JP4215625B2 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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JP4215625B2
JP4215625B2 JP2003394293A JP2003394293A JP4215625B2 JP 4215625 B2 JP4215625 B2 JP 4215625B2 JP 2003394293 A JP2003394293 A JP 2003394293A JP 2003394293 A JP2003394293 A JP 2003394293A JP 4215625 B2 JP4215625 B2 JP 4215625B2
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circuit breaker
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忠久 青木
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富士電機アセッツマネジメント株式会社
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Description

本発明は、配線用遮断器,漏電遮断器などを対象とした回路遮断器に関し、詳しくは回路遮断器に装備したトリップボタンの構造,機能に係わる。   The present invention relates to a circuit breaker for wiring breakers, earth leakage breakers, and the like, and more particularly to the structure and function of a trip button provided in the circuit breaker.

頭記した配線用遮断器,漏電遮断器は、主回路に過負荷,短絡電流,あるいは漏電電流が流れた際にこの異常電流を検知して主回路接点を開極動作させるものであり、周知のように主回路接点(可動および固定接触子),主回路接点の開閉機構(開閉ばねで蓄勢したトグルリンク機構),およびラッチ機構を介して開閉機構に連係させた引外し装置(過負荷電流,短絡電流,漏電電流に対応する各種引外し装置)の機能部品を組み合わせて遮断器ケースに組み込んだ構成になる。
また、この回路遮断器には、遮断器のトリップ動作が正常に機能するか否かを随時テストするために、「トリップボタン」と称するテスト用のボタンを装備しており、このトリップボタンを外部から手動で押し込み操作することにより、前記のラッチ機構を釈放して主回路接点を開極させるようにしている(例えば、特許文献1参照)。
The circuit breakers and earth leakage circuit breakers listed above detect the abnormal current when an overload, short circuit current, or earth leakage current flows in the main circuit, and open the main circuit contacts. The main circuit contact (movable and fixed contact), the main circuit contact switching mechanism (toggle link mechanism stored by the switching spring), and the tripping device linked to the switching mechanism via the latch mechanism (overload) The functional parts of various tripping devices that can handle current, short-circuit current, and leakage current are combined into a circuit breaker case.
In addition, this circuit breaker is equipped with a test button called “trip button” to test whether the trip operation of the breaker functions normally or not. By manually pushing in, the latch mechanism is released to open the main circuit contact (see, for example, Patent Document 1).

図5(a),(b) は上記のトリップボタンを装備した従来における回路遮断器の構成図であり、図において、1は下部ケース2と上部カバー3からなる遮断器ケース(樹脂モールドケース)、4は主回路端子(U,V,W相)、5は開閉操作ハンドルであり、図示してないが遮断器ケース1の内部には前記した主回路接点,開閉機構などの機能部品が組み込まれている。また、遮断器ケース1には前記のトリップボタン6が装備されている。このトリップボタン6は、図5(b) で示すように頂部の押しボタン部6a,軸部6b,操作部6cを形成した樹脂成形品になり、先記の特許文献1で詳しく述べられているように、復帰ばね(図示せず)と組み合わせて押しボタン部6aがカバー3上面に開口した穴に臨むように遮断器ケース1に組み込み、この位置で先端の操作部6cを器内のラッチ機構に対峙させている。   5 (a) and 5 (b) are block diagrams of a conventional circuit breaker equipped with the above trip button. In the figure, 1 is a circuit breaker case (resin mold case) comprising a lower case 2 and an upper cover 3. Reference numeral 4 is a main circuit terminal (U, V, W phase), and 5 is an opening / closing operation handle. Although not shown, the circuit breaker case 1 incorporates functional parts such as the main circuit contacts and the switching mechanism described above. It is. The circuit breaker case 1 is equipped with the trip button 6 described above. As shown in FIG. 5B, the trip button 6 is a resin molded product in which a top push button portion 6a, a shaft portion 6b, and an operation portion 6c are formed, and is described in detail in the above-mentioned Patent Document 1. In this manner, the push button portion 6a is combined with the return spring (not shown) so that the push button portion 6a faces the hole opened on the upper surface of the cover 3 and is installed in the circuit breaker case 1, and the operating portion 6c at the tip is latched in the device at this position. To confront.

そして、回路遮断器のトリップ機能をテストする際に、押しボタン部6aを手動で押し込むと先端の操作部6cがラッチ機構を釈放し、蓄勢状態にあった開閉機構の開閉ばねを放勢して主回路接点を開極動作させる。
一方、この回路遮断器に組み合わせて使用する外部付属(オプション品)の電圧引外し装置(外部から電気信号を与え、その動作により回路遮断器をトリップ動作させる),あるいは不足電圧引外し装置(主回路電圧が設定電圧以下に低下した際に動作して回路遮断器をトリップ動作させる)の出力端(トリップレバー)を前記のトリップボタン6に連係させ、電圧引外し装置,あるいは不足電圧引外し装置の動作時にトリップボタンを押し込んで回路遮断器をトリップ動作させるようにしたものが製品化されており、その従来製品の使用状態を図6に示す。
When the trip function of the circuit breaker is tested, when the push button portion 6a is manually pushed, the operation portion 6c at the tip releases the latch mechanism, and the open / close spring of the open / close mechanism in the stored state is released. Open the main circuit contact.
On the other hand, an external accessory (optional) voltage trip device used in combination with this circuit breaker (applying an electrical signal from the outside to trip the circuit breaker by its operation) or an undervoltage trip device (main The output terminal (trip lever) of the circuit breaker that trips when the circuit voltage drops below the set voltage is linked to the trip button 6 to provide a voltage trip device or an undervoltage trip device. The circuit breaker that has been tripped by pressing the trip button during the operation is commercialized, and the state of use of the conventional product is shown in FIG.

図6において、7は電圧引外し装置(あるいは不足電圧引外し装置)であり、該引外し装置7は図示のように回路遮断器の遮断器ケース1の側壁に装着し、この装着位置で引外し装置7の頂部から側方に突き出したトリップレバー7a(トリップレバーは引外し装置に組み込んだ電磁ソレノイドで駆動するようにしている)の突起を回路遮断器の遮断器ケース1に装備したトリップボタン6の上面に対峙させている。なお、回路遮断器の遮断器ケース1には、図5(a) で示すようにカバー3の前後端の側縁に外部付属の引外し装置7を取り付けるための楔形係合溝3aを形成しておき、この係合溝に引外し装置7のケース側壁に設けた係合突起7bを上方側から嵌入して定位置に取り付けるようにしている。
この使用状態で、引外し装置7が作動すると、そのトリップレバー7aが回路遮断器のトリップボタン6(図5(b) に示した押しボタン部6a)を下方に押し込んで回路遮断器をトリップ動作させる。
実用新案登録第2559969号公報
In FIG. 6, reference numeral 7 denotes a voltage trip device (or an undervoltage trip device). The trip device 7 is mounted on the side wall of the circuit breaker case 1 of the circuit breaker as shown in the drawing, and the trip device 7 is pulled at this mounting position. Trip button equipped with a trip lever 7a projecting sideways from the top of the tripping device 7 (the trip lever is driven by an electromagnetic solenoid incorporated in the tripping device) on the circuit breaker case 1 of the circuit breaker It faces the upper surface of 6. In the circuit breaker case 1 of the circuit breaker, a wedge-shaped engagement groove 3a for attaching an externally attached tripping device 7 is formed on the side edges of the front and rear ends of the cover 3 as shown in FIG. The engaging protrusion 7b provided on the case side wall of the tripping device 7 is fitted into the engaging groove from the upper side and attached to a fixed position.
When the tripping device 7 operates in this state of use, the trip lever 7a pushes the trip button 6 of the circuit breaker (the push button portion 6a shown in FIG. 5 (b)) downward to trip the circuit breaker. Let
Utility Model Registration No. 2559969

ところで、回路遮断器のトリップボタンとして、図5に示した構造のトリップボタン6を遮断器ケース1に組付けた従来構成の回路遮断器に対し、図6のように外部付属の引外し装置7(電圧引外し装置,あるいは不足電圧引外し装置)を組み合わせて使用した場合には、トリップボタン6の上面を引外し装置7の出力レバー7aが覆い隠すことになる。このために、トリップボタン6を直接手動で押して回路遮断器が正常にトリップ動作するか否かを点検するトリップボタン自身の本来のテスト機能が果たせなくなる。
本発明は上記の点に鑑みなされたものであり、その目的は前記課題を解決し、トリップボタンを手動により直接操作して回路遮断器をトリップ動作させるテスト機能を確保しつつ、同時にこの回路遮断器に外部付属の電圧引外し装置,あるいは不足電圧引外し装置を取り付けて使用する場合に、その動作出力をトリップボタンに伝えて回路遮断器をトリップできるように改良した回路遮断器を提供することにある。
By the way, as a trip button of a circuit breaker, a tripping device 7 attached to the outside as shown in FIG. When used in combination (voltage trip device or undervoltage trip device), the upper surface of trip button 6 is tripped and output lever 7a of device 7 is obscured. For this reason, the trip button 6 is manually pressed directly to check whether the circuit breaker normally trips or not, and the original test function of the trip button itself cannot be performed.
The present invention has been made in view of the above points. The object of the present invention is to solve the above-mentioned problems and to secure a test function for tripping the circuit breaker by directly operating the trip button manually, and at the same time interrupting the circuit. To provide an improved circuit breaker so that the circuit breaker can be tripped by transmitting its operation output to the trip button when the external voltage trip device attached to the device or the undervoltage trip device is used. It is in.

上記目的を達成するために、本発明によれば、主回路接点, 主回路接点の開閉機構, およびラッチ機構を介して開閉機構に連係した引外し装置を搭載した遮断器ケースにトリップボタンを付設し、該トリップボタンの押し込み操作により前記ラッチ機構を釈放して主回路接点を開極動作させるようにした回路遮断器において、
前記トリップボタンにはその頂部の押しボタン部と別に軸部側方に張り出した操作突起部を設けた上で、該操作突起部を外部付属の引外し装置と対応させるように遮断器ケースの側壁に開口した窓穴に臨ませて配置する(請求項1)ものとし、具体的には次記のような態様で実施する。
(1) 遮断器ケースの側壁に外部付属の引外し装置を装着した状態で、該引外し装置のトリップレバーを遮断器ケースの窓穴を通じてトリップボタンに設けた操作突起部の上側に対峙させ、外部付属引外し装置の動作時にトリップボタンを押し込んで主回路接点を開極動作させるようにする(請求項2)。
To achieve the above object, according to the present invention, a trip button is attached to a circuit breaker case equipped with a main circuit contact, a switching mechanism for the main circuit contact, and a tripping device linked to the switching mechanism via a latch mechanism. In a circuit breaker that releases the latch mechanism by pushing the trip button and opens the main circuit contact,
The trip button is provided with an operation projection that protrudes to the side of the shaft separately from the push button on the top of the trip button, and the side wall of the circuit breaker case is made to correspond to the trip device attached to the outside. It is arranged so as to face the window hole opened in (Claim 1), and specifically, it is carried out in the following manner.
(1) With the trip device attached externally attached to the side wall of the circuit breaker case, the trip lever of the trip device faces the upper side of the operation projection provided on the trip button through the window hole of the circuit breaker case, When the external attached trip device is operated, the trip button is pushed to open the main circuit contact (claim 2).

(2) 回路遮断器に装着して使用する前記の外部付属の引外し装置は、そのケース側面から回路遮断器に設けたトリップボタンの前記操作突起部に向けて突き出すトリップレバーを備えた電圧引外し装置,もしくは不足電圧引外し装置である(請求項3)。   (2) The external tripping device attached to the circuit breaker is used with a voltage trip provided with a trip lever protruding from the side of the case toward the operation projection of the trip button provided on the circuit breaker. A disconnecting device or an undervoltage tripping device.

上記の構成によれば、回路遮断器に外部付属の電圧引外し装置,あるいは不足電圧引外し装置を装着した使用状態でも、この外部付属の引外し装置に邪魔されることなく、回路遮断器のトリップボタンを手動で自由に押し込み操作してトリップ動作テストを随時行うことができる。しかも、外部付属の引外し装置の動作時には、そのトリップレバーがトリップボタンに形成した操作突起部を押し込んで回路遮断器をトリップ動作させることができ、これによりトリップボタンの本来のテスト機能を確保しつつ、同時にこのトリップボタンを利用して外部付属の引外し装置の操作で回路遮断器をトリップ動作させることができて使い勝手性が向上する。   According to the above configuration, even when the circuit breaker is equipped with an external voltage trip device or an undervoltage trip device, the circuit breaker is not disturbed by the external trip device. A trip operation test can be performed at any time by manually pressing the trip button. In addition, when the tripping device attached to the outside is in operation, the trip lever can push the operating projection formed on the trip button to trip the circuit breaker, thereby ensuring the original test function of the trip button. At the same time, this trip button can be used to trip the circuit breaker by operating an externally attached tripping device, thereby improving usability.

以下、本発明の実施の形態を図1〜図4に示す実施例に基づいて説明する。なお、実施例の図中で図5,図6に対応する部材には同じ符号を付してその説明は省略する。
図示実施例において、回路遮断器の遮断器ケース1に装備したトリップボタン6には、図1(b) で示すように頂部の押しボタン部6aから軸部6bの側方に張り出す操作突起部6dが一体に形成してあり、トリップボタン6はこの操作突起部6dを遮断器ケース1のカバー側壁に開口した窓穴3bに臨ませて配置されている。
一方、図示実施例の回路遮断器に付属させて使用する外部付属の電圧引外し装置7(あるいは不足電圧引外し装置)は、図3で示すようにトリップレバー7aをケースから側方に突き出しており、同じケース側面には左右に並んで楔状の係合突起7bが形成されている。そして、この電圧引外し装置7を回路遮断器に装着する際には、遮断器ケース1のケース上面に設けた補助カバー3cを開いた上で、カバー側面に形成した係合溝3a(図1参照)に前記係合突起7bを上方から嵌入し、図2のように回路遮断器の外部付属装置として遮断器ケース1の側面に電圧引外し装置7を装着する。
Embodiments of the present invention will be described below based on the examples shown in FIGS. In the drawing of the embodiment, members corresponding to those in FIG. 5 and FIG.
In the illustrated embodiment, the trip button 6 provided in the circuit breaker case 1 of the circuit breaker has an operation protrusion protruding from the top push button portion 6a to the side of the shaft portion 6b as shown in FIG. 1 (b). 6 d is integrally formed, and the trip button 6 is arranged with the operation projection 6 d facing the window hole 3 b opened in the cover side wall of the circuit breaker case 1.
On the other hand, the external voltage trip device 7 (or the undervoltage trip device) used by attaching to the circuit breaker of the illustrated embodiment has a trip lever 7a protruding from the case to the side as shown in FIG. In addition, wedge-shaped engaging projections 7b are formed on the same case side surface side by side. When the voltage trip device 7 is mounted on the circuit breaker, the auxiliary cover 3c provided on the upper surface of the circuit breaker case 1 is opened and the engaging groove 3a formed on the side surface of the cover (FIG. 1). The engagement protrusion 7b is inserted from above into the reference), and the voltage tripping device 7 is mounted on the side surface of the circuit breaker case 1 as an external accessory device of the circuit breaker as shown in FIG.

この装着状態では図4の断面図で表すように電圧引外し装置7のケースから側方に突き出たトリップレバー7aが回路遮断器のカバー側壁に開口した窓穴3b(図1参照)を通じてトリップボタン6の操作突起部6dの上面に対峙している。ここで、電圧引外し装置7にトリップ信号が与えられると、そのケース内に組み込まれている電磁ソレノイドの駆動でトリップレバー7aが下降し、トリップボタン6の操作突起部6dを押し下げて回路遮断器をトリップ動作させる。
また、回路遮断器に電圧引外し装置7を装着した状態(図2参照)でも、トリップボタン6は頂部の押しボタン部6aが遮断器ケース1のカバー上面に露呈しているので、電圧引外し装置7に邪魔されることなく、必要時にはトリップボタン6を手動で直接押し込み操作して回路遮断器のトリップ動作テストが行える。
In this mounted state, as shown in the sectional view of FIG. 4, the trip lever 7a protruding sideways from the case of the voltage trip device 7 is trip button through a window hole 3b (see FIG. 1) opened in the cover side wall of the circuit breaker. 6 is opposed to the upper surface of the operation projection 6d. Here, when a trip signal is given to the voltage trip device 7, the trip lever 7a is lowered by driving of an electromagnetic solenoid incorporated in the case, and the operation projection 6d of the trip button 6 is pushed down, thereby circuit breaker. Is tripped.
Even when the voltage tripping device 7 is mounted on the circuit breaker (see FIG. 2), the trip button 6 has the top push button portion 6a exposed on the upper surface of the cover of the breaker case 1, so that the voltage tripping Without being interrupted by the device 7, when necessary, the trip button 6 can be manually pushed directly to perform a trip operation test of the circuit breaker.

本発明の実施例の構成図で、(a) は回路遮断器全体の外観斜視図、(b) はトリップボタンの拡大外形図BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the Example of this invention, (a) is the external appearance perspective view of the whole circuit breaker, (b) is the expanded external view of a trip button. 図1(a) の回路遮断器に外部付属の電圧引外し装置を装着した使用状態の外観斜視図External perspective view of the circuit breaker in Fig. 1 (a) with the attached external voltage trip device 図2における電圧引外し装置を装着面側から見た外観斜視図FIG. 2 is an external perspective view of the voltage trip device in FIG. 2 viewed from the mounting surface side. 図2における矢視X−Xの拡大断面図FIG. 2 is an enlarged sectional view taken along line XX in FIG. 従来における回路遮断器の構成図で、(a) は全体の外観斜視図、(b) はトリップボタンの拡大外形図It is a block diagram of a conventional circuit breaker, (a) is a perspective view of the overall appearance, (b) is an enlarged outline view of a trip button. 図5(a) の回路遮断器に従来の外部付属電圧引外し装置を装着した使用状態の外観斜視図External perspective view of the circuit breaker shown in Fig. 5 (a) with a conventional external voltage trip device installed.

符号の説明Explanation of symbols

1 遮断器ケース
3 カバー
3b 窓穴
6 トリップボタン
6a 押しボタン部
6b 軸部
6d 操作突起部
7 電圧引外し装置(外部付属装置)
7a トリップレバー
DESCRIPTION OF SYMBOLS 1 Circuit breaker case 3 Cover 3b Window hole 6 Trip button 6a Push button part 6b Shaft part 6d Operation protrusion part 7 Voltage trip device (external accessory device)
7a Trip lever

Claims (3)

主回路接点, 主回路接点の開閉機構, およびラッチ機構を介して開閉機構に連係した引外し装置を搭載した遮断器ケースにトリップボタンを付設し、該トリップボタンの押し込み操作により前記ラッチ機構を釈放して主回路接点を開極動作させるようにした回路遮断器において、
前記トリップボタンにはその頂部の押しボタン部と別に軸部側方に張り出した操作突起部を設けた上で、該操作突起部を外部付属の引外し装置と対応させるように遮断器ケースの側壁に開口した窓穴に臨ませて配置したことを特徴とする回路遮断器。
A trip button is attached to the circuit breaker case equipped with a trip circuit linked to the opening / closing mechanism via the main circuit contact, the opening / closing mechanism of the main circuit contact, and the latch mechanism, and the latch mechanism is released by pushing the trip button. In the circuit breaker that opens the main circuit contact,
The trip button is provided with an operation projection that protrudes to the side of the shaft separately from the push button on the top of the trip button, and the side wall of the circuit breaker case is made to correspond to the trip device attached to the outside. A circuit breaker characterized by being placed facing the window hole opened in the window.
請求項1に記載の回路遮断器において、遮断器ケースの側壁に外部付属の引外し装置を装着した状態で、該引外し装置のトリップレバーを遮断器ケースの窓穴を通じてトリップボタンに設けた操作突起部の上側に対峙させ、外部付属引外し装置の動作時にトリップボタンを押し込んで主回路接点を開極動作させるようにしたことを特徴とする回路遮断器。 2. The circuit breaker according to claim 1, wherein the trip lever of the tripping device is provided on the trip button through the window hole of the circuit breaker case in a state where the externally attached tripping device is mounted on the side wall of the circuit breaker case. A circuit breaker that faces the upper side of the protrusion and pushes the trip button to open the main circuit contact during operation of the external attached trip device. 請求項2記載の回路遮断器において、当該回路遮断器に装着して使用する外部付属の引外し装置が、回路遮断器に設けたトリップボタンの操作突起部に向けてケース側面より突き出すトリップレバーを備えた電圧引外し装置,もしくは不足電圧引外し装置であることを特徴とする回路遮断器。 3. The circuit breaker according to claim 2, wherein the tripping device attached to the circuit breaker for use is provided with a trip lever protruding from the side of the case toward the operation projection of the trip button provided on the circuit breaker. A circuit breaker comprising a voltage trip device provided or an undervoltage trip device.
JP2003394293A 2003-11-25 2003-11-25 Circuit breaker Expired - Fee Related JP4215625B2 (en)

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JP4597793B2 (en) * 2005-06-30 2010-12-15 三菱電機株式会社 Circuit breaker
CZ300117B6 (en) * 2006-01-25 2009-02-11 Oez, S. R. O. External push button for electric apparatus, particularly for power circuit breaker
JP5971584B2 (en) * 2012-04-09 2016-08-17 パナソニックIpマネジメント株式会社 Circuit breaker external trip device
JP5971585B2 (en) * 2012-04-09 2016-08-17 パナソニックIpマネジメント株式会社 Circuit breaker external trip device

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