JP3289418B2 - Switching circuit device for AC power supply - Google Patents
Switching circuit device for AC power supplyInfo
- Publication number
- JP3289418B2 JP3289418B2 JP20243393A JP20243393A JP3289418B2 JP 3289418 B2 JP3289418 B2 JP 3289418B2 JP 20243393 A JP20243393 A JP 20243393A JP 20243393 A JP20243393 A JP 20243393A JP 3289418 B2 JP3289418 B2 JP 3289418B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- power supply
- power
- output
- supplied
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、常用交流電源が単相
交流電源である場合に、非常用電源として三相交流電源
の採用を可能にした交流電源の切替回路装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching circuit for an AC power supply in which a three-phase AC power supply can be used as an emergency power supply when a commercial AC power supply is a single-phase AC power supply.
【０００２】[0002]
【従来の技術】交流負荷に対して安定な交流電気を供給
するため、商用電源から供給される交流電気と，例え
ば，無停電電源装置から供給される交流電気とをそれぞ
れ受電して、常時は商用電源から供給される交流電気を
交流負荷に供給すると共に、商用電源からの交流電気の
供給が途絶えた際には、無停電電源装置から供給される
交流電気を交流負荷に対して供給するようにするため
の、交流電源の切替回路装置が、単独に，あるいは無停
電電源装置に内蔵される等によって広く使用されてい
る。2. Description of the Related Art In order to supply stable AC power to an AC load, AC power supplied from a commercial power supply and AC power supplied from, for example, an uninterruptible power supply are received, and the AC power is always supplied. The AC power supplied from the commercial power supply is supplied to the AC load, and the AC power supplied from the uninterruptible power supply is supplied to the AC load when the supply of the AC power from the commercial power supply is interrupted. In order to achieve this, a switching circuit device of an AC power supply is widely used alone or built in an uninterruptible power supply.
【０００３】図２は、常用交流電源と非常用電源が共に
単相交流電源である場合に用いられている，従来例の交
流電源の切替回路装置の主要部の回路構成を示すその回
路図である。図２において、９は、受電端４１と、受電
端４３と、電源切替手段である周知の２極双投形の電磁
接触器８と、一方の群の単相交流用の出力端である出力
端５１と、他方の群の単相交流用の出力端である出力端
５２とを備えた交流電源の切替回路装置である。受電端
４１は、図示しない商用電源等の常用交流電源からの単
相交流電気を入力し、また、受電端４３は、常用交流電
源と同一の電圧値・周波数値を持つ図示しない単相の非
常用交流電源からの単相交流電気を入力する。FIG. 2 is a circuit diagram showing a circuit configuration of a main part of a conventional AC power supply switching circuit device used when both a normal AC power supply and an emergency power supply are single-phase AC power supplies. is there. In FIG. 2, reference numeral 9 denotes a power receiving end 41, a power receiving end 43, a well-known double-pole double-throw type electromagnetic contactor 8 serving as a power supply switching means, and an output serving as a single-phase AC output end of one group. This is a switching circuit device for an AC power supply having a terminal 51 and an output terminal 52 which is the other group of single-phase AC output terminals. The receiving end 41 receives single-phase AC power from a commercial AC power supply such as a commercial power supply (not shown), and the receiving end 43 has a single-phase emergency (not shown) having the same voltage and frequency values as the commercial AC power supply. Input single-phase AC power from the AC power supply.
【０００４】図２中に示すとおり、電磁接触器８の備え
るその双投の一方の側の入力端８１ａａおよび８１ｂａ
には、常用交流電源からの単相交流電気が、周知の単相
用の配線用遮断器６１Ａを介して入力される。また、そ
の他方の側の入力端８１ａｂおよび８１ｂｂには、非常
用交流電源からの単相交流電気が、周知の単相用の配線
用遮断器６１Ｃを介して入力される。さらに、電磁接触
器８の出力端８２ａおよび８２ｂは、それぞれの共通接
続線９１ａおよび９１ｂに接続されている。さらに、そ
れぞれの出力端５１，５２には、共通接続線９１ａと共
通接続線９１ｂとに接続された接続線が、周知の単相用
の配線用遮断器９Ａ，９Ｂを介して接続されている。As shown in FIG. 2, input terminals 81aa and 81ba on one side of the double throw of the electromagnetic contactor 8 are provided.
, A single-phase AC power from a common AC power supply is input via a known single-phase circuit breaker 61A. Single-phase AC power from an emergency AC power supply is input to the other input terminals 81ab and 81bb via a well-known single-phase circuit breaker 61C. Further, output ends 82a and 82b of the electromagnetic contactor 8 are connected to respective common connection lines 91a and 91b. Furthermore, connection lines connected to the common connection line 91a and the common connection line 91b are connected to the respective output terminals 51 and 52 via well-known single-phase circuit breakers 9A and 9B. .
【０００５】上記の構成を備えた従来例の切替回路装置
９は、常時は、受電端４１から入力した常用交流電源か
らの単相交流電気を、電磁接触器８の入力端８１ａａお
よび８１ｂａから、電磁接触器８の出力端８２ａおよび
８２ｂ、共通接続線９１ａおよび９１ｂを経由し、出力
端５１と出力端５２から図示しない負荷装置に並列に供
給する。また、常用交流電源が喪失された場合には、図
示しない制御回路装置が動作して、電磁接触器８の接点
を入力端８１ａｂおよび８１ｂｂとの側に切替える。こ
の結果、非常用電源からの単相交流電気が、電磁接触器
８の出力端８２ａおよび８２ｂを経由し、出力端５１と
出力端５２から負荷装置に並列に供給される。これによ
り、常用交流電源に事故が発生した場合にも、負荷装置
に対して安定して単相交流電気を供給することを可能に
している。[0005] The conventional switching circuit device 9 having the above-described configuration always supplies single-phase AC power from the common AC power supply input from the power receiving end 41 to the input terminals 81 aa and 81 ba of the electromagnetic contactor 8. Via the output terminals 82a and 82b of the electromagnetic contactor 8 and the common connection lines 91a and 91b, the power is supplied in parallel from the output terminals 51 and 52 to a load device (not shown). When the commercial AC power supply is lost, a control circuit device (not shown) operates to switch the contact point of the electromagnetic contactor 8 to the input terminals 81ab and 81bb. As a result, single-phase AC electricity from the emergency power supply is supplied in parallel to the load device from the output terminals 51 and 52 via the output terminals 82a and 82b of the electromagnetic contactor 8. Thus, even if an accident occurs in the commercial AC power supply, it is possible to stably supply single-phase AC electricity to the load device.
【０００６】なおその際に、出力端５１と出力端５２の
それぞれに接続される負荷装置の容量をほぼ同等にする
ことが、配線用遮断器９Ａ，９Ｂの分担する負荷容量が
バランスすることから好ましいものである。なおまた、
同一群の単相交流用の出力端として、２個以上の出力端
５１，５２を備えた切替回路装置も知られている。At this time, it is necessary to make the capacities of the load devices connected to the output terminal 51 and the output terminal 52 substantially equal, since the load capacities shared by the circuit breakers 9A and 9B are balanced. It is preferred. Also,
A switching circuit device having two or more output terminals 51 and 52 as output terminals for single-phase AC of the same group is also known.
【０００７】[0007]
【発明が解決しようとする課題】前述した従来技術によ
る交流電源の切替回路装置においては、単相の交流負荷
装置に対して安定して交流電気を供給することを可能と
しているが、しかしながら、次記する問題点が有る。す
なわち、非常用電源に採用されることの多い無停電電源
装置は、その容量が大きくなると標準品として準備され
ているものはほとんどの場合に三相仕様品である。この
三相仕様の無停電電源装置を非常用電源として採用した
場合には、負荷装置が単相の負荷装置であるために、三
相仕様の無停電電源装置から見た場合には周知のとおり
不平衡負荷となるので、無停電電源装置は低い効率で運
転されることとなる等の不都合を生じる。In the above-described conventional AC power supply switching circuit device, it is possible to stably supply AC power to a single-phase AC load device. There is a problem to be noted. That is, the uninterruptible power supply that is often adopted as an emergency power supply is, in most cases, a three-phase specification product prepared as a standard product when its capacity becomes large. When this three-phase uninterruptible power supply is used as an emergency power supply, the load device is a single-phase load device. Because of the unbalanced load, the uninterruptible power supply has disadvantages such as being operated with low efficiency.
【０００８】この発明は、前述の従来技術の問題点に鑑
みなされたものであり、その目的は、常用交流電源が単
相交流電源である場合であっても、非常用電源として三
相交流電源の採用を可能にした交流電源の切替回路装置
を提供することにある。The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a three-phase AC power supply as an emergency power supply even when the commercial AC power supply is a single-phase AC power supply. It is an object of the present invention to provide an AC power supply switching circuit device which enables the use of the above.
【０００９】[0009]
【課題を解決するための手段】この発明では前述の目的
は、 １）常用交流電源と非常用交流電源とを切り替えて，負
荷装置に交流電気を供給するようにするために使用され
る装置であって、常用交流電源の受電端と、非常用電源
の受電端と、それぞれの受電端から入力した交流電源を
切り替える電源切替手段と、電源切替手段の出力端に接
続された２群の単相交流用の出力端とを備えた交流電源
の切替回路装置において、常用交流電源が単相交流電源
であり、非常用電源が三相交流電源であり、非常用電源
の受電端と電源切替手段との間に接続された三相−二相
変換手段と、少なくとも３極の端子を有する電源切替手
段とを備え、三相−二相変換手段から出力される二相の
交流出力のそれぞれの相の交流電気を、それぞれの群の
単相交流用の出力端に個別に供給すると共に、常用交流
電源からの交流電気を、それぞれの群の単相交流用の出
力端に並列に供給する構成とすること、により達成され
る。SUMMARY OF THE INVENTION According to the present invention, there are provided the following objects: 1) A device used for switching between a normal AC power supply and an emergency AC power supply to supply AC power to a load device. There are a power receiving end of a commercial AC power supply, a power receiving end of an emergency power supply, power supply switching means for switching AC power input from each power receiving end, and two groups of single-phases connected to output terminals of the power supply switching means. An AC power supply switching circuit device having an AC output terminal, wherein the service AC power supply is a single-phase AC power supply, the emergency power supply is a three-phase AC power supply, and the power receiving end of the emergency power supply and the power supply switching means. A three-phase-to-two-phase conversion means connected between the two-phase conversion means, and power supply switching means having at least three-pole terminals. AC electricity for each group of single-phase AC This is achieved by supplying the AC power from the commercial AC power supply to the output terminals of the respective groups in parallel to the single-phase AC output terminals while supplying the AC power individually to the output terminals.
【００１０】[0010]
【作用】この発明においては、交流電源の切替回路装置
において、常用交流電源が単相交流電源であり、非常用
電源が三相交流電源であり、非常用電源の受電端と電源
切替手段との間に接続された三相−二相変換手段と、少
なくとも３極の端子を有する電源切替手段とを備え、三
相−二相変換手段から出力される二相の交流出力のそれ
ぞれの相の交流電気を、それぞれの群の単相交流用の出
力端に個別に供給すると共に、常用交流電源からの交流
電気を、それぞれの群の単相交流用の出力端に並列に供
給する構成とすることにより、非常用電源の受電端から
入力された三相交流電気は、まず、三相−二相変換手段
により二相交流電気に変換される。この二相交流電気
は、少なくとも３極の端子を有する電源切替手段を介し
て，それぞれの群の単相交流用の出力端に供給される
が、その際に、二相交流電気の各相の交流電気はそれぞ
れの出力端に個別に供給されるので、単相の負荷装置に
供給する交流電気を，三相−二相変換手段手段から見た
場合に、平衡状態で供給することが可能となる。According to the present invention, in the switching circuit apparatus for an AC power supply, the service AC power supply is a single-phase AC power supply, the emergency power supply is a three-phase AC power supply, and the power receiving end of the emergency power supply and the power supply switching means are connected. Three-phase to two-phase conversion means connected between the power supply means and at least three-pole power supply switching means, and the two-phase AC output of the two-phase AC output from the three-phase to two-phase conversion means. A configuration in which electricity is supplied individually to the single-phase AC output terminals of each group, and AC power from a common AC power supply is supplied in parallel to the single-phase AC output terminals of each group. Accordingly, the three-phase AC electricity input from the power receiving end of the emergency power supply is first converted into two-phase AC electricity by the three-phase to two-phase conversion means. The two-phase AC electricity is supplied to the output terminals for single-phase AC of each group via power switching means having at least three-pole terminals. Since the AC power is individually supplied to each output terminal, the AC power supplied to the single-phase load device can be supplied in a balanced state when viewed from the three-phase to two-phase conversion means. Become.
【００１１】また、常用交流電源の受電端から入力され
た単相交流電気は、電源切替手段を介して，それぞれの
群の単相交流用の出力端に供給されるが、その際に、こ
の単相交流電気はそれぞれの出力端に並列に供給される
ので、従来例と同様にして負荷装置に単相交流電気を供
給することが可能である。The single-phase AC power input from the receiving end of the commercial AC power supply is supplied to the single-phase AC output terminals of each group via the power supply switching means. Since the single-phase AC electricity is supplied to the respective output terminals in parallel, it is possible to supply the single-phase AC electricity to the load device in the same manner as in the conventional example.
【００１２】[0012]
【実施例】以下この発明の実施例を図面を参照して詳細
に説明する。図１は、この発明の一実施例による交流電
源の切替回路装置の主要部の回路構成を示すその回路図
である。図１において、図２に示した従来例の交流電源
の切替回路装置と同一部分には同じ符号を付し、その説
明を省略する。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram showing a circuit configuration of a main part of an AC power supply switching circuit device according to an embodiment of the present invention. In FIG. 1, the same parts as those of the conventional AC power supply switching circuit device shown in FIG. 2 are denoted by the same reference numerals, and the description thereof will be omitted.
【００１３】図１において、１は、図２に示した従来例
による交流電源の切替回路装置９に対して、受電端４３
に替えて受電端４２を、配線用遮断器６１Ｃに替えて周
知の三相用の配線用遮断器６１Ｂを、電磁接触器８に替
えて電磁接触器７を、および共通接続線９１ａ，９１ｂ
に替えて３線の共通接続線３ａ，３ｂおよび３ｃを用い
るようにし、しかも、三相−二相変換手段としての周知
のスコット結線変圧器２を備えた交流電源の切替回路装
置である。In FIG. 1, reference numeral 1 denotes a power receiving terminal 43 with respect to the AC power supply switching circuit device 9 according to the conventional example shown in FIG.
, The power receiving end 42, the known circuit breaker 61B for three-phase instead of the circuit breaker 61C, the electromagnetic contactor 7 instead of the electromagnetic contactor 8, and the common connection lines 91a, 91b.
Instead of using three common connection lines 3a, 3b and 3c, this is an AC power supply switching circuit device provided with a well-known Scott connection transformer 2 as three-phase to two-phase conversion means.
【００１４】受電端４２は、常用交流電源と同一の周波
数値を持つ図示しない三相の非常用交流電源からの三相
交流電気を入力する。スコット結線変圧器２は、その二
相側の相電圧が常用交流電源と同一の電圧値を持つと共
に、その三相側は配線用遮断器６１Ｂに、また、その二
相側は電磁接触器７に接続される。図１中に示したよう
に、電源切替手段である電磁接触器７は、周知の３極双
投の電磁接触器であり、双投の一方の側の入力端として
入力端７１ａａ，７１ｂａおよび７１ｃａを、また、他
方の側の入力端として入力端７１ａｂ，７１ｂｂおよび
７１ｃｂを、さらに、出力端として出力端７２ａ，７２
ｂおよび７２ｃとを備えている。受電端４１に入力され
る単相交流電気を通流する一方の接続線は、入力端７１
ａａと７１ｃａとに、また、単相交流電気を通流する他
方の接続線は、入力端７１ｂａにそれぞれ接続されてい
る。スコット結線変圧器２の二相側出力の、一方の相の
出力は入力端７１ａｂと７１ｂｂとに、他方の相の出力
は入力端７１ｂｂと７１ｃｂとに、それぞれ接続されて
いる。The power receiving terminal 42 receives three-phase AC power from a three-phase emergency AC power supply (not shown) having the same frequency value as that of the commercial AC power supply. The Scott connection transformer 2 has a two-phase phase voltage having the same voltage value as that of a commercial AC power supply, a three-phase side thereof being connected to a circuit breaker 61B, and a two-phase side being provided with an electromagnetic contactor 7. Connected to. As shown in FIG. 1, an electromagnetic contactor 7 serving as a power supply switching means is a well-known three-pole double-throw electromagnetic contactor, and has input terminals 71aa, 71ba and 71ca as input terminals on one side of the double-throw. And input terminals 71ab, 71bb and 71cb as input terminals on the other side, and output terminals 72a, 72c as output terminals.
b and 72c. One connection line through which the single-phase AC electricity input to the power receiving end 41 flows is connected to the input end 71.
The other connection lines for passing aa and 71ca and the single-phase AC electricity are connected to the input terminal 71ba. The output of one phase of the two-phase output of the Scott connection transformer 2 is connected to the input terminals 71ab and 71bb, and the output of the other phase is connected to the input terminals 71bb and 71cbb, respectively.
【００１５】さらに、電磁接触器７の持つ出力端は、出
力端７２ａが共通接続線３ａに、出力端７２ｂが共通接
続線３ｂに、また、出力端７２ｃが共通接続線３ｃに、
それぞれ接続されている。そのうえで、配線用遮断器９
Ａの入力端は共通接続線３ａと３ｂとに、また、配線用
遮断器９Ｂの入力端は共通接続線３ｂと３ｃとにそれぞ
れ接続されている。Further, the output terminal of the electromagnetic contactor 7 has an output terminal 72a on the common connection line 3a, an output terminal 72b on the common connection line 3b, an output terminal 72c on the common connection line 3c,
Each is connected. Then, the circuit breaker 9
The input terminal of A is connected to the common connection lines 3a and 3b, and the input terminal of the circuit breaker 9B is connected to the common connection lines 3b and 3c.
【００１６】この発明では前述の構成としたので、受電
端４２から入力された三相交流電気は、スコット結線変
圧器２により二相交流電気に変換される。この二相交流
電気は、３極双投の電磁接触器７を介して、いったん共
通接続線３ａ，〜３ｃに供給される。そのうえで、共通
接続線３ａ，〜３ｃ、配線用遮断器９Ａ，９Ｂおよび出
力端５１，５２を介して、負荷装置に供給される。その
際に、スコット結線変圧器２から出力される二相交流電
気は、一方の相の交流電気が出力端５１から出力端５１
に接続されている単相交流負荷装置に、また、他方の相
の交流電気が出力端５２から出力端５２に接続されてい
る単相交流負荷装置に、それぞれ個別に供給される。し
たがって、これらの負荷装置の容量がほぼ同等である
と、スコット結線変圧器２の二相側はほぼ平衡状態とな
り、周知のことから、スコット結線変圧器２の三相側も
その二相側と同程度の平衡状態となるのである。In the present invention, the three-phase AC power input from the power receiving terminal 42 is converted into two-phase AC power by the Scott connection transformer 2 because of the above-described configuration. This two-phase AC electricity is once supplied to the common connection lines 3a, 3c via the three-pole double-throw electromagnetic contactor 7. Then, the power is supplied to the load device via the common connection lines 3a to 3c, the circuit breakers 9A and 9B, and the output terminals 51 and 52. At this time, the two-phase AC electricity output from the Scott connection transformer 2 is such that one-phase AC electricity is output from the output terminal 51 to the output terminal 51.
, And the AC power of the other phase is separately supplied from the output terminal 52 to the single-phase AC load device connected to the output terminal 52. Therefore, when the capacities of these load devices are substantially equal, the two-phase side of the Scott connection transformer 2 is in a substantially equilibrium state. It is well known that the three-phase side of the Scott connection transformer 2 is also connected to the two-phase side. The equilibrium state is about the same.
【００１７】なお、常用交流電源が健全である場合に
は、受電端４１から入力された単相交流電気は、電磁接
触器７を介して，出力端５１と出力端５２とからそれぞ
れの負荷装置に供給されるが、その際に、それ単相交流
電気はそれぞれの出力端５１，５２に並列に供給される
ので、この場合には、従来例の交流電源の切替回路装置
９と同様にして単相交流電気を供給することが可能であ
る。When the commercial AC power supply is sound, the single-phase AC power input from the power receiving terminal 41 is transmitted to the respective load devices from the output terminal 51 and the output terminal 52 via the electromagnetic contactor 7. In this case, the single-phase AC power is supplied to the respective output terminals 51 and 52 in parallel, and in this case, the switching power supply is switched in the same manner as the conventional AC power supply switching circuit device 9. It is possible to supply single-phase AC electricity.
【００１８】実施例における今までの説明では、三相−
二相変換手段はスコット結線変圧器であるとしてきた
が、これに限定されるものではなく、例えば、周知の変
形ウッドブリッジ結線変圧器であってもよいものであ
る。変形ウッドブリッジ結線変圧器は、三相の非常用交
流電源がその中性点で接地されている場合に用いて好適
な三相−二相変換手段である。In the above description of the embodiment, three-phase
Although the two-phase conversion means has been described as being a Scott connection transformer, it is not limited to this, and may be, for example, a well-known modified Woodbridge connection transformer. A modified Woodbridge connection transformer is a suitable three-phase to two-phase conversion means used when a three-phase emergency AC power supply is grounded at its neutral point.
【００１９】[0019]
【発明の効果】この発明においては、前述の構成として
三相交流電源から三相交流電力を単相の負荷装置に供給
するのに際して、三相交流電源から見た場合に平衡状態
で供給することを可能にすることにより、三相仕様の無
停電電源装置等の三相交流電源を、高い効率で運転する
ことを可能にするとの効果が有る。According to the present invention, when three-phase AC power is supplied from a three-phase AC power supply to a single-phase load device as described above, the three-phase AC power is supplied in a balanced state as viewed from the three-phase AC power supply. This has the effect of enabling a three-phase AC power supply such as a three-phase uninterruptible power supply to be operated with high efficiency.
【図１】この発明の一実施例による交流電源の切替回路
装置の主要部の回路構成を示すその回路図FIG. 1 is a circuit diagram showing a circuit configuration of a main part of an AC power supply switching circuit device according to an embodiment of the present invention.
【図２】従来例の交流電源の切替回路装置の主要部の回
路構成を示すその回路図FIG. 2 is a circuit diagram showing a circuit configuration of a main part of a conventional AC power supply switching circuit device.
１ 切替回路装置 ２ 三相−二相変換手段（スコット結線変圧器） ３ 共通接続線 ４１ 受電端 ４２ 受電端 ６１Ｂ 配線用遮断器 ７ 電源切替手段（電磁接触器） ９Ａ 配線用遮断器 ９Ｂ 配線用遮断器 DESCRIPTION OF SYMBOLS 1 Switching circuit device 2 Three-phase to two-phase conversion means (Scott connection transformer) 3 Common connection line 41 Power receiving end 42 Power receiving end 61B Wiring breaker 7 Power switching means (electromagnetic contactor) 9A Wiring breaker 9B Wiring Circuit breaker
Claims (1)
えて，負荷装置に交流電気を供給するようにするために
使用される装置であって、常用交流電源の受電端と、非
常用電源の受電端と、それぞれの受電端から入力した交
流電源を切り替える電源切替手段と、電源切替手段の出
力端に接続された２群の単相交流用の出力端とを備えた
交流電源の切替回路装置において、 常用交流電源が単相交流電源であり、非常用電源が三相
交流電源であり、非常用電源の受電端と電源切替手段と
の間に接続された三相−二相変換手段と、少なくとも３
極の端子を有する電源切替手段とを備え、三相−二相変
換手段から出力される二相の交流出力のそれぞれの相の
交流電気を、それぞれの群の単相交流用の出力端に個別
に供給すると共に、常用交流電源からの交流電気を、そ
れぞれの群の単相交流用の出力端に並列に供給すること
を特徴とする交流電源の切替回路装置。An apparatus for switching between a normal AC power supply and an emergency AC power supply to supply AC power to a load device, comprising: a power receiving end of the normal AC power supply; Power supply switching means for switching an AC power input from each of the power receiving ends, and two groups of single-phase AC output terminals connected to the output terminals of the power switching means. In the device, the commercial AC power supply is a single-phase AC power supply, the emergency power supply is a three-phase AC power supply, and three-phase to two-phase conversion means connected between the power receiving end of the emergency power supply and the power supply switching means. , At least 3
Power switching means having a pole terminal, the two-phase AC output from the three-phase to two-phase conversion means, the AC electricity of each phase is individually output to a single-phase AC output terminal of each group. A switching circuit for an AC power supply, wherein AC power from a commercial AC power supply is supplied in parallel to the single-phase AC output terminals of each group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20243393A JP3289418B2 (en) | 1993-08-17 | 1993-08-17 | Switching circuit device for AC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20243393A JP3289418B2 (en) | 1993-08-17 | 1993-08-17 | Switching circuit device for AC power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0759272A JPH0759272A (en) | 1995-03-03 |
| JP3289418B2 true JP3289418B2 (en) | 2002-06-04 |
Family
ID=16457444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20243393A Expired - Lifetime JP3289418B2 (en) | 1993-08-17 | 1993-08-17 | Switching circuit device for AC power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3289418B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009040943A1 (en) * | 2007-09-28 | 2009-04-02 | Fujitsu Limited | Power supply device |
| KR100964599B1 (en) * | 2009-11-30 | 2010-06-21 | 주하(주) | Uninterrupted power supply system and uninterupted power supply device |
| JP5926673B2 (en) * | 2012-10-19 | 2016-05-25 | 東芝三菱電機産業システム株式会社 | Uninterruptible power system |
| JP2015070757A (en) * | 2013-09-30 | 2015-04-13 | パナソニック株式会社 | Distribution board adaptable to plural contracts of electric power companies |
| CN104319872A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Low-voltage electrical parallel connection air circuit breaker of transformer substation |
-
1993
- 1993-08-17 JP JP20243393A patent/JP3289418B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0759272A (en) | 1995-03-03 |
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