JP2000299041A - Vacuum circuit-breaker - Google Patents
Vacuum circuit-breakerInfo
- Publication number
- JP2000299041A JP2000299041A JP11105375A JP10537599A JP2000299041A JP 2000299041 A JP2000299041 A JP 2000299041A JP 11105375 A JP11105375 A JP 11105375A JP 10537599 A JP10537599 A JP 10537599A JP 2000299041 A JP2000299041 A JP 2000299041A
- Authority
- JP
- Japan
- Prior art keywords
- movable
- opening
- vacuum
- electrode
- vacuum valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、送配電等に用い
られる真空遮断器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker used for power transmission and distribution.
【０００２】[0002]
【従来の技術】従来の真空遮断器の構成を図８に示して
あり、真空バルブ１００は真空容器１０１と、この真空
容器１０１内に設けられた固定電極１０３および可動電
極１０４と、固定電極１０３を支持した固定軸１０５お
よび可動電極１０４を支持した可動軸１０６とで構成さ
れている。2. Description of the Related Art FIG. 8 shows the structure of a conventional vacuum circuit breaker. A vacuum valve 100 includes a vacuum vessel 101, a fixed electrode 103 and a movable electrode 104 provided in the vacuum vessel 101, and a fixed electrode 103. And a movable shaft 106 supporting the movable electrode 104.
【０００３】可動軸１０６は真空容器１０１の壁面を摺
動自在に貫通してその外部に延出しているとともに、そ
の延出部分に反発リング１０７が取り付けられ、この反
発リング１０７に対向して電磁反発コイル１０８が設け
られている。また、可動軸１０６にはワイプばね１０９
が設けられ、このワイプばね１０９により可動電極１０
４が固定電極１０３に所定のワイプ荷重で接触するよう
に保持されている。The movable shaft 106 extends slidably through the wall surface of the vacuum vessel 101 and extends to the outside thereof. A repulsion ring 107 is attached to the extended portion. A repulsion coil 108 is provided. The movable shaft 106 has a wipe spring 109.
Is provided, and the movable electrode 10 is
4 is held so as to contact the fixed electrode 103 with a predetermined wipe load.
【０００４】そして短絡事故電流が流れたときに、電磁
反発コイル１０８をコンデンサ１１０の放電電流により
励磁し、この励磁で可動軸１０６に取り付けられた反発
リング１０７を反発させて可動電極１０４を固定電極１
０３から高速開極させて事故電流を遮断するようになっ
ている。When a short-circuit fault current flows, the electromagnetic repulsion coil 108 is excited by the discharge current of the capacitor 110, and the excitation causes the repulsion ring 107 attached to the movable shaft 106 to repel, thereby moving the movable electrode 104 to the fixed electrode. 1
03 is opened at a high speed to cut off the fault current.
【０００５】通常の開閉操作には投入コイル１１１が用
いられ、この投入コイル１１１が励磁されている間は可
動電極１０４の閉極状態が維持され、励磁の解除に応じ
て開極ばね１１２の弾性力で可動電極１０４が開極し、
この開極状態が開極ばね１１２の弾性力で維持されるよ
うになっている。The closing coil 111 is used for normal opening and closing operations, and while the closing coil 111 is excited, the closed state of the movable electrode 104 is maintained. The movable electrode 104 is opened by force,
This open state is maintained by the elastic force of the opening spring 112.
【０００６】[0006]
【発明が解決しようとする課題】ところで、電磁反発コ
イル１０８が励磁されて高速で開極するときには、その
反発の衝撃による可動軸１０６の跳ね返りで可動電極１
０４が再閉極してしまう恐れがあり、このため従来にお
いては、高速開極したときに瞬時に可動軸１０６を保持
して可動電極１０４の再閉極を抑える独立したキャッチ
機構１１３が設けられている。When the electromagnetic repulsion coil 108 is excited and opens at a high speed, the movable electrode 106 rebounds due to the rebound of the movable shaft 106 due to the impact of the repulsion.
There is a danger that the electrode 04 may reclose. For this reason, in the related art, an independent catch mechanism 113 for holding the movable shaft 106 instantaneously and suppressing the re-closing of the movable electrode 104 at the time of high-speed opening is provided. ing.
【０００７】高速開極時における可動軸１０６の衝撃エ
ネルギーは相当大きく、このため従来おいてはリンク機
構等の複雑な機構のキャッチ機構１１３を用いて高速開
極時に可動軸１０６を保持するようにしており、このた
めその構成が大掛かりで、設置上のスペースの点、およ
び製作上のコストの点で不利を招く結果となっている。[0007] The impact energy of the movable shaft 106 at the time of high-speed opening is considerably large. Therefore, in the related art, the movable shaft 106 is held at the time of high-speed opening using a catch mechanism 113 of a complicated mechanism such as a link mechanism. As a result, the configuration is large, resulting in disadvantages in terms of installation space and manufacturing costs.
【０００８】この発明はこのような点に着目してなされ
たもので、その目的とするところは、複雑な独立したキ
ャッチ機構を要することなく、通常の開閉操作を行うた
めの開閉操作機構を利用して高速開極時における可動軸
の跳ね返りを抑えて的確に可動電極の開極状態を維持す
ることができる真空遮断器を提供することにある。The present invention has been made in view of such a point, and an object thereof is to use an opening / closing operation mechanism for performing a normal opening / closing operation without requiring a complicated independent catch mechanism. It is another object of the present invention to provide a vacuum circuit breaker capable of suppressing the rebound of the movable shaft at the time of high-speed opening and accurately maintaining the movable electrode in the open state.
【０００９】[0009]
【課題を解決するための手段】この発明はこのような目
的を達成するために、固定電極に対して接離する可動電
極およびこの可動電極を支持した可動軸を備える真空バ
ルブと、この真空バルブの可動電極を電磁反発コイルに
よる電磁反発力で高速開極させる高速開極機構と、可動
部材を永久磁石およびソレノイドを用いて所定のストロ
ークで動作させる開閉操作機構と、この開閉操作機構の
可動部材と真空バルブの可動軸とを接続体を介して一定
範囲の相対移動が可能な状態に接続させたカップリング
機構とを具備し、真空バルブの高速開極時には高速開極
機構の動作に合わせて開閉操作機構の可動部材を動作さ
せ、この可動部材により真空バルブの可動軸を保持して
可動電極の開極状態を維持し、通常の開閉時には開閉操
作機構の可動部材のストローク動作で可動電極の開閉を
行なうようにしたものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vacuum valve having a movable electrode which comes into contact with and separates from a fixed electrode, a movable shaft supporting the movable electrode, and the vacuum valve. A high-speed opening mechanism that opens the movable electrode at high speed with an electromagnetic repulsion force of an electromagnetic repulsion coil, an opening and closing operation mechanism that operates a movable member at a predetermined stroke using a permanent magnet and a solenoid, and a movable member of the opening and closing operation mechanism And a coupling mechanism that connects the movable shaft of the vacuum valve and a movable shaft of the vacuum valve through a connecting body so that relative movement within a certain range is possible. The movable member of the opening / closing operation mechanism is operated, and the movable member holds the movable shaft of the vacuum valve to maintain the open state of the movable electrode. It is obtained to carry out the opening and closing of the movable electrode at a stroke operation.
【００１０】そして請求項２の発明では、カップリング
機構には真空バルブの高速開極時における可動軸の動作
をガイドするガイド手段が設けられていることを特徴と
している。[0010] The invention according to claim 2 is characterized in that the coupling mechanism is provided with guide means for guiding the operation of the movable shaft at the time of high-speed opening of the vacuum valve.
【００１１】請求項３の発明では、カップリング機構に
は真空バルブの高速開極時における可動軸の動作の衝撃
を吸収する衝撃吸収手段が設けられていることを特徴と
している。[0011] The invention according to claim 3 is characterized in that the coupling mechanism is provided with an impact absorbing means for absorbing the impact of the operation of the movable shaft when the vacuum valve is opened at a high speed.
【００１２】請求項４の発明では、高速開極機構の電磁
反発コイルにはコンデンサおよびサイリスタスイッチを
用いる回路を介して電流を供給し、励磁させることを特
徴としている。According to a fourth aspect of the present invention, a current is supplied to the electromagnetic repulsion coil of the high-speed opening mechanism through a circuit using a capacitor and a thyristor switch to excite the coil.
【００１３】請求項５の発明では、真空バルブにおける
可動電極の開極時のギャップを開閉操作機構の可動部材
のストロークにより調整可能としてあることを特徴とし
ている。According to a fifth aspect of the present invention, the gap of the vacuum valve when the movable electrode is opened can be adjusted by the stroke of the movable member of the opening / closing operation mechanism.
【００１４】請求項６の発明では、真空バルブが複数で
あって、その各真空バルブの高速開極機構における電磁
反発コイルを一括して接続し、１つのサイリスタスイッ
チでその各電磁反発コイルを駆動することを特徴として
いる。According to the invention of claim 6, there are a plurality of vacuum valves, the electromagnetic repulsion coils in the high-speed opening mechanism of each vacuum valve are connected together, and each electromagnetic repulsion coil is driven by one thyristor switch. It is characterized by doing.
【００１５】[0015]
【発明の実施の形態】以下、この発明の具体的な実施形
態について説明する。図１に示す実施形態においては、
３つの同一構成の真空バルブ１が設けられている。各真
空バルブ１は、真空容器２と、この真空容器２内に設け
られた固定電極３および可動電極４と、固定電極３を支
持した固定軸５および可動電極４を支持した可動軸６と
からなり、前記固定電極３と可動電極４とで接点機構７
が構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. In the embodiment shown in FIG.
Three vacuum valves 1 having the same configuration are provided. Each vacuum valve 1 includes a vacuum vessel 2, a fixed electrode 3 and a movable electrode 4 provided in the vacuum vessel 2, and a fixed shaft 5 supporting the fixed electrode 3 and a movable shaft 6 supporting the movable electrode 4. The fixed electrode 3 and the movable electrode 4 form a contact mechanism 7.
Is configured.
【００１６】可動軸４は真空容器２の壁面を摺動自在に
貫通してその外部下方に延出し、その延出部分に反発リ
ング８が取り付けられ、この反発リング８に対向して真
空容器２の外周に電磁反発コイル９が設けられ、またこ
の可動軸６の下端部に鍔部材１０が一体的に設けられて
いる。The movable shaft 4 slidably penetrates the wall surface of the vacuum vessel 2 and extends downward and outward. A repulsion ring 8 is attached to the extended portion, and the rebound ring 8 is opposed to the repulsion ring 8. An electromagnetic repulsion coil 9 is provided on the outer periphery of the movable shaft 6, and a flange member 10 is integrally provided on a lower end portion of the movable shaft 6.
【００１７】各真空バルブ１の下方にはその各真空バル
ブ１に対応してそれぞれカップリング機構１３が設けら
れている。これらカップリング機構１３は電気絶縁材料
からなる接続体１４を有し、これら接続体１４が共通の
支持フレーム１５を介して同一のレベルに支持されてい
る。Below each vacuum valve 1, a coupling mechanism 13 is provided corresponding to each vacuum valve 1. These coupling mechanisms 13 have connectors 14 made of an electrically insulating material, which are supported at the same level via a common support frame 15.
【００１８】各接続体１４にはガイド孔１７が形成さ
れ、また各可動軸６の下端部に棒状のガイド１８が設け
られ、これらガイド１８がその対応する接続体１４のガ
イド孔１７内に摺動自在に挿入されている。A guide hole 17 is formed in each connection body 14, and a rod-shaped guide 18 is provided at the lower end of each movable shaft 6. These guides 18 slide into guide holes 17 of the corresponding connection body 14. It is movably inserted.
【００１９】各可動軸６の鍔部材１０と各接続体１４と
の間にはそれぞれワイプばね２０が設けられ、これらワ
イプばね２０により可動軸６が上方に弾性的に付勢さ
れ、この付勢力で可動電極４が固定電極３に所定のワイ
プ荷重で接触するように保持されている。A wipe spring 20 is provided between the flange member 10 of each movable shaft 6 and each connector 14, and the movable shaft 6 is elastically urged upward by the wipe springs 20. The movable electrode 4 is held so as to contact the fixed electrode 3 with a predetermined wipe load.
【００２０】各接続体１４の上部にはそれぞれほぼコ字
状をなす押え部材２１が設けられ、これら押え部材２１
の上部壁面に透孔２２が形成され、これら透孔２２内を
可動軸６が摺動自在に貫通する状態となっている。そし
て可動軸６の鍔部材１０が押え部材２１の内側に配置
し、この鍔部材１０が押え部材２１に当接することによ
り可動軸６の接続体１４に対する移動の範囲が規制され
るようになっている。すなわち、可動軸６は接続体１４
に対して相対的な移動が可能に接続されているが、鍔部
材１０と押え部材２１とによりその移動の範囲が一定の
範囲に規制されている。At the upper part of each connecting member 14, a pressing member 21 having a substantially U-shape is provided.
Through holes 22 are formed in the upper wall surface of the movable shaft 6, and the movable shaft 6 penetrates through the inside of the through holes 22 in a slidable manner. Then, the flange member 10 of the movable shaft 6 is arranged inside the holding member 21, and the range of movement of the movable shaft 6 with respect to the connector 14 is regulated by the contact of the flange member 10 with the holding member 21. I have. That is, the movable shaft 6 is
, The movement range is regulated by the flange member 10 and the pressing member 21 to a certain range.
【００２１】そして、可動電極４が固定電極３に接触す
る状態のもとでは可動軸６の鍔部材１０と押え部材２１
の上部壁面との間に僅かな隙間が確保され、この隙間に
よりワイプばね２０の弾性力が可動電極４に及んでその
可動電極４が固定電極３に所定のワイプ荷重で接触する
ように保持されている。When the movable electrode 4 is in contact with the fixed electrode 3, the flange member 10 of the movable shaft 6 and the pressing member 21
A slight gap is secured between the movable electrode 4 and the upper wall surface, and the elastic force of the wipe spring 20 reaches the movable electrode 4 to hold the movable electrode 4 in contact with the fixed electrode 3 with a predetermined wipe load. ing.
【００２２】接続体１４の上部には可動軸６の下端面と
対向し、かつガイド１８を囲むように衝撃吸収手段を構
成する緩衝材としての筒状の制振ゴム２３が設けられて
いる。A cylindrical vibration damping rubber 23 is provided at the upper part of the connecting body 14 as a cushioning material which constitutes a shock absorbing means and faces the lower end surface of the movable shaft 6 and surrounds the guide 18.
【００２３】各接続体１４を支持した支持フレーム１５
の下方には開閉操作機構２６が設けられ、この開閉操作
機構２６はベース２７と、このベース２７に対して上下
動可能に設けられた可動部材２８とを備え、可動部材２
８にはベース２７を摺動自在に貫通してその上方に延出
する作動軸２９が設けられ、この作動軸２９が前記支持
フレーム１５に連結されている。A supporting frame 15 supporting each connecting member 14
An opening / closing operation mechanism 26 is provided below, and the opening / closing operation mechanism 26 includes a base 27 and a movable member 28 provided to be vertically movable with respect to the base 27.
8 is provided with an operating shaft 29 which slidably penetrates through the base 27 and extends upward. The operating shaft 29 is connected to the support frame 15.
【００２４】ベース２７には可動部材２８を上方側に吸
引する永久磁石３０が取り付けられ、また可動部材２８
にはソレノイド３１が取り付けられている。さらにベー
ス２７と可動部材２８との間には可動部材２８を下方に
弾性的に付勢する複数の開極ばね３２が設けられてい
る。A permanent magnet 30 for attracting the movable member 28 upward is attached to the base 27.
Is provided with a solenoid 31. Further, a plurality of opening springs 32 are provided between the base 27 and the movable member 28 to elastically urge the movable member 28 downward.
【００２５】次に、このように構成された真空遮断器の
作用について説明する。図１においては、永久磁石３０
による磁気吸引力で可動部材２８が所定のレベルの位置
に保持され、各真空バルブ１の可動電極４が固定電極３
にワイプばね２０により所定のワイパ荷重を保って接触
する閉極状態にある。Next, the operation of the vacuum circuit breaker thus configured will be described. In FIG. 1, the permanent magnet 30
The movable member 28 is held at a predetermined level position by the magnetic attraction force of
In a closed state where the wiper spring 20 contacts the wiper 20 while maintaining a predetermined wiper load.
【００２６】図２には、短絡事故の発生に伴う高速開極
時の動作を順に示してある。図２（Ａ）は真空バルブ１
の閉極時の状態であり、この状態から短絡事故等が発生
すると、これが制御装置（図示せず）により検出され、
この検出で開極用の信号がサイリスタスイッチ３５に出
力され、この出力でサイリスタスイッチ３５がオンし、
コンデンサ３６から電磁反発コイル９に放電電流が供給
され、この電磁反発コイル９が励磁される。FIG. 2 shows the operation at the time of high-speed opening when a short circuit accident occurs. FIG. 2A shows a vacuum valve 1.
When a short circuit accident or the like occurs from this state, this is detected by a control device (not shown),
A signal for opening is output to the thyristor switch 35 by this detection, and the thyristor switch 35 is turned on by this output,
A discharge current is supplied from the capacitor 36 to the electromagnetic repulsion coil 9, and the electromagnetic repulsion coil 9 is excited.
【００２７】電磁反発コイル９の励磁により、図２
（Ｂ）に示すように、反発リング８が瞬間的に反発動作
し、この動作で可動軸６が下方に瞬間的に下降し、可動
電極４が固定電極３から離間して高速開極が達成され、
事故電流が遮断される。By exciting the electromagnetic repulsion coil 9, FIG.
As shown in (B), the repulsion ring 8 instantaneously repels, and by this operation, the movable shaft 6 instantaneously descends downward, and the movable electrode 4 separates from the fixed electrode 3 to achieve high-speed opening. And
The fault current is interrupted.
【００２８】このとき、可動軸６のガイド１８はガイド
孔１７に沿って真空バルブ１の中心軸線上に沿って下降
する。そして可動軸６はワイプばね２０を圧縮し、制振
ゴム２３に衝突し、この制振ゴム２３により可動軸６の
下降時の衝撃が吸収される。At this time, the guide 18 of the movable shaft 6 descends along the guide hole 17 along the central axis of the vacuum valve 1. Then, the movable shaft 6 compresses the wipe spring 20 and collides with the vibration damping rubber 23, which absorbs a shock when the movable shaft 6 descends.
【００２９】一方、開閉操作機構２６のソレノイド３１
には、事故発生時に同時に前記制御装置による制御で可
動部材２８に永久磁石３０と反発する方向の磁力を生じ
させる電流が供給される。On the other hand, the solenoid 31 of the opening / closing operation mechanism 26
Is supplied with a current that causes the movable member 28 to generate a magnetic force in a direction that repels the permanent magnet 30 under the control of the control device at the same time when an accident occurs.
【００３０】そしてこのソレノイド３１の励磁により、
図２（Ｃ）に示すように可動部材２８が下方に押し下げ
られ、この可動部材２８と一体にカップリング機構１３
の接続体１４が下降し、この接続体１４の下降により押
え部材２１が可動軸６の鍔部材１０に当接し、この当接
で高速開極時の可動軸６の跳ね返りが抑えられ、可動電
極４の再閉極が防止される。Then, by the excitation of the solenoid 31,
As shown in FIG. 2C, the movable member 28 is pushed down, and the coupling mechanism 13 is integrated with the movable member 28.
The connecting member 14 of the movable member 6 descends, and the holding member 21 abuts on the flange member 10 of the movable shaft 6 due to the descending of the connecting member 14. 4 is prevented from re-closing.
【００３１】さらに連続して図２（Ｄ）に示すように接
続体１４が下降し、この下降で押え部材２１を介して可
動軸６がさらに下方に引き下げられ、この引き下げで可
動電極４が固定電極３からさらに大きく開極する。Further, as shown in FIG. 2 (D), the connecting member 14 descends, and the movable shaft 6 is further pulled down through the pressing member 21 by this descending, and the movable electrode 4 is fixed by this pulling down. The electrode is opened further from the electrode 3.
【００３２】この後、ソレノイド３１の励磁が解除され
る。可動部材２８が所定の位置にまで下降して可動電極
４と固定電極３との間に所定のギャップ（開極距離）が
形成されたときには、永久磁石３０と可動部材２８との
間の距離が一定以上に拡大し、このため可動部材２８に
対する永久磁石３０の磁気吸引力が減退し、開極ばね３
２の弾性的な付勢力がその吸引力に勝る関係となり、し
たがってこの時点でソレノイド３１の励磁が解除されて
も開極ばね３２の付勢力で可動部材２８が所定位置に保
持され、可動電極４の開極状態が維持され、その開極の
ギャップが所定寸法に保持される。Thereafter, the excitation of the solenoid 31 is released. When the movable member 28 descends to a predetermined position to form a predetermined gap (opening distance) between the movable electrode 4 and the fixed electrode 3, the distance between the permanent magnet 30 and the movable member 28 is reduced. As a result, the magnetic attraction of the permanent magnet 30 to the movable member 28 decreases, and the opening spring 3
Therefore, the movable member 28 is held in a predetermined position by the biasing force of the opening spring 32 even if the excitation of the solenoid 31 is released at this point, and the movable electrode 4 Is maintained, and the gap of the opening is maintained at a predetermined dimension.
【００３３】次に、通常の開閉時の動作について説明す
る。図３には通常の開閉時の動作を順に示してあり、図
３（Ａ）においては、永久磁石３０による磁気吸引力で
可動部材２８が所定のレベルの位置に保持され、真空バ
ルブ１の可動電極４が固定電極３にワイプばね２０によ
り所定のワイパ荷重で接触する閉極状態にある。Next, the operation at the time of normal opening and closing will be described. 3A and 3B show the normal opening and closing operations in order. In FIG. 3A, the movable member 28 is held at a predetermined level by the magnetic attraction force of the permanent magnet 30, and the movable operation of the vacuum valve 1 is performed. The electrode 4 is in a closed state where the fixed electrode 3 contacts the wiper spring 20 with a predetermined wiper load.
【００３４】この状態から通常の開極操作が行なわれる
と、制御装置を介して開閉操作機構２６のソレノイド３
１に、可動部材２８に永久磁石３０と反発する方向の磁
力を生じさせる電流が供給され、これにより図３（Ｂ）
に示すように可動部材２８が下方に押し下げられる。When the normal opening operation is performed from this state, the solenoid 3 of the opening / closing operation mechanism 26 is controlled via the control device.
1 is supplied to the movable member 28 with a current that generates a magnetic force in a direction that repels the permanent magnet 30. As a result, FIG.
The movable member 28 is pushed down as shown in FIG.
【００３５】そしてこの可動部材２８と一体にカップリ
ング機構１３の接続体１４が下降し、この接続体１４の
下降により押え部材２１が可動軸６の鍔部材１０に当接
する。Then, the connecting member 14 of the coupling mechanism 13 descends integrally with the movable member 28, and the pressing member 21 comes into contact with the flange member 10 of the movable shaft 6 by the descending of the connecting member 14.
【００３６】さらに連続して図３（Ｃ）に示すように接
続体１４が下降し、この下降で押え部材２１を介して可
動軸６がさらに下方に引き下げられ、この引き下げで可
動電極４が固定電極３から開極する。Further, as shown in FIG. 3 (C), the connecting member 14 descends continuously, and the movable shaft 6 is further pulled down through the pressing member 21 by this descending, and the movable electrode 4 is fixed by this pulling down. The electrode is opened from the electrode 3.
【００３７】そして可動部材２８がさらに下降すること
により、図３（Ｄ）に示すように、可動電極４が固定電
極３からさらに大きく所定のギャップが生じるまで開極
する。When the movable member 28 further descends, the movable electrode 4 is opened until a predetermined gap is generated from the fixed electrode 3 as shown in FIG. 3D.
【００３８】この後、ソレノイドの励磁が解除される。
可動部材２８が所定の位置にまで下降して可動電極４と
固定電極３との間に所定のギャップが形成されたときに
は、永久磁石３０と可動部材２８との間の距離が一定以
上に拡大し、このため可動部材２８に対する永久磁石３
０の磁気吸引力が減退し、開極ばね３２の弾性的な付勢
力がその吸引力に勝る関係となり、したがってこの時点
でソレノイド３１の励磁が解除されても開極ばね３２の
付勢力で可動部材２８が所定位置に保持され、可動電極
４が所定のギャップを保って開極する開極状態が維持さ
れる。Thereafter, the excitation of the solenoid is released.
When the movable member 28 descends to a predetermined position to form a predetermined gap between the movable electrode 4 and the fixed electrode 3, the distance between the permanent magnet 30 and the movable member 28 increases to a certain value or more. Therefore, the permanent magnet 3 for the movable member 28
0, the magnetic attraction force is reduced, and the elastic biasing force of the opening spring 32 has a relationship superior to the attraction force. Therefore, even if the solenoid 31 is de-energized at this point, it can be moved by the biasing force of the opening spring 32. The member 28 is held at a predetermined position, and the movable electrode 4 is maintained at a predetermined gap to maintain an open state.
【００３９】また、この開極状態から閉極操作が行われ
たときには、制御装置を介して開閉操作機構２６のソレ
ノイド３１に、可動部材２８に永久磁石３０と吸引しあ
う方向の磁力を生じさせる電流が供給され、これにより
可動部材２８が上方に引き上げられる。When the closing operation is performed from the open state, the solenoid 31 of the opening / closing operation mechanism 26 causes the movable member 28 to generate a magnetic force in the direction of attracting the permanent magnet 30 through the control device. An electric current is supplied, whereby the movable member 28 is pulled upward.
【００４０】そして可動部材２８の上昇によりこれと一
体にカップリング機構１３の接続体１４および可動軸６
が上昇し、一定位置まで上昇すると、可動軸６の可動電
極４が固定電極３に接触する。When the movable member 28 is raised, the connecting member 14 of the coupling mechanism 13 and the movable shaft 6 are integrally formed therewith.
Rises to a certain position, and the movable electrode 4 of the movable shaft 6 comes into contact with the fixed electrode 3.
【００４１】この接触で可動軸６の上昇は停止するが、
接続体１４の上昇はさらに続き、これにより押え部材２
１が可動軸６の鍔部材１０から離間し、この離間により
可動電極４にワイプばね２０の付勢力が作用し、可動電
極４が所定のワイプ荷重で固定電極３に接触して所定の
閉極状態となる。そしてこの後、ソレノイド３１の励磁
が解除され、永久磁石３０による電磁吸引力で可動電極
４の閉極状態が維持される。Although the movable shaft 6 stops rising due to this contact,
The lifting of the connecting body 14 continues further, whereby the holding member 2
1 is separated from the flange member 10 of the movable shaft 6, and the biasing force of the wipe spring 20 acts on the movable electrode 4 by this separation, and the movable electrode 4 comes into contact with the fixed electrode 3 with a predetermined wipe load to close the predetermined electrode. State. After that, the excitation of the solenoid 31 is released, and the closed state of the movable electrode 4 is maintained by the electromagnetic attraction force of the permanent magnet 30.
【００４２】図４にはこの発明の真空遮断器における高
速開極時の特性図を示してある。この図は電磁反発コイ
ル９に５０００Ａ、５００Ｈｚの電流を印加したときの
例である。FIG. 4 is a characteristic diagram of the vacuum circuit breaker of the present invention at the time of high-speed opening. This figure is an example when a current of 5000 A and 500 Hz is applied to the electromagnetic repulsion coil 9.
【００４３】図４中に破線で示す曲線イは電磁反発コイ
ル電流、実線で示す曲線ロは真空バルブ１の可動電極４
のストローク、鎖線で示す曲線ハは開閉操作機構２６の
可動部材２８のストロークをそれぞれ表している。In FIG. 4, a curve A shown by a broken line is an electromagnetic repulsion coil current, and a curve B shown by a solid line is a movable electrode 4 of the vacuum valve 1.
And a curve C shown by a chain line represents a stroke of the movable member 28 of the opening and closing operation mechanism 26, respectively.
【００４４】そしてこの特性図に示されているように、
通電開始後０．５サイクル（２ｍｓ）で可動電極４のス
トロークは最大値（１０ｍｍ）に達する。この後、可動
電極４のストロークは、電磁反発コイル電流が零となっ
てその電磁反発力が消失した後にも一定時間最大ストロ
ークを維持しているが、やがてそのストロークが減少し
かける。And, as shown in this characteristic diagram,
The stroke of the movable electrode 4 reaches the maximum value (10 mm) in 0.5 cycles (2 ms) after the start of energization. Thereafter, the stroke of the movable electrode 4 maintains the maximum stroke for a certain period of time even after the electromagnetic repulsion coil current becomes zero and the electromagnetic repulsion disappears, but the stroke gradually decreases.
【００４５】しかし、同時に動作を開始している開閉操
作機構２６の可動部材２８のストロークにより最終的に
その開閉操作機構２６で設定されたストロークで可動電
極４は開極保持される。However, the movable electrode 4 is kept open by the stroke set by the opening / closing operation mechanism 26 finally by the stroke of the movable member 28 of the opening / closing operation mechanism 26 which starts the operation at the same time.
【００４６】この特性図は、電磁反発コイル電流を１サ
イクル通電とした場合の例であるが、サイリスタスイッ
チにより通電周波数を１サイクルより多くし（例えば
２．５サイクル）、電磁反発力を継続させることで可動
軸６の跳ね返りを抑制することも可能である。また、開
閉操作機構２６の可動部材２８のストロークを変えるこ
とにより、可動電極４の開極安定時のギャップを任意に
調整することが可能である。This characteristic diagram shows an example in which the electromagnetic repulsion coil current is energized for one cycle. However, the energizing frequency is increased by more than one cycle (for example, 2.5 cycles) by a thyristor switch, and the electromagnetic repulsion force is continued. This makes it possible to suppress the rebound of the movable shaft 6. Further, by changing the stroke of the movable member 28 of the opening / closing operation mechanism 26, it is possible to arbitrarily adjust the gap when the opening of the movable electrode 4 is stable.
【００４７】図５にはこの発明の真空遮断器の回路構成
を示してある。この図は１相分の真空バルブ１を駆動す
る場合の例で、真空バルブ１の固定軸５が主回路電源部
４０に接続され、可動軸６が主回路負荷部４１に接続さ
れている。そして真空遮断器の制御装置４２は、高速開
極制御ユニット４３と開閉制御ユニット４４とで構成さ
れ、これら制御ユニット４３，４４がそれぞれ制御電源
４５に接続されている。FIG. 5 shows a circuit configuration of the vacuum circuit breaker of the present invention. This figure shows an example in which the vacuum valve 1 for one phase is driven. The fixed shaft 5 of the vacuum valve 1 is connected to the main circuit power supply unit 40, and the movable shaft 6 is connected to the main circuit load unit 41. The control device 42 of the vacuum circuit breaker includes a high-speed opening control unit 43 and an opening / closing control unit 44. These control units 43 and 44 are connected to a control power supply 45, respectively.
【００４８】高速開極制御ユニット４３は、変圧器４
６、整流器４７、電流制限抵抗４８で構成されるコンデ
ンサ充電ユニット４９とサイリスタスイッチ３５とから
なり、コンデンサ充電ユニット４９によりコンデンサ３
６が常時設定電圧に充電されている。The high-speed opening control unit 43 includes the transformer 4
6, a rectifier 47, a capacitor charging unit 49 composed of a current limiting resistor 48, and a thyristor switch 35.
6 is constantly charged to the set voltage.
【００４９】そして、主回路に短絡等の事故が発生する
と、過電流検出器５１が事故電流を検出し、開極信号が
高速開極制御ユニット４３、開閉制御ユニット４４に送
られる。これにより、高速開極制御ユニット４３のサイ
リスタスイッチ３５が駆動され、コンデンサ３６に充電
されている電圧が放電し、電磁反発コイル９が励磁され
るとともに、同時に開閉制御ユニット４４により開閉操
作機構２６のソレノイド３１が励磁され、可動部材２８
が駆動されて高速開極が行われる。When an accident such as a short circuit occurs in the main circuit, the overcurrent detector 51 detects an accident current, and an opening signal is sent to the high-speed opening control unit 43 and the switching control unit 44. As a result, the thyristor switch 35 of the high-speed opening control unit 43 is driven, the voltage charged in the capacitor 36 is discharged, and the electromagnetic repulsion coil 9 is excited. The solenoid 31 is excited and the movable member 28
Is driven to perform high-speed opening.
【００５０】図５は単相回路の場合であるが、図６に示
すように、３相回路の場合には、電磁反発コイル９およ
びコンデンサ３６を３相独立して接続することにより実
現することができる。FIG. 5 shows a case of a single-phase circuit. However, as shown in FIG. 6, in the case of a three-phase circuit, it is necessary to connect the electromagnetic repulsion coil 9 and the capacitor 36 independently in three phases. Can be.
【００５１】さらに図７に示すように構成することも可
能であり、この回路構成においては、３相の真空バルブ
１を高速開極させるための電磁反発コイル９とコンデン
サ３６を３相一括して接続し、１つのサイリスタスイッ
チ３５で駆動する構成となっている。Further, it is possible to configure as shown in FIG. 7. In this circuit configuration, the electromagnetic repulsion coil 9 and the capacitor 36 for opening the three-phase vacuum valve 1 at high speed are collectively provided in three phases. It is connected and driven by one thyristor switch 35.
【００５２】この構成の場合には、電磁反発コイル９に
流れる分流電流は、独立に接続した場合の分流電流と大
きな変化はない。コンデンサ３６の長期信頼性を考慮す
ると、オープンモードでの劣化が発生した場合、独立接
続においては、劣化相の共振周波数のみが変化するた
め、劣化相の開極速度が大きく低下し、開極性能に影響
する。コンデンサ３６を一括に接続した場合は、正常時
と比べ共振周波数は変化するが、３相とも同様に変化す
るため、開極性能に与える影響を少なくすることができ
る。In the case of this configuration, the shunt current flowing through the electromagnetic repulsion coil 9 does not change much from the shunt current when independently connected. In consideration of the long-term reliability of the capacitor 36, when the deterioration in the open mode occurs, only the resonance frequency of the deteriorated phase changes in the independent connection. Affect. When the capacitors 36 are connected collectively, the resonance frequency changes as compared with the normal state, but the three phases also change, so that the influence on the opening performance can be reduced.
【００５３】[0053]
【発明の効果】以上説明したようにこの発明によれば、
従来のような複雑なキャッチ機構を要することなく、通
常の開閉操作を行うための開閉操作機構を利用して高速
開極時における可動軸の跳ね返りを抑え、可動電極の再
閉極を防止してその的確な開極状態を維持することがで
きる。As explained above, according to the present invention,
Without the need for a complicated catch mechanism as in the past, the opening and closing operation mechanism for normal opening and closing operation is used to suppress the rebound of the movable shaft at the time of high-speed opening and prevent the movable electrode from re-closing. The accurate opening state can be maintained.
【図１】この発明の一実施形態に係る真空遮断器の構成
を示す構成図。FIG. 1 is a configuration diagram showing a configuration of a vacuum circuit breaker according to an embodiment of the present invention.
【図２】その真空遮断器の高速開極時の動作を順に示す
説明図。FIG. 2 is an explanatory view sequentially showing the operation of the vacuum circuit breaker at the time of high-speed opening.
【図３】その真空遮断器の通常開閉時の動作を順に示す
説明図。FIG. 3 is an explanatory view sequentially showing the operation of the vacuum circuit breaker during normal opening and closing.
【図４】その真空遮断器の特性を示すグラフ図。FIG. 4 is a graph showing characteristics of the vacuum circuit breaker.
【図５】真空遮断器の駆動回路の一例を示す回路構成
図。FIG. 5 is a circuit diagram showing an example of a drive circuit of the vacuum circuit breaker.
【図６】真空遮断器の駆動回路の他の例を示す回路構成
図。FIG. 6 is a circuit diagram showing another example of the drive circuit of the vacuum circuit breaker.
【図７】真空遮断器の駆動回路のさらに異なる他の例を
示す回路構成図。FIG. 7 is a circuit diagram showing still another example of the drive circuit of the vacuum circuit breaker.
【図８】従来の真空遮断器の構成を示す構成図。FIG. 8 is a configuration diagram showing a configuration of a conventional vacuum circuit breaker.
１…真空バルブ ２…真空容器 ３…固定電極 ４…可動電極 ６…可動軸 ８…反発リング ９…電磁反発コイル １３…カップリング機構 １４…接続体 １７…ガイド孔 １８…ガイド ２０…ワイプばね ２１…押え部材 ２３…制振ゴム ２６…開閉操作機構 ２８…可動部材 ３０…永久磁石 ３１…ソレノイド ３２…開極ばね ３５…サイリスタスイッチ ３６…コンデンサ DESCRIPTION OF SYMBOLS 1 ... Vacuum valve 2 ... Vacuum container 3 ... Fixed electrode 4 ... Movable electrode 6 ... Movable shaft 8 ... Repulsion ring 9 ... Electromagnetic repulsion coil 13 ... Coupling mechanism 14 ... Connection body 17 ... Guide hole 18 ... Guide 20 ... Wipe spring 21 ... Pressing member 23 ... Rubber control rubber 26 ... Opening / closing operation mechanism 28 ... Movable member 30 ... Permanent magnet 31 ... Solenoid 32 ... Opening spring 35 ... Thyristor switch 36 ... Condenser
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松崎 順 東京都府中市東芝町１番地 株式会社東芝 府中工場内 (72)発明者 石川 佳延 東京都府中市東芝町１番地 株式会社東芝 府中工場内 (72)発明者 大塚 知美 東京都府中市東芝町１番地 株式会社東芝 府中工場内 Ｆターム(参考） 5G028 AA08 AA17 DB01 DB05 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Jun Matsuzaki 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Plant (72) Inventor Yoshinobu Ishikawa 1-Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba (72) Inventor Tomomi Otsuka 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu factory of Toshiba Corporation (reference) 5G028 AA08 AA17 DB01 DB05
Claims (6)
この可動電極を支持した可動軸を備える真空バルブと、
この真空バルブの可動電極を電磁反発コイルによる電磁
反発力で高速開極させる高速開極機構と、可動部材を永
久磁石およびソレノイドを用いて所定のストロークで動
作させる開閉操作機構と、この開閉操作機構の可動部材
と真空バルブの可動軸とを接続体を介して一定範囲の相
対移動が可能な状態に接続させたカップリング機構とを
具備し、 真空バルブの高速開極時には高速開極機構の動作に合わ
せて開閉操作機構の可動部材を動作させ、この可動部材
により真空バルブの可動軸を保持して可動電極の開極状
態を維持し、通常の開閉時には開閉操作機構の可動部材
のストローク動作で可動電極の開閉を行なうことを特徴
とする真空遮断器。1. A vacuum valve having a movable electrode which comes into contact with and separates from a fixed electrode, and a movable shaft which supports the movable electrode;
A high-speed opening mechanism that opens the movable electrode of the vacuum valve at a high speed by an electromagnetic repulsion force of an electromagnetic repulsion coil; an opening and closing operation mechanism that operates a movable member at a predetermined stroke using a permanent magnet and a solenoid; and an opening and closing operation mechanism. And a coupling mechanism in which the movable member of the vacuum valve and the movable shaft of the vacuum valve are connected to each other through a connecting body so as to be movable relative to each other within a certain range. The movable member of the opening / closing operation mechanism is operated in accordance with the above, and the movable member holds the movable shaft of the vacuum valve to maintain the open state of the movable electrode. A vacuum circuit breaker characterized by opening and closing a movable electrode.
極時における可動軸の動作をガイドするガイド手段が設
けられていることを特徴とする請求項１に記載の真空遮
断器。2. The vacuum circuit breaker according to claim 1, wherein the coupling mechanism is provided with guide means for guiding the operation of the movable shaft when the vacuum valve is opened at a high speed.
極時における可動軸の動作の衝撃を吸収する衝撃吸収手
段が設けられていることを特徴とする請求項１または２
に記載の真空遮断器。3. The coupling mechanism according to claim 1, wherein said coupling mechanism is provided with a shock absorbing means for absorbing a shock of operation of said movable shaft when said vacuum valve is opened at a high speed.
A vacuum circuit breaker according to item 1.
ンサおよびサイリスタスイッチを用いる回路を介して電
流を供給し、励磁させることを特徴とした請求項１、２
または３に記載の真空遮断器。4. An electromagnetic repulsion coil of the high-speed opening mechanism is supplied with a current through a circuit using a capacitor and a thyristor switch to be excited.
Or the vacuum circuit breaker according to 3.
ャップを開閉操作機構の可動部材のストロークにより調
整可能としてあることを特徴とする請求項１、２、３ま
たは４に記載の真空遮断器。5. The vacuum circuit breaker according to claim 1, wherein the gap of the vacuum electrode when the movable electrode is opened can be adjusted by the stroke of the movable member of the opening / closing operation mechanism. .
ルブの高速開極機構における電磁反発コイルを一括して
接続し、１つのサイリスタスイッチでその各電磁反発コ
イルを駆動することを特徴とする請求項１、２、３、４
または５に記載の真空遮断器。6. A plurality of vacuum valves, wherein electromagnetic repulsion coils in a high-speed opening mechanism of each vacuum valve are collectively connected, and each electromagnetic repulsion coil is driven by one thyristor switch. Claims 1, 2, 3, 4
Or the vacuum circuit breaker according to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10537599A JP3904756B2 (en) | 1999-04-13 | 1999-04-13 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10537599A JP3904756B2 (en) | 1999-04-13 | 1999-04-13 | Vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000299041A true JP2000299041A (en) | 2000-10-24 |
| JP3904756B2 JP3904756B2 (en) | 2007-04-11 |
Family
ID=14405953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10537599A Expired - Fee Related JP3904756B2 (en) | 1999-04-13 | 1999-04-13 | Vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3904756B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6373675B1 (en) * | 1999-01-14 | 2002-04-16 | Kabushiki Kaisha Toshiba | Operating apparatus for switching device |
| JP2003031087A (en) * | 2001-07-12 | 2003-01-31 | Mitsubishi Electric Corp | Electric power switch |
| JP2006079860A (en) * | 2004-09-07 | 2006-03-23 | Toshiba Corp | Control circuit of vacuum circuit breaker |
| JP2006236773A (en) * | 2005-02-24 | 2006-09-07 | Toshiba Corp | Circuit breaker |
| JP2007257902A (en) * | 2006-03-22 | 2007-10-04 | Mitsubishi Electric Corp | Solenoid operation switching device |
| US7911303B2 (en) | 2006-12-28 | 2011-03-22 | Hitachi, Ltd. | Circuit breaker and opening and closing method thereof |
| CN102262982A (en) * | 2011-06-30 | 2011-11-30 | 中国人民解放军海军工程大学 | High-speed contact driving mechanism of current-limiting breaker |
| CN101645376B (en) * | 2009-08-25 | 2012-01-25 | 北京四方华能电气设备有限公司 | Digitized intelligent rapid permanent-magnet breaker |
| WO2012086293A1 (en) * | 2010-12-20 | 2012-06-28 | 三菱電機株式会社 | Power switch device |
| CN101814394B (en) * | 2010-05-12 | 2013-04-10 | 宏秀电气有限公司 | Permanent-magnetic high-voltage vacuum circuit breaker |
| KR101342525B1 (en) | 2013-06-12 | 2013-12-17 | (주)서전기전 | Permanent magnetic actuator being able to control precision motion velocity |
| EP2871651A1 (en) * | 2013-11-06 | 2015-05-13 | LSIS Co., Ltd. | Circuit breaker |
| JP2015220228A (en) * | 2014-05-13 | 2015-12-07 | エルエス産電株式会社Lsis Co., Ltd. | Fast switch |
| JP2019110009A (en) * | 2017-12-18 | 2019-07-04 | 株式会社東芝 | Switch |
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|---|---|---|---|---|
| US6373675B1 (en) * | 1999-01-14 | 2002-04-16 | Kabushiki Kaisha Toshiba | Operating apparatus for switching device |
| JP2003031087A (en) * | 2001-07-12 | 2003-01-31 | Mitsubishi Electric Corp | Electric power switch |
| JP4667664B2 (en) * | 2001-07-12 | 2011-04-13 | 三菱電機株式会社 | Power switchgear |
| JP2006079860A (en) * | 2004-09-07 | 2006-03-23 | Toshiba Corp | Control circuit of vacuum circuit breaker |
| JP4592365B2 (en) * | 2004-09-07 | 2010-12-01 | 株式会社東芝 | Vacuum shut-off device control circuit |
| JP2006236773A (en) * | 2005-02-24 | 2006-09-07 | Toshiba Corp | Circuit breaker |
| JP2007257902A (en) * | 2006-03-22 | 2007-10-04 | Mitsubishi Electric Corp | Solenoid operation switching device |
| US7911303B2 (en) | 2006-12-28 | 2011-03-22 | Hitachi, Ltd. | Circuit breaker and opening and closing method thereof |
| CN101645376B (en) * | 2009-08-25 | 2012-01-25 | 北京四方华能电气设备有限公司 | Digitized intelligent rapid permanent-magnet breaker |
| CN101814394B (en) * | 2010-05-12 | 2013-04-10 | 宏秀电气有限公司 | Permanent-magnetic high-voltage vacuum circuit breaker |
| WO2012086293A1 (en) * | 2010-12-20 | 2012-06-28 | 三菱電機株式会社 | Power switch device |
| JP5150011B2 (en) * | 2010-12-20 | 2013-02-20 | 三菱電機株式会社 | Power switchgear |
| US9324521B2 (en) | 2010-12-20 | 2016-04-26 | Mitsubishi Electric Corporation | Power switchgear |
| CN102262982A (en) * | 2011-06-30 | 2011-11-30 | 中国人民解放军海军工程大学 | High-speed contact driving mechanism of current-limiting breaker |
| KR101342525B1 (en) | 2013-06-12 | 2013-12-17 | (주)서전기전 | Permanent magnetic actuator being able to control precision motion velocity |
| EP2871651A1 (en) * | 2013-11-06 | 2015-05-13 | LSIS Co., Ltd. | Circuit breaker |
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| US9431184B2 (en) | 2013-11-06 | 2016-08-30 | Lsis Co., Ltd. | Circuit breaker |
| CN104637746B (en) * | 2013-11-06 | 2017-04-12 | Ls产电株式会社 | Circuit breaker |
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| EP2947676B1 (en) * | 2014-05-13 | 2019-07-17 | LSIS Co., Ltd. | Fast switch |
| JP2019110009A (en) * | 2017-12-18 | 2019-07-04 | 株式会社東芝 | Switch |
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