201145737 六、發明說明： 【發明所屬之技術領域】 本發明係關於具備雙重母線之開關器，進而詳言之， 係關於具備以固體絕緣母線形成的雙重母線之開關器。 【先前技術】 於生產電算機相關機器的工廠或醫院等機關，被要求 著對於各種負荷下之安定的電力供給，所以電源設備的重 要性很高。 作爲這樣的機關之高壓受電設備的開關器，爲了提高 給電的可信賴性，有一種即使在事故發生時，也可以縮短 通往負荷的停電時間之雙重母線型式的開關器（例如，請 參照專利文獻1 )。例如，藉由使一方指母線以從電力公 司接收的電力來充電，使另一方的母線以來自自家發電設 備等的接收電力來充電’即使由於落雷等事故導致來自電 力公司的電力供應被中斷，也可以藉由切換至另一方母線 ，而繼續對負荷供給電力。 [先前技術文獻] [專利文獻] [專利文獻1 ]日本專利特開平6 — 3 1 1 6 1 4號公報 【發明內容】 [發明所欲解決之課題] -5- 201145737 前述之開關器’具備：單側被連接於上部母線的上部 斷路器、單側被連接於下部母線的下部斷路器、以及被連 接於此下部斷路器的另一側與上部斷路器的另一側的遮斷 器：將此遮斷器收容於上部斷路器與下部斷路器之間，所 以例如在上部母線或上部斷路器發生事故時，可以把上部 斷路器開極’透過下部斷路器及下部母線與遮斷器對負荷 供給電力。結果，可以減少單側的斷路器或導體之事故導 致之停止對負荷供給電力的時間。 但是’事故部分之上部母線或上部斷路器之永久性修 復作業，爲了要確保安全性，必須要在停止負荷的運作之 夜間或者是定期檢修時，使上部母線及下部母線停電再進 行》此外，構成開關器的筐體內的各機器的檢修作業，在 很多場合，爲了要確保筐體內作業的安全性，也都是使上 部母線及下部母線停電後再進行。 總之，於前述的狀況下，有必要停止對負荷供電，會 有很難縮短此停電時間的問題。 於具備這樣的雙重母線的開關器，期待著可以不用停 止對負荷供電就可以進行內部事故後之永久性的修復作業 ，同樣的還期待可以進行筐體內的各機器的檢修之開關器 〇 本發明係有鑑於前述事項而爲之發明，目的在於提供 使筐體內之各機器的檢點或相關於一方的母線之作業，可 以在不停止對負荷之給電的情況下實施之具備雙重母線的 開關器。 6 - 201145737 [供解決課題之手段] 爲了達成前述目的，第1發明之開關器，係將主母線 配置於上下方向之雙重母線形式之開關器，具備：具有藉 由接地金屬板而區劃形成於正面側的機器室與區劃形成於 背面側的母線室之筐體、於前述筐體之母線室內的上部與 下部，分別被配置於前述筐體的寬幅方向，以固體絕緣物 覆蓋導體使其表面爲接地電位之上部主母線與下部主母線 、被配置於前述機器室內，具有透過被固體絕緣的聯絡母 線使一方側被連接於前述上部主母線的遮斷器之上部開閉 器單元、被配置於前述機器室內，具有透過被固體絕緣的 聯絡母線使一方側被連接於前述下部主母線的遮斷器之下 部開閉器單元、以及被配置於前述母線室內，一方端被連 接於前述上部開閉器單元之另一方側與前述下部開閉器單 元之另一方側，另一方端被連接於纜線之被固體絕緣的拉 出母線；使前述上部開閉器單元之遮斷器與前述下部開閉 器單元的遮斷器，導電地串聯連接於前述上部主母線與前 述下部主母線之間。 此外，第2發明，特徵係於第1發明，藉由進行列盤構 成，使複數之前述上部開閉器單元之遮斷器被導電地並聯 連接於前述上部主母線，複數之前述下部開閉器單元之遮 斷器被導電地並聯連接於前述下部主母線。 進而第3發明，特徵爲在第1或第2發明，前述聯絡母 線及拉出母線，也是以固體絕緣物覆蓋導體使其表面電位 201145737 爲接地電位》 此外，第4發明，特徵係於第1至第3發明之任一，前 述固體絕緣物爲矽橡膠（siliconerubber)。 進而，第5發明，特徵係於第1至第4發明之任一，前 述固體絕緣物爲環氧樹脂。 [發明之效果] 根據本發明的話，因爲構成爲將一方之固體絕緣母線 配置於筐體內之上部側，將另一方之固體絕緣母線配設於 筐體內之下部側而具備雙重母線之開關器，所以可提供小 型·重量輕·可信賴性高，可以使筐體的各機器的檢修或 者相關於一方母線的作業，在不停止對負荷的供電的情況 下來實施之開關器。 【實施方式】 以下，使用圖面說明本發明之開關器之實施型態。 圖1係顯示本發明之開關器之一實施型態的構成之配 線圖。於圖1，本發明之開關器之一實施型態，係列盤構 成對負荷供給電源之配電盤1等，將母線配線於上下方向 之雙重母線型式的.開關器，各配電盤1，大致構成爲包括 於各配電盤1的上部連通往鄰接盤的第1母線2、於各配電 盤1的下部連通往鄰接盤的第2母線3、單側被連接於第1母 線2的上部遮斷器4、單側被連接於第2母線3的下部遮斷器 5、被連接於此上部遮斷器4的另一側與下部遮斷器5的另 201145737 一側的第3母線6、以及被連接於第3母線6之對各負荷供給 電力的電力纜線7。其係導電地把上部遮斷器4與下部遮斷 器5，串聯連接於第1母線2與第2母線3之間，藉由列盤構 成’複數之上部遮斷器4，4，. ·.被導電地並聯連接於 第1母線2，複數之下部遮斷器5，5，·..被導電地並聯 連接於第2母線3。 於通常運用時，以例如來自不同的系統的電源充電第 1母線2與第2母線3，投入上部遮斷器4或下部遮斷器5之任 一方而對負荷供給電力。在來自單方的系統的給電停止的 場合，雖然一方的母線是停電的，但釋放被連接於停電側 的母線之遮斷器，投入連接於充電側的母線之遮斷器，可 以繼續對負荷供給電力。 於本實施型態，第1母線2、第2母線3、以及第3母線6 之分別的母線構件，使用以固體絕緣物絕緣母線導體的外 周部使成爲接地電位之相同規格的固體絕緣母線。 其次，使用圖2至圖4詳細說明本發明之開關器之一實 施型態。 圖2至圖4係顯示本發明之開關器的實施型態之圖，圖 2係顯示本發明之開關器之一實施型態之縱剖面圖，圖3係 顯示圖2所示之本發明之開關器之一實施型態之槪略配線 圖，圖4係顯示本發明之開關器之一實施型態之背面圖。 於圖2及圖3，開關器之筐體11，藉由接地金屬板之隔 板1 2被區隔爲正面側與背面側，於背面側（圖2之左側） 被區劃形成母線室1 6，於母線室1 6的上部側與下部側，進 201145737 而藉由蓋1 3、1 3區劃形成上部母線室1 6 A與下部母線室 16B。另一方面，於正面側（圖2之右側）的上下，進而藉 由密閉蓋14、14區劃形成2個機器室15、15。此密閉蓋14 之設置目的，主要在於防止作業員等遭遇來自遮蔽器等充 電部的觸電事故。此外，密閉蓋14上安裝膠墊等的話可以 使機器室15防塵化。結果，可以謀求機器室15的清掃之省 力化。於筐體1 1的前面側，設有可開閉的正面門1 1 A，同 樣地於背面側，設有可開閉之背面門1 1 B。此外，在機器 室15、15與正面門1 1 A的背側之間，被區劃形成控制室17 。於正面門1 1 A，被安裝著保護控制器26。 於機器室15、15的底部，分別於隔板12與筐體1 1的兩 側面內側配置使外周之3個邊被固定之約略矩形的支撐板 18、18。於此支撐板18、18之上，分別載置著2個開閉器 單元19、19。開閉器單元19，係由進行電源電路的電流遮 斷之真空遮斷器（VCB) 20之遮斷部21a、進行遮斷部21a 的開閉操作之真空遮斷器20的操作器21、被配置於真空遮 斷器20的負荷側的端子之變流器（CT ) 22、以及被配置 於真空遮斷器20的電源側的端子之零相變流器（ZCT) 23 所構成。 2個開閉器單元1 9、1 9於分別的前面側（圖1之右側） 具有正面蓋41。於此正面蓋41，於其上下方向約略中央處 被安裝著棒狀的拉出把手25。2個開閉器單元19、19分別 被搭載於平板車24。此外，於平板車24’於其上部，以覆 蓋住真空遮斷器20與操作器2 1的正面側與兩側面之3面的 -10- 201145737 外周的方式立起設有框架27。於此框架2 7被安裝著變流器 21、零相變流器22。 構成前述的開閉器單元19的真空遮斷器20、變流器22 、零相變流器23，如圖3所室被串聯連接。零相變流器23 ，被配置於真空遮斷器20的電源側，變流器22被配置於真 空遮斷器20的負荷側。 於開閉器單元1 9的背部，如圖2所示，被配置著連接 於真空遮斷器20的可動電極側（下側）的端子28、與連接 於真空遮斷器20的固定電極側（上側）的端子29。這些端 子28、29，透過大氣中斷路用絕緣襯（bushing )部可接 離地被連接於連接在後述的上部及下部的母線室16A、 1 6 B內的主母線3 0之聯絡母線3 1、輔助聯絡母線3 2。 於圖2，在上部及下部母線室16A、16B內，3相之被 固體絕緣的上部主母線30A、下部主母線30B透過作爲連 接構件的連接轉接器34、34，分別被配設爲與筐體11的前 面平行（於圖2係與紙面直交的方向）。於此上部及下部 主母線30A、30B，透過連接轉接器34、34被連接著固體 絕緣的聯絡母線3 1、3 1之一端。此聯絡母線3 1之另一端， 分歧爲一方側的連接端子31a與另一方側的連接端子31b。 被連接於上部主母線3〇A的聯絡母線31之另一方側的連接 端子31a，以可與上側的開閉器單元19的端子29接離的方 式被導入機器室15內。被連接於下部主母線30B的聯絡母 線3 1之一方側的連接端子3 1 b ’以可與下側的開閉器單元 19的端子28接離的方式被導入機器室15內。 -11 - 201145737 此外，在上部母線室16A的下側，且爲下部母線室 1 6B的上側，配置著被固體絕緣的輔助聯絡母線32。於此 輔助聯絡母線3 2，有後述之拉出母線3 3的一端之連接端子 3 3 a連接的連接部32a被形成於中間部，可與開閉器單元19 的端子接離的連接端子3 2b、3 2c被形成於兩端部。以上段 的開閉器單元19的下側端子28與下段的開閉器單元19的上 側端子29可以接離的方式使輔助聯絡母線32的連接端子 3 2b與3 2 c分別被導入機器室15內。進而，於輔助聯絡母線 32的後部被配置著固體絕緣的拉出母線33。於此拉出母線 33的一端設有連接端子33a，此連接端子33 a在前述之輔助 聯絡母線32的連接部32a被連接。拉出母線33的另一端， 被連接於纜線39的一端被連接之纜線頭38。此纜線39的另 —端往筐體11的下方拉出，連接於負荷。 上部主母線30A、下部主母線30B、聯絡母線31、輔 助聯絡母線3 2、拉出母線3 3之各個，係將銅之導體以例如 矽橡膠或者環氧樹脂等固體絕緣物覆蓋，於其表面塗佈導 電塗料，同時爲接地電位。這些母線，藉由這樣的絕緣而 被無氣化，不需要氣體管理所以操作性變佳，同時即使於 母線室16內混入粉塵或異物，也因爲維持絕緣性的緣故可 以確保安全性，同時節省維修、謀求檢修的省力化》 此外，於本實施型態，將上下2段的開閉器單元19、 19配置於上部主母線30A與下部主母線30B的上下方向的 中間。藉此，例如，即使在上下任一方之主母線，或者開 閉器單元發生事故的場合，也可以繼續對負荷之供電，同 -12- 201145737 時實施事故部位的修復作業。 開關器’於其背面圖如圖4所不，顯不構成開關器的 列盤、被固體絕緣的上部主母線3 0 A、下部主母線3 0B、 聯絡母線3 1、輔助聯絡母線3 2、拉出母線3 3與各機器室1 5 的背面部之連接配置狀態。此處，構成各盤的筐體11的寬 幅方向（圖4的左右方向）的寬幅，被形成約600mm，可 謀求小型·輕重量化。此外，列盤構成之上部主母線3 0 A 、下部主母線30B之連接，係以由兩鄰之盤延伸的這些主 母線30A、30B之一端在水平方向的開口部連接之T字形的 連接轉接器34來進行的。又，此固體絕緣母線30的絕緣規 格係額定電壓24kV者，提高安全性與可信賴性，同時也 不需要母線的清掃等作業。 其次，使用圖5說明前述之本發明之構成開關器的開 閉器單元1 9之詳細內容。圖5係顯示構成本發明之開關器 之一實施型態的開閉單元之縱斷側面圖。於圖5，因爲與 圖1至圖4所示之符號爲相同符號者是同一部分，所以省略 其詳細的說明。 構成開閉器單元19的真空遮斷器20，被搭載於具有4 個車輪的平板車24，係以被配置於平板車24的前側之操作 器21，以及由被配置於其後部的3個絕緣筒40構成的遮斷 部21a所形成的。於操作器21的前面，被設有正面蓋41， 於其上下方向約略中央處被安裝著棒狀的拉出把手25。 於真空遮斷器2 0的遮斷部2 1 a，例如於上側被水平地 安裝著3個固定電極側端子2 9，於下側被水平地安裝著3個 -13- 201145737 可動電極側端子28。 於框架27的上部，被安裝著分別覆蓋3相之中的2相之 固定電極側端子29的變流器22、22，於下部，被安裝著以 1個鐵芯覆蓋3相之可動電極側端子28的跑道形零相變流器 23。此外，於框架27的側部，將半橢圓狀的缺口 46在上下 方向上設於2個處所。這是爲了避免因爲在真空遮斷器20 的外周設置框架27而導致絕緣性能降低的目的而設置的。 其次，使用圖6說明前述之本發明的開關器之筐體內 的機器在檢修時的動作。圖6係說明本發明之開關器之一 實施型態的機器檢修時的動作之配線圖。於圖6，因爲與 圖2至圖4所示之符號爲相同符號者是同一部分，所以省略 其詳細的說明。 以下說明檢修跨開關器的列盤之上部主母線30A，與 特定的盤之上段的開閉器單元19的場合。 (1 )如圖6所示，進行透過下段的真空遮斷器20、20 、· ··由下部主母線30B進行對各負荷的供電之電路構 成。 (2 )上段之真空遮斷器20、20、· · ·全部爲開放 狀態，使上部主母線3 0 A爲停電狀態。 (3)把被配設上段的真空遮斷器20的上段之開閉器 單元19、19、19. . •由筐體11、11、...拉出而配置 於斷路位置。 (4 )取下圖2所示之上部母線室16A的蓋13，進行上 部主母線30A的檢修。 -14- 201145737 (5)檢修結束後，安裝上部母線室16A之蓋13，依 照前述（3 ) ’ （ 2 ) ，（ 1 )的順序進行復原作業。 固體絕緣母線，藉由以固體絕緣物覆蓋導體的周圍， 於其表面塗布導電塗料，使表面成爲接地電位，使得即使 人體誤觸母線也不會發生感電事故。藉由使用此固體絕緣 母線構成上部主母線3 0 A、下部主母線3 0B、聯絡母線3 1 、輔助聯絡母線3 2、拉出母線3 3，而成爲沒有暴露的高壓 部之構造。 因此，在如前所述進行上部主母線3 0 A，或上段的開 閉器單元1 9的檢修時，也沒有必要開放下段的真空遮斷器 20，可以在繼續對負荷供給電力的狀態下進行檢修作業。 此外，從前的雙重母線之開關器，與通常的開關器相比， 在母線間必須要留有絕緣距離，所以設置空間的縮小化是 困難的。於本實施型態，使用固體絕緣母線，所以設置空 間的縮小化變成可能。 根據前述之本發明的開關器之一實施型態的話，因爲 構成爲將一方之固體絕緣母線配置於筐體內之上部側，將 另一方之固體絕緣母線配設於筐體內之下部側而具備雙重 母線之開關器，所以可提供小型·重量輕·可信賴性高， 可以使筐體1 1的各機器的檢修或者相關於一方母線的作業 ，在不停止對負荷的供電的情況下來實施之開關器。 此外，根據前述之本發明之開關器之一實施型態的話 ，因爲將上下2段之開閉器單元19、19配置於上部主母線 30A與下部主母線30B之上下方向的中間，所以例如在上 -15- 201145737 下之任一方的主母線’或是在開閉器單元發生事故的場合 ，也可以藉由單方的母線與開閉器單元繼續對負荷供電， 同時實施事故部位的復原作業。 【圖式簡單說明】 圖1係顯示本發明之開關器之一實施型態的構成之配 線圖" 圖2係顯示本發明之開關器之一實施型態之縱剖面圖 〇 圖3係顯示圖2所示之本發明之開關器之一實施型態之 槪略配線圖。 圖4係顯示本發明之開關器之—實施型態之背面圖。 圖5係顯示構成本發明之開關器之一實施型態的開閉 單元之側面圖。 圖6係說明本發明之開關器之一實施型態的機器檢修 時的動作之配線圖。 【主要元件符號說明】 1 :配電盤 2:第〗母線 3 :第2母線 4 :上部遮斷器 5 :下部遮斷器 6 :第3母線 -16- 201145737 1 1 :筐體 1 2 :隔板 13 :蓋 1 4 :密閉蓋 15 :機器室 1 6 :母線室 〗7 :控制室 18 :支撐板 1 9 :關閉器單元 20 :真空遮斷器 2 1 :操作器 22 :變流器 23 :零相變流器 24 :平板車 3 0 :主母線 30A :上部主母線 3 0 B :下部主母線 3 1 :聯絡母線 32 :輔助聯絡母線 3 3 :拉出母線 -17201145737 VI. Description of the Invention: [Technical Field] The present invention relates to a switch having a double bus bar, and more particularly to a switch having a double bus bar formed of a solid insulated bus bar. [Prior Art] Power plants are required to be highly reliable for power supply under various loads, such as factories or hospitals that produce computer-related equipment. In order to improve the reliability of power supply, a switch for a high-voltage power receiving device of such a mechanism has a double bus type switch that can shorten the power-off time to the load even in the event of an accident (for example, refer to the patent) Literature 1). For example, by charging one of the finger busbars with electric power received from the electric power company, the other bus bar is charged with the received electric power from the electric power generating equipment or the like 'even if the electric power supply from the electric power company is interrupted due to an accident such as lightning strike, It is also possible to continue to supply power to the load by switching to the other bus. [Prior Art Document] [Patent Document 1] Japanese Patent Laid-Open No. Hei 6-3 1 1 6 1 4 [Invention] [Problems to be Solved by the Invention] -5- 201145737 The aforementioned switcher is provided : an upper breaker connected to the upper busbar on one side, a lower breaker connected to the lower busbar on one side, and a breaker connected to the other side of the lower breaker and the other side of the upper breaker: The interrupter is housed between the upper circuit breaker and the lower circuit breaker. Therefore, for example, when an accident occurs in the upper busbar or the upper circuit breaker, the upper circuit breaker can be opened to pass through the lower circuit breaker and the lower busbar and the breaker pair. The load is supplied with electricity. As a result, it is possible to reduce the time during which the accident of stopping the supply of power to the load due to the accident of the circuit breaker or the conductor on one side. However, in order to ensure safety, the permanent repair work of the upper busbar or the upper circuit breaker of the accident part must be stopped during the night when the load is stopped or during regular maintenance, and the upper busbar and the lower busbar are powered off again. In many cases, in order to ensure the safety of the operation in the casing, the maintenance work of each of the machines constituting the switch body is performed after the upper bus bar and the lower bus bar are powered off. In short, under the aforementioned conditions, it is necessary to stop supplying power to the load, and it is difficult to shorten the power-off time. In the case of a switch having such a double bus, it is expected that a permanent repair operation after an internal accident can be performed without stopping the supply of power to the load, and a switch that can perform maintenance of each machine in the casing is also expected. In view of the above-mentioned matters, it is an object of the invention to provide a switch having a double bus bar that can be implemented in a case where a checkpoint of each device in the casing or a bus bar is associated with one of the buses, and the power supply to the load is not stopped. 6 - 201145737 [Means for Solving the Problem] In order to achieve the above object, the switch of the first aspect of the present invention is a switch having a double bus bar in which a main bus bar is disposed in a vertical direction, and is provided with a region formed by a grounded metal plate. The machine room on the front side and the casing formed on the busbar chamber on the back side, and the upper and lower portions in the busbar chamber of the casing are disposed in the width direction of the casing, and the conductor is covered with a solid insulator. The surface is a ground potential upper main bus and a lower main bus, and is disposed in the machine room, and has a disconnector unit that is connected to the upper main bus through one of the contact bus bars insulated by the solid, and is disposed. In the machine room, a shutter lower shutter unit that is connected to the lower main bus bar via one of the contact bus bars insulated by the solid is disposed in the busbar chamber, and one end is connected to the upper shutter. The other side of the unit is connected to the other side of the lower shutter unit, and the other end is connected to the cable. Solid-insulated bus pulled out; the opening of the upper and the lower closing the shutter of the shutter unit interrupter unit, connected in series electrically conductive between the upper main bus and the lower main bus mentioned before. According to a second aspect of the invention, in the first aspect of the invention, the plurality of the shutters of the upper shutter unit are electrically connected in parallel to the upper main bus bar, and the plurality of lower shutter units are connected by a disc configuration. The interrupter is electrically connected in parallel to the lower main bus. According to a third aspect of the invention, in the first or second aspect of the invention, the contact bus bar and the pull-out bus bar are covered with a solid insulator so that the surface potential 201145737 is a ground potential. Further, the fourth invention is characterized by the first feature. In any one of the third inventions, the solid insulator is silicone rubber. Further, according to a fifth aspect of the invention, the first aspect of the invention, wherein the solid insulator is an epoxy resin. [Effects of the Invention] According to the present invention, a solid insulated bus bar is disposed on the upper side of the casing, and the other solid insulated bus bar is disposed on the lower side of the casing to provide a double bus bar switch. Therefore, it is possible to provide a switch that is small, light, and highly reliable, and that can be used for inspection of each machine of the casing or work related to one of the bus bars without stopping the supply of power to the load. [Embodiment] Hereinafter, an embodiment of a switch of the present invention will be described using a drawing. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a wiring diagram showing the configuration of an embodiment of a switch of the present invention. In the embodiment of the present invention, the switchboard is configured to form a switchboard for supplying power to the load, and the switchboard for wiring the busbars in the up and down direction, and each of the switchboards 1 is substantially configured to include The first bus bar 2 leading to the adjacent disk is connected to the upper portion of each of the switchboards 1, the second bus bar 3 leading to the adjacent disk is connected to the lower portion of each of the switchboards 1, and the upper busbar 4 is connected to the first bus bar 2 on one side. The lower breaker 5 connected to the second busbar 3 on one side, the third busbar 6 connected to the other side of the upper breaker 4 and the other 201145737 side of the lower breaker 5, and connected to The power cable 7 of the third bus bar 6 that supplies electric power to each load. The upper interrupter 4 and the lower interrupter 5 are electrically connected between the first bus bar 2 and the second bus bar 3, and the plurality of upper interrupters 4, 4, . The first bus bar 2 is electrically connected in parallel, and the plurality of lower breakers 5, 5, . . . are electrically connected in parallel to the second bus bar 3. In the normal operation, for example, the first bus bar 2 and the second bus bar 3 are charged by a power source from a different system, and either the upper breaker 4 or the lower breaker 5 is supplied to supply power to the load. When the power supply from the one-way system is stopped, the one busbar is powered off, but the breaker connected to the busbar on the power-off side is released, and the breaker connected to the busbar on the charging side is input, and the load can be continuously supplied. electric power. In the present embodiment, the bus bar members of the first bus bar 2, the second bus bar 3, and the third bus bar 6 are solid insulated bus bars having the same specifications as the ground potential by the outer peripheral portion of the solid insulator insulated bus bar conductor. Next, an embodiment of the switch of the present invention will be described in detail using Figs. 2 to 4 . 2 to 4 are views showing an embodiment of the switch of the present invention, FIG. 2 is a longitudinal sectional view showing an embodiment of the switch of the present invention, and FIG. 3 is a view showing the present invention shown in FIG. A schematic wiring diagram of one embodiment of the switch, and Fig. 4 is a rear view showing an embodiment of the switch of the present invention. 2 and 3, the casing 11 of the switch is partitioned into a front side and a back side by a partition plate 12 of a grounded metal plate, and is formed on the back side (the left side of FIG. 2) to form a bus bar 16 The upper busbar chamber 16A and the lower busbar chamber 16B are formed by the cover 13 and 13 in the upper side and the lower side of the busbar chamber 16. On the other hand, on the front side (the right side in Fig. 2), two machine chambers 15, 15 are formed by partitioning the sealing covers 14, 14. The purpose of the sealing cover 14 is mainly to prevent an electric shock accident from a charging portion such as a shutter from being caused by an operator or the like. Further, when the rubber pad or the like is attached to the sealing cover 14, the machine room 15 can be made dustproof. As a result, it is possible to save labor for cleaning the machine room 15. A front door 1 1 A that can be opened and closed is provided on the front side of the casing 1 1 , and a back door 1 1 B that can be opened and closed is provided on the back side. Further, between the machine rooms 15, 15 and the back side of the front door 1 1 A, the control room 17 is partitioned. At the front door 1 1 A, a protection controller 26 is mounted. At the bottoms of the machine chambers 15, 15 respectively, approximately rectangular support plates 18, 18 for fixing the three sides of the outer circumference are disposed inside the partitions 12 and the side faces of the casings 1, respectively. On the support plates 18 and 18, two shutter units 19 and 19 are placed, respectively. The shutter unit 19 is configured by a shut-off portion 21a of a vacuum interrupter (VCB) 20 that interrupts current interruption of the power supply circuit, and an operator 21 of the vacuum interrupter 20 that performs opening and closing operations of the blocking portion 21a. A current transformer (CT) 22 for the terminal on the load side of the vacuum interrupter 20 and a zero-phase current transformer (ZCT) 23 disposed at the power supply side of the vacuum interrupter 20 are provided. The two shutter units 1 9 and 19 have a front cover 41 on the respective front side (the right side in Fig. 1). In the front cover 41, a rod-shaped pull-out handle 25 is attached to the center in the vertical direction. The two shutter units 19 and 19 are mounted on the flatbed cart 24, respectively. Further, a frame 27 is erected on the upper portion of the flatbed cart 24' so as to cover the outer periphery of the front side of the vacuum interrupter 20 and the operator 21 and the three sides of the operator, and the outer circumference of -10-201145737. The converter 27 and the zero-phase converter 22 are mounted in this frame 27. The vacuum interrupter 20, the current transformer 22, and the zero-phase current transformer 23 constituting the aforementioned shutter unit 19 are connected in series as shown in Fig. 3. The zero-phase current transformer 23 is disposed on the power supply side of the vacuum interrupter 20, and the current transformer 22 is disposed on the load side of the vacuum interrupter 20. As shown in FIG. 2, the back end of the shutter unit 19 is disposed with a terminal 28 connected to the movable electrode side (lower side) of the vacuum interrupter 20 and a fixed electrode side connected to the vacuum interrupter 20 ( Terminal 29 of the upper side). The terminals 28 and 29 are connected to the contact bus bar 3 of the main bus bar 30 connected to the upper and lower busbar chambers 16A and 16B, which are connected to the lower and lower portions, which are described later, through the air-breaking insulating bushing. , auxiliary contact bus 3 2 . In Fig. 2, in the upper and lower busbar chambers 16A, 16B, the three-phase solid-insulated upper main busbar 30A and the lower main busbar 30B are transmitted through the connection adapters 34, 34 as connection members, respectively. The front faces of the casings 11 are parallel (in Fig. 2, the direction orthogonal to the paper surface). The upper and lower main bus bars 30A, 30B are connected to one end of the solid insulated contact bus bars 3 1 and 31 through the connection adapters 34, 34. The other end of the contact bus 3 1 is divided into a connection terminal 31a on one side and a connection terminal 31b on the other side. The connection terminal 31a on the other side of the communication bus bar 31 connected to the upper main bus bar 3A is guided into the machine room 15 so as to be detachable from the terminal 29 of the upper shutter unit 19. The connection terminal 3 1 b ' on one side of the communication bus 3 1 connected to the lower main bus 30B is introduced into the machine room 15 so as to be detachable from the terminal 28 of the lower shutter unit 19. -11 - 201145737 Further, on the lower side of the upper bus bar chamber 16A and on the upper side of the lower bus bar chamber 16B, the auxiliary contact bus bar 32 insulated by solid is disposed. In this auxiliary contact bus bar 3 2, a connection portion 32a to which a connection terminal 3 3 a of one end of the pull-out bus bar 3 3 is connected is formed in the intermediate portion, and a connection terminal 3 2b which can be disconnected from the terminal of the shutter unit 19 3 2c is formed at both ends. The connection terminals 3 2b and 3 2 c of the auxiliary communication bus bar 32 are introduced into the machine room 15 so that the lower terminal 28 of the shutter unit 19 of the above stage and the upper terminal 29 of the lower shutter unit 19 can be separated from each other. Further, a solid insulated pull-out bus bar 33 is disposed at the rear of the auxiliary contact bus bar 32. One end of the pull-out bus bar 33 is provided with a connection terminal 33a which is connected to the connection portion 32a of the aforementioned auxiliary contact bus bar 32. The other end of the pull-out bus bar 33 is connected to the cable head 38 to which one end of the cable 39 is connected. The other end of the cable 39 is pulled out below the casing 11, and is connected to the load. The upper main bus bar 30A, the lower main bus bar 30B, the contact bus bar 31, the auxiliary contact bus bar 3 2, and the pull-out bus bar 3 3 are each covered with a solid insulator such as silicone rubber or epoxy resin on the surface thereof. The conductive coating is applied while being at ground potential. These busbars are gas-free by such insulation, and do not require gas management, so that operability is improved, and even if dust or foreign matter is mixed into the busbar chamber 16, safety can be ensured while maintaining insulation, and the safety can be saved. In addition, in the present embodiment, the shutter units 19 and 19 of the upper and lower stages are disposed in the middle of the upper and lower main bus bars 30A and the lower main bus bar 30B in the vertical direction. Thereby, for example, even in the case where the main busbar of the upper or lower side or the shutter unit has an accident, the power supply to the load can be continued, and the repair work of the accident portion can be performed at the same time as -12-201145737. The switcher's rear view is not shown in Fig. 4. It does not constitute the switch disc, the upper main busbar 3 0 A insulated by the solid, the lower main busbar 3 0B, the contact busbar 3 1 , and the auxiliary contact busbar 3 2. The state in which the bus bar 3 3 is connected to the rear surface portion of each of the machine rooms 15 is pulled out. Here, the width of the casing 11 constituting each disk (the horizontal direction in Fig. 4) is formed to be about 600 mm, which makes it possible to reduce the size and weight. Further, the column constitutes a connection between the upper main bus bar 30A and the lower main busbar 30B, and is connected by a T-shaped connection in which the one ends of the main bus bars 30A, 30B extending from the two adjacent disks are connected in the horizontal opening. The connector 34 is used. Further, the insulation gauge of the solid insulated bus bar 30 is rated at 24 kV, which improves safety and reliability, and does not require cleaning of the bus bar. Next, the details of the above-described shutter unit 19 constituting the switch of the present invention will be described using FIG. Fig. 5 is a longitudinal side view showing an opening and closing unit constituting one embodiment of the switch of the present invention. In Fig. 5, since the same reference numerals are given to the same reference numerals as those in Figs. 1 to 4, detailed description thereof will be omitted. The vacuum interrupter 20 constituting the shutter unit 19 is mounted on a flatbed 24 having four wheels, an operator 21 disposed on the front side of the flatbed 24, and three insulations disposed at the rear thereof. The block 40 is formed by the blocking portion 21a. A front cover 41 is provided on the front side of the operator 21, and a rod-shaped pull-out handle 25 is attached to the center in the vertical direction. In the blocking portion 2 1 a of the vacuum interrupter 20, for example, three fixed electrode side terminals 2 are horizontally mounted on the upper side, and three-13-201145737 movable electrode side terminals are horizontally mounted on the lower side. 28. In the upper portion of the frame 27, the current transformers 22 and 22 respectively covering the two-phase fixed electrode side terminals 29 of the three phases are mounted, and the movable electrode side of the three phases is covered with one iron core at the lower portion. Runway-shaped zero-phase current transformer 23 of terminal 28. Further, on the side portion of the frame 27, the semi-elliptical notches 46 are provided in two places in the up and down direction. This is to avoid the purpose of providing a reduction in insulation performance due to the provision of the frame 27 on the outer circumference of the vacuum interrupter 20. Next, the operation of the machine in the casing of the above-described switch of the present invention at the time of inspection will be described with reference to Fig. 6 . Fig. 6 is a wiring diagram for explaining an operation at the time of machine inspection in an embodiment of the switch of the present invention. In Fig. 6, since the same reference numerals are given to the same reference numerals as those in Figs. 2 to 4, detailed description thereof will be omitted. The following describes the case where the upper main bus bar 30A of the interleaving disc and the shutter unit 19 of the upper disc of the specific disc are inspected. (1) As shown in Fig. 6, the vacuum interrupters 20 and 20 that pass through the lower stage are configured to perform electric power supply to the respective loads by the lower main bus bar 30B. (2) The upper vacuum interrupters 20, 20, ... are all open, and the upper main bus 3 0 A is in a power-off state. (3) The shutter units 19, 19, and 19 of the upper stage of the vacuum interrupter 20 to which the upper stage is disposed are pulled out by the housings 11, 11, and ... and are disposed at the disconnection position. (4) The cover 13 of the upper bus bar chamber 16A shown in Fig. 2 is removed, and the upper main bus bar 30A is inspected. -14- 201145737 (5) After the inspection is completed, the cover 13 of the upper busbar chamber 16A is attached, and the restoration operation is performed in the order of the above (3)' (2), (1). The solid insulated bus bar is coated with a conductive coating on the surface of the conductor by covering the periphery of the conductor with a solid insulator to make the surface a ground potential, so that no electric shock accident occurs even if the human body accidentally touches the bus bar. By using the solid insulated bus bar, the upper main bus bar 30 A, the lower main bus bar 30B, the contact bus bar 3 1 , the auxiliary contact bus bar 3 2, and the bus bar 3 3 are pulled out, and the high-voltage portion is not exposed. Therefore, when the upper main bus 3 0 A or the upper switch unit 19 is inspected as described above, it is not necessary to open the lower vacuum interrupter 20, and it is possible to continue the supply of electric power to the load. Overhaul the work. Further, in the former double bus switch, since the insulation distance must be left between the bus bars as compared with the conventional switch, it is difficult to reduce the installation space. In the present embodiment, a solid insulated bus bar is used, so that it is possible to reduce the space. According to one embodiment of the above-described switch of the present invention, one of the solid insulated bus bars is disposed on the upper side of the casing, and the other solid insulated bus bar is disposed on the lower side of the casing to have a double Since the switch of the bus bar is small, light, and reliable, it is possible to perform maintenance of each device of the casing 1 or work related to one bus, and to perform switching without stopping the supply of power to the load. Device. Further, according to the embodiment of the switch of the present invention described above, since the shutter units 19 and 19 of the upper and lower stages are disposed in the middle of the upper main bus 30A and the lower main bus 30B, for example, on the upper side. -15- 201145737 The main busbar of either side or in the event of an accident in the shutter unit, the load can be continuously supplied by the single busbar and the shutter unit, and the recovery of the accident site can be carried out at the same time. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a wiring diagram showing a configuration of an embodiment of a switch of the present invention. FIG. 2 is a longitudinal sectional view showing an embodiment of a switch of the present invention. FIG. Fig. 2 is a schematic wiring diagram of one embodiment of the switch of the present invention. Figure 4 is a rear elevational view showing the embodiment of the switch of the present invention. Fig. 5 is a side view showing an opening and closing unit constituting one embodiment of the switch of the present invention. Fig. 6 is a wiring diagram for explaining an operation at the time of machine inspection in an embodiment of the switch of the present invention. [Description of main component symbols] 1 : Switchboard 2: No. 3 Busbar 3: 2nd busbar 4: Upper interrupter 5: Lower breaker 6: 3rd busbar-16- 201145737 1 1 : Housing 1 2 : Partition 13 : Cover 1 4 : Sealing cover 15 : Machine room 16 : Busbar chamber 7 : Control room 18 : Support plate 1 9 : Closer unit 20 : Vacuum interrupter 2 1 : Operator 22 : Converter 23 : Zero-phase converter 24: Flatbed truck 30: Main busbar 30A: Upper main busbar 3 0 B: Lower main busbar 3 1 : Contact busbar 32: Auxiliary contact busbar 3 3: Pull-out busbar -17