JPH0760624B2 - Vacuum circuit breaker - Google Patents
Vacuum circuit breakerInfo
- Publication number
- JPH0760624B2 JPH0760624B2 JP3359789A JP3359789A JPH0760624B2 JP H0760624 B2 JPH0760624 B2 JP H0760624B2 JP 3359789 A JP3359789 A JP 3359789A JP 3359789 A JP3359789 A JP 3359789A JP H0760624 B2 JPH0760624 B2 JP H0760624B2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum valve
- circuit breaker
- vacuum
- rod
- latch
- 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.)
- Expired - Fee Related
Links
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は真空バルブを用いた真空遮断器に係り、特に、
電気鉄道車両に搭載するのに好適な真空遮断器に関す
る。The present invention relates to a vacuum circuit breaker using a vacuum valve, and in particular,
The present invention relates to a vacuum circuit breaker suitable for mounting on an electric railway vehicle.
従来の真空遮断器（真空開閉装置）は第９図に示すよう
に、複雑な駆動機構部100で発生した開極力を複数個の
リンク101を介して方向転換せしめ、絶縁継手102にて真
空バルブ103を開極する構成になつている。真空バルブ1
03は一体成形された絶縁支持枠104にて真空バルブ103の
み覆う構造である。また、前記駆動機構部100は金属製
箱105に収納されている。As shown in FIG. 9, the conventional vacuum circuit breaker (vacuum switchgear) changes the opening force generated in the complicated drive mechanism section 100 through a plurality of links 101, and a vacuum valve is formed by an insulating joint 102. It is designed to open 103. Vacuum valve 1
03 is a structure in which only the vacuum valve 103 is covered by an integrally formed insulating support frame 104. The drive mechanism unit 100 is housed in a metal box 105.
なお、この種の装置として関連するものには例えば特公
昭62−26529号公報等があげられる。A device related to this type is, for example, Japanese Patent Publication No. 62-26529.
上記従来技術は、複雑なリンク機構を用いて真空バルブ
を開極する引外し機構と開極状態を保持するロツク機構
とを構成しているために、部品数が多くなり、その分信
頼性に問題があつた。In the above-mentioned conventional technology, since the trip mechanism for opening the vacuum valve and the lock mechanism for holding the open state are configured by using the complicated link mechanism, the number of parts is increased and the reliability is increased accordingly. There was a problem.
本発明の目的は、小形で信頼性を高めることができる真
空遮断器を提供することにある。An object of the present invention is to provide a vacuum circuit breaker that is small in size and can improve reliability.
上記目的は、ロック機構は真空バルブと連動する係合部
を機械的に係合する係合体を軸支しており、この係合体
の前記軸支点及び前記係合部との係合位置と、引外し機
構及び投入機構の作動中心とを前記真空バルブの軸心上
に配置すると共に、前記引外し機構と前記投入機構の作
動方向を前記真空バルブの軸心と平行にしたことにより
達成される。The above-mentioned object is that the lock mechanism pivotally supports an engaging body that mechanically engages an engaging portion that interlocks with a vacuum valve, and the shaft fulcrum of the engaging body and an engaging position with the engaging portion, It is achieved by disposing the trip mechanism and the operating center of the closing mechanism on the axis of the vacuum valve, and making the operating directions of the trip mechanism and the closing mechanism parallel to the axis of the vacuum valve. .
上記構成によれば、直線状の配置となるので、開及び閉
極の動作が一方向になるので、構造が単純化して小形化
でき、その結果ストローク損失が減少し、かつ真空バル
ブの開極状態をこの真空バルブの軸心上で機械的に安定
して保持できるので、信頼性を向上することができる。According to the above-mentioned configuration, since the arrangement is linear, the opening and closing operations are in one direction, so the structure can be simplified and downsized, and as a result, stroke loss is reduced, and the opening and closing of the vacuum valve is reduced. Since the state can be maintained mechanically stably on the axis of this vacuum valve, the reliability can be improved.
以下、本発明の一実施例を第１図から第６図により説明
する。左右に間隔をあけて配置した一対の絶縁支持板１
及び２を設け、この絶縁支持板1,2の上部に固定端子支
持体３を挟持している。この固定端子支持体３にはコネ
クタ４の一端が固定され、他端は前記絶縁支持板1,2に
支持された別の支持体9aにボルト11aによつて固定され
る。また、前記コネクタ４には真空バルブ５の固定端子
部（図示せず）が固持されており、また真空バルブ５の
可動端子5aには可動コネクタ７が連結されている。この
可動コネクタ７は両側にスライダー6,6を備え、前記絶
縁支持板1,2に固設した支持体８の案内溝8aによつて摺
動支持される。また可動コネクター７には可撓導体９が
接続され、この可撓導体９は前記絶縁支持板1,2に固設
した支持体10に端子ボルト11にて締付けられている。An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. A pair of insulating support plates 1 arranged with a space left and right
And 2 are provided, and the fixed terminal support 3 is sandwiched between the insulating support plates 1 and 2. One end of the connector 4 is fixed to the fixed terminal support 3, and the other end is fixed to another support 9a supported by the insulating support plates 1 and 2 by a bolt 11a. A fixed terminal portion (not shown) of the vacuum valve 5 is fixed to the connector 4, and a movable connector 7 is connected to a movable terminal 5a of the vacuum valve 5. This movable connector 7 is provided with sliders 6, 6 on both sides and is slidably supported by a guide groove 8a of a support body 8 fixed to the insulating support plates 1, 2. A flexible conductor 9 is connected to the movable connector 7, and the flexible conductor 9 is fastened with a terminal bolt 11 to a support body 10 fixed to the insulating support plates 1 and 2.
さらに、真空バルブ５の可動端子5aには真空バルブの軸
心と一致するロツド12が直結している。このロツド12を
挿通して、引外し機構を構成する反発コイル13と短絡リ
ング14が位置している。この反発コイル13は前記絶縁支
持板1,2に支持され、前記短絡リング14の中心は前記ロ
ツド12に固設した受け板15に支持されている。さらに、
前記ロツド12は前記真空バルブ５を開極させる投入機構
である閉極ばね16の中心を挿通している。この閉極ばね
16の上端は前記受け板15に当接し、端部は前記絶縁支持
板1,2に固設された支持体17に当接して反抗している。
ロツド12の下端は前記支持体17をさらに貫通し、軸心Ｂ
の線上に係合部を構成するローラ18が軸支されている。
このローラ18と対向する位置にラツチ19が軸19aにて回
動支持されている。この軸19aは前記支持体17に支持さ
れている。またラツチ19は、ロツクばね20の一端を当接
して常時ローラ18を押圧している。ロツクばね20の他端
部は支持体21にて支持されている。この支持体21は前記
支持体17に支持されている。この支持体21に設けられた
ストツパーボルト22はラツチ19が非ロツク状態での位置
決めである。第１図及び第２図は真空バルブ５が開極し
ている状態を示している。従つて、ロツド12は弾性スト
ツパー23に制止されている。Further, a rod 12 which coincides with the axis of the vacuum valve is directly connected to the movable terminal 5a of the vacuum valve 5. The repulsion coil 13 and the short-circuit ring 14 forming the tripping mechanism are located through the rod 12. The repulsion coil 13 is supported by the insulating support plates 1 and 2, and the center of the short-circuit ring 14 is supported by a receiving plate 15 fixed to the rod 12. further,
The rod 12 is inserted through the center of a closing spring 16 which is a closing mechanism for opening the vacuum valve 5. This closing spring
The upper end of 16 is in contact with the receiving plate 15, and the end is in contact with the support 17 fixed to the insulating support plates 1 and 2 to repel it.
The lower end of the rod 12 further penetrates the support 17, and the axis B
A roller 18 constituting an engaging portion is axially supported on the line.
A latch 19 is rotatably supported by a shaft 19a at a position facing the roller 18. The shaft 19a is supported by the support 17. The latch 19 abuts one end of the lock spring 20 to constantly press the roller 18. The other end of the lock spring 20 is supported by the support 21. The support 21 is supported by the support 17. The stopper bolt 22 provided on the support body 21 is for positioning the latch 19 in a non-locking state. 1 and 2 show a state in which the vacuum valve 5 is open. Therefore, the rod 12 is restrained by the elastic stopper 23.
連動補助接点24,25は、ラツチ19に固持した操作板26に
て押圧している。次に、閉極状態にするメカニズムを説
明する。前記ロツド12の下端にほぼ対向して位置し、リ
セツト電磁コイル27,固定鉄心28,ヨーク29,可動鉄心30,
戻しばね31,絶縁操作ロツド32より構成されるプランジ
ヤー形の電磁駆動部は、支持体33にて支持され、支持体
32は前記絶縁支持板1,2にて挟持されている。The interlocking auxiliary contacts 24, 25 are pressed by the operation plate 26 fixed to the latch 19. Next, the mechanism for making the closed state will be described. Located almost opposite to the lower end of the rod 12, the reset electromagnetic coil 27, the fixed iron core 28, the yoke 29, the movable iron core 30,
A plunger type electromagnetic drive unit composed of a return spring 31 and an insulating operation rod 32 is supported by a support body 33,
32 is sandwiched between the insulating support plates 1 and 2.
ここで上記構成の真空遮断器の動作を説明すると、リセ
ツト電磁コイル27が励磁されると、可動鉄心30が戻しば
ね31に反抗し、絶縁操作ロツド32と共に固定鉄心28に電
磁吸引し、このとき絶縁操作ロツド32（第２図）の先端
でラツチ19を押す。押されたラツチ19はラツチ軸19aを
中心としてロツクばね20に逆らつて反時計へ回動し、ロ
ツク状態を維持していたローラ18との係合が外されて、
閉極状態へ、閉極ばね16の力で切替る。Explaining the operation of the vacuum circuit breaker having the above configuration, when the reset electromagnetic coil 27 is excited, the movable iron core 30 resists the return spring 31 and electromagnetically attracts the fixed iron core 28 together with the insulating operation rod 32. Push the latch 19 with the tip of the insulation operation rod 32 (Fig. 2). The pushed latch 19 turns counterclockwise around the latch shaft 19a counter to the locking spring 20 and is disengaged from the roller 18 maintaining the locked state,
Switching to the closed state by the force of the closing spring 16.
さて、次に、高速度開極状態のメカニズムを説明す。閉
極状態（第６図参照）は、反発コイル13と短絡リング14
は接近している。この状態にて、反発コイル13が、コン
デンサー（図示なし）などに蓄積しておいた電荷にて数
100アンペア〜数1000アンペアなる電流にて励磁する
と、短絡リング14は前記閉極ばね16に逆らつて電磁反発
力にて瞬時に軸心Ｂの線上で下降する。このとき受け板
15と一体のロツド12も下降せしめ、ラツチ19はロツクば
ね20の押し力により、時計方向へ回動し、下降したロツ
ド12の下端のローラ18と係合し、開極状態をロツク保持
する（第５図）。このとき、ローラ18とラツチ19との係
合位置及びラッチ19の軸19aとが前記真空バルブ５の軸
心Ｂの線上にあるので、仮にロッド12に上向きの力が作
用したとしても、ラッチ19を反時計方向に回転させるよ
うな分力は作用せず、安定して真空バルブ５の開極を保
持することができる。Now, next, the mechanism of the high-speed open state will be described. In the closed state (see Fig. 6), the repulsion coil 13 and the short-circuit ring 14
Is approaching. In this state, the repulsion coil 13 is charged by the charge accumulated in the capacitor (not shown) etc.
When excited by a current of 100 amperes to several thousand amperes, the short-circuiting ring 14 is instantly lowered along the axis B by an electromagnetic repulsive force against the closing pole spring 16. At this time the backing plate
The rod 12 integrated with 15 is also lowered, and the latch 19 is rotated in the clockwise direction by the pushing force of the lock spring 20 to engage with the roller 18 at the lower end of the lowered rod 12 to hold the open contact state with the lock ( (Fig. 5). At this time, since the engagement position between the roller 18 and the latch 19 and the shaft 19a of the latch 19 are on the line of the axis B of the vacuum valve 5, even if an upward force is applied to the rod 12, the latch 19 is actuated. The component force that rotates the counterclockwise direction does not act, and the opening of the vacuum valve 5 can be stably maintained.
上記実施例によれば、リンク機構などの複雑なメカニズ
ムがなく、引外し機構やロツク機構の作動部を軸線上に
配置したので、装置の小形化が行なえ、しかもリンク機
構による軸受のガタつきやリンクの微少な撓みによるス
トローク損失さらには真空バルブ５の開極状態を崩すよ
うなことはなくなるので、第５図及び第６図に示す数ミ
リメートルのギヤツプG1が正確に、しかも単純な構成で
実現できるので信頼性が向上する。According to the above-mentioned embodiment, since there is no complicated mechanism such as a link mechanism and the operating portions of the trip mechanism and the lock mechanism are arranged on the axis, the device can be downsized, and the rattling of the bearing due to the link mechanism and Stroke loss due to slight bending of the link and the open state of the vacuum valve 5 will not be disrupted, so the few millimeters of the gear G1 shown in Figs. 5 and 6 can be realized accurately and with a simple structure. As a result, reliability is improved.
また、軸心上に配置された各部品の両端を一対の絶縁支
持板1,2で支持する、いわゆる両端支持構造となるの
で、力学上、剛性の高い構造となり、装置全体の強度上
の信頼性が高くなる効果がある。In addition, since both ends of each component arranged on the axis are supported by a pair of insulating support plates 1 and 2, it is a so-called both-ends supporting structure, so it has a mechanically high rigidity structure and reliability of the strength of the entire device. There is an effect that the property becomes high.
さらに、真空バルブ５の可動端子5aは極めて高速度で開
極させるため、真空バルブ５の金属製ベローズ（図示な
し）が軸心Ｂからずれる動作をくり返すと機械的損傷を
受け破壊するまでの回数寿命が減少するが、第３図，第
４図に示すように、スライダー６の厚み方向と、それに
直角なスライダー６の外周方向を夫々支持体８の溝8aに
て摺動案内することにより、軸心ＢからみたＸ方向及び
Ｙ方向を摺動的拘束することにより、軸心Ｂに対する振
れが抑止されるので、寿命に対する信頼性が高まる効果
がある。Furthermore, since the movable terminal 5a of the vacuum valve 5 is opened at an extremely high speed, if the metal bellows (not shown) of the vacuum valve 5 is repeatedly deviated from the axis B, it will be damaged by mechanical damage until it is destroyed. Although the cycle life is reduced, as shown in FIG. 3 and FIG. 4, by slidingly guiding the slider 6 in the thickness direction of the slider 6 and the outer peripheral direction of the slider 6 at right angles thereto by the groove 8a of the support body 8, respectively. By slidably restraining the X-direction and the Y-direction viewed from the shaft center B, the shake with respect to the shaft center B is suppressed, so that there is an effect that reliability for life is increased.
このほか、第１図にあおける閉極ばね16は、そのばねの
巻き直径が大きく、この中心側にロツド12を挿通するこ
とにより、全体構成としての高さ形状寸法を低くするこ
とができるので、コンパクト化となる効果がある。In addition, the closing spring 16 shown in FIG. 1 has a large winding diameter, and by inserting the rod 12 at the center side, the height and dimension of the entire structure can be reduced. There is an effect that it becomes compact.
次に、第７図，第８図について説明する。第７図，第８
図の構成は、第５図，第６図に示す構成と同じである
が、ラツチ19に傾斜した突部19bを設けた点が異なる。
即ちロツド12の下端に設けたローラ18が下降したとき
に，ラツチ19に設けた前記突部19bの傾斜面19cにローラ
18が接触し、ラツチ19を強制的に時計方向に回動させ
る。これにより、可動物体であるラツチ19,操作板26,連
動補助接点24,25を夫々慣性質量に影響されずに回動で
き高速度（開極時間で0.5ミリ秒）開極させる場合に極
めて有効，確実なロツク動作が出来る。また、突部19b
はこの傾斜面19cとローラ18の外周に対し所要ギヤツプG
2を設けて、ラツチ19に対してロツク作用が機械的に干
渉しないようにする必要性は当然ながら施される。また
突部19bは弾性体にて構成することも前記干渉を制止す
るに効果がある。以上のように本発明によればより高速
度開極に対するロツクが確実に行うことのできる効果が
ある。Next, FIGS. 7 and 8 will be described. 7 and 8
The structure shown in the figure is the same as the structure shown in FIGS. 5 and 6, except that the latch 19 is provided with an inclined projection 19b.
That is, when the roller 18 provided at the lower end of the rod 12 descends, the roller is attached to the inclined surface 19c of the protrusion 19b provided on the latch 19.
18 makes contact and forces the latch 19 to rotate clockwise. As a result, the movable object such as the latch 19, the operation plate 26, and the interlocking auxiliary contacts 24 and 25 can be rotated without being affected by the inertial mass, respectively, and are extremely effective when opening at a high speed (opening time 0.5 ms). ， It is possible to perform a reliable lock operation. Also, the protrusion 19b
Is the required gear gap G with respect to the inclined surface 19c and the outer circumference of the roller 18.
The need to provide 2 so that the locking action does not mechanically interfere with the latch 19 is of course provided. The protrusion 19b made of an elastic material is also effective in suppressing the interference. As described above, according to the present invention, there is an effect that the locking with respect to the high speed opening can be surely performed.
尚、上記各実施例は、開極を電磁力を利用して駆動する
ものであるが、駆動源は空気圧，油圧を利用することも
できる。In each of the above-mentioned embodiments, the opening is driven by using electromagnetic force, but the driving source may be pneumatic pressure or hydraulic pressure.
以上説明したように本発明によれば、小形にして高信頼
性の真空遮断器を提供することができる。As described above, according to the present invention, it is possible to provide a compact and highly reliable vacuum circuit breaker.
第１図は本発明の一実施例を示す真空遮断器を示す正面
図、第２図は第１図の一部破断右側面図、第３図は第１
図のスライダーの周辺を示す縦断拡大正面図、第４図は
第３図のＡ−Ａ線に沿う拡大断面図、第５図及び第６図
は第２図の要部構成の動作を説明する側面図、第７図及
び第８図は夫々第５図及び第６図に相当する本発明の他
の実施例を示す側面図、第９図は従来の真空開閉装置の
要部を示す側面図である。 1,2……絶縁支持板、５……真空バルブ、６……スライ
ダー、12……ロツド、13……反発コイル、14……短絡リ
ング、16……閉極用ばね、18……ローラ、19……ラツ
チ、19b……ラツチ突部、20……反抗ばね。FIG. 1 is a front view showing a vacuum circuit breaker showing an embodiment of the present invention, FIG. 2 is a right side view of a partially broken view of FIG. 1, and FIG.
A vertical enlarged front view showing the periphery of the slider in the figure, FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG. 3, and FIGS. 5 and 6 explain the operation of the main part configuration of FIG. A side view, FIGS. 7 and 8 are side views showing another embodiment of the present invention corresponding to FIGS. 5 and 6, respectively, and FIG. 9 is a side view showing a main part of a conventional vacuum switchgear. Is. 1,2 ... Insulation support plate, 5 ... Vacuum valve, 6 ... Slider, 12 ... Rod, 13 ... Repulsion coil, 14 ... Short-circuit ring, 16 ... Closing spring, 18 ... Roller, 19 ... Latch, 19b ... Latch protrusion, 20 ... Reaction spring.
Claims (7)
と、前記真空バルブを開極状態に保持するロック機構
と、前記真空バルブを閉極させる投入機構とを備えた真
空遮断器において、前記ロック機構は前記真空バルブと
連動する係合部を機械的に係合する係合体を軸支してお
り、この係合体の前記軸支点及び前記係合部との係合位
置と、前記引外し機構及び前記投入機構の作動中心とを
前記真空バルブの軸心上に配置すると共に、前記引外し
機構と前記投入機構の作動方向を前記真空バルブの軸心
と平行にしたことを特徴とする真空遮断器。1. A vacuum circuit breaker comprising a tripping mechanism for instantly opening a vacuum valve, a lock mechanism for holding the vacuum valve in an open state, and a closing mechanism for closing the vacuum valve. The lock mechanism pivotally supports an engagement body that mechanically engages an engagement portion that interlocks with the vacuum valve, and an engagement position between the engagement body and the shaft fulcrum and the engagement portion. The removal mechanism and the operating center of the closing mechanism are arranged on the axis of the vacuum valve, and the operating directions of the tripping mechanism and the closing mechanism are parallel to the axis of the vacuum valve. Vacuum circuit breaker.
て前記真空バルブを瞬時に開極させる引外し機構と、前
記真空バルブを開極状態に保持するロック機構と、前記
真空バルブを閉極させる投入機構とを備えた真空遮断器
において、前記引外し機構と前記投入機構とは、夫々前
記ロッドを囲んで配置されていると共に、このロッドを
前記軸心上に沿って駆動するように構成されており、か
つ前記ロック機構は前記ロッドに設けた係合部を前記軸
心上で機械的に係合する係合体を軸支しており、この係
合体の軸支点を前記軸心上に一致させたことを特徴とす
る真空遮断器。2. A trip mechanism for instantaneously opening the vacuum valve via a rod provided on the axis of the vacuum valve, a lock mechanism for holding the vacuum valve in the open state, and the vacuum valve. In a vacuum circuit breaker having a closing mechanism for closing a pole, the tripping mechanism and the closing mechanism are arranged so as to surround the rod, respectively, and drive the rod along the axis. And the lock mechanism pivotally supports an engaging body that mechanically engages the engaging portion provided on the rod on the axial center, and the axial fulcrum of this engaging body is the axial center. Vacuum circuit breaker characterized by matching the above.
置された電磁コイルと、前記電磁コイルの磁力を受けて
前記ロッドを駆動する短絡リングとを有することを請求
項２記載の特徴とする真空遮断器。3. The trip mechanism according to claim 2, wherein the trip mechanism includes an electromagnetic coil arranged around the rod, and a short-circuit ring that receives the magnetic force of the electromagnetic coil and drives the rod. Vacuum circuit breaker.
コイルであることを請求項３記載の特徴とする真空遮断
器。4. The vacuum circuit breaker according to claim 3, wherein the electromagnetic coil is a repulsion coil that generates a repulsive force.
チであり、また前記ロック機構は前記ラッチの係合部と
の係合状態を保持するロックばねを有し、かつ前記ラッ
チは前記係合部の押圧動作によって前記ラッチを前記係
合部との係合方向に回動させる機構を設けたことを特徴
とする請求項２記載の真空遮断器。5. An engaging body of the lock mechanism is a pivotally supported latch, and the lock mechanism has a lock spring that holds an engaged state with an engaging portion of the latch, and the latch is the The vacuum circuit breaker according to claim 2, further comprising a mechanism for rotating the latch in a direction in which the latch is engaged with the engaging portion by a pressing operation of the engaging portion.
置されていることを特徴とする請求項1,2,3,4,又は５記
載の真空遮断器。6. The vacuum circuit breaker according to claim 1, wherein each of the parts is arranged between a pair of insulating support members.
れ止め機構を備えていることを特徴とする請求項６記載
の真空遮断器。7. The vacuum circuit breaker according to claim 6, wherein the movable portion of the vacuum valve is provided with a steady rest mechanism with respect to the shaft center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3359789A JPH0760624B2 (en) | 1989-02-15 | 1989-02-15 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3359789A JPH0760624B2 (en) | 1989-02-15 | 1989-02-15 | Vacuum circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02215021A JPH02215021A (en) | 1990-08-28 |
| JPH0760624B2 true JPH0760624B2 (en) | 1995-06-28 |
Family
ID=12390898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3359789A Expired - Fee Related JPH0760624B2 (en) | 1989-02-15 | 1989-02-15 | Vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760624B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013216018B4 (en) | 2013-08-13 | 2021-06-02 | Siemens Aktiengesellschaft | Device for transmitting forces |
| KR101918237B1 (en) * | 2017-03-28 | 2018-11-13 | 엘에스산전 주식회사 | High-speed switch |
-
1989
- 1989-02-15 JP JP3359789A patent/JPH0760624B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02215021A (en) | 1990-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |