JPH0668777A - Earth leakage breaker - Google Patents

Earth leakage breaker

Info

Publication number
JPH0668777A
JPH0668777A JP14457193A JP14457193A JPH0668777A JP H0668777 A JPH0668777 A JP H0668777A JP 14457193 A JP14457193 A JP 14457193A JP 14457193 A JP14457193 A JP 14457193A JP H0668777 A JPH0668777 A JP H0668777A
Authority
JP
Japan
Prior art keywords
earth leakage
zero
current transformer
phase current
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14457193A
Other languages
Japanese (ja)
Other versions
JP2595184B2 (en
Inventor
Hiroshi Matsuda
宏 松田
Terumi Shimano
輝美 嶋野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Techno Engineering Co Ltd
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Techno Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Techno Engineering Co Ltd
Priority to JP5144571A priority Critical patent/JP2595184B2/en
Publication of JPH0668777A publication Critical patent/JPH0668777A/en
Application granted granted Critical
Publication of JP2595184B2 publication Critical patent/JP2595184B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Breakers (AREA)

Abstract

PURPOSE:To realize downsizing, improve workability in installing parts in a case, and improve reliability in insulation. CONSTITUTION:In an earth leakage breaker housing a zero-phase converter 13, an overcurrent detecting part and an overcurrent tripping device in a cage body, the earth leakage breaker is characterized in that an installing member is proveded so that the overcurrent detecting part and the overcurrent tripping device can be installed, and the installing member is installed above the zero- phase converter 13 in the cage body so as to be mountable and demountable freely, and an insulating wall is provided between poles of the installing member. Thereby, the downsized earth leakage breaker having excellent workability in installing parts in a case and insulating performance between the poles, can be obtained.

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、零相変流器、可動接点
台、導電線、漏電検出部、過電流リレー部を有する漏電
遮断器に係り、特に零相変流器と過電流リレー部の組立
作業性と絶縁信頼性の向上に好適な漏電遮断器に関す
る。 【0002】 【従来の技術】従来の漏電遮断器は特開昭60−230
333号公報に開示されているように、漏電遮断器の外
形寸法が比較的大きく余裕があるため、零相変流器を過
電流検出装置と負荷側端子との間に配置していた。 【0003】 【発明が解決しようとする課題】上記従来技術は、過電
流検出装置と負荷側端子との間に零相変流器を設置する
ためのスペースを必要とし、漏電遮断器の電源側端子か
ら負荷側端子に至る寸法が大きくなり、漏電遮断器を小
型化して協約形寸法に仕上げることが非常に困難であっ
た。 【0004】また、本発明に至る過程で漏電遮断器の小
型化を図るために図12〜図16に示すように、オイル
ダッシュポットリレーの下部に零相変流器を納めること
が検討された。すなわち、図13に示すように底面にケ
ース穴部1a’を有する漏電遮断器ケース1’に図12
に示すような負荷側端子15’、ダッシュポットリレー
部14、貫通線11’、零相変流器13、可動絶縁軸体
7’可動接点台8’の組み立て品を装着することが検討
された。漏電遮断器ケース1’のダッシュポットリレー
部14の取り付け部分はケース底面を上げ底にした形で
他の部分と一体に形成され、この取り付け部分の上側に
はダッシュポットリレー部14が装着され、下側には零
相変流器13と漏電検出部27’が装着される。図14
〜図16はこの漏電遮断器の組立段階を示し、ダッシュ
ポットリレー部14を装着後、各極の貫通線11’が貫
通する零相変流器13と漏電検出部27’をケース穴部
1a’へ挿入してダッシュポットリレー下側の所定位置
に固定する過程を順に示している。 【0005】この案では、漏電遮断器のケース上面側か
ら零相変流器、漏電検出回路用プリント基板を含む漏電
検出手段、過電流検出手段であるダッシュポットリレー
部を組付けるに際して、零相変流器13および漏電検出
部27’の装着の作業性が悪いとともに零相変流器13
を貫通する導線の絶縁チューブの損傷を招くなど絶縁信
頼性の点で問題がある。 【0006】本発明の目的は上記問題点に鑑み、小型化
を図れるとともにケース内への部品装着の作業性の向上
および、絶縁信頼性の向上を図れる漏電遮断器を提供す
ることにある。 【0007】 【課題を解決するための手段】上記の目的は、零相変流
器と、この零相変流器に接続された検出回路と、この検
出回路の出力により駆動される漏電引外装置と、固定接
触子と、消弧装置と、可動接触子と、開閉機構と、これ
らを収納する筐体と、過電流検出部と過電流引き外し装
置と、これらが取り付けられた取り付け部材を備え、取
り付け部材を零相変流器の上方で筐体に着脱自在に装着
し、取り付け部材の極間に絶縁壁を設けることによって
達成される。 【0008】 【作用】零相変流器は電路の電流の不平衡により出力を
発生し、検出回路は零相変流器の出力から漏電を検出し
て引き外しのための出力を発生する。漏電引外装置は検
出回路の出力により駆動されて引き外し機構をトリップ
させる。可動接触子は開閉機構により固定接触子と開閉
動作を行なう。消弧装置は開閉の際のアークを消滅させ
る。過電流検出部は過電流を検出して過電流引き外し装
置を動作させ、引き外し機構をトリップさせる。取り付
け部材には過電流検出部および過電流引き外し装置が取
り付けられる。筐体は上記の構成要素を収納する。零相
変流器を筐体の底部と取り付け部材の間に配置され、取
り付け部材は筐体に着脱自在に装着される。取り付け部
材の極間に設けられた絶縁壁は過電流引き外し装置間を
絶縁する。これにより、漏電遮断器のケース内への上記
各部品をケース上面側から落し込んで挿入することによ
り収納できる。また、電源側端子から負荷側端子に至る
寸法を低減でき、極間の絶縁性を向上させることができ
る。 【0009】 【実施例】以下本発明の実施例を図1〜図11および図
17、図18により説明する。 【0010】本発明の第1実施例を図1〜図11を用い
て説明する。本実施例は3相用の漏電遮断器であり、図
1は本発明の第1実施例における漏電遮断器の側断面
図、図2は同平面図、図3は本実施例の要部組立斜視
図、図4は本実施例の可動接点台の組立斜視図、図5は
本実施例のオイルダッシュポットリレー部斜視図、図6
は本実施例の極間絶縁台の斜視図、図7は本実施例のオ
イルダッシュポットリレー部と極間絶縁台組立斜視図、
図8は本実施例の漏電遮断器ケースの平面図、図9は本
実施例におけるオイルダッシュポットリレー部のケース
への組込み作業図である。 【0011】本実施例の漏電遮断器は図1に示されるよ
うにケース1に格納された電源側端子に接続されて固定
接点23を有する固定接点台16、可動接点22を有し
固定接点台16と対向して配置された可動接点台8、可
動接点台8を保持する可動絶縁軸体7と操作ハンドル4
の動作を可動絶縁軸体7に伝達するレバー5を有する可
動接点台4の開閉機構、漏電電流を検出する零相変流器
13、零相変流器13の出力から漏電を検出して引き外
しのための出力を発生する漏電検出部27、漏電検出部
27に接続されその電気的出力により動作して引き外し
のための機械的出力を発生する引き外し装置19、過電
流を検出して引き外しのための機械的出力を発生するオ
イルダッシュポットリレー部(以下リレー部と略称す
る)14、漏電電流または過電流が流れたとき引き外し
装置19またはリレー部14の出力によりトリップ動作
をして開閉機構を引き外す引き外し機構30、負荷側端
子台15を有し、さらにケース1はその底面が裏蓋3で
覆われ、上面(操作ハンドル4のある側)がモールドカ
バー2で覆われている。 【0012】リレー部14は図1に示されるように過電
流を検出する検出部としてのコイル部分14bと、過電
流時にこのコイル部分に流れる電流によりコイルが励磁
されると吸引される可動コア14cの動作を機械的出力
として発生する過電流引き外し装置としてのオイルダッ
シュポットリレーを有し、この出力は可動コアの一部を
介して引き外し機構30に伝達される。 【0013】ケース1には図1、図3、図8および図9
に示すように、零相変流器13、リレー部14、漏電検
出部27が装着される部分の底面に開口する穴1aが形
成されている。この穴1aは各部品が装着された後下面
から取付けられた裏蓋3により覆われる。また、ケース
1、モールドカバー2および裏蓋3は筐体を形成してい
る。 【0014】本実施例では図3、図7、図9に示される
ようにリレー部14はその負荷側は負荷側端子15に接
続されるとともに、その電源側は零相変流器13を貫通
する接続線11により可動接点台8に接続された状態で
リレー部組み立て品としてあらかじめ組み立てられ、ケ
ース1に対して着脱自在に構成された取り付け部材とし
ての極間絶縁台20の上側に装着される。さらに本実施
例では可動接点台8はピン9により可動絶縁軸体7に回
動自在に軸支される。 【0015】本実施例では可動接点台8と、この可動接
点台8の回動を支持するピン9を一体構造にして可動絶
縁軸体7に組み込むので、強度と耐磨耗性が向上して接
点圧の高い高定格電流フレームにも適用が可能となる。 【0016】リレー部組み立て品は可動絶縁軸体7が装
着され、零相変流器13の上方にリレー部14が位置す
る状態でケース1に装着される。ケース1には零相変流
器13の上方となる位置に極間絶縁台20が着脱自在に
装着される。これによりリレー部組み立て品の装着後は
極間絶縁台20の上側に過電流検出部と過電流検出装置
を配置し、零相変流器13をケース1の底部と極間絶縁
台20の間に配置した構成となる。 【0017】また、極間絶縁台20は図6、図7に示さ
れるように各相のリレー部14間を仕切る隔壁部分20
bを有し、この隔壁部分20bは極間の絶縁壁として機
能する。 【0018】可動絶縁軸体7の中央極部分には操作ハン
ドル4の動作を可動絶縁軸体7に伝達するレバー5を有
する可動接点台4の開閉機構が接続され、この開閉機構
には漏電電流または過電流が流れたとき引き外し装置1
9またはリレー部14の出力によりトリップ動作をして
開閉機構を引き外す引き外し機構30が接続される。引
き外し装置19は、中央極の隣の極に設けられ、引き外
し機構30に係合して漏電検出部27の出力により動作
して引き外し機構30をトリップさせる。 【0019】本実施例では上記構成により漏電遮断器の
底面積(据え付け面積)を従来のものに比べ小さくする
ことができる。 【0020】また、過電流検出部が零相変流器の上側に
あるので、過電流検出部の発熱が零相変流器に伝わるの
が防止でき、零相変流器13を貫通する接続線11の絶
縁被覆の熱による劣化を防止できる。 【0021】本実施例の漏電遮断器のON−OFFはモ
ールドカバー2の表面から突出した操作ハンドル4を図
1の矢印A−B方向へ回動操作することによってなされ
る。ON操作はハンドル4を矢印A方向に回動させる
と、2節リンクを構成するレバー5を経てローラ6がモ
ールドケース1の下方に向かって可動絶縁軸体7を押圧
し、これにより可動絶縁軸体に支持された複数の可動接
点台8の可動接点22がモールドケース1に配設された
固定接点台16の固定接点23と接触し電源ONの状態
となる。 【0022】可動絶縁軸体7は圧縮ばね26により図1
中でその上側に向かう方向に付勢されており、また可動
接点台8の一端に係着されるCNばね10により、ON
時には可動接点台8をピン9を中心として反時計方向に
回動付勢されて接点圧が付与されている。この接点圧の
反力はピン9を経て可動絶縁軸体7に図示上方への負荷
として作用するように構成される。 【0023】極間絶縁台20の一部には可動接点台8の
動作の範囲を規制するストッパ部20aが形成され、こ
のストッパ部20aは可動接点22と固定接点23間が
開極するとき、可動接点台8の可動接点22の反対側端
の上限を規制する機能を有する。 【0024】可動接点台8に連結された接続線11は3
相分の接続線全てが零相変流器13を貫通して負荷側端
子15に接続されている。 【0025】負荷側端子15に漏電電流が流れた場合
は、各相の電流のバランスが崩れて零相変流器13に出
力が発生し、この零相変流器13の出力により漏電を検
知してプリント基板上に構成された電子回路を有する漏
電検出部27(図9)で増幅し、引き外し装置19(図
2)を動作させて引き外し機構30をトリップ動作さ
せ、レバー5の2節リンクを折りまげて漏電遮断器を開
極状態に至らせる。 【0026】一方、負荷側端子15に過電流が流れた場
合は、リレー部14を動作させ、引き外し機構30をト
リップ動作させ、レバー5の2節リンクを折りまげて漏
電遮断器を開極状態に至らせる。 【0027】上記の各部品の組付け手順について図3〜
図9を用いて説明する。負荷側端子15、絶縁チューブ
で覆われた接続線11、可動接点台8、リレー部14、
零相変流器13、漏電検出部27と連なるリレー組立品
と可動絶縁軸体7を図5に示すように予め組み立ててお
く。 【0028】この組み立て品をモールドケース1内に装
着するにあたり、まず図7に示されるようにリレー部1
4を図6の極間絶縁台20上に装着し、次いで図3、図
9に示すようにケース1の上部側から可動接点台8を組
付けた可動絶縁軸体7を挿入し、同時に3相分の接続線
11、零相変流器13、漏電検出部27も挿入する。ケ
ース1には図8に示すように、前記の各部品装着対応部
に穴1aが大きく開口されているから、部品の装着組付
作業は極めて容易である。 【0029】次いでリレー部14が装着された極間絶縁
台20を零相変流器13の上部に載置してケース1内に
固定する。さらに、ハンドル4を含む開閉機構部、引き
外し装置19を順次装着し、モールドカバー2で上面を
覆い、裏蓋3を下面から取付けて全組立を終了する。 【0030】本実施例では極間絶縁台20にリレー部1
4を予め装着してケース1に固定したが、これに限るこ
とはなく、極間絶縁台20を零相変流器13の上部に固
定した後にリレー部14を極間絶縁台20上に装着して
もよい。 【0031】リレー部14のコイルと負荷側端子15と
の接続部は図10に示すように、接続部24aに幅広の
編織導電体24を使用すると、リレー部14の多少の移
動や、コイルと負荷側端子15間の位置ずれ誤差を吸収
して組立作業性を向上するのに好適である。 【0032】図11(a)、(b)は固定接点台16の
一端にアークホーン25を固定する手順を示す。まず同
図(a)のように固定接点台16の切欠き溝16aにア
ークホーン25を嵌装する。次いで、アークホーン25
の足部25aを折り曲げ、塑性変形加工により固定接点
台16に密着させて同図(b)のように固定した後、固
定接点23と共に固定接点台16にロー付けする。 【0033】これにより、アークホーン25は塑性変形
加工による密着とロー付けによる2重の固定手段により
固定接点台16に強固に固定され、衝撃力や振動による
緩みの発生が防止できて部品点数を増加することなしに
固定信頼性を高めることができるとともに固定接点23
との間の電気抵抗が減少してアークを導きやすくなる。 【0034】本発明の第2実施例を図17、図18によ
り説明する。本実施例は図17に示すように、リレー部
14の各極間を仕切ると共にヨーク14aの両端及び零
相変流器13を絶縁して収容する絶縁箱体28と、可動
接点台8を組み込んだ可動絶縁軸体7を設け、これらの
組立品を図18に示す漏電遮断器ケース1”に装着した
ものである。図18の穴部1”aは絶縁箱体28が挿入
される穴である。本実施例はリレー部14関連部品の組
立が安定し作業性が一層向上する。他の部分の構成は第
1実施例と同じである。 【0035】以上の実施例によれば、可動接点台8、可
動接点台8に接続する導電性の接続線11、零相変流器
13、極間絶縁台20及び漏電検出部27を有するリレ
ー部組立品を、ケース上面側からケース内に落し込んで
挿入し、次いで極間絶縁台20をケース内に装着固定す
ればよく、漏電遮断器のケース内への上記各部品の収納
部分は極間絶縁台20がケースと着脱自在であるため、
空間が広くなって組立時に上記部品の挿入が容易とな
り、アークホーンの固定の簡易化、リレー部14のコイ
ルと負荷側端子15の接続の容易化とあいまって作業性
が向上する。 【0036】また、接続線11を被覆している絶縁チュ
ーブの損傷が防止され絶縁信頼性が向上する。 【0037】また、零相変流器をリレー部の下部に配置
することにより小型化を前提とした協約形寸法への対応
が容易にできる。 【0038】 【発明の効果】本発明によれば、小型化でケース内への
部品装着の作業性及び極間の絶縁性能に優れた漏電遮断
器を得ることができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage circuit breaker having a zero-phase current transformer, a movable contact stand, a conductive wire, an earth leakage detection portion, and an overcurrent relay portion, In particular, the present invention relates to an earth leakage breaker suitable for improving workability in assembling a zero-phase current transformer and an overcurrent relay section and insulation reliability. [0002] A conventional earth leakage breaker is disclosed in Japanese Patent Laid-Open No. 60-230.
As disclosed in Japanese Patent No. 333, since the external dimensions of the earth leakage circuit breaker are relatively large and there is a margin, the zero-phase current transformer is arranged between the overcurrent detection device and the load side terminal. The above-mentioned prior art requires a space for installing the zero-phase current transformer between the overcurrent detection device and the load side terminal, and the power source side of the earth leakage breaker. The size from the terminal to the load side terminal became large, and it was very difficult to downsize the earth leakage breaker and finish it to the agreement size. Further, in the process of reaching the present invention, in order to miniaturize the earth leakage breaker, as shown in FIGS. 12 to 16, it was considered to install a zero-phase current transformer under the oil dashpot relay. . That is, as shown in FIG. 13, the earth leakage circuit breaker case 1 ′ having the case hole portion 1a ′ on the bottom surface thereof is shown in FIG.
It was considered to mount the assembly of the load side terminal 15 ', the dashpot relay section 14, the penetrating wire 11', the zero-phase current transformer 13, the movable insulating shaft 7'movable contact base 8'as shown in FIG. . The portion to which the dashpot relay portion 14 of the earth leakage breaker case 1'is attached is integrally formed with other portions with the bottom surface of the case raised, and the dashpot relay portion 14 is attached to the upper side of this attachment portion. The zero-phase current transformer 13 and the earth leakage detector 27 'are mounted on the side. 14
16 shows the stage of assembling this earth leakage circuit breaker. After the dashpot relay portion 14 is mounted, the zero phase current transformer 13 through which the through wire 11 'of each pole penetrates and the earth leakage detection portion 27' are connected to the case hole portion 1a. It is shown in order of the process of inserting into 'and fixing to a predetermined position under the dashpot relay. According to this plan, when the zero-phase current transformer, the earth leakage detecting means including the printed circuit board for the earth leakage detecting circuit, and the dashpot relay portion which is the overcurrent detecting means are assembled from the upper surface side of the earth leakage breaker, the zero phase The workability of mounting the current transformer 13 and the leakage detector 27 'is poor, and the zero-phase current transformer 13
There is a problem in terms of insulation reliability, such as damage to the insulating tube of the conductor wire that penetrates through. In view of the above problems, it is an object of the present invention to provide an earth leakage breaker which can be miniaturized, improve the workability of mounting parts in a case, and improve the insulation reliability. The above object is to provide a zero-phase current transformer, a detection circuit connected to the zero-phase current transformer, and an earth leakage external current driven by the output of the detection circuit. A device, a fixed contact, an arc extinguishing device, a movable contact, an opening / closing mechanism, a housing for housing them, an overcurrent detection unit, an overcurrent trip device, and a mounting member to which these are mounted. And a mounting member is detachably mounted on the housing above the zero-phase current transformer, and an insulating wall is provided between the poles of the mounting member. The zero-phase current transformer produces an output due to the imbalance of the electric current in the electric path, and the detection circuit detects an electric leakage from the output of the zero-phase current transformer and produces an output for tripping. The earth leakage trip device is driven by the output of the detection circuit to trip the trip mechanism. The movable contactor opens and closes with the fixed contactor by the opening and closing mechanism. The arc extinguishing device extinguishes the arc when opening and closing. The overcurrent detection unit detects the overcurrent, operates the overcurrent trip device, and trips the trip mechanism. An overcurrent detector and an overcurrent trip device are attached to the attachment member. The housing houses the above components. The zero-phase current transformer is arranged between the bottom of the housing and the mounting member, and the mounting member is removably mounted on the housing. An insulating wall provided between the poles of the mounting member insulates between the overcurrent trip devices. As a result, the above-mentioned components can be stored in the case of the earth leakage breaker by dropping them from the upper surface side of the case and inserting them. Further, the size from the power supply side terminal to the load side terminal can be reduced, and the insulation between the electrodes can be improved. Embodiments of the present invention will be described below with reference to FIGS. 1 to 11, 17 and 18. A first embodiment of the present invention will be described with reference to FIGS. This embodiment is a three-phase earth leakage circuit breaker, FIG. 1 is a side sectional view of the earth leakage circuit breaker in the first embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. FIG. 4 is a perspective view of the movable contact base of the present embodiment assembled, and FIG. 5 is a perspective view of the oil dashpot relay portion of the present embodiment.
Is a perspective view of the inter-electrode insulating base of this embodiment, and FIG. 7 is a perspective view of the oil dashpot relay portion and inter-electrode insulating base assembly of this embodiment,
FIG. 8 is a plan view of the earth leakage breaker case of the present embodiment, and FIG. 9 is a work diagram of assembling the oil dashpot relay portion in the case in the present embodiment. As shown in FIG. 1, the earth leakage breaker of the present embodiment is connected to a power supply side terminal housed in a case 1 and has a fixed contact point 16 having a fixed contact 23 and a fixed contact point having a movable contact 22. 16, a movable contact base 8 arranged so as to face the movable contact base 16, a movable insulating shaft 7 for holding the movable contact base 8, and an operation handle 4.
Of the movable contact base 4 having the lever 5 for transmitting the operation of the above to the movable insulating shaft 7, the zero-phase current transformer 13 for detecting the leakage current, and the leakage from the output of the zero-phase current transformer 13 Leakage detection unit 27 that generates an output for disconnection, trip device 19 that is connected to leakage detection unit 27 and that operates by its electrical output to generate a mechanical output for tripping, and detects an overcurrent An oil dashpot relay section (hereinafter abbreviated as a relay section) 14 that generates a mechanical output for tripping, trips by the output of the trip unit 19 or the relay section 14 when a leakage current or an overcurrent flows. Has a tripping mechanism 30 for pulling out the opening / closing mechanism and a load side terminal block 15, and further, the bottom surface of the case 1 is covered with the back cover 3 and the top surface (the side with the operation handle 4) is covered with the mold cover 2. The . As shown in FIG. 1, the relay portion 14 includes a coil portion 14b as a detection portion for detecting an overcurrent, and a movable core 14c which is attracted when the coil is excited by the current flowing through this coil portion at the time of overcurrent. Has an oil dashpot relay as an overcurrent trip device for generating the operation of as a mechanical output, and this output is transmitted to the trip mechanism 30 through a part of the movable core. The case 1 is shown in FIGS. 1, 3, 8, and 9.
As shown in, a hole 1a is formed on the bottom surface of the portion where the zero-phase current transformer 13, the relay unit 14, and the leakage detection unit 27 are mounted. The hole 1a is covered with a back cover 3 attached from the lower surface after the components are mounted. Further, the case 1, the mold cover 2 and the back cover 3 form a case. In this embodiment, as shown in FIGS. 3, 7 and 9, the relay section 14 has its load side connected to the load side terminal 15, and its power source side passes through the zero-phase current transformer 13. The relay unit assembly is preassembled in a state where it is connected to the movable contact point 8 by the connecting wire 11 and is mounted on the upper side of the inter-electrode insulating base 20 as a mounting member that is detachably attached to the case 1. . Further, in this embodiment, the movable contact base 8 is rotatably supported on the movable insulating shaft body 7 by the pin 9. In the present embodiment, since the movable contact base 8 and the pin 9 for supporting the rotation of the movable contact base 8 are integrated into the movable insulating shaft body 7, the strength and wear resistance are improved. It can be applied to high rated current frames with high contact pressure. The relay part assembly is mounted on the case 1 with the movable insulating shaft 7 mounted and the relay part 14 positioned above the zero-phase current transformer 13. An interelectrode insulating base 20 is detachably attached to the case 1 at a position above the zero-phase current transformer 13. As a result, after the relay unit assembly is mounted, the overcurrent detection unit and the overcurrent detection device are arranged on the upper side of the interelectrode insulating base 20, and the zero-phase current transformer 13 is placed between the bottom of the case 1 and the interelectrode insulating base 20. It will be arranged in. Further, as shown in FIGS. 6 and 7, the inter-electrode insulating base 20 has a partition wall portion 20 for partitioning between the relay portions 14 of each phase.
The partition wall portion 20b functions as an insulating wall between the electrodes. An opening / closing mechanism of a movable contact base 4 having a lever 5 for transmitting the operation of the operating handle 4 to the movable insulating shaft 7 is connected to the central pole portion of the movable insulating shaft 7, and the leakage current is connected to this opening / closing mechanism. Or tripping device 1 when overcurrent flows
A tripping mechanism 30 is connected to trip the output mechanism 9 or the relay unit 14 to trip the opening / closing mechanism. The trip device 19 is provided on a pole adjacent to the center pole, engages with the trip mechanism 30, operates by the output of the leakage detector 27, and trips the trip mechanism 30. According to the present embodiment, the bottom area (installation area) of the earth leakage breaker can be made smaller than that of the conventional one by the above configuration. Further, since the overcurrent detecting portion is above the zero-phase current transformer, it is possible to prevent the heat generation of the overcurrent detecting portion from being transmitted to the zero-phase current transformer, and to connect the zero-phase current transformer 13 through the connection. It is possible to prevent deterioration of the insulating coating of the wire 11 due to heat. The earth leakage breaker of this embodiment is turned on / off by rotating the operation handle 4 protruding from the surface of the mold cover 2 in the direction of arrow AB in FIG. In the ON operation, when the handle 4 is rotated in the direction of arrow A, the roller 6 presses the movable insulating shaft body 7 downwardly of the mold case 1 via the lever 5 forming a two-bar link, whereby the movable insulating shaft 7 is rotated. The movable contacts 22 of the plurality of movable contact bases 8 supported by the body come into contact with the fixed contacts 23 of the fixed contact base 16 arranged in the mold case 1 to turn on the power. The movable insulating shaft 7 is attached to the movable insulating shaft 7 by a compression spring 26 as shown in FIG.
It is turned on by a CN spring 10 that is biased in the direction toward the upper side of the inside and is attached to one end of the movable contact base 8.
At times, the movable contact base 8 is biased counterclockwise about the pin 9 to apply contact pressure. The reaction force of the contact pressure is configured to act on the movable insulating shaft body 7 via the pin 9 as a load upward in the drawing. A stopper portion 20a for restricting the operation range of the movable contact base 8 is formed on a part of the inter-electrode insulating base 20, and when the movable contact 22 and the fixed contact 23 are opened, the stopper portion 20a is formed. The movable contact base 8 has a function of restricting the upper limit of the opposite end of the movable contact 22. The connecting wire 11 connected to the movable contact point 8 is 3
All the connecting wires for the phases pass through the zero-phase current transformer 13 and are connected to the load side terminal 15. When a leakage current flows through the load side terminal 15, the current balance of each phase is lost and an output is generated in the zero-phase current transformer 13, and the leakage is detected by the output of the zero-phase current transformer 13. Then, the leakage detection unit 27 (FIG. 9) having an electronic circuit formed on the printed circuit board amplifies the signal, and the tripping device 19 (FIG. 2) is operated to trip the tripping mechanism 30 to trip the lever 5 Fold the node links to open the earth leakage breaker. On the other hand, when an overcurrent flows through the load side terminal 15, the relay section 14 is operated, the tripping mechanism 30 is tripped, and the two-node link of the lever 5 is folded to open the earth leakage breaker. Reach the state. Assembling procedure of each of the above parts is shown in FIG.
This will be described with reference to FIG. Load side terminal 15, connection wire 11 covered with an insulating tube, movable contact base 8, relay section 14,
The relay assembly connected to the zero-phase current transformer 13 and the leakage detection unit 27 and the movable insulating shaft 7 are assembled in advance as shown in FIG. When mounting this assembly in the molded case 1, first, as shown in FIG.
4 is mounted on the interelectrode insulating base 20 of FIG. 6, and then the movable insulating shaft body 7 with the movable contact base 8 assembled therein is inserted from the upper side of the case 1 as shown in FIGS. The connection line 11, the zero-phase current transformer 13, and the leakage detector 27 for the phase are also inserted. As shown in FIG. 8, the case 1 has a large hole 1a formed in each of the component mounting corresponding portions, so that the component mounting work is extremely easy. Next, the interelectrode insulating base 20 having the relay portion 14 mounted thereon is placed on the upper part of the zero-phase current transformer 13 and fixed in the case 1. Further, the opening / closing mechanism including the handle 4 and the tripping device 19 are sequentially mounted, the upper surface is covered with the mold cover 2, and the back cover 3 is attached from the lower surface to complete the whole assembly. In this embodiment, the relay unit 1 is attached to the inter-electrode insulating base 20.
4 is mounted in advance and fixed to the case 1, but the present invention is not limited to this, and the relay part 14 is mounted on the interelectrode insulating base 20 after the interelectrode insulating base 20 is fixed to the upper part of the zero-phase current transformer 13. You may. As shown in FIG. 10, when a wide knitted woven conductor 24 is used for the connection portion 24a of the connection portion between the coil of the relay portion 14 and the load side terminal 15, the relay portion 14 is slightly moved or the coil is not connected to the coil. This is suitable for absorbing the positional deviation error between the load side terminals 15 and improving the assembly workability. FIGS. 11A and 11B show a procedure for fixing the arc horn 25 to one end of the fixed contact base 16. First, the arc horn 25 is fitted in the notch groove 16a of the fixed contact base 16 as shown in FIG. Then, the arc horn 25
The legs 25a are bent and adhered to the fixed contact base 16 by plastic deformation to fix the fixed contact base 16 as shown in FIG. As a result, the arc horn 25 is firmly fixed to the fixed contact base 16 by the double fixing means such as adhesion by plastic deformation processing and brazing, and the occurrence of loosening due to impact force or vibration can be prevented and the number of parts can be reduced. The fixed reliability can be improved without increasing the fixed reliability.
The electric resistance between and decreases and it becomes easy to guide the arc. A second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIG. 17, the movable box 8 and the insulating box 28 for partitioning the respective poles of the relay portion 14 and insulatingly accommodating both ends of the yoke 14a and the zero-phase current transformer 13 are incorporated. The movable insulating shaft 7 is provided, and these assemblies are attached to the earth leakage breaker case 1 "shown in FIG. 18. The hole 1" a in FIG. 18 is a hole into which the insulating box 28 is inserted. is there. In this embodiment, the assembly of the parts related to the relay portion 14 is stable and the workability is further improved. The configuration of the other parts is the same as that of the first embodiment. According to the above-mentioned embodiment, the relay having the movable contact point 8, the conductive connecting wire 11 connected to the movable contact point 8, the zero-phase current transformer 13, the inter-electrode insulating base 20, and the earth leakage detector 27. The subassembly may be dropped into the case from the upper surface side of the case, and then the interelectrode insulating base 20 may be mounted and fixed in the case. Since the insulation stand 20 is detachable from the case,
Since the space is widened, the above-mentioned components can be easily inserted at the time of assembly, the workability is improved together with the simplification of fixing the arc horn and the easy connection of the coil of the relay portion 14 and the load side terminal 15. Further, the insulation tube covering the connection wire 11 is prevented from being damaged, and the insulation reliability is improved. Further, by arranging the zero-phase current transformer in the lower part of the relay section, it is possible to easily deal with the agreement type dimension on the assumption of miniaturization. According to the present invention, it is possible to obtain an earth leakage breaker which is small in size and has excellent workability in mounting parts in a case and excellent insulation performance between electrodes.

【図面の簡単な説明】 【図1】本発明の第1実施例における漏電遮断器の側断
面図である。 【図2】本発明の第1実施例における漏電遮断器の平面
図である。 【図3】本発明の第1実施例における漏電遮断器の要部
組立斜視図である。 【図4】本発明の第1実施例における漏電遮断器の可動
接点台の組立斜視図である。 【図5】本発明の第1実施例における漏電遮断器のリレ
ー部斜視図である。 【図6】本発明の第1実施例における漏電遮断器の極間
絶縁台の斜視図である。 【図7】本発明の第1実施例における漏電遮断器のリレ
ー部と極間絶縁台組立斜視図である。 【図8】本発明の第1実施例における漏電遮断器のケー
スの平面図である。 【図9】本発明の第1実施例における漏電遮断器のリレ
ー部のケースへの組込み作業図である。 【図10】本発明の第1実施例における漏電遮断器のリ
レーコイルと負荷端子板との接続部の斜視図である。 【図11】本発明の第1実施例における漏電遮断器の固
定接点台とアークホーンの組付けを示す手順図を示す斜
視図で同図(a)は固定前の状態、同図(b)は固定後
の状態をそれぞれ示す図である。 【図12】従来のリレー部の平面図である。 【図13】従来の漏電遮断器のケースの平面図である。 【図14】従来のリレー部のケースへの組込み作業の初
期状態を示す図である。 【図15】従来のリレー部のケースへの組込み作業の途
中状態を示す図である。 【図16】従来のリレー部のケースへの組込み作業の終
了状態を示す図である。 【図17】本発明の第2実施例のリレー部と極間絶縁台
組立斜視図である。 【図18】本発明の第2実施例の漏電遮断器のケースの
平面図である。 【符号の説明】 7…可動絶縁軸体、8…可動接点台、9…ピン、11…
接続線(貫通線)、13…零相変流器、14…リレー
部、20…極間絶縁台、24…幅広編織導電体、25…
アークホーン、28…絶縁箱体
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of an earth leakage breaker according to a first embodiment of the present invention. FIG. 2 is a plan view of an earth leakage breaker according to the first embodiment of the present invention. FIG. 3 is a perspective view of an essential part of the earth leakage breaker according to the first embodiment of the present invention. FIG. 4 is an assembled perspective view of a movable contact point base of the earth leakage breaker according to the first embodiment of the present invention. FIG. 5 is a perspective view of a relay section of the earth leakage breaker according to the first embodiment of the present invention. FIG. 6 is a perspective view of an inter-electrode insulating base of the earth leakage breaker according to the first embodiment of the present invention. FIG. 7 is a perspective view showing the assembly of the relay unit and the inter-electrode insulating base of the earth leakage breaker according to the first embodiment of the present invention. FIG. 8 is a plan view of the case of the earth leakage breaker according to the first embodiment of the present invention. FIG. 9 is a work diagram of assembling the relay unit of the earth leakage breaker in the case according to the first embodiment of the present invention. FIG. 10 is a perspective view of a connecting portion between the relay coil and the load terminal plate of the earth leakage breaker according to the first embodiment of the present invention. FIG. 11 is a perspective view showing a procedure diagram for assembling the fixed contact base and the arc horn of the earth leakage breaker according to the first embodiment of the present invention. FIG. 11A is a state before being fixed, FIG. [Fig. 3] is a diagram showing a state after fixation. FIG. 12 is a plan view of a conventional relay unit. FIG. 13 is a plan view of a case of a conventional earth leakage breaker. FIG. 14 is a diagram showing an initial state of a work of incorporating a conventional relay unit into a case. FIG. 15 is a diagram showing a state in which a conventional relay part is being assembled into a case. FIG. 16 is a diagram showing a finished state of a work of assembling a conventional relay unit into a case. FIG. 17 is a perspective view showing the assembly of the relay unit and the inter-electrode insulating base according to the second embodiment of the present invention. FIG. 18 is a plan view of the case of the earth leakage breaker of the second embodiment of the present invention. [Explanation of Codes] 7 ... Movable insulating shaft body, 8 ... Movable contact base, 9 ... Pin, 11 ...
Connection line (penetrating line), 13 ... Zero-phase current transformer, 14 ... Relay part, 20 ... Inter-electrode insulating base, 24 ... Wide woven conductor, 25 ...
Arc horn, 28 ... Insulation box

Claims (1)

【特許請求の範囲】 1.零相変流器と、この零相変流器に接続された検出回
路と、この検出回路の出力により駆動される漏電引外装
置と、固定接触子と、消弧装置と、可動接触子と、開閉
機構と、これらを収納する筐体と、過電流検出部と過電
流引き外し装置と、これらが取り付けられた取り付け部
材を備え、上記取り付け部材を上記零相変流器の上方で
上記筐体に着脱自在に装着し、取り付け部材の極間に絶
縁壁を設けたことを特徴とする漏電遮断器。
[Claims] 1. Zero-phase current transformer, detection circuit connected to this zero-phase current transformer, earth leakage external device driven by the output of this detection circuit, fixed contact, arc extinguishing device, and movable contact. An opening / closing mechanism, a housing for housing them, an overcurrent detector, an overcurrent trip device, and a mounting member to which these are mounted, and the mounting member is provided above the zero-phase current transformer in the housing. An earth leakage circuit breaker, which is detachably attached to a body, and an insulating wall is provided between the mounting members.
JP5144571A 1993-06-16 1993-06-16 Earth leakage breaker Expired - Fee Related JP2595184B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5144571A JP2595184B2 (en) 1993-06-16 1993-06-16 Earth leakage breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5144571A JP2595184B2 (en) 1993-06-16 1993-06-16 Earth leakage breaker

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP63288843A Division JP2585763B2 (en) 1988-11-17 1988-11-17 Earth leakage breaker

Publications (2)

Publication Number Publication Date
JPH0668777A true JPH0668777A (en) 1994-03-11
JP2595184B2 JP2595184B2 (en) 1997-03-26

Family

ID=15365301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5144571A Expired - Fee Related JP2595184B2 (en) 1993-06-16 1993-06-16 Earth leakage breaker

Country Status (1)

Country Link
JP (1) JP2595184B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020053239A (en) * 2018-09-26 2020-04-02 パナソニックIpマネジメント株式会社 Wiring accessory and production method therefor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494953U (en) * 1972-04-14 1974-01-17
JPS49125863A (en) * 1973-04-06 1974-12-02
JPS5116477A (en) * 1974-07-30 1976-02-09 Omron Tateisi Electronics Co RODEN SHADANKI
JPS5651277U (en) * 1979-09-28 1981-05-07
JPS6240751U (en) * 1985-08-29 1987-03-11
JPS6333545U (en) * 1986-08-22 1988-03-04

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494953U (en) * 1972-04-14 1974-01-17
JPS49125863A (en) * 1973-04-06 1974-12-02
JPS5116477A (en) * 1974-07-30 1976-02-09 Omron Tateisi Electronics Co RODEN SHADANKI
JPS5651277U (en) * 1979-09-28 1981-05-07
JPS6240751U (en) * 1985-08-29 1987-03-11
JPS6333545U (en) * 1986-08-22 1988-03-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020053239A (en) * 2018-09-26 2020-04-02 パナソニックIpマネジメント株式会社 Wiring accessory and production method therefor

Also Published As

Publication number Publication date
JP2595184B2 (en) 1997-03-26

Similar Documents

Publication Publication Date Title
US4667263A (en) Ground fault module for ground fault circuit breaker
JP4183913B2 (en) Electromechanical contactor
CA2139470C (en) Ground fault interrupter wiring device with improved latching and actuating components
US4702002A (en) Method of forming signal processor module for ground fault circuit breaker
EP0153609A1 (en) Electrical interconnect arrangement for a GFCI magnetic sensor module plug-in subassembly
JPH0574316A (en) Circuit breaker
US4549241A (en) Ground and test arrangement for a ground fault circuit interrupter
KR100462657B1 (en) Circuit breaker
JP3227670B2 (en) Circuit breaker
US7436639B2 (en) Compact ground fault circuit interrupter module
KR940004191B1 (en) Ground fault receptacle with compact component arrangement
KR100421711B1 (en) Circuit breaker
JPH0668777A (en) Earth leakage breaker
JPH0668778A (en) Earth leakage breaker
JP3275441B2 (en) Earth leakage breaker
JP2585763B2 (en) Earth leakage breaker
JPH0668776A (en) Manufacture of earth leakage breaker
JP2901927B2 (en) Earth leakage breaker
JP2816010B2 (en) Earth leakage breaker
JP3418674B2 (en) Earth leakage breaker
JPS633068Y2 (en)
JP3106977B2 (en) Circuit breaker
JPH0448613Y2 (en)
JP2785415B2 (en) Earth leakage breaker
JP3375277B2 (en) Earth leakage breaker

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees