JP4277970B2

JP4277970B2 - Power supply device

Info

Publication number: JP4277970B2
Application number: JP2000258296A
Authority: JP
Inventors: 典夫小関; 宏細水
Original assignee: Toshiba Corp; Toshiba Lighting and Technology Corp
Current assignee: Toshiba Corp; Toshiba Lighting and Technology Corp
Priority date: 2000-08-29
Filing date: 2000-08-29
Publication date: 2009-06-10
Anticipated expiration: 2020-08-29
Also published as: JP2002078118A

Description

【０００１】
【発明の属する技術分野】
本発明は、単相三線式で電力供給を受けて屋内配線を行う電源供給装置に関する。
【０００２】
【従来の技術】
一般に、屋内配線に用いられる単相三線式は、中性線と２本の電力供給線との３本の配線路からなり、１００Ｖの負荷と２００Ｖの負荷を併用する場合や電灯を多数施設する場合に使用される。１００Ｖの負荷は中性線と２本の電力線との間にそれぞれ接続され、２００Ｖの負荷は２本の電力供給線との間に接続されて使用される。
【０００３】
図２は、従来の電源供給装置の構成図である。電力系統から分電盤１に単相三線式電線路２が引き込まれる。いま、中性線をＮとし、電力供給線は三相のＶ相、Ｕ相、Ｗ相のうちのＶ相とＵ相で、１００Ｖの負荷に対し負荷電源を供給するものとする。
【０００４】
この場合、分電盤１では、メインブレーカ３を介して単相三線式電線路２の中性線Ｎおよび２本の電力供給線Ｖ、Ｕが引き込まれ、中性線Ｎと電力供給線Ｖ、Ｕとで１００Ｖの単相二線式分岐線５を取り出す。そして、個別の配線用遮断器４を介して各々の負荷系統に対して単相二線式分岐線５により負荷電源が分配される。
【０００５】
単相二線式分岐線５にはコンセントの受け口となる複数個のタップ６が設けられ、このタップ６のコンセントから負荷に電源が供給される。また、各々の負荷系統の電源容量は配電用遮断器４の遮断容量により決められる。すなわち、これらの単相二線式分岐線５の負荷系統は、配線用遮断器４の電気容量で使用負荷が保護されると共に制限されている。
【０００６】
【発明が解決しようとする課題】
しかし、このような従来の電源供給装置では、１００Ｖの負荷に対しては単相三線式で受電後に分電盤１において単相二線式分岐線５が引き出されるので、２００Ｖの負荷に対しては別途２００Ｖ専用の配線路が必要となり、有効的な電気使用ができない。
【０００７】
また、分電盤１からの単相二線式分岐線５の取出し口は、個別に配線設置されるため、Ｖ相とＵ相との区別が不明なまま使用されている。このことから、相バランスが確保できない場合があり、効率の良い使用ができない。
【０００８】
図３に示すように、Ｖ相と中性線Ｎとの間に１００Ｖ負荷７が接続され、Ｕ相と中性線Ｎとの間に１００Ｖ負荷８が接続され、さらにＶ相とＵ相との間に２００Ｖ負荷９が接続されている場合には、Ｖ相、Ｕ相のアンバランスは、中性線ＮにＩ₁−Ｉ₂の電流が流れるので、その中性線Ｎのラインインピーダンスの分だけ電圧変化（±△Ｖ）を生じさせ、負荷に対して不適切な電力供給を行うことになる。
【０００９】
本発明の目的は、２本の電力供給線にバランス良く負荷電源を分配でき、しかも１００Ｖ／２００Ｖの各負荷に電源供給を容易に行える電源供給装置を提供することである。
【００１０】
【課題を解決するための手段】
請求項１の発明に係わる電源供給装置は、電力系統から中性線と２本の電力供給線との３本の配線路からなり中性線と電力供給線との間は１００Ｖで２本の電力供給線との間は２００Ｖである単相三線式で受電し複数の負荷系統に対して所定の電源容量で負荷電源を分配する分電盤と、前記分電盤で分配された負荷電源を各々の負荷系統に供給する複数の単相三線式分岐線と、１００Ｖ負荷に負荷電流を供給するパワーダクトおよび２００Ｖ負荷に負荷電流を供給するパワーダクトとを備え、前記パワーダクトのうち１００Ｖ負荷に負荷電流を供給するパワーダクトは、前記単相三線式分岐線を中継する中継端子と、前記中継端子で中継された単相三線式分岐線の２本の電力供給線のうちの一方の電力供給線と前記中性線との間から負荷に供給する電力を取り出す一方のコンセントと他方の電力供給線と前記中性線との間から負荷に供給する電力を取り出す他方のコンセントとの２個のコンセントからなる一対のコンセントと、前記一対のコンセントと前記中継端子との間に接続され前記負荷が過負荷となったときに動作する保護遮断器とを備え、前記パワーダクトのうち２００Ｖ負荷に負荷電流を供給するパワーダクトは、前記単相三線式分岐線を中継する中継端子と、前記中継端子で中継された単相三線式分岐線のうち２本の電力供給線の間から負荷に供給する電力を取り出すコンセントと、前記コンセントと前記中継端子との間に接続され前記負荷が過負荷となったときに動作する保護遮断器とを備え、前記単相三線式分岐線の中性線および電力供給線は前記中継端子を介してスルーする形で１００Ｖのパワーダクトおよび２００Ｖのパワーダクトに接続されることを特徴とする。
【００１６】
【発明の実施の形態】
以下、本発明の実施の形態を説明する。図１は本発明の実施の形態に係わる電源供給装置の構成図である。この実施の形態は、図２に示した従来例に対し、単相二線式分岐線５に代えて単相三線式分岐線１０として電源供給幹線を構成し、タップ６に代えてパワーダクト１１を設けたものである。
【００１７】
パワーダクト１１は単相三線式分岐線１０により負荷電源を受電した後、２本の電力供給線Ｖ、Ｕの接続の組み合わせにより１００Ｖ／２００Ｖの負荷に対しての電源供給に対応する。また、パワーダクト１１での中継接続で単相三線式分岐線１０の延長を可能とする。
【００１８】
図１において、分電盤１からメインブレーカ３を介して単相三線式電線路２の中性線Ｎおよび２本の電力供給線Ｖ、Ｕが引き込み、配電用遮断器４を介して複数本の単相三線式分岐線１０を取り出す。これにより、各々の負荷系統に対して単相三線式分岐線１０により負荷電源が分配される。
【００１９】
負荷系統は、例えば小売業の店舗の販売什器が接続される系統であり、店舗の中に各種の販売什器が設置されている。これらの販売什器の電気仕様は、１００Ｖ、２００Ｖが混在しているとともに、販売什器の入れ替えが定期的に行われている。この販売什器を設置する場所に、必要な電源容量を確保した単相三線式分岐線１０で負荷電源を供給する。必要な電源容量は配電用遮断器４の遮断容量を考慮して決められる。
【００２０】
各々の負荷系統の単相三線式分岐線１０には、販売什器が接続されるパワーダクト１１ａ〜１１ｄが設けられている。これらパワーダクト１１は単相三線式分岐線１０を中継端子１２で中継し、単相三線式分岐線１０により負荷電源を受電した後、２本の電力供給線Ｖ、Ｕの接続の組み合わせにより１００Ｖ負荷または２００Ｖ負荷に対しての電源供給に対応する。
【００２１】
例えば、パワーダクト１１ａ〜１１ｃは、１００Ｖ負荷に負荷電流を供給する構成のパワーダクトであり、電力供給線Ｖ、Ｕを単独構成し、それぞれ分岐回路を保護する保護遮断器１３を介して一対のコンセント１４に１００Ｖを送っている。すなわち、中性線Ｎと電力供給線Ｖ、Ｕとの間からそれぞれ保護遮断器１３を介して２個のコンセント１４に接続し、このコンセント１４からそれぞれ１００Ｖ負荷に電力を供給する。この２個のコンセントは、一方はＶ相から負荷電源が供給され、他方はＵ相から負荷電源が供給されるので、一対のコンセントの双方を使用した場合には、各相の流れる負荷電流を均一化できるようになっている。なお、保護遮断器１３としては過電流遮断器が用いられている。また、中性線Ｎおよび電力供給線Ｖ、Ｕは中継端子１２を介してスルーする形となる。
【００２２】
一方、パワーダクト１１ｄは、２００Ｖ負荷に負荷電流を供給する構成のパワーダクトであり、単相三線式分岐線１０を中継端子１２で中継し、電力供給線Ｖ、Ｕを並列に取り込み、分岐回路を保護する保護遮断器１３を介してコンセント１４に２００Ｖを送っている。すなわち、単相三線式分岐線１０のうち２本の電力供給線Ｖ、Ｕの間から、２本のコンセント１４を取り出し、このコンセント１４から２００Ｖ負荷に負荷電源を供給するようにしている。
【００２３】
この場合、中性線Ｎおよび電力供給線Ｖ、Ｕは中継端子１２を介してスルーする形となる。パワーダクト１１の中継端子１２は、単相三線式分岐線１０をスルーできるので、デイジーチェーン方式で複数台接続可能となる。
【００２４】
このように、パワーダクト１１は単相三線式分岐線１０を中継端子１２により中継引き込みしているので、電力供給線Ｖ、Ｕの接続を適宜組み合わせることにより、１００Ｖ負荷や２００Ｖ負荷に対応したコンセント１４とすることができる。また、パワーダクト１１の中継端子１２の接続で単相三線式分岐線１０の延長が可能となる。
【００２５】
【発明の効果】
以上説明したように、本発明によれば、負荷に対し単相三線式分岐線で電源供給を行うので、分電盤から負荷までの布線数を減らすことができる。これにより、分電盤からの分岐線が減少するので、配電用遮断器の数を減らすことができ、分電盤の外形寸法を小さくできる。
【００２６】
また、単相三線式分岐線にパワーダクトを設けているので、パワーダクトでの配線により容易に１００Ｖ負荷または２００Ｖ負荷への対応が可能となり、１００Ｖ機器および２００Ｖ機器の混在が可能となる。さらに、パワーダクトの中継機能により必要に応じたコンセントの増減ができる。また、２本の電力供給線Ｖ、Ｕの１００Ｖ供給口を一対のコンセントで構成するので、単相三線式分岐線での電力バランスを目視で調整することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係わる電源供給装置の構成図。
【図２】従来の電源供給装置の構成図。
【図３】単相三線式の電力供給装置における電力供給のアンバランスの説明図。
【符号の説明】
１…分電盤、２…単相三線式電線路、３…メインブレーカ、４…配電用遮断器、５…単相二線式分岐線、６…タップ、７、８…１００Ｖ負荷、９…２００Ｖ負荷、１０…単相三線式分岐線、１１…パワーダクト、１２…中継端子、１３…保護遮断器、１４…コンセント[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply apparatus that performs indoor wiring by receiving power supply in a single-phase three-wire system.
[0002]
[Prior art]
In general, the single-phase three-wire system used for indoor wiring is composed of three wiring paths of a neutral line and two power supply lines, and a combination of a 100V load and a 200V load and a large number of lamps are installed. Used when. A 100V load is connected between the neutral line and the two power lines, and a 200V load is connected between the two power supply lines.
[0003]
FIG. 2 is a configuration diagram of a conventional power supply apparatus. A single-phase three-wire electric line 2 is drawn into the distribution board 1 from the power system. Now, assume that the neutral line is N, and the power supply line is a V-phase and U-phase among the three-phase V-phase, U-phase, and W-phase, and supplies load power to a 100-V load.
[0004]
In this case, in the distribution board 1, the neutral line N and the two power supply lines V and U of the single-phase three-wire electric line 2 are drawn through the main breaker 3, and the neutral line N and the power supply line V are drawn. , U and 100 V single-phase two-wire branch line 5 is taken out. Then, the load power supply is distributed by the single-phase two-wire branch line 5 to each load system via the individual circuit breaker 4.
[0005]
The single-phase two-wire branch line 5 is provided with a plurality of taps 6 serving as receptacles for the outlets, and power is supplied from the outlets of the taps 6 to the load. The power capacity of each load system is determined by the breaking capacity of the power distribution breaker 4. That is, the load system of these single-phase two-wire branch lines 5 is protected and limited by the electric capacity of the circuit breaker 4 for wiring.
[0006]
[Problems to be solved by the invention]
However, in such a conventional power supply device, since the single-phase two-wire branch line 5 is drawn out in the distribution board 1 after receiving power in a single-phase three-wire system for a 100-V load, Requires a separate wiring line dedicated to 200V, and cannot be used effectively.
[0007]
Moreover, since the outlet of the single-phase two-wire branch line 5 from the distribution board 1 is individually wired and installed, the distinction between the V-phase and the U-phase is used without being known. For this reason, phase balance may not be ensured, and efficient use is not possible.
[0008]
As shown in FIG. 3, a 100V load 7 is connected between the V phase and the neutral wire N, a 100V load 8 is connected between the U phase and the neutral wire N, and further, the V phase and the U phase When the 200V load 9 is connected between the _two , the current of I ₁ -I ₂ flows through the neutral line N due to the imbalance between the V phase and the U phase. A voltage change (± ΔV) is caused by that amount, and inappropriate power supply to the load is performed.
[0009]
An object of the present invention is to provide a power supply device that can distribute load power to two power supply lines in a well-balanced manner and can easily supply power to each load of 100V / 200V.
[0010]
[Means for Solving the Problems]
The power supply device according to the invention of claim 1 is composed of three wiring paths of a neutral line and two power supply lines from the power system, and the two between the neutral line and the power supply line are 100V. A distribution board that receives power with a single-phase three-wire system of 200 V between the power supply lines and distributes the load power to a plurality of load systems with a predetermined power capacity, and a load power distributed by the distribution board A plurality of single-phase three-wire branch lines to be supplied to each load system ; a power duct for supplying a load current to a 100V load; and a power duct for supplying a load current to a 200V load. The power duct for supplying the load current is one of the two power supply lines of the relay terminal that relays the single-phase three-wire branch line and the single-phase three-wire branch line relayed by the relay terminal. The load is applied between the wire and the neutral wire. A pair of outlets including two outlets, one outlet for taking out the power to be supplied, the other outlet for taking out the power supplied to the load from between the other power supply line and the neutral line, and the pair of outlets And a protective circuit breaker that operates when the load is overloaded, and a power duct that supplies a load current to a 200V load is the single-phase three-wire A relay terminal for relaying the type branch line, an outlet for taking out power to be supplied to the load from between two power supply lines among the single-phase three-wire branch lines relayed by the relay terminal, the outlet and the relay terminal includes connected the load and a protective circuit breaker which operates when an overload between the neutral line and the power supply line of the single-phase three-wire branch line via the relay terminals Characterized in that it is connected to the power duct power ducts and 200V, 100V in the form of through.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a power supply apparatus according to an embodiment of the present invention. This embodiment is different from the conventional example shown in FIG. 2 in that a power supply trunk line is configured as a single-phase three-wire branch line 10 instead of the single-phase two-wire branch line 5 and a power duct 11 instead of the tap 6. Is provided.
[0017]
The power duct 11 receives load power from the single-phase three-wire branch line 10 and then responds to power supply to a 100 V / 200 V load by combining the two power supply lines V and U. In addition, the single-phase three-wire branch line 10 can be extended by relay connection in the power duct 11.
[0018]
In FIG. 1, a neutral line N and two power supply lines V and U are drawn from a distribution board 1 through a main breaker 3 through a main breaker 3, and a plurality of lines are connected through a distribution breaker 4. The single-phase three-wire branch line 10 is taken out. Thereby, the load power source is distributed by the single-phase three-wire branch line 10 to each load system.
[0019]
The load system is a system to which, for example, sales fixtures of retail stores are connected, and various sales fixtures are installed in the stores. As for the electrical specifications of these sales fixtures, 100V and 200V are mixed, and the sales fixtures are regularly replaced. A load power supply is supplied to the place where this sales fixture is installed by a single-phase three-wire branch line 10 that secures a necessary power supply capacity. The necessary power supply capacity is determined in consideration of the breaking capacity of the power distribution breaker 4.
[0020]
The single-phase three-wire branch line 10 of each load system is provided with power ducts 11a to 11d to which sales fixtures are connected. These power ducts 11 have a single-phase three-wire branch line 10 relayed by a relay terminal 12, and after receiving a load power source by the single-phase three-wire branch line 10, a combination of two power supply lines V and U is 100V. It corresponds to the power supply to the load or 200V load.
[0021]
For example, the power ducts 11a to 11c are power ducts configured to supply a load current to a 100V load, and the power supply lines V and U are configured independently, and a pair of protection ducts 13 are provided via the protective circuit breakers 13 that protect the branch circuits. 100V is sent to the outlet 14. That is, each of the neutral line N and the power supply lines V and U is connected to the two outlets 14 via the protective circuit breakers 13, and power is supplied from the outlet 14 to the 100 V load. One of these two outlets is supplied with load power from the V phase, and the other is supplied with load power from the U phase. Therefore, when both of a pair of outlets are used, the load current flowing through each phase is calculated. It can be made uniform. An overcurrent circuit breaker is used as the protective circuit breaker 13. Further, the neutral line N and the power supply lines V and U pass through the relay terminal 12.
[0022]
On the other hand, the power duct 11d is a power duct configured to supply a load current to a 200V load. The single-phase three-wire branch line 10 is relayed by the relay terminal 12 and the power supply lines V and U are taken in parallel to branch the circuit. 200V is sent to the outlet 14 through the protective circuit breaker 13 that protects the battery. That is, two outlets 14 are taken out from between the two power supply lines V and U of the single-phase three-wire branch line 10, and load power is supplied from the outlets 14 to a 200 V load.
[0023]
In this case, the neutral line N and the power supply lines V and U pass through the relay terminal 12. Since the relay terminals 12 of the power duct 11 can pass through the single-phase three-wire branch line 10, a plurality of relay terminals 12 can be connected by a daisy chain method.
[0024]
Thus, since the power duct 11 relays the single-phase three-wire branch line 10 by the relay terminal 12, the outlet corresponding to 100V load or 200V load can be obtained by appropriately combining the connections of the power supply lines V and U. 14 can be used. Further, the single-phase three-wire branch line 10 can be extended by connecting the relay terminal 12 of the power duct 11.
[0025]
【The invention's effect】
As described above, according to the present invention, since the power is supplied to the load through the single-phase three-wire branch line, the number of wires from the distribution board to the load can be reduced. Thereby, since the branch line from a distribution board reduces, the number of distribution circuit breakers can be reduced and the external dimension of a distribution board can be made small.
[0026]
Moreover, since the power duct is provided in the single-phase three-wire branch line, it is possible to easily cope with 100V load or 200V load by wiring in the power duct, and it is possible to mix 100V equipment and 200V equipment. Furthermore, the number of outlets can be increased or decreased as required by the relay function of the power duct. Moreover, since the 100V supply port of the two power supply lines V and U is constituted by a pair of outlets, the power balance in the single-phase three-wire branch line can be visually adjusted.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a power supply device according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a conventional power supply device.
FIG. 3 is an explanatory diagram of power supply imbalance in a single-phase three-wire power supply device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Distribution board, 2 ... Single-phase three-wire electric line, 3 ... Main breaker, 4 ... Distribution circuit breaker, 5 ... Single-phase two-wire branch line, 6 ... Tap, 7, 8 ... 100V load, 9 ... 200V load, 10 ... single-phase three-wire branch line, 11 ... power duct, 12 ... relay terminal, 13 ... protective circuit breaker, 14 ... outlet

Claims

A single phase consisting of three wiring paths from a power system to a neutral line and two power supply lines, 100V between the neutral line and the power supply line and 200V between the two power supply lines A distribution board that receives power in a three-wire system and distributes the load power to a plurality of load systems with a predetermined power capacity, and a plurality of single-phase three-wires that supply the load power distributed by the distribution panel to each load system A power duct for supplying a load current to a 100V load and a power duct for supplying a load current to a 200V load. A relay terminal that relays a three-wire branch line and a load from one of the two power supply lines of the single-phase three-wire branch line relayed by the relay terminal and the neutral line With one outlet to take out the power to supply Connected between the pair of outlets and the relay terminal, a pair of outlets comprising two outlets, the other outlet for taking out the power supplied to the load from between the other power supply line and the neutral line A protective circuit breaker that operates when the load is overloaded, and a power duct that supplies a load current to a 200V load among the power ducts includes a relay terminal that relays the single-phase three-wire branch line; , An outlet for taking out the power supplied to the load from between two power supply lines of the single-phase three-wire branch line relayed by the relay terminal, and the load connected between the outlet and the relay terminal and a protective circuit breaker which operates when overloaded, the power duct 100V form neutral line and the power supply line of the single-phase three-wire branch line to the through via the relay terminals And power supply device, characterized in that it is connected to the power duct 200V.