TWI401719B - air circuit breaker - Google Patents
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- TWI401719B TWI401719B TW97130012A TW97130012A TWI401719B TW I401719 B TWI401719 B TW I401719B TW 97130012 A TW97130012 A TW 97130012A TW 97130012 A TW97130012 A TW 97130012A TW I401719 B TWI401719 B TW I401719B
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Description
本發明係關於空氣斷路器的開閉接點部之技術。The present invention relates to a technique of opening and closing a contact portion of an air circuit breaker.
在習知的空氣斷路器中，為了抑制斷路動作時的接點消耗，在具有與固定接點接觸/分離(以下亦稱「接離」)的第1接點之可動件係設有與固定側弧接觸件(arcing contact)接離之可動側弧接觸件，當接點分離時，透過開閉機構轉動可動件，以使可動側弧接觸件接觸固定側弧接觸件，而在使第1接點與固定接點分離後，再使可動側弧接觸件與固定側弧接觸件分離的空氣斷路器已為人所知(參照例如專利文獻1)。In the conventional air circuit breaker, in order to suppress the contact consumption at the time of the disconnection operation, the movable member having the first contact with the fixed contact contact/separation (hereinafter also referred to as "separation") is provided and fixed. The arcing contact is connected to the movable side arc contact member. When the contact is separated, the movable member is rotated by the opening and closing mechanism, so that the movable side arc contact member contacts the fixed side arc contact member, and the first connection is made. An air circuit breaker that separates the movable side arc contact from the fixed side arc contact after the point is separated from the fixed contact is known (refer to, for example, Patent Document 1).
(專利文獻1)國際公開WO2003/071566號公報第2至3頁，第1圖。(Patent Document 1) International Publication No. WO2003/071566, pages 2 to 3, and Fig. 1.
然而，由於上述之可動件係透過呈U字狀的可撓導體以可移動的方式連接於固定導體，因此例如在流通有像短路電流之類的大電流於可撓導體時，將會在可撓導體的兩片間產生電磁推斥力。所以，在藉開閉機構轉動可動件之前，會因為上述的電磁推斥力使可動件往固定側弧接觸件之方向轉動，使可動側弧接觸件和固定側弧接觸件接觸。然後，在該可動側弧接觸件和固定側弧接觸件接觸之後，因固定側弧接觸件已被固定，所以可動件也就無法再轉 動。因此，在可動件會以可動側弧接觸件和固定側弧接觸件的接觸點作為支點，而產生轉動力朝令第1接點與固定接點打開之方向的作用，而不必要地將第1接點從固定接點打開。結果在兩接點間產生發弧，以致有接點消耗而無法維持通電性能之問題。However, since the movable member is movably connected to the fixed conductor through the U-shaped flexible conductor, for example, when a large current such as a short-circuit current flows through the flexible conductor, An electromagnetic repulsive force is generated between the two pieces of the flexural conductor. Therefore, before the movable member is rotated by the opening and closing mechanism, the movable member is rotated in the direction of the fixed side arc contact member due to the electromagnetic repulsive force, so that the movable side arc contact member and the fixed side arc contact member are in contact. Then, after the movable side arc contact member and the fixed side arc contact member are in contact, since the fixed side arc contact member has been fixed, the movable member cannot be rotated any more. move. Therefore, in the movable member, the contact point of the movable side arc contact member and the fixed side arc contact member is used as a fulcrum, and the rotational force is generated toward the direction in which the first contact point and the fixed contact point are opened, and the second portion is unnecessarily 1 contact opens from the fixed contact. As a result, arcing occurs between the two contacts, so that there is a problem that the contacts are consumed and the energization performance cannot be maintained.
再者，由於接點間的發弧將會流通較通常為多的短路電流於可動側弧接觸件和固定側弧接觸件的接觸點，因此亦有引起可動側弧接觸件和固定側弧接觸件熔接之虞。Moreover, since the arcing between the contacts will circulate more frequent short-circuit currents at the contact points of the movable side arc contact member and the fixed side arc contact member, the movable side arc contact member and the fixed side arc contact are also caused to be contacted. Pieces of welding.
本發明係為解決上述問題而研創出者，其目的在於消除發生大電流時之開閉機構進行動作前的兩接點間之發弧，獲得通電性能良好之空氣斷路器。The present invention has been made in order to solve the above problems, and an object thereof is to eliminate an arcing between two contacts before an opening and closing mechanism is operated when a large current is generated, and to obtain an air circuit breaker having good electric conduction performance.
本發明之空氣斷路器係具備：接觸臂，藉開閉機構部將一端作為支點而被轉動；可動件，被該接觸臂可轉動地支持，並於一端具有第1接點及第1弧接觸件；第1導體，具有可與前述第1接點接離的第2接點；第2弧接觸件，與該第1導體電性連接，且可接離地隔以間隙與前述第1弧接觸件相對向配置；推壓手段，設於前述可動件的另一端，對前述兩接點間賦予接觸壓力；以及可撓導體，一片連接於前述可動件的另一端，另一片連接於第2導體，且呈大致U字狀；於藉由前述開閉機構部使接點分離時，係使前述第1弧接觸件與前述第2弧接觸件接觸，並在使前述第1接點與前述第2接點分離後，使前述第1弧接觸件與前述第2弧接觸件分離，其中，於發生大電流時，在藉由前述開閉機構部使接點分離前，利用產生在前述可撓導 體之兩片間的電磁推斥力轉動前述可動件，藉此，前述第1弧接觸件係進行移動，該第1弧接觸件係接觸前述第2弧接觸件，前述第2弧接觸件係對應前述第1弧接觸件的移動而動作，而於與前述第1弧接觸件接觸之狀態下，以允許前述第1弧接觸件移動的方式進行位移，且具備支持手段，係以允許前述第2弧接觸件位移的方式支持前述第2弧接觸件。The air circuit breaker of the present invention includes: a contact arm that is rotated by an opening and closing mechanism portion as a fulcrum; the movable member is rotatably supported by the contact arm, and has a first contact and a first arc contact at one end The first conductor has a second contact that is connectable to the first contact; the second arc contact is electrically connected to the first conductor, and is separably spaced apart from the first arc by a gap The pressing means is disposed at the other end of the movable member to apply a contact pressure between the two contacts; and the flexible conductor, one piece is connected to the other end of the movable member, and the other piece is connected to the second conductor And when the contact is separated by the opening and closing mechanism portion, the first arc contact is brought into contact with the second arc contact, and the first contact and the second After the contact is separated, the first arc contact is separated from the second arc contact, and when a large current is generated, the flexible guide is generated before the contact is separated by the opening and closing mechanism. The electromagnetic repulsive force between the two pieces rotates the movable member, whereby the first arc contact member moves, the first arc contact member contacts the second arc contact member, and the second arc contact member corresponds to The first arc contact member is moved to move, and in a state of being in contact with the first arc contact member, the first arc contact member is allowed to move so as to be movable, and a support means is provided to allow the second The manner in which the arc contact is displaced supports the aforementioned second arc contact.
依據本發明，由於係設成：當發生大電流時，在接點因前述開閉機構部而分離前，利用產生在前述可撓導體之兩片間的電磁推斥力轉動前述可動件，藉此，前述第1弧接觸件係進行移動，該第1弧接觸件係接觸前述第2弧接觸件，前述第2弧接觸件係對應前述第1弧接觸件的移動而動作，而於與前述第1弧接觸件接觸之狀態下，以允許前述第1弧接觸件移動的方式進行位移，故不會有兩接點間的發弧，而能獲得通電性能良好的空氣斷路器。According to the present invention, when a large current is generated, the movable member is rotated by an electromagnetic repulsive force generated between the two pieces of the flexible conductor before the contact is separated by the opening and closing mechanism portion, whereby the movable member is rotated. The first arc contact member moves, the first arc contact member contacts the second arc contact member, and the second arc contact member operates in response to movement of the first arc contact member, and the first arc contact member In the state in which the arc contact is in contact, the displacement of the first arc contact member is allowed to be performed, so that there is no arcing between the two contacts, and an air circuit breaker having good electric conduction performance can be obtained.
第1圖係表示本發明第1實施形態之空氣斷路器導通(on)狀態之側剖面圖，第2圖係表示其開閉接點部之上剖面圖，第3圖係通電部之透視斜視圖，第4圖係斜線圈彈簧(coil spring)的斜視圖，第5圖係表示開閉動作途中的開閉接點部側剖面圖，第6圖係其斷開(off)狀態之側剖面圖，第7圖係表示發生大電流時的開閉接點部之側剖面圖。在第1圖中，空氣斷路器100係由開閉接點部200及 開閉機構部300所構成。開閉接點部200係收納在由以絕緣材料的基座(base)1a及中基座1b所構成之基座框體1，並具有：屬於第1導體的電源側導體2，係於基座1a並設有該空氣斷路器的極數個，且一端導出至基座框體1的內面外部；第2接點(固定接點)3，固接在電源側導體2之另一端；可動件5，一端固接有與第2接點3相對向且可接離的第1接點(可動接點)4；接觸臂(contact arm)7，與開閉機構部300連結，且藉可動件銷(pin)6以可轉動的方式支持可動件5；以及接觸臂軸8，將接觸臂7支撐在基座框體1。如第2圖所示，各極的可動件5係每一極由6個可動件片5a、5b、5c、5d、5e、5f構成，並在各個可動件片5a至5f設有第1接點4。再者，對可動件片5a至5c設有接觸臂7a，對可動件片5d至5f設有接觸臂7b，並對應可動件片5a至5c設有第2接點3a，對應可動件片5d至5f設有第2接點3b。1 is a side cross-sectional view showing an air circuit breaker in an ON state according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the opening and closing contact portion thereof, and FIG. 3 is a perspective oblique view of the energizing portion. 4 is a perspective view of a coil spring, and FIG. 5 is a cross-sectional view of the opening and closing contact portion in the middle of the opening and closing operation, and FIG. 6 is a side sectional view showing the off state. 7 is a side cross-sectional view showing an open/close contact portion when a large current is generated. In the first diagram, the air circuit breaker 100 is connected and closed by the contact unit 200 and The opening and closing mechanism unit 300 is configured. The opening and closing contact portion 200 is housed in a base frame 1 composed of a base 1a and an intermediate base 1b made of an insulating material, and has a power source side conductor 2 belonging to the first conductor, and is attached to the base. 1a is provided with a plurality of poles of the air circuit breaker, and one end is led out to the outside of the inner surface of the base frame 1; the second contact (fixed contact) 3 is fixed to the other end of the power source side conductor 2; a member 5 is fixed at one end with a first contact (movable contact) 4 that is opposite to the second contact 3 and is detachable; a contact arm 7 is coupled to the opening and closing mechanism portion 300, and the movable member is attached A pin 6 rotatably supports the movable member 5; and a contact arm shaft 8 that supports the contact arm 7 in the base frame 1. As shown in Fig. 2, the movable member 5 of each pole is composed of six movable pieces 5a, 5b, 5c, 5d, 5e, and 5f for each pole, and the first connection is provided for each of the movable pieces 5a to 5f. Point 4. Further, the movable piece pieces 5a to 5c are provided with the contact arm 7a, the movable piece pieces 5d to 5f are provided with the contact arm 7b, and the movable piece pieces 5a to 5c are provided with the second contact point 3a, corresponding to the movable piece piece 5d. The second contact 3b is provided to 5f.
再者，於各可動件片5a至5f的一端係分別延長其導體設有第1弧接觸件9，且與形狀呈塊狀的第2弧接觸件10隔以預定間隙以可接離之方式相對向配置。該第2弧接觸件10係橫跨各第1弧接觸件9而延長，並由一對支持手段A、B支持其兩端。該支持手段A、B均如第2及3圖所示，由下述元件所構成：固定金屬件11，固定且電性連接在電源側導體2；斜線圈彈簧12(亦即彈性構件)，以被壓縮的狀態介設在該固定金屬件11及第2弧接觸件10之間，且如第4圖所示地將斜捲繞的導線成形為環狀；以及 可動銷13，移動自如地貫穿基座1a、固定金屬件11和斜線圈彈簧12且鎖緊在第2弧接觸件10，且具有防止脫落用的頭部；第2弧接觸件10係經介斜線圈彈簧12及固定金屬件11而與電源側導體2電性連接。Further, at each end of each of the movable piece pieces 5a to 5f, the first arc contact member 9 is extended by the conductor, and the second arc contact piece 10 having a block shape is separated by a predetermined gap to be detachable. Relative configuration. The second arc contact 10 is extended across the first arc contacts 9 and supported by a pair of support means A, B. As shown in FIGS. 2 and 3, the support means A and B are composed of the following elements: a fixed metal member 11, fixedly and electrically connected to the power source side conductor 2, and a skew coil spring 12 (that is, an elastic member). Interposed between the fixed metal member 11 and the second arc contact 10 in a compressed state, and the obliquely wound wire is formed into a ring shape as shown in FIG. 4; The movable pin 13 is movably inserted through the base 1a, the fixed metal member 11 and the skew coil spring 12, and is locked to the second arc contact 10, and has a head for preventing falling off; the second arc contact 10 is a medium The skew coil spring 12 and the fixed metal member 11 are electrically connected to the power source side conductor 2 .
於各可動件片5a至5f的另一端係分別設有接觸壓彈簧14(亦即推壓手段)，以可動件銷6為槓桿支點向兩接點間賦予接觸壓力。而且，在該各壓力彈簧14與各可動件片5a至5f的連接部係分別連接有將薄板導體疊層而成的可撓導體15之一片，而其另一片則連接至負荷側導體16(即第2導體)。如圖所示，該等可撓導體15係形成為從與負荷側導體16的連接部開始朝開閉機構部300方向延長的往後屈曲之大致U字狀，並配設成使發生大電流時產生在可撓導體15之兩片間的電磁推斥力作為令第1弧接觸件9與第2弧接觸件10接觸之方向的轉動力，而作用於可動件5。At the other end of each of the movable piece pieces 5a to 5f, a contact pressure spring 14 (i.e., a pressing means) is provided, and the movable member pin 6 is used as a lever fulcrum to apply a contact pressure between the two contacts. Further, a connecting piece of each of the pressure springs 14 and the movable piece pieces 5a to 5f is connected to one piece of the flexible conductor 15 in which the thin plate conductors are laminated, and the other piece is connected to the load side conductor 16 ( That is, the second conductor). As shown in the figure, the flexible conductors 15 are formed in a substantially U-shape which is extended from the connection portion with the load-side conductor 16 in the direction of the opening and closing mechanism portion 300, and is arranged such that a large current is generated. The electromagnetic repulsive force generated between the two pieces of the flexible conductor 15 acts as a rotational force in a direction in which the first arc contact 9 and the second arc contact 10 come into contact with each other, and acts on the movable member 5.
再者，於接觸臂7的一部分設有阻止可動件5往不必要的部位轉動之擋銷17。更且在第1弧接觸件9與第2弧接觸件10的上部設有誘引產生在第1弧接觸件9與第2弧接觸件10間的發弧並予以消弧之消弧裝置18。Further, a stopper pin 17 for preventing the movable member 5 from rotating to an unnecessary portion is provided in a part of the contact arm 7. Further, an arc extinguishing device 18 that induces arcing between the first arc contact member 9 and the second arc contact member 10 and arcs out is provided on the upper portion of the first arc contact member 9 and the second arc contact member 10.
接著說明動作。Next, the operation will be described.
首先，說明投入動作。First, the input operation will be described.
藉由蓄積在投入彈簧19c的彈簧力，開閉機構部300係將接觸臂7壓下，如此一來可動件5被朝向順時鐘方向轉動，首先第1弧接觸件9與第2弧接觸件10接觸而形成 可通電。藉由開閉機構部300更進一步的壓入，而在第1弧接觸件9與第2弧接觸件10維持在接觸的狀態下，將第1接點4按壓接觸在第2接點3。當更進一步將開閉機構部300壓入時，可動件5被朝向逆時鐘方向轉動，使第1弧接觸件9從第2弧接觸件10離開，通電移到第1接點4與第2接點3，空氣斷路器即成導通狀態。在導通狀態下，第1接點4與第2接點3雖接觸，但第1弧接觸件9與第2弧接觸件10係隔以預定間隙而分離。The opening and closing mechanism portion 300 presses the contact arm 7 by the spring force accumulated in the input spring 19c, so that the movable member 5 is rotated in the clockwise direction, first the first arc contact member 9 and the second arc contact member 10 Formed by contact Can be powered. When the opening and closing mechanism unit 300 is further pressed, the first contact 4 is pressed into contact with the second contact 3 while the first arc contact 9 and the second arc contact 10 are kept in contact. When the opening and closing mechanism unit 300 is further pushed in, the movable member 5 is rotated in the counterclockwise direction, and the first arc contact 9 is separated from the second arc contact 10, and is energized to move to the first contact 4 and the second connection. Point 3, the air circuit breaker is turned on. In the on state, the first contact 4 and the second contact 3 are in contact with each other, but the first arc contact 9 and the second arc contact 10 are separated by a predetermined gap.
接著說明斷路動作。Next, the disconnection operation will be described.
於發生過電流時，當因檢測過電流而使跳脫繼電器動作時，伴隨開閉機構部300所致的開始接觸臂7之上拉動作，可動件5會因壓力彈簧14的彈推力而以可動件銷6為中心朝順時鐘方向轉動，如第5圖所示，第1弧接觸件9係接觸到第2弧接觸件10。在這時間點電流開始並行地流通於兩接點間及第1弧接觸件9與第2弧接觸件10的接觸點。透過開閉機構部300更進一步的上拉動作，第1接點4從第2接點3略為離開，在兩接點間產生電弧引起的通電。若開閉機構部300的上拉動作更進一步地進行，則第1弧接觸件9與第2弧接觸件10的接觸點會維持在抵接的狀態，第1接點4則從第2接點3大幅地離開，而使發生在接點間的電弧大幅被拉長。由於該電弧之拉長，電弧電阻增大而使電流的主流移動到第1弧接觸件9與第2弧接觸件10的接觸點。當開閉機構部300再進一步進行開動作時，則可動件5的轉動會受到擋銷17之限制，而如第6 圖所示，使第1弧接觸件9與第2弧接觸件10的接觸點產生分離。然後，產生在第1弧接觸件9與第2弧接觸件10之間的電弧即被誘引到消弧室18而被消弧。When an overcurrent occurs, when the tripping relay is operated by detecting an overcurrent, the movable member 5 is movable by the spring force of the pressure spring 14 in response to the start of the pulling action of the contact arm 7 by the opening and closing mechanism unit 300. The pin 6 is rotated in the clockwise direction, and as shown in Fig. 5, the first arc contact 9 is in contact with the second arc contact 10. At this point in time, current begins to flow in parallel between the two contacts and the contact point between the first arc contact 9 and the second arc contact 10. When the opening and closing mechanism unit 300 further pulls up, the first contact 4 is slightly separated from the second contact 3, and electric conduction due to the arc is generated between the two contacts. When the pull-up operation of the opening and closing mechanism unit 300 is further performed, the contact point between the first arc contact 9 and the second arc contact 10 is maintained in abutment state, and the first contact 4 is from the second contact point. 3 leaves largely, and the arc that occurs between the contacts is greatly elongated. Due to the elongation of the arc, the arc resistance increases to cause the main flow of current to move to the contact point of the first arc contact 9 and the second arc contact 10. When the opening and closing mechanism unit 300 further performs the opening operation, the rotation of the movable member 5 is restricted by the stopper pin 17, and is the sixth. As shown in the figure, the contact point between the first arc contact 9 and the second arc contact 10 is separated. Then, the arc generated between the first arc contact 9 and the second arc contact 10 is induced to the arc extinguishing chamber 18 to be arc-extinguished.
另一方面，例如在發生像短路電流之類的大電流時，因該大電流而產生在各可撓導體15的電磁推斥力係作為使接點接觸壓增加的轉動力而作用於可動件5，且相對於開閉機構部300，與作用於兩接點間的電磁推斥力一樣地，作用成將可動件5往開閉機構部300的方向推回。因此，即使在開閉機構部300的動作前，開閉機構部300亦會朝抬起接觸臂7的方向產生彈性變形，使可動件銷6朝開閉機構部300方向位移。而且，可動件5形成可朝順時鐘方向轉動，將第1弧接觸件9轉動到與第2弧接觸件10接觸為止(與第5圖相同狀態)。在第1弧接觸件9與第2弧接觸件10接觸之後，以該接觸點作為支點使轉動力朝第1接點4與第2接點3張開的方向作用於可動件5，惟如第7圖所示，因第1弧接觸件9的按壓動作而使第2弧接觸件10將斜線圈彈簧12壓扁而位移。On the other hand, for example, when a large current such as a short-circuit current occurs, the electromagnetic repulsive force generated in each of the flexible conductors 15 due to the large current acts on the movable member 5 as a rotational force that increases the contact pressure of the contact. The opening and closing mechanism unit 300 acts to push the movable member 5 back toward the opening and closing mechanism unit 300 in the same manner as the electromagnetic repulsive force acting between the two contacts. Therefore, even before the operation of the opening and closing mechanism unit 300, the opening and closing mechanism unit 300 is elastically deformed in the direction in which the contact arm 7 is lifted, and the movable member pin 6 is displaced in the direction of the opening and closing mechanism unit 300. Further, the mover 5 is formed to be rotatable in the clockwise direction, and the first arc contact 9 is rotated until it comes into contact with the second arc contact 10 (the same state as in FIG. 5). After the first arc contact 9 comes into contact with the second arc contact 10, the contact point acts as a fulcrum to apply the rotational force to the movable member 5 in a direction in which the first contact 4 and the second contact 3 are opened, for example, As shown in Fig. 7, the second arc contact 10 collapses and displaces the helical coil spring 12 by the pressing operation of the first arc contact 9.
之後，當跳脫繼電器作動時，藉開閉機構部300上拉接觸臂7。伴隨此上拉，第1接點4略從第2接點3開離，兩接點間即形成電弧所造成的通電。藉由開閉機構部300更進一步的上拉動作，在第1弧接觸件9與第2弧接觸件10維持接觸之下，第1接點4從第2接點3大幅地離開，產生在接點間的電弧即被大幅拉長。由於電弧的拉長，電弧電阻增大使電流之主流移往第1弧接觸件9與第2弧接 觸件10。當開閉機構部300更進一步進行開動作時，可動件5的轉動受到擋銷17的限制，如第6圖所示，第1弧接觸件9與第2弧接觸件10的接觸點被分離。然後，產生在第1弧接觸件9與第2弧接觸件10之間的電弧被誘引到消弧室18而被消弧。此時，第2弧接觸件10因未受到來自第1弧接觸件9的按壓力，故藉斜線圈彈簧12的復原力被推回到確保與各第1弧接觸件9的原有間隙位置為止。Thereafter, when the tripping relay is actuated, the contact arm portion 7 is pulled up by the opening and closing mechanism portion 300. With this pull-up, the first contact 4 is slightly separated from the second contact 3, and the energization caused by the arc is formed between the two contacts. When the first arc contact member 9 and the second arc contact member 10 are kept in contact with each other by the pulling operation of the opening and closing mechanism portion 300, the first contact point 4 is largely separated from the second contact point 3, and is generated and connected. The arc between the points is greatly elongated. Due to the elongation of the arc, the arc resistance increases, and the main current is moved to the first arc contact 9 and the second arc. Contact 10. When the opening and closing mechanism portion 300 is further opened, the rotation of the movable member 5 is restricted by the stopper pin 17. As shown in Fig. 6, the contact point between the first arc contact member 9 and the second arc contact member 10 is separated. Then, an arc generated between the first arc contact 9 and the second arc contact 10 is induced to the arc extinguishing chamber 18 to be arc-extinguished. At this time, since the second arc contact 10 is not subjected to the pressing force from the first arc contact 9, the restoring force of the oblique coil spring 12 is pushed back to secure the original gap position with each of the first arc contacts 9. until.
依據本實施形態，係構成為，在發生短路電流等大電流時，於因開閉機構部300而使接點被分離前，藉由產生在可撓導體15的兩片間之電磁推斥力轉動可動件5，於第1弧接觸件9與第2弧接觸件10接觸後，藉可動件5的推壓動作使第2弧接觸件10位移，所以因該位移而吸收產生在可撓導體15的電磁推斥力，而維持在第1接點4與第2接點3的接觸狀態。因此，開閉機構部300動作前不會有兩接點間之發弧，可獲得通電性能良好之空氣斷路器。再者，因第2弧接觸件10位移，故可減少第1弧接觸件9與第2弧接觸件10的間隙達位移行程(stroke)的量，能將電弧更有效率地誘引到消弧室18。According to the present embodiment, when a large current such as a short-circuit current occurs, the electromagnetic repulsive force generated between the two sheets of the flexible conductor 15 is rotated before the contact is separated by the opening and closing mechanism unit 300. After the first arc contact 9 is in contact with the second arc contact 10, the second arc contact 10 is displaced by the pressing action of the movable member 5, so that the displacement is absorbed by the flexible conductor 15. The electromagnetic repulsive force is maintained while maintaining the contact state between the first contact 4 and the second contact 3. Therefore, before the opening and closing mechanism unit 300 operates, there is no arcing between the two contacts, and an air circuit breaker having good electric conduction performance can be obtained. Furthermore, since the displacement of the second arc contact 10 is reduced, the gap between the first arc contact 9 and the second arc contact 10 can be reduced by a displacement stroke, and the arc can be more efficiently induced to the arc suppression. Room 18.
又因為透過由固定金屬件11、斜線圈彈簧12及可動銷13所構成的支持手段電性連接第2弧接觸件10及電源側導體2，故不需要專用的連接構件，可削減零件件數並達到降低成本。Further, since the second arc contact 10 and the power source side conductor 2 are electrically connected by a supporting means including the fixed metal member 11, the skew coil spring 12, and the movable pin 13, a dedicated connecting member is not required, and the number of parts can be reduced. And achieve cost reduction.
因設有複數個(例如2個)用以支持第2弧接觸件10的支持手段，所以可降低第2弧接觸件10與固定金屬件11 之間的電流密度，並能進行有效率的電弧驅動。再者，因降低電弧驅動時的電流密度，故在熱方面亦有利，可防止斜線圈彈簧12的熔接、熔斷或因熱導致斜線圈彈簧12的變形。更且在流通有大電流時，即使各可動件片5a至5f與各第2弧接觸件10的間隙因製造的不均一(unevenness)等而非固定，也可使第2弧接觸件10不會偏心地位移，故可獲得進行穩定吸收發生在可撓導體的電磁推斥力之動作。Since a plurality of (for example, two) supporting means for supporting the second arc contact 10 are provided, the second arc contact 10 and the fixing metal member 11 can be lowered. The current density is between and can be driven by an efficient arc. Further, since the current density at the time of arc driving is reduced, it is also advantageous in terms of heat, and it is possible to prevent the skew coil spring 12 from being welded, melted, or deformed by the heat caused by the skew coil spring 12. Further, when a large current flows, even if the gap between each of the movable piece pieces 5a to 5f and each of the second arc contact pieces 10 is not fixed due to manufacturing unevenness or the like, the second arc contact piece 10 can be made not. Since it is displaced eccentrically, an action of stably absorbing the electromagnetic repulsive force occurring in the flexible conductor can be obtained.
以構成支持手段的彈性構件而言，於使用壓縮彈簧時，由於以彈簧的端面按壓第2弧接觸件10將會形成偏心負荷，而使第2弧接觸件10不會順暢地動作，故需加工壓縮彈簧的端面；然而於使用斜線圈彈簧12時，不用加工而具經濟性。再者，作為彈性構件可將彈簧荷重方向的長度構成較短，故可將支持手段作成精巧化。In the case of the elastic member constituting the supporting means, when the compression spring is used, since the second arc contact 10 is pressed by the end face of the spring, an eccentric load is formed, and the second arc contact 10 does not smoothly operate, so The end face of the compression spring is machined; however, when the skew coil spring 12 is used, it is economical without machining. Further, since the length of the spring load direction can be made shorter as the elastic member, the support means can be made compact.
第8圖係表示本發明第2實施形態之空氣斷路器的開閉接點部之上剖面圖。在本實施形態中係對應支持手段將第1實施形態之第2弧接觸件10分割成複數個者，且達到與上述第1實施形態相同之各種效果。在第8圖中，第2弧接觸件10係分割成第1個第2弧接觸件10a、第2個第2弧接觸件10b及第3個第2弧接觸件10c。對應第1、第2及第3的各個第2弧接觸件10分別設有第1個斜線圈彈簧12a、第2個斜線圈彈簧12b、第3個斜線圈彈簧12c；及第1個可動銷13a、第2個可動銷13b、第3個可動銷 13c。第1個可動銷13a係移動自如地貫穿基座1a、安裝金屬件11及第1個斜線圈彈簧12a，並鎖緊在第1個第2弧接觸件10a，使第1個第2弧接觸件10a與第1個可動銷13a可一體地位移。在第2個第2弧接觸件10b及第3個第2弧接觸件10c也分別與第1個第2弧接觸件10a一樣，移動自如地貫穿基座1a、安裝金屬件11與第2個斜線圈彈簧12b及第3個斜線圈彈簧12c，並螺固有第2個可動銷13b及第3個可動銷13c。而且，第2個第2弧接觸件10b與第2個可動銷13b、及第3個第2弧接觸件10c與第3個可動銷13c係可分別一體地位移。Fig. 8 is a cross-sectional view showing the opening and closing contact portion of the air circuit breaker according to the second embodiment of the present invention. In the present embodiment, the second arc contact 10 of the first embodiment is divided into a plurality of pieces in accordance with the support means, and various effects similar to those of the first embodiment are achieved. In Fig. 8, the second arc contact 10 is divided into a first second arc contact 10a, a second second arc contact 10b, and a third second arc contact 10c. Each of the first, second, and third second arc contact members 10 is provided with a first oblique coil spring 12a, a second oblique coil spring 12b, and a third oblique coil spring 12c, respectively; and a first movable pin 13a, the second movable pin 13b, the third movable pin 13c. The first movable pin 13a is movably inserted through the base 1a, the mounting metal fitting 11 and the first oblique coil spring 12a, and is locked to the first second arc contact 10a to make the first second arc contact The piece 10a and the first movable pin 13a are integrally displaceable. Similarly to the first second arc contact 10a, the second second arc contact 10b and the third second arc contact 10c are movably inserted through the susceptor 1a, the mounting metal 11 and the second The skew coil spring 12b and the third skew coil spring 12c are screwed into the second movable pin 13b and the third movable pin 13c. Further, the second second arc contact 10b and the second movable pin 13b, and the third second arc contact 10c and the third movable pin 13c are integrally displaceable.
各可動件片5a至5f的第1弧接觸件9即使在與第2弧接觸件10接觸的時間點(timing)因各壓力彈簧14之荷重不均一等而偏移的情況，亦因將第2弧接觸件10分割成三個，所以各第2弧接觸件10a、10b及10c係分別與各個相對應的各第1弧接觸件9接觸並位移。再者，關於其他結構及動作因與第1實施形態相同，故省略說明。The first arc contact 9 of each movable piece 5a to 5f is displaced even when the timing of contact with the second arc contact 10 is uneven due to the unevenness of the load of each of the pressure springs 14 Since the two arc contact members 10 are divided into three, each of the second arc contact members 10a, 10b, and 10c is in contact with and displaced from each of the corresponding first arc contact members 9, respectively. In addition, since other structures and operations are the same as those of the first embodiment, the description thereof is omitted.
第2弧接觸件10為一體的情況，當一個第1弧接觸件9先接觸到第2弧接觸件10時，因其推壓動作會使第2弧接觸件10位移並逸離，所以會有在維持其他的第1弧接觸件9未接觸於第2弧接觸件10的狀態下第1接點4與第2接點3產生分離之可能性，電弧的驅動效率會變差。不過，若依據本實施形態，因各第2弧接觸件10a至10c係分別與各個相對應的各第1弧接觸件9接觸並位移，所以相較於第2弧接觸件10為一體的情況，各第2弧接觸件10a 至10c與各第1弧接觸件9的接觸良好，可更有效率地將電弧導入消弧室18。When the second arc contact 10 is integrated, when the first arc contact 9 first contacts the second arc contact 10, the second arc contact 10 is displaced and disengaged due to the pressing action, so There is a possibility that the first contact 4 and the second contact 3 are separated in a state where the other first arc contact 9 is not in contact with the second arc contact 10, and the driving efficiency of the arc is deteriorated. However, according to the present embodiment, since each of the second arcuate contacts 10a to 10c is in contact with and displaced from each of the corresponding first arcuate contacts 9, the second arcuate contacts 10 are integrated with each other. , each of the second arc contacts 10a The contact with each of the first arcuate contacts 9 is good to 10c, and the arc can be introduced into the arc extinguishing chamber 18 more efficiently.
此外，在本實施形態中雖例示，可動件片設為6個，並將第2弧接觸件10分割成3個，但第2弧接觸件10的分割數只要是可動件片數的約數即可，作2分割或6分割亦無妨。藉由將第2弧接觸件10的分割數設成可動件片數的約數，因接觸各第2弧接觸件的可動件片係成相同數目，故可以良好地保持第1弧接觸件對第2弧接觸件之接觸。Further, in the present embodiment, the number of movable pieces is six, and the second arc contact 10 is divided into three. However, the number of divisions of the second arc contact 10 is only a divisor of the number of movable pieces. Yes, it is fine for 2 or 6 divisions. By setting the number of divisions of the second arc contact 10 to the number of the movable pieces, since the movable piece pieces contacting the respective second arc contact pieces are the same number, the first arc contact piece pair can be favorably maintained. 2 arc contact contact.
第9圖係本發明第3實施形態之空氣斷路器的開閉接點部之上剖面圖，第10圖係表示其開閉接點部之側剖面圖。在本實施形態中，如第9及10圖所示，在基座1a將振動抑制構件19a設在第2弧接觸件10兩端的上側，並將振動抑制構件19b設在第2弧接觸件10兩端的下側。因此可以防止第2弧接觸件10在位移時朝上下跳動，且將第1實施形態的支持手段設為一組而支持第2弧接觸件10中心之構件。關於其他結構及動作因係與第1實施形態相同故省略說明。Fig. 9 is a cross-sectional view showing the opening and closing contact portion of the air circuit breaker according to the third embodiment of the present invention, and Fig. 10 is a side sectional view showing the opening and closing contact portion. In the present embodiment, as shown in Figs. 9 and 10, the vibration suppressing member 19a is provided on the upper side of both ends of the second arc contact 10 in the susceptor 1a, and the vibration suppressing member 19b is provided in the second arc contact 10 The lower side of the ends. Therefore, it is possible to prevent the second arc contact 10 from jumping up and down during displacement, and to support the member of the center of the second arc contact 10 by the support means of the first embodiment. The other configurations and operation factors are the same as those of the first embodiment, and thus the description thereof is omitted.
依據本實施形態，因以單一的支持手段支持第2弧接觸件10，並在第2弧接觸件10兩端的上下分別設有振動抑制構件19a、19b，所以在第2弧接觸件10位移時，可防止上下跳動，可以良好地保持第1弧接觸件9與第2弧接觸件10之接觸。According to the present embodiment, since the second arc contact 10 is supported by a single supporting means, and the vibration suppressing members 19a and 19b are provided on the upper and lower sides of the second arc contact 10, respectively, when the second arc contact 10 is displaced, It can prevent the upper and lower jumps, and can keep the contact between the first arc contact 9 and the second arc contact 10 well.
1‧‧‧基座框體1‧‧‧Base frame
1a‧‧‧基座1a‧‧‧Base
1b‧‧‧中基座1b‧‧‧ base
2‧‧‧電源側導體2‧‧‧Power side conductor
3、3a、3b‧‧‧第2接點3, 3a, 3b‧‧‧ 2nd junction
4‧‧‧第1接點4‧‧‧1st junction
5‧‧‧可動件5‧‧‧ movable parts
5a、5b、5c、5d、5e、5f‧‧‧可動件片5a, 5b, 5c, 5d, 5e, 5f‧‧‧ movable pieces
6‧‧‧可動件銷6‧‧‧ movable parts
7‧‧‧接觸臂7‧‧‧Contact arm
8‧‧‧接觸臂軸8‧‧‧Contact arm shaft
9‧‧‧第1弧接觸件9‧‧‧1st arc contact
10、10a、10b、10c‧‧‧第2弧接觸件10, 10a, 10b, 10c‧‧‧2nd arc contact
11‧‧‧固定金屬件(安裝金屬件)11‧‧‧Fixed metal parts (mounting metal parts)
12、12a、12b、12c‧‧‧斜線圈彈簧12, 12a, 12b, 12c‧‧‧ oblique coil spring
13、13a、13b、13c‧‧‧可動銷13, 13a, 13b, 13c‧‧‧ movable
14‧‧‧壓力彈簧14‧‧‧pressure spring
15‧‧‧可撓導體15‧‧‧Flexible conductor
16‧‧‧負荷側導體16‧‧‧Load side conductor
17‧‧‧擋銷17‧‧‧Distribution
18‧‧‧消弧裝置(室)18‧‧‧Arc-extinguishing device (room)
19a、19b‧‧‧振動抑制構件19a, 19b‧‧‧Vibration suppression members
100‧‧‧空氣斷路器100‧‧‧Air circuit breaker
200‧‧‧開閉接點部200‧‧‧Open and close contact
300‧‧‧開閉機構部300‧‧‧Opening and Closing Department
A、B‧‧‧支持手段A, B‧‧‧ means of support
第1圖係表示本發明第1實施形態之空氣斷路器的導通狀態之側剖面圖。Fig. 1 is a side cross-sectional view showing an ON state of an air circuit breaker according to a first embodiment of the present invention.
第2圖係表示本發明第1實施形態之空氣斷路器的開閉接點部之上剖面圖。Fig. 2 is a cross-sectional view showing the opening and closing contact portion of the air circuit breaker according to the first embodiment of the present invention.
第3圖係表示本發明第1實施形態之空氣斷路器的通電部之透視斜視圖。Fig. 3 is a perspective perspective view showing an energizing portion of the air circuit breaker according to the first embodiment of the present invention.
第4圖係表示本發明第1實施形態之斜線圈彈簧的斜視圖。Fig. 4 is a perspective view showing a helical coil spring according to the first embodiment of the present invention.
第5圖係表示本發明第1實施形態之空氣斷路器的開閉動作途中之開閉接點部的側剖面圖。Fig. 5 is a side cross-sectional view showing the opening and closing contact portion in the middle of the opening and closing operation of the air circuit breaker according to the first embodiment of the present invention.
第6圖係表示本發明第1實施形態之空氣斷路器的斷開狀態之側剖面圖。Fig. 6 is a side sectional view showing the disconnected state of the air circuit breaker according to the first embodiment of the present invention.
第7圖係表示本發明第1實施形態之空氣斷路器發生大電流時的開閉接點部之側剖面圖。Fig. 7 is a side cross-sectional view showing an opening/closing contact portion when a large current is generated in the air circuit breaker according to the first embodiment of the present invention.
第8圖係表示本發明第2實施形態之空氣斷路器的開閉接點部之上剖面圖。Fig. 8 is a cross-sectional view showing the opening and closing contact portion of the air circuit breaker according to the second embodiment of the present invention.
第9圖係表示本發明第3實施形態之空氣斷路器的開閉接點部之上剖面圖。Fig. 9 is a cross-sectional view showing the opening and closing contact portion of the air circuit breaker according to the third embodiment of the present invention.
第10圖係表示本發明第3實施形態之空氣斷路器的開閉接點部之側剖面圖。Figure 10 is a side cross-sectional view showing an opening/closing contact portion of an air circuit breaker according to a third embodiment of the present invention.
1‧‧‧基座框體1‧‧‧Base frame
1a‧‧‧基座1a‧‧‧Base
1b‧‧‧中基座1b‧‧‧ base
2‧‧‧電源側導體2‧‧‧Power side conductor
3‧‧‧第2接點3‧‧‧2nd junction
4‧‧‧第1接點4‧‧‧1st junction
5‧‧‧可動件5‧‧‧ movable parts
6‧‧‧可動件銷6‧‧‧ movable parts
7‧‧‧接觸臂7‧‧‧Contact arm
8‧‧‧接觸臂軸8‧‧‧Contact arm shaft
9‧‧‧第1弧接觸件9‧‧‧1st arc contact
10‧‧‧第2弧接觸件10‧‧‧2nd arc contact
11‧‧‧固定金屬件(安裝金屬件)11‧‧‧Fixed metal parts (mounting metal parts)
12‧‧‧斜線圈彈簧12‧‧‧ oblique coil spring
13‧‧‧可動銷13‧‧‧Distributable
14‧‧‧壓力彈簧14‧‧‧pressure spring
15‧‧‧可撓導體15‧‧‧Flexible conductor
16‧‧‧負荷側導體16‧‧‧Load side conductor
17‧‧‧擋銷17‧‧‧Distribution
18‧‧‧消弧裝置(室)18‧‧‧Arc-extinguishing device (room)
100‧‧‧空氣斷路器100‧‧‧Air circuit breaker
200‧‧‧開閉接點部200‧‧‧Open and close contact
300‧‧‧開閉機構部300‧‧‧Opening and Closing Department
Claims (7)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007310234A JP2009134995A (en) | 2007-11-30 | 2007-11-30 | Air circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200924003A TW200924003A (en) | 2009-06-01 |
| TWI401719B true TWI401719B (en) | 2013-07-11 |
Family
ID=40742942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW97130012A TWI401719B (en) | 2007-11-30 | 2008-08-07 | air circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2009134995A (en) |
| CN (1) | CN101447348B (en) |
| TW (1) | TWI401719B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465255B (en) * | 2014-12-25 | 2016-07-06 | 常熟开关制造有限公司(原常熟开关厂） | A kind of low-voltage breaker contact system |
| KR20170077659A (en) * | 2015-12-28 | 2017-07-06 | 엘에스산전 주식회사 | Structure of contacts for air circuit breaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2571933A (en) * | 1948-07-30 | 1951-10-16 | Westinghouse Electric Corp | Air circuit breaker |
| TW556240B (en) * | 2002-02-22 | 2003-10-01 | Mitsubishi Electric Corp | Air circuit breaker |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852062U (en) * | 1971-10-15 | 1973-07-06 | ||
| JPS5650644Y2 (en) * | 1976-04-14 | 1981-11-27 | ||
| JPS63108629A (en) * | 1986-10-24 | 1988-05-13 | 株式会社東芝 | Circular contact |
| US5160817A (en) * | 1990-11-21 | 1992-11-03 | Automatic Switch Company | Electrical switch contact arrangement having quick break arcing contacts |
| EP1168391B1 (en) * | 2000-01-11 | 2005-11-30 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker |
| JP4257990B2 (en) * | 2002-04-12 | 2009-04-30 | 三菱電機株式会社 | Pull-out type circuit breaker |
| JP4024726B2 (en) * | 2003-07-17 | 2007-12-19 | 三菱電機株式会社 | Multipole circuit breaker |
-
2007
- 2007-11-30 JP JP2007310234A patent/JP2009134995A/en active Pending
-
2008
- 2008-08-07 TW TW97130012A patent/TWI401719B/en not_active IP Right Cessation
- 2008-08-29 CN CN2008102101938A patent/CN101447348B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2571933A (en) * | 1948-07-30 | 1951-10-16 | Westinghouse Electric Corp | Air circuit breaker |
| TW556240B (en) * | 2002-02-22 | 2003-10-01 | Mitsubishi Electric Corp | Air circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101447348B (en) | 2011-11-30 |
| TW200924003A (en) | 2009-06-01 |
| CN101447348A (en) | 2009-06-03 |
| JP2009134995A (en) | 2009-06-18 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |