TWI412752B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- TWI412752B TWI412752B TW098102195A TW98102195A TWI412752B TW I412752 B TWI412752 B TW I412752B TW 098102195 A TW098102195 A TW 098102195A TW 98102195 A TW98102195 A TW 98102195A TW I412752 B TWI412752 B TW I412752B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
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Abstract
Description
本發明係有關檢測事故電流而進行電路保護的電路遮斷器，尤其有關遮斷器的過電流的檢測及跳脫動作的高速化。The present invention relates to a circuit interrupter for detecting an accident current and performing circuit protection, and more particularly relates to detection of an overcurrent of an interrupter and speeding up of a tripping operation.
習知的電路遮斷器的過電流檢測係將成為配置於各相的變流器的二次輸出之電流予以整流而形成的定電壓電路作為用以使跳脫電路動作的定電壓能量源，並且以構成上述跳脫電路的微電腦進行演算及判斷，依據預定的反限時特性而彈壓跳脫線圈以進行插入在各相的遮斷器的跳脫動作。(例如參照專利文獻1)The overcurrent detection system of the conventional circuit breaker is a constant voltage circuit formed by rectifying a current of a secondary output of a current transformer arranged in each phase as a constant voltage energy source for operating the trip circuit. Further, the microcomputer is configured to perform calculation and determination by the microcomputer that constitutes the trip circuit, and the tripping coil is biased in accordance with a predetermined inverse-time characteristic to perform a tripping operation of the interrupter inserted in each phase. (For example, refer to Patent Document 1)
專利文獻1：日本特開2001-165964號公報Patent Document 1: Japanese Laid-Open Patent Publication No. 2001-165964
然而，在上述之利用微電腦使遮斷器的跳脫電路動作的方式中，雖然於依據預定的反限時特性之動作區域內並沒有問題，但例如在流通有像是超過最大瞬間電流設定值的短路大電流時，從開始遮斷器的跳脫動作到遮斷動作結束為止，實際上係需要例如約二十多毫秒(ms)的時間。具體而言，從發生短路到形成定電壓電路所產生的電壓源為止需要例如約1ms以下，含有微電腦的初始設定時間的演算及判斷時間與觸發電路的動作需要例如約10ms，跳脫機構的動作時間需要例如約15ms，合計需要約26ms的時間。However, in the above-described method in which the tripping circuit of the interrupter is operated by the microcomputer, although there is no problem in the operating region according to the characteristic of the predetermined inverse limit, for example, when the image is distributed, the image exceeds the maximum instantaneous current setting value. When a large current is short-circuited, it takes about 20 milliseconds (ms), for example, from the start of the tripping operation of the interrupter to the end of the interrupting operation. Specifically, for example, about 1 ms or less is required from the occurrence of a short circuit to a voltage source generated by the constant voltage circuit, and the calculation and determination time including the initial setting time of the microcomputer and the operation of the flip-flop circuit are required to be, for example, about 10 ms, and the action of the trip mechanism is performed. The time needs to be, for example, about 15 ms, and the total takes about 26 ms.
因此，當流通有像是超過最大瞬間電流設定值的短路大電流時，從開始遮斷器的跳脫動作到遮斷動作結束為止，大電流係流通於遮斷器的開閉接點，電弧(arc)長時間在接點間產生，導致接點損耗而有損通電性能。此外，由於接點間的發弧(arcing)而流通比平常多的短路電流，因而亦有引起兩接點間的熔著之虞。Therefore, when a short-circuit large current that exceeds the maximum instantaneous current setting value flows, the large current flows through the opening and closing contact of the breaker, and the arc flows from the start of the tripping operation of the interrupter to the end of the interrupting operation. Arc) occurs between contacts for a long time, resulting in contact loss and loss of energization performance. In addition, since a short-circuit current is more common than usual due to arcing between the contacts, there is also a problem of melting between the two contacts.
本發明乃為了解決上述問題而研創者，其目的在於提供一種藉由縮短大電流發生時之到遮斷器跳脫動作開始為止的時間，從而消除接點的損耗及熔著，因此通電性能長期良好且可靠度高的電路遮斷器。The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a long-term power-on performance by shortening the time until the start of the tripping operation of the interrupter when a large current occurs, thereby eliminating the loss of the contact and the melting. A good and reliable circuit interrupter.
本發明的電路遮斷器係以配置於配線電路的電源供給變流器的二次電流予以整流而形成的定電壓電路作為用以使跳脫電路動作的定電壓能量源，並且於上述跳脫電路具備依據流通於上述配線電路的負載電流進行演算及判斷以獲得預定的反限時動作特性之微電腦，且依據上述反限時動作特性進行由第1跳脫機構進行的遮斷器的跳脫動作者，其中，構成為：設置有第2跳脫機構，當上述負載電流超過該遮斷器的最大瞬間電流設定值時，在遮斷器的開閉接點間發弧之前進行上述遮斷器的跳脫動作，且由上述第2跳脫機構進行的遮斷器的跳脫動作係比由上述第1跳脫機構進行的跳脫動作更早進行。The circuit breaker of the present invention is a constant voltage circuit formed by rectifying a secondary current of a power supply converter arranged in a wiring circuit, and serving as a constant voltage energy source for operating the trip circuit, and jumping off The circuit includes a microcomputer that performs calculation and determination based on a load current flowing through the wiring circuit to obtain a predetermined reverse limit operation characteristic, and performs a tripping of the interrupter by the first tripping mechanism according to the reverse limit operation characteristic. The second tripping mechanism is configured to: when the load current exceeds the maximum instantaneous current setting value of the interrupter, perform the jump of the interrupter before arcing between the open/close contact of the interrupter The tripping operation of the interrupter by the second tripping mechanism is performed earlier than the tripping operation by the first tripping mechanism.
依據本發明，由於設置有當流通有大小超過最大瞬間電流設定值且有遮斷器的接點間發弧之虞的大電流時，立刻進行遮斷器的跳脫動作之第2跳脫機構，因此從流通大電流到遮斷器的跳脫動作開始為止的時間會變短，能夠在兩接點間發弧之前完成遮斷動作，從而消除接點的損耗，具有能夠獲得通電性能良好的電路遮斷器之效果。According to the present invention, since the large current flowing through the arc between the contacts having the magnitude exceeding the maximum instantaneous current setting value and having the interrupter is provided, the second tripping mechanism for immediately performing the tripping action of the interrupter is provided. Therefore, the time from the flow of a large current to the start of the tripping operation of the interrupter is shortened, and the interrupting operation can be completed before the arcing between the two contacts, thereby eliminating the loss of the contact and having good electric conduction performance. The effect of a circuit breaker.
以下，針對本發明實施形態1，參照第1圖至第3圖進行說明。第1圖係本發明實施形態1的電路遮斷器的跳脫電路構成圖，第2圖係顯示本發明的電路遮斷器的跳脫動作特性圖，第3圖係第2跳脫機構的剖面圖。在第1圖中，1為配線電路，2為遮斷器的開閉接點，3a、3b、3c為配置於上述各電路1的第1電源供給變流器，4a、4b、4c為電流檢測線圈，5為將來自上述第1電源供給變流器3a、3b、3c的二次輸出電流予以整流之第1整流電路，6為接收上述第1整流電路5的整流輸出並形成經穩定化的定電壓源之定電壓電路，7為以上述定電壓電路6的輸出作為電壓源且以上述電流檢測線圈4a、4b、4c的二次電流作為輸入信號的控制電路，且由專用IC8及微電腦9所構成，其中，專用IC8係由未圖示的A/D(類比/數位)轉換電路、積分電路等所構成，微電腦9係內建控制遮斷器的反限時動作之特性，進行預定的演算及判斷。Hereinafter, the first embodiment of the present invention will be described with reference to Figs. 1 to 3 . 1 is a configuration diagram of a trip circuit of a circuit breaker according to a first embodiment of the present invention, FIG. 2 is a diagram showing a tripping operation characteristic of the circuit breaker of the present invention, and FIG. 3 is a second tripping mechanism. Sectional view. In Fig. 1, 1 is a wiring circuit, 2 is an open/close contact of a breaker, 3a, 3b, and 3c are first power supply converters disposed in the respective circuits 1, and 4a, 4b, and 4c are current detection. The coil 5 is a first rectifier circuit that rectifies secondary output currents from the first power supply converters 3a, 3b, and 3c, and 6 receives the rectified output of the first rectifier circuit 5 and is stabilized. The constant voltage circuit of the constant voltage source, 7 is a control circuit in which the output of the constant voltage circuit 6 is used as a voltage source and the secondary current of the current detecting coils 4a, 4b, 4c is used as an input signal, and the dedicated IC 8 and the microcomputer 9 are used. In the configuration, the dedicated IC 8 is composed of an A/D (analog/digital) conversion circuit (not shown), an integrating circuit, and the like, and the microcomputer 9 is built-in to control the characteristics of the reverse limit operation of the interrupter, and performs predetermined calculation. And judgment.
雖然未圖示，但如專利文獻1之記載，於微電腦9係具備有：長限時特性檢測部，檢測額定電流的115%至短限時電流設定值為止之範圍；短限時特性檢測部，檢測短限時電流設定值至瞬間電流設定值為止之範圍；及瞬間特性檢測部，檢測瞬間電流設定值以上之範圍；且係利用各自相異的指數函數型特性來控制電流值與跳脫時限之關係。另外，10為藉由上述微電腦9的輸出信號而動作的閘流體(thyristor)等觸發電路，11為藉由上述觸發電路10導通而激磁的第1跳脫線圈，12a、12b、12c係配置於上述各電路1的第2電源供給變流器，13係將來自上述第2電源供給變流器12a、12b、12c的二次輸出電流予以整流的第2整流電路，14係接受上述第2整流電路13的輸出而激磁的第2跳脫線圈。In the microcomputer 9, the microcomputer 9 includes a range of detection of a rated current of 115% to a short-time current setting value, and a short-time characteristic detecting unit for detecting a short period. The range from the time-limited current set value to the instantaneous current set value; and the instantaneous characteristic detecting unit detects a range of the instantaneous current set value or more; and controls the relationship between the current value and the trip time limit by using different exponential function characteristics. Further, reference numeral 10 denotes a trigger circuit such as a thyristor that operates by the output signal of the microcomputer 9, and 11 denotes a first trip coil that is excited by the trigger circuit 10 being turned on, and 12a, 12b, and 12c are disposed. The second power supply converter of each of the above-described circuits 1 is a second rectifier circuit that rectifies the secondary output current from the second power supply converters 12a, 12b, and 12c, and receives the second rectification. The second trip coil that is excited by the output of the circuit 13.
接著，依據第2圖的跳脫動作特性圖說明本實施形態1的電路遮斷器的跳脫動作。如第2圖所示，係具有反限時特性，亦即，當額定電流以上的電流流通於配線電路1時，隨著該電流的大小變大，遮斷器的開閉接點2開路的時間係變短，其中，分別將額定電流的115%至短限時電流設定值為止之範圍定義為長限時動作區域、將短限時電流設定值至瞬間電流設定值(最大)為止之範圍定義為短限時動作區域、將瞬間電流設定值以上定義為瞬間動作區域。此外，在第2圖中係為了幫助理解而以與額定電流之比來顯示假設特定的遮斷器(例如額定電流為2000A)的跳脫動作時的具體電流值，當遮斷器的額定電流改變時，其特性亦變化。Next, the tripping operation of the circuit breaker according to the first embodiment will be described based on the tripping operation characteristic diagram of Fig. 2 . As shown in Fig. 2, the reverse limit characteristic is obtained, that is, when a current equal to or higher than the rated current flows through the wiring circuit 1, as the magnitude of the current increases, the opening and closing contact 2 of the interrupter opens. In the short-term, the range from the 115% of the rated current to the short-time current setting value is defined as the long-term operating range, and the range from the short-term current setting value to the instantaneous current setting value (maximum) is defined as the short-term action. The area and the instantaneous current setting value are defined as the instantaneous action area. In addition, in Figure 2, in order to help understanding, the specific current value at the time of the tripping action assuming a specific interrupter (for example, a rated current of 2000 A) is shown in comparison with the rated current, when the rated current of the interrupter When it changes, its characteristics also change.
在此，當負載電流流通於配線電路1時，第1電源供給變流器3a、3b、3c的二次輸出電流係藉由第1整流電路5而整流並藉由定電壓電路6而穩定化，成為使控制電路7動作之電源。另一方面，藉由電流檢測線圈4a、4b、4c檢測流通於配線電路1的電流的大小，並經由上述控制電路7的專用IC 8而以微電腦9進行監視。微電腦9係依據流通於配線電路1的負載電流的大小來判斷是第2圖中的長限時動作區域、短限時動作區域或者瞬間動作區域，依據各者的反限時特性輸出計算結果，使由閘流體所構成的觸發電路10動作而激磁第1跳脫線圈，以進行遮斷器的跳脫動作。到該第1跳脫機構的動作結束而止，如前所述需要約二十多毫秒(ms)的時間。Here, when the load current flows through the wiring circuit 1, the secondary output currents of the first power supply converters 3a, 3b, and 3c are rectified by the first rectifier circuit 5 and stabilized by the constant voltage circuit 6. It becomes a power source that operates the control circuit 7. On the other hand, the current detecting coils 4a, 4b, and 4c detect the magnitude of the current flowing through the wiring circuit 1, and are monitored by the microcomputer 9 via the dedicated IC 8 of the control circuit 7. The microcomputer 9 determines whether it is the long-term operation area, the short-time operation area, or the instantaneous operation area in FIG. 2 depending on the magnitude of the load current flowing through the wiring circuit 1, and outputs a calculation result according to the inverse-time characteristic of each of them. The trigger circuit 10 formed of the fluid operates to excite the first trip coil to perform the tripping operation of the interrupter. When the operation of the first tripping mechanism is completed, it takes about twenty milliseconds (ms) as described above.
另外，實際情形中，在負載電流超過最大瞬間電流設定值、至到達有遮斷器本體發弧之虞的電流為止的範圍A中，上述第2跳脫機構的動作係比上述第1跳脫機構的動作先開始。Further, in the actual case, in the range A until the load current exceeds the maximum instantaneous current setting value and reaches the current after the arc of the main body of the interrupter, the operation of the second trip mechanism is higher than the first trip. The action of the organization begins first.
亦即，若令第2圖中的遮斷器本體發弧的區域為B，則在本發明中，當超過最大瞬間電流設定值X(額定電流的例如約16倍)且大小達使遮斷器本體的接點間發弧的電流Y(額定電流的例如約30倍)之過電流流通於配線電路1時，係從第2電源供給變流器12a、12b、12c經由第2整流電路13激磁第2跳脫線圈14，而使遮斷器的開路動作比第1跳脫線圈11的動作早進行。此時的第2跳脫線圈的動作電流係以第2圖的Z點所示，係為額定電流的例如約25倍之值而在遮斷器本體發弧之前進行觸發動作。That is, if the area where the interrupter body in FIG. 2 is arced is B, in the present invention, when the maximum instantaneous current set value X (for example, about 16 times of the rated current) is exceeded and the size is made to be interrupted. When the overcurrent of the current Y (the rated current is, for example, about 30 times) between the contacts of the main body flows through the wiring circuit 1, the second power supply converters 12a, 12b, and 12c pass through the second rectifying circuit 13 The second trip coil 14 is excited to cause the open operation of the interrupter to proceed earlier than the operation of the first trip coil 11. The operating current of the second trip coil at this time is a value of, for example, about 25 times the rated current, as shown by the Z point in FIG. 2, and the triggering operation is performed before the arc of the interrupter body is arced.
因此，當不存在上述第2跳脫機構而僅有第1跳脫機構時係如前所述，到動作結束為止需要例如約二十多毫秒，相對於此，當併用第2跳脫機構時，則由於不用透過由含有微電腦9的控制電路7與閘流體所構成的觸發電路10，因此到其動作結束為止的時間係減少達有包含微電腦9的初始設定之演算及判斷時間(例如約10ms)而成為例如十多毫秒。另外，第2跳脫線圈14的激磁時點係以如下述使上述Z點會在從最大瞬間電流設定值X至使遮斷器本體的接點間發弧的電流Y之間(A區間)出現之方式進行調整。Therefore, when the second tripping mechanism is absent and only the first tripping mechanism is present, as described above, it takes about 20 milliseconds until the operation ends, whereas when the second tripping mechanism is used in combination, Since the trigger circuit 10 including the control circuit 7 including the microcomputer 9 and the thyristor is not required, the time until the end of the operation is reduced to the calculation and judgment time including the initial setting of the microcomputer 9 (for example, about 10 ms). ) becomes, for example, more than ten milliseconds. Further, the exciting timing of the second trip coil 14 is such that the Z point appears between the maximum instantaneous current setting value X and the current Y which causes the arc between the contacts of the interrupter body (A section) as follows. The way to adjust.
第3圖係第2跳脫機構的概略構成圖，與上述第2跳脫線圈14的激磁時點的調整方法合併說明。在圖中，14係為捲繞於繞線管(bobbin)21的芯部之線圈，相當於第1圖中的第2跳脫線圈14。在上述繞線管21內係以彼此相對向的方式配設有固定鐵心22與可動鐵心23，此外，於上述固定鐵心22與可動鐵心23之間係存在有回復彈簧(return spring)24而使兩者保持預定間隙27。軛部(yoke)25係用以使上述線圈14產生的磁通透過上述固定鐵心22、可動鐵心23而磁性耦合者，軸26係在超過上述最大瞬間電流設定值且大小達使遮斷器本體的接點間發弧之過電流流通於配線電路1時使遮斷器的開閉接點2動作(未圖示)者。Fig. 3 is a schematic configuration diagram of the second trip mechanism, and a method of adjusting the excitation time of the second trip coil 14 will be described. In the figure, reference numeral 14 denotes a coil wound around a core portion of a bobbin 21, and corresponds to the second trip coil 14 in Fig. 1 . The fixed iron core 22 and the movable iron core 23 are disposed so as to face each other in the bobbin 21, and a return spring 24 is present between the fixed iron core 22 and the movable iron core 23 to make a return spring 24 Both maintain a predetermined gap 27. The yoke 25 is configured to magnetically couple the magnetic flux generated by the coil 14 to the fixed iron core 22 and the movable iron core 23, and the shaft 26 is connected to the maximum instantaneous current setting value and the size of the interrupter body. When the overcurrent of the arcing between the contacts flows through the wiring circuit 1, the opening/closing contact 2 of the interrupter is operated (not shown).
如上所述，第2跳脫機構係由線圈14、固定鐵心22、可動鐵心23、回復彈簧24等所構成，且如上述，藉由回復彈簧24的彈簧力，可動鐵心23與固定鐵心22係往彼此分離的方向被彈壓。當上述負載電流為超過額定電流且達到最大瞬間電流設定值X之值時，線圈14的磁動勢係設定為比回復彈簧24的彈簧荷重小，可動鐵心23不會被固定鐵心22吸著，因此不會使遮斷器觸發。但當流通有超過最大瞬間電流設定值X的大電流時，線圈14的磁動勢係設定為比前述彈簧荷重大，可動鐵心23會被固定鐵心22吸著，使軸26突出而使第2跳脫機構動作。As described above, the second trip mechanism is constituted by the coil 14, the fixed iron core 22, the movable iron core 23, the return spring 24, and the like, and as described above, the movable iron core 23 and the fixed iron core 22 are supported by the spring force of the return spring 24. They are pressed in the direction of separation from each other. When the load current exceeds the rated current and reaches the value of the maximum instantaneous current set value X, the magnetomotive force of the coil 14 is set to be smaller than the spring load of the return spring 24, and the movable iron core 23 is not sucked by the fixed iron core 22, Therefore, the interrupter will not be triggered. However, when a large current exceeding the maximum instantaneous current setting value X flows, the magnetomotive force of the coil 14 is set to be larger than the aforementioned spring load, and the movable iron core 23 is sucked by the fixed iron core 22, so that the shaft 26 is protruded to make the second Jump off the mechanism action.
上述回復彈簧24的彈簧荷重及線圈14的磁動勢係以使該可動鐵心23被吸著於固定鐵心22的動作點成為超過最大瞬間電流設定值X且未滿於遮斷器間的接點間發弧的電流之方式進行調整、設定。The spring load of the return spring 24 and the magnetomotive force of the coil 14 are such that the operating point of the movable iron core 23 being attracted to the fixed iron core 22 exceeds the maximum instantaneous current set value X and is not close to the joint between the interrupters. Adjust and set the current of the arc.
如上述，當為最大瞬間電流設定值以下的電流時係使第1跳脫機構精密度佳地動作，此外，當為超過最大瞬間電流設定值且未滿於遮斷器的接點間發弧的電流時係使第2跳脫機構動作，因此，能夠縮短含有微電腦的控制電路所進行的演算及判斷時間，能夠抑制大電流區域的發弧。As described above, when the current is equal to or lower than the maximum instantaneous current setting value, the first tripping mechanism is operated with excellent precision, and the arc is connected between the contacts that exceed the maximum instantaneous current setting value and is not full of the interrupter. Since the second tripping mechanism is operated during the current flow, the calculation and determination time by the control circuit including the microcomputer can be shortened, and the arcing in the large current region can be suppressed.
第4圖係本發明實施形態2的電路遮斷器的跳脫電路構成圖，與針對實施形態1說明的第1圖中相同或相當之部分係標註相同的符號。本發明的實施形態2係為省略實施形態1的第2電源供給變流器12a、12b、12c及第2整流電路13，且在整流電路5與定電壓電路6之間插入第2跳脫線圈14者。藉由設計為上述構成，與實施形態1的構成相比，電源供給變流器及整流電路分別只要有1組即可，因此電路構成變得較簡單。Fig. 4 is a diagram showing a configuration of a trip circuit of a circuit breaker according to a second embodiment of the present invention, and the same or corresponding portions as those in the first embodiment described in the first embodiment are denoted by the same reference numerals. In the second embodiment of the present invention, the second power supply converters 12a, 12b, and 12c and the second rectifier circuit 13 of the first embodiment are omitted, and the second trip coil is inserted between the rectifier circuit 5 and the constant voltage circuit 6. 14 people. By designing the above-described configuration, the power supply converter and the rectifier circuit are each required to have one set as compared with the configuration of the first embodiment. Therefore, the circuit configuration is simple.
第5圖係本發明實施形態3的電路遮斷器的跳脫電路構成圖。與第1圖中相同或相當之部分係標註相同的符號，以下僅針對與第1圖中相異之部分進行說明。本發明的實施形態3係為將實施形態1的第2電源供給變流器12a、12b、12c及第2整流電路13插入至第1電源供給變流器3a、3b、3c的二次側電路者。藉由設計為上述構成，與實施形態1的構成相比，能夠將貫通的導體的外形及電流的大小皆減小，因此能夠將第2電源供給變流器12a、12b、12c及整流電路構成為小容量。Fig. 5 is a block diagram showing the configuration of a trip circuit of the circuit breaker according to the third embodiment of the present invention. The same or corresponding portions as those in Fig. 1 are denoted by the same reference numerals, and only the differences from the first embodiment will be described below. In the third embodiment of the present invention, the second power supply converters 12a, 12b, and 12c and the second rectifier circuit 13 of the first embodiment are inserted into the secondary side circuits of the first power supply converters 3a, 3b, and 3c. By. By designing the above configuration, the outer shape of the through conductor and the magnitude of the current can be reduced as compared with the configuration of the first embodiment. Therefore, the second power supply converters 12a, 12b, and 12c and the rectifier circuit can be configured. For small capacity.
第6圖係本發明實施形態4的電路遮斷器的跳脫電路構成圖。與第1圖中相同或相當之部分係標註相同的符號，以下僅針對與第1圖中相異之部分進行說明。本發明的實施形態4係為將可變電阻器15以與實施形態1的第2跳脫線圈14並聯的方式插入者。藉由設計為上述構成，能夠使從第2電源供給變流器12a、12b、12c供給至上述第2跳脫線圈14的電流分流，因此藉由調整該可變電阻器15的值，便能夠依照遮斷器的額定電流等來設定使第2跳脫線圈14動作的短路電流的大小。Fig. 6 is a view showing the configuration of a trip circuit of the circuit breaker according to the fourth embodiment of the present invention. The same or corresponding portions as those in Fig. 1 are denoted by the same reference numerals, and only the differences from the first embodiment will be described below. According to the fourth embodiment of the present invention, the variable resistor 15 is inserted in parallel with the second trip coil 14 of the first embodiment. By designing the above configuration, the current supplied from the second power supply converters 12a, 12b, and 12c to the second trip coil 14 can be shunted. Therefore, by adjusting the value of the variable resistor 15, it is possible to adjust the value of the variable resistor 15. The magnitude of the short-circuit current that causes the second trip coil 14 to operate is set in accordance with the rated current of the interrupter or the like.
1．．．配線電路1. . . Wiring circuit
2．．．遮斷器的開閉接點2. . . Open/close contact of the interrupter
3a、3b、3c．．．第1電源供給變流器3a, 3b, 3c. . . First power supply converter
4a、4b、4c．．．電流檢測線圈4a, 4b, 4c. . . Current detecting coil
5．．．第1整流電路5. . . First rectifier circuit
6．．．定電壓電路6. . . Constant voltage circuit
7．．．控制電路7. . . Control circuit
8．．．專用IC8. . . Dedicated IC
9．．．微電腦9. . . Microcomputer
10．．．觸發電路10. . . Trigger circuit
11．．．第1跳脫線圈11. . . First trip coil
12a、12b、12c．．．第2電源供給變流器12a, 12b, 12c. . . Second power supply converter
13．．．第2整流電路13. . . Second rectifier circuit
14．．．第2跳脫線圈14. . . 2nd trip coil
15．．．可變電阻器15. . . Variable resistor
21．．．繞線管twenty one. . . Winding tube
22．．．固定鐵心twenty two. . . Fixed iron core
23．．．可動鐵心twenty three. . . Movable iron core
24．．．回復彈簧twenty four. . . Recovery spring
25．．．軛部25. . . Yoke
26．．．軸26. . . axis
27．．．間隙27. . . gap
第1圖係本發明實施形態1的電路遮斷器的跳脫電路構成圖。Fig. 1 is a block diagram showing the configuration of a trip circuit of the circuit breaker according to the first embodiment of the present invention.
第2圖係顯示本發明的電路遮斷器的跳脫動作特性的一例之圖。Fig. 2 is a view showing an example of the tripping operation characteristics of the circuit breaker of the present invention.
第3圖係第2跳脫機構的概略剖面圖。Fig. 3 is a schematic cross-sectional view showing the second tripping mechanism.
第4圖係本發明實施形態2的電路遮斷器的跳脫電路構成圖。Fig. 4 is a block diagram showing the configuration of a trip circuit of the circuit breaker according to the second embodiment of the present invention.
第5圖係本發明實施形態3的電路遮斷器的跳脫電路構成圖。Fig. 5 is a block diagram showing the configuration of a trip circuit of the circuit breaker according to the third embodiment of the present invention.
第6圖係本發明實施形態4的電路遮斷器的跳脫電路構成圖。Fig. 6 is a view showing the configuration of a trip circuit of the circuit breaker according to the fourth embodiment of the present invention.
1．．．配線電路1. . . Wiring circuit
2．．．遮斷器的開閉接點2. . . Open/close contact of the interrupter
3a、3b、3c．．．第1電源供給變流器3a, 3b, 3c. . . First power supply converter
4a、4b、4c．．．電流檢測線圈4a, 4b, 4c. . . Current detecting coil
5．．．第1整流電路5. . . First rectifier circuit
6．．．定電壓電路6. . . Constant voltage circuit
7．．．控制電路7. . . Control circuit
8．．．專用IC8. . . Dedicated IC
9．．．微電腦9. . . Microcomputer
10．．．觸發電路10. . . Trigger circuit
11．．．第1跳脫線圈11. . . First trip coil
12a、12b、12c．．．第2電源供給變流器12a, 12b, 12c. . . Second power supply converter
13．．．第2整流電路13. . . Second rectifier circuit
14．．．第2跳脫線圈14. . . 2nd trip coil
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008233699A JP5322545B2 (en) | 2008-09-11 | 2008-09-11 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201011306A TW201011306A (en) | 2010-03-16 |
| TWI412752B true TWI412752B (en) | 2013-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW098102195A TWI412752B (en) | 2008-09-11 | 2009-01-21 | Circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5322545B2 (en) |
| KR (1) | KR101050354B1 (en) |
| CN (1) | CN101673929B (en) |
| TW (1) | TWI412752B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6009340B2 (en) * | 2012-12-12 | 2016-10-19 | 三菱電機株式会社 | Circuit breaker and electromagnetic trip device |
| US9260015B2 (en) * | 2014-01-09 | 2016-02-16 | Ford Global Technologies, Inc. | Method and system for contactor weld detection |
| WO2017199412A1 (en) * | 2016-05-20 | 2017-11-23 | 三菱電機株式会社 | Circuit breaker |
| CN108092242B (en) * | 2017-11-30 | 2022-09-20 | 中国电力科学研究院有限公司 | Multi-voltage-level power grid inverse time-limit current protection method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192137U (en) * | 1984-11-21 | 1986-06-14 | ||
| JPS6345728A (en) * | 1986-08-11 | 1988-02-26 | 株式会社東芝 | Circuit breaker |
| JPH07326273A (en) * | 1994-05-31 | 1995-12-12 | Fuji Electric Co Ltd | Overcurrent trip device for circuit breaker |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042985C (en) * | 1993-10-05 | 1999-04-14 | 富士电机株式会社 | Circuit breaker |
| JP2000294113A (en) * | 1999-04-13 | 2000-10-20 | Mitsubishi Electric Corp | Circuit breaker |
| JP2001165964A (en) * | 1999-12-09 | 2001-06-22 | Mitsubishi Electric Corp | Circuit breaker with current conduction information- measuring device |
| JP4052785B2 (en) * | 2000-09-08 | 2008-02-27 | 株式会社日立産機システム | Circuit breaker |
| KR200268190Y1 (en) | 2001-12-19 | 2002-03-15 | 주식회사 화인엘컴스 | Circuit breaker and circuit breaker with large current trip coil |
| DE50211839D1 (en) * | 2002-09-24 | 2008-04-17 | Abb Schweiz Ag | breakers |
| KR100483931B1 (en) * | 2003-02-22 | 2005-04-15 | 상도전기통신 주식회사 | Trip Apparatus of Overload Circuit Breaker |
-
2008
- 2008-09-11 JP JP2008233699A patent/JP5322545B2/en not_active Expired - Fee Related
-
2009
- 2009-01-21 TW TW098102195A patent/TWI412752B/en not_active IP Right Cessation
- 2009-02-19 KR KR1020090013867A patent/KR101050354B1/en active IP Right Grant
- 2009-03-27 CN CN2009101291484A patent/CN101673929B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192137U (en) * | 1984-11-21 | 1986-06-14 | ||
| JPS6345728A (en) * | 1986-08-11 | 1988-02-26 | 株式会社東芝 | Circuit breaker |
| JPH07326273A (en) * | 1994-05-31 | 1995-12-12 | Fuji Electric Co Ltd | Overcurrent trip device for circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201011306A (en) | 2010-03-16 |
| KR20100031050A (en) | 2010-03-19 |
| JP5322545B2 (en) | 2013-10-23 |
| CN101673929A (en) | 2010-03-17 |
| CN101673929B (en) | 2013-03-13 |
| KR101050354B1 (en) | 2011-07-19 |
| JP2010067514A (en) | 2010-03-25 |
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