【０００１】
【発明の属する技術分野】
本発明は、低圧配電線における主配電線から分岐配電線への電源供給を切替える低圧配電線電源供給切替装置に関する。
【０００２】
【従来の技術】
従来より、ビルや工場では、電動機や熱源器等動力用幹線として２００Ｖ三相三線式配電線が使用されている。そして、照明やＯＡ機器や小型機器等負荷への１００Ｖ電源供給として、又負荷の重要度や使用状況に応じて切替える場合、図２に示す回路例の如く、主配電線１から１００Ｖ単相二線式分岐配電線Ａと分岐配電線Ｂとを形成している。つまり、主配電線１に開閉器２を備え、開閉器２の電源側及び負荷側から各々２００／１００Ｖ変圧器３，４を介し、開閉器電源側を重要若しくは優先的負荷へ電源供給する分岐配電線Ａとし、開閉器負荷側を比較的重要でない負荷へ電源供給する分岐配電線Ｂとして、開閉器２の入り切りで、主配電線１の負荷と共に分岐配電線Ｂの負荷への電源供給断続を行う。
【０００３】
【発明が解決しようとする課題】
ところが、変圧器は、温度上昇や効率の制約上、一次巻線・二次巻線共太い電線を巻回する必要があり、又鉄心を介在し絶縁処理を施して、大きな形状で重量も重く強固なフレームを添えて据付けるため、低圧配電機器にしては大型機器になってしまう。
更に、特に分岐配電線Ｂ側の変圧器は、開閉器の入り切り頻度が多く、励磁突流による異常電圧を防止するために、鉄心飽和に余裕を持たせようとすると鉄心断面が大きくなり、寸法・重量が増加し、さらには、別途保護装置を備える必要もある。
【０００４】
又、１００／２００Ｖ単相三線式を採用すれば、単にケーブル分岐で済むが、配電設備の施設替えも容易でないし、別途１００Ｖ単相二線式配電線を遠方から引き回すとしても配線処理等が厄介である。
そこで、本発明は、主配電線とする２００Ｖ三相三線式配電線から分岐配電線Ａと分岐配電線Ｂとする１００Ｖ単相二線式配電線を分岐し、且つ分岐配電線Ａと分岐配電線Ｂの負荷重要度等に応じて切替可能とする簡易的な装置を提供するものである。
【０００５】
【課題を解決するための手段】
そこで上記課題を解決するために、本発明は、２００Ｖ三相三線式配電線中に開閉器を接続し、この開閉器の電源側の任意の単相から変圧器を介して１００Ｖ単相二線式配電線を分岐し、さらにこの配電線を２系統に分岐してその一方を前記開閉器の電源側配電線とし他方を前記開閉器の負荷側配電線とするとともに、前記開閉器の負荷側の任意の単相に電圧駆動リレーの駆動コイルを接続し、前記電圧駆動リレーの１対のメイク接点を前記負荷側配電線に挿入接続したものである。
【０００６】
【発明の実施の形態】
以下、図に沿って本発明の実施形態を説明する。
図１は、本発明の実施形態の構成を示す。図において、２００Ｖ三相三線式配電線（主配電線）１に開閉器２が備えられ、その開閉器２の電源側の任意の単相から２００／１００Ｖ変圧器３を介して１００Ｖ分岐配電線Ａが分岐され、この分岐配電線Ａには突然電源供給を断たれると不都合を生じるＯＡ機器等各種機器が接続され、開閉器２の入り切り状態にかかわらず常に電源供給される。
【０００７】
一方、分岐配電線Ａから分岐配電線Ｂを形成し、分岐配電線Ｂは、開閉器２の負荷側主配電線１の単相に設置された２００Ｖ電圧駆動リレー５と連動する１対のメイク接点６を備え、２００Ｖ印加で閉じ無電圧で開放して負荷への電源供給断続を行う。なお、図中のＲｙはリレー５の駆動コイルであり、負荷側主配電線１の単相に接続されている。
【０００８】
そして、分岐配電線Ｂには付加的な機器が接続され、主配電線１に接続されている負荷と共に、必要に応じて開閉器の入り切りで容易に電源供給断続が可能である。
例えば、夏場の電力ピーク時に必要最低限の負荷への電源供給を確保しつつ、しかも小まめな各機器毎のスイッチ操作が不要となり、２００Ｖ主配電線１に設けた開開器２の１回の操作でピークカット可能な一連の機器の電源供給断が可能である。
【０００９】
ここで、分岐配電線Ａに備えた変圧器３は分岐配電線Ｂの負荷も分担し容量が増加するが、前述の電線や鉄心の断面積余裕に加え、基本的な大きさは略決まり、容量増加に応じて若干寸法重量が増加するに留まり、台数を減らせばその分機材等減少がはかれる。
このようにして、本発明の実施形態では、主配電線とする２００Ｖ三相三線式配電線１から１００Ｖ単相二線式配電線を分岐し、照明やＯＡ機器や小型機器等の電源を得られると共に、負荷の重要度等に応じて切替可能として、大掛かりな機器である変圧器台数を減らした簡易的な装置を提供出来る。
【００１０】
【発明の効果】
以上述べたように本発明によれば、２００Ｖ三相三線式配電線中に開閉器を接続し、該開閉器の電源側の任意の単相から変圧器を介して１００Ｖ単相二線式配電線を分岐しさらに配電線を２系統に分岐して一方を該開閉器の電源側配電線とし他方を該開閉器の負荷側配電線とするとともに、該開閉器の負荷側任意の単相に電圧駆動リレーの駆動コイルを接続するとともに該電圧駆動リレーの１対のメイク接点を負荷側配電線に挿入接続したことで、開閉器を閉じるとリレー接点が閉じられて負荷側配電線が通電状態となり、あたかも、開閉器の負荷側に変圧器を接続して１００Ｖ単相二線式配電線を分岐したかのようにして負荷側へ電力を供給することができる。それにより、従来の配電設備に比べて負荷側の変圧器がない分、配電設備が小型化される。
【図面の簡単な説明】
【図１】本発明の実施形態の構成を示す図である。
【図２】従来例を示す図である。
【符号の説明】
１ ２００Ｖ三相三線式配電線
２ 開閉器
３ ２００／１００Ｖ変圧器
５ ２００Ｖ電圧駆動リレー
６ メイク接点
Ａ １００Ｖ分岐配電線
Ｂ 分岐配電線
Ｒｙ 駆動コイル[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a low-voltage distribution line power supply switching device that switches power supply from a main distribution line to a branch distribution line in a low-voltage distribution line.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in buildings and factories, a 200 V three-phase three-wire distribution line has been used as a power main line such as an electric motor or a heat source device. When switching as 100V power supply to a load such as lighting, OA equipment, and small equipment, or when switching according to the importance of the load and the use status, as shown in a circuit example in FIG. A line-type branch distribution line A and a branch distribution line B are formed. That is, a switch 2 is provided in the main distribution line 1, and a power supply side and a load side of the switch 2 supply power to the switch power supply side to important or priority loads via 200 / 100V transformers 3 and 4, respectively. As a distribution line A, and as a branch distribution line B for supplying power to the switch load side to a relatively insignificant load, intermittent power supply to the load of the branch distribution line B together with the load of the main distribution line 1 at the on / off of the switch 2. I do.
[0003]
[Problems to be solved by the invention]
However, transformers need to be wound with thick wires for both primary and secondary windings due to temperature rise and restrictions on efficiency. Since it is installed with a strong frame, it becomes a large equipment for low voltage distribution equipment.
Further, the transformer on the branch distribution line B side has a high frequency of switching on and off the switch, and in order to prevent an abnormal voltage due to an exciting sudden flow, if the core saturation is allowed to have a margin, the core cross section becomes large, and the The weight increases, and it is necessary to provide a separate protection device.
[0004]
In addition, if a 100 / 200V single-phase three-wire system is adopted, cable branching is sufficient, but it is not easy to change the facilities of the power distribution equipment. It is troublesome.
Therefore, the present invention branches a 100V single-phase two-wire distribution line as a branch distribution line A and a branch distribution line B from a 200V three-phase three-wire distribution line as a main distribution line. It is intended to provide a simple device capable of switching according to the load importance of the electric wire B and the like.
[0005]
[Means for Solving the Problems]
To solve the above problems, the present invention connects the switch to a three-phase three-wire distribution line 200V, any 100V single-phase two-wire through the transformer from the single-phase power supply side of the switch branches the formula distribution line, further the distribution line is branched into two lines with a load-side power line of the switch and the other to the one power supply side power line of the switch, the load side of the switch connect the drive coil of the voltage drive relay for any single-phase, Ru Monodea inserted connecting the make contact of a pair of said voltage drive relay to the load side distribution lines.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration of an embodiment of the present invention. In the figure, a switch 2 is provided on a 200 V three-phase three-wire distribution line (main distribution line) 1, and a 100 V branch distribution line is connected from an arbitrary single-phase power supply side of the switch 2 via a 200/100 V transformer 3. A is branched, and various devices such as OA devices that cause inconvenience when the power supply is suddenly cut off are connected to the branch distribution line A, and the power is always supplied regardless of the on / off state of the switch 2.
[0007]
On the other hand, a branch distribution line B is formed from the branch distribution line A, and the branch distribution line B is a pair of make-ups interlocked with a 200 V voltage drive relay 5 installed in a single phase of the load side main distribution line 1 of the switch 2. A contact 6 is provided, which is closed when 200 V is applied and opened when no voltage is applied, so that power supply to the load is interrupted. Note that Ry in the figure is a drive coil of the relay 5 and is connected to a single phase of the load-side main distribution line 1.
[0008]
Further, additional equipment is connected to the branch distribution line B, and the power supply can be easily switched on and off by turning on and off the switch as necessary together with the load connected to the main distribution line 1.
For example, while the power supply to the minimum required load is secured during the peak power season in summer, the switch operation for each device is not required, and the opener 2 provided on the 200V main distribution line 1 is operated once. It is possible to cut off the power supply to a series of devices that can cut the peak by the operation described above.
[0009]
Here, the transformer 3 provided in the branch distribution line A also shares the load of the branch distribution line B and increases the capacity. However, in addition to the above-mentioned cross-sectional area margin of the electric wires and the core, the basic size is substantially determined. As the capacity increases, the dimensional weight increases only slightly, and if the number is reduced, the equipment and the like will be reduced accordingly.
In this manner, in the embodiment of the present invention, the 100 V single-phase two-wire distribution line is branched from the 200 V three-phase three-wire distribution line 1 serving as the main distribution line, and power sources for lighting, OA equipment, small equipment, and the like are obtained. In addition, it is possible to provide a simple device in which the number of transformers, which is a large-scale device, is reduced by making it possible to switch according to the importance of the load.
[0010]
【The invention's effect】
As described above, according to the present invention, a switch is connected to a 200 V three-phase three-wire distribution line, and a 100 V single-phase two-wire system is connected from any single phase on the power supply side of the switch via a transformer. The electric wire is branched and the distribution line is further branched into two systems, one of which is a power supply side distribution line of the switch and the other is a load side distribution line of the switch. By connecting the drive coil of the voltage driven relay and inserting a pair of make contacts of the voltage driven relay into the load side distribution line, when the switch is closed, the relay contact is closed and the load side distribution line is energized. Thus, power can be supplied to the load side as if a transformer were connected to the load side of the switch and the 100 V single-phase two-wire type distribution line was branched. As a result, the size of the power distribution equipment is reduced as compared with the conventional power distribution equipment because there is no transformer on the load side.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.
FIG. 2 is a diagram showing a conventional example.
[Explanation of symbols]
1 200V three-phase three-wire distribution line 2 Switch 3 200 / 100V transformer 5 200V voltage drive relay 6 Make contact A 100V branch distribution line B Branch distribution line Ry Drive coil
