JP4246151B2 - Vacuum circuit breaker - Google Patents

Vacuum circuit breaker Download PDF

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Publication number
JP4246151B2
JP4246151B2 JP2004525635A JP2004525635A JP4246151B2 JP 4246151 B2 JP4246151 B2 JP 4246151B2 JP 2004525635 A JP2004525635 A JP 2004525635A JP 2004525635 A JP2004525635 A JP 2004525635A JP 4246151 B2 JP4246151 B2 JP 4246151B2
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Prior art keywords
circuit breaker
movable
side terminal
terminal conductor
vacuum valve
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JPWO2004032169A1 (en
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尊士 大城
稔 小林
圭二 後藤
和昭 小山
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/66223—Details relating to the sealing of vacuum switch housings

Description

この発明は真空遮断器に関し、特に電力の開閉制御を行う開閉装置に使用されるのに適した真空遮断器に関するものである。  The present invention relates to a vacuum circuit breaker, and more particularly to a vacuum circuit breaker suitable for use in a switchgear that performs switching control of electric power.

図８および図９には従来の真空遮断器を用いたガス絶縁開閉装置の例を示し、図８は、電気設備学会誌（平成１３年１０月号）に掲載された定格電圧７２ｋＶあるいは８４ｋＶクラスのガス絶縁開閉装置を示す側断面図である。図において、１はガス絶縁開閉装置、２は絶縁媒体としてＳＦ６ガスを封入した本体容器、３は母線室で、並置された複数の装置間を通して配置されている３相母線４を収納している。５は母線４から分岐した分岐主回路の断続を行う断路器、６は上端子が断路器５に接続導体５ａにより接続された真空遮断器、７は遮断器６の下端子に接続導体７ａにより接続され、後述する接続導体８と接離して回路の断続を行う断路器、８は本体タンク２内の後部で上下方向に配設された３相の接続導体、９は接続導体８の頂部に装着されたケーブルヘッド接続部、１０は本体容器２の壁面を貫通してケーブルヘッド接続部９に接続されるケーブルヘッド、１１はケーブルヘッド１０に一端が挿入されて接続したケーブルである。なお、通常は母線４からケーブル１１までの回路を主回路という。１２はケーブル１１の外周に装着されたＣＴ、１３は接続導体８に接離して主回路の接地を行う接地開閉器、１４は避雷器である。
このように、ガス絶縁開閉装置の断路器５、真空遮断器６、断路器７およびケーブルヘッド１０等の主要機器は、いずれも接続導体５ａ、７ａおよび８により他の機器に接続されている。
図９は図８の装置に使用される真空遮断器６の側面図であり、図において、１５はベース、１６は真空バルブ、１７は真空バルブ１６の可動電極側の端部に装着された可動電極側端子、１８は真空バルブ１６の固定電極側の端部に装着された固定電極側端子、１９は可動電極側端子１７及び固定電極側端子１８を支持する絶縁支持体、２０、２１は主回路との接続のための接続用接触子、２２は真空バルブ１６の可動電極（図示せず）を駆動する接圧リンク機構、２３はベース１５に装着された操作機構、２４は接圧リンク機構２２と操作機構２３とを連結する駆動棒、２５は接圧リンク機構の外周を覆う電界緩和シールドである。
上述のような従来の真空遮断器６では、真空遮断器６の上部又は下部に駆動棒２４がこれを収納するガス絶縁開閉装置の本体容器２内に露出しているため、この部分について空間絶縁距離を確保する必要があり、これが本体容器２を大きくする原因となっていた。この結果、本体容器２を大きくする必要からガス絶縁開閉装置自体が大型化し、輸送費の増大、設置スペース増加による電気室建設コストの増大、本体容器２の大型化により絶縁媒体であるＳＦ６ガスの使用量が増大するという問題があった。
この発明は上述のような課題に対応するためになされたもので、その目的は小型化された真空遮断器を得ることである。また、この発明の目的は周囲の機器との間の空間絶縁距離を小さくできる真空遮断器を得ることである。さらに別の目的は組立ての容易な真空遮断器を得ることである。8 and 9 show an example of a conventional gas insulated switchgear using a vacuum circuit breaker. FIG. 8 shows a rated voltage 72 kV or 84 kV class published in the Journal of the Institute of Electrical Equipment (October 2001). It is side sectional drawing which shows this gas insulated switchgear. In the figure, 1 is a gas-insulated switchgear, 2 is a main body container in which SF 6 gas is sealed as an insulating medium, 3 is a busbar chamber, and houses a three-phase busbar 4 arranged between a plurality of juxtaposed devices. Yes. 5 is a disconnector for interrupting the branch main circuit branched from the bus 4, 6 is a vacuum circuit breaker whose upper terminal is connected to the disconnector 5 by the connection conductor 5 a, and 7 is a connection conductor 7 a to the lower terminal of the circuit breaker 6. A disconnector that is connected and disconnects the circuit by connecting to and disconnecting from a connection conductor 8 to be described later, 8 is a three-phase connection conductor disposed vertically in the rear part of the main body tank 2, and 9 is on the top of the connection conductor 8 The attached cable head connecting portion 10 is a cable head that passes through the wall surface of the main body container 2 and is connected to the cable head connecting portion 9, and 11 is a cable that is inserted and connected to the cable head 10. Usually, the circuit from the bus 4 to the cable 11 is called a main circuit. Reference numeral 12 denotes a CT mounted on the outer periphery of the cable 11, 13 denotes a grounding switch that contacts and separates from the connection conductor 8, and grounds the main circuit, and 14 denotes a lightning arrester.
As described above, the main devices such as the disconnect switch 5, the vacuum circuit breaker 6, the disconnect switch 7 and the cable head 10 of the gas insulated switchgear are all connected to other devices by the connection conductors 5 a, 7 a and 8.
9 is a side view of the vacuum circuit breaker 6 used in the apparatus of FIG. 8, in which 15 is a base, 16 is a vacuum valve, and 17 is a movable attached to the end of the vacuum valve 16 on the movable electrode side. Reference numeral 18 denotes an electrode side terminal, 18 denotes a fixed electrode side terminal attached to an end of the vacuum valve 16 on the fixed electrode side, 19 denotes an insulating support for supporting the movable electrode side terminal 17 and the fixed electrode side terminal 18, and 20 and 21 denote main terminals. A contact for connection with a circuit, 22 is a contact pressure link mechanism for driving a movable electrode (not shown) of the vacuum valve 16, 23 is an operating mechanism mounted on the base 15, and 24 is a pressure contact link mechanism. Reference numeral 25 denotes a drive rod for connecting 22 and the operation mechanism 23, and 25 is an electric field relaxation shield that covers the outer periphery of the contact pressure link mechanism.
In the conventional vacuum circuit breaker 6 as described above, the drive rod 24 is exposed in the main body container 2 of the gas-insulated switchgear that accommodates the drive rod 24 at the upper or lower portion of the vacuum circuit breaker 6. It was necessary to secure a distance, which caused the main body container 2 to be enlarged. As a result, the gas insulated switchgear itself is increased in size due to the necessity of enlarging the main body container 2, increasing the transportation cost, increasing the construction cost of the electric room due to the increase in installation space, and increasing the size of the main body container 2, and SF 6 gas as an insulating medium. There was a problem that the amount of use increased.
The present invention has been made to cope with the above-described problems, and an object thereof is to obtain a miniaturized vacuum circuit breaker. Another object of the present invention is to obtain a vacuum circuit breaker that can reduce the space insulation distance between the surrounding devices. Yet another object is to obtain a vacuum circuit breaker that is easy to assemble.

（１）本発明の真空遮断器は、ガス絶縁開閉装置の容器壁の一部として前記容器壁に気密に取り付けられるベースと、前記ベースに設けられた一対の絶縁支持体と、固定電極側端子および可動電極側端子を有し、前記絶縁支持体によって前記両端子部を支持されて前記ベースに取り付けられた真空バルブと、前記ベースに設けられた操作機構と、前記操作機構と前記真空バルブの前記可動電極側端子との間に連結されて前記真空バルブを開閉させる操作リンク機構とを備えた真空遮断器に於いて、前記操作リンク機構が前記絶縁支持体を貫通して延びていて、前記絶縁支持体によって覆われていることを特徴とする真空遮断器である。
（２）前記真空バルブの前記固定電極側端子および可動電極側端子が、ガス絶縁開閉装置の主回路導体に接続できる接続子を備えたものであってもよい。
（３）前記固定電極側端子および可動電極側端子がそれぞれ電界緩和ケースを備えていてもよい。
（４）本発明の真空遮断器はまた、ベースと、前記ベースの一側に配置された真空バルブと、真空バルブの固定電極側端部に接続された固定側端子導体と、真空バルブの可動電極側に接続された接点開閉リンク機構と、真空バルブの可動電極側に接続された可動側端子導体と、前記ベース上に起立して前記固定側端子導体と前記可動側端子導体をそれぞれ支持する一対の絶縁支持体と、前記ベースを挟んで前記真空バルブと反対側に装着された操作機構と、前記絶縁支持体の内部に支持方向に沿って配置され前記操作機構と前記接点開閉リンク機構とを連結し駆動する駆動部材とを備えた真空遮断器である。
（５）固定側端子導体は、真空バルブの固定電極側端部に当接し真空バルブを支持する支持部と、この支持部を支持するとともに開放容器状に包囲する包囲部と、他の主回路と接離する端子部とを備えたものでもよい。
（６）可動側端子導体は、真空バルブの可動電極側に接続された接点開閉リンク機構を開放容器状に包囲し、他の主回路と接離する端子部を備えたものでもよい。
（７）固定側端子導体及び可動側端子導体の外周面は、異なる平面間を曲面で接続したものでもよい。
（８）真空バルブの筒状部の両端外径部を固定側端子導体及び可動側端子導体で覆ったものでもよい。
（９）ベースは、ガス絶縁開閉装置の容器壁の一部を構成するものでもよい。
（１０）接点開閉リンク機構は、可動側端子導体で支持した接圧リンク機構であってもよい。
（１１）可動側端子導体を支持する絶縁支持体は、中空筒状としこの内部に操作機構と接点開閉リンク機構とを連結し駆動する駆動部材を配置したものでもよい。
（１２）ベースの操作機構取付け側に、可動側端子導体を支持する絶縁支持体の中空穴に連通した気密室を設け、この中に操作機構と接点開閉リンク機構とを連結する駆動部材を連結して駆動するとともに操作棒の一端が前記気密室の壁を貫通して操作機構に連結されたレバー軸を配置したものでもよい。(1) A vacuum circuit breaker according to the present invention includes a base that is hermetically attached to the container wall as a part of a container wall of a gas insulated switchgear, a pair of insulating supports provided on the base, and a fixed electrode side terminal And a movable electrode side terminal, the vacuum valve attached to the base with both terminal portions supported by the insulating support, the operating mechanism provided on the base, the operating mechanism and the vacuum valve In a vacuum circuit breaker comprising an operation link mechanism connected between the movable electrode side terminal and opening and closing the vacuum valve, the operation link mechanism extends through the insulating support, The vacuum circuit breaker is covered with an insulating support.
(2) The fixed electrode side terminal and the movable electrode side terminal of the vacuum valve may include a connector that can be connected to the main circuit conductor of the gas insulated switchgear.
(3) The fixed electrode side terminal and the movable electrode side terminal may each include an electric field relaxation case.
(4) The vacuum circuit breaker of the present invention also includes a base, a vacuum valve disposed on one side of the base, a fixed terminal conductor connected to a fixed electrode side end of the vacuum valve, and a movable vacuum valve. A contact opening / closing link mechanism connected to the electrode side, a movable side terminal conductor connected to the movable electrode side of the vacuum valve, and standing on the base to support the fixed side terminal conductor and the movable side terminal conductor, respectively. A pair of insulating supports, an operating mechanism mounted on the opposite side of the vacuum valve across the base, and the operating mechanism and the contact opening / closing link mechanism disposed along the supporting direction inside the insulating support; A vacuum circuit breaker including a driving member that connects and drives the two.
(5) The fixed-side terminal conductor is in contact with the fixed electrode side end of the vacuum valve and supports the vacuum valve; an enclosure that supports the support and surrounds in an open container; and other main circuits It may be provided with a terminal portion that contacts and separates.
(6) The movable-side terminal conductor may be provided with a terminal portion that surrounds the contact opening / closing link mechanism connected to the movable electrode side of the vacuum valve in an open container shape and contacts and separates from other main circuits.
(7) The outer peripheral surfaces of the fixed terminal conductor and the movable terminal conductor may be formed by connecting different planes with curved surfaces.
(8) The outer diameter portions at both ends of the cylindrical portion of the vacuum valve may be covered with the fixed side terminal conductor and the movable side terminal conductor.
(9) The base may constitute a part of the container wall of the gas insulated switchgear.
(10) The contact opening / closing link mechanism may be a contact pressure link mechanism supported by a movable terminal conductor.
(11) The insulating support that supports the movable terminal conductor may have a hollow cylindrical shape, in which a driving member that connects and drives the operating mechanism and the contact opening / closing link mechanism may be disposed.
(12) An airtight chamber communicating with the hollow hole of the insulating support that supports the movable side terminal conductor is provided on the operation mechanism mounting side of the base, and a driving member for connecting the operation mechanism and the contact opening / closing link mechanism is connected to this chamber. The lever shaft may be arranged such that one end of the operation rod penetrates the wall of the hermetic chamber and is connected to the operation mechanism.

図１はこの発明の真空遮断器を収納したガス絶縁開閉装置の側断面図である。
図２は図１のガス絶縁開閉装置から真空遮断器を引出した状態を示す側断面図である。
図３は図１の真空遮断器を示す側断面図である。
図４は図３の真空遮断器の背面図である。
図５は図３の真空遮断器の平面図である。
図６は図３の遮断器の可動電極側端子の斜視図である。
図７は図３の遮断器のレバー軸を図３の矢印Ａ−Ａ方向からみた図である。
図８は従来のガス絶縁開閉装置を示す断面図である。
図９は図８に示すガス絶縁開閉装置の真空遮断器の側面図である。FIG. 1 is a side sectional view of a gas insulated switchgear housing a vacuum circuit breaker according to the present invention.
2 is a side sectional view showing a state in which the vacuum circuit breaker is pulled out from the gas insulated switchgear of FIG.
FIG. 3 is a side sectional view showing the vacuum circuit breaker of FIG.
4 is a rear view of the vacuum circuit breaker of FIG.
FIG. 5 is a plan view of the vacuum circuit breaker of FIG.
6 is a perspective view of the movable electrode side terminal of the circuit breaker of FIG.
7 is a view of the lever shaft of the circuit breaker of FIG. 3 as viewed from the direction of arrow AA in FIG.
FIG. 8 is a sectional view showing a conventional gas insulated switchgear.
FIG. 9 is a side view of the vacuum circuit breaker of the gas insulated switchgear shown in FIG.

図１乃至図７にこの発明の真空遮断器を使用したガス絶縁開閉装置を示す。図において、５０は内部に絶縁媒体としてＳＦ６ガスを封入した本体容器、５１ａは前記本体容器５０の上部に載置した第１母線室、５１ｂは第１母線室５１ａに隣接して配置された第２母線室、５２ａ、５２ｂは並置された複数のガス絶縁開閉装置を連通して接続配置された母線である。母線室５１ａ内に於いて、母線５２ａからの分岐線５２ｂには断路器５３がボルト等により接続されている。断路器５３は、可動接触部５３ａを図１において左右に動作させ、固定接触部５３ｂとの間で接離させることで分岐主回路の断続をするものである。固定接触部５３ｂは、本体容器５０と母線室５１ａとの間の隔壁を貫通して支持されたブッシング５４内に延びた貫通導体５４ａの先端にボルト等により装着されている。
本体容器５０内には、母線室５１ａと本体容器５０との間の隔壁に支持されたブッシング５４の貫通導体５４ａの下端に支持された第１の接地開閉器５５が設けられている。接地開閉器５５は本体容器５０に設けられた固定接触子５５ｂと、固定接触子５５ｂに対して離接する可動接触子５５ａと、可動接触子５５ａを駆動するリンク機構５５ｄと、リンク機構５５ｄを覆うほぼ中空の電界緩和用の導電性ケース５５ｃとを備えている。接地開閉器５５の導電性ケース５５ｃは、貫通導体５４ａに機械的にも電気的にも直接接続されている。このような直接接続は、例えば導電性ケース５５ｃを内側から貫通して延びるボルト（図示してない）を貫通導体５４ａの下端に設けたボルト孔にねじ係合させ、貫通導体５４ａの下端とボルトヘッドとの間に導電性ケース５５ｃを保持することによって達成できる。可動接触子５５ａは、図１において左右方向（ガス絶縁開閉装置の前後方向）に動作し固定接触子５５ｂに対して接離して主回路を接地する。接地開閉器５５の導電性ケース５５ｃの下部には側面から見てＬ字状に形成された接続導体５６がボルト等により固着されていて、その下端には、後に図３乃至５に関連して詳しく説明する真空遮断器５８の端子部７１ａに設けた接続端子８２（図３参照）に接続される接続部５７が、本体容器の前面側に向けて設けられている。
接続部５７を介して接地開閉器５５に接続されている真空遮断器５８の詳細は図３乃至５に関連して説明するが、真空遮断器５８は、本体容器５０の前面の開口５０ａを覆うように取り付けられたベース７４と、ベース７４の外面に設けられた操作機構７７と、ベース７４の内面に取り付けられた絶縁支持体７５および７６と、絶縁支持体７５および７６によって固定電極側の端子部７０ａおよび可動電極側の端子部７０ｂで支持され、固定電極および可動電極を有する真空バルブ７０とを備えている。真空バルブ７０の各端子部７０ａおよび７０ｂをそれぞれ支持する固定電極側端子７１および可動電極側端子７２は、外周が電界緩和を図るために曲面形状とされた電界緩和ケースを備えている。固定電極側端子７１および可動電極側端子７２はそれぞれ絶縁支持体７５および７６にボルト等の適当な固着手段によって取り付けられている。
真空遮断器５８の下側の可動電極側の端子部７０ｂは、絶縁支持体７６にボルト等によって取り付けられた可動電極側端子７２に設けられた接続子を介して接地開閉器５９の接続子５９ｄに接続されている。接地開閉器５９は、操作軸５９ｃの回動により図１において本体容器５０の前後方向（図で左右）に動作する可動接触子５９ａを備え、この可動接触子５９ａが固定接触子５９ｂと接離して主回路を接地する。本体容器５０の前面側に向けて接地開閉器５９の可動接触子側は、電界緩和用の導電ケース５９ｅによって覆われていて、接続子５９ｄはこの導電ケース５９ｅの前面に装着され、真空遮断器５８の端子と結合する。
本体容器５０の後壁には断路器６０が設けられている。断路器６０は、可動接触部６０ａと、固定接触部６０ｂと、可動接触部６０ａおよび固定接触部６０ｂ間で操作軸６０ｆの回動により図１において上下に動作して可動接触部６０ａと接離して主回路を断続する可動接触子６０ｃと、基台６０ｅ上に装着されて可動接触部６０ａおよび固定接触部６０ｂをそれぞれ支持する絶縁支持体６０ｄとを備えている。可動接触部６０ａと固定接触部６０ｂは絶縁支持体６０ｄに取り付けられた電界緩和用の導電ケース６０ｇおよび導電ケース６０ｈによって覆われている。断路器６０は、基台６０ｅを本体容器５０の後壁に固定することで、本体容器５０内に装着される。また断路器６０の導電ケース６０ｈと接地開閉器５９の導電ケース５９ｅとの間は、ボルト（図示してない）によって結合されて電気的に接続されている。
本体容器５０の後壁には、断路器６０の上方に配置されて、主回路を本体容器５０を介して接地させる接地開閉器６１が設けられている。操作軸６１ｃの回動により図１において本体容器５０の後方に向けて左右に動作する可動接触子６１ａが固定接触子６１ｂと接離して主回路を接地する。この接地開閉器６１操作部分の外周も断路器６０と同様に電界緩和用の導電ケース６１ｄにより覆われていて、この導電ケース６１ｄは断路器６０の導電ケース６０ｇに直接当接し、ボルト等により結合されている。
断路器６１の上方には更にケーブルヘッド接続部材６２が設けられている。ケーブルヘッド接続部材６２は、本体容器５０の後壁を貫通して挿入されるケーブルヘッド６３の先端接続部と連結された接触子６２ａと、操作軸６２ｃと、操作軸６２ｃの回動により本体容器５０に取り付けられた避雷器６５の下端に接離する接触棒６２ｂと、ケーブルヘッド接続部材６２の外周を覆う電界緩和用の導電ケース６２ｄとを備えている。ケーブルヘッド６３からはケーブル６４が延びている。
なお、接地開閉器５９、断路器６０、接地開閉器６１、ケーブルヘッド接続部材６２の外周を覆う導電性ケース５９ｅ、６０ｇ、６０ｈ、６１ｄおよび６２ｄは、図示のように各器具の外周をそれぞれ独立して覆うものでもよいが、各機器の外周部が電界緩和用の形状処理がされたフレームであってもよい。
なお、図１で示すように断路器６０の固定接触部６０ｂの下部には接地開閉器５９がそれぞれの導電ケースを接合する形でボルト等を使用して強固に接合される。また、断路器６０の可動接触部６０ａの上部には接地開閉器６１がそれぞれの導電ケースを接合する形でボルト等を使用して強固に接合される。さらに接地開閉器６１の上部にケーブルヘッド接続部材６２をそれぞれの導電ケースを接合する形でボルト等を使用して強固に接合される。
このように接地開閉器５９、断路器６０、接地開閉器６１、ケーブルヘッド接続部材６２の導電ケースを互いに直に強固に連結することで、接続導体を別途準備することなく主回路の一部を構成することができ、各機器をコンパクトに構成することができる。さらに基台６０ｅを断路器６０の下部に配置することで、１個の基台のみで接地開閉器５９、断路器６０、接地開閉器６１を１個に組み合せて開閉器ユニット６６を形成することが出来る。また、開閉器ユニット６６に更に図１、図２に示すようにケーブルヘッド接続部材６２をさらに追加したものを開閉器ユニット６６として扱ってもよい。開閉器ユニット６６は、本体容器５０と基台６０ｅとの結合を外せば一つの組立体として本体容器５０から容易に取り外すことができる。
図２は、図１の状態から真空遮断器５８を取り外した状態を示す。図において５０ａは本体容器前面の遮断器取付け用開口である。遮断器５８の挿入方向に向って第１の接続子５７と第２の接続子５９ｄが配置されており、遮断器５８を本体容器５０内に挿入する場合も容易に装着できる。
また、遮断器５８を取り外した位置の下部には何も配置されておらず人が容易に入ることが出来る為、点検作業が容易になる。
また、開閉器ユニット６６の断路器の可動接触子６０ｃの動作方向を上下にするとともに、下部接地開閉器５９及び上部接地開閉器６１の可動接触子５９ａ、６１ａの動作方向を本体容器５０の後方に向けて動作させるようにしたため、開閉器ユニット６６の高さを低く構成することができる（その結果本体容器５０を小さくできる）とともに、開閉器ユニットの取外し・挿入作業が容易になる。
図３乃至図７は、真空遮断器５８の詳細を示すもので、図において、７０は内部に可動・固定電極を有する真空バルブ、７１は前記真空バルブ７０の固定電極側端子で、外周は電界緩和を図るため曲面形状とし、内部に固定電極側端子７１の左右壁間を橋状に跨り真空バルブ７０の固定側端部の固定電極棒７０ａに当接して支持する支持部を備えている。７２は真空バルブ７０の可動電極側端子で、外周は電界緩和を図る為曲面形状とし、内部に可動電極側端子７２の左右壁間を橋状に跨る可撓導体接続部を備え、真空バルブ７０の可動電極部とこの可撓導体接続部７２ａとを可撓導体７３で接続している。
７４は本体容器５０の側壁の一部を兼ねる板状のベース、７５はベースの一面に立設されて固定電極側端子７１を支持する絶縁支持体、７６は内部に貫通孔７６ａを有し絶縁支持体７５と同様に前記ベース７４の一面に立設されて可動電極側端子７２を支持する絶縁支持体、７７はベース７４を挟んで真空バルブ７０とは反対側に装着された遮断器の操作機構、７８はベース７４の操作機構７７取付け側の面に箱状体を押し当てて気密に形成した操作レバー室でベースに形成された孔７４ａを介して貫通孔７６ａと連通している。
７９は操作機構７７の駆動力を各相対応のレバー７９ａにて真空バルブ７０の可動電極に分配するレバー軸で、操作レバー室７８のベース７４上に装着された軸受けにて回動可能に支持されるとともに、一端はレバー室７８の上部壁を貫通して外部に導出され操作棒７７ａを介して操作機構７７に接続されている。８０は、真空バルブ７０の可動電極棒７０ｂに接続され可動電極端子７２に支持された軸８０ａを支点として回動する接圧リンク機構で、軸８０ａを回動軸として回動するレバー８０ｂと、このレバー８０ｂに一端が揺動自在に装着され、他端が可動電極棒７０ｂに接続された接圧ばね８０ｃとを備えている。
８１は、レバー７９ａと接圧リンク機構８０のレバー８０ｂの他端とを連結し、駆動する駆動ロッド、８２は側面から見てほぼＬ字型に形成された固定電極側端子７１の上方への立ち上がり部に遮断器７７の挿入方向に突出して設けられた接続端子で、第１の接触子５７と離接する。８３は、可動電極側端子７２の下部から遮断器７７の挿入方向に突出して設けられた接続端子で、第２の接触子５９ｄに接続されている。８４は真空バルブ７０の中間部の外周を筒状に覆うシールドである。
また、図６に示す如く、可動電極側端子７２は、ほぼ外表面全体が曲面とされた中空で導電性の電界緩和ケースを備えており、接圧リンク機構８０の上下・左右を包み込み、更に両側壁が可撓導体７３あるいは接圧リンク機構８０よりも遮断器５８の挿入方向に延長されているため、この部分の電界緩和効果が大きくなり、この可動電極側端子７２の周囲近傍の他の部材との間の空間絶縁距離を小さくすることができる。可動電極側端子７２は絶縁支持体７６にボルトで取り付けるためのフランジ部７２ｂを持ち、フランジ部７２ｂを通して駆動ロッド８１が貫通するようにしてある。可動電極側端子７２はまた、頂部には真空バルブ７０の下端を受け入れる円形の開口７２ｃを持ち、下部には他の接続導体（図１の接続子５９ｄ等）に結合されて電気的に接続される接続子８３を導出させるための開口７２ｄ（図４）を有している。また、電界緩和ケース７２ａの側面には、内部に収納したリンク機構の枢軸等のための組立調整用の開口７２ｄも設けられている。
固定電極側端子７１も図６に示す電界緩和ケースを備えたよく似た構造であって、絶縁支持体７５にボルトで固着され、真空バルブ７０の上端を覆って支持すると共に接続子８２を介して接続導体（図１の接続子５７等）に接続できるようにする開口７１ｃを持ち、固定電極側端子７１の周囲の電界を緩和させるような曲面構造とされている。
図７は図３に示す真空遮断器５８のレバー軸７９を図３に於いて左側から見た概略図である。レバー軸７９はベース７４に取り付けられた気密のレバー室７８内に設けられた軸受け７９ｄにより回転自在に支持されている。このレバー軸７９にはレバー７９ｂが固着されていて、リンク７９ｆを介して操作機構７７から延びた作動ロッド７７ａが連結されている。作動ロッド７７ａシール７９ｅにより気密を維持したままレバー室７８を貫通しており、操作機構７７によりレバー軸７９が回転されるようにしてある。レバー室７８内のレバー軸７９にはそれぞれ先端が駆動ロッド８１に連結されたアーム７９ａが固着されていて、レバー軸７９の回転により駆動ロッド８１が操作されるようにしてある。
このように、本発明の真空遮断器５８は、例えばガス絶縁開閉装置の本体容器５０の一部として本体容器５０に気密に取り付けられるベース７４と、ベース７４の外側面に設けられた一対の絶縁支持体７５および７６とを備えている。ベース７４にはまた、この絶縁支持体７５、７６によって固定電極側端子７１および可動電極側端子７２で支持された真空バルブ７０が取り付けられている。ベースの内側面には操作機構７７が設けられていて、操作機構７７と真空バルブ７０の可動電極側端子７２との間には、真空バルブ７０を開閉させる駆動ロッド８１および接圧リンク機構８０が設けられている。また、駆動ロッド８１は、可動電極側端子７２を支持する絶縁支持体７６を貫通して延びていて、絶縁支持体７６によって覆われている。
また、真空バルブ７０の固定電極側端子７１および可動電極側端子７２が、それぞれガス絶縁開閉装置の主回路導体に接続できる接続子８２および８３を備えている。また、固定電極側端子７１および可動電極側端子７２はそれぞれ電界緩和ケースを備えている。
このような構成とすることで、以下のような効果が得られる。絶縁支持体７６の貫通孔７６ａに駆動部材８１を通すことで、図８の従来例のように上部の絶縁支持体１９よりも上方に駆動棒２４を配置する必要がなくなるため、遮断器の高さを図８の構成に比べて大幅に低く構成することが可能となる。また、固定電極側端子７１および可動電極側端子７２の周囲の電界緩和効果を大きくすることで、各相間あるいは対地間（各相と本体容器５０との間）の空間絶縁距離を小さくすることができるため、装置をコンパクトに構成することができる。
更に、図１あるいは図３に示すように、真空バルブ７０の両端部をそれぞれ固定電極側端子７１および可動電極側端子７２の中に挿入し、真空バルブ７０の端部外周を固定電極側端子７１および可動電極側端子７２により覆うように構成してある。このように構成することで、セラミック筒と金属製端板との接合部があるために電界集中を生じやすい真空バルブ７０の端部の電界集中を大幅に緩和させた真空遮断器を得ることができる。
以上説明した通り、本発明の真空遮断器は、ガス絶縁開閉装置の容器壁の一部として前記容器壁に気密に取り付けられるベースと、前記ベースに設けられた一対の絶縁支持体と、固定電極側端子および可動電極側端子を有し、前記絶縁支持体によって前記両端子部を支持されて前記ベースに取り付けられた真空バルブと、前記ベースに設けられた操作機構と、前記操作機構と前記真空バルブの前記可動電極側端子との間に連結されて前記真空バルブを開閉させる操作リンク機構とを備えた真空遮断器に於いて、前記操作リンク機構が前記絶縁支持体を貫通して延びていて、前記絶縁支持体によって覆われていることを特徴とする真空遮断器である。従って、真空遮断器を小型化することができ、周囲の機器との間の空間絶縁距離を小さくできる。1 to 7 show a gas insulated switchgear using the vacuum circuit breaker of the present invention. In the figure, 50 is a main body container in which SF 6 gas is sealed as an insulating medium, 51a is a first bus bar chamber placed on top of the main body container 50, and 51b is disposed adjacent to the first bus bar room 51a. The second bus bar chambers 52a and 52b are bus bars that are connected to each other by connecting a plurality of gas-insulated switchgears arranged in parallel. In the bus bar chamber 51a, a disconnector 53 is connected to a branch line 52b from the bus bar 52a by a bolt or the like. The disconnector 53 is configured to intermittently connect the branch main circuit by moving the movable contact portion 53a left and right in FIG. 1 and making contact with and separating from the fixed contact portion 53b. The fixed contact portion 53b is attached to the tip of a through conductor 54a extending into the bushing 54 supported through the partition wall between the main body container 50 and the bus bar chamber 51a with a bolt or the like.
In the main body container 50, a first grounding switch 55 supported at the lower end of the through conductor 54a of the bushing 54 supported by the partition wall between the bus bar chamber 51a and the main body container 50 is provided. The grounding switch 55 covers the fixed contact 55b provided in the main body container 50, the movable contact 55a that is separated from and in contact with the fixed contact 55b, the link mechanism 55d that drives the movable contact 55a, and the link mechanism 55d. A substantially hollow conductive case 55c for electric field relaxation is provided. The conductive case 55c of the ground switch 55 is directly connected mechanically and electrically to the through conductor 54a. For such direct connection, for example, a bolt (not shown) extending through the conductive case 55c from the inside is screw-engaged with a bolt hole provided at the lower end of the through conductor 54a, and the lower end of the through conductor 54a is connected to the bolt. This can be achieved by holding the conductive case 55c between the head and the head. The movable contact 55a operates in the left-right direction (the front-rear direction of the gas-insulated switchgear) in FIG. 1, contacts and separates from the fixed contact 55b, and grounds the main circuit. A connection conductor 56 formed in an L shape when viewed from the side is fixed to the lower part of the conductive case 55c of the ground switch 55 with a bolt or the like, and a lower end thereof is related to FIGS. 3 to 5 later. A connection portion 57 connected to a connection terminal 82 (see FIG. 3) provided on the terminal portion 71a of the vacuum circuit breaker 58 to be described in detail is provided toward the front surface side of the main body container.
The details of the vacuum circuit breaker 58 connected to the ground switch 55 via the connecting portion 57 will be described with reference to FIGS. 3 to 5, but the vacuum circuit breaker 58 covers the opening 50 a on the front surface of the main body container 50. The base 74 attached in this manner, the operating mechanism 77 provided on the outer surface of the base 74, the insulating supports 75 and 76 attached to the inner surface of the base 74, and the terminals on the fixed electrode side by the insulating supports 75 and 76 The vacuum valve 70 is supported by the portion 70a and the terminal portion 70b on the movable electrode side, and has a fixed electrode and a movable electrode. The fixed electrode side terminal 71 and the movable electrode side terminal 72 that respectively support the terminal portions 70a and 70b of the vacuum valve 70 are provided with an electric field relaxation case whose outer periphery has a curved shape in order to reduce the electric field. The fixed electrode side terminal 71 and the movable electrode side terminal 72 are respectively attached to the insulating supports 75 and 76 by appropriate fixing means such as bolts.
The terminal part 70b on the movable electrode side below the vacuum circuit breaker 58 is connected to a connector 59d of the ground switch 59 via a connector provided on the movable electrode side terminal 72 attached to the insulating support 76 with a bolt or the like. It is connected to the. The earthing switch 59 includes a movable contact 59a that moves in the front-rear direction (left and right in the drawing) of the main body container 50 in FIG. 1 by the rotation of the operation shaft 59c, and the movable contact 59a contacts and separates from the fixed contact 59b. Ground the main circuit. The movable contactor side of the grounding switch 59 is covered with a conductive case 59e for electric field relaxation toward the front side of the main body container 50, and the connector 59d is mounted on the front side of the conductive case 59e. Combined with 58 terminals.
A disconnector 60 is provided on the rear wall of the main body container 50. The disconnector 60 moves up and down in FIG. 1 by moving the operation shaft 60f between the movable contact portion 60a, the fixed contact portion 60b, and the movable contact portion 60a and the fixed contact portion 60b, and is brought into and out of contact with the movable contact portion 60a. A movable contact 60c for intermittently connecting the main circuit, and an insulating support 60d mounted on the base 60e and supporting the movable contact 60a and the fixed contact 60b. The movable contact portion 60a and the fixed contact portion 60b are covered with a conductive case 60g for electric field relaxation and a conductive case 60h attached to the insulating support 60d. The disconnector 60 is mounted in the main body container 50 by fixing the base 60 e to the rear wall of the main body container 50. Further, the conductive case 60h of the disconnector 60 and the conductive case 59e of the ground switch 59 are coupled and electrically connected by a bolt (not shown).
A ground switch 61 is provided on the rear wall of the main body container 50 and is disposed above the disconnector 60 and grounds the main circuit via the main body container 50. As the operation shaft 61c rotates, the movable contact 61a that moves to the left and right toward the rear of the main body container 50 in FIG. 1 contacts and separates from the fixed contact 61b to ground the main circuit. The outer periphery of the operation portion of the earthing switch 61 is covered with a conductive case 61d for electric field mitigation similar to the disconnector 60, and the conductive case 61d directly contacts the conductive case 60g of the disconnector 60 and is coupled by a bolt or the like. Has been.
A cable head connecting member 62 is further provided above the disconnector 61. The cable head connecting member 62 is connected to the tip connecting portion of the cable head 63 inserted through the rear wall of the main body container 50, the operation shaft 62c, and the rotation of the operation shaft 62c. 50 is provided with a contact rod 62b that contacts and separates from the lower end of the lightning arrester 65 attached to 50, and a conductive case 62d for electric field relaxation that covers the outer periphery of the cable head connecting member 62. A cable 64 extends from the cable head 63.
The conductive cases 59e, 60g, 60h, 61d and 62d covering the outer peripheries of the ground switch 59, the disconnect switch 60, the ground switch 61 and the cable head connecting member 62 are independent of the outer peripheries of the respective devices as shown in the figure. However, the outer peripheral portion of each device may be a frame that has been subjected to shape processing for electric field relaxation.
In addition, as shown in FIG. 1, the earthing switch 59 is firmly joined to the lower part of the fixed contact part 60b of the disconnect switch 60 using a bolt etc. in the form which joins each conductive case. In addition, a ground switch 61 is firmly joined to the upper part of the movable contact portion 60a of the disconnector 60 using bolts or the like so as to join the conductive cases. Further, the cable head connecting member 62 is firmly joined to the upper portion of the ground switch 61 using bolts or the like in the form of joining the respective conductive cases.
In this way, the grounding switch 59, the disconnect switch 60, the grounding switch 61, and the conductive case of the cable head connecting member 62 are directly and firmly connected to each other, so that a part of the main circuit can be formed without separately preparing a connecting conductor. Each device can be configured compactly. Further, by arranging the base 60e below the disconnect switch 60, the switch unit 66 can be formed by combining the ground switch 59, the disconnect switch 60, and the ground switch 61 into a single base with only one base. I can do it. Further, a switch unit 66 to which a cable head connecting member 62 is further added as shown in FIGS. 1 and 2 may be handled as the switch unit 66. The switch unit 66 can be easily detached from the main body container 50 as one assembly by removing the connection between the main body container 50 and the base 60e.
FIG. 2 shows a state in which the vacuum circuit breaker 58 is removed from the state of FIG. In the figure, reference numeral 50a denotes a breaker mounting opening on the front surface of the main body container. The first connector 57 and the second connector 59d are arranged in the insertion direction of the circuit breaker 58, and can be easily mounted when the circuit breaker 58 is inserted into the main body container 50.
In addition, nothing is arranged below the position where the circuit breaker 58 is removed, and a person can easily enter, so the inspection work is facilitated.
Further, the operation direction of the movable contact 60 c of the disconnector of the switch unit 66 is raised and lowered, and the operation direction of the movable contacts 59 a and 61 a of the lower ground switch 59 and the upper ground switch 61 is set to the rear of the main body container 50. Therefore, the height of the switch unit 66 can be reduced (as a result, the main body container 50 can be reduced), and the removal / insertion work of the switch unit is facilitated.
3 to 7 show details of the vacuum circuit breaker 58. In the figure, 70 is a vacuum valve having a movable / fixed electrode inside, 71 is a fixed electrode side terminal of the vacuum valve 70, and the outer periphery is an electric field. A curved surface is formed for relaxation, and a support portion is provided inside the bridge between the left and right walls of the fixed electrode side terminal 71 so as to contact and support the fixed electrode rod 70a at the fixed side end of the vacuum valve 70. Reference numeral 72 denotes a movable electrode side terminal of the vacuum valve 70, and the outer periphery has a curved surface shape for electric field relaxation, and includes a flexible conductor connecting portion straddling between the left and right walls of the movable electrode side terminal 72 in a bridge shape. The flexible electrode 73 and the flexible conductor connecting portion 72 a are connected by a flexible conductor 73.
74 is a plate-like base that also serves as a part of the side wall of the main body container 50, 75 is an insulating support that stands on one surface of the base and supports the fixed electrode side terminal 71, and 76 has a through hole 76 a inside and is insulated. As with the support body 75, an insulating support body is provided on one surface of the base 74 to support the movable electrode side terminal 72, and 77 is an operation of a circuit breaker mounted on the opposite side of the vacuum valve 70 across the base 74. The mechanism 78 communicates with the through hole 76a through a hole 74a formed in the base in an operation lever chamber formed in an airtight manner by pressing a box-like body against the surface of the base 74 on the side where the operation mechanism 77 is attached.
Reference numeral 79 denotes a lever shaft that distributes the driving force of the operation mechanism 77 to the movable electrode of the vacuum valve 70 by the lever 79a corresponding to each phase. The lever shaft 79 is rotatably supported by a bearing mounted on the base 74 of the operation lever chamber 78. At the same time, one end penetrates the upper wall of the lever chamber 78 and is led out to the outside, and is connected to the operation mechanism 77 via the operation rod 77a. Reference numeral 80 denotes a contact pressure link mechanism that rotates about a shaft 80a that is connected to the movable electrode rod 70b of the vacuum valve 70 and supported by the movable electrode terminal 72, and a lever 80b that rotates about the shaft 80a. The lever 80b includes a contact pressure spring 80c having one end swingably mounted and the other end connected to the movable electrode rod 70b.
Reference numeral 81 denotes a drive rod that connects the lever 79a and the other end of the lever 80b of the contact pressure link mechanism 80 to drive the drive rod, and 82 denotes an upper side of the fixed electrode side terminal 71 formed in an L shape when viewed from the side. A connection terminal provided at the rising portion so as to protrude in the insertion direction of the circuit breaker 77 is separated from and connected to the first contactor 57. Reference numeral 83 denotes a connection terminal provided so as to protrude from the lower part of the movable electrode side terminal 72 in the insertion direction of the circuit breaker 77 and is connected to the second contactor 59d. A shield 84 covers the outer periphery of the intermediate portion of the vacuum valve 70 in a cylindrical shape.
Further, as shown in FIG. 6, the movable electrode side terminal 72 includes a hollow and conductive electric field relaxation case whose entire outer surface is a curved surface, wraps up and down, left and right of the contact pressure link mechanism 80, and Since both side walls are extended in the insertion direction of the circuit breaker 58 more than the flexible conductor 73 or the contact pressure link mechanism 80, the electric field relaxation effect of this portion is increased, and other portions in the vicinity of the periphery of the movable electrode side terminal 72 are provided. The space insulation distance between the members can be reduced. The movable electrode side terminal 72 has a flange portion 72b for attaching to the insulating support 76 with a bolt, and the drive rod 81 penetrates through the flange portion 72b. The movable electrode side terminal 72 also has a circular opening 72c for receiving the lower end of the vacuum valve 70 at the top, and is coupled to and electrically connected to another connection conductor (such as the connector 59d in FIG. 1) at the bottom. 72d (FIG. 4) for leading out the connector 83. In addition, an opening 72d for assembly adjustment for a pivot of a link mechanism housed inside is provided on the side surface of the electric field relaxation case 72a.
The fixed electrode side terminal 71 also has a similar structure including the electric field relaxation case shown in FIG. 6, and is fixed to the insulating support 75 with bolts, covers and supports the upper end of the vacuum valve 70, and via the connector 82. Thus, an opening 71c that allows connection to a connection conductor (such as the connector 57 in FIG. 1) is provided, and a curved surface structure is formed to relieve an electric field around the fixed electrode side terminal 71.
FIG. 7 is a schematic view of the lever shaft 79 of the vacuum circuit breaker 58 shown in FIG. 3 as viewed from the left side in FIG. The lever shaft 79 is rotatably supported by a bearing 79 d provided in an airtight lever chamber 78 attached to the base 74. A lever 79b is fixed to the lever shaft 79, and an operating rod 77a extending from the operation mechanism 77 is connected via a link 79f. The lever rod 78 passes through the operating rod 77a seal 79e while maintaining airtightness, and the lever shaft 79 is rotated by the operating mechanism 77. Each lever shaft 79 in the lever chamber 78 is fixed with an arm 79 a whose tip is connected to the drive rod 81, and the drive rod 81 is operated by the rotation of the lever shaft 79.
As described above, the vacuum circuit breaker 58 of the present invention includes, for example, a base 74 that is airtightly attached to the main body container 50 as a part of the main body container 50 of the gas insulated switchgear, and a pair of insulations provided on the outer surface of the base 74. Supports 75 and 76 are provided. A vacuum valve 70 supported by the fixed electrode side terminal 71 and the movable electrode side terminal 72 by the insulating supports 75 and 76 is also attached to the base 74. An operation mechanism 77 is provided on the inner side surface of the base. Between the operation mechanism 77 and the movable electrode side terminal 72 of the vacuum valve 70, a drive rod 81 and a contact pressure link mechanism 80 for opening and closing the vacuum valve 70 are provided. Is provided. The drive rod 81 extends through the insulating support 76 that supports the movable electrode side terminal 72 and is covered with the insulating support 76.
Further, the fixed electrode side terminal 71 and the movable electrode side terminal 72 of the vacuum valve 70 include connectors 82 and 83 that can be connected to the main circuit conductor of the gas insulated switchgear, respectively. The fixed electrode side terminal 71 and the movable electrode side terminal 72 are each provided with an electric field relaxation case.
By adopting such a configuration, the following effects can be obtained. By passing the drive member 81 through the through hole 76a of the insulating support 76, it is not necessary to dispose the drive rod 24 above the upper insulating support 19 as in the conventional example of FIG. It is possible to configure the height significantly lower than that of the configuration of FIG. Further, by increasing the electric field relaxation effect around the fixed electrode side terminal 71 and the movable electrode side terminal 72, it is possible to reduce the space insulation distance between each phase or between the grounds (between each phase and the main body container 50). Therefore, the apparatus can be configured compactly.
Further, as shown in FIG. 1 or FIG. 3, both end portions of the vacuum valve 70 are inserted into the fixed electrode side terminal 71 and the movable electrode side terminal 72, respectively, and the outer periphery of the end portion of the vacuum valve 70 is fixed electrode side terminal 71. And it is comprised so that it may cover with the movable electrode side terminal 72. FIG. By configuring in this way, it is possible to obtain a vacuum circuit breaker in which the electric field concentration at the end of the vacuum valve 70, which is likely to generate electric field concentration due to the joint between the ceramic cylinder and the metal end plate, is greatly reduced. it can.
As described above, the vacuum circuit breaker of the present invention includes a base that is hermetically attached to the container wall as a part of the container wall of the gas insulated switchgear, a pair of insulating supports provided on the base, and a fixed electrode. A vacuum valve having a side terminal and a movable electrode side terminal, both terminal portions of which are supported by the insulating support and attached to the base; an operating mechanism provided on the base; the operating mechanism and the vacuum In a vacuum circuit breaker comprising an operation link mechanism connected between the movable electrode side terminal of the valve and opening and closing the vacuum valve, the operation link mechanism extends through the insulating support. The vacuum circuit breaker is covered with the insulating support. Therefore, a vacuum circuit breaker can be reduced in size and the space insulation distance between surrounding devices can be reduced.

以上のように、本発明にかかる真空遮断器は、特にガス絶縁開閉装置等を用いた電力開閉制御用の配電盤に用いるのに適した真空遮断器として有用である。  As described above, the vacuum circuit breaker according to the present invention is particularly useful as a vacuum circuit breaker suitable for use in a switchboard for power switching control using a gas insulated switchgear.

Claims (8)

ベースと、
前記ベースの一側に配置された真空バルブと、
真空バルブの固定電極側に接続された固定側端子導体と、
真空バルブの可動電極側に接続された接点開閉リンク機構と、
真空バルブの可動電極側に接続された可動側端子導体と、
前記ベース板上に起立して前記固定側端子導体と前記可動側端子導体をそれぞれ支持する一対の絶縁支持体と、
前記ベースを挟んで前記真空バルブと反対側に装着された操作機構と、
前記絶縁支持体の内部に支持方向に沿って配置され、前記操作機構と前記接点開閉リンク機構とを連結し駆動する駆動部材とを備えた真空遮断器に於いて、
前記ベースの操作機構取付け側に、可動側端子導体を支持する絶縁支持体の中空穴に連通した気密室を設け、この中に操作機構と接点開閉リンク機構とを連結する駆動部材を連結して駆動するとともに操作棒の一端が前記気密室の壁を貫通して操作機構に連結されたレバー軸を配置したことを特徴とする真空遮断器。Base and
A vacuum valve disposed on one side of the base;
A fixed-side terminal conductor connected to the fixed electrode side of the vacuum valve;
A contact opening / closing link mechanism connected to the movable electrode side of the vacuum valve;
A movable terminal conductor connected to the movable electrode side of the vacuum valve;
A pair of insulating supports that stand on the base plate and respectively support the fixed-side terminal conductor and the movable-side terminal conductor;
An operating mechanism mounted on the opposite side of the vacuum valve across the base;
In a vacuum circuit breaker provided with a driving member disposed along the supporting direction inside the insulating support body and connected to drive the operation mechanism and the contact switching link mechanism.
An airtight chamber communicating with the hollow hole of the insulating support that supports the movable terminal conductor is provided on the operating mechanism mounting side of the base, and a driving member that connects the operating mechanism and the contact opening / closing link mechanism is connected thereto. A vacuum circuit breaker comprising a lever shaft that is driven and has one end of an operating rod penetrating the wall of the hermetic chamber and connected to an operating mechanism . 前記固定側端子導体は、前記真空バルブの固定電極側端子に当接し、真空バルブを支持する支持部と、この支持部を支持するとともに開放容器状に包囲する包囲部と、他の主回路と接離する接続端子とを備えたことを特徴とする請求項１に記載の真空遮断器。The fixed-side terminal conductor is in contact with the fixed electrode-side terminal of the vacuum valve, supports a vacuum valve, an enclosure that supports the support and surrounds in an open container shape, and other main circuits, The vacuum circuit breaker according to claim 1 , further comprising a connection terminal that contacts and separates. 前記可動側端子導体は、真空バルブの可動電極側に接続された接点開閉リンク機構を開放容器状に包囲し、他の主回路と接離する接続端子を備えたことを特徴とする請求項１に記載の真空遮断器。Said movable side terminal conductor claim 1, characterized in that surrounding the contact switching link mechanism connected to the movable electrode side of the vacuum valve in an open container shape, equipped with a connection terminal approaching and moving away from the other main circuit The vacuum circuit breaker described in 1. 前記固定側端子導体及び前記可動側端子導体の外周面は、異なる平面間を曲面で接続した曲面であることを特徴とする請求項２に記載の真空遮断器。The vacuum circuit breaker according to claim 2 , wherein outer peripheral surfaces of the fixed-side terminal conductor and the movable-side terminal conductor are curved surfaces in which different planes are connected by curved surfaces. 前記真空バルブの筒状部の両端外径部を固定側端子導体及び可動側端子導体で覆ったことを特徴とする請求項４に記載の真空遮断器。5. The vacuum circuit breaker according to claim 4 , wherein outer diameter portions at both ends of the cylindrical portion of the vacuum valve are covered with a fixed-side terminal conductor and a movable-side terminal conductor. 前記ベースは、ガス絶縁開閉装置の本体容器の一部を構成することを特徴とする請求項１に記載の真空遮断器。The vacuum circuit breaker according to claim 1 , wherein the base constitutes a part of a main body container of a gas insulated switchgear. 前記接点開閉リンク機構は、可動側端子導体で支持した接圧リンク機構であることを特徴とする請求項３に記載の真空遮断器。The vacuum circuit breaker according to claim 3 , wherein the contact opening / closing link mechanism is a contact pressure link mechanism supported by a movable terminal conductor. 前記可動側端子導体を支持する絶縁支持体は中空筒状とし、この内部に操作機構と接点開閉リンク機構とを連結し駆動する駆動部材を配置したことを特徴とする請求項１に記載の真空遮断器。Insulating support for supporting the movable-side terminal conductor is a middle empty tubular of claim 1, characterized in that a drive member for coupling to drive the operating mechanism and the contact switching linkage to the internal Vacuum circuit breaker.
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CN102262975A (en) * 2010-05-26 2011-11-30 沈阳飞驰电气设备有限公司 Heavy current vacuum circuit breaker
CN103227072A (en) * 2012-09-11 2013-07-31 中骏电气（厦门）有限公司 Integrated environment-friendly solid-sealed polar pole

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JP5297682B2 (en) * 2008-04-24 2013-09-25 株式会社明電舎 Vacuum circuit breaker
JP4693193B1 (en) * 2010-05-20 2011-06-01 株式会社日本Ａｅパワーシステムズ Cubicle type gas insulated switchgear
WO2014106912A1 (en) * 2013-01-07 2014-07-10 三菱電機株式会社 Vacuum circuit breaker
EP4270433A1 (en) * 2020-12-23 2023-11-01 Mitsubishi Electric Corporation Vacuum isolator
EP4050634B1 (en) * 2021-02-25 2023-11-15 Siemens Aktiengesellschaft Switching device for electric power distribution

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AU6007880A (en) * 1979-07-25 1981-01-29 Westinghouse Electric Corporation Vacuum circuit interrupter
JPH10247444A (en) * 1997-03-04 1998-09-14 Toshiba Corp Gas insulation vacuum circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102262975A (en) * 2010-05-26 2011-11-30 沈阳飞驰电气设备有限公司 Heavy current vacuum circuit breaker
CN103227072A (en) * 2012-09-11 2013-07-31 中骏电气（厦门）有限公司 Integrated environment-friendly solid-sealed polar pole

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