JP5023976B2 - Switchgear - Google Patents

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JP5023976B2
JP5023976B2 JP2007287933A JP2007287933A JP5023976B2 JP 5023976 B2 JP5023976 B2 JP 5023976B2 JP 2007287933 A JP2007287933 A JP 2007287933A JP 2007287933 A JP2007287933 A JP 2007287933A JP 5023976 B2 JP5023976 B2 JP 5023976B2
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circuit breaker
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drawer type
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JP2009118617A (en
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謙次 辻
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Meidensha Corp
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Description

本発明は開閉装置に関し、筐体の内部を開放空間と常閉空間とに区分し、開放空間には固体絶縁した引出形遮断器を設けたものである。   The present invention relates to a switchgear, wherein the inside of a housing is divided into an open space and a normally closed space, and a drawer type circuit breaker that is solid-insulated is provided in the open space.

金属閉鎖型スイッチギヤ等の開閉装置としては、例えば特許文献１，２に記載のものが知られている。この開閉装置は、筐体の内部に開閉器等の電気機器と該電気機器を接続する主回路導体を収容して構成され、主回路導体には高圧の電流が流れることから、相間絶縁および対地間絶縁を行うため、筐体の内部に絶縁ガスを充填している。   As an opening / closing device such as a metal closed type switchgear, for example, those disclosed in Patent Documents 1 and 2 are known. This switchgear is configured by housing an electrical device such as a switch and a main circuit conductor connecting the electrical device inside a casing, and a high-voltage current flows through the main circuit conductor. Insulation gas is filled in the inside of the housing in order to insulate it.

このように、開閉装置には絶縁のための構成が採用されており、絶縁のための構成の種類に応じて、気中絶縁開閉装置と、ガス絶縁開閉装置と、固体絶縁開閉装置との３つのタイプの開閉装置がある。   As described above, the switchgear employs a configuration for insulation. Depending on the type of configuration for insulation, the air-insulated switchgear, the gas-insulated switchgear, and the solid-insulated switchgear 3 There are two types of switchgear.

気中絶縁開閉装置は図３の（従来例１）に示すように、金属板で構成した筐体１の内部に隔壁２および着脱可能な保護カバー３を設け、引き出し可能な引出形遮断器（ＶＣＢ）４と該引出形遮断器４の遮断部を開閉操作する操作部（ＯＰ）４ａとを設け、該引出形遮断器４の一方の端子を一方の主回路導体５ａを介して主母線（ＢＵＳ）６に接続し、該引出形遮断器４の他方の主回路導体５ｂを介して電力ケーブル７に接続し、他方の主回路導体５ｂに変流器（ＣＴ）８を設けたものである。筐体１および電力ケーブル７の外覆７ａは接地されている。このような構成を採用すると、設計する際の自由度が高く、主回路導体５ａ，５ｂが露出しているため内部で作業する際に安全のため主回路導体５ａ，５ｂを接地させる作業が容易であり、引出形遮断器４を引き出す際に双方の主回路導体５ａ，５ｂとの間を断路することになり、別個に断路器（ＤＳ）を設ける必要がない。   As shown in FIG. 3 (conventional example 1), the air-insulated switchgear is provided with a partition wall 2 and a removable protective cover 3 inside a casing 1 made of a metal plate, and can be pulled out. VCB) 4 and an operation part (OP) 4a for opening and closing the interruption part of the drawer type circuit breaker 4 are provided, and one terminal of the drawer type circuit breaker 4 is connected to the main bus line (one) via one main circuit conductor 5a. BUS) 6, connected to the power cable 7 via the other main circuit conductor 5b of the lead-out type circuit breaker 4, and provided with a current transformer (CT) 8 on the other main circuit conductor 5b. . The casing 1 and the outer cover 7a of the power cable 7 are grounded. When such a configuration is adopted, the degree of freedom in designing is high, and the main circuit conductors 5a and 5b are exposed, so that the work for grounding the main circuit conductors 5a and 5b is easy for safety when working inside. Therefore, when the drawer type circuit breaker 4 is pulled out, the main circuit conductors 5a and 5b are disconnected, and there is no need to provide a separate disconnection device (DS).

ガス絶縁開閉装置は図４の（従来例２）に示すように、筐体１の内部に隔壁２を設けて絶縁ガスが充填されたガス空間１ａと大気圧空間１ｂとに区分し、該ガス空間１ａには遮断器（ＶＣＢ）９，接地開閉器付断路器（ＥＤＳ）１０・１１，接地開閉器（ＥＳ）１２と主回路導体５ａ，５ｂと主母線（ＢＵＳ）６とを収容し、大気圧空間１ｂには遮断器９等を操作する操作部（ＯＰ）９ａ，１０ａ，１１ａ，１２ａを収容し、主回路導体５ｂには筐体１の外部の電力ケーブル７を接続し、該電力ケーブル７に変流器（ＣＴ）８を設けたものである。筐体１および電力ケーブル７の外覆７ａは接地されている。このような構成を採用すると、主回路導体５ａ，５ｂはガス空間１ａに収容されているため感電事故は生じず安全であり、ガス空間１ａは密閉構造であることから湿度，塵埃，小動物などの外的影響に対する信頼性が高く、ガス空間１ａにＳＦ６ガスを使用した場合は開閉装置を大幅に小型化できる。   As shown in FIG. 4 (conventional example 2), the gas insulated switchgear is divided into a gas space 1a filled with an insulating gas and an atmospheric pressure space 1b by providing a partition wall 2 inside the housing 1, and the gas The space 1a accommodates a circuit breaker (VCB) 9, a disconnect switch with ground switch (EDS) 10 and 11, a ground switch (ES) 12, main circuit conductors 5a and 5b, and a main bus (BUS) 6. The atmospheric pressure space 1b accommodates operation units (OP) 9a, 10a, 11a, and 12a for operating the circuit breaker 9 and the like. The main circuit conductor 5b is connected to a power cable 7 outside the housing 1, and the power The cable 7 is provided with a current transformer (CT) 8. The casing 1 and the outer cover 7a of the power cable 7 are grounded. When such a configuration is adopted, the main circuit conductors 5a and 5b are housed in the gas space 1a and are safe from electric shocks. Since the gas space 1a has a sealed structure, humidity, dust, small animals, etc. The reliability with respect to external influences is high, and when SF6 gas is used in the gas space 1a, the switchgear can be greatly downsized.

固体絶縁開閉装置は図５の（従来例３）に示すように、筐体１の内部に引き出し可能な引出形遮断器（ＶＣＢ）４と該引出形遮断器４の遮断部を開閉操作する操作部（ＯＰ）４ａとを設け、該引出形遮断器４の一方の導体４ｃを一方の主回路導体５ａを介して主母線（ＢＵＳ）６に接続し、該引出形遮断器４の他方の導体４ｂを他方の主回路導体５ｂを介して電力ケーブル７に接続し、引出形遮断器４内の導体４ｂ，４ｃおよび主回路導体５ａ，５ｂ、更に主母線６を絶縁物であるモールド樹脂１３で覆い、主回路導体５ｂに変流器（ＣＴ）８を設けたものである。筐体１，電力ケーブル７の外覆７ａ，モールド樹脂１３は接地されている。このような構成を採用すると、主回路導体５ａ，５ｂがモールド樹脂１３で覆われているため感電事故は生じず安全であり、また主回路導体５ａ，５ｂはモールド樹脂１３で覆われているため湿度，塵埃，小動物などの外的影響に対する信頼性が高く、空気による絶縁を必要としないため開閉装置を大幅に小型化できる。
特開２００６−１２９６９９号公報 特開２００６−１１５６９８号公報 As shown in FIG. 5 (conventional example 3), the solid-insulated switchgear is an operation for opening / closing a drawer type circuit breaker (VCB) 4 that can be pulled out into the housing 1 and a blocking part of the drawer type circuit breaker 4. Part (OP) 4a, one conductor 4c of the lead-out type circuit breaker 4 is connected to the main bus (BUS) 6 through one main circuit conductor 5a, and the other conductor of the lead-out type circuit breaker 4 4b is connected to the power cable 7 through the other main circuit conductor 5b, and the conductors 4b and 4c and the main circuit conductors 5a and 5b in the lead-out type circuit breaker 4 and the main bus bar 6 are molded resin 13 as an insulator. A current transformer (CT) 8 is provided on the main circuit conductor 5b. The casing 1, the outer cover 7a of the power cable 7, and the mold resin 13 are grounded. If such a configuration is adopted, the main circuit conductors 5a and 5b are covered with the mold resin 13, so that an electric shock does not occur and the main circuit conductors 5a and 5b are covered with the mold resin 13. It is highly reliable against external influences such as humidity, dust, and small animals, and does not require air insulation, so the switchgear can be greatly downsized.
JP 2006-129699 A JP 2006-115698 A

ところが、前記気中絶縁開閉装置は、主回路導体が露出するため、人が触れるおそれがあり安全性が確保されず、また湿度，塵埃による主回路導体の腐食や小動物による事故を生じる虞がある。   However, since the main circuit conductor is exposed in the air-insulated switchgear, there is a risk that it may be touched by humans and safety is not ensured, and the main circuit conductor may be corroded by humidity and dust, or an accident caused by a small animal may occur. .

前記ガス絶縁開閉装置は、ガス空間の点検作業を安全に行うための主回路導体の接地を大気圧空間で行なうことができず、回路構成によっては接地開閉器（ＥＳ）を設ける必要があり、遮断器（ＶＣＢ）はガス空間に配置するために固定構造を採用することになり遮断器の上下位置に回路を開く断路器（ＤＳ）が必要となることから、前記接地開閉器とを合体させた接地開閉器付断路器（ＥＤＳ）を設けなければならず、絶縁ガスとしてＳＦ６ガスを使用した場合は、ＳＦ６ガスが地球温暖化防止排出抑制対策ガスであるために回収装置等を設けなければならない。   The gas insulated switchgear cannot perform grounding of the main circuit conductor for safely performing inspection work of the gas space in the atmospheric pressure space, and it is necessary to provide a grounding switch (ES) depending on the circuit configuration, Since the circuit breaker (VCB) adopts a fixed structure to be arranged in the gas space, and a disconnecting device (DS) is required to open the circuit at the upper and lower positions of the circuit breaker, the grounding switch is combined. In addition, if SF6 gas is used as the insulating gas, a recovery device or the like must be provided because SF6 gas is a global warming prevention emission control measure gas. Don't be.

前記固体絶縁開閉装置は、モールド樹脂を設けることになるため設計の自由度が低く、モールド樹脂によりモールドする際のリードタイムが長いため生産性が低い。   Since the solid insulation switchgear is provided with a mold resin, the degree of freedom in design is low, and the productivity is low due to the long lead time when molding with the mold resin.

そこで本発明は、上記の課題を解決し、人に対する安全性と外的影響に対する信頼性と設計の自由度と生産性とが高く、生産コストが低い開閉装置を提供することを目的とする。   Accordingly, an object of the present invention is to solve the above-described problems, and to provide a switchgear having high safety for humans, reliability against external influences, high degree of design freedom and productivity, and low production cost.

請求項１に係る発明は、筐体の内部に遮断器を収容し、該遮断器は遮断部と該遮断部に接続された一対の導体とを備え、該一対の導体の一方の端部には一方の主回路導体を介して主母線を接続し、他方の端部には他方の主回路導体および筐体の外部に接続されたケーブルを介して外部電源に接続した開閉装置において、
前記筐体に隔壁を設けて開放空間と常閉空間とを形成し、前記開放空間には前記遮断器として引出形遮断器を収容し、前記常閉空間には前記一方の主回路導体と前記他方の主回路導体と前記主母線とを収容し、
前記引出形遮断器の前記一対の導体および前記遮断部を絶縁カバーで被覆し、
前記常閉空間の夫々の主回路導体の一端を、凹部を有する絶縁ブッシングを介して前記隔壁に気密に貫通させ、該主回路導体の一端と前記引出形遮断器の前記導体の端部とが接続された状態では、前記導体の端部を被覆する前記絶縁カバーの端部を前記凹部に嵌合し、
前記導体の端部が前記主回路導体の一端から離れた断路位置において、前記絶縁カバーの端部が前記凹部に嵌合していることを特徴とする。 The invention according to claim 1 houses a circuit breaker inside a housing, the circuit breaker comprising a circuit breaker and a pair of conductors connected to the circuit breaker, and at one end of the pair of conductors In the switchgear connected to the external power supply via a cable connected to the outside of the other main circuit conductor and the casing at the other end connected to the main bus via one main circuit conductor,
A partition is provided in the housing to form an open space and a normally closed space, a drawer type circuit breaker is accommodated in the open space as the circuit breaker, and the one main circuit conductor and the Housing the other main circuit conductor and the main bus;
Covering the pair of conductors and the breaker of the drawer type circuit breaker with an insulating cover ,
One end of each main circuit conductor in the normally closed space is hermetically penetrated through the partition wall through an insulating bushing having a recess, and one end of the main circuit conductor and the end of the conductor of the drawer type circuit breaker are In the connected state, the end of the insulating cover covering the end of the conductor is fitted into the recess,
The end portion of the insulating cover is fitted in the recess at the disconnection position where the end portion of the conductor is separated from one end of the main circuit conductor .

この発明によれば、引出形遮断器が「断路位置」を占める時は絶縁ブッシングの凹部へ絶縁カバーの端部を嵌合した状態が維持されているので、主回路導体や引出形遮断器の導体に人が接触することはなく、かつ断路状態で塵埃や小動物が絶縁ブッシングの内部へ入ることもない。   According to the present invention, when the drawer type circuit breaker occupies the “disconnection position”, the state in which the end portion of the insulating cover is fitted to the recess of the insulating bushing is maintained. There is no human contact with the conductor, and no dust or small animals enter the insulation bushing in the disconnected state.

請求項１に係る発明によれば、引出形遮断器が「断路位置」を占める時は絶縁ブッシングの凹部へ絶縁カバーの端部が嵌合された状態が維持されるので、絶縁ブッシングの内部が閉塞され、安全性と信頼性が維持される。 According to the first aspect of the invention, when the drawer type circuit breaker occupies the “disconnection position”, the state in which the end portion of the insulating cover is fitted to the concave portion of the insulating bushing is maintained. It is occluded and safety and reliability are maintained.

以下、本発明による開閉装置の実施の形態を図１に基づいて説明する。   Hereinafter, an embodiment of a switchgear according to the present invention will be described with reference to FIG.

筐体１の内部に隔壁２が設けられると共に該隔壁２の右側には密封容器１ｃが収容され、常閉空間としての密封空間１ａと開放空間としての大気圧空間１ｂとが形成されている。１ｄは正面に設けられた扉である。前記大気圧空間１ｂには遮断器としての引出形遮断器１４が収容されている。該引出形遮断器１４は遮断部１４ｃと該遮断部１４ｃに接続された一対の導体１４ａ，１４ｂとを備えており、該遮断部１４ｃを開閉操作する操作部１４ｅが設けられている。一方、前記密封空間１ａには主回路導体５ａと主回路導体５ｂと主母線６とが収容されている。   A partition wall 2 is provided inside the housing 1, and a sealed container 1c is accommodated on the right side of the partition wall 2. A sealed space 1a as a normally closed space and an atmospheric pressure space 1b as an open space are formed. 1d is a door provided on the front. A drawer type circuit breaker 14 as a circuit breaker is accommodated in the atmospheric pressure space 1b. The pull-out type circuit breaker 14 includes a blocking portion 14c and a pair of conductors 14a and 14b connected to the blocking portion 14c, and an operation portion 14e for opening and closing the blocking portion 14c is provided. On the other hand, the main circuit conductor 5a, the main circuit conductor 5b, and the main bus 6 are accommodated in the sealed space 1a.

そして、前記導体１４ａの端部には主回路導体５ａを介して主母線６が接続されている。一方、前記導体１４ｂの端部には主回路導体５ｂが接続され、該主回路導体５ｂにはケーブルとしての電力ケーブル７が接続され、電力ケーブル７は外部電源に接続されている。   The main bus 6 is connected to the end of the conductor 14a via the main circuit conductor 5a. On the other hand, a main circuit conductor 5b is connected to the end of the conductor 14b, and a power cable 7 as a cable is connected to the main circuit conductor 5b, and the power cable 7 is connected to an external power source.

前記引出形遮断器１４の一対の導体１４ａ，１４ｂおよび遮断部１４ｃは絶縁カバー１４ｄにより被覆されている。この絶縁カバー１４ｄは、量産可能な部品のみを絶縁物で覆って絶縁カバーとしたものであり、従来の固体絶縁開閉装置の場合とは異なって、絶縁すべき最小限の部品のみが絶縁されている。また、従来の固体絶縁開閉装置のように組み立て後にモールド樹脂で覆ったものではなく、導体１４ａ，１４ｂ等の部品の状態において予め絶縁カバー１４ｄを装着したものである。前記のように絶縁すべき最小限の部品のみに絶縁カバー１４ｄを設けるので、絶縁材料の使用量も少なく、モールド樹脂で覆う場合に比べて生産性が高く設計の自由度も高い。   The pair of conductors 14a and 14b and the breaking portion 14c of the drawer type circuit breaker 14 are covered with an insulating cover 14d. This insulating cover 14d is an insulating cover that covers only parts that can be mass-produced with an insulating material. Unlike the conventional solid-insulated switchgear, only the minimum parts to be insulated are insulated. Yes. Moreover, it is not what was covered with mold resin after the assembly like the conventional solid insulated switchgear, but was equipped with the insulating cover 14d in the state of components such as the conductors 14a and 14b. Since the insulating cover 14d is provided only on the minimum parts to be insulated as described above, the amount of the insulating material used is small, and the productivity is high and the degree of design freedom is high as compared with the case where it is covered with the mold resin.

密封空間１ａの夫々の主回路導体５ａ，５ｂの一端は、絶縁ブッシング１５を介して前記隔壁２および密封容器１ｃに気密に貫通している。絶縁ブッシング１５には筒部１５ａが形成され、該筒部１５ａの内部に凹部１５ｂが形成されている。そして、引出形遮断器１４の導体１４ａ，１４ｂの端部と主回路導体５ａ，５ｂの一端との接続時には、該凹部１５ｂに、導体１４ａ，１４ｂの端部を被覆する絶縁カバー１４ｄの端部が嵌合されている。   One end of each main circuit conductor 5a, 5b of the sealed space 1a passes through the partition wall 2 and the sealed container 1c through an insulating bushing 15 in an airtight manner. The insulating bushing 15 is formed with a cylindrical portion 15a, and a concave portion 15b is formed inside the cylindrical portion 15a. When connecting the end portions of the conductors 14a and 14b of the lead-type circuit breaker 14 and one end of the main circuit conductors 5a and 5b, the end portion of the insulating cover 14d that covers the end portions of the conductors 14a and 14b on the recess portion 15b. Is fitted.

図２（ａ）（ｂ）（ｃ）に示すように、引出形遮断器１４は、「接続位置」，「断路位置」，「切り離し位置」の３位置を占めることができるように構成されている。そして、図２（ｂ）に示すように、導体１４ａ，１４ｂの端部が主回路導体５ａ，５ｂの一端から離れた引出形遮断器１４の断路状態においても、絶縁カバー１４ｄの端部が凹部１５ｂに嵌合しているように構成されている。つまり、絶縁ブッシング１５の筒部１５ａの長さは十分に長い値に設定されている。   As shown in FIGS. 2A, 2B, and 2C, the drawer type circuit breaker 14 is configured to be able to occupy three positions of "connection position", "disconnection position", and "disconnection position". Yes. As shown in FIG. 2 (b), the end portion of the insulating cover 14d is recessed even when the end portion of the conductor circuit 14a, 14b is disconnected from the one end of the main circuit conductors 5a, 5b. It is comprised so that it may fit in 15b. That is, the length of the cylindrical portion 15a of the insulating bushing 15 is set to a sufficiently long value.

主回路導体５ｂには変流器（ＣＴ）８が設けられている。主回路導体５ｂの他端への電力ケーブル７の一端の接続部は、筐体１および密封容器１ｃを貫通する位置に配置され、電力ケーブル７はケーブルヘッド７ｂを介して着脱可能に設けられている。電力ケーブル７には絶縁のための外覆７ａが設けられ、該外覆７ａおよび前記筐体１は接地されている。   The main circuit conductor 5b is provided with a current transformer (CT) 8. A connection portion of one end of the power cable 7 to the other end of the main circuit conductor 5b is disposed at a position penetrating the casing 1 and the sealed container 1c, and the power cable 7 is provided detachably via the cable head 7b. Yes. The power cable 7 is provided with an outer cover 7a for insulation, and the outer cover 7a and the casing 1 are grounded.

次に、開閉装置の作用を説明する。引出形遮断器１４を閉状態にする場合には、図２（ａ）に示すように引出形遮断器１４を「接続位置」に配置し、操作部１４ｅを操作して遮断部１４ｃを閉じる。一方、遮断部１４ｃを開状態にする場合には、操作部１４ｅを前記とは逆方向へ操作する。遮断部１４ｃが開いて遮断された状態で図２（ｂ）に示すように引出形遮断器１４を「断路位置」まで引き出すと、導体１４ａ，１４ｂが主回路導体５ａ，５ｂから離れて断路状態になる。このとき、導体１４ａ，１４ｂは主回路導体５ａ，５ｂから切り離されるが、絶縁カバー１４ｄの端部は筒部１５ａの凹部１５ｂに嵌合された状態を維持しており、絶縁ブッシング１５の内部は閉塞されている。図２（ｃ）に示すように引出形遮断器１４を「切り離し位置」まで引き出すと、導体１４ａ，１４ｂおよび主回路導体５ａ，５ｂが露出する。従って、これらを接地することが可能となる。引出形遮断器１４は大気圧空間１ｂに引き出しが可能に設けているので、引出形遮断器１４を引き出して保守点検を行なったり、引出形遮断器１４に不具合が生じた場合は引出形遮断器１４を引き出して部品交換したり引出形遮断器１４自体を交換したりすることができ、現地での作業時間を短縮することができる。   Next, the operation of the switchgear will be described. When the drawer type circuit breaker 14 is closed, the drawer type circuit breaker 14 is arranged at the “connection position” as shown in FIG. 2A, and the operation unit 14e is operated to close the circuit breaker 14c. On the other hand, when the blocking unit 14c is opened, the operation unit 14e is operated in the opposite direction. When the pull-out type circuit breaker 14 is pulled out to the “disconnection position” as shown in FIG. 2B with the interrupting portion 14c opened and disconnected, the conductors 14a and 14b are separated from the main circuit conductors 5a and 5b and disconnected. become. At this time, the conductors 14a and 14b are separated from the main circuit conductors 5a and 5b, but the end of the insulating cover 14d is maintained in a state of being fitted in the recess 15b of the cylindrical portion 15a. It is blocked. When the pull-out type circuit breaker 14 is pulled out to the “cutting position” as shown in FIG. 2C, the conductors 14a and 14b and the main circuit conductors 5a and 5b are exposed. Therefore, they can be grounded. Since the drawer type circuit breaker 14 is provided in the atmospheric pressure space 1b so that it can be pulled out, the drawer type circuit breaker 14 is pulled out for maintenance and inspection, or when a problem occurs in the drawer type circuit breaker 14, the drawer type circuit breaker 14 It is possible to replace the parts by pulling out 14 or to replace the drawer type circuit breaker 14 itself, thereby shortening the work time at the site.

この発明によれば、主回路導体５ａ，５ｂおよび主母線６を密封容器１ｃに収容したので、密封容器１ｃには人が入ることができず、人が主回路導体５ａ，５ｂ，主母線６に接触することがなくなり、しかも密封容器１ｃには水分や塵埃や小動物が入ることもない。従って、感電事故や、主回路導体５ａ，５ｂの腐食や、小動物による事故は生じない。また、引出形遮断器１４を採用するので、引出形遮断器１４を遮断して引出形遮断器１４を大気圧空間１ｂへ引き出すと断路を行ったことになる。更に引出形遮断器１４を大気圧空間１ｂへ引き出すことにより主回路導体５ａ，５ｂが露出するので、主回路導体５ａ，５ｂを接地することが可能になる。   According to the present invention, since the main circuit conductors 5a and 5b and the main bus 6 are accommodated in the sealed container 1c, a person cannot enter the sealed container 1c, and the person cannot enter the main circuit conductors 5a and 5b and the main bus 6 In addition, water, dust and small animals do not enter the sealed container 1c. Therefore, an electric shock accident, corrosion of the main circuit conductors 5a and 5b, and an accident caused by a small animal do not occur. Further, since the drawer type circuit breaker 14 is adopted, the disconnection is performed when the drawer type circuit breaker 14 is cut off and the drawer type circuit breaker 14 is pulled out to the atmospheric pressure space 1b. Furthermore, since the main circuit conductors 5a and 5b are exposed by pulling out the drawer type circuit breaker 14 to the atmospheric pressure space 1b, the main circuit conductors 5a and 5b can be grounded.

この発明によれば、引出形遮断器１４が「接続位置」を占める時には絶縁ブッシング１５の凹部１５ｂに絶縁カバー１４ｄの端部が嵌合されて高圧部が保護される。   According to the present invention, when the drawer type circuit breaker 14 occupies the “connection position”, the end of the insulating cover 14d is fitted into the concave portion 15b of the insulating bushing 15 to protect the high-pressure portion.

この発明によれば、引出形遮断器１４が「断路位置」を占める時は絶縁ブッシング１５の凹部１５ｂへ絶縁カバー１４ｄの端部を嵌合した状態が維持されているので、主回路導体５ａ，５ｂや引出形遮断器１４の導体１４ａ，１４ｂに人が接触することはなく、かつ断路状態で塵埃や小動物が絶縁ブッシング１５の内部へ入ることもない。   According to the present invention, when the drawer type circuit breaker 14 occupies the “disconnection position”, the state in which the end of the insulating cover 14d is fitted to the recess 15b of the insulating bushing 15 is maintained, so that the main circuit conductor 5a, 5b and the conductors 14a and 14b of the drawer type circuit breaker 14 do not come into contact with humans, and dust and small animals do not enter the insulating bushing 15 in the disconnected state.

なお、本実施の形態では、主回路を開閉する開閉装置に本発明に係る開閉装置を適用した場合を示したが、計器用変圧器（ＶＴ）や接地形計器用変圧器（ＥＶＴ）等のように、試験時に電気的に切り離しすることが必要な機器が接続される接続部に適用することもできる。   In the present embodiment, the case where the switchgear according to the present invention is applied to the switchgear that opens and closes the main circuit is shown. However, such as a meter transformer (VT) or a grounded meter transformer (EVT), etc. As described above, the present invention can be applied to a connection portion to which a device that needs to be electrically disconnected during a test is connected.

開閉装置を示す構成図（実施の形態）。The block diagram which shows the switchgear (embodiment). 開閉装置の作用説明図（実施の形態）。Action | operation explanatory drawing (embodiment) of the switchgear. 気中絶縁開閉装置を示す構成図（従来例１）。The block diagram which shows an air insulation switchgear (conventional example 1). ガス絶縁開閉装置を示す構成図（従来例２）。The block diagram which shows a gas insulated switchgear (conventional example 2). 固体絶縁開閉装置を示す構成図（従来例３）。The block diagram which shows a solid insulated switchgear (conventional example 3).

符号の説明Explanation of symbols

１…筐体
１ａ…大気圧空間（開放空間）
１ｂ…密封空間（常閉空間）
２…隔壁
５ａ，５ｂ…主回路導体
６…主母線
７…電源ケーブル（ケーブル）
１４…引出形遮断器
１４ａ，１４ｂ…導体
１４ｃ…遮断部
１４ｄ…絶縁カバー
１５…絶縁ブッシング
１５ａ…筒部
１５ｂ…凹部 1 ... Case 1a ... Atmospheric pressure space (open space)
1b ... sealed space (normally closed space)
2 ... Bulkhead 5a, 5b ... Main circuit conductor 6 ... Main bus 7 ... Power cable (cable)
DESCRIPTION OF SYMBOLS 14 ... Pull-out type circuit breaker 14a, 14b ... Conductor 14c ... Breaking part 14d ... Insulating cover 15 ... Insulating bushing 15a ... Cylindrical part 15b ... Recessed part

Claims (1)

筐体の内部に遮断器を収容し、該遮断器は遮断部と該遮断部に接続された一対の導体とを備え、該一対の導体の一方の端部には一方の主回路導体を介して主母線を接続し、他方の端部には他方の主回路導体および筐体の外部に接続されたケーブルを介して外部電源に接続した開閉装置において、
前記筐体に隔壁を設けて開放空間と常閉空間とを形成し、前記開放空間には前記遮断器として引出形遮断器を収容し、前記常閉空間には前記一方の主回路導体と前記他方の主回路導体と前記主母線とを収容し、
前記引出形遮断器の前記一対の導体および前記遮断部を絶縁カバーで被覆し、
前記常閉空間の夫々の主回路導体の一端を、凹部を有する絶縁ブッシングを介して前記隔壁に気密に貫通させ、該主回路導体の一端と前記引出形遮断器の前記導体の端部とが接続された状態では、前記導体の端部を被覆する前記絶縁カバーの端部を前記凹部に嵌合し、
前記導体の端部が前記主回路導体の一端から離れた断路位置において、前記絶縁カバーの端部が前記凹部に嵌合していることを特徴とする開閉装置。 A circuit breaker is accommodated in the housing, and the circuit breaker includes a circuit breaker and a pair of conductors connected to the circuit breaker, and one main circuit conductor is interposed at one end of the pair of conductors. In the switchgear connected to the external power supply via the other main circuit conductor and the cable connected to the outside of the housing,
A partition is provided in the housing to form an open space and a normally closed space, a drawer type circuit breaker is accommodated in the open space as the circuit breaker, and the one main circuit conductor and the Housing the other main circuit conductor and the main bus;
Covering the pair of conductors and the breaker of the drawer type circuit breaker with an insulating cover ,
One end of each main circuit conductor in the normally closed space is hermetically penetrated through the partition wall through an insulating bushing having a recess, and one end of the main circuit conductor and the end of the conductor of the drawer type circuit breaker are In the connected state, the end of the insulating cover covering the end of the conductor is fitted into the recess,
The switchgear characterized in that the end of the insulating cover is fitted in the recess at the disconnection position where the end of the conductor is separated from one end of the main circuit conductor .
JP2007287933A 2007-11-05 2007-11-05 Switchgear Active JP5023976B2 (en)

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CA2915098C (en) 2013-07-17 2019-12-31 Schneider Electric USA, Inc. Internal arc management and ventilation for electrical equipment

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JPS5035301Y1 (en) * 1968-08-03 1975-10-15
JPS5122270U (en) * 1974-08-05 1976-02-18
JPS6142204A (en) * 1984-08-03 1986-02-28 株式会社日立製作所 Integrated switchboard
JPH05328545A (en) * 1992-05-15 1993-12-10 Toshiba Corp Switch gear
JPH0870508A (en) * 1994-08-31 1996-03-12 Toshiba Corp Switch device

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