JP3952855B2 - Switch unit attached to circuit breaker - Google Patents

Switch unit attached to circuit breaker Download PDF

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Publication number
JP3952855B2
JP3952855B2 JP2002152662A JP2002152662A JP3952855B2 JP 3952855 B2 JP3952855 B2 JP 3952855B2 JP 2002152662 A JP2002152662 A JP 2002152662A JP 2002152662 A JP2002152662 A JP 2002152662A JP 3952855 B2 JP3952855 B2 JP 3952855B2
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Prior art keywords
alarm
circuit breaker
contact
contact mechanism
switch unit
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JP2002152662A
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JP2003346634A (en
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武史 江村
浩司 浅川
勝典 久保山
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、オートブレーカなどの回路しゃ断器に付属させて、回路しゃ断器のオン,オフおよびトリップ状態を電気信号として表示する回路しゃ断器の付属スイッチユニットに関する。
【0002】
【従来の技術】
頭記した回路しゃ断器の付属スイッチユニットとして、そのユニットケース内に、回路しゃ断器のオン,オフ動作に従動して接点を開,閉する補助接点機構、および回路しゃ断器のトリップ動作に従動して接点を閉じる警報接点機構とを連繋して内蔵し、かつ補助接点機構は駆動レバーを介してしゃ断器本体の開閉軸に連繋し、警報接点機構はラッチを介してしゃ断器本体の警報出力板に従動する警報動作レバーに連繋させた構成のものが本発明と同一出願人より特開2001−160350号として提案されている。
【0003】
次に、前記提案になる付属スイッチユニットの構造,動作を図6,図7で説明する。なお、図6(a),(b) は回路しゃ断器をONに投入した状態を、図7(a),(b) は回路しゃ断器がトリップ動作した状態を表している。
各図において、1は回路しゃ断器2の付属装置(オプション品)としてしゃ断器本体の側面に装着した付属スイッチユニット、3は付属スイッチユニット1のユニットケースであり、該ユニットケース3には次記構成になる補助接点機構4,および警報接点機構5を内蔵している。
【0004】
ここで、補助接点機構4は、固定接触子4aと,可動接触子(橋絡形)4bと、該可動接触子4bおよび接触ばね4cを保持した接触子ホルダ4dからなり、接触子ホルダ4dは、ユニットケース1の中で上下方向にスライド可能に案内支持するとともに、ホルダに係合した回動式の駆動レバー4eを介して回路しゃ断器2の開閉軸2a(回路しゃ断器をハンドル操作でON,OFF位置に切換えると、ハンドルの切換え操作に連動して開閉軸2aが時計方向,反時計方向に回動してしゃ断器の主回路接点を閉極,開極させる)に連結されている。
【0005】
かかる構成で、回路しゃ断器2がOFFであれば、接触子ホルダ4dは下降して可動接触子4bは固定接触子4aから開離している。また、回路しゃ断器2をONに切換えると、開閉軸2aが反時計方向に回動し、これに従動して接触子ホルダ4dが図示位置から上方にスライド移動して可動接触子4bが固定接触子4aに接触する。これにより、補助接点機構4から回路しゃ断器ONの電気信号が出力される。
【0006】
一方、前記補助接点機構4の上方側に配置した警報接点機構5は、固定接触子5aと、可動接触子(橋絡形)5bと、該可動接触子5bとその接触ばね5cを保持した接触子ホルダ5dと、接触子ホルダ5dを押し下げる方向に付勢する駆動ばね(圧縮ばね)5eからなり、接触子ホルダ5dは、前記補助接点機構4の接触子ホルダ4dの上側に並べてスライド可能にユニットケース3へ案内支持した上で、接触子ホルダ5dの上端から側方に延在するラッチ板5fが、その先端に対峙する警報動作レバー6を介して回路しゃ断器2の警報出力板2b(主回路に過負荷,短絡電流が流れて回路しゃ断器がトリップ動作すると、このトリップ動作に連動して警報出力板2bがその上端を支点に時計方向に揺動する)に連繋されている。
【0007】
ここで、前記の警報動作レバー6は、図6(b),図7(b) で示すように下部先端を回路しゃ断器2のケース内部に突き出して前記警報出力板2bの脚部にその移動軌跡と交差するように対峙させ、上端側に形成した係合段部を前記ラッチ板5fに対峙させた樹脂成形品のレバー6aと、該レバー6aに一体成形した支軸6bと、レバー6aを時計方向に付勢する復帰ばね6cとからなる。なお、6dはレバー6aの上端に設けた警報表示部で、この警報表示部6dに対向してユニットケース3の上面には警報表示窓3aを備えている。
【0008】
かかる構成で、常時は警報動作レバー6がラッチ板5fを図6(b) に示す位置に係止しており、これにより接触子ホルダ5dは上昇位置に保持されて可動接触子5bは固定接触子5aから開離している。ここで、ON状態にある回路しゃ断器2がトリップ動作して警報出力板2が図7(b) で表すように時計方向に揺動すると、その揺動途上で警報動作レバー6のレバー先端を押し下げる。これにより、レバー6aは復帰ばね6cに抗して時計方向に揺動してラッチ板5fとの係合を外すとともに、ラッチ板5fの釈放により警報接点機構5の接触子ホルダ5dは駆動ばね5eに押されて下降し、補助接点機構4の接触子ホルダ4dの上に重なるようになる。その結果、固定接触子5aと可動接触子5bとが閉極し、警報接点機構5から回路しゃ断器2がトリップ動作したことを電気信号として出力する。また、前記動作と同時に、警報動作レバー6の警報表示部6dが図7(b) のように警報表示窓3aの下に移動して回路しゃ断器2のトリップ動作状態を表示する。
【0009】
なお、回路しゃ断器2のトリップ動作後に、そのハンドルをリセット操作して再投入すると、開閉軸2a,駆動レバー4eを介して補助接点機構4の接触子ホルダ4dが図7(a) の位置から上方にスライド移動するとともに、この接触子ホルダ4dに押されて警報接点機構5の接触子ホルダ5dが上昇して可動接触子5bが固定接触子5aから開離する。また、同時にラッチ板5fも上昇移動するので、これにより警報動作レバー6は復帰ばね6cのばね力により図6(b) の位置に復帰して再びラッチ板5fをリセット位置に係合保持する。
【0010】
上記の付属スイッチユニット1では、ユニットケース3に1組の補助接点機構4と警報接点機構5を内蔵している。一方、これとは別に図8(a),(b) で示すようにユニットケース3に二組の補助接点を有する補助接点機構4を内蔵した付属スイッチユニットの製品も知られている。
すなわち、図8の付属スイッチユニット1においては、図6,図7で述べた先記構成の付属スイッチユニットから、警報接点機構5の関連部品である接触子ホルダ5d,ラッチ板5fおよび警報動作レバー6などの部品を取り除いた上で、補助接点機構4には、固定接触子4a,可動接触子4bを組にした二組の補助接点(上側の補助接点はb接点、下側の補助接点はa接点)を装備し、各組の可動接触子4bを共通な接触子ホルダ4dに保持した上で、この接触子ホルダ4dが回路しゃ断器の開閉軸2aに結合した駆動レバー4eと連結した構成になる。
【0011】
かかる構成で、回路しゃ断器をON操作すると、付属スイッチユニット1では、図8(a) のように反時計方向に回動する開閉軸2aに従動して接触子ホルダ4dが上昇して二組の補助接点のうち下側の補助接点(a接点)が閉極し、上側の補助接点(b接点)が開極する。また、回路しゃ断器をOFF操作すると、図8(b) のように下側の補助接点(a接点)が開極し、上側の補助接点(b接点)が閉極する。これにより、1台の付属スイッチユニットで、回路しゃ断器のON,OFFそれぞれの状態に対応した二種類の電気信号を表示することかできる。
【0012】
【発明が解決しようとする課題】
ところで、回路しゃ断器を入手したユーザーが、その付属装置として補助接点機構4と警報接点機構5を内蔵した付属スイッチユニット(図6,図7参照)を購入したが、その後にユーザー側の設備変更などで警報接点が不要となり、その代わりに二組の補助接点が必要となった場合に、ユーザーは新たに図8に示した付属スイッチユニットを購入して既設の付属スイッチユニットと交換する必要があり、このためにユーザーには新たな費用の負担が発生する。
【0013】
そこで、本発明の目的は、補助接点機構と警報接点機構を内蔵した付属スイッチユニットについて、新たな部品の追加,改造を必要とせずに、警報接点機構の部品一部を設定替えするだけで、警報接点機構を補助接点機構として使用できるように改良した汎用性の高い回路しゃ断器の付属スイッチユニットを提供することにある。
【0014】
【課題を解決するための手段】
上記目的を達成するために、本発明によれば、回路しゃ断器のオン,オフおよびトリップ状態を電気信号として出力する回路しゃ断器の付属スイッチユニットであり、そのユニットケース内に、回路しゃ断器のオン,オフ操作に連動して接点を開,閉する補助接点機構、および回路しゃ断器のトリップ動作に連動して接点を閉じる警報接点機構とを連繋して内蔵し、かつ補助接点機構は駆動レバーを介してしゃ断器本体の開閉軸に連繋し、警報接点機構はラッチを介してしゃ断器本体の警報出力板に従動する警報動作レバーに連繋させた構成になるものにおいて、
前記警報動作レバーを警報接点機構に設けたラッチとの連繋位置,および該ラッチから切り離した非連繋位置に移動する設定手段を備え、警報動作レバーを連繋位置から非連繋位置に移動して前記ラッチと切り離すことにより、警報接点機構の接点を前記の補助接点機構と連動する第2の補助接点として機能させるようにする(請求項1)。
【0015】
上記の構成において、警報接点機構に連繋した警報動作レバーを連繋位置に設定しておけば、当該付属スイッチユニットに内蔵した補助接点機構により回路しゃ断器のオン,オフを、また警報接点機構により回路しゃ断器のトリップ動作を電気信号で表示できる。一方、警報動作レバーを連繋位置から非連繋位置に切換えると、警報接点機構は補助接点機構として機能するようになる。つまり、新しい部品を追加したり,構造を変更することなしに、付属スイッチユニットの仕様を、必要に応じて補助接点と警報接点との組合せから、二組の補助接点の組合せに変更したり、また元の組合せに戻すことが可能となる。
【0016】
また、前記構成の付属スイッチユニットにおいて、警報動作レバーを連繋位置,非連繋位置に切換える設定手段は、具体的に次記のような態様で対応させることができる。
(1) 警報動作レバーをその支軸を介して連繋位置と非連繋位置との間で軸方向へスライド移動可能に支持した上で、該レバーを非連繋位置に係止して拘束保持するようにする(請求項2)。
【0017】
(2) 警報動作レバーをその支軸を介して連繋位置と非連繋位置との間で回動移動可能に支持した上で、該レバーを非連繋位置に係止して拘束保持するようにする(請求項3)。
【0018】
【発明の実施の形態】
以下、本発明の実施の形態を図1〜図5に示す実施例に基づいて説明する。なお、各実施例の図中で、図6,図7に対応する部材には同じ符号を付してその詳細な説明は省略する。
まず、図1(a) に示す付属スイッチユニットは、基本的に図6に示した従来構造と同様であり、ユニットケース3の内部には補助接点機構4と警報接点機構5を内蔵し、警報接点機構5のラッチ板5fが警報動作レバー6を介して図7(b) に示した回路しゃ断器2の警報出力板2bに連繋している。
【0019】
ここで、図示実施例においては、図1(b),(c) で表すように、警報接点機構のラッチ板5fに対して、警報動作レバー6をレバー6aがラッチ板5fの先端と重なり合う連繋位置Aと、ラッチ板5fの先端から側方に移動した非連繋位置Bを設定して各位置に保持するようにしている。そのために、レバー(樹脂成形品)6aに一体成形した支軸6bを左右の軸受6eの間に跨がって軸方向にスライド移動可能に軸支するとともに、この支軸6bの右側の軸上周面には係合突起6b-1を設け、レバー6aを非連繋位置Bにスライド移動した状態(図1(c) 参照)で前記係合突起6b-1を軸受6eの内周面に圧入してレバー6aをこの位置に係止保持するようにしている。
【0020】
そして、警報接点機構5を使って回路しゃ断器のトリップ動作を表示させるには、警報動作レバー6を図1(b) の連繋位置Aにセットする。これにより、図6(a),(b) と同様に警報動作レバー6とラッチ板5fとが連繋される。そして、この状態から回路しゃ断器がトリップ動作すると、図7(a),(b) で述べたように警報出力板2bの動きに従動してラッチ板5fが釈放され、これにより図2で表すように警報接点機構5の接触子ホルダ5dが下降移動して可動接触子5bが固定接触子5aに接触して外部に電気信号を出力する。
【0021】
一方、警報動作レバー6を左側にスライド移動して図1(c) の非連繋位置Bにセットすると、レバー6aがラッチ板5fから側方に離脱して、ラッチ板5fの拘束を釈放する。これにより、回路しゃ断器がOFFであれば、警報接点機構5の接触子ホルダ5dは駆動ばね5eのばね付勢を受けて下降し、図3のように補助接点機構4の接触子ホルダ4dの上に重なり合うとともに、この位置で可動接触子5bが固定接触子5bに接触した状態に保持される。
【0022】
また、ここから回路しゃ断器をONに投入操作すると、開閉軸2a,駆動レバー4eを介して補助接点機構4の接触子ホルダ4dが上昇して可動接触子4bが固定接触子4aに接触すると同時に、警報接点機構5の接触子ホルダ5dが補助接点機構4の接触子ホルダ4dと一緒に上方に押し上げられて可動接触子5bが固定接触子5aから開離する。なお、この状態で回路しゃ断器がトリップ動作しても、警報動作レバー6が非連繋位置Bに移動しているので、警報出力板2bの動きが警報動作レバー6を介してラッチ板5fに伝達されることはない。
【0023】
したがって、警報動作レバー6を非連繋位置Bに設定することで、警報接点機構5の接点は補助接点機構4と連動して開閉する第2の補助接点(b接点)として機能する。これにより、付属スイッチユニット1を、図8で述べた二組の補助接点を内蔵した補助スイッチに変更して使用できる。なお、警報動作レバー6を非連繋位置Bから連繋位置Aに戻せば、警報接点機構5の接点は再び警報接点として機能するようになる。
【0024】
次に、警報動作レバー6を非連繋位置Bに係止保持する手段についての応用実施例を図4,図5に示す。すなわち、図1(b),(c) の実施例では、レバー6aの支軸6bに係合突起6b-1を設けてレバーを非連繋位置Bに係止保持するようにしているのに対して、図4の応用実施例では、警報動作レバー6のレバー先端を回路しゃ断器2へ突き出すようユニットケース3に側面に開口した角穴3bに連ねてその側方(非連繋位置側)にレバー引き入れ溝3b-1を切欠した上で、該溝の内縁に係合突起3b-2を形成し、警報動作レバー6を連繋位置から非連繋位置Bにスライド移動した状態でレバー6aの先端を前記溝3b-1に圧入してこの位置に係止保持するようにしている。
【0025】
また、図5(a),(b) に示す応用実施例では、前記の各実施例とは異なり、警報動作レバー6の非連繋位置Bを図5(a) のようにレバー6aを最大に前傾させた位置(この位置は回路しゃ断器の警報出力板2b(図6(b) 参照)の移動軌跡から外れており、回路しゃ断器がトリップ動作した場合でも、警報出力板2bの動きが警報動作レバー6に伝達されない)に設定し、この位置でレバー6aの左右側縁に形成した係合突起6a-1をユニットケース3に開口した角穴3bに圧入して係止保持する。この非連繋位置Bでは、警報動作レバー6がラッチ板5fから前方に離脱してその拘束を釈放する。これにより、先記の実施例と同様に警報接点機構の接点が補助接点として機能するようになる。また、角穴3b側に係合突起を形成してレバー6aを圧入して係止保持させるようにしてもよい。
【0026】
【発明の効果】
以上述べたように、本発明によれば、ユニットケース内に、回路しゃ断器のオン,オフ動作に連動して接点を開,閉する補助接点機構、および回路しゃ断器のトリップ動作に連動して接点を閉じる警報接点機構とを連繋して内蔵し、かつ補助接点機構は駆動レバーを介してしゃ断器本体の開閉軸に連繋し、警報接点機構はラッチを介してしゃ断器本体の警報出力板に従動する警報動作レバーに連繋させた構成になる回路しゃ断器の付属スイッチユニットにおいて、前記警報動作レバーを警報接点機構に設けたラッチとの連繋位置,および該ラッチから切り離した非連繋位置に移動させる設定手段を備え、警報動作レバーを連繋位置から非連繋位置に移動して前記ラッチと切り離すことにより、警報接点機構の接点を前記の補助接点機構と連動する第2の補助接点として機能させるようにしたことにより、次記の効果を奏する。
【0027】
すなわち、上記の構成で、警報接点機構に連繋した警報動作レバーを連繋位置に設定しておけば、当該付属スイッチユニットに内蔵した補助接点機構により回路しゃ断器のオン,オフを、また警報接点機構により回路しゃ断器のトリップ動作を電気信号で表示できる。一方、警報動作レバーを連繋位置から非連繋位置に切換えると、警報接点機構は補助接点機構として機能するようになる。つまり、新しい部品を追加したり,構造を変更することなしに、警報動作レバーの位置を設定替えするだけで、付属スイッチユニットの仕様を、必要に応じて補助接点と警報接点との組合せから、二組の補助接点の組合せに変更したり、また元の組合せに戻すことが可能となる。これにより、製造メーカーでは付属スイッチユニットの系列機種を少なくしてコストの低減化が図れるとともに、ユーザーに対するサービス性の向上が図れる。
【図面の簡単な説明】
【図1】本発明の実施例による付属スイッチユニットの構成図で、(a) は警報動作レバーを連繋位置にセットした状態で回路しゃ断器がOFF時の動作を表すユニット全体の内部構造図、(b),(c) はそれぞれ(a) における警報動作レバーを連繋位置,非連繋位置にセットした状態での正面拡大図
【図2】図1の付属スイッチユニットについて、警報動作レバーを連繋位置にセットした状態で回路しゃ断器がトリップ時の動作を表す図
【図3】図1の付属スイッチユニットにおいて、警報動作レバーを非連繋位置にセットした状態で回路しゃ断器がOFF時の動作を表す図
【図4】警報動作レバーを非連繋位置に係止保持する手段についての、図1と異なる応用実施例の構成図
【図5】警報動作レバーを非連繋位置に係止保持する手段についての、図4とさらに異なる応用実施例の構成図で、(a),(b) はそれぞれ側面図,および正面図
【図6】補助接点機構と警報設定機構を内蔵した従来における付属スイッチユニットの構成図で、(a) は回路しゃ断器がOFF時の状態を表すユニット全体の内部構造図、(b) は(a) における警報動作レバーと回路しゃ断器の警報出力板との連繋構造を表す側視断面図
【図7】図6において、回路しゃ断器がトリップ時の動作を表す図であり、(a),(b) はそれぞれ図6(a),(b) に対応したトリップ動作状態図
【図8】二組の接点を有する補助接点機構を内蔵した従来における付属スイッチユニットの構成図で、(a),(b) はそれぞれ回路しゃ断器のON,OFF時の動作状態を表す図
【符号の説明】
1 付属スイッチユニット
2 回路しゃ断器
2a 開閉軸
2b 警報出力板
3 ユニットケース
3b 角穴
3b-1 レバー引き入れ溝
3b-2 係合突起
4 付属接点機構
4a 固定接触子
4b 可動接触子
4d 接触子ホルダ
4e 駆動レバー
5 警報接点機構
5a 固定接触子
5b 可動接触子
5d 接触子ホルダ
5e 駆動ばね
5f ラッチ板
6 警報動作レバー
6a レバー
6a-1 係合突起
6b 支軸
6b-1 係合突起
6c 復帰ばね
6d 軸受
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an attached switch unit of a circuit breaker that is attached to a circuit breaker such as an auto breaker and displays on / off and trip states of the circuit breaker as electrical signals.
[0002]
[Prior art]
As the attached switch unit of the circuit breaker mentioned above, the auxiliary contact mechanism that opens and closes the contact by following the on / off operation of the circuit breaker and the trip operation of the circuit breaker in the unit case The alarm contact mechanism that closes the contact is built in, and the auxiliary contact mechanism is linked to the open / close shaft of the breaker body via the drive lever, and the alarm contact mechanism is connected to the alarm output plate of the breaker body via the latch. Japanese Patent Laid-Open No. 2001-160350 has been proposed by the same applicant as that of the present invention in a configuration in which it is linked to an alarm operation lever to be driven.
[0003]
Next, the structure and operation of the proposed accessory switch unit will be described with reference to FIGS. 6A and 6B show a state where the circuit breaker is turned on, and FIGS. 7A and 7B show a state where the circuit breaker has tripped.
In each figure, 1 is an accessory switch unit mounted on the side of the circuit breaker body as an accessory device (optional product) of the circuit breaker 2, and 3 is a unit case of the accessory switch unit 1. The auxiliary contact mechanism 4 and the alarm contact mechanism 5 that are configured are incorporated.
[0004]
Here, the auxiliary contact mechanism 4 includes a fixed contact 4a, a movable contact (bridge shape) 4b, and a contact holder 4d that holds the movable contact 4b and the contact spring 4c. In the unit case 1, it is guided and supported so as to be slidable in the vertical direction, and the opening / closing shaft 2a of the circuit breaker 2 (the circuit breaker is turned on by a handle operation) via a rotary drive lever 4e engaged with the holder. When the switch is switched to the OFF position, the open / close shaft 2a is rotated clockwise or counterclockwise in conjunction with the handle switching operation to close or open the main circuit contact of the circuit breaker.
[0005]
With this configuration, if the circuit breaker 2 is OFF, the contact holder 4d is lowered and the movable contact 4b is separated from the fixed contact 4a. When the circuit breaker 2 is switched to ON, the opening / closing shaft 2a rotates counterclockwise, and the contact holder 4d slides upward from the position shown in the figure to move the movable contact 4b in a fixed contact. Contact the child 4a. As a result, an electric signal for circuit breaker ON is output from the auxiliary contact mechanism 4.
[0006]
On the other hand, the alarm contact mechanism 5 disposed above the auxiliary contact mechanism 4 includes a fixed contact 5a, a movable contact (bridge) 5b, and a contact that holds the movable contact 5b and its contact spring 5c. It comprises a child holder 5d and a drive spring (compression spring) 5e that urges the contactor holder 5d in a downward direction, and the contactor holder 5d is slidable side by side above the contactor holder 4d of the auxiliary contact mechanism 4 The latch plate 5f extending laterally from the upper end of the contact holder 5d after being guided to and supported by the case 3 is connected to the alarm output plate 2b (main main circuit breaker 2) via the alarm operation lever 6 facing the tip. When the circuit breaker trips due to an overload or short-circuit current flowing in the circuit, the alarm output plate 2b is linked in a clockwise direction with its upper end as a fulcrum in conjunction with the trip operation.
[0007]
Here, as shown in FIGS. 6 (b) and 7 (b), the alarm operation lever 6 protrudes into the case of the circuit breaker 2 and moves to the leg of the alarm output plate 2b. A lever 6a of a resin molded product that is opposed to intersect with the locus and has an engagement step formed on the upper end side opposed to the latch plate 5f, a support shaft 6b that is integrally formed with the lever 6a, and a lever 6a It comprises a return spring 6c that urges clockwise. Reference numeral 6d denotes an alarm display section provided at the upper end of the lever 6a. The alarm display window 6a is provided on the upper surface of the unit case 3 so as to face the alarm display section 6d.
[0008]
With such a configuration, the alarm operation lever 6 normally locks the latch plate 5f at the position shown in FIG. 6 (b), whereby the contact holder 5d is held in the raised position and the movable contact 5b is fixed contact. It is separated from the child 5a. Here, when the circuit breaker 2 in the ON state trips and the alarm output plate 2 swings clockwise as shown in FIG. 7 (b), the lever tip of the alarm operation lever 6 is moved during the swinging. Press down. As a result, the lever 6a swings clockwise against the return spring 6c to disengage the latch plate 5f, and the contact holder 5d of the alarm contact mechanism 5 is driven by the drive spring 5e by releasing the latch plate 5f. Is pushed down and overlapped with the contact holder 4d of the auxiliary contact mechanism 4. As a result, the stationary contact 5a and the movable contact 5b are closed, and the alarm contact mechanism 5 outputs as an electrical signal that the circuit breaker 2 has tripped. Simultaneously with the above operation, the alarm display section 6d of the alarm operation lever 6 moves below the alarm display window 3a as shown in FIG. 7 (b) to display the trip operation state of the circuit breaker 2.
[0009]
When the handle is reset after the trip operation of the circuit breaker 2, the contact holder 4d of the auxiliary contact mechanism 4 is moved from the position shown in FIG. 7 (a) via the opening / closing shaft 2a and the drive lever 4e. While sliding and moving upward, the contact holder 5d of the alarm contact mechanism 5 is lifted by the contact holder 4d, and the movable contact 5b is separated from the fixed contact 5a. At the same time, the latch plate 5f is also moved upward, whereby the alarm operating lever 6 is returned to the position shown in FIG. 6 (b) by the spring force of the return spring 6c, and the latch plate 5f is again engaged and held at the reset position.
[0010]
In the attached switch unit 1 described above, a set of auxiliary contact mechanism 4 and alarm contact mechanism 5 are built in the unit case 3. On the other hand, as shown in FIGS. 8 (a) and 8 (b), an accessory switch unit product having an auxiliary contact mechanism 4 having two sets of auxiliary contacts in the unit case 3 is also known.
That is, in the attached switch unit 1 shown in FIG. 8, the contact holder 5d, the latch plate 5f and the alarm operation lever, which are related parts of the alarm contact mechanism 5, are changed from the attached switch unit having the above-described configuration shown in FIGS. After removing the parts such as 6, the auxiliary contact mechanism 4 has two sets of auxiliary contacts (fixed contact 4a and movable contact 4b) (the upper auxiliary contact is b contact and the lower auxiliary contact is a contact), each set of movable contacts 4b is held by a common contact holder 4d, and the contact holder 4d is connected to a drive lever 4e coupled to the open / close shaft 2a of the circuit breaker. become.
[0011]
In such a configuration, when the circuit breaker is turned on, the attached switch unit 1 is driven by the opening / closing shaft 2a that rotates counterclockwise as shown in FIG. Of the auxiliary contacts, the lower auxiliary contact (a contact) is closed, and the upper auxiliary contact (b contact) is opened. When the circuit breaker is turned off, the lower auxiliary contact (a contact) is opened and the upper auxiliary contact (b contact) is closed as shown in FIG. Thus, two types of electrical signals corresponding to the ON and OFF states of the circuit breaker can be displayed with a single attached switch unit.
[0012]
[Problems to be solved by the invention]
By the way, the user who obtained the circuit breaker purchased the attached switch unit (see FIGS. 6 and 7) that includes the auxiliary contact mechanism 4 and the alarm contact mechanism 5 as the accessory device. When the alarm contact becomes unnecessary and two sets of auxiliary contacts are needed instead, the user needs to purchase a new accessory switch unit shown in Fig. 8 and replace it with the existing accessory switch unit. For this reason, the user is burdened with a new expense.
[0013]
Therefore, the object of the present invention is to change only a part of the parts of the alarm contact mechanism without requiring the addition or modification of new parts for the attached switch unit incorporating the auxiliary contact mechanism and the alarm contact mechanism. It is an object of the present invention to provide a highly versatile circuit breaker attached switch unit which is improved so that an alarm contact mechanism can be used as an auxiliary contact mechanism.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, there is provided an attached switch unit of a circuit breaker that outputs on / off and trip states of the circuit breaker as electrical signals. A built-in auxiliary contact mechanism that opens and closes contacts in conjunction with on / off operations and an alarm contact mechanism that closes contacts in response to tripping of the circuit breaker, and the auxiliary contact mechanism is a drive lever. Is connected to the open / close shaft of the circuit breaker body via the alarm contact mechanism is connected to the alarm operation lever driven by the alarm output plate of the circuit breaker body via the latch,
The alarm operation lever is provided with a setting means for moving the alarm operation lever to a connection position with a latch provided in the alarm contact mechanism and to a non-connection position separated from the latch, and the alarm operation lever is moved from the connection position to the non-connection position. The contact of the alarm contact mechanism is made to function as a second auxiliary contact that is linked to the auxiliary contact mechanism.
[0015]
In the above configuration, if the alarm operation lever linked to the alarm contact mechanism is set to the linked position, the circuit breaker is turned on and off by the auxiliary contact mechanism built in the attached switch unit, and the circuit by the alarm contact mechanism. The tripping operation of the circuit breaker can be displayed as an electrical signal. On the other hand, when the alarm operation lever is switched from the linked position to the non-linked position, the alarm contact mechanism functions as an auxiliary contact mechanism. In other words, without adding new parts or changing the structure, the specifications of the attached switch unit can be changed from a combination of auxiliary contact and alarm contact to a combination of two sets of auxiliary contacts as required. Moreover, it becomes possible to return to the original combination.
[0016]
Further, in the attached switch unit having the above-described configuration, the setting means for switching the alarm operation lever to the linked position or the non-linked position can be specifically handled in the following manner.
(1) The alarm operation lever is supported so as to be slidable in the axial direction between the linked position and the non-linked position via the support shaft, and the lever is locked and held at the non-linked position. (Claim 2).
[0017]
(2) The alarm operation lever is supported so as to be rotatable between the linked position and the non-linked position via the support shaft, and the lever is locked and held at the non-linked position. (Claim 3).
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the examples shown in FIGS. In the drawings of the embodiments, members corresponding to those in FIGS. 6 and 7 are denoted by the same reference numerals, and detailed description thereof is omitted.
First, the attached switch unit shown in FIG. 1 (a) is basically the same as the conventional structure shown in FIG. 6, and an auxiliary contact mechanism 4 and an alarm contact mechanism 5 are built in the unit case 3 to provide an alarm. The latch plate 5f of the contact mechanism 5 is connected to the alarm output plate 2b of the circuit breaker 2 shown in FIG.
[0019]
In the illustrated embodiment, as shown in FIGS. 1B and 1C, the alarm operation lever 6 is linked to the latch plate 5f of the alarm contact mechanism so that the lever 6a overlaps the tip of the latch plate 5f. The position A and the non-linked position B moved laterally from the tip of the latch plate 5f are set and held at each position. For this purpose, a support shaft 6b formed integrally with the lever (resin molded product) 6a is supported so as to be slidable in the axial direction across the left and right bearings 6e, and on the right side of the support shaft 6b. An engagement protrusion 6b-1 is provided on the peripheral surface, and the engagement protrusion 6b-1 is press-fitted into the inner peripheral surface of the bearing 6e in a state where the lever 6a is slid to the non-linked position B (see FIG. 1 (c)). Thus, the lever 6a is locked and held at this position.
[0020]
In order to display the trip operation of the circuit breaker using the alarm contact mechanism 5, the alarm operation lever 6 is set to the connection position A in FIG. 1 (b). As a result, the alarm operation lever 6 and the latch plate 5f are connected in the same manner as in FIGS. 6 (a) and 6 (b). When the circuit breaker trips from this state, the latch plate 5f is released following the movement of the alarm output plate 2b as described in FIGS. 7 (a) and 7 (b). As described above, the contact holder 5d of the alarm contact mechanism 5 moves downward so that the movable contact 5b contacts the fixed contact 5a and outputs an electrical signal to the outside.
[0021]
On the other hand, when the alarm operation lever 6 is slid to the left and set to the non-connected position B in FIG. 1 (c), the lever 6a is released from the latch plate 5f to the side, releasing the latch plate 5f. Thus, if the circuit breaker is OFF, the contact holder 5d of the alarm contact mechanism 5 is lowered by the spring bias of the drive spring 5e, and the contact holder 4d of the auxiliary contact mechanism 4 is lowered as shown in FIG. At the same time, the movable contact 5b is held in contact with the fixed contact 5b.
[0022]
When the circuit breaker is turned on from here, the contact holder 4d of the auxiliary contact mechanism 4 rises via the opening / closing shaft 2a and the drive lever 4e, and the movable contact 4b contacts the fixed contact 4a at the same time. The contact holder 5d of the alarm contact mechanism 5 is pushed upward together with the contact holder 4d of the auxiliary contact mechanism 4, and the movable contact 5b is separated from the fixed contact 5a. Even if the circuit breaker trips in this state, the alarm operation lever 6 is moved to the non-connected position B, so that the movement of the alarm output plate 2b is transmitted to the latch plate 5f via the alarm operation lever 6. It will never be done.
[0023]
Therefore, by setting the alarm operation lever 6 to the non-linked position B, the contact of the alarm contact mechanism 5 functions as a second auxiliary contact (b contact) that opens and closes in conjunction with the auxiliary contact mechanism 4. Thereby, the attached switch unit 1 can be used by changing to the auxiliary switch incorporating the two sets of auxiliary contacts described in FIG. If the alarm operation lever 6 is returned from the non-connection position B to the connection position A, the contact of the alarm contact mechanism 5 again functions as an alarm contact.
[0024]
Next, applied examples of means for locking and holding the alarm operation lever 6 at the non-linked position B are shown in FIGS. That is, in the embodiment shown in FIGS. 1 (b) and 1 (c), the engaging projection 6b-1 is provided on the support shaft 6b of the lever 6a so that the lever is locked and held at the non-linked position B. In the applied embodiment of FIG. 4, the lever end of the alarm operation lever 6 is connected to the square hole 3 b opened in the side surface of the unit case 3 so as to protrude to the circuit breaker 2 and to the side (non-connected position side) of the lever. After engaging groove 3b-1 is cut out, an engaging projection 3b-2 is formed on the inner edge of the groove, and the alarm lever 6 is slid from the linked position to the non-linked position B, and the tip of lever 6a is The groove 3b-1 is press-fitted and held at this position.
[0025]
5 (a) and 5 (b), unlike the above-described embodiments, the unconnected position B of the alarm operation lever 6 is maximized as shown in FIG. 5 (a). Even if the circuit breaker trips, the alarm output plate 2b does not move even if it is moved forward (this position is out of the movement path of the alarm output plate 2b of the circuit breaker (see Fig. 6 (b)). In this position, the engagement protrusions 6a-1 formed on the left and right edges of the lever 6a are press-fitted into the square holes 3b opened in the unit case 3 and held there. In this non-linked position B, the alarm operation lever 6 is released forward from the latch plate 5f to release the restraint. As a result, the contact of the alarm contact mechanism functions as an auxiliary contact as in the previous embodiment. Alternatively, an engagement protrusion may be formed on the side of the square hole 3b so that the lever 6a is press-fitted and held.
[0026]
【The invention's effect】
As described above, according to the present invention, in the unit case, the auxiliary contact mechanism that opens and closes the contact in conjunction with the on / off operation of the circuit breaker, and the trip operation of the circuit breaker. Built-in alarm contact mechanism that closes the contact, and the auxiliary contact mechanism is connected to the open / close shaft of the breaker body via the drive lever, and the alarm contact mechanism is connected to the alarm output plate of the breaker body via the latch. In an attached switch unit of a circuit breaker that is configured to be linked to a driven alarm operation lever, the alarm operation lever is moved to a connection position with a latch provided in the alarm contact mechanism and to a non-connection position separated from the latch. Provided with setting means, moving the alarm operation lever from the linked position to the unlinked position and disconnecting it from the latch, the contact of the alarm contact mechanism is linked with the auxiliary contact mechanism By that it was to function as a second auxiliary contact, the effect of the next follow.
[0027]
That is, in the above configuration, if the alarm operation lever linked to the alarm contact mechanism is set to the linkage position, the circuit breaker is turned on and off by the auxiliary contact mechanism built in the attached switch unit, and the alarm contact mechanism. The tripping action of the circuit breaker can be displayed as an electrical signal. On the other hand, when the alarm operation lever is switched from the linked position to the non-linked position, the alarm contact mechanism functions as an auxiliary contact mechanism. In other words, without changing the position of the alarm operation lever without adding new parts or changing the structure, the specification of the attached switch unit can be changed from the combination of auxiliary contact and alarm contact as required. It becomes possible to change to a combination of two sets of auxiliary contacts or return to the original combination. As a result, manufacturers can reduce costs by reducing the number of affiliated switch unit models, and improve serviceability for users.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an attached switch unit according to an embodiment of the present invention, in which (a) is an internal structure diagram of the entire unit representing an operation when a circuit breaker is OFF with an alarm operation lever set at a linked position; (b) and (c) are enlarged front views with the alarm operation lever in (a) set to the linked position and the non-linked position, respectively. [Fig. 2] The alarm switch lever is linked to the attached switch unit of Fig. 1. Fig. 3 shows the operation when the circuit breaker trips with the circuit breaker set to [Fig. 3]. Fig. 3 shows the operation when the circuit breaker is OFF with the alarm operation lever set to the unconnected position in the attached switch unit of Fig. 1. FIG. 4 is a block diagram of an application example different from FIG. 1 regarding the means for locking and holding the alarm operation lever in the non-linked position. FIG. The figure FIG. 6 is a side view and a front view, respectively. FIG. 6 is a block diagram of a conventional accessory switch unit incorporating an auxiliary contact mechanism and an alarm setting mechanism. (A) is an internal structural diagram of the entire unit showing the circuit breaker when it is OFF, and (b) is a cross-sectional side view showing the connection structure of the alarm operation lever and circuit breaker alarm output plate in (a). FIG. 7 is a diagram showing the operation when the circuit breaker trips in FIG. 6, and (a) and (b) are trip operation state diagrams corresponding to FIGS. 6 (a) and (b), respectively. 8) Configuration diagram of a conventional accessory switch unit with built-in auxiliary contact mechanism with two sets of contacts, (a) and (b) are diagrams showing the operating state when the circuit breaker is ON and OFF, respectively. Explanation】
1 Attached switch unit 2 Circuit breaker 2a Opening / closing axis 2b Alarm output plate 3 Unit case 3b Square hole 3b-1 Lever pulling groove 3b-2 Engaging protrusion 4 Attached contact mechanism 4a Fixed contact 4b Movable contact 4d Contact holder 4e Drive lever 5 Alarm contact mechanism 5a Fixed contact 5b Movable contact 5d Contact holder 5e Drive spring 5f Latch plate 6 Alarm operation lever 6a Lever 6a-1 Engagement protrusion 6b Support shaft 6b-1 Engagement protrusion 6c Return spring 6d Bearing

Claims (3)

回路しゃ断器のオン,オフおよびトリップ状態を電気信号として出力する回路しゃ断器の付属スイッチユニットであり、そのユニットケース内に、回路しゃ断器のオン,オフ操作に連動して接点を開,閉する補助接点機構、および回路しゃ断器のトリップ動作に連動して接点を閉じる警報接点機構とを連繋して内蔵し、かつ補助接点機構は駆動レバーを介してしゃ断器本体の開閉軸に連繋し、警報接点機構はラッチを介してしゃ断器本体の警報出力板に従動する警報動作レバーに連繋させた構成になるものにおいて、
前記警報動作レバーを警報接点機構に設けたラッチとの連繋位置,および該ラッチから切り離した非連繋位置に移動する設定手段を備え、警報動作レバーを連繋位置から非連繋位置に移動して前記ラッチと切り離すことにより、警報接点機構の接点を前記の補助接点機構と連動する第2の補助接点として機能させるようにしたことを特徴とする回路しゃ断器の付属スイッチユニット。
A switch unit attached to the circuit breaker that outputs the circuit breaker on / off and trip status as electrical signals. The unit case opens and closes in conjunction with the circuit breaker on / off operation. An auxiliary contact mechanism and an alarm contact mechanism that closes the contact in conjunction with the trip operation of the circuit breaker are linked and built in, and the auxiliary contact mechanism is linked to the open / close shaft of the circuit breaker body via a drive lever to alarm. The contact mechanism is configured to be linked to an alarm operation lever that is driven by an alarm output plate of the circuit breaker body via a latch.
The alarm operation lever is provided with a setting means for moving the alarm operation lever to a connection position with a latch provided in the alarm contact mechanism and to a non-connection position separated from the latch, and the alarm operation lever is moved from the connection position to the non-connection position. The switch unit for the circuit breaker is characterized in that the contact of the alarm contact mechanism is made to function as a second auxiliary contact interlocking with the auxiliary contact mechanism by disconnecting from the alarm contact mechanism.
請求項1記載の付属スイッチユニットにおいて、警報動作レバーの設定手段として、警報動作レバーをその支軸を介して連繋位置と非連繋位置との間で軸方向へスライド移動可能に支持した上で、該レバーを非連繋位置に係止して拘束保持するようにしたことを特徴とする回路しゃ断器の付属スイッチユニット。In the attached switch unit according to claim 1, as the setting means of the alarm operation lever, the alarm operation lever is supported so as to be slidable in the axial direction between the linked position and the non-linked position via the support shaft. An attached switch unit for a circuit breaker, wherein the lever is locked and held at a non-connected position. 請求項1記載の付属スイッチユニットにおいて、警報動作レバーの設定手段として、警報動作レバーをその支軸を介して連繋位置と非連繋位置との間で回動移動可能に支持した上で、該レバーを非連繋位置に係止して拘束保持するようにしたことを特徴とする回路しゃ断器の付属スイッチユニット。2. The accessory switch unit according to claim 1, wherein the alarm operating lever is supported by the alarm operating lever so as to be rotatable between a linked position and a non-linked position via its support shaft. The switch unit attached to the circuit breaker is characterized in that it is locked and held at a non-connected position.
JP2002152662A 2002-05-27 2002-05-27 Switch unit attached to circuit breaker Expired - Fee Related JP3952855B2 (en)

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KR100555364B1 (en) 2004-08-27 2006-02-24 엘에스산전 주식회사 Operating device for front and side mounting accessory

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