JP2006351557A

JP2006351557A - Circuit breaker and distribution board

Info

Publication number: JP2006351557A
Application number: JP2006271194A
Authority: JP
Inventors: Toshiaki Matsushita; 寿朗松下; Masaaki Kabe; 雅章可部
Original assignee: Toshiba Lighting and Technology Corp; Kyokuto Electric Co Ltd
Current assignee: Toshiba Lighting and Technology Corp; Kyokuto Electric Co Ltd
Priority date: 2006-10-02
Filing date: 2006-10-02
Publication date: 2006-12-28
Anticipated expiration: 2022-05-09
Also published as: JP4486949B2

Abstract

<P>PROBLEM TO BE SOLVED: To make it easy and sure to change between a 100 V connection and 200 V connection of a circuit breaker equipped in a distribution board. <P>SOLUTION: A power source connection housing part 64 of the circuit breaker 11 houses a power source connection part 21 rotatably. The power source connection part 21 is provided with two switch knobs 66 each having a connection terminal 77. In a state of a terminal door being open, each switch knob 66 is rotated and connected with an available conductive bar N, L1, so that a changing between a 100 V connection and 200 V connection is made possible. In a state of the terminal door being closed, each switch knob 66 does not rotate and the connection terminal 77 can be fixed firm. On a top face 33 of a box 12, a display window 65 is provided. In accordance with a movement of the connection terminal 77, a display means 81 is rotated and the display means 81 shows a 200 V connection through the display window 65. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば、単相三線式の分電盤に取り付けられる回路遮断器及び分電盤に関する。 The present invention relates to a circuit breaker and a distribution board that are attached to, for example, a single-phase three-wire distribution board.

従来、分電盤には分岐ブレーカとして用いられる回路遮断器が設けられている。そして、単相三線式の分電盤に用いられる回路遮断器について、２個の端子を備え、これら２個の端子のうちの一方の端子に導電バーを選択的に接続することにより、１００Ｖと２００Ｖとを切り替えて使用可能な構成が知られている。そして、このような従来技術として、器体の一端部に位置して、それぞれ導電バーを差込み可能な３段の差込部を形成し、最下段の差込部に連通する収納部には共通端子を配置するとともに、上側の２段の差込部に連通する内方収納部には１個の選択端子を上下にスライド可能に収納したスライド部材を備える構成が知られている。そして、このような構成では、共通端子に導電バーを接続するとともに、選択端子をいずれかの差込部に移動させた状態で導電バーを接続することにより、１００Ｖと２００Ｖとを切り替えて使用することが可能になっている(例えば、特許文献１参照。)。
特開２０００−３５３４１号公報 Conventionally, the distribution board is provided with a circuit breaker used as a branch breaker. And about the circuit breaker used for a single-phase three-wire distribution board, it is provided with two terminals, and by selectively connecting a conductive bar to one of these two terminals, 100V and A configuration that can be used by switching between 200V is known. And as such a prior art, it is located in the one end part of a container, forms the insertion part of 3 steps | paragraphs which can each insert a conductive bar, and is common to the storage part connected to the insertion part of the lowest stage. A configuration is known in which a terminal is disposed and an inner storage portion communicating with the upper two-stage insertion portion includes a slide member in which one selection terminal is slidably stored in the vertical direction. And in such a structure, while connecting a conductive bar to a common terminal and connecting a conductive bar in the state which moved the selection terminal to one of the insertion parts, it switches and uses 100V and 200V (See, for example, Patent Document 1).
JP 2000-35341 A

上記従来のように、固定された共通端子とスライドにより移動可能な選択端子を備える構成では、例えば、上から下へのスライドでは、上面から内方収納部に連通する通孔に工具などを押し込み選択端子を移動させ、逆に、下から上へのスライドでは、内方収納部から外側に突出した突出部を下から上側に移動させて選択端子を移動させる作業が必要になり、選択端子の操作部が移動方向により異なるため、操作が紛らわしい問題を有している。 In the configuration including the fixed common terminal and the selection terminal movable by the slide as in the conventional case, for example, when sliding from the top to the bottom, a tool or the like is pushed into the through hole communicating with the inner storage portion from the upper surface. On the contrary, when sliding from the bottom to the top by moving the selection terminal, it is necessary to move the selection terminal by moving the protrusion protruding outward from the inner storage part from the bottom to the top. Since the operation unit varies depending on the moving direction, there is a problem that the operation is misleading.

本発明は、このような点に鑑みなされたもので、電源接続部の切替動作を容易かつ確実にできる回路遮断器及び分電盤を提供することを目的とする。 This invention is made | formed in view of such a point, and it aims at providing the circuit breaker and distribution board which can perform switching operation | movement of a power supply connection part easily and reliably.

請求項１記載の回路遮断器は、それぞれ接続端子を備えた２個の電源接続部と；各電源接続部をそれぞれ前後方向を軸方向として回動可能に収納する電源接続部収納部と；電源接続部収納部の一側部から端面部にかけて設けられた開口部と；この開口部を開閉し、開いた状態で電源接続部の回動を許容し、閉じた状態で電源接続部の回動を阻止する回動可能な端子ドアと；表示窓を有し、この表示窓の部分を除いて電源接続部収納部の上部の全面を覆い、筐体を構成する天面部と；電源接続部収納部に収納され、電源接続部の回動に伴い表示窓から表示を行う表示手段と；負荷に接続される負荷接続部と；電源接続部と負荷接続部との間の回路を遮断可能に接続する回路遮断部と；を具備したものである。 The circuit breaker according to claim 1 includes two power connection portions each having a connection terminal; a power connection portion storage portion that stores each power connection portion so as to be rotatable about the front-rear direction as an axial direction; An opening provided from one side to the end surface of the connecting portion storage portion; opening and closing the opening, allowing the power connecting portion to rotate when opened, and rotating the power connecting portion when closed A pivotable terminal door that has a display window, and covers the entire upper surface of the power connection housing portion except for the display window portion, and a top surface portion constituting the housing; A display means that is stored in the unit and displays from the display window as the power supply connection unit rotates; a load connection unit connected to the load; a circuit between the power supply connection unit and the load connection unit can be disconnected And a circuit interrupting unit.

そして、この構成では、端子ドアを開いた状態で、接続端子を回動させることにより、接続端子の位置が容易に切り替えられ、例えば、電圧と相とが切り替えられる。また、端子ドアを閉じた状態で、端子ドアの回動が抑止され、接続端子の位置が固定される。筐体を構成する天面部が、表示窓の部分を除いて電源接続部収納部の上部の全面が覆われる。 And in this structure, the position of a connection terminal is easily switched by rotating a connection terminal in the state which opened the terminal door, for example, a voltage and a phase are switched. Moreover, in the state which closed the terminal door, rotation of a terminal door is suppressed and the position of a connection terminal is fixed. The top surface portion constituting the housing covers the entire upper surface of the power supply connection portion storage portion except for the display window portion.

請求項２記載の回路遮断器は、請求項１記載の回路遮断器において、電源接続部は、接続端子を取り付けた切替つまみを備え、表示手段は、接続端子及び切替つまみとは別体の合成樹脂にて形成され、電源接続部収納部の上部に配置されたものである。 The circuit breaker according to claim 2 is the circuit breaker according to claim 1, wherein the power supply connection portion includes a switching knob to which the connection terminal is attached, and the display means is a separate composition from the connection terminal and the switching knob. It is made of resin and is arranged on the upper part of the power supply connecting part storage part.

そして、この構成では、電源接続部の接続端子及び切替つまみとは別体の合成樹脂にて形成した表示手段により、表示が行われる。 And in this structure, a display is performed by the display means formed with the synthetic resin separate from the connection terminal and switching knob of a power supply connection part.

請求項３記載の回路遮断器は、請求項１または２記載の回路遮断器において、端子ドアは、上下方向を軸方向とする軸部を有する基部と、この基部から延設された側片部と、この側片部から突設された端片部とを備えるとともに、上下は開口するものである。 The circuit breaker according to claim 3 is the circuit breaker according to claim 1 or 2, wherein the terminal door has a base portion having a shaft portion whose axial direction is the vertical direction, and a side piece portion extending from the base portion. And an end piece projecting from the side piece, and the top and bottom are open.

そして、この構成では、端子ドアの構成が具体化される。 And in this structure, the structure of a terminal door is actualized.

請求項４記載の分電盤は、請求項１ないし３いずれか一記載の回路遮断器及びこの回路遮断器が接続される主幹漏電ブレーカを有するベースと；ベースの正面側に取り付けられるカバーと；を具備したものである。 A distribution board according to claim 4 is a base having a circuit breaker according to any one of claims 1 to 3 and a main circuit breaker to which the circuit breaker is connected; a cover attached to the front side of the base; Is provided.

そして、この構成では、請求項１ないし３いずれか一記載の回路遮断器を備えたため、請求項１ないし３いずれか一記載の作用を奏する分電盤が得られる。 And in this structure, since the circuit breaker as described in any one of Claims 1 thru | or 3 was provided, the distribution board which has an effect | action as described in any one of Claims 1 thru | or 3 is obtained.

請求項１記載の回路遮断器によれば、端子ドアを開いた状態で、接続端子を回動させることにより、接続端子の位置が容易に切り替えられ、例えば、電圧と相とが切り替えできる。また、端子ドアを閉じた状態で、端子ドアの回動が抑止され、接続端子の位置を固定できる。筐体を構成する天面部により、表示窓の部分を除いて電源接続部収納部の上部の全面を覆うことができる。 According to the circuit breaker of the first aspect, the position of the connection terminal can be easily switched by rotating the connection terminal while the terminal door is opened, for example, the voltage and the phase can be switched. Moreover, in the state which closed the terminal door, rotation of a terminal door is suppressed and the position of a connection terminal can be fixed. The top surface portion constituting the housing can cover the entire upper surface of the power supply connection portion storage portion except for the display window portion.

請求項２記載の回路遮断器によれば、請求項１記載の効果に加え、電源接続部の接続端子及び切替つまみとは別体の合成樹脂にて形成した表示手段により、表示を行うことができる。 According to the circuit breaker of the second aspect, in addition to the effect of the first aspect, the display can be performed by the display means formed of a synthetic resin separate from the connection terminal and the switching knob of the power connection portion. it can.

請求項３記載の回路遮断器によれば、請求項１または２記載の効果に加え、端子ドアの構成が具体化される。 According to the circuit breaker of the third aspect, in addition to the effect of the first or second aspect, the configuration of the terminal door is realized.

請求項４記載の分電盤によれば、請求項１ないし３いずれか一記載の回路遮断器を備えたため、請求項１または２記載の効果を奏する分電盤を得ることができる。 According to the distribution board according to claim 4, since the circuit breaker according to any one of claims 1 to 3 is provided, the distribution board having the effect according to claim 1 or 2 can be obtained.

以下、本発明の回路遮断器及び分電盤の一実施の形態を図面を参照して説明する。 Hereinafter, an embodiment of a circuit breaker and a distribution board according to the present invention will be described with reference to the drawings.

図１は、本発明の回路遮断器の一実施の形態を示す端子ドアを開いた状態の一部を拡大した後面図であり、図２は同上回路遮断器を取り付けた分電盤の説明図であり、(a)は扉を取り外した状態の正面図、(b)は扉を閉じた状態の側面図であり、図３は同上回路遮断器を示す断面図であり、図４は同上回路遮断器の平面図であり、(a)はオン状態、(b)はオフ状態であり、図５は同上回路遮断器の後面図であり、図６は同上回路遮断器の前面図であり、図７は同上回路遮断器の一部の底面図であり、図８は同上回路遮断器の一部の断面図であり、図９は同上回路遮断器の一部を拡大した断面図であり、図１０は同上回路遮断器の切替つまみの斜視図であり、図１１は同上回路遮断器の切替つまみの後面図であり、図１２は同上回路遮断器の切替つまみ及び接続端子を示す説明図であり、図１３は同上回路遮断器の一部を拡大した後面図であり、図１４は同上回路遮断器の端子板及び係止板を示す分解状態の断面図であり、図１５は同上回路遮断器の端子板及び係止板を示す組立状態の側面図であり、図１６は同上回路遮断器の係止板を示す前面図であり、図１７は同上回路遮断器の端子板及び係止板に電線を挿入した状態を示す説明図である。 FIG. 1 is a rear view in which a part of a state in which a terminal door is opened showing an embodiment of a circuit breaker of the present invention is enlarged, and FIG. 2 is an explanatory diagram of a distribution board to which the same circuit breaker is attached. (A) is a front view with the door removed, (b) is a side view with the door closed, FIG. 3 is a sectional view showing the circuit breaker, and FIG. It is a top view of a circuit breaker, (a) is an ON state, (b) is an OFF state, FIG. 5 is a rear view of the same circuit breaker, FIG. 6 is a front view of the same circuit breaker, 7 is a bottom view of a part of the same circuit breaker, FIG. 8 is a sectional view of a part of the same circuit breaker, FIG. 9 is an enlarged sectional view of a part of the same circuit breaker, 10 is a perspective view of a switching knob of the same circuit breaker, FIG. 11 is a rear view of the switching knob of the same circuit breaker, and FIG. 12 is a switching knob of the same circuit breaker. FIG. 13 is an enlarged rear view of a part of the same circuit breaker, and FIG. 14 is an exploded sectional view showing the terminal plate and the locking plate of the circuit breaker. 15 is a side view of the assembled state showing the terminal plate and the locking plate of the circuit breaker, FIG. 16 is a front view showing the locking plate of the circuit breaker, and FIG. 17 is the circuit breaker. It is explanatory drawing which shows the state which inserted the electric wire in the terminal board and locking plate of a container.

図２において、１は分電盤で、この分電盤１は、主に家庭や店舗などに設置されるもので、垂直な壁面などに設置されるベース２と、このベース２の正面側に取り付けられる枠状のカバー３と、このカバー３の正面側に開閉可能に取り付けられる扉４とを備えている。そして、この分電盤１の内側には、電源線に接続される図示しないリミッタが取り付けられるリミッタ取付部５と、このリミッタの２次側が接続される主幹漏電ブレーカ６と、この主幹漏電ブレーカ６の２次側が接続される複数の回路遮断器11となどが取り付けられ、収納されている。 In FIG. 2, reference numeral 1 denotes a distribution board. This distribution board 1 is mainly installed in a home or a store, and has a base 2 installed on a vertical wall surface and the front side of the base 2. A frame-shaped cover 3 to be attached, and a door 4 attached to the front side of the cover 3 so as to be openable and closable are provided. Inside the distribution board 1, a limiter mounting portion 5 to which a limiter (not shown) connected to the power supply line is mounted, a main earth leakage breaker 6 to which the secondary side of the limiter is connected, and the main earth leakage breaker 6 A plurality of circuit breakers 11 and the like to which the secondary side is connected are attached and stored.

また、分電盤１は、単相三線式で、主幹漏電ブレーカ６の２次側に接続されたブスバーとも呼ばれる給電体としての導電体である３本の板状の導電バーＮ，Ｌ1，Ｌ2を必要に応じて備えている。そして、これら導電バーＮ，Ｌ1，Ｌ2は、上下２列に並ぶ回路遮断器11の間に配置され、各回路遮断器11を、中性極の導電バーＮと一方の電圧極の導電バーＬ1とに接続し、あるいは、中性極の導電バーＮと他方の電圧極の導電バーＬ2とに接続することにより、１００Ｖとして利用され、また、両電圧極の導電バーＬ1と導電バーＬ2とに接続することにより、２００Ｖとして利用するようになっている。 In addition, the distribution board 1 is a single-phase three-wire system, and is composed of three plate-like conductive bars N, L1, L2 which are conductors as power feeders also called bus bars connected to the secondary side of the main earth leakage breaker 6. Is provided as necessary. The conductive bars N, L1, and L2 are arranged between the circuit breakers 11 arranged in two upper and lower rows, and each circuit breaker 11 is connected to the neutral conductive bar N and one of the voltage conductive bars L1. Or connected to the conductive bar N of the neutral electrode and the conductive bar L2 of the other voltage electrode to be used as 100V, and to the conductive bar L1 and the conductive bar L2 of both voltage electrodes. By connecting, it is used as 200V.

そして、各回路遮断器11は、プラグインブレーカ、プラグイン端子ブレーカ、分岐用回路遮断器などとも呼ばれる開閉器で、本実施の形態では、白色の薄形の筐体12を備えた薄形の分岐ブレーカを構成している。なお、回路遮断器11については、通常垂直な壁面に設置される分電盤に備えられるものであるが、以下の説明においては、筐体12を水平な平面上に載置した状態で説明し、図３における左側を前側とする。また、各図の端子の配置は、図１に、１００Ｖ時の状態を示し、図３に、２００Ｖ時の状態を示している。 Each circuit breaker 11 is a switch that is also called a plug-in breaker, a plug-in terminal breaker, a branch circuit breaker, etc., and in this embodiment, it is a thin type equipped with a white thin case 12. A branch breaker is configured. Note that the circuit breaker 11 is usually provided in a distribution board installed on a vertical wall surface, but in the following description, the case 12 is described in a state where it is placed on a horizontal plane. The left side in FIG. 3 is the front side. Moreover, the arrangement of the terminals in each figure shows the state at 100 V in FIG. 1, and the state at 200 V in FIG.

そして、この筐体12は、絶縁性を有する合成樹脂にて形成された一対のケース体13，14を組合せ、複数の本実施の形態では４個のリベットであるピン16で連結して薄箱状に形成されている。また、このケース体13，14の内側は、筐体12を構成する絶縁性を有する前後のセパレータ17，18により両側に区画されている。さらに、この筐体12は、底部の一部が裏蓋19で覆われ、また、側部の一部に開閉可能な端子ドア20が備えられている。 And this housing | casing 12 combines a pair of case bodies 13 and 14 formed with the synthetic resin which has insulation, and connects with the pin 16 which is four rivets in this Embodiment, and is a thin box It is formed in a shape. Further, the insides of the case bodies 13 and 14 are partitioned on both sides by front and rear separators 17 and 18 having insulating properties constituting the housing 12. Further, the casing 12 has a bottom part covered with a back cover 19, and a side door part provided with a terminal door 20 that can be opened and closed.

また、この筐体12には、一端部としての後側部に、電源接続部21が収納され、中央部に熱動式の回路遮断部22が収納されているとともに、他端部としての前側部に負荷接続部23が収納されている。そして、筐体12の後端部には、電源接続部21に臨み、上下に所定間隔で導電体接続口25，26，27が形成されている。また、筐体12の一側部の後端部には、導電体接続口25，26，27に連続して開口部28が形成され、この開口部28が端子ドア20で開閉可能に覆われている。さらに、筐体12の前端部には、円孔状の両側一対の電線挿入口29，29が形成されているとともに、これら電線挿入口29，29の下側に位置して、矩形状の検電用挿入口30，30が形成されている。 In addition, the housing 12 houses a power supply connection portion 21 at the rear side portion as one end portion, a thermal circuit breaker portion 22 at the center portion, and the front side as the other end portion. The load connecting portion 23 is housed in the portion. Conductor connection ports 25, 26, and 27 are formed at the rear end portion of the casing 12 so as to face the power supply connection portion 21 and at predetermined intervals in the vertical direction. Further, an opening 28 is formed at the rear end of one side of the housing 12 continuously to the conductor connection ports 25, 26, 27, and the opening 28 is covered with the terminal door 20 so as to be opened and closed. ing. Further, a pair of circular hole-shaped wire insertion ports 29, 29 are formed at the front end of the housing 12, and a rectangular inspection is located below the wire insertion ports 29, 29. Electric insertion ports 30 and 30 are formed.

また、筐体12には、下部の底面部32に、分電盤に係合して取り付けられる前後一対の取付部32aが形成されているとともに、前側の端部には、係合を保持するロックレバー32bが上下動可能に取り付けられている。そして、上部の天面部33には、電線接続用レバー取付部35、ハンドル取付部36、及び表示部取付部37が形成され、さらに、後面部には、各導電体接続口25，26，27同士の間に位置して、操作部取付部38が形成されている。また、筐体12の両側面は、略平面状に形成されている。なお、筐体12の天面部33には、必要に応じて銘板33a，33bが貼着されている。 The housing 12 has a pair of front and rear attachment portions 32a that are engaged with and attached to the distribution board on the bottom surface portion 32 of the lower portion, and the front end portion holds the engagement. A lock lever 32b is attached to be movable up and down. The upper top surface portion 33 is formed with an electric wire connecting lever mounting portion 35, a handle mounting portion 36, and a display portion mounting portion 37. Further, on the rear surface portion, each conductor connection port 25, 26, 27 is formed. An operation portion mounting portion 38 is formed between them. Further, both side surfaces of the housing 12 are formed in a substantially flat shape. Name plates 33a and 33b are attached to the top surface 33 of the housing 12 as necessary.

そして、回路遮断部22は、銅より線の配線であるジャンパ線40を介して電源接続部21に接続された過電流引外し手段を構成する一対のバイメタル板41と、これらバイメタル板41に対向する磁鉄片42と、これらバイメタル板41に銅より線の配線であるジャンパ線43を介して接続された可動接点板である一対のコンタクトアーム44と、これらコンタクトアーム44の先端部に固定された可動接点45と、負荷接続部23に接続され可動接点45に接離される固定接点46とを備えている。また、コンタクトアーム44は、基端部を支点として回動可能に支持され、かつ、付勢手段であり主スプリングと呼ばれるコイルスプリング48により、可動接点45が固定接点46から離間する方向に付勢されている。なお、各磁鉄片42の部分には、鉄枠49、磁鉄片ばね49a、支持枠49b、四角ナット49c、この四角ナット49cに螺合する調整ねじ49dなどが設けられている。 Then, the circuit breaker 22 is opposed to the bimetal plate 41 and a pair of bimetal plates 41 constituting an overcurrent tripping means connected to the power supply connection portion 21 via a jumper wire 40 that is a copper stranded wire. A pair of contact arms 44 that are movable contact plates connected to these bimetal plates 41 via jumper wires 43 that are copper stranded wires, and fixed to the tips of these contact arms 44. A movable contact 45 and a fixed contact 46 that is connected to the load connecting portion 23 and is contacted with and separated from the movable contact 45 are provided. Further, the contact arm 44 is supported so as to be rotatable about the base end portion, and is biased in a direction in which the movable contact 45 is separated from the fixed contact 46 by a coil spring 48 which is biasing means and is called a main spring. Has been. Each magnetic iron piece 42 is provided with an iron frame 49, a magnetic iron piece spring 49a, a support frame 49b, a square nut 49c, an adjustment screw 49d that is screwed into the square nut 49c, and the like.

また、回路遮断部22には、接点開閉機構51が設けられている。そして、この接点開閉機構51は、ハンドル取付部36に回動可能に取り付けられたスナップとも呼ばれるハンドル52、このハンドル52を回動可能に軸支する軸52a、このハンドル52を所定方向に付勢する付勢手段としての線ばねであるスナップスプリング53及び復帰スプリング54、ハンドル52に連結されたリンク軸である金属製の第１リンク55、この第１リンク55の移動方向を規制する引外し板である第２リンク56、第１リンク55に押動されてコンタクトアーム44を押動する可動枠である合成樹脂製の押動体57、第２リンク56の位置を規制する引外しレバーであるラッチ体58，59、ラッチ体58の軸58a、及びこのラッチ体58，59を所定方向に付勢する付勢手段としての線ばねである復帰スプリング60などを備えている。なお、ハンドル52の一面である前面には、オンを示す１を表示したラベル52bが貼着され、ハンドル52の他面である後面には、オフを示す０を表示したラベル52cが貼着されている。 Further, the circuit breaker 22 is provided with a contact opening / closing mechanism 51. The contact opening / closing mechanism 51 includes a handle 52 called a snap that is rotatably attached to the handle attachment portion 36, a shaft 52a that pivotally supports the handle 52, and biases the handle 52 in a predetermined direction. Snap springs 53 and return springs 54 that are wire springs as urging means to be operated, a metal first link 55 that is a link shaft connected to the handle 52, and a trip plate that restricts the moving direction of the first link 55 A second link 56, a synthetic resin pusher 57 that is a movable frame that is pushed by the first link 55 and pushes the contact arm 44, and a latch that is a trip lever that regulates the position of the second link 56. The body 58, 59, the shaft 58a of the latch body 58, and a return spring 60 that is a wire spring as a biasing means for biasing the latch bodies 58, 59 in a predetermined direction are provided. A label 52b indicating 1 indicating ON is attached to the front surface which is one surface of the handle 52, and a label 52c indicating 0 indicating OFF is attached to the rear surface which is the other surface of the handle 52. ing.

そこで、この回路遮断部22は、過電流が流れていない状態では、ラッチ体58，59に位置規制された第２リンク56により第１リンク55が押動体57を押動可能に案内され、ハンドル52を後方(図３に示す矢印Ａ方向)に回動することにより、第１リンク55が押動体57を下方に押動し、この押動体57がコンタクトアーム44を下方に押動して、コイルスプリング48の付勢力に抗して可動接点45を固定接点46に圧接し、回路が閉成された状態が維持される。 Therefore, in the state where no overcurrent flows, the circuit breaker 22 is guided by the second link 56 whose position is regulated by the latch bodies 58 and 59 so that the first link 55 can push the pusher 57, and the handle By rotating 52 backward (in the direction of arrow A shown in FIG. 3), the first link 55 pushes the pusher 57 downward, and the pusher 57 pushes the contact arm 44 downward. The movable contact 45 is pressed against the fixed contact 46 against the urging force of the coil spring 48, and the state where the circuit is closed is maintained.

一方、回路遮断部22は、過電流が流れると、バイメタル板41が湾曲し、ラッチ体58，59を移動させ、第２リンク56の位置の規制が解除される。すると、第１リンク55が押動体57から外れ、コイルスプリング48の付勢力により、可動接点45を固定接点46から引き外し、回路が遮断される。 On the other hand, when an overcurrent flows, the circuit breaker 22 bends the bimetal plate 41, moves the latch bodies 58 and 59, and the restriction on the position of the second link 56 is released. Then, the first link 55 is disengaged from the pusher 57, and the movable contact 45 is pulled away from the fixed contact 46 by the urging force of the coil spring 48, and the circuit is interrupted.

また、電源接続部21は、ケース体13，14あるいはセパレータ17，18に一体などに形成された区画板61により、他の部分から区画された電源接続部収納部64に収納されている。また、この電源接続部収納部64の一側部の開口部28は、端子ドア20により開閉される。この端子ドア20は、絶縁性を有する合成樹脂にて一体に形成され、上下の端部に軸部20a，20aを設けた基部20bと、この基部20bから延設された上下一対の側片部20c，20cと、これら側片部20c，20cの先端部から操作部取付部38，38側に連接するように突設された端片部20d，20dとを備えている。さらに、これら端片部20d，20dの先端部近傍からは、ほぼ基部20b側すなわち電源接続部収納部64の内側に向かって突設された板状の係止部20e，20eを備えている。そして、各係止部20e，20eは、先端部に向かって上下の寸法が小さくなり、上下の辺が、案内部を構成するドア側傾斜辺部20fとなっている。また、この端子ドア20の軸部20a，20aは、ケース体14に回動可能に、かつ、前後方向に若干移動可能に軸支されている。 Further, the power supply connection portion 21 is stored in a power supply connection portion storage portion 64 partitioned from other portions by a partition plate 61 formed integrally with the case bodies 13 and 14 or the separators 17 and 18. In addition, the opening 28 on one side of the power supply connecting portion storage portion 64 is opened and closed by the terminal door 20. The terminal door 20 is integrally formed of an insulating synthetic resin, and a base portion 20b having shaft portions 20a and 20a provided at upper and lower end portions, and a pair of upper and lower side piece portions extending from the base portion 20b. 20c, 20c, and end piece portions 20d, 20d projecting from the front end portions of these side piece portions 20c, 20c so as to be connected to the operation portion mounting portions 38, 38 side. Furthermore, plate-like locking portions 20e and 20e are provided so as to protrude from the vicinity of the tip end portions of these end piece portions 20d and 20d substantially toward the base portion 20b side, that is, the inside of the power supply connection portion storage portion 64. And each latching | locking part 20e, 20e becomes small in the vertical dimension toward the front-end | tip part, and the upper and lower sides are the door side inclination side part 20f which comprises a guide part. The shaft portions 20a, 20a of the terminal door 20 are pivotally supported by the case body 14 so as to be rotatable and slightly movable in the front-rear direction.

さらに、この電源接続部収納部64の上部には、表示窓65が形成されている。この表示窓65は、矩形状の通孔と、この通孔の下方に所定の間隔を介して配置されたケース体13と一体の底板とを備えている。そこで、この表示窓65は、他の部材が通孔と底板との間に位置しない状態では、底板が目視されケース体13，14と同色の白色となる。 Further, a display window 65 is formed in the upper part of the power supply connection portion storage portion 64. The display window 65 includes a rectangular through hole, and a bottom plate integrated with the case body 13 disposed below the through hole with a predetermined interval. Therefore, the display window 65 is white in the same color as the case bodies 13 and 14 when the other member is not positioned between the through hole and the bottom plate and the bottom plate is visually observed.

そして、電源接続部収納部64には、区画板61と操作部取付部38，38との間に位置し、約１８０度だけ回動可能に軸支された上下一対の切替つまみ66，66が配置されている。そして、各切替つまみ66は、絶縁性を有する合成樹脂などにて形成され、絶縁部材とも呼びうるもので、図１０ないし図１３などに示すように、円盤の一部を切り欠いた形状をなす基部67と、この基部67から前側に突設された前軸部68と、基部67から後側に突設された円柱状の後軸部69とを備え、これら前軸部68及び後軸部69が切替つまみ66の回転軸となっている。なお、以下、この回転軸から離間する方向を外方向として説明する。そして、前軸部68は、スペーサ71を介して区画板61側に回動可能に軸支され、後軸部69は、操作部取付部38に形成された円孔72に回動可能に軸支されている。また、この後軸部69には、円孔72を介して外部に露出する工具受部すなわちプラスドライバ用の溝が形成されている。そして、各切替つまみ66の基部67には、円筒面状をなす外周部すなわち基部67の長手方向の両端部から、この長手方向に沿って、断面半円状をなすダボである位置決め部73が突設されている。なお、この位置決め部73は、基部67の長手方向の両端部、すなわち基部67の幅方向の中央部に設ける他、回転方向に、例えば前側から見て反時計方向に５度未満でずらすこともできる。 The power connection section storage section 64 has a pair of upper and lower switching knobs 66 and 66 that are positioned between the partition plate 61 and the operation section mounting sections 38 and 38 and are pivotally supported by about 180 degrees. Has been placed. Each switching knob 66 is formed of an insulating synthetic resin or the like, and can also be called an insulating member. As shown in FIGS. A base 67, a front shaft 68 projecting forward from the base 67, and a columnar rear shaft 69 projecting rearward from the base 67, the front shaft 68 and the rear shaft 69 is the rotation axis of the switching knob 66. Hereinafter, the direction away from the rotating shaft will be described as the outward direction. The front shaft portion 68 is pivotally supported on the partition plate 61 side via a spacer 71, and the rear shaft portion 69 is pivotally supported in a circular hole 72 formed in the operation portion mounting portion 38. It is supported. Further, the rear shaft portion 69 is formed with a tool receiving portion exposed to the outside through the circular hole 72, that is, a groove for a plus driver. The base portion 67 of each switching knob 66 has a positioning portion 73 that is a dowel having a semicircular cross section along the longitudinal direction from the outer peripheral portion having a cylindrical surface shape, that is, from both ends in the longitudinal direction of the base portion 67. Projected. The positioning portion 73 is provided at both ends in the longitudinal direction of the base portion 67, that is, at the center portion in the width direction of the base portion 67, and may be shifted by less than 5 degrees in the rotational direction, for example, counterclockwise when viewed from the front side. it can.

また、基部67の長手方向の両端部近傍からは、後側に向かい、外周側の面を傾斜面とする断面三角状をなす係止受部74が突設されている。さらに、基部67の長手方向の両端部近傍からは、後側及び一側方に向かい、略角柱状をなす突起部75が突設されている。そして、この突起部75には、それぞれ平面状をなす規制部75a、案内部を構成する導電体用案内部75b、及び案内部を構成するドア用案内部75cが設けられている。そして、規制部75aは、基部67から後側方に突出して位置し、垂直すなわち切替つまみ66の回転軸と直交する方向を面方向として配置されている。また、導電体用案内部75bは、後側部すなわち規制部75aから、前側外方に向かい傾斜する傾斜面として形成されている。さらに、ドア用案内部75cは、基部67の外周面から、外周側に向かう傾斜面として形成されている。 Further, from both ends of the base portion 67 in the longitudinal direction, a locking receiving portion 74 having a triangular cross-section is provided so as to extend rearward and have an outer peripheral surface as an inclined surface. Further, from the vicinity of both end portions in the longitudinal direction of the base portion 67, protruding portions 75 having a substantially prismatic shape project from the rear side and one side. The projecting portion 75 is provided with a regulation portion 75a having a planar shape, a conductor guide portion 75b constituting the guide portion, and a door guide portion 75c constituting the guide portion. The restricting portion 75a is positioned so as to protrude rearward from the base portion 67, and is arranged with the surface direction being vertical, that is, a direction orthogonal to the rotation axis of the switching knob 66. Further, the conductor guide portion 75b is formed as an inclined surface that inclines from the rear side, that is, the restricting portion 75a toward the front outer side. Further, the door guide portion 75c is formed as an inclined surface from the outer peripheral surface of the base portion 67 toward the outer peripheral side.

さらに、各切替つまみ66には、それぞれ突起部75の間に位置して、接続端子77が取り付けられている。この接続端子77は、ＰＩＲ端子とも呼ばれるもので、弾性変形可能かつ導電性を有する金属板を折曲などして、相対向する一対の接触部78が形成され、それぞれジャンパ線40を介して回路遮断部22の異なるバイメタル板41に接続されている。また、図１２に示すように、この接続端子77を切替つまみ66に取り付けた状態で、切替つまみ66の突起部75の規制部75aは、接続端子77の接触部78の後側の先端部78aよりも後側すなわち導電バーＮ，Ｌ1，Ｌ2が挿入される側に突出して位置するようになっている。 Further, each switching knob 66 is provided with a connection terminal 77 positioned between the protrusions 75. The connection terminal 77 is also called a PIR terminal, and a pair of contact portions 78 facing each other is formed by bending an elastically deformable and conductive metal plate, and each circuit is connected via a jumper wire 40. It is connected to different bimetal plates 41 of the blocking part 22. In addition, as shown in FIG. 12, in a state where the connection terminal 77 is attached to the switching knob 66, the restricting portion 75a of the protrusion 75 of the switching knob 66 is a front end portion 78a on the rear side of the contact portion 78 of the connection terminal 77. Further, it is positioned so as to protrude to the rear side, that is, the side where the conductive bars N, L1, and L2 are inserted.

また、電源接続部収納部64には、各切替つまみ66の位置決め部73に係脱可能に係合して切替つまみ66を所定の位置に位置決めする位置決め受部80が設けられている。そして、各位置決め受部80は、一側のケース体13の内面側に一体に形成され、上下一対の突部80aと、これら突部80a同士の間に相対的に凹設された凹部80bとを備えている。また、各突部80aは、半円状の突部とこの突部から凹部80b側に向かって所定の長さで延びる突部とを備えている。すなわち、凹部80bから、各突部80aの外側の端部までは、所定の長さを有する余裕として構成されている。 In addition, the power supply connection portion storage portion 64 is provided with a positioning receiving portion 80 that removably engages with the positioning portion 73 of each switching knob 66 to position the switching knob 66 at a predetermined position. Each positioning receiving portion 80 is integrally formed on the inner surface side of the case body 13 on one side, a pair of upper and lower protrusions 80a, and a recess 80b that is relatively recessed between the protrusions 80a. It has. Each protrusion 80a includes a semicircular protrusion and a protrusion extending from the protrusion toward the recess 80b with a predetermined length. That is, from the recess 80b to the outer end of each protrusion 80a is configured as a margin having a predetermined length.

そして、端子ドア20を開いた状態で、プラスドライバなどの工具を用いて各切替つまみ66を回動することにより、各接触部78がいずれかの導電体接続口25，26，27に対向する。すなわち、上側の切替つまみ66の接続端子77の接触部78は、中性極の導電バーＮが挿入される導電体接続口25または一方の電圧極の導電バーＬ1が挿入される導電体接続口26に配置され、下側の切替つまみ66の接続端子77の接触部78は、一方の電圧極の導電バーＬ1が挿入される導電体接続口26または他方の電圧極の導電バーＬ2が導電体接続口27に配置され、それぞれ切替つまみ66の位置決め部73が位置決め受部80の凹部80bに係合して所定の位置に位置決めして保持される。さらに、この状態で、端子ドア20を閉じて前方に移動させることにより、端子ドア20の係止部20eが切替つまみ66の係止受部74に係合して、切替つまみ66の回動が抑止され、切替つまみ66すなわち接続端子77の位置が固定される。 Then, in a state where the terminal door 20 is opened, each contact portion 78 faces one of the conductor connection ports 25, 26, 27 by rotating each switching knob 66 using a tool such as a Phillips screwdriver. . That is, the contact portion 78 of the connection terminal 77 of the upper switching knob 66 is connected to the conductor connection port 25 into which the neutral electrode conductive bar N is inserted or the conductor connection port into which the one voltage electrode conductive bar L1 is inserted. 26, the contact portion 78 of the connection terminal 77 of the lower switching knob 66 is connected to the conductor connection port 26 into which the conductive bar L1 of one voltage electrode is inserted or the conductive bar L2 of the other voltage electrode is a conductor. The positioning portions 73 of the switching knobs 66 are arranged at the connection ports 27 and engage with the concave portions 80b of the positioning receiving portions 80 to be positioned and held at predetermined positions. Further, in this state, by closing the terminal door 20 and moving it forward, the locking portion 20e of the terminal door 20 is engaged with the locking receiving portion 74 of the switching knob 66, and the switching knob 66 is rotated. The position of the switching knob 66, that is, the connection terminal 77 is fixed.

そして、この状態で、すなわち所定の位置に接続端子77を位置させた状態で、取付部32aを係合し回路遮断器11をスライドさせて分電盤１に取り付けると、導電バーＮ，Ｌ1，Ｌ2が導電体接続口25，26，27からそれぞれ相対的に挿入され、これら導電バーＮ，Ｌ1，Ｌ2が接触部78で弾性的に挟持され、電気的に接続される。 In this state, that is, with the connection terminal 77 positioned at a predetermined position, when the attachment portion 32a is engaged and the circuit breaker 11 is slid and attached to the distribution board 1, the conductive bars N, L1, L2 is inserted relatively from the conductor connection ports 25, 26, and 27, and the conductive bars N, L1, and L2 are elastically sandwiched by the contact portion 78 and electrically connected.

また、接続端子77が所定の位置からずれた切替の中間状態では、このずれた状態を作業者が容易に確認でき、機械的あるいは電気的な不完全な接続を回避し、すなわち、回路遮断器11の分電盤１への機械的な接続あるいは導電バーＮ，Ｌ1，Ｌ2と接続端子77との電気的な接続を回避し、また、自動的に接続端子77を所定の位置に位置させる構成が備えられている。 Further, in the intermediate state of switching in which the connection terminal 77 is shifted from the predetermined position, the operator can easily confirm this shifted state, avoiding incomplete mechanical or electrical connection, that is, a circuit breaker. 11 mechanical connection to the distribution board 1 or electrical connection between the conductive bars N, L1, L2 and the connection terminal 77 is avoided, and the connection terminal 77 is automatically positioned at a predetermined position. Is provided.

まず、位置決め部73が位置決め受部80に正しく係合せず、接続端子77が所定の位置から大きくずれた状態では、端子ドア20を閉じようとした際に、この端子ドア20の係止部20eが切替つまみ66の規制部75aに当接し、端子ドア20が閉まらず、少なくとも係止部20eが係止受部74に係合する状態にはならない。そこで、接続端子77の位置がずれた状態を作業者が容易に確認できるとともに、分電盤１に取り付けた状態では、隣接する回路遮断器11などに端子ドア20が当接し、回路遮断器11の取り付けが回避される。 First, when the positioning portion 73 is not correctly engaged with the positioning receiving portion 80 and the connection terminal 77 is greatly deviated from a predetermined position, when the terminal door 20 is to be closed, the locking portion 20e of the terminal door 20 is closed. Is in contact with the restricting portion 75a of the switching knob 66, the terminal door 20 is not closed, and at least the locking portion 20e is not engaged with the locking receiving portion 74. Therefore, the operator can easily confirm the state in which the position of the connection terminal 77 is displaced, and when attached to the distribution board 1, the terminal door 20 comes into contact with the adjacent circuit breaker 11 and the circuit breaker 11 Installation is avoided.

また、接続端子77が所定の位置から大きくずれた状態では、図１３に示すように、導電体接続口25，26，27から挿入された導電バーＮ，Ｌ1，Ｌ2は切替つまみ66の規制部75aに当接し、接続端子77に接触することがない。そこで、接続端子77の位置がずれた状態を作業者が容易に確認できるとともに、接続端子77の変形や不完全な電気的接続が回避される。 When the connection terminal 77 is largely deviated from the predetermined position, the conductive bars N, L1, and L2 inserted from the conductor connection ports 25, 26, and 27 are restricted by the restricting portion of the switching knob 66 as shown in FIG. It abuts against 75a and does not contact the connection terminal 77. Therefore, the operator can easily confirm the state where the position of the connection terminal 77 is shifted, and deformation of the connection terminal 77 and incomplete electrical connection can be avoided.

一方、接続端子77が所定の位置から若干ずれた状態では、端子ドア20を閉じようとした際に、この端子ドア20の係止部20eが切替つまみ66のドア用案内部75cに摺接し、切替つまみ66を回転させ、接続端子77を所定の位置に移動させることができる。 On the other hand, in a state where the connection terminal 77 is slightly deviated from the predetermined position, when the terminal door 20 is to be closed, the locking portion 20e of the terminal door 20 comes into sliding contact with the door guide portion 75c of the switching knob 66, The connection knob 77 can be moved to a predetermined position by rotating the switching knob 66.

また、接続端子77が所定の位置から若干ずれた状態では、導電体接続口25，26，27から挿入された導電バーＮ，Ｌ1，Ｌ2は切替つまみ66の導電体用案内部75bに摺接し、切替つまみ66を回転させ、接続端子77を所定の位置に移動させることができる。 When the connection terminal 77 is slightly deviated from the predetermined position, the conductive bars N, L1, L2 inserted from the conductor connection ports 25, 26, 27 are in sliding contact with the conductor guide portion 75b of the switching knob 66. The switch knob 66 can be rotated to move the connection terminal 77 to a predetermined position.

また、電源接続部収納部64内の上端部には、表示駒である表示手段81が配置されている。そして、この表示手段81は、例えば赤色の合成樹脂にて形成され、前後方向を軸方向としてケース体13に回動可能に軸支された軸部82と、この軸部82から径方向に突設された表示部83及び作用部84を備えている。また、この表示手段81には、付勢手段としての線ばねである表示駒スプリング86が装着されている。そこで、作用部84に力が加わっていない状態では、表示部83が表示窓65に臨み、すなわち、表示部83が表示窓65の通孔と底板との間に入り込み、この表示部83が外部から赤く見えるようになっている。そして、上側の切替つまみ66の接続端子77が上側に回動して中性極の導電バーＮが挿入される導電体接続口25に臨む位置に存在する場合は、接続端子77が表示駒スプリング86の付勢力に抗して作用部84を押動し、表示部83が表示窓65から外れ、表示部83が外部から白く見えるようになっている。 In addition, a display means 81 that is a display piece is disposed at the upper end portion in the power supply connection portion storage portion 64. The display means 81 is formed of, for example, a red synthetic resin, and has a shaft portion 82 that is pivotally supported by the case body 13 with the front-rear direction as an axial direction, and projects from the shaft portion 82 in the radial direction. A display unit 83 and an action unit 84 are provided. The display means 81 is provided with a display piece spring 86 which is a wire spring as an urging means. Therefore, in a state where no force is applied to the action part 84, the display part 83 faces the display window 65, that is, the display part 83 enters between the through hole of the display window 65 and the bottom plate. It looks like red. When the connection terminal 77 of the upper switching knob 66 is pivoted upward and faces the conductor connection port 25 into which the neutral conductive bar N is inserted, the connection terminal 77 is connected to the display piece spring. The action part 84 is pushed against the urging force of 86, the display part 83 comes off from the display window 65, and the display part 83 looks white from the outside.

ここで、電源接続部21の１００Ｖ(１１０Ｖ)と２００Ｖ(２２０Ｖ)との切り替え動作を説明する。 Here, the switching operation between 100 V (110 V) and 200 V (220 V) of the power supply connection unit 21 will be described.

まず、１００Ｖの接続状態は、上端の中性極の導電バーＮを必ず利用するとともに、いずれかの導電バーＬ1，Ｌ2を利用して実現される。すなわち、上側の切替つまみ66の接続端子77は上側に回動され、下側の切替つまみ66の接続端子77は上下いずれかに回動される。このとき、表示部83が外部から白く見える。 First, the connection state of 100 V is realized by always using the conductive bar N at the neutral electrode at the upper end and using one of the conductive bars L1 and L2. That is, the connection terminal 77 of the upper switching knob 66 is rotated upward, and the connection terminal 77 of the lower switching knob 66 is rotated either up or down. At this time, the display unit 83 looks white from the outside.

一方、２００Ｖの接続状態は、中央の導電バーＬ1と下端の導電バーＬ2とを利用して実現される。すなわち、図１に示すように、上下側の切替つまみ66の接続端子77はいずれも下方に回動される。このとき、表示部83が外部から赤く見える。 On the other hand, the connection state of 200 V is realized by using the central conductive bar L1 and the lower conductive bar L2. That is, as shown in FIG. 1, all the connection terminals 77 of the upper and lower switching knobs 66 are rotated downward. At this time, the display unit 83 looks red from the outside.

一方、負荷接続部23は、ねじなし端子を構成し、ＳＬ端子部とも呼ばれるもので、筐体12に固定された導電性を有する固定接点板である一対の端子板101と、弾性変形可能な金属製でありＳＬ端子ばねとも呼ばれる一対の係止板102と、絶縁性を有する合成樹脂製の一対のハンドルであるレバー103となどを備えている。なお、これらレバー103は、互いに異なる色に着色されている。そして、各端子板101は、各電線挿入口29の軸方向に沿って配置された電線接続部105を備えている。さらに、この電線接続部105には、下面側に突出し、後側に角部を設けた鎖状接続部105aが設けられている。そして、この電線接続部105から延設された接点支持部106に、固定接点46が固着されている。また、各端子板101には、電線接続部105から屈曲して延設された検電部を兼ねたガイド部108が設けられ、電線接続部105とガイド部108とが筐体12に設けたリブ111，112に直接あるいは間接に当接して、がたつくことなく保持されている。また、ガイド部108は、筐体12に設けた検電用挿入口30に対向し、この検電用挿入口30から挿入された工具が当接して検電できるようになっている。 On the other hand, the load connecting portion 23 constitutes a screwless terminal and is also referred to as an SL terminal portion. The load connecting portion 23 is elastically deformable with a pair of terminal plates 101, which are conductive fixed contact plates fixed to the housing 12. It includes a pair of locking plates 102 made of metal and also called an SL terminal spring, and a lever 103 that is a pair of insulating synthetic resin handles. The levers 103 are colored in different colors. Each terminal board 101 includes an electric wire connecting portion 105 disposed along the axial direction of each electric wire insertion port 29. Further, the electric wire connection portion 105 is provided with a chain connection portion 105a that protrudes on the lower surface side and has a corner portion on the rear side. A fixed contact 46 is fixed to a contact support portion 106 extended from the electric wire connection portion 105. In addition, each terminal plate 101 is provided with a guide portion 108 that also serves as a voltage detection portion that is bent and extended from the wire connection portion 105, and the wire connection portion 105 and the guide portion 108 are provided in the housing 12. The ribs 111 and 112 are directly or indirectly abutted and held without rattling. Further, the guide portion 108 faces the voltage detection insertion port 30 provided in the housing 12, and a tool inserted from the voltage detection insertion port 30 comes into contact with the voltage detection device.

また、係止板102は、端子板101の電線接続部105とリブ111との間に挟持される基部116と、この基部116から延設され約２７０°弧状に屈曲された屈曲部117と、この屈曲部117の先端部に設けられた矩形孔状の電線係止部118とを備えている。さらに、電線係止部118の下端の縁部には、他の部分より厚さ寸法が小さく形成された鎖状接続部118aが形成されている。そして、この電線係止部118内に端子板101の電線接続部105が挿通するように配置され、係止板102の復帰変形する付勢力により、電線係止部118の縁部が電線接続部105に圧接されている。 The locking plate 102 includes a base 116 that is sandwiched between the wire connecting portion 105 of the terminal plate 101 and the rib 111, a bent portion 117 that extends from the base 116 and is bent in an arc shape of about 270 °, A rectangular hole-shaped wire locking portion 118 provided at the tip of the bent portion 117 is provided. Further, a chain connection part 118a having a thickness dimension smaller than that of the other part is formed at the lower edge of the wire locking part 118. Then, the wire connecting portion 105 of the terminal plate 101 is disposed so as to be inserted into the electric wire engaging portion 118, and the edge of the electric wire engaging portion 118 is made to be the electric wire connecting portion by the urging force of the locking plate 102 to return and deform. It is in pressure contact with 105.

さらに、レバー103は、筐体12の電線接続用レバー取付部35に回動可能に支持される軸部121と、この軸部121から一方に延設されたレバー操作部122と、軸部121からレバー操作部122の略反対側に延設された作用部123とを備えている。 Further, the lever 103 includes a shaft portion 121 that is rotatably supported by the wire connection lever mounting portion 35 of the housing 12, a lever operation portion 122 that extends from the shaft portion 121, and a shaft portion 121. And an action part 123 extending substantially opposite to the lever operation part 122.

そこで、この負荷接続部23は、レバー操作部122を上方に引き上げることにより、作用部123が屈曲部117を下方に押動し、係止板102の電線係止部118が電線接続部105の下面に沿った電線挿入口29に対向して開口する。そして、この状態で、負荷側の電線Ｗを電線挿入口29を介して電線係止部118内に挿入する。次いで、レバー操作部122を前側下方におろすことにより、係止板102が復帰変形し、電線係止部118の縁部が挿入された電線Ｗを端子板101の電線接続部105に圧接させ、電線Ｗを端子板101に電気的に接続するとともに、機械的に抜け止めする。さらに、この状態で、端子板101の鎖状接続部105aと係止板102の鎖状接続部118aとが電線Ｗに食い込むように当接し、電線Ｗを強固に抜け止めする。一方、再度レバー操作部122を引き上げることにより、容易に電線Ｗを取り外せるようになっている。 Therefore, in the load connecting portion 23, the lever operating portion 122 is pulled upward, so that the action portion 123 pushes the bent portion 117 downward, and the wire locking portion 118 of the locking plate 102 is connected to the wire connecting portion 105. It opens opposite to the wire insertion opening 29 along the lower surface. In this state, the load-side electric wire W is inserted into the electric wire locking portion 118 through the electric wire insertion port 29. Next, by lowering the lever operation portion 122 to the lower front side, the locking plate 102 is restored and deformed, and the electric wire W into which the edge portion of the electric wire locking portion 118 is inserted is brought into pressure contact with the electric wire connection portion 105 of the terminal plate 101, The electric wire W is electrically connected to the terminal plate 101 and is mechanically prevented from coming off. Further, in this state, the chain connection portion 105a of the terminal plate 101 and the chain connection portion 118a of the locking plate 102 come into contact with each other so as to bite into the electric wire W, thereby firmly preventing the electric wire W from coming off. On the other hand, the electric wire W can be easily removed by pulling up the lever operation unit 122 again.

このように、本実施の形態によれば、電源接続部21に、それぞれ選択端子である接続端子77を備えた２個の切替つまみ66を設け、いわば２軸の切替手段である回転切替手段を備えたため、この回転操作により分電盤１の導電バーＮ，Ｌ1，Ｌ2を適宜組み合わせて選択接続でき、電圧切替、相切替を容易に行うことができる。 As described above, according to the present embodiment, the power supply connection portion 21 is provided with the two switching knobs 66 each having the connection terminal 77 serving as the selection terminal, so that the rotation switching means serving as the two-axis switching means is provided. Because of this, by this rotation operation, the conductive bars N, L1, L2 of the distribution board 1 can be selected and connected in appropriate combinations, and voltage switching and phase switching can be easily performed.

さらに、電源側の回転切替構造である電源接続部21の接続端子77を支持する切替つまみ66に、規制部75a、導電体用案内部75b、及びドア用案内部75cを備えたため、突起部75を設けたため、接続端子77が所定の切替完了位置(正規位置)からずれた切替の中間状態では、このずれた状態を作業者が容易に確認でき、機械的あるいは電気的な不完全な接続を回避し、すなわち、回路遮断器11の分電盤１への機械的な接続あるいは導電バーＮ，Ｌ1，Ｌ2と接続端子77との不完全な電気的な接続や接続端子77の変形を回避し、あるいは、自動的に接続端子77を所定の位置に位置させることができる。 Further, since the switching knob 66 that supports the connection terminal 77 of the power supply connection portion 21 that is the rotation switching structure on the power supply side is provided with the restriction portion 75a, the conductor guide portion 75b, and the door guide portion 75c, the protrusion 75 Therefore, in the intermediate state of switching where the connection terminal 77 is deviated from the predetermined switching completion position (regular position), the operator can easily check this deviated state, and mechanical or electrical incomplete connection is made. To avoid the mechanical connection of the circuit breaker 11 to the distribution board 1 or the incomplete electrical connection between the conductive bars N, L1, L2 and the connection terminal 77 and the deformation of the connection terminal 77. Alternatively, the connection terminal 77 can be automatically positioned at a predetermined position.

すなわち、切替つまみ66に、接続端子77の側方に位置して、接続端子77の先端部78aより後方に突出する突起部75を設けたため、接続端子77が正規の位置にない場合に無理やり回路遮断器11を分電盤１に取付ようとしても、突起部75の規制部75aが導電バーＮ，Ｌ1，Ｌ2に当接し、接続端子77の変形を防止できる。 In other words, since the switching knob 66 is provided with a protrusion 75 that is located on the side of the connection terminal 77 and protrudes rearward from the tip 78a of the connection terminal 77, the circuit is forcibly applied when the connection terminal 77 is not in the proper position. Even if the circuit breaker 11 is to be attached to the distribution board 1, the restricting portion 75 a of the protrusion 75 abuts against the conductive bars N, L 1, L 2, and deformation of the connection terminal 77 can be prevented.

また、切替つまみ66の突起部75には、導電バーＮ，Ｌ1，Ｌ2の接続方向から離れるに従い所定の方向に傾斜する勾配を設定した導電体用案内部75bを設けたため、接続端子77が導電バーＮ，Ｌ1，Ｌ2に対して斜めに位置していたとしても、取り付け作業を継続することで、接続端子77を正規の位置に修正できる。 In addition, the protrusion 75 of the switching knob 66 is provided with a conductor guide 75b having a slope that is inclined in a predetermined direction as it is away from the connection direction of the conductive bars N, L1, and L2. Even if it is positioned obliquely with respect to the bars N, L1, and L2, the connection terminal 77 can be corrected to the proper position by continuing the mounting operation.

さらに、切替つまみ66に突起部75を設けたため、接続端子77が正規の位置にない場合に端子ドア20を閉じようとしても、この端子ドア20は突起部75に当接し、端子ドア20が閉まらず、接続端子77の位置がずれた状態を作業者が容易に確認できる。 Furthermore, since the projection 75 is provided on the switching knob 66, even if the terminal door 20 is closed when the connection terminal 77 is not in the proper position, the terminal door 20 abuts on the projection 75 and the terminal door 20 is not closed. Therefore, the operator can easily confirm the state where the position of the connection terminal 77 is shifted.

また、切替つまみ66の突起部75には傾斜面であるドア用案内部75cを設けるとともに、端子ドア20にも傾斜面であるドア側傾斜辺部20fを設けたため、端子ドア20を閉じることにより、接続端子77を正規の位置に修正できる。 In addition, the projection 75 of the switching knob 66 is provided with a door guide portion 75c that is an inclined surface, and the terminal door 20 is also provided with the door-side inclined side portion 20f that is an inclined surface. The connection terminal 77 can be corrected to the proper position.

また、切替つまみ66の外周面に位置決め部73を設け、筐体12のケース体13側に位置決め受部80を設けたため、切替つまみ66すなわち接続端子77を作業性良く正規の位置に位置決めできる。さらに、この位置決め受部80は、切替つまみ66の位置決め部73の回転軌跡に沿って所定の長さ寸法すなわち余裕を設定したため、位置決め部73が位置決め受部80の突部80aの縁部に当接して中立した中間状態では、切替つまみ66は正規位置よりある程度の角度を持って傾斜した状態となり、突起部75の規制部75aに導電バーＮ，Ｌ1，Ｌ2を確実に当接させ、取り付け動作を継続不可能として、接続端子77の変形などを防止することができる。 Further, since the positioning portion 73 is provided on the outer peripheral surface of the switching knob 66 and the positioning receiving portion 80 is provided on the case body 13 side of the housing 12, the switching knob 66, that is, the connection terminal 77 can be positioned at a proper position with good workability. Further, since this positioning receiving portion 80 has a predetermined length dimension, that is, a margin, is set along the rotation locus of the positioning portion 73 of the switching knob 66, the positioning portion 73 hits the edge of the protrusion 80a of the positioning receiving portion 80. In the intermediate state that is in contact and neutral, the switching knob 66 is inclined at a certain angle from the normal position, and the conductive bars N, L1, and L2 are securely brought into contact with the restricting portion 75a of the protruding portion 75 to perform the mounting operation. Therefore, the connection terminal 77 can be prevented from being deformed.

すなわち、本実施の形態の回路遮断器11は、複数の導電体接続口25，26，27及びこれら導電体接続口25，26，27に連続する開口部28を開閉する端子ドア20を設けた筐体12と；端子ドア20の内側に突設された係止部20eと；端子ドア20が開いた状態で筐体12に対して回動可能に設けられいずれかの導電体接続口25，26，27に選択的に臨みこの導電体接続口25，26，27に挿入された導電体に接続される接続端子77と、接続端子77とともに移動し、接続端子77がいずれかの導電体接続口25，26，27に臨む所定の位置にない状態で、端子ドア20の閉じる動作に伴い係止部20eが接して接続端子77を所定の位置に移動させる傾斜面であるドア用案内部75cとを備えた電源接続部21と；負荷に接続される負荷接続部23と；電源接続部21と負荷接続部23との間の回路を遮断可能に接続する回路遮断部22と；を具備したものである。そして、この構成では、端子ドア20を開いた状態で、接続端子77を回動させることにより、接続端子77の位置が容易に切り替えられ、例えば、電圧と相とが切り替えられる。また、接続端子77が導電体接続口25，26，27に臨む所定の位置にない状態で端子ドア20を閉じると、傾斜面であるドア用案内部75cに端子ドア20の内側に突設した係止部20eが接して接続端子77が所定の位置に移動し、接続端子77と導電体とが確実に接続される。 That is, the circuit breaker 11 according to the present embodiment is provided with a plurality of conductor connection ports 25, 26, and 27 and a terminal door 20 that opens and closes the opening 28 that is continuous with these conductor connection ports 25, 26, and 27. A housing 12; a locking portion 20e projecting from the inside of the terminal door 20; any of the conductor connection ports 25 provided so as to be rotatable with respect to the housing 12 in a state in which the terminal door 20 is open; Connected to the conductor inserted in the conductor connection ports 25, 26, 27 selectively moving to the conductor connection port 25, 26, 27, and moved together with the connection terminal 77, and the connection terminal 77 is connected to any conductor The door guide portion 75c, which is an inclined surface that is brought into contact with the locking portion 20e and moves the connection terminal 77 to a predetermined position when the terminal door 20 is closed without being in a predetermined position facing the ports 25, 26, and 27. A power connection part 21 comprising: a load connection part 23 connected to the load; a circuit between the power connection part 21 and the load connection part 23 is connected to be cut off It is obtained by including a; a circuit breaker unit 22. In this configuration, by rotating the connection terminal 77 with the terminal door 20 opened, the position of the connection terminal 77 can be easily switched, for example, voltage and phase can be switched. Further, when the terminal door 20 is closed in a state where the connection terminal 77 is not in a predetermined position facing the conductor connection ports 25, 26, 27, the door guide portion 75 c that is an inclined surface protrudes inside the terminal door 20. The locking portion 20e comes into contact with the connection terminal 77 and moves to a predetermined position, so that the connection terminal 77 and the conductor are securely connected.

また、本実施の形態の回路遮断器11は、電源接続部21は、接続端子77とともに移動する絶縁性を有する切替つまみ66を備え、切替つまみ66は、ドア用案内部75cと、接続端子77がいずれかの導電体接続口25，26，27に臨む所定の位置にない状態で、端子ドア20の係止部20eが当接し端子ドア20の閉じる動作を阻止する規制部75aとが設けられた突起部75を備えたものである。そして、この構成では、接続端子77が導電体接続口25，26，27に臨む所定の位置にないと、規制部75aにより端子ドア20が閉じないため、接続端子77が所定の位置にないことが容易に確認される。 Further, in the circuit breaker 11 of the present embodiment, the power supply connection portion 21 includes an insulating switching knob 66 that moves together with the connection terminal 77. The switching knob 66 includes the door guide portion 75c and the connection terminal 77. Is provided with a restricting portion 75a for preventing the closing operation of the terminal door 20 by contacting the locking portion 20e of the terminal door 20 without being in a predetermined position facing any of the conductor connection ports 25, 26, 27. The projection 75 is provided. In this configuration, since the terminal door 20 is not closed by the restricting portion 75a unless the connection terminal 77 is in a predetermined position facing the conductor connection ports 25, 26, and 27, the connection terminal 77 is not in the predetermined position. Is easily confirmed.

また、本実施の形態の回路遮断器11は、複数の導電体接続口25，26，27を設けた筐体12と；筐体12に対して回動可能に設けられいずれかの導電体接続口25，26，27に選択的に臨みこの導電体接続口25，26，27に挿入された導電体としての導電バーＮ，Ｌ1，Ｌ2に接続される導電性を有する接続端子77と、接続端子77とともに移動し、接続端子77がいずれかの導電体接続口25，26，27に臨む所定の位置にない状態で、導電体としての導電バーＮ，Ｌ1，Ｌ2の接続端子77への接触を阻止する規制部75aを設けた絶縁部材とを備えた電源接続部21と；負荷に接続される負荷接続部23と；電源接続部21と負荷接続部23との間の回路を遮断可能に接続する回路遮断部22と；を具備したものである。そして、この構成では、接続端子77を回動させることにより、接続端子77の位置が容易に切り替えられ、例えば、電圧と相とが切り替えられる。また、接続端子77が導電体接続口25，26，27に臨む所定の位置にないと、規制部75aにより導電体としての導電バーＮ，Ｌ1，Ｌ2が接続端子77に接触しないため、接続端子77が保護されるとともに接続端子77が所定の位置にないことが容易に確認される。 The circuit breaker 11 according to the present embodiment includes a housing 12 provided with a plurality of conductor connection ports 25, 26, and 27; and any conductor connection provided so as to be rotatable with respect to the housing 12. A connection terminal 77 having conductivity and connected to the conductive bars N, L1, L2 as conductors selectively inserted into the conductor connection ports 25, 26, 27. Contact with the connection terminal 77 of the conductive bars N, L1, and L2 as conductors in a state where the connection terminal 77 moves with the terminal 77 and is not in a predetermined position facing any of the conductor connection ports 25, 26, and 27 A power supply connection portion 21 provided with an insulating member provided with a regulating portion 75a that prevents the load; a load connection portion 23 connected to the load; a circuit between the power supply connection portion 21 and the load connection portion 23 can be cut off And a circuit breaker 22 to be connected. In this configuration, by rotating the connection terminal 77, the position of the connection terminal 77 is easily switched, for example, the voltage and the phase are switched. Further, if the connection terminal 77 is not in a predetermined position facing the conductor connection ports 25, 26, 27, the conductive bars N, L1, L2 as conductors do not contact the connection terminal 77 by the restricting portion 75a. It is easily confirmed that 77 is protected and the connection terminal 77 is not in place.

また、本実施の形態の回路遮断器11は、複数の導電体接続口25，26，27を設けた筐体12と；筐体12に対して回動可能に設けられいずれかの導電体接続口25，26，27に選択的に臨みこの導電体接続口25，26，27に挿入された導電体としての導電バーＮ，Ｌ1，Ｌ2に接続される導電性を有する接続端子77と、接続端子77とともに移動し、接続端子77がいずれかの導電体接続口25，26，27に臨む所定の位置にない状態で、導電体としての導電バーＮ，Ｌ1，Ｌ2を導電体接続口25，26，27に挿入する動作に伴い接続端子77を所定の位置に移動させる導電体用案内部75bを設けた絶縁部材としての切替つまみ66とを備えた電源接続部21と；負荷に接続される負荷接続部23と；電源接続部21と負荷接続部23との間の回路を遮断可能に接続する回路遮断部22と；を具備したものである。そして、この構成では、接続端子77を回動させることにより、接続端子77の位置が容易に切り替えられ、例えば、電圧と相とが切り替えられる。また、接続端子77が導電体接続口25，26，27に臨む所定の位置にない状態で導電体としての導電バーＮ，Ｌ1，Ｌ2を導電体接続口25，26，27に挿入すると、導電体用案内部75bにより接続端子77が所定の位置に移動し、接続端子77が保護されるとともに接続端子77と導電体としての導電バーＮ，Ｌ1，Ｌ2とが確実に接続される。 The circuit breaker 11 according to the present embodiment includes a housing 12 provided with a plurality of conductor connection ports 25, 26, and 27; and any conductor connection provided so as to be rotatable with respect to the housing 12. A connection terminal 77 having conductivity and connected to the conductive bars N, L1, L2 as conductors selectively inserted into the conductor connection ports 25, 26, 27. The conductor bars N, L1, and L2 as conductors are moved to the conductor connection port 25, with the connection terminal 77 being not in a predetermined position facing the conductor connection ports 25, 26, and 27. A power supply connection portion 21 including a switching knob 66 as an insulating member provided with a conductor guide portion 75b for moving the connection terminal 77 to a predetermined position in accordance with the operation of inserting into the terminals 26 and 27; A load connection unit 23; and a circuit cutoff unit 22 that connects the power source connection unit 21 and the load connection unit 23 so as to be cut off. . In this configuration, by rotating the connection terminal 77, the position of the connection terminal 77 is easily switched, for example, the voltage and the phase are switched. Further, when the conductive bars N, L1, L2 as conductors are inserted into the conductor connection ports 25, 26, 27 in a state where the connection terminal 77 is not in a predetermined position facing the conductor connection ports 25, 26, 27, the conductive The connection terminal 77 is moved to a predetermined position by the body guide portion 75b, so that the connection terminal 77 is protected and the connection terminal 77 and the conductive bars N, L1, L2 as conductors are securely connected.

なお、本実施の形態では、切替つまみ66すなわち接続端子77の位置がずれた状態で、端子ドア20を閉じないようにする手段、導電バーＮ，Ｌ1，Ｌ2を接続端子77に接触させない手段、端子ドア20を閉じる動作により接続端子77の位置を直す手段、及び導電バーＮ，Ｌ1，Ｌ2の挿入により接続端子77の位置を直す手段を設けたが、これら手段のうちの少なくとも一つを設けることにより、機械的あるいは電気的な不完全な接続を回避することができる。 In the present embodiment, means for preventing the terminal door 20 from closing when the position of the switching knob 66, that is, the connection terminal 77 is shifted, means for preventing the conductive bars N, L1, L2 from contacting the connection terminal 77, Means for correcting the position of the connection terminal 77 by the operation of closing the terminal door 20 and means for correcting the position of the connection terminal 77 by inserting the conductive bars N, L1, and L2 are provided. At least one of these means is provided. Thus, incomplete mechanical or electrical connection can be avoided.

また、筐体12の天面部33に設定すなわち選択電圧が見える表示を設け、中性極(Ｎ極)の導電バーＮが挿入される導電体接続口25に接続端子77が存在しない状態で、すなわち２００Ｖが選択されている状態で、天面部33の表示が白色から赤色になり、２００Ｖ電圧表示を行うようにしたため、選択電圧を、特に、２００Ｖを選択した状態を容易に確認でき、過電圧を負荷機器に印加することを抑制できる。 In addition, in the state where the setting surface, that is, the selection voltage can be seen, is provided on the top surface portion 33 of the housing 12, and there is no connection terminal 77 in the conductor connection port 25 into which the conductive bar N of the neutral electrode (N electrode) is inserted, In other words, the display of the top surface 33 changes from white to red when 200 V is selected, and the 200 V voltage is displayed. Therefore, it is possible to easily check the selected voltage, particularly the state where 200 V is selected, and the overvoltage. Application to the load device can be suppressed.

また、電源接続部21は、２個の切替つまみ66を設けて構成したため、１個の端子を上下にスライドさせる構成などに比べて、各部材も簡略な構成で部品点数の削減も可能であり、製造コストを低減できる。 In addition, since the power supply connecting portion 21 is provided with two switching knobs 66, each member can be simplified in configuration and the number of parts can be reduced compared to a configuration in which one terminal is slid up and down. Manufacturing cost can be reduced.

本発明は、例えば、家庭や店舗などに設置される単相三線式の分電盤に用いられる回路遮断器及び分電盤に関する。 The present invention relates to a circuit breaker and a distribution board used for, for example, a single-phase three-wire distribution board installed in a home or a store.

本発明の回路遮断器の一実施の形態を示す端子ドアを開いた状態の一部を拡大した後面図である。It is the rear view which expanded a part of the state which opened the terminal door which shows one Embodiment of the circuit breaker of this invention. 同上回路遮断器を取り付けた分電盤の説明図であり、(a)は扉を取り外した状態の正面図、(b)は扉を閉じた状態の側面図である。It is explanatory drawing of the distribution board which attached the circuit breaker same as the above, (a) is the front view of the state which removed the door, (b) is the side view of the state which closed the door. 同上回路遮断器を示す断面図である。It is sectional drawing which shows a circuit breaker same as the above. 同上回路遮断器の平面図であり、(a)はオン状態、(b)はオフ状態である。It is a top view of a circuit breaker same as the above, (a) is an ON state, (b) is an OFF state. 同上回路遮断器の後面図である。It is a rear view of a circuit breaker same as the above. 同上回路遮断器の前面図である。It is a front view of a circuit breaker same as the above. 同上回路遮断器の一部の底面図である。It is a bottom view of a part of the same circuit breaker. 同上回路遮断器の一部の断面図である。It is sectional drawing of a part of circuit breaker same as the above. 同上回路遮断器の一部を拡大した断面図である。It is sectional drawing which expanded a part of circuit breaker same as the above. 同上回路遮断器の切替つまみの斜視図である。It is a perspective view of the switching knob of a circuit breaker same as the above. 同上回路遮断器の切替つまみの後面図である。It is a rear view of the switching knob of a circuit breaker same as the above. 同上回路遮断器の切替つまみ及び接続端子を示す説明図である。It is explanatory drawing which shows the switching knob and connection terminal of a circuit breaker same as the above. 同上回路遮断器の一部を拡大した後面図である。It is a rear view which expanded a part of circuit breaker same as the above. 同上回路遮断器の端子板及び係止板を示す分解状態の断面図である。It is sectional drawing of the decomposition | disassembly state which shows the terminal board and locking plate of a circuit breaker same as the above. 同上回路遮断器の端子板及び係止板を示す組立状態の側面図である。It is a side view of the assembly state which shows the terminal board and locking plate of a circuit breaker same as the above. 同上回路遮断器の係止板を示す前面図である。It is a front view which shows the latching plate of a circuit breaker same as the above. 同上回路遮断器の端子板及び係止板に電線を挿入した状態を示す説明図である。It is explanatory drawing which shows the state which inserted the electric wire in the terminal board and locking plate of a circuit breaker same as the above.

Explanation of symbols

１分電盤
２ベース
３カバー
６主幹漏電ブレーカ
11 回路遮断器
12 筐体
20 端子ドア
20a 軸部
20b 基部
20c 側片部
20d 端片部
21 電源接続部
22 回路遮断部
23 負荷接続部
28 開口部
33 天面部
64 電源接続部収納部
65 表示窓
66 切替つまみ
77 接続端子
81 表示手段 1 Distribution board 2 Base 3 Cover 6 Main earth leakage breaker
11 Circuit breaker
12 housing
20 Terminal door
20a Shaft
20b base
20c side piece
20d end piece
21 Power connection
22 Circuit breaker
23 Load connection
28 opening
33 Top surface
64 Power connection compartment
65 Display window
66 selector knob
77 Connection terminal
81 Display means

Claims

Two power connections, each with a connection terminal;
A power supply connecting portion storing the power connecting portions so as to be rotatable about the front-rear direction as an axial direction;
An opening provided from one side portion to the end surface portion of the power connection portion storage portion;
A rotatable terminal door that opens and closes the opening, allows the power connection to rotate in the open state, and prevents the power connection from rotating in the closed state;
Having a display window, covering the entire surface of the upper part of the power supply connecting portion storing portion excluding the display window portion, and constituting a casing;
Display means housed in the power supply connection housing portion and displaying from the display window as the power supply connection portion rotates;
A load connection connected to the load;
A circuit breaker for connecting the power connection and the load connection so as to be cut off;
A circuit breaker comprising:

The power supply connection section has a switching knob with a connection terminal attached,
2. The circuit breaker according to claim 1, wherein the display means is formed of a synthetic resin separate from the connection terminal and the switching knob, and is arranged on the upper portion of the power supply connection portion storage portion.

The terminal door includes a base portion having a shaft portion whose axial direction is the vertical direction, a side piece portion extending from the base portion, and an end piece portion projecting from the side piece portion, and the upper and lower sides are open. The circuit breaker according to claim 1 or 2, wherein:

A base having a circuit breaker according to any one of claims 1 to 3 and a main circuit breaker to which the circuit breaker is connected;
A cover attached to the front side of the base;
A distribution board characterized by comprising: