JP2015008152A - Vacuum circuit breaker - Google Patents

Vacuum circuit breaker Download PDF

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JP2015008152A
JP2015008152A JP2014182933A JP2014182933A JP2015008152A JP 2015008152 A JP2015008152 A JP 2015008152A JP 2014182933 A JP2014182933 A JP 2014182933A JP 2014182933 A JP2014182933 A JP 2014182933A JP 2015008152 A JP2015008152 A JP 2015008152A
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circuit breaker
vacuum
main body
main
vacuum circuit
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JP5837163B2 (en
Inventor
稲葉　繁
Shigeru Inaba
繁 稲葉
圭二 後藤
Keiji Goto
圭二 後藤
丈明 山中
Takeaki Yamanaka
丈明 山中
洋 十鳥
Hiroshi Totori
洋 十鳥
敬太 山本
Keita Yamamoto
敬太 山本
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/26—Arrangements of fuses, resistors, voltage arresters or the like
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Manufacturing & Machinery (AREA)
  • Trip Switchboards (AREA)
  • Patch Boards (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker allowing a surge suppressor, such as a CR suppressor, to be easily installed.SOLUTION: A vacuum circuit breaker includes: a vacuum valve 2; a body frame 3 for accommodating the vacuum valve 2; a pair of main circuit terminals 4 and 5 electrically connected to upper and lower side contacts of the vacuum valve 2 to be led to the rear side of the body frame 3; a truck frame 7; surge absorbers 12 each of which is arranged in the lower part of the lower side main circuit terminal 5 in the rear side of the body frame 3, and has a connection terminal 12c connected to the lower side main circuit terminal 5; and a body case 12a in which the surge absorbers for the number of phases of the vacuum circuit breaker are arranged horizontally and are arranged in parallel in a direction orthogonal to the lead-out direction of the main circuit terminals, and which collectively supports the surge absorbers 12. The connection terminal 12c of each of the surge absorbers 12 is electrically connected to the lower side main circuit terminal 5.

Description

この発明は、真空遮断器に関し、特に主回路部に付属機器が接続される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 in which an accessory is connected to a main circuit portion.

電力系統に使用される遮断器としては、従来からガス遮断器がよく知られている。このガス遮断器に使用される絶縁性ガスは、例えば、ＳＦ６ガスである。ＳＦ６ガスは、絶縁耐力が高く、不活性であり、熱伝導性も高い等の優れた絶縁特性を有する反面、地球温暖化係数が非常に高いという問題点を抱えている。このため、ＳＦ６ガスの使用を規制する動きが強まり、ＳＦ６ガスを使用したガス遮断器に替えて、ＳＦ６ガスを使わない真空遮断器に置き換える方向にある。この場合、遮断器が収容された盤全体を置き換えることは費用負担が大きく、また工期も長くかかるため、既設の盤に収容されたガス遮断器の部分のみを真空遮断器に置き換えるような技術も提案されている。   Conventionally, a gas circuit breaker is well known as a circuit breaker used in an electric power system. The insulating gas used for this gas circuit breaker is, for example, SF6 gas. SF6 gas has excellent dielectric properties such as high dielectric strength, inertness, and high thermal conductivity, but has a problem of a very high global warming potential. For this reason, the movement which regulates use of SF6 gas is strengthened, and it is in the direction of replacing with the gas circuit breaker which uses SF6 gas with the vacuum circuit breaker which does not use SF6 gas. In this case, it is expensive to replace the entire board in which the circuit breaker is housed, and it takes a long period of time. Therefore, there is a technology that replaces only the part of the gas circuit breaker housed in the existing board with a vacuum circuit breaker. Proposed.

既設の遮断器を真空遮断器に置き替える技術として、例えば、図５のような遮断器が開示されている。（例えば、特許文献１参照）
この特許文献１に示された技術は、磁気遮断器から真空遮断器に更新する例であるが、図５に示すように磁気遮断器および既設配電盤の仕様に適合する真空遮断器２１を選択し、盤内に真空遮断器２１の固定枠２２を設置して真空遮断器２１を載置するものである。また、適宜、バリヤ２３等を追加し、更にサージアブソーバとして、遮断器室の後方のフィーダ室にＣＲサプレッサ２４を設置している。ここで、真空遮断器２１の主回路端子の一端側は、既設の母線２５に接続され、他端側は、接続導体を介して既設の負荷側のケーブル２６に接続される。
このような真空遮断器２１は、真空中で電流を高速で遮断するため、非常に優れた遮断性能を有するが、開閉時にサージ電圧が発生し、負荷によってはＣＲサプレッサ２４のようなサージアブソーバが必要となり、真空遮断器２１への置き換え時に追加設置されることになる。 For example, a circuit breaker as shown in FIG. 5 is disclosed as a technique for replacing an existing circuit breaker with a vacuum circuit breaker. (For example, see Patent Document 1)
The technique disclosed in Patent Document 1 is an example of updating from a magnetic circuit breaker to a vacuum circuit breaker. However, as shown in FIG. 5, a vacuum circuit breaker 21 that matches the specifications of the magnetic circuit breaker and the existing switchboard is selected. The fixed frame 22 of the vacuum circuit breaker 21 is installed in the panel and the vacuum circuit breaker 21 is placed. Further, a barrier 23 or the like is added as appropriate, and a CR suppressor 24 is installed as a surge absorber in the feeder chamber behind the circuit breaker chamber. Here, one end side of the main circuit terminal of the vacuum circuit breaker 21 is connected to the existing bus bar 25, and the other end side is connected to the existing load-side cable 26 via the connection conductor.
Such a vacuum circuit breaker 21 has a very good breaking performance because it cuts off the current at high speed in a vacuum. However, a surge voltage is generated at the time of opening and closing, and depending on the load, a surge absorber such as a CR suppressor 24 may be used. It is necessary and will be additionally installed when the vacuum circuit breaker 21 is replaced.

特開２００５−２６９７７１号公報（第３−４頁、図３）Japanese Patent Laying-Open No. 2005-267971 (page 3-4, FIG. 3)

特許文献１に示すような遮断器の更新作業においては、ＣＲサプレッサを配電盤内の遮断器室の奥に配置し、ケーブルや導体で接続することになるため、ＣＲサプレッサを配電盤内へ設置する際、さまざまな部品を外す必要があり、また、狭い場所のために、場合によってはＣＲサプレッサを作業員が担いで移動させるようなことも必要となる。さらに、奥まったところでの接続作業となり、配置や接続の作業性が悪く、長い作業時間を要するという問題点があった。   In the update operation of the circuit breaker as shown in Patent Document 1, the CR suppressor is placed in the back of the circuit breaker room in the switchboard and is connected by a cable or a conductor. Therefore, when installing the CR suppressor in the switchboard It is necessary to remove various parts, and it is also necessary to move the CR suppressor by an operator in some cases due to the small space. Furthermore, there is a problem in that the connection work is performed in the back, the workability of arrangement and connection is poor, and a long work time is required.

この発明は、上記のような問題を解決するためになされたもので、ＣＲサプレッサ等のサージアブソーバの設置及び組立が容易な真空遮断器を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to provide a vacuum circuit breaker in which a surge absorber such as a CR suppressor can be easily installed and assembled.

この発明に係る真空遮断器は、固定接点および可動接点を有する真空バルブと、前記真空バルブの軸線を上下に向けて前記真空バルブを収容する本体フレームと、前記真空バルブの上部側及び下部側接点に電気的に接続され、前記本体フレームの後方に導出された上部側及び下部側の主回路端子と、前記本体フレームが搭載され、前後方向に移動可能な台車フレームと、前記本体フレームの後方で前記下部側の主回路端子の下方に配置され、上部に前記下部側の主回路端子に接続される接続端子を有するサージアブソーバと、真空遮断器の相数分の前記サージアブソーバを水平に並べ、かつ、前記主回路端子の導出方向に対して直交する方向に並置し、前記サージアブソーバを一括して支持する本体ケースと、を備え、前記サージアブソーバの前記接続端子と前記下部側の主回路端子とを電気的に接続するように構成したものである。   The vacuum circuit breaker according to the present invention includes a vacuum valve having a fixed contact and a movable contact, a main body frame that accommodates the vacuum valve with the axis of the vacuum valve facing up and down, and upper and lower contacts of the vacuum valve. An upper side and a lower side main circuit terminal that are electrically connected to the main body frame, a carriage frame on which the main body frame is mounted and movable in the front-rear direction, and at the rear of the main body frame A surge absorber disposed below the main circuit terminal on the lower side and having a connection terminal connected to the main circuit terminal on the lower side, and the surge absorber for the number of phases of the vacuum circuit breaker are arranged horizontally, And a body case that is juxtaposed in a direction orthogonal to the direction in which the main circuit terminals are led out and collectively supports the surge absorber, the surge absorber It is obtained by configured to electrically connect the main circuit terminal of the lower side to the connection terminal.

この発明の真空遮断器によれば、軸線を上下に向けて真空バルブが収容された本体フレームの後方にサージアブソーバが配置され、サージアブソーバの接続端子と真空バルブの下部側の主回路端子に設けた接触子とを電気的に接続するように構成したため、サージアブソーバを容易に真空遮断器の主回路部に接続して設置することができる。このため、例えば、既設のガス遮断器を真空遮断器に置き換えるような作業において、サージアブソーバを新たに付設するような場合に、作業性が向上し、作業時間とコストを低減することができる。   According to the vacuum circuit breaker of the present invention, the surge absorber is disposed behind the main body frame in which the vacuum valve is accommodated with the axis line directed up and down, and is provided on the connection terminal of the surge absorber and the main circuit terminal on the lower side of the vacuum valve. Therefore, the surge absorber can be easily connected to the main circuit portion of the vacuum circuit breaker. For this reason, for example, in the operation of replacing an existing gas circuit breaker with a vacuum circuit breaker, when a surge absorber is newly installed, workability is improved, and work time and cost can be reduced.

この発明の実施の形態１に係る真空遮断器の要部を示す側面図である。It is a side view which shows the principal part of the vacuum circuit breaker concerning Embodiment 1 of this invention. 図１における真空遮断器の背面から見た背面図である。It is the rear view seen from the back surface of the vacuum circuit breaker in FIG. 図１におけるＡ−Ａ線から見た部分平面図である。It is the fragmentary top view seen from the AA line in FIG. この本発明の実施の形態２に係る真空遮断器の要部を示す側面図である。It is a side view which shows the principal part of the vacuum circuit breaker concerning Embodiment 2 of this invention. 従来の真空遮断器の更新例を説明するための側面図である。It is a side view for demonstrating the update example of the conventional vacuum circuit breaker.

実施の形態１．
図１は、実施の形態１に係る真空遮断器の要部を示す側面図であり、図２はその背面図、図３は図１におけるＡ−Ａ線から見た部分平面図である。
なお、図１において、左側が真空遮断器１の前面側となるため、以下の説明では、背面、前方、後方、前後方向等の文言は、この前面側を基準にするものとする。 Embodiment 1 FIG.
1 is a side view showing a main part of a vacuum circuit breaker according to Embodiment 1, FIG. 2 is a rear view thereof, and FIG. 3 is a partial plan view seen from the line AA in FIG.
In FIG. 1, since the left side is the front side of the vacuum circuit breaker 1, in the following description, the terms such as the back side, the front side, the rear side, and the front-back direction are based on the front side.

図において、真空遮断器１の遮断部を構成する真空バルブ２は、円筒状をした真空容器の内部に固定接点と可動接点（いずれも図示せず）が接離可能に配置され、本体フレーム３に収容されている。また、真空バルブ２の上部側から、固定接点に電気的につながる固定側主回路端子４が真空バルブ２の軸線と直交して背面側に引き出され、下部側から可動接点に電気的につながる可動側主回路端子５が固定側と同方向に引き出されている。
これら固定側主回路端子４及び可動側主回路端子５の各先端側には、主回路接触子６が設けられている。この主回路接触子６は、例えば、円周方向に多数の接触子片が配列され、その外周に設けられたばねによって接触子片が中心方向に付勢されるように構成されている。 In the figure, a vacuum valve 2 constituting a shut-off portion of the vacuum circuit breaker 1 is arranged in a cylindrical vacuum vessel so that a fixed contact and a movable contact (both not shown) can be contacted and separated, and a body frame 3 Is housed in. Further, the fixed main circuit terminal 4 electrically connected to the fixed contact is drawn from the upper side of the vacuum valve 2 to the back side perpendicular to the axis of the vacuum valve 2 and is electrically connected to the movable contact from the lower side. The side main circuit terminal 5 is drawn out in the same direction as the fixed side.
A main circuit contact 6 is provided on each distal end side of the fixed side main circuit terminal 4 and the movable side main circuit terminal 5. The main circuit contact 6 is configured such that, for example, a large number of contact pieces are arranged in the circumferential direction, and the contact pieces are biased in the center direction by a spring provided on the outer periphery thereof.

また、本体フレーム３は、車輪７ａを備えた台車フレーム７に搭載され、前後方向に移動可能なように構成されている。さらに、本体フレーム３の前面側には、フェースプレート８が設けられ、フェースプレート８のすぐ背面側には、真空バルブ２の操作機構（図示せず）が収容されている。
真空バルブ２の可動接点から下方に引き出された可動電極棒２ａは、絶縁ロッド９及びリンク機構（図示せず）を介して操作機構に連結され、操作機構の動作により、真空バルブ２の可動接点が駆動され、固定接点に接離することにより、真空バルブ２の開閉が行われることになる。 The main body frame 3 is mounted on a carriage frame 7 having wheels 7a and is configured to be movable in the front-rear direction. Further, a face plate 8 is provided on the front side of the main body frame 3, and an operating mechanism (not shown) for the vacuum valve 2 is accommodated on the back side of the face plate 8.
The movable electrode rod 2a drawn downward from the movable contact of the vacuum valve 2 is connected to the operation mechanism via an insulating rod 9 and a link mechanism (not shown), and the movable contact of the vacuum valve 2 is operated by the operation of the operation mechanism. Is driven, and the vacuum valve 2 is opened and closed by contacting and leaving the fixed contact.

真空遮断器１は、通常、スイッチギヤ等の盤の筐体の遮断器室内に収容されて、他の機器と組み合わされて使用される。図１に一点鎖線で示した部分は、その遮断器室１０を示している。遮断器室１０の床面には、台車フレーム７の車輪７ａをガイドするレール（図示せず）が設けられており、さらに遮断器室１０の後壁には、断路部１１が設けられている。断路部１１の中心導体に、真空バルブ２側の固定側主回路端子４及び可動側主回路端子５の各主回路接触子６が嵌合する。また、上下の断路部１１の後方側は、例えば、図５と同様に一方が主回路母線に接続され、他方が負荷側のケーブルに接続される。
このような構成のもとで、真空遮断器１のフェースプレート８に設けた取手を引いて前方に引き出すことで、主回路接触子６と断路部１１との接続が断たれ、断路状態となる。 The vacuum circuit breaker 1 is usually accommodated in a circuit breaker chamber of a casing of a panel such as a switch gear and used in combination with other devices. The part shown with the dashed-dotted line in FIG. 1 has shown the circuit breaker chamber 10. FIG. Rails (not shown) for guiding the wheels 7a of the bogie frame 7 are provided on the floor surface of the circuit breaker chamber 10, and a disconnecting portion 11 is provided on the rear wall of the circuit breaker chamber 10. . The main circuit contacts 6 of the fixed-side main circuit terminal 4 and the movable-side main circuit terminal 5 on the vacuum valve 2 side are fitted into the central conductor of the disconnection portion 11. Further, for example, one of the rear sides of the upper and lower disconnecting portions 11 is connected to the main circuit bus in the same manner as in FIG. 5, and the other is connected to the load-side cable.
Under such a configuration, by pulling the handle provided on the face plate 8 of the vacuum circuit breaker 1 and pulling it forward, the connection between the main circuit contact 6 and the disconnecting portion 11 is disconnected, and a disconnected state is established. .

ここで、本体フレーム３の後方の台車フレーム７上には、付属機器であるＣＲサプレッサ１２が載置されて固定されている。なお、ＣＲサプレッサ１２の本体ケース１２ａ内の図示は省略している。
図３に示すように、台車フレーム７への固定側は、ＣＲサプレッサ１２の本体ケース１２ａの左右に、台車フレーム７の後部左右の上面に載置して係合可能な取付フランジ１２ｂを設け、取付フランジ１２ｂの取付穴部を台車フレーム７側のねじ穴に合わせてボルトにより締結する。取付穴は、取付部の公差を考慮して調整可能なように、左右方向に長い長穴とするか、あるいは図３に示すように外側を切り欠いた形状としている。 Here, a CR suppressor 12 which is an accessory device is placed and fixed on the carriage frame 7 behind the main body frame 3. In addition, illustration in the main body case 12a of CR suppressor 12 is abbreviate | omitted.
As shown in FIG. 3, the fixed side to the carriage frame 7 is provided with mounting flanges 12b that can be placed on and engaged with the upper left and right upper surfaces of the carriage frame 7 on the left and right sides of the body case 12a of the CR suppressor 12, The mounting hole portion of the mounting flange 12b is aligned with the screw hole on the cart frame 7 side and fastened with a bolt. The mounting hole is a long hole in the left-right direction so that it can be adjusted in consideration of the tolerance of the mounting part, or has a shape with a notch on the outside as shown in FIG.

一方、真空遮断器１の可動側主回路端子５の各相の、ＣＲサプレッサ１２と対向する側に接続導体１３を設け、その先端側に真空遮断器１の後方に向けて、間隔を開けて設けた一対の接触子１４を固着している。一対の接触子１４は、例えば、図示しないばね部材等を設けて間隔が狭まる方向に付勢している。
ＣＲサプレッサ１２の本体ケース１２ａの上面には、主回路側に接続される３相の接続端子１２ｃが突設されている。接続端子１２ｃは、本体ケース１２ａを台車フレーム７に固定する所定位置で接触子１４に嵌合し、所定の接触圧で接続されるようになっている。
また、ＣＲサプレッサ１２の本体ケース１２ａには接地端子１２ｄが設けられており、組立後、接地線１５で遮断器室１０側に接地される。
なお、接触子１４と接続端子１２ｃの形状は図に限定するものではなく、接続導体１３側に設ける接触子を例えば棒状にし、ＣＲサプレッサ１２の接続端子を、その棒状の接触子にスライドして嵌合可能な形状、すなわち、図と逆の関係にしても良い。 On the other hand, a connecting conductor 13 is provided on the side of the movable main circuit terminal 5 of the vacuum circuit breaker 1 on the side facing the CR suppressor 12, and the distal end of the connection conductor 13 faces the rear of the vacuum circuit breaker 1 with a gap. A pair of provided contacts 14 are fixed. The pair of contacts 14 is provided with a spring member (not shown) or the like, for example, and is biased in a direction in which the interval is reduced.
On the upper surface of the main body case 12a of the CR suppressor 12, a three-phase connection terminal 12c connected to the main circuit side is projected. The connection terminal 12c is fitted to the contact 14 at a predetermined position for fixing the main body case 12a to the carriage frame 7, and is connected with a predetermined contact pressure.
The main body case 12a of the CR suppressor 12 is provided with a ground terminal 12d, and is grounded to the circuit breaker chamber 10 side by a ground wire 15 after assembly.
Note that the shapes of the contact 14 and the connection terminal 12c are not limited to the drawings, and the contact provided on the connection conductor 13 side is, for example, a rod shape, and the connection terminal of the CR suppressor 12 is slid onto the rod-shaped contact. A shape that can be fitted, that is, a relationship opposite to that in the figure may be used.

次に、上記のように構成された真空遮断器１の作用について説明する。
ガス遮断器が組み込まれたスイッチギヤ等において、そのガス遮断器の部分のみ真空遮断器に置き換えるような場合、真空遮断器１では高いサージ電圧が発生するので、そのサージ抑制のためにサージアブソーバとしてＣＲサプレッサ１２を設ける必要が生じる場合がある。
ＣＲサプレッサ１２は、コンデンサ（Ｃ）と抵抗（Ｒ）の直列回路が本体ケース１２ａに収容され、内部に絶縁油が封入されている。このため、容量にもよるが、例えば、重量は３０ｋｇ程度にもなるものもあり、取り扱いが容易ではない。すなわち、図５のように、遮断器室の後方のフィーダ室に設置するのは容易ではなく、非常に作業性が悪く困難が伴う。 Next, the operation of the vacuum circuit breaker 1 configured as described above will be described.
In a switchgear with a built-in gas circuit breaker, when only the gas circuit breaker is replaced with a vacuum circuit breaker, a high surge voltage is generated in the vacuum circuit breaker 1, so as a surge absorber for suppressing the surge. It may be necessary to provide a CR suppressor 12.
In the CR suppressor 12, a series circuit of a capacitor (C) and a resistor (R) is accommodated in a main body case 12a, and insulating oil is sealed inside. For this reason, although depending on the capacity, for example, there are some that weigh as much as 30 kg, and handling is not easy. That is, as shown in FIG. 5, it is not easy to install in the feeder chamber behind the circuit breaker chamber, and the workability is very poor and difficult.

これに対し、本実施の形態１の構成によれば、真空遮断器１を遮断器室１０に組み込む前に、上下の主回路端子４，５が組み付けられた状態で、背面側からＣＲサプレッサ１２の取付フランジ１２ｂの一端を台車フレーム７の後端上部に乗せて、所定の位置までスライドさせて押し込み移動させることによって、接続端子１２ｃを接触子１４に嵌合させて接続できるため、その位置で取付フランジ１２ｂをボルトにより台車フレーム７に固定すれば、容易に組立が完了する。この組立状態で、盤側の遮断器室１０に載置し、後方の接続位置まで移動させて断路部１１に接続すれば、真空遮断器１の置き換えを完了することができる。
また、リプレース等の場合には、上記と逆の手順で、容易にＣＲサプレッサ１２を真空遮断器１の本体部から切離し及び取外しを行うことができる。 On the other hand, according to the configuration of the first embodiment, before the vacuum circuit breaker 1 is assembled in the circuit breaker chamber 10, the CR suppressor 12 is installed from the back side with the upper and lower main circuit terminals 4 and 5 assembled. Since one end of the mounting flange 12b is placed on the upper rear end of the carriage frame 7 and is slid to a predetermined position and moved by pushing, the connection terminal 12c can be fitted to the contact 14 and connected. If the mounting flange 12b is fixed to the carriage frame 7 with bolts, the assembly is easily completed. In this assembled state, the vacuum circuit breaker 1 can be replaced by placing it in the circuit breaker chamber 10 on the panel side, moving it to the rear connection position, and connecting it to the disconnecting portion 11.
Further, in the case of replacement or the like, the CR suppressor 12 can be easily separated from the main body of the vacuum circuit breaker 1 and removed by a procedure reverse to the above.

なお、以上の説明では、遮断器本体の主回路部と接続される付属機器をＣＲサプレッサ１２としたが、付属機器はこれに限定するものではなく、ＣＲサプレッサ以外のサージアブソーバでも良く、また、計器用変圧器（ＶＴ）であっても同様の作用効果を得ることができる。
さらに、上記のような構成は、ガス遮断器を真空遮断器に更新するような場合に限定するものではなく、新規の真空遮断器にも適用できる。 In the above description, the accessory device connected to the main circuit portion of the circuit breaker main body is the CR suppressor 12, but the accessory device is not limited to this, and a surge absorber other than the CR suppressor may be used. Similar effects can be obtained even with an instrument transformer (VT).
Furthermore, the configuration as described above is not limited to the case where the gas circuit breaker is replaced with a vacuum circuit breaker, and can also be applied to a new vacuum circuit breaker.

以上のように、実施の形態１の真空遮断器によれば、固定接点および可動接点を有する真空バルブと、前記真空バルブの軸線を上下に向けて前記真空バルブを収容する本体フレームと、前記真空バルブの上部側及び下部側接点に電気的に接続され、前記本体フレームの後方に導出された上部側及び下部側の主回路端子と、前記本体フレームが搭載され、前後方向に移動可能な台車フレームと、前記本体フレームの後方で前記下部側の主回路端子の下方に配置され、上部に前記下部側の主回路端子に接続される接続端子を有するサージアブソーバと、真空遮断器の相数分の前記サージアブソーバを水平に並べ、かつ、前記主回路端子の導出方向に対して直交する方向に並置し、前記サージアブソーバを一括して支持する本体ケースと、を備え、前記サージアブソーバの前記接続端子と前記下部側の主回路端子とを電気的に接続するように構成したので、サージアブソーバを容易に真空遮断器の主回路部に接続して設置することができる。このため、例えば、既設のガス遮断器を真空遮断器に置き換えるような作業において、サージアブソーバを新たに付設するような場合に、作業性が向上し、作業時間とコストを低減させることができる。   As described above, according to the vacuum circuit breaker of the first embodiment, the vacuum valve having the fixed contact and the movable contact, the main body frame that accommodates the vacuum valve with the axis of the vacuum valve facing up and down, and the vacuum The upper and lower main circuit terminals that are electrically connected to the upper and lower contacts of the valve and led to the rear of the main body frame, and the bogie frame on which the main body frame is mounted and movable in the front-rear direction And a surge absorber disposed below the main circuit terminal on the lower side behind the main body frame and having a connection terminal connected to the main circuit terminal on the lower side, and the number of phases of the vacuum circuit breaker The surge absorber is arranged horizontally, and juxtaposed in a direction perpendicular to the direction in which the main circuit terminals are led out, and a body case that collectively supports the surge absorber, and Since the connection terminals of the serial surge absorber with a main circuit terminal of the lower side is configured to be electrically connected, may be installed by connecting to a main circuit portion of the easily vacuum breaker surge absorber. For this reason, for example, in the operation of replacing an existing gas circuit breaker with a vacuum circuit breaker, when a surge absorber is newly installed, workability is improved, and work time and cost can be reduced.

また、サージアブソーバは、本体フレームの後方で、台車フレームに載置されて固定されるようにしたので、真空遮断器をスイッチギヤ等の盤の遮断器室に組み込む前にサージアブソーバを遮断器本体と一体に組み合わせることができ、作業性を向上させることができる。   In addition, the surge absorber is mounted and fixed on the bogie frame at the rear of the body frame, so the surge absorber must be installed before the vacuum circuit breaker is installed in the circuit breaker chamber of the switchgear or other panel. And can be combined integrally, and workability can be improved.

実施の形態２．
図４は、実施の形態２に係る真空遮断器の要部構成を示す側面図で、図１と同等部分は同一符号を付して説明は省略する。相違点は、付属機器であるＣＲサプレッサの組み付け構造である。 Embodiment 2. FIG.
FIG. 4 is a side view showing the configuration of the main part of the vacuum circuit breaker according to Embodiment 2, and the same parts as those in FIG. The difference is the assembly structure of the CR suppressor which is an accessory device.

図４において、ＣＲサプレッサ１２は、台車フレーム７に取り付けるのではなく、台車フレーム７の間の遮断器室１０の床面に載置し、本体ケース１２ａを遮断器室１０に直接固定するものである。
すなわち、真空バルブ２を組み込んだ本体フレーム３を台車フレーム７に載置し、固定側主回路端子４及び可動側主回路端子５の各主回路接触子６が断路部１１に嵌合する接続位置にあって、ＣＲサプレッサ１２の棒状の接続端子１２ｃが接続導体１３に固着した接触子１４に嵌合する位置になるように、予めＣＲサプレッサ１２の遮断器室１０の床面への取り付け位置を決めておく。
このように構成することにより、台車フレーム７を取り付ける前に、ＣＲサプレッサ１２を遮断器室１０の床面に取り付け、さらに接地線１５で遮断器室１０側に接地することができる。その後、台車フレーム７を遮断器室１０のレールに乗せて接続位置まで押し込むことによって装置全体を構成することが可能である。
このようにＣＲサプレッサ１２を遮断器室１０の床面に取り付けるとともに接地線１５を遮断器室１０側へ接地する作業は、本体フレーム３を載置した台車フレーム７を配置する前の状態で行うことができるため、作業性よく行わせることができる。 In FIG. 4, the CR suppressor 12 is not attached to the bogie frame 7 but is placed on the floor surface of the circuit breaker chamber 10 between the bogie frames 7 to directly fix the main body case 12 a to the circuit breaker chamber 10. is there.
That is, the main body frame 3 incorporating the vacuum valve 2 is placed on the carriage frame 7, and the connection positions where the main circuit contacts 6 of the fixed main circuit terminal 4 and the movable main circuit terminal 5 are fitted to the disconnection portion 11. Then, the mounting position of the CR suppressor 12 on the floor surface of the circuit breaker chamber 10 is previously set so that the rod-shaped connection terminal 12c of the CR suppressor 12 is fitted to the contact 14 fixed to the connection conductor 13. Decide it.
With this configuration, the CR suppressor 12 can be attached to the floor surface of the circuit breaker chamber 10 and grounded to the circuit breaker chamber 10 side by the grounding wire 15 before the carriage frame 7 is attached. Thereafter, the entire apparatus can be configured by placing the carriage frame 7 on the rail of the circuit breaker chamber 10 and pushing it to the connection position.
Thus, the operation of attaching the CR suppressor 12 to the floor surface of the circuit breaker chamber 10 and grounding the ground wire 15 to the circuit breaker chamber 10 side is performed in a state before the carriage frame 7 on which the main body frame 3 is placed is arranged. Therefore, workability can be improved.

なお、実施の形態１の場合と同様に、遮断器本体の主回路部と接続される付属機器は、サージアブソーバであるＣＲサプレッサに限定するものではなく、ＣＲサプレッサ以外のサージアブソーバでも良く、計器用変圧器（ＶＴ）であっても良い。   As in the case of the first embodiment, the accessory device connected to the main circuit portion of the circuit breaker body is not limited to the CR suppressor that is a surge absorber, and may be a surge absorber other than the CR suppressor. It may be a transformer (VT).

以上のように、実施の形態２の真空遮断器によれば、サージアブソーバを真空遮断器が収容される遮断器室の床面に載置されて固定されているため、サージアブソーバを予め遮断器室に取り付けた状態で、台車フレームに搭載した遮断器本体部を遮断器室のレールに載置して押し込むことによって組み合わせることができ、組立の作業性を向上させることができる。   As described above, according to the vacuum circuit breaker of the second embodiment, since the surge absorber is mounted and fixed on the floor surface of the circuit breaker chamber in which the vacuum circuit breaker is accommodated, the surge absorber is previously interrupted. The circuit breaker main body mounted on the bogie frame can be combined by being placed on the rail of the circuit breaker chamber and pushed in while attached to the chamber, and the assembly workability can be improved.

また、例えば、既設のガス遮断器を真空遮断器に置き換えるような作業において、サージアブソーバの付設が必要となった場合でも、容易に設置することができる。   In addition, for example, when an existing gas circuit breaker is replaced with a vacuum circuit breaker, it is possible to easily install a surge absorber even if it is necessary to attach a surge absorber.

なお、本願発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変更、省略したりすることが可能である。   In the present invention, it is possible to freely combine the respective embodiments within the scope of the invention, and to appropriately change or omit the respective embodiments.

１：真空遮断器、２：真空バルブ、２ａ：可動電極棒、３：本体フレーム、
４：固定側主回路端子、５：可動側主回路端子、６：主回路接触子、
７：台車フレーム、７ａ：車輪、８：フェースプレート、９：絶縁ロッド、
１０：遮断器室、１１：断路部、１２：ＣＲサプレッサ（サージアブソーバ）、
１２ａ：本体ケース、１２ｂ：取付フランジ、１２ｃ：接続端子、１２ｄ：接地端子、
１３：接続導体、１４：接触子、１５：接地線。 1: vacuum circuit breaker, 2: vacuum valve, 2a: movable electrode rod, 3: body frame,
4: fixed main circuit terminal, 5: movable main circuit terminal, 6: main circuit contact,
7: Bogie frame, 7a: Wheel, 8: Face plate, 9: Insulating rod,
10: Circuit breaker room, 11: Disconnection part, 12: CR suppressor (surge absorber),
12a: body case, 12b: mounting flange, 12c: connection terminal, 12d: ground terminal,
13: Connection conductor, 14: Contact, 15: Ground wire.

Claims (3)

固定接点および可動接点を有する真空バルブと、
前記真空バルブの軸線を上下に向けて前記真空バルブを収容する本体フレームと、
前記真空バルブの上部側及び下部側接点に電気的に接続され、前記本体フレームの後方に導出された上部側及び下部側の主回路端子と、
前記本体フレームが搭載され、前後方向に移動可能な台車フレームと、
前記本体フレームの後方で前記下部側の主回路端子の下方に配置され、上部に前記下部側の主回路端子に接続される接続端子を有するサージアブソーバと、真空遮断器の相数分の前記サージアブソーバを水平に並べ、かつ、前記主回路端子の導出方向に対して直交する方向に並置し、前記サージアブソーバを一括して支持する本体ケースと、を備え、前記サージアブソーバの前記接続端子と前記下部側の主回路端子とを電気的に接続したことを特徴とする真空遮断器。 A vacuum valve having a fixed contact and a movable contact;
A main body frame that accommodates the vacuum valve with the axis of the vacuum valve facing up and down;
Main circuit terminals on the upper side and the lower side that are electrically connected to the upper and lower contacts of the vacuum valve and led out behind the main body frame;
A bogie frame mounted with the main body frame and movable in the front-rear direction;
A surge absorber disposed below the main circuit terminal on the lower side behind the main body frame and having a connection terminal connected to the main circuit terminal on the lower side on the upper side, and the surge corresponding to the number of phases of the vacuum circuit breaker A main body case that horizontally arranges the absorbers, and juxtaposes the surge absorbers in a direction orthogonal to the lead-out direction of the main circuit terminals, and collectively supports the surge absorbers, and the connection terminals of the surge absorbers and the A vacuum circuit breaker characterized in that the main circuit terminal on the lower side is electrically connected. 請求項１記載の真空遮断器において、
前記本体ケースは、前記本体フレームの後方の前記台車フレームに固定されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 1,
The vacuum circuit breaker characterized in that the main body case is fixed to the carriage frame at the rear of the main body frame. 請求項１記載の真空遮断器において、
前記本体ケースは、前記真空遮断器が収容される遮断器室の床面に固定されていることを特徴とする真空遮断器。 The vacuum circuit breaker according to claim 1,
The said main body case is being fixed to the floor surface of the circuit breaker chamber in which the said vacuum circuit breaker is accommodated, The vacuum circuit breaker characterized by the above-mentioned.
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