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JP2004227905A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
JP2004227905A
JP2004227905A JP2003013868A JP2003013868A JP2004227905A JP 2004227905 A JP2004227905 A JP 2004227905A JP 2003013868 A JP2003013868 A JP 2003013868A JP 2003013868 A JP2003013868 A JP 2003013868A JP 2004227905 A JP2004227905 A JP 2004227905A
Authority
JP
Japan
Prior art keywords
circuit breaker
insulation
insulating barrier
barrier
terminal
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
JP2003013868A
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Japanese (ja)
Other versions
JP4104996B2 (en
Inventor
Kohei Kurata
康平 倉田
Koji Okashita
広史 岡下
Kazunori Fukutani
和則 福谷
Akira Ishikawa
昌 石川
Akihiko Kamisako
彰彦 上迫
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2003013868A priority Critical patent/JP4104996B2/en
Priority to KR10-2003-0049817A priority patent/KR100527823B1/en
Priority to CNB031331920A priority patent/CN1271661C/en
Publication of JP2004227905A publication Critical patent/JP2004227905A/en
Application granted granted Critical
Publication of JP4104996B2 publication Critical patent/JP4104996B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02Housings; Casings; Bases; Mountings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08Terminals; Connections

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  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Distribution Board (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker highly reliable in insulation between external terminals by allowing a required length of an insulating barrier attached between the external terminals drawn out to provide insulation having a required length suitable for individual cases. <P>SOLUTION: In the circuit breaker for interrupting the conduction of an electric path when an overcurrent is detected, the insulating barrier 9 for enhancing insulation between external terminals is provided between the external terminals 3, 4. The insulating barrier 9 is adjustable in length drawn out along the terminals 3, 4. The insulating barrier 9 is housed in a plurality of stages in a housing groove 11 formed at an attachment base 5 of the terminals 3, 4, so that a desired number of stages can be drawn out along the terminals 3, 4 when insulation is required. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は遮断器、特に、相間に絶縁バリアが設けられた気中遮断器や配線用遮断器に関するものである。
【0002】
【従来の技術】
従来の気中遮断器においては、隣接する電源側端子および負荷側端子(電源側端子および負荷側端子を総称して外部端子という)間を導電性異物やじんあいによる短絡事故から防止するために、外部端子相間に絶縁バリアを取付けたものがある。なお、一般的な気中遮断器は、例えば、特許文献1に記載されている。
【0003】
【特許文献1】
特開平10―74442号公報
【特許文献2】
特許第2900332号公報
【0004】
【発明が解決しようとする課題】
しかし、従来の遮断器の絶縁バリアは、長さが一定であったため、遮断器を取付ける盤によっては、その長さが短すぎて必要な長さの安全な絶縁を施すことができなかったか、又は長すぎて使用できない場合があったなどの問題があった。
【0005】
この発明は、かかる問題点を解決するためになされたもので、外部端子相間に取付けた絶縁バリアを必要な長さだけ引出して得るようにして、個々のケースに適した必要な長さの絶縁を施し、相間絶縁の信頼性の高い遮断器を得ることを目的とする。
【0006】
【課題を解決するための手段】
この発明に係わる遮断器は、過電流を検出したとき、電路の通電を遮断する遮断器において、外部端子間の絶縁を強化する絶縁バリアを上記外部端子の相間に設けると共に、上記外部端子に沿う上記絶縁バリアの引出し長さを調整できるように構成したものである。
【0007】
【発明の実施の形態】
実施の形態1.
図1はこの発明の実施の形態1である遮断器を示す斜視図で、絶縁バリアを収納した状態を示す。図2は実施の形態1である遮断器を示す斜視図で、絶縁バリアを一段引き出した状態を示す。図3は実施の形態1である遮断器を示す斜視図で、絶縁バリアを二段引き出した状態を示す。図4は図3の左側面図である。図5は図4のA―A線断面図である。
【0008】
図において、気中遮断器1は、内部に一対の接点を有し、過電流を検出したとき、図示しない開閉機構が動作し、電路の通電を遮断する。アングル6は、その底面がネジなどにより外部に設けられた取付板などに固定されている。アングル6は、又、引出枠2を構成するサイドフレーム7,8に取付けられている。引出枠2は、引出枠2に設けた引出レール(図示しない)によって、遮断器を出し入れできるようにしたものである。なお、引き出し装置に収納されない遮断器の場合(実施の形態4,5の図16,図17)には、この引出枠2は不要である。
【0009】
電源側端子3は変圧器の2次側などに接続される。負荷側端子4は電動機などの負荷に接続される。電源側端子3および負荷側端子4を総称して外部端子と称する。電力の供給経路は、例えば、変圧器の2次側→外部電源側端子3→図示しない中継端子→図示しない気中遮断器の内部電源側端子→図示しない気中遮断器の接点→図示しない気中遮断器の内部負荷側端子→中継端子→外部負荷側端子4→電動機である。なお、中継端子は、外部電源側端子3、外部負荷側端子4と気中遮断器の内部電源側端子、内部負荷側端子をそれぞれ接続するものである。
【0010】
取付ベース5は、例えば、電気絶縁性の熱硬化性樹脂(フェノール樹脂など)の成形品により構成され、電源側端子3と負荷側端子4を組み込み固定する。取付ベース5は、三相の場合、3個の左取付ブロック5aと3個の右取付ブロック5bから構成されている。アングル6は取付ベース5を固定する。サイドフレーム(L)7とサイドフレーム(R)8は一対で引出枠2を構成する。絶縁バリア9は、電源側端子3と負荷側端子4相間の絶縁を強化し、導電性異物やじんあいによる短絡事故を防止するもので、ナイロン材成形品やゴムなどにより構成される。
【0011】
収納溝11(図5)は、取付ベース5に形成され、絶縁バリア9を収納すると共に、絶縁バリア9を外部端子相間の絶縁強化のため、外部端子に沿って必要な長さ引出したとき、絶縁バリア9を相間に保持固定する。図6は実施の形態1の絶縁バリアとその収納溝の部分の拡大断面図である。突起12は収納溝11の出口を狭くするように取付ベース5の端部に設けられており、絶縁バリアの二段目9cの根元部に設けられた突起9dと係合し、絶縁バリアの二段目9cの根元部の収納溝11からの引出を阻止する。突起9fは、絶縁バリアの二段目9cに形成された絶縁バリアの一段目9aの収納溝9eの出口を狭くするように、絶縁バリアの二段目9cの先端部に設けられており、絶縁バリアの一段目9aの根元部に設けられた突起9bと係合し、絶縁バリアの一段目9aの根元部の収納溝9eからの引出を阻止する。なお、絶縁バリアの二段目9cに形成された収納溝9eにおけるガイド溝9gは、絶縁バリアの一段目9aの収納と引出を案内するものである。
【0012】
図7は取付ベースの左取付ブロックを示す斜視図である。図8は電源側端子と負荷側端子の一相分を収納固定した取付ベースを示す斜視図である。図9は電源側端子と負荷側端子の三相分を積層した取付ベースを示す斜視図である。図10は取付ブロックに絶縁バリアが収納された様子を示す斜視図である。図11は絶縁バリアを収納した取付ベースと引出枠の分解斜視図である。
【0013】
図9に示す三相分を積層した取付ベースを組み立てるには、まず、図7に示す左取付ブロック5aに電源側端子3と負荷側端子4を挿入固定し、この左取付ブロック5aと右取付ブロック5bにより電源側端子3と負荷側端子4を囲うように重ねる。この状態を図8に示す。同様に三相分の取付ベース5を組み立てた後、三相分の取付ベースを積層する。この状態を図9に示す。
【0014】
図1に示す引出し式の気中遮断器を組み立てるには、図11を参照し、取付ベース5の2つの相間の収納溝11(図5)に、絶縁バリア9を気中遮断器1本体の側(電源側端子3と負荷側端子4が突出する側と反対の側)から挿入し、アングル6を取付ベース5の上部,下部に取付け、この状態で、サイドフレーム(L)7とサイドフレーム(R)8により両側からネジにより締結し固定する。その後、サイドフレーム(L)7とサイドフレーム(R)8などが取り付けられた取付ベース5を、図示しない操作ハンドルを回転させることにより、気中遮断器1本体が引出枠2に収納されると共に、電源側端子3と負荷側端子4の気中遮断器1本体側は、気中遮断器1の内部電源側端子と内部負荷側端子とにそれぞれ電気的に接続される(詳細は例えば、特許文献2参照)。なお、収納溝11の気中遮断器1本体側は気中遮断器1の絶縁性のベース20により塞がれるため、絶縁バリアの二段目9cの根元部が気中遮断器1本体側に必要以上に押し込まれることはない。
【0015】
次に以上のように構成された気中遮断器の絶縁バリア9の動作を説明する。絶縁バリア9を電源側端子3と負荷側端子4に沿って矢印(d)方向(図2)に引出すことにより、外部端子相間の絶縁を強化することができる。絶縁バリア9は突起12と突起9d、突起9fと突起9b(図6)が係合することにより引出が規制される。収納する場合には、矢印(e)方向(図2)に押し込んで、収納溝11へ格納する。また絶縁バリア9を一段階引出から二段階引出にすることにより(図2,3)、絶縁バリア9の外部端子に沿う引出長さ(c)を(c‘)に変更できる。このため、外部端子相間に取付けた絶縁バリアを外部端子に沿って必要な長さだけ引出して、個々のケースに適した必要な長さの絶縁を施し、相間絶縁の信頼性の高い遮断器を得ることができる。
なお、絶縁バリア9を二段式の伸縮形式で示したが、三段式の伸縮形式などの複数段式の伸縮形式であっても良い。
【0016】
実施の形態2.
また、絶縁バリア9の一段目と二段目をゴムのような電気的絶縁性の弾性体で形成して、突起9dと収納溝11および突起9bと収納溝9e間が弾性的に圧迫を受けながら摺動する(弾性摺動する)ように構成すると、絶縁バリア9の一段目又は二段目の引出途中でもその位置で比較的強固に保持させることができる。
【0017】
実施の形態3.
図12はこの発明の実施形態3である遮断器を示す斜視図で、絶縁バリアを収納した状態を示す。図13は図12の絶縁バリアを引出した状態を示す斜視図である。図14は図12の絶縁バリアを取りはずした状態を示す斜視図である。図15は絶縁バリアの取付を示す斜視図である。図において、実施の形態1と同一の符号を付したものは、同一またはこれに相当するものを示す。スプリングローラー14は、例えばタチカワブラインド社製のロールスクリーンであり、圧延されたゴムのシート(厚さ1mm、幅200mm、引出し長さ200mm)をロール状に巻いたもので、絶縁バリア9に設けた取っ手(ゴムシートの先端部に設けた膨らみ部)を持って引き出すことにより、外部端子に沿う引出し長さが調整できる。
【0018】
スプリングローラー14の取付は、図15に示すように、一方の取付ブロック(例えば右取付ブロック5a)の上下の取付用凹部16に上下のスプリングローラー取付用突起15を半圧入し、この半圧入状態で、他方の取付ブロック(例えば左取付ブロック5b)の上下の取付用凹部16に上下のスプリングローラー取付用突起15を半圧入することにより行われる。つまり、一対の取付ブロック5a,5bで一個のスプリングローラー14を固定する。
【0019】
次に以上のように構成された気中遮断器1の絶縁バリア9の動作を説明する。絶縁バリア9を外部端子に沿う矢印(f)方向(図13)に緩やかに引出すことにより、絶縁バリア9はスプリングローラー14により所望の引出長さc“にすることができ、実施の形態1と同様に外部端子相間の絶縁を強化することができる。また、絶縁バリア9を一旦矢印(f)方向に急に少し引いて離すことにより、矢印(g)方向に吸い込まれて収納できる。絶縁バリア9の紛失防止の観点からは、製品の出荷時点で、絶縁バリア9を取付ベース5の収納溝17の取付用凹部16に圧入し、固定しておくことが好ましい。また、実施の形態1に比較して、スプリングローラー14の収納溝17は取付ベース5の奥行き方向長さが短くてよい。
【0020】
実施の形態4.
図16は実施の形態4を示す遮断器の斜視図である。実施の形態4は実施の形態1〜3と異なり、気中遮断器1の本体ベースに絶縁バリア9が設けられている。絶縁性の本体ベース20には、電源側端子21、負荷側端子22が突出しており、その相間壁20aに収納溝11が設けられ、その収納溝11に絶縁バリア9が設けられている。絶縁バリア9および収納溝11については、実施の形態1と同様であるのでその説明を省略する。本体ベース20には中間ベース23を介してカバー24が取付固定されている。相間壁20aの端面は中間ベース23により塞がれるので、絶縁バリア9が中間ベース23側に入り込むことはない。
【0021】
実施の形態5.
実施の形態1〜4では気中遮断器について説明したが、この発明は配線用遮断器にも適用できる。図17はこの発明の実施の形態5に係る遮断器の斜視図である。図18は図17の遮断器の組み立てを説明する分解斜視図である。図19は図17の遮断器の収納溝に絶縁バリアが収納された状態を説明する部分図である。
【0022】
図17に示すように、配線用遮断器(Molded Case Circuit Breaker)30は、カバー31、ベース35により形成されるケースの内部に一対の接点を有し、電路に発生した過電流を遮断するものである。図17は三相用の配線用遮断器30の例を示しており、カバー31、ベース35は絶縁性のモールド樹脂の成形品により構成されている。
【0023】
図18を参照して、配線用遮断器30の組み立てについて説明する。ベース35の相間壁36の一端に設けられた収納溝37に絶縁バリア40を挿入する(図19)。その後、ベース35に端子板34(すなわち外部端子)(図17)、接点を有する固定接触子および可動接触子(図示しない)、可動接触子を開閉させる開閉機構(図示しない)、過電流を検出し、開閉機構を駆動させる過電流検出機構(図示しない)などを配置する。その後、カバー31をベース35に被せ、ベース35にカバー31をネジ(図示しない)により固定することにより図17に示す配線用遮断器30が完成する。
【0024】
図18,図19を参照して、絶縁バリア40について説明する。実施の形態1と同様の材料により形成された絶縁バリア40の板状部40aは、相間壁36の先端部(外側端部)に設けられた突起36a、36a間をスライド可能な板厚となっている。他方、絶縁バリア40の根元部には突起40bが設けられており、この突起40bは収納溝37をスライド可能でかつ突起36a、36a間はスライドできない大きさに形成されている。
したがって、絶縁バリア40は、図17のp−q方向(ベース35の長手方向で、外部端子に沿う方向)に所望長さスライド可能(引き出し可能)となると共に、カバー31により上部が固定されるので、配線用遮断器30の組み立て後は、カバー31およびベース35からなるケースから脱落しないように保持される。
【0025】
なお、収納溝37の長さ(ベース35の長手方向の長さ)よりも絶縁バリア40が長い例について説明したが、実施の形態1に示すように、2段式の伸縮形式の絶縁バリア、或いは実施の形態3に示すように、ロールタイプの絶縁バリアを用いることも可能であり、これらの場合には、収納溝37内に絶縁バリアの大部分を収納することができるので、配線用遮断器を搬送する際に小型化できる。
【0026】
【発明の効果】
以上説明したように、この発明の遮断器によれば、外部端子間の絶縁を強化する絶縁バリアを上記外部端子の相間に設けると共に、上記外部端子に沿う上記絶縁バリアの引出し長さを調整できるように構成したので、外部端子相間に取付けた絶縁バリアを必要な長さだけ引出しできるため、個々のケースに適した必要な長さの絶縁を施して、相間絶縁の信頼性の高い遮断器を得ることができる。
【図面の簡単な説明】
【図1】この発明の実施の形態1である遮断器を示す斜視図で、絶縁バリアを収納した状態を示す。
【図2】実施の形態1である遮断器を示す斜視図で、絶縁バリアを一段引き出した状態を示す。
【図3】実施の形態1である遮断器を示す斜視図で、絶縁バリアを二段引き出した状態を示す。
【図4】図3の左側面図である。
【図5】図4のA―A線断面図である。
【図6】実施の形態1の絶縁バリアとその収納溝の部分の拡大断面図である。
【図7】実施の形態1における取付ベースの左取付ブロックを示す斜視図である。
【図8】実施の形態1における電源側端子と負荷側端子の一相分を収納固定した取付ベースを示す斜視図である。
【図9】実施の形態1における電源側端子と負荷側端子の三相分を積層した取付ベースを示す斜視図である。
【図10】実施の形態1における取付ブロックに絶縁バリアが収納された様子を示す斜視図である。
【図11】実施の形態1における絶縁バリアを収納した取付ベースと引出枠の分解斜視図である。
【図12】実施形態3である遮断器を示す斜視図で、絶縁バリアを収納した状態を示す。
【図13】図12の絶縁バリアを引出した状態を示す斜視図である。
【図14】図12の絶縁バリアを取りはずした状態を示す斜視図である。
【図15】実施の形態3における絶縁バリアの取付を示す斜視図である。
【図16】実施の形態4を示す遮断器の斜視図である。
【図17】実施の形態5に係る遮断器の斜視図である。
【図18】図17の遮断器の組み立てを説明する分解斜視図である。
【図19】図17の遮断器の収納溝に絶縁バリアが収納された状態を説明する部分図である。
【符号の説明】
1 気中遮断器 2 引出枠
3 電源側端子 4 負荷側端子
5 取付ベース 6 アングル
7 サイドプレート(L) 8 サイドプレート(R)
9 絶縁バリア 9a 絶縁バリアの一段目
9b 突起 9c 絶縁バリアの二段目
9d 突起 9e 収納溝
9f 突起 9g ガイド溝
11 収納溝 12 突起
14 スプリングローラー 15 取付用突起
16 取付用凹部 17 収納溝
20 本体ベース 20a 相間壁
21 電源側端子 22 負荷側端子
23 中間ベース 24 カバー
30 配線用遮断器 31 カバー
34 端子板 35 ベース
36 相間壁 36a 突起
37 収納溝 40 絶縁バリア
40a 板状部 40b 突起。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a circuit breaker, and more particularly to an air circuit breaker and a wiring circuit breaker provided with an insulating barrier between phases.
[0002]
[Prior art]
In a conventional air circuit breaker, in order to prevent a short circuit accident due to conductive foreign matter or dust between adjacent power supply side terminals and load side terminals (the power supply side terminals and the load side terminals are collectively referred to as external terminals), Some have an insulation barrier attached between external terminal phases. Note that a general air circuit breaker is described in, for example, Patent Document 1.
[0003]
[Patent Document 1]
JP-A-10-74442 [Patent Document 2]
Japanese Patent No. 2900332 [0004]
[Problems to be solved by the invention]
However, because the insulation barrier of the conventional circuit breaker had a constant length, depending on the board on which the circuit breaker was mounted, the length was too short to provide the required length of safe insulation, Or, there was a problem that it was too long to use.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an insulation barrier attached between external terminal phases is drawn out by a required length to obtain a required length of insulation suitable for each case. The purpose of the present invention is to obtain a circuit breaker with high interphase insulation reliability.
[0006]
[Means for Solving the Problems]
The circuit breaker according to the present invention is a circuit breaker that cuts off current to an electric circuit when an overcurrent is detected. In the circuit breaker, an insulation barrier for strengthening insulation between external terminals is provided between the external terminals and along the external terminals. The structure is such that the length of drawing out the insulating barrier can be adjusted.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a circuit breaker according to Embodiment 1 of the present invention, showing a state in which an insulating barrier is housed. FIG. 2 is a perspective view showing the circuit breaker according to the first embodiment, and shows a state where an insulating barrier is pulled out one step. FIG. 3 is a perspective view showing the circuit breaker according to the first embodiment, and shows a state where the insulating barrier is drawn out in two steps. FIG. 4 is a left side view of FIG. FIG. 5 is a sectional view taken along line AA of FIG.
[0008]
In the figure, the air circuit breaker 1 has a pair of contacts inside, and when an overcurrent is detected, an opening / closing mechanism (not shown) operates to cut off the power supply to the electric circuit. The angle 6 has its bottom surface fixed to a mounting plate or the like provided outside with screws or the like. The angle 6 is also attached to side frames 7 and 8 constituting the drawer frame 2. The drawer frame 2 is configured such that a circuit breaker can be taken in and out by a drawer rail (not shown) provided in the drawer frame 2. In the case of a circuit breaker that is not housed in the drawer device (FIGS. 16 and 17 of the fourth and fifth embodiments), the drawer frame 2 is unnecessary.
[0009]
The power supply terminal 3 is connected to the secondary side of the transformer. The load terminal 4 is connected to a load such as a motor. The power supply terminal 3 and the load terminal 4 are collectively referred to as external terminals. The power supply path is, for example, the secondary side of the transformer → the external power supply side terminal 3 → the relay terminal not shown → the internal power supply side terminal of the air circuit breaker not shown → the contact of the air circuit breaker not shown → the air not shown The internal load side terminal of the middle circuit breaker → the relay terminal → the external load side terminal 4 → the motor. The relay terminals connect the external power terminal 3 and the external load terminal 4 to the internal power terminal and the internal load terminal of the air circuit breaker, respectively.
[0010]
The mounting base 5 is formed of, for example, a molded product of an electrically insulating thermosetting resin (phenol resin or the like), and incorporates and fixes the power supply terminal 3 and the load terminal 4. The mounting base 5 is composed of three left mounting blocks 5a and three right mounting blocks 5b in the case of three phases. The angle 6 fixes the mounting base 5. The side frame (L) 7 and the side frame (R) 8 constitute the drawer frame 2 as a pair. The insulation barrier 9 strengthens insulation between the power supply terminal 3 and the four terminals of the load terminal, and prevents a short circuit accident due to conductive foreign matter or dust. The insulation barrier 9 is made of a molded nylon material or rubber.
[0011]
The storage groove 11 (FIG. 5) is formed in the mounting base 5 to store the insulation barrier 9 and, when the insulation barrier 9 is pulled out along a necessary length along the external terminal in order to strengthen the insulation between the external terminal phases, The insulating barrier 9 is held and fixed between the phases. FIG. 6 is an enlarged cross-sectional view of a portion of the insulating barrier and the storage groove according to the first embodiment. The protrusion 12 is provided at the end of the mounting base 5 so as to narrow the exit of the storage groove 11, and engages with the protrusion 9 d provided at the base of the second step 9 c of the insulating barrier to form the second part of the insulating barrier. The pull-out of the root of the step 9c from the storage groove 11 is prevented. The protrusion 9f is provided at the tip of the second step 9c of the insulating barrier so as to narrow the exit of the storage groove 9e of the first step 9a of the insulating barrier formed in the second step 9c of the insulating barrier. It engages with a projection 9b provided at the base of the first step 9a of the barrier, and prevents the base of the first step 9a of the insulating barrier from being pulled out of the storage groove 9e. The guide groove 9g in the storage groove 9e formed in the second step 9c of the insulation barrier guides the storage and withdrawal of the first step 9a of the insulation barrier.
[0012]
FIG. 7 is a perspective view showing a left mounting block of the mounting base. FIG. 8 is a perspective view showing a mounting base in which one phase of the power supply terminal and the load terminal is stored and fixed. FIG. 9 is a perspective view showing a mounting base in which three phases of a power supply terminal and a load terminal are stacked. FIG. 10 is a perspective view showing a state where the insulating barrier is stored in the mounting block. FIG. 11 is an exploded perspective view of a mounting base and a drawer frame that house the insulating barrier.
[0013]
In order to assemble the mounting base in which three phases are stacked as shown in FIG. 9, first, the power supply side terminal 3 and the load side terminal 4 are inserted and fixed in the left mounting block 5a shown in FIG. The power supply side terminal 3 and the load side terminal 4 are overlapped so as to surround the block 5b. This state is shown in FIG. Similarly, after assembling the mounting bases 5 for three phases, the mounting bases for three phases are laminated. This state is shown in FIG.
[0014]
In order to assemble the drawer type air circuit breaker shown in FIG. 1, referring to FIG. 11, the insulating barrier 9 is provided in the storage groove 11 (FIG. 5) between the two phases of the mounting base 5 in the main body of the air circuit breaker 1. Side (the side opposite to the side from which the power supply side terminal 3 and the load side terminal 4 protrude), and the angles 6 are mounted on the upper and lower portions of the mounting base 5. In this state, the side frame (L) 7 and the side frame (R) Fasten and fix with screws from both sides by 8. Thereafter, the main body of the air circuit breaker 1 is stored in the draw-out frame 2 by rotating the operation handle (not shown) of the mounting base 5 to which the side frame (L) 7 and the side frame (R) 8 are mounted. The main body side of the air circuit breaker 1 of the power supply side terminal 3 and the load side terminal 4 is electrically connected to the internal power supply side terminal and the internal load side terminal of the air circuit breaker 1, respectively (for details, see Patent Reference 2). In addition, since the main body side of the air circuit breaker 1 of the storage groove 11 is closed by the insulating base 20 of the air circuit breaker 1, the root portion of the second stage 9c of the insulation barrier is located on the main body side of the air circuit breaker 1. It will not be pushed more than necessary.
[0015]
Next, the operation of the insulating barrier 9 of the air circuit breaker configured as described above will be described. By pulling out the insulating barrier 9 along the power supply side terminal 3 and the load side terminal 4 in the direction of arrow (d) (FIG. 2), the insulation between the external terminal phases can be strengthened. The protrusion of the insulating barrier 9 is restricted by the engagement of the protrusion 12 with the protrusion 9d and the protrusion 9f with the protrusion 9b (FIG. 6). When storing, it is pushed in the direction of the arrow (e) (FIG. 2) and stored in the storage groove 11. By changing the insulating barrier 9 from one-step drawing to two-step drawing (FIGS. 2 and 3), the drawing length (c) along the external terminals of the insulating barrier 9 can be changed to (c ′). For this reason, the insulation barrier attached between the external terminals is pulled out along the required length along the external terminals to provide the required length of insulation suitable for each case, and to provide a highly reliable circuit breaker for interphase insulation. Obtainable.
Although the insulating barrier 9 is shown as a two-stage telescopic type, it may be a multi-stage telescopic type such as a three-stage telescopic type.
[0016]
Embodiment 2 FIG.
Further, the first and second stages of the insulating barrier 9 are formed of an electrically insulating elastic material such as rubber, and the space between the protrusion 9d and the storage groove 11 and the space between the protrusion 9b and the storage groove 9e are elastically pressed. If it is configured to slide while sliding (elastic sliding), the insulating barrier 9 can be held relatively firmly at that position even during the first or second stage of drawing.
[0017]
Embodiment 3 FIG.
FIG. 12 is a perspective view showing a circuit breaker according to Embodiment 3 of the present invention, showing a state where an insulating barrier is housed. FIG. 13 is a perspective view showing a state where the insulating barrier of FIG. 12 is drawn. FIG. 14 is a perspective view showing a state where the insulating barrier of FIG. 12 is removed. FIG. 15 is a perspective view showing the attachment of the insulation barrier. In the drawings, the same reference numerals as those in the first embodiment denote the same or corresponding components. The spring roller 14 is, for example, a roll screen manufactured by Tachikawa Blind Co., Ltd., and is formed by rolling a rolled rubber sheet (thickness: 1 mm, width: 200 mm, draw-out length: 200 mm) in a roll shape and provided on the insulating barrier 9. By pulling out the handle (the bulge provided at the tip of the rubber sheet), the length of the pullout along the external terminal can be adjusted.
[0018]
As shown in FIG. 15, the spring roller 14 is mounted by half-pressing the upper and lower spring roller mounting projections 15 into the upper and lower mounting recesses 16 of one of the mounting blocks (for example, the right mounting block 5a). This is performed by half-pressing the upper and lower spring roller mounting projections 15 into the upper and lower mounting recesses 16 of the other mounting block (for example, the left mounting block 5b). That is, one spring roller 14 is fixed by the pair of mounting blocks 5a and 5b.
[0019]
Next, the operation of the insulating barrier 9 of the air circuit breaker 1 configured as described above will be described. By gradually pulling out the insulating barrier 9 in the direction of the arrow (f) (FIG. 13) along the external terminal, the insulating barrier 9 can be set to a desired length c ″ by the spring roller 14. Similarly, the insulation between the external terminal phases can be strengthened, and the insulation barrier 9 can be sucked in the direction of the arrow (g) and housed by pulling it slightly away once in the direction of the arrow (f). From the viewpoint of preventing loss of 9, it is preferable that the insulating barrier 9 is press-fitted into the mounting recess 16 of the storage groove 17 of the mounting base 5 and fixed at the time of shipment of the product. In comparison, the storage groove 17 of the spring roller 14 may have a shorter length in the depth direction of the mounting base 5.
[0020]
Embodiment 4 FIG.
FIG. 16 is a perspective view of a circuit breaker according to the fourth embodiment. The fourth embodiment differs from the first to third embodiments in that an insulating barrier 9 is provided on the main body base of the air circuit breaker 1. A power supply side terminal 21 and a load side terminal 22 protrude from the insulating main body base 20, and a storage groove 11 is provided in an inter-wall 20 a thereof, and an insulation barrier 9 is provided in the storage groove 11. Since the insulating barrier 9 and the storage groove 11 are the same as in the first embodiment, the description is omitted. A cover 24 is attached and fixed to the main body base 20 via an intermediate base 23. Since the end face of the interphase wall 20a is closed by the intermediate base 23, the insulating barrier 9 does not enter the intermediate base 23 side.
[0021]
Embodiment 5 FIG.
In the first to fourth embodiments, the air circuit breaker has been described, but the present invention is also applicable to a circuit breaker for wiring. FIG. 17 is a perspective view of a circuit breaker according to Embodiment 5 of the present invention. FIG. 18 is an exploded perspective view for explaining the assembly of the circuit breaker of FIG. FIG. 19 is a partial view illustrating a state where the insulating barrier is housed in the housing groove of the circuit breaker of FIG.
[0022]
As shown in FIG. 17, a wiring case breaker (Molded Circuit Circuit Breaker) 30 has a pair of contacts inside a case formed by a cover 31 and a base 35, and cuts off an overcurrent generated in an electric circuit. It is. FIG. 17 shows an example of the circuit breaker 30 for three phases, in which the cover 31 and the base 35 are formed of a molded product of an insulating mold resin.
[0023]
The assembly of the circuit breaker 30 will be described with reference to FIG. The insulating barrier 40 is inserted into the storage groove 37 provided at one end of the inter-layer wall 36 of the base 35 (FIG. 19). Thereafter, a terminal plate 34 (that is, an external terminal) (FIG. 17) on the base 35, fixed and movable contacts having contacts (not shown), an opening / closing mechanism for opening and closing the movable contacts (not shown), and overcurrent detection Then, an overcurrent detection mechanism (not shown) for driving the opening / closing mechanism is disposed. Thereafter, the cover 31 is put on the base 35, and the cover 31 is fixed to the base 35 with screws (not shown), thereby completing the wiring breaker 30 shown in FIG.
[0024]
The insulating barrier 40 will be described with reference to FIGS. The plate-like portion 40a of the insulating barrier 40 formed of the same material as that of the first embodiment has a thickness that allows sliding between the protrusions 36a provided at the front end (outer end) of the interphase wall 36. ing. On the other hand, a protrusion 40b is provided at the base of the insulating barrier 40, and the protrusion 40b is formed in such a size that it can slide in the storage groove 37 and cannot slide between the protrusions 36a.
Accordingly, the insulating barrier 40 can be slid (pulled out) by a desired length in the pq direction (the longitudinal direction of the base 35 along the external terminal) in FIG. 17 and the upper part is fixed by the cover 31. Therefore, after the wiring breaker 30 is assembled, the wiring breaker 30 is held so as not to fall off the case formed of the cover 31 and the base 35.
[0025]
Although the example in which the insulating barrier 40 is longer than the length of the storage groove 37 (the length in the longitudinal direction of the base 35) has been described, as shown in Embodiment 1, a two-stage telescopic insulating barrier, Alternatively, as shown in Embodiment 3, it is also possible to use a roll-type insulating barrier. In these cases, most of the insulating barrier can be stored in the storage groove 37, so that the wiring isolation The size can be reduced when transporting the container.
[0026]
【The invention's effect】
As described above, according to the circuit breaker of the present invention, it is possible to provide the insulating barrier for enhancing the insulation between the external terminals between the phases of the external terminals, and to adjust the extension length of the insulating barrier along the external terminals. With this configuration, the insulation barrier attached between the external terminal phases can be pulled out to the required length, so that the required length of insulation suitable for each case is applied to provide a highly reliable circuit breaker for interphase insulation. Obtainable.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a circuit breaker according to Embodiment 1 of the present invention, showing a state where an insulating barrier is housed.
FIG. 2 is a perspective view showing the circuit breaker according to the first embodiment, showing a state where an insulating barrier is drawn out one step.
FIG. 3 is a perspective view showing the circuit breaker according to the first embodiment, showing a state where an insulating barrier is drawn out in two steps.
FIG. 4 is a left side view of FIG. 3;
FIG. 5 is a sectional view taken along line AA of FIG. 4;
FIG. 6 is an enlarged sectional view of a portion of the insulating barrier and the storage groove of the insulating barrier according to the first embodiment.
FIG. 7 is a perspective view showing a left mounting block of the mounting base according to the first embodiment.
FIG. 8 is a perspective view showing a mounting base in which one phase of the power supply terminal and the load terminal is accommodated and fixed in the first embodiment.
FIG. 9 is a perspective view showing a mounting base in which three phases of a power supply terminal and a load terminal are laminated in the first embodiment.
FIG. 10 is a perspective view showing a state in which an insulating barrier is housed in a mounting block according to the first embodiment.
FIG. 11 is an exploded perspective view of a mounting base and a drawer frame accommodating the insulating barrier according to the first embodiment.
FIG. 12 is a perspective view showing a circuit breaker according to a third embodiment, showing a state where an insulating barrier is housed.
FIG. 13 is a perspective view showing a state where the insulating barrier of FIG. 12 is drawn.
FIG. 14 is a perspective view showing a state where the insulating barrier of FIG. 12 is removed.
FIG. 15 is a perspective view showing attachment of an insulating barrier according to the third embodiment.
FIG. 16 is a perspective view of a circuit breaker according to a fourth embodiment.
FIG. 17 is a perspective view of a circuit breaker according to Embodiment 5.
FIG. 18 is an exploded perspective view illustrating the assembly of the circuit breaker of FIG.
19 is a partial view illustrating a state where the insulating barrier is housed in the housing groove of the circuit breaker of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air circuit breaker 2 Drawer frame 3 Power supply side terminal 4 Load side terminal 5 Mounting base 6 Angle 7 Side plate (L) 8 Side plate (R)
Reference Signs List 9 Insulation barrier 9a First stage 9b projection of insulation barrier 9c Second stage 9d projection of insulation barrier 9e Storage groove 9f Projection 9g Guide groove 11 Storage groove 12 Projection 14 Spring roller 15 Mounting projection 16 Mounting recess 17 Storage groove 20 Main body base 20a Interphase wall 21 Power supply terminal 22 Load side terminal 23 Intermediate base 24 Cover 30 Circuit breaker 31 Cover 34 Terminal plate 35 Base 36 Interphase wall 36a Projection 37 Storage groove 40 Insulation barrier 40a Plate portion 40b Projection.

Claims (7)

過電流を検出したとき、電路の通電を遮断する遮断器において、外部端子間の絶縁を強化する絶縁バリアを上記外部端子の相間に設けると共に、上記外部端子に沿う上記絶縁バリアの引出し長さを調整できるように構成したことを特徴とする遮断器。When an overcurrent is detected, in a circuit breaker that cuts off current supply to an electric circuit, an insulation barrier that strengthens insulation between external terminals is provided between phases of the external terminals, and a drawing length of the insulation barrier along the external terminals is reduced. A circuit breaker characterized in that it can be adjusted. 上記絶縁バリアは上記外部端子の取付ベースに設けた収納溝に収納され、絶縁を要するときに、上記外部端子に沿って所要長さ引き出されるように構成した請求項1記載の遮断器。2. The circuit breaker according to claim 1, wherein the insulating barrier is housed in a housing groove provided in a mounting base of the external terminal, and is pulled out along a required length along the external terminal when insulation is required. 上記絶縁バリアは上記外部端子の取付ベースに設けた上記収納溝に複数段形式で収納され、絶縁を要するときに、上記外部端子に沿って所要段数引き出されるように構成した請求項2記載の遮断器。3. The shut-off according to claim 2, wherein the insulation barrier is housed in a plurality of steps in the storage groove provided in the mounting base of the external terminal, and when insulation is required, a required number of steps are drawn out along the external terminal. vessel. 上記絶縁バリアは弾性体で形成され、上記収納溝との間で弾性摺動し得るようにした請求項2又は請求項3記載の遮断器。The circuit breaker according to claim 2, wherein the insulating barrier is formed of an elastic body, and can be elastically slid between the housing and the storage groove. 上記絶縁バリアは、絶縁性ゴムシートをロール状に巻いて、上記外部端子の取付ベースに設けた収納溝に収納され、絶縁を要するときに、上記外部端子に沿って所要長さ引き出されるように構成した請求項1又は請求項2記載の遮断器。The insulating barrier is formed by winding an insulating rubber sheet into a roll and housed in a housing groove provided in a mounting base of the external terminal. When insulation is required, the insulating barrier is pulled out along the external terminal by a required length. The circuit breaker according to claim 1 or 2, wherein the circuit breaker is configured. 上記絶縁バリアは遮断器の本体ベースに設けた収納溝に収納され、絶縁を要するときに、上記外部端子に沿って所要長さ引き出されるように構成した請求項1記載の遮断器。The circuit breaker according to claim 1, wherein the insulation barrier is housed in a housing groove provided in a main body base of the circuit breaker, and is pulled out along a required length along the external terminal when insulation is required. 上記絶縁バリアは配線用遮断器の上記外部端子の相間壁に設けた収納溝に収納され、絶縁を要するときに、上記外部端子に沿って所要長さ引き出されるように構成した請求項1記載の遮断器。2. The insulation barrier according to claim 1, wherein the insulation barrier is housed in a storage groove provided in a wall between the external terminals of the circuit breaker, and is pulled out along the external terminal when insulation is required. Circuit breaker.
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JP2009055732A (en) * 2007-08-28 2009-03-12 Mitsubishi Electric Corp Drawer type circuit breaker, terminal device of drawer type circuit breaker, and interphase insulating panel of terminal device
KR101148796B1 (en) * 2010-12-31 2012-05-24 엘에스산전 주식회사 Circuit breaker
JP2016158419A (en) * 2015-02-25 2016-09-01 日東工業株式会社 Distribution board
KR101823516B1 (en) * 2016-08-31 2018-01-30 엘에스산전 주식회사 Trip mechanism for dc molded case circuit breaker
CN107785218A (en) * 2016-08-31 2018-03-09 Ls 产电株式会社 Tripping mechanism for direct current molded case circuit breakers
US10332714B2 (en) 2016-08-31 2019-06-25 Lsis Co., Ltd. Trip mechanism for direct current molded case circuit breaker
WO2018211579A1 (en) * 2017-05-16 2018-11-22 三菱電機株式会社 Drawer-type circuit breaker
EP3627640B1 (en) * 2017-05-16 2021-11-17 Mitsubishi Electric Corporation Drawer-type circuit breaker
WO2019116498A1 (en) * 2017-12-14 2019-06-20 三菱電機株式会社 Drawer-type breaker

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JP4104996B2 (en) 2008-06-18
CN1271661C (en) 2006-08-23
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CN1518031A (en) 2004-08-04
KR20040067785A (en) 2004-07-30

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