【０００１】
【発明の属する技術分野】
本発明は、ガス絶縁開閉装置の高圧回路に対し、接続、切離しが容易なガス絶縁計器用変圧器の改良に関する。
【０００２】
【従来の技術】
従来、ガス絶縁計器用変圧器は、ガス絶縁開閉装置（ＧＩＳ）に設けられ、高電圧回路の電圧変成を行うものであるが、ガス絶縁開閉装置に直流または交流を通電させる課電試験を行う場合、ガス絶縁開閉装置の高電圧回路から切り離すか、あるいは独立の断路装置を設けて切離しを行っていた。
【０００３】
また、最近のガス絶縁計器用変圧器では、ガス絶縁開閉装置の高電圧回路との接続、切離し機構の開発が進歩し、ガス絶縁開閉装置に取り付けたままの状態であっても、ガス絶縁開閉装置の交流耐電圧試験やケーブルの直流耐電圧試験等を行うことができるようになっており、その構成として図８に示すものがある。なお、図８は、三相形ガス絶縁計器用変圧器を一例として示している。
【０００４】
三相形ガス絶縁計器用変圧器は、絶縁ガスａを充填し、三相分の電圧変成部２を収容する筒状の容器１と、この筒状の容器１の頂部開口部側に設けた三相用の絶縁スペーサ３とを備えている。
【０００５】
また、三相形ガス絶縁計器用変圧器は、筒状の容器１に設けた三相用の絶縁スペーサ３の気密性を維持させつつ貫通する高圧導体４を設けるとともに、高圧導体４の一端部に接続導体７を備えている。なお、高圧導体４の他端部は、ガス絶縁開閉装置の高圧線路（図示せず）に接続している。
【０００６】
一方、電圧変成部２は、高圧導体４の接続導体７と接続、切離しが容易な高圧側着脱接触可動部１０を備えている。
【０００７】
この高圧側着脱接触可動部１０は、電圧変成部２から絶縁スペーサ３側に向って延びる高電圧側端部５と、この高電圧側端部５の先端に設けられ、進退自在に摺動する高圧端子６とを備え、高圧端子６を高圧導体４の接続導体７に対し、接続、切離しを容易にしている。
【０００８】
また、三相形ガス絶縁計器用変圧器は、筒状の容器１の頂部側に設けた絶縁スペーサ３と反対側の位置に操作装置８を備えている。
【０００９】
この操作装置８は、Ｔ字状に形成する絶縁棒９と、Ｔ字状の両先端部に設けた高圧端子６とを備えて構成されている。
【００１０】
このような構成を備えた三相形ガス絶縁計器用変圧器は、特開２００２−８４６１０号公報（例えば、特許文献１参照）に見られるように、操作装置８の駆動力で絶縁棒９を進退させ、この進退力に伴って高圧端子６が追従するから、高圧端子６と高圧導体４の接続導体７との間で接続、切離しを自在に行うことができる。
【００１１】
したがって、従来の三相形ガス絶縁計器用変圧器では、課電試験時、高圧端子６が高圧導体４の接続導体７から確実に切り離されているので、電圧変成部２に電流が通電されることもなく、充分に安全なテストを行うことができる。
【００１２】
【特許文献１】
特開２００２−８４６１０号公報
【００１３】
【発明が解決しようとする課題】
ところで、従来の三相形ガス絶縁計器用変圧器は、課電試験時、電圧変成部２に電流が通電されていないので、充分に安全なテストを行うことができるものの、それでも幾つかの問題点があり、その一つに絶縁耐力不足がある。
【００１４】
従来、３相形ガス絶縁計器用変圧器は、高圧側着脱接触可動部１０が無電状態での切離しが行われることを想定し設計しているため、通電状態から急に電圧変成部２の切離しを行うと、電圧変成部２等に絶縁耐力不足が生じ、絶縁破壊を起こすことがあった。
【００１５】
このため、三相形ガス絶縁計器用変圧器は、操作装置８を駆動する場合、高圧側着脱接触可動部１０やガス絶縁開閉装置の主回路等が無電状態であったかの有無を確認する一方、高圧側着脱接触可動部１０を接続、切離しを行う場合、ガス絶縁開閉装置への通電の有無を確認しなければならず、操作員により多くの労力と通電に伴う危険性とを強いていた。
【００１６】
このような事情から、三相形ガス絶縁計器用変圧器には、例えばガス絶縁開閉装置の主回路等が通電状態の場合、高圧側着脱接触可動部１０の開閉ができない機構を持った保護安全装置の設置が望まれていた。
【００１７】
本発明は、このような事情に基づいてなされたもので、高圧側着脱接触可動部の接続、切離しを行う際、高圧側着脱接触可動部等の絶縁破壊を防止させるとともに、操作員の労力軽減と相俟って危険性を防止するガス絶縁計器用変圧器を提供することを目的とする。
【００１８】
【課題を解決するための手段】
本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項１に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置に接続する折畳み式ハンドル軸部と、この折畳み式ハンドル軸部に設けられたロック機構に前記高圧端子が通電中、ロック指令を出して前記折畳み式ハンドル軸部をロックさせ、前記高圧端子が無電状態のとき、前記ロック機構にロック解除指令を出して前記折畳み式ハンドル軸部を作動せしめる制御指令部を備えたものである。
【００１９】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項２に記載したように、折畳み式ハンドル軸部は、複数のハンドル軸部で構成し、そのうちの一つにハンドル把持部を回転自在に支持する支持ピンを備えたものである。
【００２０】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項３に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置の絶縁軸に差し込む差込み式ハンドル装置と、前記絶縁軸の差込み穴に設けたシャッタと、高圧端子が通電中、前記シャッタに前記差込み穴を塞ぐ指令を出して前記差込み式ハンドル装置をロックさせ、前記高圧端子が無電状態のとき、前記シャッタに前記差込み穴を開放する指令を出して前記差込み式ハンドル装置を作動せしめる制御指令部とを備えたものである。
【００２１】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項４に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置の絶縁軸に設けられ、ガイドを備えたハンドル装置と、前記ガイドの作動を拘束、無拘束自在させるストッパと、前記高圧端子が通電中、前記ストッパに突出し指令を出して前記ガイドを拘束して前記ハンドル装置をロックさせ、前記高圧端子が無電状態のとき、前記ストッパに沈み込み指令を出して前記ガイドをロック解除させ、前記ハンドル装置を作動せしめる制御指令部とを備えたものである。
【００２２】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項５に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置の絶縁軸に設けられ、クランプに囲われた昇降板と、前記絶縁軸に設けたハンドル装置と、前記高圧端子が通電中、前記クランプに押圧力を与えて前記昇降板を拘束して前記ハンドル装置をロックさせ、前記高圧端子が無電状態のとき、前記クランプから前記昇降板に与える押圧力を解除して前記ハンドル装置を作動せしめる制御指令部とを備えたものである。
【００２３】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項６に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置の絶縁軸に設けたクラッチ板と、前記絶縁軸に設けたハンドル装置と、前記高圧端子が通電中、前記クラッチ板に軸結合指令を解除して前記ハンドル装置をロックさせ、前記高圧端子が無電状態のとき、前記クラッチ板に軸結合指令を出して前記ハンドル装置を作動せしめる制御指令部とを備えたものである。
【００２４】
また、本発明に係るガス絶縁計器用変圧器は、上述の目的を達成するために、請求項７に記載したように、容器内に収容する電圧変成部の高圧端子に、前記容器の外部より気密に介挿された接続導体との接離を行わせる高圧側着脱接触可動部を備えるとともに、この高圧側着脱接触可動部の駆動を操作する操作装置を備えたガス絶縁計器用変圧器において、前記操作装置の絶縁軸に設けた電気粘性流体クラッチと、前記絶縁軸に設けたハンドル装置と、前記高圧端子が通電中、前記電気粘性流体クラッチに軸結合指令を解除して前記ハンドル装置をロックさせ、前記高圧端子が無電状態のとき、前記電気粘性流体クラッチに軸結合指令を出して前記ハンドル装置を作動せしめる制御指令部とを備えたものである。
【００２５】
【発明の実施の形態】
以下、本発明に係るガス絶縁計器用変圧器の実施形態を図面および図面に付した符号を引用して説明する。
【００２６】
図１および図２は、本発明に係るガス絶縁計器用変圧器の第１実施形態を示す概念図である。なお、図１は、本発明に係るガス絶縁計器用変圧器の縦断面図であり、図２は図１のＡ−Ａ矢視方向切断断面図である。また、本実施形態に係るガス絶縁計器用変圧器は、例示として三相形を適用対象としているが、これに限らず、単相または二相形でも適用される。
【００２７】
図１および図２には、本実施形態に係る三相形ガス絶縁計器用変圧器において、絶縁ガスを充填し、三相分の電圧変成部１２と高圧側着脱接触可動部１３とを収容する筒状の容器１１が示されている。
【００２８】
この筒状の容器１１は、頂部開口部側の高圧側着脱接触可動部１３に接続する絶縁スペーサ１４を備えるとともに、その反対側の底部側に電圧変成部１２に接続する操作装置１９を備えている。
【００２９】
高圧側着脱接触可動部１３は、電圧変成部１２から絶縁スペーサ１４側に向って延びる高電圧側端子１５と、この高電圧側端子１５の先端に設けられ、進退自在に摺動する高圧端子１６とを備えるとともに、高圧端子１６に対向配置する高圧導体１７の接続導体１８とを備え、接続導体１８に対し、接続、切離しの操作を容易に行える構成になっている。
【００３０】
また、絶縁スペーサ１４は、気密性を維持しつつ、貫通する高圧導体１７を備えるとともに、高圧導体１７の一端部に接続導体１８を備えている。
【００３１】
また、操作装置１９は、枝状のアーム軸２０ｂ，２０ｃと幹部としての駆動軸２０ａとでＴ字状に形成した絶縁軸２０を備え、アーム軸２０ｂ，２０ｃに接続する高圧端子１６，１６を高圧側導体接触可動部１３の接続導体１８に対し、接続（接触）、切離しを行っている。
【００３２】
このような構成を備えるガス絶縁計器用変圧器のうち、操作装置１９の構成を今少し詳しく説明する。
【００３３】
操作装置１９は、ボックス状のケース２１内に収容され、容器１１内から延びる絶縁軸２０と、この絶縁軸２０に接続し、ケース２１の外側に設けられた折畳み式ハンドル軸部２２と、折畳み式ハンドル軸部２２に装着したハンドル把持部２３と、ガス絶縁開閉装置の主回路（図示せず）が通電しているとき、折畳み式ハンドル軸部２２にロック指令を与える制御指令部２４とで構成されている。
【００３４】
また、折畳み式ハンドル軸部２２は、図３（ｂ）〜（ｇ）に示すように、第１折畳み式ハンドル軸部２２ａと第２折畳み式ハンドル軸部２２ｂとに区分けして折畳みができるよう構成するとともに、第２折畳み式ハンドル軸部２２ｂを第１折畳み式ハンドル軸部２２ａに折り畳んだとき、第２折畳み式ハンドル軸部２２ｂをロックするロックピン２５とで構成されている。
【００３５】
このような構成を備えた折畳み式ハンドル軸部２２は、ガス絶縁開閉装置の課電試験開始のとき、ガス絶縁開閉装置の主回路に通電されていないことがわかると、図３（ｅ）に示すように、制御指令部２４から第２折畳み式ハンドル軸部２２ｂのロックピン２５にロック解除指令が与えられ、この指令に基づいて図３（ｄ）に示すように、第２折畳み式ハンドル軸部２２ｂを第１折畳み式ハンドル軸部２２ａから開き、さらに、図３（ｃ）に示すように、ハンドル把持部２３を回転自在に支持する支持ピン２６を介して起こす。
【００３６】
折畳み式ハンドル軸部２２の準備が終ると、操作装置１９は、図３（ｂ）に示すように、ハンドル把持部２３を矢印ＡＲの方向に回転させ、この回転駆動力を絶縁軸２０に伝えて高圧側着脱接触可動部の高圧端子を高圧導体の接続導体から切り離す。
【００３７】
他方、ガス絶縁開閉装置の主回路が通電中の場合、第２折畳み式ハンドル軸部２２ｂは、図３（ｆ）に示すように、制御指令部２４からのロック解除指令が出ないので、第１折畳み式ハンドル軸部２２ａに折り畳まれたままロックされる。
【００３８】
このように、本実施形態は、電圧変成部の高圧端子を駆動する操作装置１９の折畳み式ハンドル軸部２２にロック機構を設け、ガス絶縁開閉装置の主回路が通電中でないとき、制御指令部２４から折畳み式ハンドル軸部２２のロックピン２５にロック解除指令を出す構成にしたので、高圧側着脱接触可動部の切離しを行う場合、急な操作によって発生する衝撃力に基づく高圧側着脱接触可動部等の絶縁破壊を防止でき、操作員の操作に伴う危険性を防止することができる。
【００３９】
図４は、本発明に係るガス絶縁計器用変圧器の第２実施形態を示す概念図である。なお、図４中、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｌ）は操作装置の作動手順を示す図である。また、第１実施形態の構成要素と同一構成要素には同一符号を付す。
【００４０】
本実施形態に係る操作装置１９は、ボックス状のケース２１内に収容され、容器１１から延びる絶縁軸２０と、この絶縁軸２０に接続、切離し自在な差込み式ハンドル装置２７と、ガス絶縁開閉装置の主回路（図示せず）が通電しているとき、ケース２１に設けた差込み穴２８を塞ぎ、ガス絶縁開閉装置の主回路が無電状態のとき、ケース２１に設けた差込み穴２８を開放するシャッタ２９に開閉制御指令を与える制御指令部２４とで構成されている。
【００４１】
また、差込み式ハンドル装置２７は、図４（ｂ）に示すように、ハンドル軸部３０の一端に差込みピン３１を、他端にハンドル把持部２３とを備えている。
【００４２】
このような構成を備えた差込み式ハンドル装置２７は、ガス絶縁開閉装置の課電試験開始のとき、ガス絶縁開閉装置の主回路に通電されていないことがわかると、図４（ｃ）に示すように、制御指令部２４からシャッタ２９にロック解除指令が与えられ、シャッタ２９が図示の位置に移動する。
【００４３】
シャッタ２９が図示の位置に移動し、ケース２１に設けた差込み穴２８が開放されると、差込み式ハンドル装置２７は、ハンドル軸部３０の差込みピン３１を差込み穴２８に挿通させる。
【００４４】
差込み式ハンドル装置２７の準備が終ると、操作装置１９は、ハンドル把持部２３を矢印ＡＲの方向に回転させ、この回転駆動力を絶縁軸２９に伝えて高圧側着脱接触可動部の高圧端子を高圧導体の接続導体から切り離す。
【００４５】
他方、ガス絶縁開閉装置の主回路が通電中の場合、シャッタ２９は、図４（ｄ）に示すように、制御指令部２４からのロック解除指令が出ないので、閉じたままになる。このため、ケース２１に設けた差込み穴２８はシャッタ２９で閉じたままになるので、差込み式ハンドル装置２７の差込みが防止される。
【００４６】
このように、本実施形態は、電圧変成部の高圧端子を駆動する操作装置１９に差込み式ハンドル装置２７を設けるとともに、ケース２１に設けた差込み穴２８にシャッタ２９を設け、ガス絶縁開閉装置の主回路が通電中でないとき、制御指令部２４からシャッタ２９にロック解除指令を出し、差込み式ハンドル装置２７を差込み穴２８はに挿通させる構成にしたので、高圧側着脱接触可動部の切離しを行う場合、急な操作によって発生する衝撃力に基づく高圧側着脱接触可動部の絶縁破壊を防止でき、操作員の操作に伴う危険性を防止することができる。
【００４７】
図５は、本発明に係るガス絶縁計器用変圧器の第３実施形態を示す概念図である。なお、図５中、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｃ）は操作装置の作動手順を示す図である。また、第１実施形態の構成要素と同一構成要素には同一符号を付す。
【００４８】
本実施形態に係る操作装置１９は、ボックス状のケース２１内に収容され、容器１１から延びる絶縁軸２０と、この絶縁軸２０に設けた差込み式ハンドル装置２７と、ガス絶縁開閉装置の主回路（図示せず）が通電しているとき、ケース３２に設けたガイド３３をロックさせ、ガス絶縁開閉装置の主回路が無電状態のとき、ハンドル装置３２に設けたガイド３３を開放するストッパ３４と、このストッパ３４にガス絶縁開閉装置の主回路が通電しているとき、ストッパ３４に突出し指令を出し、位置“ａ”に移動させてガイド３３をロックさせ、ガス絶縁開閉装置の主回路が無電状態のとき、ストッパ３４に沈み込み指令を出し、位置“ｂ”に移動させてガイド３３を開放する制御指令部２４とで構成されている。
【００４９】
また、ハンドル装置３２は、ハンドル軸部３０の一端をガイド３３に接続し、他端にハンドル把持部２３を備えている。
【００５０】
このような構成を備えたハンドル装置３２は、ガス絶縁開閉装置の課電試験開始のとき、ガス絶縁開閉装置の主回路に通電されていないことがわかると、図５（ｂ）に示すように、制御指令部２４からストッパ３４に沈み込み指令が出され、ストッパ３４を位置“ｂ”に沈み込ませ、ガイド３３をハンドル軸部３０と同期させ、ハンドル把持部２３を矢印ＡＲの方向に回転させ、この回転駆動力を絶縁軸２０に伝えて高圧側着脱接触可動部の高圧端子を高圧導体の接続導体から切り離す。
【００５１】
他方、ガス絶縁開閉装置の主回路が通電中の場合、図５（ｃ）に示すように、制御指令部２４からストッパ３４にロック解除指令が出ないので、ストッパ３４を位置“ａ”に突出させ、ハンドル装置３２をロックさせる。
【００５２】
このように、本実施形態は、電圧変成部の高圧端子を駆動する操作装置１９にハンドル装置３２を設けるとともに、このハンドル装置３２にガイド３３とストッパ３４を備え、ガス絶縁開閉装置の主回路が通電中でないとき、制御指令部２４からストッパ３４に沈み込み指令を出し、ガイド３３に同期させてハンドル軸部３０を回転させる構成にしたので、高圧側着脱接触可動部の切離しを行う場合、急な操作によって発生する衝撃力に基づく高圧側着脱接触可動部等の絶縁破壊を防止でき、操作員の操作に伴う危険性を防止することができる。
【００５３】
図６は、本発明に係るガス絶縁計器用変圧器の第４実施形態を示す概念図である。なお、図６中、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｃ）は操作装置の作動手順を示す図である。また、第１実施形態の構成要素と同一構成要素には同一符号を付す。
【００５４】
本実施形態に係る操作装置１９は、ボックス状のケース２１内に収容され、容器１１から延びる絶縁軸２０と、この絶縁軸２０に設けた昇降板３５を囲うクランプ３６と、このクランプ３６を介して絶縁軸２０に接続するハンドル装置３２と、ガス絶縁開閉装置の主回路（図示せず）が通電しているとき、クランプ３６から昇降板３５をロックさせ、ガス絶縁開閉装置の主回路が無電状態のとき、クランプ３６から昇降板３５に与えていた押圧力を解除し、昇降板３５に開放指令を出す制御指令部２４とで構成されている。
【００５５】
また、ハンドル装置３２は、ハンドル軸部３０の一端を絶縁軸２０に接続し、他端にハンドル把持部２３を備えている。
【００５６】
このような構成を備えたハンドル装置３２は、ガス絶縁開閉装置の課電試験開始のとき、ガス絶縁開閉装置の主回路に通電されていないことがわかると、図６（ｂ）に示すように、制御指令部２４からクランプ３６に昇降板３５のや押圧力解除指令が出され、昇降板３５を開放させ、ハンドル把持部２３を回転させ、この回転駆動力を絶縁軸２０に伝えて高圧側着脱接触可動部の高圧端子を高圧導体の接続導体から切り離す。
【００５７】
他方、ガス絶縁開閉装置の主回路が通電中の場合、図６（ｃ）に示すように、制御指令部２４からクランプ３６に昇降板３５の押圧力解除指令が出ないので、クランプ３６から昇降板３５に押圧力を与えたまま、ハンドル装置３２をロックさせる。
【００５８】
このように、本実施形態は、電圧変成部の高圧端子を駆動する操作装置１９にハンドル装置３２を設けるとともに、このハンドル装置３２に昇降板３５とクランプ３６を備え、ガス絶縁開閉装置の主回路が通電中でないとき、制御指令部２４からクランプ３６に昇降板３５への押圧力解除指令を出し、ハンドル軸部３０を回転させる構成にしたので、高圧側着脱接触可動部の切離しを行う場合、急な操作によって発生する衝撃力に基づく高圧側着脱接触可動部等の絶縁破壊を防止でき、操作員の操作に伴う危険性を防止することができる。
【００５９】
図７は、本発明に係るガス絶縁計器用変圧器の第５実施形態を示す概念図である。なお、図７中、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｄ）は操作装置の作動手順を示す図である。また、第１実施形態の構成要素と同一構成要素には同一符号を付す。
【００６０】
本実施形態に係る操作装置１９は、ボックス状のケース２１内に収容され、容器１１から延びる絶縁軸２０と、この絶縁軸２０に設けたクラッチ板３７と、このクラッチ板３７を介して絶縁軸２０に接続するハンドル装置３２と、ガス絶縁開閉装置の主回路（図示せず）が通電しているとき、クラッチ板３７に与えていた軸結合に基づく摩擦力を解除する指令を出し、ガス絶縁開閉装置の主回路が無電状態のとき、クラッチ板３７に軸結合に基づく摩擦力を与える指令を出す制御指令部２４とで構成されている。なお、本実施形態は、操作装置１９にクラッチ板３７を設けているが、このクラッチ板３７に限らず電気粘性流体クラッチ３８でもよい。
【００６１】
また、差込み式ハンドル装置２７は、ハンドル軸部３０の一端を絶縁軸２０に接続し、他端にハンドル把持部２３とを備えている。
【００６２】
このような構成を備えたハンドル装置３２は、ガス絶縁開閉装置の課電試験開始のとき、ガス絶縁開閉装置の主回路に通電されていないことがわかると、図７（ｃ）に示すように、制御指令部２４からクラッチ板３７（電気粘性流体クラッチ３８）に軸結合の指令を出し、軸結合に基づく摩擦力を利用して図７（ｂ）に示すように、ハンドル把持部２３を矢印ＡＲの方向に回転させ、この回転駆動力を絶縁軸２０に伝えて高圧側着脱接触可動部の高圧端子を高圧導体の接続導体から切り離す。
【００６３】
他方、ガス絶縁開閉装置の主回路が通電中の場合、図７（ｄ）に示すように、制御指令部２４からクラッチ板３７（電気粘性流体クラッチ３８）に軸結合指令が出ないので、クラッチ板３７（電気粘性流体クラッチ３８）は切り離された状態になる。
【００６４】
したがって、ハンドル把持部２３からクラッチ板３７（電気粘性流体クラッチ３８）に回転力が与えられても、クラッチ板３７（電気粘性流体クラッチ３８）は絶縁軸２０と切り離されているので、その回転駆動力が絶縁軸２０に伝わらず、ハンドル装置３２をロック状態にさせる。
【００６５】
このように、本実施形態は、電圧変成部の高圧端子を駆動する操作装置１９にハンドル装置３２を設けるとともに、このハンドル装置３２にクラッチ板３７（電気粘性流体クラッチ３８）を備え、ガス絶縁開閉装置の主回路が通電中でないとき、制御指令部２４からクラッチ板３７（電気粘性流体クラッチ３８）に軸結合指令を出し、その際、軸結合に基づく摩擦力を利用してハンドル軸部３０を回転させる構成にしたので、高圧側着脱接触可動部の切離しを行う場合、操作装置の急な操作によって発生する衝撃力に基づく高圧側着脱接触可動部等の絶縁破壊を防止でき、操作員の操作に伴う危険性を防止することができる。
【００６６】
【発明の効果】
以上の説明のとおり、本発明に係るガス絶縁計器用変圧器は、電圧変成部の高圧端子を駆動する操作装置にハンドル装置を設け、このハンドル装置に、ガス絶縁開閉装置の主回路が無電状態のときロックを解除し、ガス絶縁開閉装置の主回路が通電中のときロックを維持させる手段を備えたので、高圧側着脱接触可動部の操作を危険な操作を伴わない安定した状態で行うことができる。
【図面の簡単な説明】
【図１】本発明に係るガス絶縁計器用変圧器の第１実施形態を示す縦断面図。
【図２】図１のＡ−Ａ矢視方向から切断した切断断面図。
【図３】本発明に係るガス絶縁計器用変圧器に適用する操作装置の概念図で、（ａ）は操作装置の部分図、（ｂ）は図３（ａ）のＢ−Ｂ矢視方向から見た平面図、（ｃ）〜（ｆ）は操作装置の作動手順を示す図。
【図４】本発明に係るガス絶縁計器用変圧器の第２実施形態を示す概念図で、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｄ）は操作装置の作動手順を示す図。
【図５】本発明に係るガス絶縁計器用変圧器の第３実施形態を示す概念図で、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｄ）は操作装置の作動手順を示す図。
【図６】本発明に係るガス絶縁計器用変圧器の第４実施形態を示す概念図で、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｄ）は操作装置の作動手順を示す図。
【図７】本発明に係るガス絶縁計器用変圧器の第５実施形態を示す概念図で、（ａ）は本発明に係るガス絶縁計器用変圧器に適用する操作装置の部分図、（ｂ）〜（ｄ）は操作装置の作動手順を示す図。
【図８】従来のガス絶縁計器用変圧器を示す概略縦断面図。
【符号の説明】
１ 容器
２ 電圧変成部
３ 絶縁スペーサ
４ 高圧導体
５ 高電圧側端部
６ 高圧端子
７ 接触導体
８ 操作装置
９ 絶縁棒
１０ 高圧側着脱接触可動部
１１ 容器
１２ 電圧変成部
１３ 高圧側着脱接触可動部
１４ 絶縁スペーサ
１５ 高圧側端子
１６ 高圧端子
１７ 高圧導体
１８ 接続導体
１９ 操作装置
２０ 絶縁軸
２１ ケース
２２ 折畳み式ハンドル軸部
２２ａ 第１折畳み式ハンドル軸部
２２ｂ 第２折畳み式ハンドル軸部
２３ ハンドル把手部
２４ 制御指令部
２５ ロックピン
２６ 支持ピン
２７ 差込み式ハンドル装置
２８ 差込み穴
２９ シャッタ
３０ ハンドル軸部
３１ 差込みピン
３２ ハンドル装置
３３ ガイド
３４ ストッパ
３５ 昇降板
３６ クランプ
３７ クラッチ板
３８ 電気粘性流体クラッチ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a gas-insulated instrument transformer that can be easily connected to and disconnected from a high-voltage circuit of a gas-insulated switchgear.
[0002]
[Prior art]
Conventionally, a gas-insulated instrument transformer is provided in a gas-insulated switchgear (GIS) and performs voltage transformation of a high-voltage circuit. In such a case, the gas-insulated switchgear has been disconnected from the high-voltage circuit or provided with an independent disconnecting device.
[0003]
Also, in recent transformers for gas-insulated instruments, the development of connection and disconnection mechanisms for gas-insulated switchgear with high-voltage circuits has been advanced, and gas-insulated switchgear has been developed even when it is still attached to the gas-insulated switchgear. An AC withstand voltage test of a device, a DC withstand voltage test of a cable, and the like can be performed, and the configuration thereof is shown in FIG. FIG. 8 shows a transformer for a three-phase gas insulation meter as an example.
[0004]
The three-phase gas-insulated instrument transformer includes a cylindrical container 1 filled with an insulating gas a and accommodating a three-phase voltage transformer 2, and a three-phase container provided on the top opening side of the cylindrical container 1. And a phase insulating spacer 3.
[0005]
The three-phase gas insulation meter transformer includes a high-voltage conductor 4 that penetrates while maintaining the air-tightness of the three-phase insulating spacer 3 provided in the cylindrical container 1, and at one end of the high-voltage conductor 4. The connection conductor 7 is provided. The other end of the high voltage conductor 4 is connected to a high voltage line (not shown) of the gas insulated switchgear.
[0006]
On the other hand, the voltage transforming section 2 includes a high voltage side detachable contact movable section 10 which is easily connected to and disconnected from the connection conductor 7 of the high voltage conductor 4.
[0007]
The high voltage side detachable contact movable portion 10 is provided at a high voltage side end 5 extending from the voltage transforming portion 2 toward the insulating spacer 3, and is provided at a tip of the high voltage side end 5, and slides freely. A high-voltage terminal 6 is provided to facilitate connection and disconnection of the high-voltage terminal 6 to and from the connection conductor 7 of the high-voltage conductor 4.
[0008]
Further, the three-phase gas insulation meter transformer includes an operation device 8 at a position opposite to the insulating spacer 3 provided on the top side of the cylindrical container 1.
[0009]
The operating device 8 includes an insulating rod 9 formed in a T-shape, and high-voltage terminals 6 provided at both ends of the T-shape.
[0010]
A three-phase gas insulation meter transformer having such a configuration moves the insulating rod 9 back and forth by the driving force of the operating device 8 as disclosed in Japanese Patent Application Laid-Open No. 2002-84610 (for example, see Patent Document 1). Since the high-voltage terminal 6 follows the forward / backward force, connection and disconnection between the high-voltage terminal 6 and the connection conductor 7 of the high-voltage conductor 4 can be performed freely.
[0011]
Therefore, in the conventional three-phase gas-insulated-instrument transformer, the high-voltage terminal 6 is reliably separated from the connection conductor 7 of the high-voltage conductor 4 during the power application test, so that the current is applied to the voltage transformer 2. There is no enough safe test.
[0012]
[Patent Document 1]
JP-A-2002-84610
[Problems to be solved by the invention]
By the way, the conventional three-phase gas-insulated instrument transformer can perform a sufficiently safe test because no current is applied to the voltage transformer 2 during the power application test, but it still has some problems. One of them is insufficient dielectric strength.
[0014]
Conventionally, the transformer for a three-phase gas-insulated instrument has been designed on the assumption that the high-voltage side detachable contact movable section 10 is disconnected in a non-electric state, so that the voltage transformer 2 is disconnected suddenly from the energized state. If this is done, the dielectric strength may be insufficient in the voltage transforming section 2 and the like, and dielectric breakdown may occur.
[0015]
Therefore, when driving the operating device 8, the three-phase gas insulation meter transformer checks whether or not the main circuit of the high-voltage side detachable contact movable unit 10 and the main circuit of the gas-insulated switchgear are in a non-conductive state. When connecting and disconnecting the side detachable contact movable part 10, it is necessary to confirm whether or not the gas insulated switchgear is energized, so that the operator is forced to work much more and the danger associated with energization.
[0016]
Under these circumstances, a three-phase gas-insulated instrument transformer has a protective safety device having a mechanism that cannot open and close the high-voltage side detachable contact movable unit 10 when, for example, the main circuit of the gas-insulated switchgear is energized. Was desired.
[0017]
The present invention has been made in view of such circumstances, and when connecting and disconnecting the high-pressure side detachable contact movable portion, prevents dielectric breakdown of the high-pressure side detachable contact movable portion and the like, and reduces the labor of the operator. It is another object of the present invention to provide a gas insulated instrument transformer that prevents danger in combination with the above.
[0018]
[Means for Solving the Problems]
The gas-insulated instrument transformer according to the present invention, in order to achieve the above object, as described in claim 1, to the high-voltage terminal of the voltage transformer accommodated in the container, from the outside of the container airtight. A gas-insulated instrument transformer, comprising: a high-pressure side detachable contact movable portion for making contact with and separation from an interposed connection conductor; and an operating device for operating the high-side detachable contact movable portion. While the high-voltage terminal is energized to a foldable handle shaft connected to the device and a lock mechanism provided on the foldable handle shaft, a lock command is issued to lock the foldable handle shaft, and the high-voltage terminal is A control command unit for issuing a lock release command to the lock mechanism to operate the folding handle shaft unit when there is no electricity;
[0019]
Further, in order to achieve the above object, in the gas insulation meter transformer according to the present invention, as described in claim 2, the foldable handle shaft portion is constituted by a plurality of handle shaft portions. One is provided with a support pin for rotatably supporting the handle grip.
[0020]
Further, in order to achieve the above-mentioned object, the gas insulated instrument transformer according to the present invention, as described in claim 3, is connected to a high-voltage terminal of a voltage transforming unit housed in a container from outside the container. A gas-insulated instrument transformer including a high-pressure side detachable contact movable portion that makes contact and separation with a connection conductor inserted airtightly and an operating device that operates the drive of the high-side detachable contact movable portion, The plug-in handle device to be inserted into the insulating shaft of the operating device, a shutter provided in the plug-in hole of the insulating shaft, and a high-voltage terminal that is energized, issues a command to close the plug-in hole to the shutter and issues the plug-in handle device. And a control command unit for operating the plug-in type handle device by issuing a command to open the insertion hole to the shutter when the high voltage terminal is locked and the high voltage terminal is in a non-conductive state.
[0021]
Further, in order to achieve the above object, the gas insulated instrument transformer according to the present invention is configured such that, as described in claim 4, a high-voltage terminal of a voltage transformer accommodated in a container is connected to a high-voltage terminal from outside the container. A gas-insulated instrument transformer including a high-pressure side detachable contact movable portion that makes contact and separation with a connection conductor inserted airtightly and an operating device that operates the drive of the high-side detachable contact movable portion, A handle device provided on the insulating shaft of the operating device and provided with a guide, a stopper for restricting and unrestricting the operation of the guide, and a protruding command is issued to the stopper while the high-voltage terminal is energized to issue the guide. A control finger that locks the handle device and, when the high-voltage terminal is in a non-conductive state, issues a sinking command to the stopper to unlock the guide and operate the handle device. It is obtained by a part.
[0022]
Further, in order to achieve the above object, the gas-insulated-instrument transformer according to the present invention is configured such that, as described in claim 5, a high-voltage terminal of a voltage transforming unit housed in a container is connected to the outside of the container. A gas-insulated instrument transformer including a high-pressure side detachable contact movable portion that makes contact and separation with a connection conductor inserted airtightly and an operating device that operates the drive of the high-side detachable contact movable portion, An elevating plate provided on the insulating shaft of the operating device and surrounded by a clamp, a handle device provided on the insulating shaft, and while the high-voltage terminal is energized, applies a pressing force to the clamp to restrain the elevating plate. And a control command section for operating the handle device by releasing the pressing force applied to the lifting plate from the clamp when the high-voltage terminal is in a non-conductive state.
[0023]
Further, in order to achieve the above-mentioned object, the gas-insulated-instrument transformer according to the present invention is configured such that, as described in claim 6, a high-voltage terminal of a voltage conversion unit housed in a container is connected to the outside of the container. A gas-insulated instrument transformer including a high-pressure side detachable contact movable portion that makes contact and separation with a connection conductor inserted airtightly and an operating device that operates the drive of the high-side detachable contact movable portion, The clutch plate provided on the insulating shaft of the operating device, the handle device provided on the insulating shaft, and the high-voltage terminal being energized, releasing the shaft coupling command to the clutch plate to lock the handle device, And a control command section for issuing a shaft coupling command to the clutch plate to operate the handle device when the terminal is in a non-conductive state.
[0024]
Further, in order to achieve the above object, the gas-insulated-meter transformer according to the present invention, as described in claim 7, is connected to the high-voltage terminal of the voltage transformer accommodated in the container from the outside of the container. A gas-insulated instrument transformer including a high-pressure side detachable contact movable portion that makes contact and separation with a connection conductor inserted airtightly and an operating device that operates the drive of the high-side detachable contact movable portion, The electrorheological fluid clutch provided on the insulating shaft of the operating device, the handle device provided on the insulating shaft, and the handle connection device is released and the handle device is locked while the high voltage terminal is energized. And a control command section for issuing a shaft coupling command to the electrorheological fluid clutch and operating the handle device when the high voltage terminal is in a non-conductive state.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a transformer for a gas insulation meter according to the present invention will be described with reference to the drawings and reference numerals attached to the drawings.
[0026]
FIG. 1 and FIG. 2 are conceptual diagrams showing a first embodiment of a transformer for a gas-insulated instrument according to the present invention. 1 is a longitudinal sectional view of a transformer for a gas-insulated instrument according to the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG. In addition, the transformer for a gas-insulated instrument according to the present embodiment is applied to a three-phase type as an example, but is not limited thereto, and may be applied to a single-phase or two-phase type.
[0027]
FIGS. 1 and 2 show a three-phase type gas-insulated instrument transformer according to the present embodiment, which is filled with an insulating gas and accommodates a three-phase voltage transformer 12 and a high-voltage detachable contact movable part 13. A container 11 is shown.
[0028]
The cylindrical container 11 includes an insulating spacer 14 connected to the high-pressure side detachable contact movable section 13 on the top opening side, and an operating device 19 connected to the voltage transforming section 12 on the opposite bottom side. I have.
[0029]
The high voltage side detachable contact movable portion 13 includes a high voltage side terminal 15 extending from the voltage transforming portion 12 toward the insulating spacer 14, and a high voltage terminal 16 provided at the tip of the high voltage side terminal 15 and slidably movable forward and backward. And a connection conductor 18 of a high-voltage conductor 17 disposed opposite to the high-voltage terminal 16, so that connection and disconnection of the connection conductor 18 can be easily performed.
[0030]
The insulating spacer 14 includes a high-voltage conductor 17 that penetrates while maintaining airtightness, and includes a connection conductor 18 at one end of the high-voltage conductor 17.
[0031]
The operating device 19 includes an insulating shaft 20 formed in a T-shape with branch arm shafts 20b and 20c and a drive shaft 20a as a trunk, and high-voltage terminals 16 and 16 connected to the arm shafts 20b and 20c. The connection (contact) and disconnection are performed on the connection conductor 18 of the high-voltage-side conductor contact movable portion 13.
[0032]
The configuration of the operating device 19 among the gas-insulated-meter transformers having such a configuration will be described in more detail.
[0033]
The operating device 19 is housed in a box-shaped case 21 and extends from the inside of the container 11, a foldable handle shaft 22 connected to the insulating shaft 20 and provided outside the case 21, The handle grip portion 23 mounted on the handle shaft portion 22 and a control command portion 24 for giving a lock command to the folding handle shaft portion 22 when a main circuit (not shown) of the gas insulated switchgear is energized. It is configured.
[0034]
Further, as shown in FIGS. 3B to 3G, the foldable handle shaft portion 22 is divided into a first foldable handle shaft portion 22a and a second foldable handle shaft portion 22b so as to be foldable. And a lock pin 25 that locks the second foldable handle shaft portion 22b when the second foldable handle shaft portion 22b is folded onto the first foldable handle shaft portion 22a.
[0035]
FIG. 3E shows that the folding handle shaft portion 22 having such a configuration is not energized to the main circuit of the gas insulated switchgear at the start of the power application test of the gas insulated switchgear. As shown in the figure, a lock release command is given to the lock pin 25 of the second foldable handle shaft portion 22b from the control command portion 24, and based on this command, as shown in FIG. The portion 22b is opened from the first foldable handle shaft portion 22a, and further raised via a support pin 26 that rotatably supports the handle grip 23, as shown in FIG. 3C.
[0036]
When the preparation of the folding handle shaft portion 22 is completed, the operating device 19 rotates the handle grip portion 23 in the direction of the arrow AR as shown in FIG. 3B, and transmits this rotational driving force to the insulating shaft 20. Then, the high voltage terminal of the high voltage side detachable contact movable portion is separated from the connection conductor of the high voltage conductor.
[0037]
On the other hand, when the main circuit of the gas insulated switchgear is energized, the second folding handle shaft portion 22b does not output the lock release command from the control command portion 24 as shown in FIG. It is locked while being folded by the one folding handle shaft portion 22a.
[0038]
As described above, in the present embodiment, the lock mechanism is provided on the folding handle shaft portion 22 of the operating device 19 for driving the high-voltage terminal of the voltage transformer, and when the main circuit of the gas insulated switchgear is not energized, the control command portion is provided. Since the lock release command is issued from the lock handle 25 to the lock pin 25 of the folding handle shaft portion 22, when the high pressure side detachable contact movable portion is disconnected, the high pressure side detachable contact movable based on the impact force generated by a sudden operation. It is possible to prevent the dielectric breakdown of the parts and the like, and it is possible to prevent the danger accompanying the operation of the operator.
[0039]
FIG. 4 is a conceptual diagram showing a second embodiment of the gas insulated instrument transformer according to the present invention. In addition, in FIG. 4, (a) is a partial view of the operating device applied to the transformer for a gas-insulated instrument according to the present invention, and (b) to (l) are diagrams showing the operation procedure of the operating device. The same components as those of the first embodiment are denoted by the same reference numerals.
[0040]
The operating device 19 according to the present embodiment is housed in a box-shaped case 21 and extends from the container 11, an insertable handle device 27 that can be connected to and disconnected from the insulating shaft 20, and a gas insulated switchgear. When the main circuit (not shown) is energized, the insertion hole 28 provided in the case 21 is closed, and when the main circuit of the gas insulated switchgear is in a non-conductive state, the insertion hole 28 provided in the case 21 is opened. And a control command section 24 for giving an opening / closing control command to the shutter 29.
[0041]
Further, as shown in FIG. 4B, the plug-in type handle device 27 includes a plug-in pin 31 at one end of the handle shaft 30 and a handle grip 23 at the other end.
[0042]
When it is found that the main circuit of the gas-insulated switchgear is not energized at the start of the power application test of the gas-insulated switchgear, the plug-in handle device 27 having such a configuration is shown in FIG. Thus, the unlock command is given to the shutter 29 from the control command unit 24, and the shutter 29 moves to the position shown in the figure.
[0043]
When the shutter 29 moves to the illustrated position and the insertion hole 28 provided in the case 21 is opened, the insertion-type handle device 27 causes the insertion pin 31 of the handle shaft 30 to pass through the insertion hole 28.
[0044]
When the preparation of the plug-in type handle device 27 is completed, the operating device 19 rotates the handle grip 23 in the direction of the arrow AR, and transmits this rotational driving force to the insulating shaft 29 to connect the high voltage terminal of the high voltage side detachable contact movable portion. Disconnect from the connection conductor of the high voltage conductor.
[0045]
On the other hand, when the main circuit of the gas insulated switchgear is energized, the shutter 29 remains closed because there is no lock release command from the control command unit 24 as shown in FIG. For this reason, the insertion hole 28 provided in the case 21 is kept closed by the shutter 29, so that insertion of the insertion type handle device 27 is prevented.
[0046]
As described above, in the present embodiment, the operating device 19 for driving the high-voltage terminal of the voltage conversion unit is provided with the insertion-type handle device 27, and the insertion hole 28 provided in the case 21 is provided with the shutter 29. When the main circuit is not energized, an unlock command is issued from the control command unit 24 to the shutter 29, and the plug-in handle device 27 is inserted through the plug hole 28. In this case, it is possible to prevent dielectric breakdown of the high-pressure side detachable contact movable portion based on an impact force generated by a sudden operation, and to prevent danger associated with the operation of the operator.
[0047]
FIG. 5 is a conceptual diagram showing a third embodiment of the gas insulated instrument transformer according to the present invention. In addition, in FIG. 5, (a) is a partial view of the operating device applied to the transformer for a gas-insulated instrument according to the present invention, and (b) to (c) are diagrams showing the operation procedure of the operating device. The same components as those of the first embodiment are denoted by the same reference numerals.
[0048]
The operating device 19 according to the present embodiment is housed in a box-shaped case 21 and extends from the container 11, an insertion handle device 27 provided on the insulating shaft 20, and a main circuit of the gas insulated switchgear. A stopper 34 is provided to lock the guide 33 provided on the case 32 when the power is supplied to the handle 32 (not shown), and to open the guide 33 provided on the handle device 32 when the main circuit of the gas insulated switchgear is in a non-conductive state. When the main circuit of the gas insulated switchgear is energized to the stopper 34, a protruding command is issued to the stopper 34, the guide 34 is moved to the position "a" to lock the guide 33, and the main circuit of the gas insulated switchgear is turned off. In this state, the control command unit 24 issues a sinking command to the stopper 34, moves to the position “b”, and opens the guide 33.
[0049]
The handle device 32 has one end of the handle shaft 30 connected to the guide 33 and the other end provided with the handle grip 23.
[0050]
When it is found that the main circuit of the gas-insulated switchgear is not energized at the start of the power application test of the gas-insulated switchgear, the handle device 32 having such a configuration as shown in FIG. Then, a sink command is issued from the control command unit 24 to the stopper 34, the stopper 34 sinks to the position "b", the guide 33 is synchronized with the handle shaft 30, and the handle grip 23 is rotated in the direction of the arrow AR. Then, the rotational driving force is transmitted to the insulating shaft 20 to disconnect the high voltage terminal of the high voltage side detachable contact movable portion from the connection conductor of the high voltage conductor.
[0051]
On the other hand, when the main circuit of the gas insulated switchgear is energized, the lock release command is not issued to the stopper 34 from the control command unit 24 as shown in FIG. Then, the handle device 32 is locked.
[0052]
As described above, in the present embodiment, the handle device 32 is provided on the operating device 19 that drives the high-voltage terminal of the voltage transformer, and the handle device 32 is provided with the guide 33 and the stopper 34, and the main circuit of the gas insulated switchgear is provided. When power is not being supplied, the control command unit 24 issues a sinking command to the stopper 34 and rotates the handle shaft 30 in synchronization with the guide 33. Therefore, when disconnecting the high-pressure side detachable contact movable unit, It is possible to prevent dielectric breakdown of the high-pressure side detachable contact movable portion and the like based on the impact force generated by a simple operation, and to prevent the danger accompanying the operation of the operator.
[0053]
FIG. 6 is a conceptual diagram showing a fourth embodiment of the gas insulated instrument transformer according to the present invention. 6A is a partial view of an operating device applied to the transformer for a gas-insulated instrument according to the present invention, and FIGS. 6B to 6C are diagrams showing an operation procedure of the operating device. The same components as those of the first embodiment are denoted by the same reference numerals.
[0054]
The operation device 19 according to the present embodiment is housed in a box-shaped case 21 and extends through the insulating shaft 20 from the container 11, a clamp 36 surrounding a lifting plate 35 provided on the insulating shaft 20, and When the handle device 32 connected to the insulating shaft 20 and the main circuit (not shown) of the gas insulated switchgear are energized, the lifting plate 35 is locked from the clamp 36, and the main circuit of the gas insulated switchgear is turned off. In the state, the control unit 24 is configured to release the pressing force applied from the clamp 36 to the elevating plate 35 and issue a release command to the elevating plate 35.
[0055]
The handle device 32 has one end of the handle shaft 30 connected to the insulating shaft 20 and the other end provided with the handle grip 23.
[0056]
When it is found that the main circuit of the gas insulated switchgear is not energized at the start of the power application test of the gas insulated switchgear, the handle device 32 having such a configuration as shown in FIG. Then, a command to release the pressing force of the elevating plate 35 is issued from the control instruction unit 24 to the clamp 36, the elevating plate 35 is opened, the handle grip 23 is rotated, and this rotational driving force is transmitted to the insulating shaft 20, and the high-pressure side is transmitted. The high voltage terminal of the detachable contact movable part is separated from the connection conductor of the high voltage conductor.
[0057]
On the other hand, when the main circuit of the gas insulated switchgear is energized, as shown in FIG. 6 (c), there is no command to release the pressing force of the elevating plate 35 from the control command unit 24 to the clamp 36. The handle device 32 is locked while the pressing force is applied to the plate 35.
[0058]
As described above, in the present embodiment, the handle device 32 is provided in the operating device 19 that drives the high-voltage terminal of the voltage transformer, and the handle device 32 is provided with the lifting plate 35 and the clamp 36, and the main circuit of the gas insulated switchgear is provided. When is not energized, the control command unit 24 issues a pressing force release command to the lifting plate 35 to the clamp 36 to rotate the handle shaft unit 30.Therefore, when disconnecting the high pressure side detachable contact movable unit, It is possible to prevent dielectric breakdown of the movable portion on the high-pressure side, which is based on an impact force generated by a sudden operation, and to prevent a risk associated with the operation of the operator.
[0059]
FIG. 7 is a conceptual diagram showing a fifth embodiment of the gas insulated instrument transformer according to the present invention. FIG. 7A is a partial view of an operating device applied to the transformer for a gas-insulated instrument according to the present invention, and FIGS. 7B to 7D are diagrams showing the operation procedure of the operating device. The same components as those of the first embodiment are denoted by the same reference numerals.
[0060]
The operating device 19 according to the present embodiment includes an insulating shaft 20 that is housed in a box-shaped case 21 and extends from the container 11, a clutch plate 37 provided on the insulating shaft 20, and an insulating shaft via the clutch plate 37. When the handle device 32 connected to the motor 20 and the main circuit (not shown) of the gas insulated switchgear are energized, a command to release the frictional force based on the shaft coupling given to the clutch plate 37 is issued, When the main circuit of the switchgear is in a non-conductive state, the control unit 24 is configured to issue a command for giving a frictional force based on shaft coupling to the clutch plate 37. In the present embodiment, the operating device 19 is provided with the clutch plate 37, but the present invention is not limited to this clutch plate 37 and may be an electrorheological fluid clutch 38.
[0061]
The plug-in type handle device 27 has one end of the handle shaft 30 connected to the insulating shaft 20 and the other end provided with the handle grip 23.
[0062]
When it is found that the main circuit of the gas insulated switchgear is not energized at the start of the power application test of the gas insulated switchgear, the handle device 32 having such a configuration as shown in FIG. Then, a command for shaft connection is issued from the control command unit 24 to the clutch plate 37 (the electrorheological fluid clutch 38), and the frictional force based on the shaft connection is used to move the handle grip 23 as shown in FIG. It is rotated in the direction of AR, and this rotation driving force is transmitted to the insulating shaft 20 to disconnect the high voltage terminal of the high voltage side detachable contact movable portion from the connection conductor of the high voltage conductor.
[0063]
On the other hand, when the main circuit of the gas insulated switchgear is energized, no shaft coupling command is issued from the control command unit 24 to the clutch plate 37 (the electrorheological fluid clutch 38) as shown in FIG. The plate 37 (the electrorheological fluid clutch 38) is disengaged.
[0064]
Therefore, even if a rotational force is applied to the clutch plate 37 (the electro-rheological fluid clutch 38) from the handle grip 23, the clutch plate 37 (the electro-rheological fluid clutch 38) is separated from the insulating shaft 20, so that its rotational drive is performed. The force is not transmitted to the insulating shaft 20, and the handle device 32 is locked.
[0065]
As described above, in the present embodiment, the handle device 32 is provided in the operating device 19 that drives the high-voltage terminal of the voltage conversion unit, and the handle device 32 is provided with the clutch plate 37 (the electrorheological fluid clutch 38), and the gas insulated switchgear is provided. When the main circuit of the device is not energized, the shaft command is issued from the control command unit 24 to the clutch plate 37 (the electrorheological fluid clutch 38). At this time, the handle shaft 30 is moved using the frictional force based on the shaft connection. When the high-pressure side detachable contact movable part is cut off, the dielectric breakdown of the high-pressure side detachable contact movable part etc. based on the impact force generated by the sudden operation of the operating device can be prevented, and the operation by the operator can be prevented. Can be prevented.
[0066]
【The invention's effect】
As described above, the gas insulated instrument transformer according to the present invention is provided with a handle device in the operating device that drives the high-voltage terminal of the voltage transformer, and the handle device has the main circuit of the gas insulated switchgear in a non-conductive state. Means to release the lock when the main circuit of the gas insulated switchgear is energized and maintain the lock when the main circuit of the gas insulated switchgear is energized. Can be.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a transformer for a gas-insulated instrument according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1;
3A and 3B are conceptual diagrams of an operating device applied to a transformer for a gas-insulated instrument according to the present invention, wherein FIG. 3A is a partial view of the operating device, and FIG. (C)-(f) is a diagram showing an operation procedure of the operating device.
FIG. 4 is a conceptual diagram showing a second embodiment of the gas insulated instrument transformer according to the present invention, in which (a) is a partial view of an operating device applied to the gas insulated instrument transformer according to the present invention, and (b). FIGS. 4A to 4D are diagrams showing an operation procedure of the operation device.
5A and 5B are conceptual views showing a third embodiment of the gas insulated meter transformer according to the present invention, wherein FIG. 5A is a partial view of an operating device applied to the gas insulated meter transformer according to the present invention, and FIG. FIGS. 4A to 4D are diagrams showing an operation procedure of the operation device.
FIG. 6 is a conceptual diagram showing a fourth embodiment of the gas insulated meter transformer according to the present invention, wherein (a) is a partial view of an operating device applied to the gas insulated meter transformer according to the present invention, and (b). FIGS. 4A to 4D are diagrams showing an operation procedure of the operation device.
FIG. 7 is a conceptual diagram showing a fifth embodiment of a gas-insulated-meter transformer according to the present invention, wherein (a) is a partial view of an operating device applied to the gas-insulated-meter transformer according to the present invention, and (b). FIGS. 4A to 4D are diagrams showing an operation procedure of the operation device.
FIG. 8 is a schematic longitudinal sectional view showing a conventional transformer for a gas-insulated instrument.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 2 Voltage transformer 3 Insulating spacer 4 High voltage conductor 5 High voltage side end 6 High voltage terminal 7 Contact conductor 8 Operating device 9 Insulating rod 10 High voltage side detachable contact movable part 11 Container 12 Voltage transformer 13 High voltage side detachable contact movable part 14 Insulating spacer 15 High-voltage terminal 16 High-voltage terminal 17 High-voltage conductor 18 Connection conductor 19 Operating device 20 Insulating shaft 21 Case 22 Foldable handle shaft 22a First foldable handle shaft 22b Second foldable handle shaft 23 Handle handle 24 Control command unit 25 Lock pin 26 Support pin 27 Plug-in handle device 28 Insert hole 29 Shutter 30 Handle shaft 31 Plug-in pin 32 Handle device 33 Guide 34 Stopper 35 Elevating plate 36 Clamp 37 Clutch plate 38 Electro-rheological fluid clutch
