JP2005108766A - Double-break vacuum circuit breaker - Google Patents

Double-break vacuum circuit breaker Download PDF

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JP2005108766A
JP2005108766A JP2003343421A JP2003343421A JP2005108766A JP 2005108766 A JP2005108766 A JP 2005108766A JP 2003343421 A JP2003343421 A JP 2003343421A JP 2003343421 A JP2003343421 A JP 2003343421A JP 2005108766 A JP2005108766 A JP 2005108766A
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vacuum vessel
vacuum
circuit breaker
movable electrode
pairs
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Naohiro Kaneman
直弘 金万
Takashi Ota
剛史 太田
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Nissin Electric Co Ltd
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Nissin Electric Co Ltd
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Priority to JP2003343421A priority Critical patent/JP2005108766A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing 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

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a double-break vacuum circuit breaker which can be miniaturized by simplifying an operating mechanism. <P>SOLUTION: Two pairs of cutoff parts 2 are disposed in parallel in a vacuum vessel 1 made of metal. Two movable electrodes 4 are connected by a connecting conductor 12 in the vacuum vessel. The connecting conductor is linked to an operating rod 14 through an insulation 13 in the vacuum vessel. Since two pairs of cutoff parts are stored in one vacuum vessel, the whole apparatus can be miniaturized. In addition, since two pairs of cutoff parts are disposed in parallel, and the moving direction of each movable electrode and the operating rod can be made identical, an operating mechanism is simplified. Furthermore, since the cutoff parts and the operating rod are insulated by the insulation in the vacuum vessel, it is not required to make up the operating rod by the insulation. Also, since the insulation is disposed in the vacuum vessel, it is not required to take a large creeping distance, and the operating mechanism can be miniaturized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、２対の遮断部を同時に開極して電流を遮断する２点切り真空遮断器に関するものである。   The present invention relates to a two-point cut-off vacuum circuit breaker that simultaneously opens two pairs of breakers to cut off current.

２点切り真空遮断器として種々のタイプのものが提案されている。
第１のタイプとして、真空バルブ２本を、固定電極が外側になるように一直線上に配置し、その中間部分において、可動電極を操作器にて開閉操作をするものがある。
第２のタイプとして、真空バルブを平行に配置し、それぞれの可動電極を１つの操作器により開閉するものがある。 Various types of two-point vacuum circuit breakers have been proposed.
As a first type, two vacuum valves are arranged in a straight line so that the fixed electrode is on the outside, and the movable electrode is opened / closed by an operating device at an intermediate portion thereof.
As a second type, there is a type in which vacuum valves are arranged in parallel and each movable electrode is opened and closed by one operating device.

図１を用いて、上記第１のタイプの真空遮断器を説明する。
２本の真空バルブ３１、３２が、固定電極が外側に、可動電極が内側になるように、絶縁容器３３内に一直線上に配置される。絶縁容器３３内には高気圧ＳＦ６ガスが充填される。２本の真空バルブ３１、３２の可動電極が、摺動接触子を介して接続導体３８により接続される。これにより、２対の遮断部が直列に接続される。 The first type vacuum circuit breaker will be described with reference to FIG.
Two vacuum valves 31 and 32 are arranged in a straight line in the insulating container 33 so that the fixed electrode is on the outside and the movable electrode is on the inside. The insulating container 33 is filled with high-pressure SF6 gas. The movable electrodes of the two vacuum valves 31 and 32 are connected by a connection conductor 38 through sliding contacts. Thereby, two pairs of interruption | blocking parts are connected in series.

各可動電極が、リンク部３５を介して絶縁操作棒３６に連結され、図示しない操作器に連結される。絶縁操作棒３６が図示しない操作器により図示上下方向に操作されると、リンク部３５により可動電極の水平方向の動きに変換され、２本の真空バルブの遮断部が同時に開閉操作される。絶縁操作棒３６は、高電位にある遮断部と接地電位にある操作器とを電気的に絶縁するために、絶縁部材により構成される。
特許文献１に、第１のタイプの真空遮断器のほかの例が記載されている。 Each movable electrode is connected to an insulating operation rod 36 via a link portion 35 and connected to an operating device (not shown). When the insulating operation rod 36 is operated in the vertical direction in the figure by an operating device (not shown), the link part 35 converts the movement of the movable electrode into the horizontal direction, and the shut-off parts of the two vacuum valves are simultaneously opened and closed. The insulating operation rod 36 is composed of an insulating member in order to electrically insulate the interrupting portion at a high potential from the operating device at the ground potential.
Patent Document 1 describes another example of the first type vacuum circuit breaker.

図２を用いて、上記第２のタイプの真空遮断器を説明する。
上記第１のタイプは、複雑なリンク機構を必要とするという問題がある。これに対して、リンク機構を不要とする第２のタイプの真空遮断器が提案されている。
２本の真空バルブ３１、３２が、固定電極同士が隣接し、可動電極同士が隣接するように、気密容器３７内に平行に配置される。気密容器３７内には高気圧ＳＦ６ガスが充填される。２本の真空バルブ３１、３２の可動電極同士が、摺動接触子を介して接続導体３８により接続される。これにより、２対の遮断部が直列に接続される。 The second type vacuum circuit breaker will be described with reference to FIG.
The first type has a problem that a complicated link mechanism is required. On the other hand, the 2nd type vacuum circuit breaker which does not require a link mechanism is proposed.
Two vacuum valves 31 and 32 are arranged in parallel in the airtight container 37 so that the fixed electrodes are adjacent to each other and the movable electrodes are adjacent to each other. The airtight container 37 is filled with high-pressure SF6 gas. The movable electrodes of the two vacuum valves 31 and 32 are connected to each other by a connection conductor 38 via a sliding contact. Thereby, two pairs of interruption | blocking parts are connected in series.

各可動電極が、連結部３９により連結されて、絶縁操作棒３６により操作器４０に連結される。操作器４０が絶縁操作棒３６を図示左右方向に移動させることにより、２本の真空バルブ３１、３２の遮断部が同時に開閉操作される。絶縁操作棒３６は、高電位にある遮断部と接地電位にある操作器４０とを電気的に絶縁するために、絶縁部材により構成される。   Each movable electrode is connected by a connecting portion 39 and is connected to an operating device 40 by an insulating operation rod 36. When the operating device 40 moves the insulating operation rod 36 in the left-right direction in the drawing, the shut-off portions of the two vacuum valves 31 and 32 are simultaneously opened and closed. The insulating operation rod 36 is made of an insulating member in order to electrically insulate the interrupting portion at a high potential from the operating device 40 at the ground potential.

特許文献２に、上記第２のタイプの真空遮断器のほかの例が記載されている。
特許文献３に、上記第２のタイプの真空遮断器において、真空バルブを容器に収納する代わりにモールドするタイプが記載されている。
特許文献４に、２点切り真空遮断器ではないが、１つの真空容器内に主回路開閉部と接地開閉部の２つの開閉部を配置する真空遮断器が記載されている。 Patent Document 2 describes another example of the second type vacuum circuit breaker.
Patent Document 3 describes a type in which the vacuum valve is molded instead of being housed in a container in the second type vacuum circuit breaker.
Patent Document 4 describes a vacuum circuit breaker that is not a two-point cut-off vacuum circuit breaker, but arranges two switch parts of a main circuit switch part and a ground switch part in one vacuum vessel.

特許第３２３７４４５号公報Japanese Patent No. 3237445 特開平１０−１７８７１３号公報JP-A-10-178713 特開２００２−１５２９３０号公報JP 2002-152930 A 特開２００１−１２６５９５号公報JP 2001-126595 A

以上説明した第１及び第２のタイプの真空遮断器は、いずれも、１つの遮断部を１つの真空容器に収納した真空バルブを２本使用し、これを直列接続することで２点切り真空遮断器を形成している。このため装置が大型化している。
また、第１及び第２のタイプの真空遮断器はいずれも、高電位にある遮断部と接地電位にある操作器とを電気的に絶縁する絶縁操作棒が、真空容器外に配置されている。そのため、絶縁操作棒の沿面距離を長くする必要があり、装置が大型化するという問題がある。 Each of the first and second type vacuum circuit breakers described above uses two vacuum valves in which one breaker is housed in one vacuum vessel and is connected in series to form a two-point vacuum. A circuit breaker is formed. For this reason, the apparatus is increased in size.
In addition, in both the first and second types of vacuum circuit breakers, an insulating operation rod that electrically insulates the breaker at a high potential from the operation device at the ground potential is disposed outside the vacuum vessel. . Therefore, it is necessary to increase the creepage distance of the insulating operation rod, and there is a problem that the apparatus becomes large.

本発明は、操作機構を簡素化し、小型化が可能な２点切り真空遮断器を得ることを目的とするものである。   An object of the present invention is to obtain a two-point vacuum circuit breaker capable of simplifying the operation mechanism and reducing the size.

本発明は、上記目的を達成するためになされたものである。本発明は、直列接続された２対の遮断部を同時に開極して電流を遮断する２点切り真空遮断器であって、金属製の真空容器内に２対の遮断部を平行に配置する。遮断部の固定電極は、絶縁筒を介して前記真空容器に支持される。２対の可動電極は、真空容器内で接続導体により接続される。接続導体は、真空容器内で絶縁物を介して操作棒に連結される。前記操作棒と前記真空容器との間は、絶縁筒を介して前記真空容器に取り付けられた封止手段により封止される。   The present invention has been made to achieve the above object. The present invention is a two-point cut-off vacuum circuit breaker that simultaneously opens two pairs of breakers connected in series to cut off current, and the two pairs of breakers are arranged in parallel in a metal vacuum vessel. . The fixed electrode of the blocking part is supported by the vacuum vessel via an insulating cylinder. The two pairs of movable electrodes are connected by a connection conductor in the vacuum vessel. The connecting conductor is connected to the operating rod through an insulator in the vacuum vessel. The operating rod and the vacuum vessel are sealed by a sealing means attached to the vacuum vessel via an insulating cylinder.

本発明によれば、２対の遮断部が１つの真空容器内に収納されるので、２つの真空容器内にそれぞれ遮断部を収納するものと比べて、装置全体を小型化することができる。また、２対の遮断部が平行に配置され、各可動電極と操作棒の移動方向を同じにすることができるので、操作機構が簡単化される。さらに、遮断部と操作棒との間が真空容器内で絶縁物により絶縁されることにより、操作棒を絶縁物で構成する必要がなくなる。また、絶縁物は、真空容器内に配置されるので、沿面距離を大きく取る必要がなくなリ、操作機構を小型化することができる。   According to the present invention, since the two pairs of blocking portions are accommodated in one vacuum vessel, the entire apparatus can be reduced in size as compared with the case where the blocking portions are accommodated in the two vacuum vessels. In addition, since the two pairs of blocking portions are arranged in parallel and the moving directions of the movable electrodes and the operating rod can be made the same, the operating mechanism is simplified. Furthermore, since the gap between the blocking portion and the operating rod is insulated by an insulator in the vacuum vessel, it is not necessary to configure the operating rod with an insulator. Further, since the insulator is disposed in the vacuum vessel, it is not necessary to increase the creepage distance, and the operation mechanism can be downsized.

本発明は、２つの可動電極に絶縁物を介して連結された２本の操作棒を、真空容器の外部で相互に連結して操作器に連結することもできる。この場合、２つの可動電極同士は、フレキシブル導体により真空容器内で接続される。   In the present invention, two operating rods connected to two movable electrodes via an insulator can be connected to an operating device by connecting them together outside the vacuum vessel. In this case, the two movable electrodes are connected to each other in the vacuum container by a flexible conductor.

本発明によれば、操作機構を簡素化し、小型化された２点切り真空遮断器を得ることができる。   According to the present invention, an operation mechanism can be simplified and a two-point vacuum circuit breaker with a reduced size can be obtained.

以下、本発明の実施例について図を用いて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図３を用いて、本発明の第１の実施例を説明する。
金属製の真空容器１内に、遮断部２が平行に２対配置される。遮断部２は、固定電極３と可動電極４を含む。遮断部２の周囲は、それぞれ別個にアークシールド５により囲われる。
固定電極３は、固定電極棒６により支持され、固定電極棒６は、端板７、絶縁筒８を介して、真空容器１に支持される。２つの固定電極棒６は、一方が母線側端子９、他方が負荷側端子１０となる。 A first embodiment of the present invention will be described with reference to FIG.
In the metal vacuum vessel 1, two pairs of blocking portions 2 are arranged in parallel. The blocking unit 2 includes a fixed electrode 3 and a movable electrode 4. The surroundings of the blocking part 2 are individually surrounded by the arc shield 5.
The fixed electrode 3 is supported by a fixed electrode rod 6, and the fixed electrode rod 6 is supported by the vacuum vessel 1 through an end plate 7 and an insulating cylinder 8. One of the two fixed electrode rods 6 is a bus side terminal 9 and the other is a load side terminal 10.

可動電極４は可動電極棒１１により支持され、２本の可動電極棒１１は、真空容器１内で接続導体１２により連結される。これにより、母線側端子９と負荷側端子１０との間に、２対の遮断部２が直列接続された構成となる。
このように、２つの可動電極４は接続導体１２により直接接続されるので、図１、図２に示した従来例と異なり、摺動接触子などを必要としない簡単な構造とすることができる。 The movable electrode 4 is supported by a movable electrode rod 11, and the two movable electrode rods 11 are connected by a connection conductor 12 in the vacuum vessel 1. Thereby, it becomes the structure by which 2 pairs of interruption | blocking parts 2 were connected in series between the bus-line side terminal 9 and the load side terminal 10. FIG.
Thus, since the two movable electrodes 4 are directly connected by the connecting conductor 12, unlike the conventional example shown in FIGS. 1 and 2, a simple structure that does not require a sliding contact or the like can be achieved. .

接続導体１２は、絶縁物１３を介して操作棒１４と連結される。
真空中で有機絶縁材料を使用するとガス放出の問題が発生するため、絶縁物１３としてはセラミックなどの無機絶縁材料が使用される。絶縁物１３が真空中に配置されることにより、沿面距離を大きく取らなくても所定の絶縁性能を得ることができる。このため、絶縁物１３を小型化できる。 The connection conductor 12 is connected to the operation rod 14 via an insulator 13.
When an organic insulating material is used in a vacuum, a problem of gas emission occurs, and therefore an inorganic insulating material such as ceramic is used as the insulator 13. By disposing the insulator 13 in a vacuum, a predetermined insulation performance can be obtained without taking a large creepage distance. For this reason, the insulator 13 can be reduced in size.

また、操作棒１４は、絶縁物で構成する必要がなくなるので、機械的強度の強い材料で構成することができる。操作棒１４は、絶縁筒８を介して真空容器１に支持された端板１５を通して、外部に導出される。操作棒１４と端板１５の間はベローズ１６により結合され、真空容器１内の気密が保持される。操作棒１４は、真空容器１の外部において、操作器１７と接続される。   Further, since the operation rod 14 does not need to be made of an insulator, it can be made of a material having high mechanical strength. The operation rod 14 is led out through the end plate 15 supported by the vacuum vessel 1 via the insulating cylinder 8. The operation rod 14 and the end plate 15 are coupled by a bellows 16 so that the airtightness in the vacuum vessel 1 is maintained. The operating rod 14 is connected to the operating device 17 outside the vacuum vessel 1.

金属製の真空容器１の外周が、絶縁筒８を含めてモールドされ、モールド部１８を構成する。母線側端子９及び負荷側端子１０が導出される部分では、絶縁筒８の全部と端板７と端子９、１０の外周がモールドされ、母線側端子９及び負荷側端子１０の端面が露出される。操作棒１４が導出される部分では、端板１５及びベローズ１６の部分を除いてモールドされる。   The outer periphery of the metal vacuum vessel 1 is molded including the insulating cylinder 8 to form a mold portion 18. In the portion where the bus-side terminal 9 and the load-side terminal 10 are led out, the entire insulating tube 8 and the outer periphery of the end plate 7 and the terminals 9 and 10 are molded, and the end faces of the bus-side terminal 9 and the load-side terminal 10 are exposed. The In the portion where the operation rod 14 is led out, the molding is performed except for the end plate 15 and the bellows 16 portion.

真空遮断器の外周をモールドしたことにより、図２又は特許文献２に記載されたようなガス絶縁開閉装置に適用できるだけでなく、特許文献３に記載されたような固体絶縁スイッチギアのユニットの１つとして適用することも可能となる。したがって、真空遮断器の適用範囲を広げることができる。
なお、真空遮断器を例えばガス絶縁開閉装置内のＳＦ６ガス中に配置するような場合は、このモールドを省略することができる。 Since the outer periphery of the vacuum circuit breaker is molded, it can be applied not only to a gas insulated switchgear as described in FIG. 2 or Patent Document 2, but also to one of the units of a solid insulated switchgear as described in Patent Document 3. It is also possible to apply as one. Therefore, the applicable range of a vacuum circuit breaker can be expanded.
In addition, when a vacuum circuit breaker is arrange | positioned in SF6 gas in a gas insulated switchgear, for example, this mold can be abbreviate | omitted.

図３に示す状態は、真空遮断器の遮断部２が開極している状態を示す。投入信号が操作器１７に入力されると、操作器１７は、操作棒１４を図示上方に移動させる。操作棒１４、絶縁物１３、接続導体１２、２対の可動電極４が一体となって図示上方に移動し、可動電極４が固定電極３に接触をする。これにより、母線側端子９−固定電極３−可動電極４−接続導体１２−可動電極４−固定電極３−負荷側端子１０という電路が形成される。   The state shown in FIG. 3 shows a state where the breaker 2 of the vacuum circuit breaker is open. When the input signal is input to the operation device 17, the operation device 17 moves the operation rod 14 upward in the drawing. The operation rod 14, the insulator 13, the connection conductor 12, and the two pairs of movable electrodes 4 move together in the figure and the movable electrode 4 contacts the fixed electrode 3. As a result, an electric path of bus terminal 9-fixed electrode 3-movable electrode 4-connection conductor 12-movable electrode 4-fixed electrode 3-load side terminal 10 is formed.

真空遮断器の遮断時には、遮断信号が操作器１７に入力され、操作棒１４が図示下方に移動させられる。これにより、２つの可動電極４が固定電極３から同時に開離し、電路が２点において遮断される。
この間、操作棒１４が真空容器１から出入りをするが、操作棒１４と真空容器１容器の間はベローズ１６により封止され、真空容器１の真空が保持される。 When the vacuum circuit breaker is shut off, a shut-off signal is input to the operating device 17 and the operating rod 14 is moved downward in the figure. Thereby, the two movable electrodes 4 are simultaneously separated from the fixed electrode 3, and the electric circuit is interrupted at two points.
During this time, the operating rod 14 enters and exits the vacuum vessel 1, but the space between the operating rod 14 and the vacuum vessel 1 is sealed by the bellows 16, and the vacuum of the vacuum vessel 1 is maintained.

なお、本例のように、真空容器１内に可動電極４と操作棒１４とを絶縁する絶縁物１３を配置することは、特許文献４にも記載されている。しかしながら、特許文献４の真空遮断器は、主回路の遮断部が１点切りであるため、可動電極（５）を可撓導体（１０）で固定電極（７）に接続するという複雑な構造となっている。また、可撓導体（１０）は、可動側電極（５）の開閉動作における大きなストロークを吸収できるものでなければならない。これに対し、本例では、可撓導体を使用しないため、構造の簡単化、長寿命化を達成することができる。   Note that, as in this example, disposing an insulator 13 that insulates the movable electrode 4 and the operation rod 14 in the vacuum vessel 1 is also described in Patent Document 4. However, the vacuum circuit breaker of Patent Document 4 has a complicated structure in which the movable electrode (5) is connected to the fixed electrode (7) by the flexible conductor (10) because the breaker of the main circuit is cut at one point. It has become. The flexible conductor (10) must be able to absorb a large stroke in the opening / closing operation of the movable electrode (5). On the other hand, in this example, since a flexible conductor is not used, the structure can be simplified and the life can be extended.

図４を用いて、本発明の第２の実施例を説明する。以下の説明では、主として実施例１（図３）と異なる点を説明して、重複する説明は省略する。
本例では、２つの可動電極棒１１ごとに絶縁物１３を介して操作棒１４が連結される。２つの可動電極棒１１がフレキシブル導体１９により電気的に接続されることにより、主回路の電路を構成する。 A second embodiment of the present invention will be described with reference to FIG. In the following description, different points from the first embodiment (FIG. 3) will be mainly described, and overlapping description will be omitted.
In this example, the operation rod 14 is connected to the two movable electrode rods 11 via the insulator 13. The two movable electrode rods 11 are electrically connected by the flexible conductor 19 to constitute an electric circuit of the main circuit.

２本の操作棒１４は、それぞれ別個に真空容器３６の外部に導出される。端板１５及びベローズ１６は、操作棒１４ごとに設けられる。２本の操作棒１４は、真空容器１の外部において、接続部材２０により連結され、接続部材２０が操作棒１４により操作器１７と接続される。操作棒１４、接続部材２０は絶縁材料で構成する必要がない。
真空遮断器の投入動作、遮断動作は、実施例１と同様である。主回路の電路は、母線側端子９−固定電極３−可動電極４−フレキシブル導体１９−可動電極４−固定電極３−負荷側端子１０という構成になる。 The two operation rods 14 are led out to the outside of the vacuum vessel 36 separately. The end plate 15 and the bellows 16 are provided for each operation rod 14. The two operating rods 14 are connected by a connecting member 20 outside the vacuum vessel 1, and the connecting member 20 is connected to the operating device 17 by the operating rod 14. The operation rod 14 and the connection member 20 need not be made of an insulating material.
The operation of closing and closing the vacuum circuit breaker is the same as in the first embodiment. The electric circuit of the main circuit has a configuration of bus terminal 9-fixed electrode 3-movable electrode 4-flexible conductor 19-movable electrode 4-fixed electrode 3-load side terminal 10.

本実施例２は、実施例１とほぼ同様な効果を得られるが、以下の相違がある。
実施例２ではベローズ１６を２つ必要とするので、実施例１のほうが、信頼性、コストの面で有利である。
実施例１では、１つの絶縁物１３で接続導体１２と２つの可動電極棒１１を支持しているので、絶縁物１３に軸方向以外の力がかかりやすい。絶縁物１３には、もろいセラミックなどが使用されるので、実施例１の構造では、衝撃により割れが発生する可能性が高くなる。これに対し、実施例２では、１つの絶縁物１３が１つの可動電極棒１１を支持するだけであり、軸方向以外の力が加わりにくいので、割れが発生しにくい。 The second embodiment can obtain substantially the same effect as the first embodiment, but has the following differences.
In the second embodiment, two bellows 16 are required, so the first embodiment is more advantageous in terms of reliability and cost.
In the first embodiment, since the connection conductor 12 and the two movable electrode rods 11 are supported by one insulator 13, a force other than the axial direction is easily applied to the insulator 13. Since a fragile ceramic or the like is used for the insulator 13, the structure of the first embodiment is more likely to crack due to impact. On the other hand, in the second embodiment, one insulator 13 only supports one movable electrode rod 11, and it is difficult to apply a force other than the axial direction, so that cracks are unlikely to occur.

なお、真空容器１内で、フレキシブル導体を使用して電極間を接続することは特許文献４にも記載されている。しかしながら、本例のフレキシブル導体１９と特許文献４における可撓導体（１０）とは、その機能を異にするものである。本例のフレキシブル導体１９は、原理的にはフレキシブルである必要はない。本例でフレキシブルとしているのは、各部品の製造誤差を吸収するためであり、また、開閉動作時の衝撃により各部品間に発生するずれなどを吸収するためのものである。これに対して、特許文献４の遮断器は、可動電極（５）の大きな開閉ストロークを吸収しなければならないものである。   In addition, it is described also in patent document 4 to connect between electrodes using a flexible conductor within the vacuum vessel 1. FIG. However, the flexible conductor 19 of this example and the flexible conductor (10) in Patent Document 4 have different functions. The flexible conductor 19 of this example does not need to be flexible in principle. In this example, the reason for flexibility is to absorb manufacturing errors of each component, and also to absorb a shift generated between components due to an impact during an opening / closing operation. On the other hand, the circuit breaker of Patent Document 4 must absorb a large opening / closing stroke of the movable electrode (5).

図５を用いて、本願発明の第３の実施例を説明する。
本例は、上記実施例１、実施例２の２点切り真空遮断器に、接地開閉器を組み合せたものである。本例は、実施例１及び実施例２のいずれにも適用可能であるが、以下の説明では、実施例２（図４）に本例を適用したものについて説明する。この説明では、図４と異なる点を説明して、重複する説明は省略する。 A third embodiment of the present invention will be described with reference to FIG.
In this example, a ground switch is combined with the two-point vacuum circuit breaker of Example 1 and Example 2 above. Although this example is applicable to both Example 1 and Example 2, in the following description, what applied this example to Example 2 (FIG. 4) is demonstrated. In this description, points different from FIG. 4 will be described, and redundant description will be omitted.

２対の遮断部２の内、負荷側端子１０側に近接して接地開閉部２１が配置される。接地開閉部２１の固定電極２２は、接続導体２３により負荷側端子１０側の固定電極棒６に接続される。固定電極２２の背面側は、絶縁スペーサ２４を介して真空容器１に支持される。可動電極２５を支持する可動電極棒２６は、絶縁物を介することなく直接、端板１５を通して外部に導出される。可動電極棒２６の導出部にベローズ１６が設けられる点は、真空遮断器の操作棒１４と同様である。   A ground opening / closing part 21 is disposed in the vicinity of the load side terminal 10 side of the two pairs of blocking parts 2. The fixed electrode 22 of the ground opening / closing part 21 is connected to the fixed electrode bar 6 on the load side terminal 10 side by a connecting conductor 23. The back side of the fixed electrode 22 is supported by the vacuum vessel 1 through an insulating spacer 24. The movable electrode rod 26 that supports the movable electrode 25 is directly led out through the end plate 15 without an insulator. The point that the bellows 16 is provided at the lead-out portion of the movable electrode rod 26 is the same as the operation rod 14 of the vacuum circuit breaker.

可動電極棒２６は、真空容器１の外部で操作器２７に連結される。可動電極棒２６は、接地開閉部の使用時には適宜手段により接地される。
保守点検などのために接地開閉部２１により主回路を接地するときは、主回路の遮断部２が開状態にあることを条件として、操作器２７の操作により接地開閉部２１を閉とする。これにより、負荷側端子１０側の電路が接地される。 The movable electrode rod 26 is connected to the operating device 27 outside the vacuum vessel 1. The movable electrode rod 26 is grounded by appropriate means when the ground opening / closing part is used.
When the main circuit is grounded by the ground opening / closing part 21 for maintenance inspection or the like, the ground opening / closing part 21 is closed by the operation of the operating device 27 on the condition that the interruption part 2 of the main circuit is in an open state. Thereby, the electric circuit by the side of the load side terminal 10 is grounded.

従来の第１のタイプの真空遮断器の構造を断面で示す図である。It is a figure which shows the structure of the conventional 1st type vacuum circuit breaker in a cross section. 従来の第２のタイプの真空遮断器の構造を断面で示す図である。It is a figure which shows the structure of the conventional 2nd type vacuum circuit breaker in a cross section. 本発明の第１の実施例を断面で示す図である。It is a figure which shows the 1st Example of this invention in a cross section. 本発明の第２の実施例を断面で示す図である。It is a figure which shows the 2nd Example of this invention in a cross section. 本発明の第３の実施例を断面で示す図である。It is a figure which shows the 3rd Example of this invention in a cross section.

符号の説明Explanation of symbols

１…真空容器
２…遮断部
３…固定電極
４…可動電極
５…アークシールド
６…固定電極棒
７…端板
８…絶縁筒
９…母線側端子
１０…負荷側端子
１１…可動電極棒
１２…接続導体
１３…絶縁物
１４…操作棒
１５…端板
１６…ベローズ
１７…操作器
１８…モールド部
１９…フレキシブル導体
２０…接続部材
２１…接地開閉部
２２…固定電極
２３…接続導体
２４…絶縁スペーサ
２５…可動電極
２６…可動電極棒
２７…操作器
３１、３２…真空バルブ
３３…絶縁容器
３４…接続導体
３５…リンク部
３６…絶縁操作棒
３７…気密容器
３８…接続導体
３９…連結部
４０…操作器 DESCRIPTION OF SYMBOLS 1 ... Vacuum container 2 ... Blocking part 3 ... Fixed electrode 4 ... Movable electrode 5 ... Arc shield 6 ... Fixed electrode rod 7 ... End plate 8 ... Insulating cylinder 9 ... Bus-side terminal 10 ... Load side terminal 11 ... Movable electrode rod 12 ... Connection conductor 13 ... Insulator 14 ... Operation rod 15 ... End plate 16 ... Bellows 17 ... Controller 18 ... Mold part 19 ... Flexible conductor 20 ... Connection member 21 ... Ground switching part 22 ... Fixed electrode 23 ... Connection conductor 24 ... Insulation spacer 25 ... Moving electrode 26 ... Moving electrode rod 27 ... Operator 31, 32 ... Vacuum valve 33 ... Insulating vessel 34 ... Connecting conductor 35 ... Linking portion 36 ... Insulating operating rod 37 ... Airtight vessel 38 ... Connecting conductor 39 ... Connecting portion 40 ... Controller

Claims (3)

直列接続された２対の遮断部を同時に開極して電流を遮断する２点切り真空遮断器であって、
金属製の真空容器と、
それぞれが可動電極と固定電極とからなり、前記真空容器内に平行に配置された２対の遮断部と、
前記固定電極を、絶縁筒を介して前記真空容器に支持する支持部と、
前記真空容器の内部で前記２つの可動電極を接続する接続導体と、
前記真空容器の内部で絶縁物を介して前記接続導体と連結され、前記真空容器外部に導出される操作棒と、
絶縁筒を介して前記真空容器に取り付けられ、前記操作棒と前記真空容器との間の気密を維持する封止手段と、
を具備することを特徴とする真空遮断器。 A two-point vacuum circuit breaker that simultaneously opens two pairs of breakers connected in series and cuts off current.
A metal vacuum vessel,
Each consisting of a movable electrode and a fixed electrode, and two pairs of blocking portions arranged in parallel in the vacuum vessel;
A support for supporting the fixed electrode on the vacuum vessel via an insulating cylinder;
A connection conductor connecting the two movable electrodes inside the vacuum vessel;
An operation rod connected to the connection conductor through an insulator inside the vacuum vessel and led out of the vacuum vessel;
A sealing means that is attached to the vacuum vessel via an insulating cylinder and maintains the airtightness between the operation rod and the vacuum vessel;
A vacuum circuit breaker comprising: 直列接続された２対の遮断部を同時に開極して電流を遮断する２点切り真空遮断器であって、
金属製の真空容器と、
それぞれが可動電極と固定電極とからなり、前記真空容器内に平行に配置された２対の遮断部と、
前記固定電極を、絶縁筒を介して前記真空容器に支持する支持部と、
前記２つの可動電極を接続するフレキシブル導体と、
前記真空容器の内部で絶縁物を介して前記２つの可動電極とそれぞれ連結され、絶縁筒を介して前記真空容器外部に導出される２本の操作棒と、
絶縁筒を介して前記真空容器に取り付けられ、前記操作棒と前記真空容器との間の気密を維持する封止手段と、
前記真空容器の外部で前記２本の操作棒を連結する連結部と、
を具備することを特徴とする真空遮断器。 A two-point vacuum circuit breaker that simultaneously opens two pairs of breakers connected in series and cuts off current.
A metal vacuum vessel,
Each consisting of a movable electrode and a fixed electrode, and two pairs of blocking portions arranged in parallel in the vacuum vessel;
A support for supporting the fixed electrode on the vacuum vessel via an insulating cylinder;
A flexible conductor connecting the two movable electrodes;
Two operating rods that are respectively connected to the two movable electrodes via an insulator inside the vacuum vessel and led out of the vacuum vessel via an insulating cylinder;
A sealing means that is attached to the vacuum vessel via an insulating cylinder and maintains the airtightness between the operation rod and the vacuum vessel;
A connecting portion for connecting the two operation rods outside the vacuum vessel;
A vacuum circuit breaker comprising: 前記真空容器内に接地開閉器を配置し、この接地開閉器は、前記遮断部の一方の固定電極と接続された固定電極と、可動電極と、この可動電極を支持し前記真空容器外部に導出される可動電極棒と、この可動電極棒と前記真空容器との間の気密を維持する封止手段とを具備すること、
を特徴とする請求項１又は２に記載の真空遮断器。 A grounding switch is disposed in the vacuum container, and the grounding switch supports the movable electrode and the fixed electrode connected to one fixed electrode of the interrupting portion, and supports the movable electrode and leads out of the vacuum container. A movable electrode rod, and sealing means for maintaining airtightness between the movable electrode rod and the vacuum vessel,
The vacuum circuit breaker according to claim 1 or 2.
JP2003343421A 2003-10-01 2003-10-01 Double-break vacuum circuit breaker Pending JP2005108766A (en)

Priority Applications (1)

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