JP2006191740A - Bus support for switchboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus support for a switchboard where the structure of a bus supporting member is reformed so that the curtailment of the number of used parts and the improvement of the work efficiency of maintenance inspection to be performed in the switchboard. <P>SOLUTION: This bus support supports insulated buses 2 for each phase (U, V and W phases ) of a main circuit that are arranged in parallel back and forth from this front side to the depth in its upper part in the switchboard. The beam-shaped resin-molded bus supporting member 6 has such a structure that bus attaching seats 6b for fastening phases of buses with bolts distributed on its downside, and interphase barriers 6c are made integrally. Besides, for the bus attaching seat 6b, its bus attaching seat face 6b-1 is made forward half downward so that a user can easily access it from front. The seat is erected back and forth on a supporting frame on the board side via the attaching seats 6d made at both ends in front and in rear of the supporting member, and then each phase of buses are laid from front on the seat faces of the bus attaching seats and fastened with fastening bolts 5, thereby being supported. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、配電盤（閉鎖配電盤）の盤内に配線した主回路母線を絶縁支持する母線支持装置に関する。   The present invention relates to a busbar support device for insulatingly supporting a main circuit busbar wired in a panel of a switchboard (closed switchboard).

頭記の母線支持装置として、Ｕ，Ｖ，Ｗ相の３相主回路母線の導体を個々に碍子に支持した上で、各相の碍子を碍子支持台に支持して盤内の支持フレームに取付けた構成のものが知られており（例えば、特許文献１参照）、その従来構造を図３，図４に示す。
図において、１は閉鎖配電盤、１ａは正面扉、２は配電盤１の盤内上部に配線した３相（Ｕ，Ｖ，Ｗ相）の主回路母線、２ａは各相の母線から分岐して盤内の機器に配線したフィーダ、３は母線２の支持碍子、４は盤内の天井近くに設置して盤側の支持フレームに固定した碍子支持台、５は母線２を碍子３に固定する締結ボルトである。
ここで、母線２は、配電盤１の正面から奥行き方向にＵ，Ｖ，Ｗ各相の母線導体が前後に平行して並び、各相の母線２は図４で示すように前後に並ぶ３個の碍子３を介して碍子支持台４に絶縁支持されている。
特開平８−２９８７０６号公報 As the bus support device described above, the conductors of the three-phase main circuit buses of the U, V, and W phases are individually supported by the insulator, and the insulators of each phase are supported by the insulator support base to the support frame in the panel. The thing of the attached structure is known (for example, refer patent document 1), and the conventional structure is shown in FIG. 3, FIG.
In the figure, 1 is a closed switchboard, 1a is a front door, 2 is a three-phase (U, V, W phase) main circuit bus wired to the upper part of the switchboard 1, and 2a is a board branched from each phase bus Feeder wired to the equipment inside, 3 is a support insulator for the bus 2, 4 is an insulator support base installed near the ceiling inside the board and fixed to the support frame on the board side, 5 is a fastening to fix the bus 2 to the insulator 3 It is a bolt.
Here, the bus bar 2 includes U, V, and W phase bus conductors arranged in parallel in the front-rear direction from the front of the switchboard 1, and each phase bus 2 is arranged in front and rear as shown in FIG. 4. The insulator support 4 is insulated and supported through the insulator 3.
JP-A-8-298706

前記した従来構成の母線支持装置では、各相の母線２に対応する３個の碍子３が前後に重なって一列に並び、かつ締結ボルト５は真下を向いて碍子３の下面に締結されている。
このために、配電盤の保守点検時に、盤内に立ち入った保守員が正面（矢印Ｐ）から母線２を碍子３に支持している締結ボルト６にアクセスして増し締め作業を行う場合に、正面から見てボルト５の締結箇所が目視点検し難く、特に盤内の奥側に配線されている相の母線はその前方に並ぶ他の相の母線２およびその分岐フィーダ２ａの導体が邪魔になってボルト５の増し締め作業がやり難くなるなどの問題があり、ユーザーからその改善策が要望されている。また、従来構造では３相の主回路母線２を支持するのに支持箇所ごとに３個の碍子３が必要となるため、母線支持装置の部品点数が多くなってコスト高となる。
本発明は上記の点に鑑みなされたものであり、盤内で行う保守点検の作業性向上と併せて，使用する部品点数の削減が図れるように母線支持部材の構造を改良した配電盤の母線支持装置を提供することを目的とする。 In the bus support device having the above-described conventional configuration, the three insulators 3 corresponding to the buses 2 of the respective phases overlap in front and rear and are arranged in a line, and the fastening bolts 5 are fastened to the lower surface of the insulator 3 facing downward. .
For this reason, when a maintenance person who has entered the panel accesses the fastening bolt 6 that supports the bus 2 on the insulator 3 from the front (arrow P) during the maintenance inspection of the switchboard, As a result, it is difficult to visually inspect the fastening part of the bolt 5, and in particular, the phase buses wired on the back side in the panel are obstructed by the buses 2 of the other phases arranged in front of them and the conductors of the branch feeders 2 a. Therefore, there is a problem that it is difficult to retighten the bolt 5, and the user has requested a countermeasure for the improvement. Further, in the conventional structure, three insulators 3 are required at each support location to support the three-phase main circuit bus 2, so that the number of parts of the bus support device increases and the cost increases.
The present invention has been made in view of the above points, and in addition to improving the workability of maintenance and inspection performed in the panel, the busbar support of the switchboard improved in the structure of the busbar support member so that the number of parts used can be reduced. An object is to provide an apparatus.

上記目的を達成するために、本発明によれば、配電盤の盤内上部に正面手前側から奥に向けて前後平行に並べて配線した主回路各相の母線を絶縁支持する母線支持装置であって、樹脂成形品になる梁状の母線支持部材がその下面側に分散して各相の母線をボルト締結する母線取付台座を備え、かつ母線取付台座は母線の取付座面が前方斜め下に向いており、該支持部材の前後両端に形成した取付座を介して盤側の支持フレームに架設するものとする（請求項１）。
また、前記構成の態様として、母線支持部材を、断面Ｈ形のフレームを基体として、その下面側に分散形成した母線取付台座の相互間に鍔状の相間バリヤーを形成した構成とする（請求項２）。 In order to achieve the above object, according to the present invention, there is provided a bus support device for insulatingly supporting the buses of each phase of the main circuit wired in parallel in the front-rear direction from the front front side to the back in the upper part of the switchboard panel. The beam-shaped bus bar supporting member to be a resin molded product has a bus bar mounting base that is dispersed on the lower surface side and bolts the bus bar of each phase, and the bus bar mounting base has the bus bar mounting seat surface facing diagonally forward and downward. It is constructed to be installed on a support frame on the panel side via mounting seats formed at both front and rear ends of the support member.
Further, as an aspect of the above configuration, the bus bar supporting member is configured such that a hook-like interphase barrier is formed between bus bar mounting bases dispersedly formed on the lower surface side of a frame having an H-shaped cross section as a base. 2).

上記の構成によれば、１本の母線支持部材に碍子を用いずに３相主回路の各相母線を一括して絶縁支持することができ、従来構造と比べて部品点数の削減，コストの低減が図れる。また、この母線支持装置を配電盤内に組み込んで母線を支持した状態では、母線のボルト締結箇所が全て斜め前方に向いていることから、配電盤の正面側から各相のボルト締結箇所を容易に目視確認できるとともに、保守点検時に盤内に立ち入って母線の締結ボルトを増し締めする場合でも、他の相の母線，フィーダ導体に邪魔されることなく前後列に並ぶ各相母線のボルト締結部へ前方から容易にアクセスして増し締め作業が行える。   According to the above configuration, each phase bus of the three-phase main circuit can be collectively insulated and supported without using an insulator for one bus support member. Reduction can be achieved. In addition, when the bus support device is incorporated in the switchboard and the busbar is supported, all the bolt fastening locations of the bus are facing diagonally forward, so the bolt fastening locations of each phase can be easily visually checked from the front side of the switchboard. In addition to being able to confirm, even when entering the panel during maintenance inspection and tightening the fastening bolts of the busbars further, the front of the bolted fastening part of each phase bus lined up in the front and rear rows without being obstructed by the busbars and feeder conductors of other phases It can be easily accessed from and can be retightened.

以下、本発明の実施の形態を図１，図２に示す実施例に基づいて説明する。なお、実施例の図中で図４に対応する部材には同じ符号を付してその説明は省略する。
図示実施例の構成においては、例えばエポシキ樹脂の成形品になる母線支持部材６の下面側に次記の母線取付台座を分散形成し、この母線取付台座に３相主回路の母線（Ｕ，Ｖ，Ｗ相）２が個々に締結ボルト５で固定支持されている。
ここで、母線支持部材６は断面Ｈ形のフレーム６ａを基体として、そのフレーム６ａの下面側には長手方向に分散して各相の母線２に対応する母線取付台座６ｂが一体成形されており、かつ各母線取付台座６ｂの相互間に鍔状の相間バリヤー６ｃを形成し、さらにフレーム６ａの前後両端には取付座６ｄを形成した構造になる。また、前記の母線取付台座６bは中空な角筒形で、その母線取付座面６ｂ−１が斜め前方を向くように形成されており、かつその母線取付座面には一端を開放したボルト挿入穴が形成されている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the examples shown in FIGS. In addition, in the figure of an Example, the same code | symbol is attached | subjected to the member corresponding to FIG. 4, and the description is abbreviate | omitted.
In the configuration of the illustrated embodiment, for example, the following bus bar mounting pedestals are dispersedly formed on the lower surface side of the bus bar supporting member 6 that is a molded product of epoxy resin, and the bus bars (U, V) of the three-phase main circuit are formed on this bus bar mounting base. , W phase) 2 are fixedly supported by fastening bolts 5 individually.
Here, the bus bar supporting member 6 has a frame 6a having an H-shaped cross section as a base, and a bus bar mounting base 6b corresponding to the bus bar 2 of each phase is integrally formed on the lower surface side of the frame 6a. In addition, a cage-like interphase barrier 6c is formed between the bus bar mounting bases 6b, and mounting seats 6d are formed at both front and rear ends of the frame 6a. The bus bar mounting base 6b has a hollow rectangular tube shape, the bus bar mounting seat surface 6b-1 is formed to face obliquely forward, and a bolt is inserted into the bus bar mounting seat surface with one end open. A hole is formed.

そして、母線支持部材６に各相の母線２を固定支持するには、母線支持部材６の前後両端に設けた取付座６ｄを配電盤の盤内に布設した支持フレーム（図示せず）にボルト締結して架設した上で、支持部材６の母線取付台座６ｂごとに斜め前方を向いた母線取付座面６ｂ−１に母線２の平角導体を重ね合わせて締結ボルト５で固定支持する。なお、このボルト締結作業では、角筒形の母線取付台座６ｂに平角状のネジ座板５ａを嵌め込んでおき、母線２の導体に挿通した締結ボルト５を台座６ｂのボルト挿入穴に前方から嵌入して前記ネジ座板５ａに螺合して締結する。
上記の母線支持構造によれば、１本の母線支持部材６で３相分の母線２（３本）を一括支持することができ、これにより図４の従来構造と比べて部品点数が少なくて済む。また、母線の支持状態では、母線相互間の絶縁に必要な沿面距離を鍔状の相間バリヤー６ｃにより確保することができる。また、この母線支持部材６を配電盤内の上部に組み付けた上で、その母線取付台座６ｂに母線２を締結ボルト５で固定した配線状態では、各相母線２のボルト締結箇所が全て斜め前方に向いていることから、配電盤の正面側から各相のボルト締結箇所を容易に目視確認できるとともに、保守点検時に盤内に立ち入って締結ボルト５を増し締めする場合でも、他相の母線２，フィーダ導体２ａに邪魔されることなく前後列に並ぶ各相母線のボルト締結部へ前方から容易にアクセスして増し締め作業を行うことができる。 In order to fix and support the bus 2 of each phase on the bus support member 6, bolts are fastened to a support frame (not shown) in which mounting seats 6d provided at both front and rear ends of the bus support member 6 are installed in the panel of the switchboard. Then, the rectangular conductor of the bus 2 is superposed on the bus mounting seat surface 6b-1 facing obliquely forward for each bus mounting base 6b of the support member 6 and fixedly supported by the fastening bolt 5. In this bolt fastening operation, a rectangular screw seat plate 5a is fitted into the rectangular tube bus bar mounting base 6b, and the fastening bolt 5 inserted into the conductor of the bus bar 2 is inserted into the bolt insertion hole of the base 6b from the front. The screw seat plate 5a is inserted and fastened.
According to the above busbar support structure, the busbars 2 (three) for three phases can be collectively supported by one busbar support member 6, thereby reducing the number of parts compared to the conventional structure of FIG. 4. That's it. Further, in the support state of the bus bars, the creepage distance necessary for insulation between the bus bars can be secured by the bowl-shaped interphase barrier 6c. Further, in a wiring state in which the bus bar supporting member 6 is assembled to the upper part in the switchboard and the bus bar 2 is fixed to the bus bar mounting base 6b with the fastening bolts 5, all bolt fastening points of the respective phase buses 2 are diagonally forward. Therefore, it is possible to easily visually check the bolt fastening location of each phase from the front side of the switchboard, and even when entering the panel and tightening the fastening bolt 5 at the time of maintenance, the other bus 2 feeder Retightening can be performed by easily accessing the bolt fastening portions of the phase buses arranged in the front and rear rows from the front without being obstructed by the conductor 2a.

なお、図示実施例では母線取付台座６ｂが四角形の角筒であるが、これに限定されるものではなく、例えば三角状の突起部であってもよい。   In the illustrated embodiment, the bus bar mounting base 6b is a rectangular square tube, but is not limited thereto, and may be, for example, a triangular protrusion.

本発明の実施例による母線支持装置に母線を支持した使用状態の俯瞰図The overhead view of the use condition which supported the bus-bar to the bus-bar support apparatus by the Example of this invention 図１における母線支持部材の外形斜視図External perspective view of busbar support member in FIG. 配電盤内に配線した主回路母線の従来における支持装置の略示図Schematic diagram of conventional support device for main circuit buses wired in switchboard 図３における母線支持装置の詳細構造を表す斜視図The perspective view showing the detailed structure of the bus-bar support apparatus in FIG.

符号の説明Explanation of symbols

１ 配電盤
２ 母線
５ 締結ボルト
６ 母線支持部材
６ａ フレーム
６ｂ 母線取付台座
６ｂ−１ 母線取付座面
６ｃ 相間バリヤー
６ｄ 取付座 1 Power Distribution Board 2 Busbar 5 Fastening Bolt 6 Busbar Support Member 6a Frame 6b Busbar Mounting Base
6b-1 Busbar mounting seat surface 6c Interphase barrier 6d Mounting seat

Claims (2)

配電盤の盤内上部に正面手前側から奥に向けて前後平行に並べて配線した主回路各相の母線を絶縁支持する母線支持装置であって、樹脂成形品になる梁状の母線支持部材がその下面側に分散して各相の母線をボルト締結する母線取付台座を備え、かつ母線取付台座は母線の取付座面が前方斜め下に向いており、該支持部材の前後両端に形成した取付座を介して盤側の支持フレームに架設したことを特徴とする配電盤の母線支持装置。 A bus support device that insulates and supports the buses of each phase of the main circuit that are wired in parallel in the front-rear direction from the front side to the back of the switchboard panel. A mounting base formed on the front and rear ends of the support member, provided with a bus mounting base for bolting the bus bars of each phase dispersed on the lower surface side, and the bus mounting base has the mounting seat surface of the bus facing diagonally forward and downward. A distribution board busbar support device, characterized in that the apparatus is installed on a support frame on the panel side via a cable. 請求項１記載の母線支持装置において、母線支持部材は、断面Ｈ形のフレームを基体として、その下面側に分散形成した母線取付台座の相互間に鍔状の相間バリヤーを形成したことを特徴とする配電盤の母線支持装置。 2. The busbar support device according to claim 1, wherein the busbar support member has a frame-like interphase barrier formed between busbar mounting bases dispersedly formed on a lower surface side of a frame having an H-shaped cross section as a base. Power distribution board bus support device.

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