａ）は平面図、（ｂ）は正面図である。
【図６】従来の負荷時タップ切換器の構造図で、（ａ）は平面図、（ｂ）は正面図である。
【図７】従来の負荷時タップ切換器における切換開閉器の遮断部構造図および切換開閉器とタップ選択器の電気的接続位置の第１の配置図で、（ａ）は平面図、（ｂ）は（ａ）で示したＸ−Ｘ線断面図、（ｃ）は（ｂ）で示したＹ−Ｙ線断面図、（ｄ）は（ｂ）で示したＡ矢視図である。
【図８】従来の負荷時タップ切換器における切換開閉器の遮断部構造図および切換開閉器とタップ選択器の電気的接続位置の第２の配置図で、（ｂ）は正面図、（ａ）は（ｂ）で示したＸ−Ｘ線断面図、（ｃ）は（ｂ）で示したＹ−Ｙ線断面図、（ｄ）は（ｂ）で示したＡ矢視図である。
【符号の説明】
１ａ遮断部
２蓄勢装置
５タップ選択器
６ａ接触装置
７アダプター
１３入力軸
１４駆動軸
１５クランクレバー
１６レバー
３１，３２絶縁板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load tap changer.
[0002]
[Prior art]
The configuration of the prior art on-load tap changer will be described using an example of an oil-filled transformer shown in FIGS. The on-load tap changer is a device that can switch taps during operation of the transformer. In FIG. 6, a tap selector 5 that selects an arbitrary transformer tap according to the load of the transformer, and an optional transformer. When switching to a tap and a transformer tap adjacent to the tap, the interrupting portion 1b for cutting off the transformer load current and the circulating current between the taps when the tap is switched (the state where the adjacent taps are selected) The switching switch 4b having the current limiting resistance unit 3 to be suppressed and the accumulator mechanism 2 for driving the blocking unit 1b, and the power is transmitted to the accumulator mechanism 2 and the tap selector 5 through the insulating shafts 21 and 22. The transmission device 12b is installed in the transformer tank 23.
[0003]
Since the switching switch 4b pollutes the insulating oil, which is an insulating medium, due to the carbon generated when the transformer load current is interrupted when the tap is switched, the insulating oil, which is an insulating medium around the switching switch 4b and the energy storage mechanism 2, is used. Is isolated from the insulating oil in the tap selector 5 and the transformer tank 23, a switching switch chamber 10 is provided, and the switching switch 4b, the energy storage mechanism 2, and the transmission device 12b are provided in the switching switch chamber 10. Is housed.
The switching switch 4b and the tap selector 5 are electrically connected by the contact device 6b of the blocking portion 1b and the contact 8 connected to the tap selector 5, and the switching switch 4b, the energy storage mechanism 2, and the transmission device. A part of 12b has a structure that can be removed from the switching switch room 10 for inspection and replacement.
The transmission device 12b for transmitting power to the energy storage mechanism 2 receives power from a power gear (not shown) outside the transmission gear 24 attached to the input shaft 13 and the drive shaft 14 and the on-load tap changer. 13 is constituted by a gear mechanism 18 for transmitting to the motor 13.
[0004]
The arrangement of the contact device 6b and the contact 8 for electrically connecting the switching switch 4b and the tap selector 5 will be described with reference to FIGS. 7 and 8 showing the structure of the blocking portion 1b of FIG. . 7A is a plan view of the blocking portion 1b of FIG. 6, FIG. 7B is a sectional view taken along line XX shown in FIG. 7A, and FIG. 7C is a sectional view taken along line YY shown in FIG. (D) is an A arrow view shown in (b). 8B is a front view of another structure of the blocking portion 1b of FIG. 6, FIG. 8A is a cross-sectional view taken along the line XX shown in FIG. 8B, and FIG. 8C is a Y view shown in FIG. -Y sectional drawing, (d) is A arrow view shown by (b). 7 and 8, the arrangement of the contact device 6b and the contact 8 is different depending on the structure of the blocking portion 1b of the on-load tap changer. In the configuration of the conventional device shown in FIG. The movable contact 52 is operated by the rotation of the shaft 50 connected to the insulating shaft 22, and the movable contact 52 and the fixed contact 51 are sequentially contacted or separated from each other in the rotation direction. The arrangement of the contact device 6b and the contact 8 is as follows. It arrange | positions in the position which divided the circumference into 3 equally for every phase. The contact device 6b has a contact 54 for connecting to the contact 8 and a spring 55 on a pin (not shown) penetrating the fixed contact 51 and the contact 54 in order to obtain a contact pressure of the contact 54. Is attached.
In another configuration of the conventional device shown in FIG. 8, the arrangement of the contact device 6b and the contact 8 is opposed to the left and right for each phase because of the difference in the structure for operating the movable contact 52. The configuration of the contact device 6b is the same as that shown in FIG.
[0005]
[Problems to be solved by the invention]
In recent years, on-load tap changers that employ a vacuum valve in the breaker of the changeover switch have been commercialized. This load tap switch has the merit that oil is not polluted because the current is cut off by a vacuum valve, and the switch accumulator and the accumulator that drives the breaker can also be removed from the switch box for inspection and replacement. Therefore, if the conventional switching switch and accumulating mechanism of the on-load tap changer are replaced with the switching switch and accumulating mechanism using the vacuum valve, there is no oil contamination and maintenance is saved. There is an effect that can be made. However, in the conventional switching switch, the arrangement of the contact device and the contact for electrical connection with the tap selector is different for each model, and the height dimensions of the switching switch and the energy storage mechanism (FIG. 6). L2) was different for each model. Further, the inter-axis dimension (L1 in FIG. 6) between the input shaft and the drive shaft of the transmission device for transmitting power to the energy storage mechanism was also different. For this reason, when switching to a switching switch that uses a vacuum valve instead of a conventional switching switch for a load tap, a switching switch that uses a vacuum valve that matches the structure of each model is required. As the number of switching switches increases, production costs increase with the diversification of parts. Due to the above-described problems, there is no structural compatibility between the switching switch of the conventional on-load tap changer and the switching switch of the on-load tap changer employing a vacuum valve.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a switching switch for an on-load tap changer employing a vacuum valve, which has a function for compatibility with a switching switch of a conventional on-load tap changer. .
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention constitutes a switching switch of the on-load tap changer by the following means. The invention corresponding to claim 1 is an on-load tap changer that uses a vacuum valve as a cut-off portion of a switching switch that cuts off the transformer load current and performs tap switching. In order to electrically connect the switch, it is composed of a plurality of stacked insulating plates and a plurality of terminals attached to the insulating plates, and the insulating plate is connected to the connection positions of the tap selector and the switching switch. By using an adapter with a terminal, the connection position between the contact device and the contact can be changed, and the height of the energy storage mechanism and the switching switch can be adjusted by changing the overlapping dimensions of the insulating plates. To do.
[0008]
The invention corresponding to claim 2 is an on-load tap changer that uses a vacuum valve as a cut-off portion of a switching switch that cuts off the transformer load current and performs tap switching, and supplies power to the energy storage mechanism that drives the cut-off portion. In order to adjust the input shaft position of the transmission device for transmission, a crank lever is attached to the input shaft and the drive shaft of the transmission device, and this crank lever is connected to a lever having a screw hole by a screw-like rod. Thus, the dimension between the input shaft and the drive shaft of the transmission device can be adjusted.
[0009]
According to a third aspect of the present invention, there is provided an adapter corresponding to the first aspect, wherein an insulating plate provided with a connection terminal for a switching switch in accordance with the arrangement of the contact device of the switching portion of the switching switch, and a contact of the tap selector The insulating plate with the tap selector connection terminal is stacked to match the layout of the switch, and a hole is provided in the center of the insulating plate with the switching switch connection terminal and the tap selector connection terminal. By passing the conductors connecting the switch connection terminals and the tap selector connection terminals for each phase, contact between the conductors in the vicinity of the terminals is prevented and insulation between the conductors is ensured.
[0010]
According to a fourth aspect of the present invention, there is provided an adapter corresponding to the first aspect, wherein an insulating plate is provided with a switching switch connection terminal adapted to the arrangement of the contact device of the switching switch breaker, and a tap selector contact. Insulating plates with tap selector connection terminals that match the layout of the taps are stacked to form a groove in the insulating plate to which the tap selector connection terminals are attached, and the tap selector connection terminals are located at the positions of the grooves. By installing according to the arrangement of the contact, the tap selector contact arrangement that differs for each model in the tap selector of the conventional load tap changer and the dimensional error for each same model of this contact The corresponding adjustment is possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a switching switch according to the present invention, and FIGS. 2 and 3 show the detailed configuration of an adapter embodiment for changing the connection position in the electrical connection structure of a tap selector and a switching switch. Show. 2A and 2A are front views, and FIGS. 2B to 3E are arrow views along the cross-section instruction lines shown in FIG. FIG. 4 is a structural example of an insulating plate constituting the adapter of FIGS. FIG. 5 shows the details of the structure for adjusting the input shaft position of the transmission device that transmits power to the energy storage mechanism that drives the blocking portion. In FIG. 1, the same reference numerals as those in FIG. 6 denote the same or corresponding parts as those in the prior art, and description thereof will be omitted.
[0012]
As shown in FIG. 1, in this embodiment, a switching switch 4a composed of a shut-off unit 1a using a vacuum valve and a current limiting resistor unit 3 is electrically connected to a tap selector 5 of a conventional on-load tap changer. In order to connect, an adapter 7 having a switching switch connection terminal 11 and a contact device 9 that matches the arrangement of the contact device 6a of the blocking unit 1a and the contact 8 connected to the tap selector 5 is used. Thus, the switch 4a is electrically connected to the tap selector 5.
[0013]
As shown in FIGS. 2 and 3, the adapter 7 includes an insulating plate 31 having a switching switch connection terminal 11 attached at a position corresponding to the arrangement of the contact device 6 a of the blocking portion 1 a, and a tap selector 5. An insulating plate 32 having a tap selector connection terminal 34 attached thereto is stacked at a position corresponding to the arrangement of the connected contacts 8 and held by a support 33, and the switching switch connection terminal 11 and the tap selector connection terminal 34 are connected to each other. Each phase terminal requiring electrical connection is connected by an insulated conductor 35, and a contact device 9 is provided at the tip of the tap selector connection terminal 34.
[0014]
The conductor 35 that connects the switching switch connection terminal 11 and the tap selector connection terminal 34 is provided with a hole in the central portion of the insulating plates 31 and 32 to which the switching switch connection terminal 11 and the tap selector connection terminal 34 are attached. By connecting the switching switch connection terminal 11 and the tap selector connection terminal 34 through the conductor conductor 35 to the hole, each conductor near the switching switch connection terminal 11 and the tap selector connection terminal 34 is connected. This prevents contact and ensures insulation between the conductors.
[0015]
The arrangement of the contacts 8 connected to the tap selector 5 of the conventional on-load tap changer is such that the conductors 35 cross each other in such a manner as to oppose left and right for each phase as shown in FIG. In the case where the insulation dimension between the selector connection terminal 34 and the conductor 35 is insufficient, as shown in FIG. 3, the insulation plate 32 is provided for each phase, the tap selector connection terminal 34 is attached, and the switch is attached to the insulation plate 31. Necessary insulation is ensured between the phases by connecting the switch connection terminal 11 with the conductor 35.
[0016]
The insulating plate 32 is provided with a groove 36 shown in FIG. 4 for attaching a tap selector connection terminal 34 at a position corresponding to the arrangement of the contact 8 connected to the tap selector 5 different for each conventional model. The tap selector connection terminal 34 can be attached to the insulating plate 32 in accordance with the position of the contact 8 within the range of the groove 36.
[0017]
The distance between the insulating plates 31 and 32 can be adjusted by changing the length of the support 33, and the height of the switching switch and the energy storage mechanism, which is different for each model, can be adjusted with the adapter 7. It has become.
[0018]
Further, as shown in FIG. 5, the accumulator mechanism 2 that drives the blocking portion 1a, and the input lever 13 and the drive shaft 14 of the transmission device 12a that transmits the power from the external power unit to the accumulator mechanism 2 are crank levers. The crank lever 15 is connected by a lever 16 having a screw hole and a threaded rod 17 so that the crank lever 15 can be expanded and contracted according to the distance between the input shaft 13 and the drive shaft 14.
[0019]
【The invention's effect】
According to the present invention, the adjustment of the connection position for electrically connecting the conventional tap selector 5 and the switching switch 4a using a vacuum valve to the shut-off portion 1a, and the switching switch 4a and the energy storage mechanism are adjusted. The height can be adjusted by the adapter 7, and the energy storage mechanism 2 that drives the blocking portion 1 a, and the input shaft 13 of the transmission device 12 a that transmits power from the external power device to the energy storage mechanism 2, By adjusting the inter-axis dimension of the drive shaft 14, it can be used for a conventional on-load tap changer.
[Brief description of the drawings]
FIG. 1 is a structural diagram of a load tap changer according to an embodiment of the present invention.
2A is a front view of an adapter according to an embodiment of the present invention, and FIG. 2B is a front view thereof, and FIGS. 2B and 2C are arrow views along respective cross-sectional instruction lines shown in FIG.
3A is a front view of another adapter in the embodiment of the present invention, and FIG. 3B is an arrow view along each cross-section indicating line shown in FIG.
FIG. 4 is a structural diagram of an insulating plate constituting an adapter according to an embodiment of the present invention.
FIGS. 5A and 5B are structural views of an inter-axis dimension adjusting function of a transmission device according to an embodiment of the present invention, where FIG. 5A is a plan view and FIG.
FIG. 6 is a structural diagram of a conventional on-load tap changer, in which (a) is a plan view and (b) is a front view.
FIG. 7 is a block diagram of a switching switch breaker in a conventional load tap changer and a first layout of electrical connection positions of the switch and the tap selector, where (a) is a plan view and (b) ) Is a cross-sectional view taken along line XX shown in (a), (c) is a cross-sectional view taken along line YY shown in (b), and (d) is a view taken in the direction of arrow A shown in (b).
FIG. 8 is a block diagram of a switching part of a switching switch and a second layout of electrical connection positions of the switching switch and the tap selector in a conventional load tap changer, in which (b) is a front view, (a) ) Is a cross-sectional view taken along line XX shown in (b), (c) is a cross-sectional view taken along line YY shown in (b), and (d) is a view taken in the direction of arrow A shown in (b).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a Blocking part 2 Energy storage device 5 Tap selector 6a Contact device 7 Adapter 13 Input shaft 14 Drive shaft 15 Crank lever 16 Lever 31, 32 Insulating plate

Claims

In a load tap changer that uses a vacuum valve as a cut-off part of a switching switch that cuts off the transformer load current and performs tap switching, a connection terminal for the switching switch for deriving electricity from the switching switch, and a tap selector A contact device for connecting the switch to the adapter, the adapter capable of changing the height dimension of the energy storage mechanism and the switching switch, and in the adapter, an insulating plate through which the switching switch connection terminal passes and the connection for the switching switch A conductor connected to the terminal; another insulating plate having a hole through which the conductor passes; and a connection terminal for a tap selector connected to the other insulating plate to which the conductor passing through the hole is connected. An on-load tap changer, characterized in that the contact device attached to the connection terminal for the tap selector is in contact with the contact of the tap selector.

In the on-load tap changer that uses a vacuum valve for the breaker of the switching switch that cuts off the transformer load current and performs tap switching, the input shaft position of the transmission device that transmits power to the energy storage mechanism that drives the breaker 2. A tap under load according to claim 1 , wherein a crank lever is attached to an input shaft and a drive shaft of the transmission device for adjustment, and the crank lever is connected to a lever provided with a screw hole by a screw-like rod. Switcher.

In order to electrically connect the tap selector of the load tap changer and the switching switch, the connection terminal of the switching switch according to the arrangement of the contact device of the cutoff part of the switching switch , and the contact of the contact of the tap selector In an adapter with a tap selector connection terminal that matches the arrangement, the tap selector connection terminal of one of the three phases of the insulating plate with the switching switch connection terminal and the tap selector contact. The other insulating plate that penetrates only the center and has a hole in the center, the connection terminal for the switching switch of one phase, and the conductor that connects the corresponding connection terminal for the tap selector through the central hole, Of the three phases of the contact of the tap selector, another second insulating plate that penetrates only the tap selector connection terminal of the first and second phases and has a hole in the center; Second phase switching switch The first, second, and third phases among the three phases of the connection terminal, the conductor for connecting the tap selector of the corresponding phase through the center hole, and the contact of the tap selector. A third insulating plate having a hole in the center and penetrating through the connection terminal for the tap selector, and the connection terminal for the switching switch of the third phase and the connection terminal for the tap selector of the corresponding phase. has a conductor connecting through said central hole, claim 1, characterized in that it has an adapter that ensures an insulation distance of the conductor between the phases, claim 2, load tap changer according to claim 3.

In order to electrically connect the tap selector of the load tap changer and the changeover switch, an insulating plate having a connection terminal for the changeover switch adapted to the arrangement of the contact device of the breaking part of the changeover switch, and the tap selector In an adapter configured by stacking insulating plates with tap selector connection terminals that match the arrangement of the contacts, a groove is provided in the insulating plate to which the tap selector connection terminal is attached, and the tap selector connection is located at the position of this groove claim 1, wherein the attaching together terminals to the arrangement of the contacts of the tap selector, claim 2, load tap changer according to claim 3.