JP5333253B2 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
JP5333253B2
JP5333253B2 JP2010009127A JP2010009127A JP5333253B2 JP 5333253 B2 JP5333253 B2 JP 5333253B2 JP 2010009127 A JP2010009127 A JP 2010009127A JP 2010009127 A JP2010009127 A JP 2010009127A JP 5333253 B2 JP5333253 B2 JP 5333253B2
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latch
plunger
circuit breaker
movable contact
contact
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JP2011150812A (en
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潤一 桧垣
晶 石川
進 高橋
治彦 下地
陽 牧田
淳 中川
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2010009127A priority Critical patent/JP5333253B2/en
Priority to CN201010268569.8A priority patent/CN102129941B/en
Priority to KR1020100118545A priority patent/KR101093850B1/en
Publication of JP2011150812A publication Critical patent/JP2011150812A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

A task of the invention is to settle easy arcing and circuit breaking performance if tripping circuit breaking time of a switch mechanism in a circuit breaker is longer and a movable contactor gets next to a contactor through the force generated by a compressed spring in a plunger and a reset spring of the movable contactor after the movable contactor is tripped compulsively through the plunger. The invention provides a circuit breaker which is composed of the following components: a plunger (31), an insulation rod (32), a movable contactor (4) which is provided with a movable contact (4b), a fixed contactor which is provided with a fixed contact (3b), a transverse rod, a pressure spring, a locking part, a latch, and a toggle rod mechanism, which form an instantaneous tripping part of the movable contactor. When the plunger (31) drives, through the impact between the locking part (21) and the latch (22), the rotation speed of the latch (22) is increased thereby shortening the tripping short-circuit time of the whole mechanism.

Description

この発明は回路遮断器、特に、回路遮断器の開閉機構部に関するものである。   The present invention relates to a circuit breaker, and more particularly to an opening / closing mechanism of the circuit breaker.

回路遮断器の開閉機構部として、例えば特許文献１に記載された従来の回路遮断器は、可動接触子を引き外すソレノイドはコイルとプランジャーからなり、短絡電流のような定格の数倍以上の電流がコイルに流れたとき、ソレノイド部の作動によりプランジャーの一端がまず引き外し金具を駆動してラッチリンク及び連結したリンクを外し、可動接触子を強制的に引外す。ラッチは、先に外れているため、リンク機構部が動作して、可動接触子が開極位置になるような動きにより開極動作を完了させる。   As a circuit breaker switching mechanism, for example, a conventional circuit breaker described in Patent Document 1 includes a coil and a plunger as a solenoid for tripping a movable contact, which is more than several times the rating such as a short circuit current. When the current flows through the coil, one end of the plunger is first driven by the operation of the solenoid part to drive the tripping metal to remove the latch link and the connected link, and forcibly trip the movable contact. Since the latch is disengaged first, the opening mechanism is completed by the movement of the link mechanism so that the movable contact is at the opening position.

特公昭５９−４２９３８号公報（第２−３頁、第１図）Japanese Examined Patent Publication No.59-42938 (page 2-3, FIG. 1)

開閉機構部がトリップ開極する全体の時間は、引き外し金具、ラッチリンク、連結したリンクの移動時間であり、各々の部品の慣性モーメント、質量、復帰ばね力などにより開閉機構部の開極時間が決まる。上述のような従来の回路遮断器の開閉機構部の構成では、可動接触子を強制的に引き外す時間に対してリンク機構部の開極時間が大きく遅れる。そのため、プランジャーで可動接触子を強制的に引き外した後、プランジャーを駆動していた電流が消失すると、プランジャーによる可動接触子の保持力がなくなり、プランジャー内の圧縮ばねや、可動接触子の復帰ばねによる力で、可動接触子が固定接触子に接近して再点弧が発生しやすくなるため、遮断性能が低下するという課題があった。   The total time for the opening / closing mechanism to open the trip is the travel time of the tripping bracket, latch link, and connected link. The opening time of the opening / closing mechanism depends on the moment of inertia of each part, mass, return spring force, etc. Is decided. In the configuration of the open / close mechanism of the conventional circuit breaker as described above, the opening time of the link mechanism is greatly delayed with respect to the time for forcibly removing the movable contact. Therefore, if the current that was driving the plunger disappears after forcibly removing the movable contact with the plunger, the holding force of the movable contact by the plunger disappears, and the compression spring inside the plunger The force of the contact spring of the contactor makes the movable contact approach the fixed contact and re-ignition is likely to occur, so that there is a problem that the interruption performance is lowered.

この発明は上記のような課題を解決するためになされたもので、トリップ時の開極時間を短縮し、遮断性能を向上させた回路遮断器を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a circuit breaker that shortens the opening time during tripping and improves the breaking performance.

この発明に係る回路遮断器は、短絡遮断時にプランジャー駆動および絶縁ロッドで可動接触子を開離後に、掛け金を駆動し、ラッチとの係合をはずした後、掛け金をラッチに接触させ回転トルクを与えることで、ラッチの回転速度を向上させる。   In the circuit breaker according to the present invention, when the short circuit is interrupted, the plunger is driven and the movable contact is opened by the insulating rod, the latch is driven, the latch is disengaged, the latch is brought into contact with the latch, and the rotational torque To increase the rotation speed of the latch.

この発明によれば、ラッチの回転速度を向上させることで、トリップ時の開極時間を短縮し、遮断性能を向上させた回路遮断器を得ることができる。   According to the present invention, by improving the rotation speed of the latch, it is possible to obtain a circuit breaker in which the opening time during trip is shortened and the breaking performance is improved.

この発明の実施の形態１における回路遮断器の外観を示す斜視図である。It is a perspective view which shows the external appearance of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のオン状態を示す側面断面図である。It is side surface sectional drawing which shows the ON state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１におけるオン状態の掛け金とラッチを含む開閉機構部の断面図である。It is sectional drawing of the opening-closing mechanism part containing the latch and latch of an ON state in Embodiment 1 of this invention. この発明の実施の形態１におけるトリップ開極瞬間の掛け金とラッチを含む開閉機構部の断面図である。It is sectional drawing of the opening-and-closing mechanism part containing the latch and latch of the trip opening instant in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のオン状態の掛け金とラッチの斜視図である。It is a perspective view of the latch and latch of the ON state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のトリップ開極瞬間の掛け金とラッチの斜視図である。It is a perspective view of a latch and a latch at the time of trip opening of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１の掛け金回転時にラッチへ接触することがない場合の主要開閉機構部品の動作タイミングを示すタイミングチャートである。It is a timing chart which shows the operation timing of the main opening-and-closing mechanism components when not contacting a latch at the time of latch rotation of Embodiment 1 of this invention. この発明の実施の形態１の掛け金回転時にラッチへ接触する場合の主要開閉機構部品の動作タイミングを示すタイミングチャートである。It is a timing chart which shows the operation timing of the main opening-and-closing mechanism components when contacting a latch at the time of latch rotation of Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のオン状態を示す開閉機構部の断面図である。It is sectional drawing of the switching mechanism part which shows the ON state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のオフ状態を示す開閉機構部の断面図である。It is sectional drawing of the switching mechanism part which shows the OFF state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のトリップ状態を示す開閉機構部の断面図である。It is sectional drawing of the switching mechanism part which shows the trip state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１における回路遮断器のリセット状態を示す開閉機構部の断面図である。It is sectional drawing of the switching mechanism part which shows the reset state of the circuit breaker in Embodiment 1 of this invention. この発明の実施の形態１におけるトリップ開極瞬間の掛け金とラッチの断面図である。It is sectional drawing of the latch and latch of the trip opening instant in Embodiment 1 of this invention. この発明の実施の形態１におけるリセット状態の掛け金とラッチの断面図である。It is sectional drawing of the latch and latch of the reset state in Embodiment 1 of this invention. この発明の実施の形態２による掛け金とラッチ折曲部のオン状態における斜視図である。It is a perspective view in the ON state of the latch and latch folding part by Embodiment 2 of this invention. この発明の実施の形態２による掛け金とラッチ折曲部のトリップ瞬間における斜視図である。It is a perspective view in the moment of a trip of a latch and latch bent part by Embodiment 2 of this invention.

実施の形態１．
図１はこの発明の実施の形態１における回路遮断器の外観を示す斜視図、図２はこの発明の実施の形態１における回路遮断器のオン状態を示す側面断面図、図３はこの発明の実施の形態１におけるオン状態の掛け金とラッチを含む開閉機構部の断面図、図４はこの発明の実施の形態１におけるトリップ開極瞬間の掛け金とラッチを含む開閉機構部の断面図、図５はこの発明の実施の形態１における回路遮断器のオン状態の掛け金とラッチの斜視図、図６はこの発明の実施の形態１における回路遮断器のトリップ開極瞬間の掛け金とラッチの斜視図である。 Embodiment 1 FIG.
1 is a perspective view showing an external appearance of a circuit breaker according to Embodiment 1 of the present invention, FIG. 2 is a side sectional view showing an ON state of the circuit breaker according to Embodiment 1 of the present invention, and FIG. FIG. 4 is a cross-sectional view of an opening / closing mechanism including a latch and a latch in an on state according to Embodiment 1, and FIG. FIG. 6 is a perspective view of the latch and latch of the circuit breaker in the on state according to the first embodiment of the present invention, and FIG. 6 is a perspective view of the latch and latch at the trip opening instant of the circuit breaker according to the first embodiment of the present invention. is there.

図１において、回路遮断器は、樹脂製のカバー１と樹脂製のベース２で覆われ、端子２４には配線を接続し、ハンドル１６により開閉操作がなされる構造となっている。   In FIG. 1, the circuit breaker is covered with a resin cover 1 and a resin base 2, and has a structure in which wiring is connected to a terminal 24 and an opening / closing operation is performed by a handle 16.

図２において、遮断器本体は樹脂製のカバー１と樹脂製のベース２で覆われ、固定接触子３には固定接点３ａが設けられている。固定接触子３に対向して配置される可動接触子４は、回転支点４ａを中心に回転可能になっており、回転によって固定接触子３と接離する。可動接触子４が固定接触子３に接触する際には、固定接触子３に設けられた固定接点３ａと可動接触子４に設けられた可動接点４ｂが接触するようになっている。消弧板５は、固定接触子３と可動接触子４付近に設けられ、可動接触子４を保持している絶縁クロスバー６には回転軸６ａが設けられている。下リンク９の図中右の端部は、絶縁クロスバー６と連結ピン８で結合されている。上リンク１１は、下リンク９と結合ピン１０で連結されており、結合ピン１０がヒンジ部となりトグルリンク機構を構成する。   In FIG. 2, the breaker body is covered with a resin cover 1 and a resin base 2, and a fixed contact 3 a is provided on the fixed contact 3. The movable contact 4 arranged to face the fixed contact 3 is rotatable around the rotation fulcrum 4a, and is brought into contact with and separated from the fixed contact 3 by rotation. When the movable contact 4 comes into contact with the fixed contact 3, the fixed contact 3 a provided on the fixed contact 3 and the movable contact 4 b provided on the movable contact 4 come into contact with each other. The arc extinguishing plate 5 is provided in the vicinity of the fixed contact 3 and the movable contact 4, and the rotating shaft 6 a is provided on the insulating cross bar 6 that holds the movable contact 4. The right end of the lower link 9 in the figure is connected to the insulating cross bar 6 and the connecting pin 8. The upper link 11 is connected to the lower link 9 by a connecting pin 10, and the connecting pin 10 serves as a hinge portion to constitute a toggle link mechanism.

レバー１３は、上リンク１１の一端部とレバー１３とを回転連結するためのバーリング加工による連結部１３ａで結合されている。軸１４はレバー１３の支点となり、レバー１３は軸１４を中心に回転する。開閉動作を行うハンドル１６のアーム部は、ハンドルアーム１５であり、支点１５ａを中心に回転する。結合ピン１０とハンドルアーム１５に設けられた引掛け部１５ｂとの間には、引張力を与える開閉ばね（図示しない）が張架されている。掛け金２１は、軸２１ａを支点にして、回転ばね２０により図中時計回り方向への付勢がなされている。   The lever 13 is connected by a connecting portion 13a by burring for rotationally connecting one end of the upper link 11 and the lever 13. The shaft 14 becomes a fulcrum of the lever 13, and the lever 13 rotates around the shaft 14. The arm portion of the handle 16 that performs the opening / closing operation is the handle arm 15 that rotates around the fulcrum 15a. An opening / closing spring (not shown) for applying a tensile force is stretched between the coupling pin 10 and a hooking portion 15b provided on the handle arm 15. The latch 21 is biased in the clockwise direction in the figure by the rotary spring 20 with the shaft 21a as a fulcrum.

ラッチ２２は回転軸２２ａ付近を中心に回転し、ラッチ２２の図中左端は掛け金２１と係合している。ラッチピン２２ｂは掛け金２１と少しのクリアランスを持つ位置に配置されている。端子２４は、可撓性を備えた導体２３、バイメタル部２５、コイル２６を介して固定接触子３に接続されている。同様に、端子２８は、可動接触子４に可撓性を備えた導体２７を介して接続されている。圧縮ばねを用いた接圧ばね２９で可動接触子４の可動接点４ｂに接圧を与えている。プランジャー３１、圧縮ばね３３、ヨーク３４、絶縁ロッド３２により可動接触子４を駆動し、可動接触子４の最大開極は、ストッパ３５で規制される。   The latch 22 rotates around the vicinity of the rotating shaft 22a, and the left end of the latch 22 in the drawing is engaged with the latch 21. The latch pin 22b is arranged at a position having a little clearance with the latch 21. The terminal 24 is connected to the fixed contact 3 via a flexible conductor 23, a bimetal portion 25, and a coil 26. Similarly, the terminal 28 is connected to the movable contact 4 via a conductor 27 having flexibility. A contact pressure spring 29 using a compression spring applies contact pressure to the movable contact 4 b of the movable contact 4. The movable contact 4 is driven by the plunger 31, the compression spring 33, the yoke 34, and the insulating rod 32, and the maximum opening of the movable contact 4 is regulated by the stopper 35.

次に動作について説明する。図２におけるオン状態において、下リンク９および上リンク１１は、結合ピン１０に作用する開閉ばねからの引張力により、連結部１３ａの回転中心と結合ピン１０の中心点とを結ぶ上リンク軸線と、連結ピン８の中心点と結合ピン１０の中心点とを結ぶ下リンク軸線とが、ほぼ一直線をなすように伸張されている。そして、クロスバー６は回転軸６ａを中心に図中時計回り方向の回転力を受け、可動接触子４を固定接触子３に押圧している。   Next, the operation will be described. In the ON state in FIG. 2, the lower link 9 and the upper link 11 are connected to the upper link axis that connects the rotation center of the coupling portion 13 a and the center point of the coupling pin 10 by the tensile force from the opening / closing spring acting on the coupling pin 10. The lower link axis connecting the center point of the connecting pin 8 and the center point of the connecting pin 10 extends so as to form a substantially straight line. The cross bar 6 receives a rotational force in the clockwise direction in the drawing around the rotation shaft 6 a and presses the movable contact 4 against the fixed contact 3.

図３のようなオン状態において、定格の数倍以上の短絡電流がコイル２６に流れると、プランジャー３１とヨーク３４の磁気回路により、プランジャー３１は図中右方向に移動を開始し、はじめにプランジャー３１の図中左端に設けられたＴ字状部３１ｂで掛け金２１を引っかけ、掛け金２１を図中反時計回り方向に回転させ、次いで絶縁ロッド３２の図中右端で可動接触子４を押して、可動接触子４を強制的に引き外す。   In the ON state as shown in FIG. 3, when a short-circuit current more than several times the rated value flows in the coil 26, the plunger 31 starts to move rightward in the figure by the magnetic circuit of the plunger 31 and the yoke 34. A latch 21 is hooked by a T-shaped portion 31b provided at the left end of the plunger 31 in the drawing, the latch 21 is rotated counterclockwise in the drawing, and then the movable contact 4 is pushed at the right end of the insulating rod 32 in the drawing. Then, the movable contact 4 is forcibly removed.

そして、図４のようにプランジャー３１とヨーク３４のギャップがなくなったところで、プランジャー３１に設けられた突起部３１ａがヨーク３４に引っかかり、プランジャー３１の図中右方向への移動はここで止まる。一方、可動接触子４は絶縁ロッド３２を介してプランジャー３１により加速されており、絶縁ロッド３２から離れるときの初速に対する運動エネルギーと、圧縮ばね２９を押し縮めるときに圧縮ばね２９に蓄積される位置エネルギーのバランスで、固定接触子３から開離していく。実際に短絡電流が発生したときには、プランジャー３１には瞬間的に大きな電磁力が発生し、絶縁ロッド３２を含めた移動速度による運動エネルギーが、圧縮ばね２９に蓄勢される位置エネルギーより十分に大きく、可動接触子４の速度は瞬間的に増大し、ほとんど速度低下することなく固定接触子３から開離していくことになる。   Then, when the gap between the plunger 31 and the yoke 34 disappears as shown in FIG. 4, the protrusion 31a provided on the plunger 31 is caught by the yoke 34, and the movement of the plunger 31 in the right direction in FIG. Stop. On the other hand, the movable contact 4 is accelerated by the plunger 31 through the insulating rod 32, and is stored in the compression spring 29 when the compression spring 29 is compressed and the kinetic energy with respect to the initial speed when leaving the insulating rod 32. It is separated from the stationary contact 3 by the balance of potential energy. When a short-circuit current is actually generated, a large electromagnetic force is instantaneously generated in the plunger 31, and the kinetic energy due to the moving speed including the insulating rod 32 is sufficiently larger than the potential energy stored in the compression spring 29. Largely, the speed of the movable contact 4 increases instantaneously, and the movable contact 4 is separated from the fixed contact 3 with almost no decrease in speed.

この間、掛け金２１とラッチ２２は、以下のような動作を行う。図５の位置からプランジャー３１により上述のように掛け金２１が回転駆動され、掛け金２１とラッチ２２の図中左端の係合が外れてラッチが回動自由になった後、掛け金２１の傾斜部２１ｂが、ラッチ２２のラッチピン２２ｂに接触することで、ラッチ２２に強制回転力を与える。そして、ラッチ２２が高速回転して図６のような状態となる。なお、上記接触の際に、ラッチピン２２ｂは傾斜部２１ｂに設けられた凹部に入り込むようになっている。その後、図２においてラッチ係合部２２ｃとレバー１３の係合が外れ、レバー１３は軸１４を中心に図中時計回り方向に回転することで、トグルリンク機構はＬ字状に屈曲され、クロスバー６は図中反時計回り方向に回転駆動されトリップ動作する。   During this time, the latch 21 and the latch 22 perform the following operations. The latch 21 is rotated by the plunger 31 from the position shown in FIG. 5 as described above. After the latch 21 and the latch 22 are disengaged from each other at the left end in FIG. When 21 b comes into contact with the latch pin 22 b of the latch 22, a forced rotational force is applied to the latch 22. Then, the latch 22 rotates at a high speed and becomes in a state as shown in FIG. At the time of the contact, the latch pin 22b enters the recess provided in the inclined portion 21b. Thereafter, in FIG. 2, the latch engagement portion 22c and the lever 13 are disengaged, and the lever 13 rotates about the shaft 14 in the clockwise direction in the drawing, so that the toggle link mechanism is bent in an L shape, The bar 6 is driven to rotate in the counterclockwise direction in the figure and trips.

以上、この発明の実施の形態１に係る回路遮断器は、掛け金２１がラッチ２２と接触し回転トルクを与えることでラッチ２２の回転速度を向上させ、開閉機構部のトリップ動作時間を短縮させることができる。   As described above, in the circuit breaker according to Embodiment 1 of the present invention, the latch 21 is brought into contact with the latch 22 to apply the rotational torque, thereby improving the rotational speed of the latch 22 and shortening the trip operation time of the opening / closing mechanism. Can do.

次に、この発明の実施の形態１に係る回路遮断器において、開閉機構部のトリップ動作時間が短縮される点について、図７及び図８を用いて詳しく説明する。図７は従来の回路遮断器のように掛け金が回転時にラッチへ接触することがない場合の主要開閉機構部品の動作タイミングの例を示すタイミングチャート、図８はこの発明の実施の形態１の掛け金が回転時にラッチへ接触する場合の主要開閉機構部品の動作タイミングの例を示すタイミングチャートである。   Next, in the circuit breaker according to Embodiment 1 of the present invention, the point that the trip operation time of the switching mechanism is shortened will be described in detail with reference to FIGS. FIG. 7 is a timing chart showing an example of the operation timing of the main switching mechanism parts when the latch does not contact the latch during rotation as in a conventional circuit breaker, and FIG. 8 is a latch according to the first embodiment of the present invention. It is a timing chart which shows the example of the operation timing of main opening-and-closing mechanism components in case it contacts a latch at the time of rotation.

図７に示すように、定格の数倍以上の短絡電流がコイル２６に流れると、プランジャー３１の移動は瞬間的に行われ、プランジャー３１の変位ｘはΔt1a=1〜2msの短い期間で素早く変化する。プランジャー３１の移動途中で掛け金２１は、プランジャー３１により回転駆動されるので、回転角（掛け金角度）が増加していく。掛け金２１が回転するとラッチ２２との係合がはずれ、ラッチ２２の回転角（ラッチ角度）も増加していく。ラッチ２２が回転すると先に説明したような方法で、レバー１３、トグルリンク機構が回転動作し、クロスバー６の開極動作がなされ、クロスバーの回転角（クロスバー角度）も増加していく。   As shown in FIG. 7, when a short-circuit current more than several times the rated value flows through the coil 26, the plunger 31 is moved instantaneously, and the displacement x of the plunger 31 is a short period of Δt1a = 1 to 2 ms. Change quickly. Since the latch 21 is rotationally driven by the plunger 31 during the movement of the plunger 31, the rotation angle (the latch angle) increases. When the latch 21 rotates, the engagement with the latch 22 is released, and the rotation angle (latch angle) of the latch 22 also increases. When the latch 22 rotates, the lever 13 and the toggle link mechanism rotate by the method described above, the opening operation of the crossbar 6 is performed, and the rotation angle (crossbar angle) of the crossbar also increases. .

ここで、ラッチ２２とレバー１３の係合がはずれるまでは、トグルリンク機構はトリップ動作せず、クロスバー６の開極が行われない。ラッチ２２の開極時間は、開閉ばねによりレバー１３から受けている力とラッチ２２の慣性モーメントにより決まり、ここではラッチ２２の回転完了時間はΔt2a=4msであり、その後、上記途中のトグルリンク機構のトリップ動作がなされ、結局クロスバー６が開極するまでの時間はΔt3a=8msとなる。   Here, until the latch 22 and the lever 13 are disengaged, the toggle link mechanism does not trip and the cross bar 6 is not opened. The opening time of the latch 22 is determined by the force received from the lever 13 by the opening and closing spring and the moment of inertia of the latch 22. Here, the rotation completion time of the latch 22 is Δt2a = 4 ms. The trip time until the crossbar 6 is finally opened is Δt3a = 8 ms.

そこで、掛け金２１の回転後に、ラッチ２２に回転力を与えると、ラッチ２２が回転完了するまでの時間を短縮させ、全体の開極時間を向上させることができる。ラッチ２２にラッチピン２２ｂを追加した場合、先に説明したように、掛け金２１からの回転力がラッチ２２へ伝達される。これにより、図８のように、ラッチ移動時間が例えばΔt2b=2msに短縮されると、上記途中のリンク機構のトリップ動作が開始されるタイミングは早まり、クロスバー６が開極するまでの時間はΔt3b=6msに短縮される。   Therefore, when a rotational force is applied to the latch 22 after the latch 21 is rotated, the time until the latch 22 is completely rotated can be shortened, and the overall opening time can be improved. When the latch pin 22 b is added to the latch 22, the rotational force from the latch 21 is transmitted to the latch 22 as described above. As a result, as shown in FIG. 8, when the latch movement time is shortened to Δt2b = 2 ms, for example, the timing of starting the trip operation of the intermediate link mechanism is advanced, and the time until the crossbar 6 is opened is Δt3b = 6 ms.

次に、回路遮断器のオン状態、オフ状態、トリップ状態、リセット状態のそれぞれに移行するときの開閉機構部の動作について説明する。図９はこの発明の実施の形態１における回路遮断器のオン状態を示す開閉機構部の断面図、図１０はこの発明の実施の形態１における回路遮断器のオフ状態を示す開閉機構部の断面図、図１１はこの発明の実施の形態１における回路遮断器のトリップ状態を示す開閉機構部の断面図、図１２はこの発明の実施の形態１における回路遮断器のリセット状態におけるを示す開閉機構部の断面図、図１３はこの発明の実施の形態１におけるトリップ開極瞬間の掛け金とラッチの断面図、図１４はこの発明の実施の形態１におけるリセット状態の掛け金とラッチの断面図である。   Next, the operation of the switching mechanism when the circuit breaker transitions to the on state, the off state, the trip state, and the reset state will be described. FIG. 9 is a cross-sectional view of the switching mechanism portion showing the on state of the circuit breaker in Embodiment 1 of the present invention, and FIG. 10 is a cross section of the switching mechanism portion showing the off state of the circuit breaker in Embodiment 1 of the present invention. FIG. 11 is a sectional view of the switching mechanism showing the trip state of the circuit breaker according to the first embodiment of the present invention. FIG. 12 is a switching mechanism showing the circuit breaker in the reset state according to the first embodiment of the present invention. FIG. 13 is a sectional view of the latch and latch at the trip opening instant in Embodiment 1 of the present invention, and FIG. 14 is a sectional view of the latch and latch in the reset state in Embodiment 1 of the present invention. .

図９に示すオン状態においては、先に説明したように、クロスバー６は回転軸６ａを中心とした図中時計回り方向の回転力を受けており、可動接触子４を固定接触子３に押圧している。   In the on state shown in FIG. 9, as described above, the cross bar 6 receives the rotational force in the clockwise direction in the drawing centering on the rotation shaft 6 a, and the movable contact 4 becomes the fixed contact 3. Pressing.

図１０に示すオフ状態においては、オン状態からハンドル１６を図中反時計回り方向に回転させた場合であり、結合ピン１０とハンドルアーム１５に設けられた引掛け部１５ｂの間に、引張力を与える開閉ばねが張架されているため、このばね力線の作用によりクロスバー６は回転軸６ａを中心に図中反時計回り方向に回転力を受け、可動接触子４は固定接触子３から開離する状態となる。   The off state shown in FIG. 10 is a case where the handle 16 is rotated counterclockwise in the figure from the on state, and a tensile force is applied between the coupling pin 10 and the hook portion 15b provided on the handle arm 15. Since the open / close spring that provides the tension is stretched, the action of the spring force line causes the crossbar 6 to receive a rotational force in the counterclockwise direction around the rotation shaft 6a, and the movable contact 4 is fixed to the fixed contact 3. It will be in a state of being released from.

図９に示すオン状態に短絡電流が流れると、先に説明したように、コイル２６、プランジャー３１、ヨーク３４からなる短絡電流検出装置により、掛け金２１が軸２１ａを中心に図中反時計回り方向に回転することで、ラッチ２２との係合がはずれ、ラッチ２２は図中時計回り方向に回転し始める。さらに、レバー１３との係合がはずれ、開閉ばねの引張力が上リンク１１を介して作用することにより軸１４を中心に図中時計回り方向に回転する。それに伴って、上リンク１１と下リンク９はハンドル１６の下側でＬ字状に屈曲され、クロスバー６は図９の図中反時計回り方向に回動駆動され、図１１に示すトリップ状態となる(この一連の動作をまとめてトリップ動作と呼ぶ)。   When a short-circuit current flows in the ON state shown in FIG. 9, as described above, the latch 21 is rotated counterclockwise around the shaft 21a by the short-circuit current detecting device including the coil 26, the plunger 31, and the yoke 34. By rotating in the direction, the engagement with the latch 22 is released, and the latch 22 starts to rotate in the clockwise direction in the figure. Further, the engagement with the lever 13 is disengaged, and the pulling force of the opening / closing spring acts via the upper link 11 to rotate clockwise around the shaft 14 in the figure. Accordingly, the upper link 11 and the lower link 9 are bent in an L shape on the lower side of the handle 16, and the cross bar 6 is driven to rotate in the counterclockwise direction in FIG. 9, and the trip state shown in FIG. (This series of operations is collectively called a trip operation).

また、図１１に示すトリップ状態からハンドル１６を把持して図中反時計回り方向に回動操作すると、ハンドルアーム１５は同様に図中反時計回り方向に駆動され、開閉ばねによる作用によりレバー１３は軸１４を中心に図中反時計回り方向に回動する。そして、回転ばね２０の作用力によりラッチ２２は図中反時計回り方向に、掛け金２１は図中時計回り方向に回転して所定の位置に戻り、レバー１３とラッチ２２とが係合し、ラッチ２２と掛け金２１とが係合し、図１２に示すリセット状態となる（リセット動作）。ここで、ラッチピン２２ｂはラッチ２２が図中反時計回り方向に回転するとき、図６に示すように掛け金２１の傾斜部２１ｂの凹部に入り込んでいるが、リセット動作をすると回転ばね２０の作用により掛け金２１が図中時計回り方向、ラッチ２２が図中反時計回り方向にそれぞれ回転力を受けるのに加え、ラッチピン２２ｂが掛け金２１の傾斜部２１ｂへ接触することで掛け金２１を回転するアシスト力になり回転を与える。   Further, when the handle 16 is gripped from the trip state shown in FIG. 11 and rotated counterclockwise in the figure, the handle arm 15 is similarly driven counterclockwise in the figure, and the lever 13 is actuated by the action of the opening / closing spring. Rotates about the shaft 14 in the counterclockwise direction in the figure. Then, the latch 22 rotates counterclockwise in the figure and the latch 21 rotates clockwise in the figure due to the acting force of the rotary spring 20, and the lever 13 and the latch 22 engage with each other. 22 and the latch 21 are engaged, and the reset state shown in FIG. 12 is established (reset operation). Here, when the latch 22 rotates counterclockwise in the drawing, the latch pin 22b enters the recess of the inclined portion 21b of the latch 21 as shown in FIG. In addition to the latch 21 receiving a rotational force in the clockwise direction in the drawing and the latch 22 in the counterclockwise direction in the drawing, the latch pin 22b comes into contact with the inclined portion 21b of the latch 21 to provide an assist force for rotating the latch 21. Give a turn.

また、ラッチピン２２ｂと掛け金２１ｂは、図１３のような位置関係であり、リセット動作時に干渉しない位置に工夫されており、リセット完了時には図１４のような位置関係となる。このような動作をすることで、機構のリセット動作を行い、ハンドルの作用力をなくすると、図１０のオフ状態となる。   Further, the latch pin 22b and the latch 21b are in a positional relationship as shown in FIG. 13, and are devised so as not to interfere with each other during the reset operation, and are in a positional relationship as shown in FIG. 14 when the reset is completed. By performing such an operation, when the mechanism is reset and the operating force of the handle is lost, the state shown in FIG. 10 is turned off.

このオフ状態からハンドル１６を把持して図中反時計回り方向に回動操作すると、開閉ばねが上リンク軸線を下から上に通過する死点を境に、結合ピン１０に張架された開閉ばねの作用力の方向が再び反転し、上リンクと下リンクが伸張されるスナップ動作によりクロスバー６が図中時計回り方向に回動駆動されて、可動接触子４を固定接触子３に押圧し、図９のオン状態となる。   When the handle 16 is gripped from this OFF state and rotated counterclockwise in the figure, the opening / closing spring stretched around the connecting pin 10 at the dead point passing through the upper link axis from the bottom to the top. The direction of the acting force of the spring is reversed again, and the cross bar 6 is driven to rotate in the clockwise direction in the drawing by a snap operation in which the upper link and the lower link are extended, and the movable contact 4 is pressed against the fixed contact 3. Then, the ON state of FIG. 9 is obtained.

本実施の形態によれば、プランジャー３１の駆動の際に掛け金２１の傾斜部２１ｂにラッチピン２２ｂが接触し、ラッチ２２の回転速度が向上するので、開閉機構部全体のトリップ開極の時間を短縮され遮断性能が向上する。   According to the present embodiment, when the plunger 31 is driven, the latch pin 22b comes into contact with the inclined portion 21b of the latch 21, and the rotation speed of the latch 22 is improved. Shortened and improved blocking performance.

実施の形態２．
図１５はこの発明の実施の形態２による掛け金２１とラッチ折曲部のオン状態における斜視図、図１６はこの発明の実施の形態３による掛け金とラッチ折曲部のトリップ瞬間における斜視図である。実施の形態１と同一の構成については同一の番号を付して説明を省略する。 Embodiment 2. FIG.
FIG. 15 is a perspective view of the latch 21 and latch bent portion according to the second embodiment of the present invention in an on state, and FIG. 16 is a perspective view of the latch and latch bent portion according to the third embodiment of the present invention when the trip occurs. . The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

上記ラッチ２２に折曲部２２ｄを設け、掛け金２１の傾斜部２１ｂが、ラッチ２２のラッチピン２２ｂに衝突し、実施の形態１で説明したように同様な作用と効果を得られる。さらに、折曲部２２ｄはラッチ２２の折曲加工で一体に形成できるため組み立ての手間を省き、製作コストを低下させる効果も得られる。   The bent portion 22d is provided in the latch 22, and the inclined portion 21b of the latch 21 collides with the latch pin 22b of the latch 22, and the same operation and effect can be obtained as described in the first embodiment. Further, since the bent portion 22d can be integrally formed by bending the latch 22, it is possible to save the assembling work and to reduce the manufacturing cost.

３ 固定接触子、３ａ 固定接点、４ 可動接触子、４ａ 回転支点、４ｂ 可動接点、６ クロスバー、６ａ 回転軸、１３ レバー、２１ 掛け金、２２ ラッチ、２６ コイル、２９ 圧縮ばね、３１ プランジャー、３２ 絶縁ロッド、３３ 圧縮ばね、３４ ヨーク。   3 fixed contact, 3a fixed contact, 4 movable contact, 4a rotating fulcrum, 4b movable contact, 6 crossbar, 6a rotating shaft, 13 lever, 21 latch, 22 latch, 26 coil, 29 compression spring, 31 plunger, 32 Insulating rod, 33 Compression spring, 34 Yoke.

Claims (3)

可動接点を有する可動接触子と、
前記可動接点と接離する固定接点と、
前記固定接点と電気的に接続し電流が通電されるコイルと、
前記コイルに短絡電流が通電された際に駆動されるプランジャーと、
前記プランジャーの一端に接続され前記プランジャーの駆動に伴って前記可動接触子を押して前記固定接点から引き外す絶縁ロッドと、
前記プランジャーの駆動に伴って駆動される掛け金と、
前記掛け金の駆動により前記掛け金との係合が外れ回動自由となるラッチと、
前記ラッチの回動により前記ラッチによる係合が外れ駆動するトグルリンク機構と、
前記トグルリンク機構からの駆動力により回転して前記可動接触子を駆動させる絶縁クロスバーと、
を備えた回路遮断器において、
前記掛け金が前記プランジャーの駆動に伴って駆動される際に、前記掛け金が前記ラッチに接触し、前記ラッチへ回転トルクを与えることを特徴とする回路遮断器。 A movable contact having a movable contact;
A fixed contact contacting and moving away from the movable contact;
A coil electrically connected to the fixed contact and energized with current;
A plunger that is driven when a short-circuit current is applied to the coil;
An insulating rod that is connected to one end of the plunger and pushes the movable contact with the driving of the plunger to disengage it from the fixed contact;
A latch that is driven as the plunger is driven;
A latch that is disengaged from the latch by driving the latch and is freely rotatable;
A toggle link mechanism that is disengaged and driven by rotation of the latch;
An insulating crossbar that rotates by the driving force from the toggle link mechanism to drive the movable contact;
In a circuit breaker with
When the latch is driven according to the driving of the plunger, wherein the latch is in contact with the latch, circuit breaker, characterized in Rukoto given rotational torque to the latch. 前記ラッチにラッチピンが設けられ、前記掛け金が接触する部分がこのラッチピンであることを特徴とする請求項１に記載の回路遮断器。   2. The circuit breaker according to claim 1, wherein a latch pin is provided in the latch, and a portion where the latch contacts is the latch pin. 前記ラッチに一体の折曲部が設けられ、前記掛け金が接触する部分がこの折曲部であることを特徴とする請求項１に記載の回路遮断器。   2. The circuit breaker according to claim 1, wherein the latch is provided with an integral bent portion, and a portion with which the latch contacts is the bent portion.
JP2010009127A 2010-01-19 2010-01-19 Circuit breaker Active JP5333253B2 (en)

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JP2010009127A JP5333253B2 (en) 2010-01-19 2010-01-19 Circuit breaker
CN201010268569.8A CN102129941B (en) 2010-01-19 2010-08-30 Circuit breaker
KR1020100118545A KR101093850B1 (en) 2010-01-19 2010-11-26 Circuit breaker

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CN102436984B (en) * 2011-12-26 2014-01-15 法泰电器（江苏）股份有限公司 Breaker rapid disjunction device
JP6395676B2 (en) * 2015-07-31 2018-09-26 三菱電機株式会社 Circuit breaker
US11348753B2 (en) * 2017-12-01 2022-05-31 Mitsubishi Electric Corporation Contactor having fixed and movable iron cores and a movable contact
GB2602968A (en) * 2021-01-20 2022-07-27 Eaton Intelligent Power Ltd Moving contact oscillating damper

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JPS53114078A (en) * 1977-03-15 1978-10-05 Matsushita Electric Works Ltd Wiring breaker
JPH0824021B2 (en) * 1988-06-08 1996-03-06 三菱電機株式会社 Circuit breaker switching mechanism
JPH04190521A (en) * 1990-11-26 1992-07-08 Hitachi Ltd Breaker for wiring
JP3503396B2 (en) * 1997-03-06 2004-03-02 三菱電機株式会社 Circuit breaker
KR100831709B1 (en) 2007-02-27 2008-05-22 동아전기공업 주식회사 Trip device for circuit breaker

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KR101093850B1 (en) 2011-12-13
KR20110085857A (en) 2011-07-27
JP2011150812A (en) 2011-08-04
CN102129941A (en) 2011-07-20

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