JPH10135053A - On-load tap changer - Google Patents
On-load tap changerInfo
- Publication number
- JPH10135053A JPH10135053A JP8283984A JP28398496A JPH10135053A JP H10135053 A JPH10135053 A JP H10135053A JP 8283984 A JP8283984 A JP 8283984A JP 28398496 A JP28398496 A JP 28398496A JP H10135053 A JPH10135053 A JP H10135053A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic contactor
- motor
- contact
- circuit
- drive coil
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電動操作機構と組合
せてタップの切換動作状況を単独で容易に確認可能な負
荷時タップ切換装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-load tap switching device capable of easily confirming a tap switching operation state by itself in combination with an electric operating mechanism.
【０００２】[0002]
【従来の技術】従来の負荷時タップ切換装置において、
電動操作機構としては一般に図５に示すような回路構成
のものが採用されている。この操作機構は、歩進動作
（STEP-BY-STEP）でタップ切換が行われるようになって
おり、例え連続タップ切換指令を受けても１タップ分の
切換しか行われないようになっている。これはＪＥＣ22
20（1988) の６．構造、６．４．２鎖錠装置の（５）に
も述べられている。2. Description of the Related Art In a conventional tap change device under load,
Generally, an electric operation mechanism having a circuit configuration as shown in FIG. 5 is employed. In this operation mechanism, tap switching is performed in a step-by-step operation (STEP-BY-STEP). Even if a continuous tap switching command is received, only one tap is switched. . This is JEC22
20 (1988) 6. The structure is also described in (6) of the 6.4.2 locking device.
【０００３】ここで、図５に示す電動操作回路について
説明する。図５において、２はタップ切換器を操作する
電動機で、この電動機２はブレーキ用電磁接触器５の常
開接点５ａ、昇圧用電磁接触器３、昇圧用制限開閉器
８、開閉器７及びしゃ断器１を直列に介して３相交流電
源のＵ相、Ｖ相、Ｗ相の各入力端子１４，１５，１６に
それぞれ接続されている。また、昇圧用電磁接触器３に
２つの相を入替えて逆並列に降圧用電磁接触器４と降圧
用制限開閉器９とが直列接続されている。さらに、ブレ
ーキ用電磁接触器５の常閉接点５ｂが電動機２の入力端
の各相間に閉回路が形成されるように接続されている。Here, the electric operation circuit shown in FIG. 5 will be described. In FIG. 5, reference numeral 2 denotes an electric motor for operating a tap changer. The electric motor 2 includes a normally open contact 5a of an electromagnetic contactor 5 for brake, an electromagnetic contactor 3 for boosting, a limit switch 8 for boosting, a switch 7, and a cutoff. Are connected in series to the U-phase, V-phase, and W-phase input terminals 14, 15, 16 of a three-phase AC power supply via a series connection. Also, two phases are exchanged in the step-up electromagnetic contactor 3, and the step-down electromagnetic contactor 4 and the step-down limiting switch 9 are connected in series in anti-parallel. Further, the normally closed contact 5b of the electromagnetic contactor 5 for a brake is connected so that a closed circuit is formed between each phase of the input terminal of the electric motor 2.
【０００４】上記しゃ断器１はその開閉に連動する補助
常開接点１ａ１，１ａ２とトリップコイルＴＣとを備
え、補助常開接点１ａ１の一端はトリップコイルＴＣを
介して外部接続端子１７に接続され、補助常開接点１ａ
１の他端はＷ相に対応する開閉器７と制限開閉器８との
接続間に接続されると共に操作回路の電源線Ｂ２に接続
されている。また、外部接続端子１７にはトリップコイ
ル用押釦スイッチ２５の一端が接続され、その他端はＵ
相に対応する開閉器７と制限開閉器８との接続間に接続
されると共に外部接続端子２０及び操操作回路の電源線
Ｂ１にそれぞれ接続されている。さらに、補助常開接点
１ａ２は外部接続端子１８，１９に接続されている。The circuit breaker 1 has auxiliary normally open contacts 1a1 and 1a2 interlocked with its opening and closing, and a trip coil TC. One end of the auxiliary normally open contact 1a1 is connected to an external connection terminal 17 via a trip coil TC. Auxiliary normally open contact 1a
The other end of the switch 1 is connected between the connection between the switch 7 corresponding to the W phase and the limit switch 8 and also connected to the power supply line B2 of the operation circuit. One end of a trip coil push button switch 25 is connected to the external connection terminal 17, and the other end is
It is connected between the connection between the switch 7 and the limit switch 8 corresponding to the phase, and is also connected to the external connection terminal 20 and the power supply line B1 of the operation circuit. Further, the auxiliary normally open contact 1a2 is connected to the external connection terminals 18 and 19.
【０００５】一方、３Ｃは昇圧用電磁接触器３の駆動コ
イルで、この駆動コイル３Ｃの一端は降圧用電磁接触器
４の補助常閉接点４ｂ、昇圧用制限開閉器８ｂ１、歩進
用補助継電器６の常閉接点６ｂ１及び昇圧用制限開閉器
８ｂ２を直列接続して外部接続端子２１に接続すると共
に、昇圧用押釦スイッチ１２ａ及び昇圧用開閉器１３ｂ
を直列に介して外部接続端子２３に接続されている。On the other hand, 3C is a drive coil of the step-up electromagnetic contactor 3, and one end of the drive coil 3C has an auxiliary normally closed contact 4b of the step-down electromagnetic contactor 4, a step-up limiting switch 8b1, an auxiliary step relay. 6, the normally closed contact 6b1 and the step-up limiting switch 8b2 are connected in series and connected to the external connection terminal 21, and the step-up push button switch 12a and the step-up switch 13b
Are connected to the external connection terminal 23 in series.
【０００６】また、昇圧用制限開閉器８ｂ１と歩進用補
助継電器６の常閉接点６ｂ１との接続間に昇圧用電磁接
触器３の自己保持用の補助常開接点３ａ１の一端が接続
され、その他端は歩進用補助継電器６の常閉接点６ｂ２
及び昇圧用カムスイッチ１０を並列回路を介して操作回
路の一方の電源線Ｂ１に接続されている。One end of a self-holding auxiliary normally open contact 3a1 of the boosting electromagnetic contactor 3 is connected between the connection between the boosting limit switch 8b1 and the normally closed contact 6b1 of the step auxiliary relay 6, The other end is a normally closed contact 6b2 of the auxiliary relay 6 for stepping.
The boosting cam switch 10 is connected to one power supply line B1 of the operation circuit via a parallel circuit.
【０００７】６は歩進用補助継電器で、この歩進用補助
継電器６の一端はブレーキ用電磁接触器５の常開補助接
点５ａ−１及び歩進用カムスイッチ１１を直列にして操
作回路の電源線Ｂ１に接続されると共に、歩進用補助継
電器６の常開接点６ａ１を介して昇圧用制限開閉器８ｂ
２と歩進用補助継電器６の常閉接点６ｂ１との接続間に
接続され、歩進用補助継電器６の他端は操作回路の電源
線Ｂ２に接続されている。また、常開補助接点５ａ−１
及び歩進用カムスイッチ１１の直列回路に並列にブレー
キ用電磁接触器５の常開補助接点５ａ−２と歩進用補助
継電器６の常開接点６ａ２を直列接続されている。Reference numeral 6 denotes an auxiliary stepping relay. One end of the auxiliary stepping relay 6 has a normally open auxiliary contact 5a-1 of the electromagnetic contactor 5 for brake and a stepping cam switch 11 connected in series to operate an operation circuit. It is connected to the power supply line B1, and via the normally open contact 6a1 of the auxiliary relay 6 for stepping up, the voltage limiting switch 8b
2 and the normally closed contact 6b1 of the auxiliary auxiliary relay 6 are connected, and the other end of the auxiliary auxiliary relay 6 is connected to a power supply line B2 of an operation circuit. The normally open auxiliary contact 5a-1
The normally open auxiliary contact 5a-2 of the electromagnetic contactor 5 for brake and the normally open contact 6a2 of the auxiliary relay 6 for stepping are connected in series with the series circuit of the stepping cam switch 11.
【０００８】さらに、４Ｃは降圧用電磁接触器４の駆動
コイルで、この駆動コイル４Ｃの一端は昇圧用電磁接触
器３の補助常閉接点３ｂ、降圧用制限開閉器９ｂ１、歩
進用補助継電器６の常閉接点６ｂ２及び降圧用制限開閉
器９ｂ２を直列にして外部接続端子２２に接続されると
共に、降圧用押釦開閉器１３ａ及び１２ｂを直列に介し
て外部接続端子２３に接続され、その他端は操作回路の
電源線Ｂ２に接続されている。また、歩進用補助継電器
６の常閉接点６ｂ２と降圧用制限開閉器９ｂ２との接続
端に歩進用補助継電器６の常開接点６ａ３の一端を接続
し、その他端は歩進用補助継電器６の一端に接続されて
いる。Reference numeral 4C denotes a drive coil of the step-down electromagnetic contactor 4. One end of the drive coil 4C has an auxiliary normally closed contact 3b of the step-up electromagnetic contactor 3, a step-down limiting switch 9b1, and an auxiliary step relay. 6, the normally closed contact 6b2 and the step-down limiting switch 9b2 are connected in series to the external connection terminal 22, and connected to the external connection terminal 23 through the step-down pushbutton switches 13a and 12b in series. Is connected to the power supply line B2 of the operation circuit. One end of a normally open contact 6a3 of the auxiliary auxiliary relay 6 is connected to a connection end of the normally closed contact 6b2 of the auxiliary auxiliary relay 6 and the step-down limiting switch 9b2, and the other end is an auxiliary auxiliary relay for stepping. 6 is connected to one end.
【０００９】また、降圧用制限開閉器９ｂ１と歩進用補
助継電器６の常閉接点６ｂ２との接続間に自己保持用の
常開接点４ａ１の一端が接続され、その他端は昇圧用電
磁接触器３の自己保持用の補助常開接点３ａ１と歩進用
カムスイッチ１０との接続間に接続されている。One end of a self-holding normally open contact 4a1 is connected between the step-down limiting switch 9b1 and the normally closed contact 6b2 of the step auxiliary relay 6, and the other end is a step-up electromagnetic contactor. 3 is connected between the connection between the self-holding auxiliary normally open contact 3a1 and the stepping cam switch 10.
【００１０】さらに、５Ｃはブレーキ用電磁接触器の駆
動コイルで、この駆動コイル５Ｃの一端は昇圧用電磁接
触器３の補助常開接点３ａ２と降圧用電磁接触器４の常
開接点４ａ２の並列回路を介して操作回路の電源線Ｂ１
に接続され、その他端は操作回路の電源線Ｂ２に接続さ
れている。Reference numeral 5C denotes a drive coil of a brake electromagnetic contactor. One end of the drive coil 5C is connected in parallel with an auxiliary normally open contact 3a2 of the step-up electromagnetic contactor 3 and a normally open contact 4a2 of the step-down electromagnetic contactor 4. Power line B1 of the operation circuit through the circuit
And the other end is connected to the power supply line B2 of the operation circuit.
【００１１】なお、歩進用補助継電器６の一端に常開接
点６ａ４を直列に介して外部接続端子２４に接続されて
いる。ここで、上記外部接続端子２０を電源基準端子と
して外部接続端子２１との間、外部接続端子２２との
間、外部接続端子２３との間に図示しない操作スイッチ
を介して適宜選択的に接続可能になっている。また、外
部接続端子１８，１９にはしゃ断器動作確認回路が接続
され、外部接続端子２４には表示回路が接続されてい
る。Incidentally, one end of the auxiliary auxiliary relay 6 is connected to an external connection terminal 24 via a normally open contact 6a4 in series. Here, the external connection terminal 20 can be selectively connected to the external connection terminal 21, the external connection terminal 22, and the external connection terminal 23 via an operation switch (not shown) as appropriate using the external connection terminal 20 as a power supply reference terminal. It has become. A circuit breaker operation check circuit is connected to the external connection terminals 18 and 19, and a display circuit is connected to the external connection terminal 24.
【００１２】このような従来のタップ切換操作回路にお
いて、いま外部接続端子２０及び２３間を図示しない操
作スイッチにより短絡した状態で昇圧用押釦開閉器１２
ａを押すと、昇圧用電磁接触器の駆動コイル３Ｃが励磁
され、昇圧用電磁接触器３が閉路すると同時にその補助
常開接点３ａ１，３ａ２が閉路すると共に、補助常開接
点３ｂが開路する。補助常開接点３ａ２が閉路すると、
ブレーキ用電磁接触器５の駆動コイル５Ｃが励磁され、
その常閉接点５ａが閉路すると共に、常閉接点５ｂが開
路する。同時にブレーキ用電磁接触器５の補助常開接点
５ａ−１，５ａ−２も閉路する。In such a conventional tap switching operation circuit, the external connection terminals 20 and 23 are short-circuited by an operation switch (not shown), and the step-up
When a is pressed, the drive coil 3C of the step-up electromagnetic contactor is excited, and the step-up electromagnetic contactor 3 is closed, and at the same time, the auxiliary normally open contacts 3a1 and 3a2 are closed, and the auxiliary normally open contact 3b is opened. When the auxiliary normally open contact 3a2 is closed,
The drive coil 5C of the electromagnetic contactor 5 for the brake is excited,
The normally closed contact 5a closes and the normally closed contact 5b opens. At the same time, the auxiliary normally open contacts 5a-1, 5a-2 of the electromagnetic contactor 5 for brake also close.
【００１３】従って、電動機２の入力端の各相間の短絡
回路が開放され、三相の電源回路が通電されることによ
り電動機２は昇圧方向に回転し、タップの切換動作が開
始される。このとき昇圧用電磁接触器３はその常開接点
３ａ１と歩進用補助継電器６の常閉接点６ｂ２により自
己保持回路が形成される。Accordingly, the short circuit between the phases at the input end of the motor 2 is opened, and the three-phase power circuit is energized, so that the motor 2 rotates in the step-up direction and the tap switching operation is started. At this time, a self-holding circuit is formed by the normally open contact 3a1 of the step-up electromagnetic contactor 3 and the normally closed contact 6b2 of the auxiliary auxiliary relay 6 for stepping.
【００１４】タップ切換が開始されると、昇圧用カムス
イッチ１０、歩進用カムスイッチ１１が相次いで閉動作
し、昇圧用電磁接触器３の自己保持回路は歩進用補助継
電器６の常閉接点６ｂ２から昇圧用カムスイッチ１０に
移る。また、歩進用カムスイッチ１１の閉動作により歩
進用補助継電器６が励磁され、その常開接点６ａ１の閉
路により自己保持回路が形成される。When the tap change is started, the step-up cam switch 10 and the step-up cam switch 11 close one after another, and the self-holding circuit of the step-up electromagnetic contactor 3 normally closes the step-up auxiliary relay 6. The operation moves from the contact 6b2 to the step-up cam switch 10. Further, the closing auxiliary switch 6 is excited by the closing operation of the stepping cam switch 11, and a self-holding circuit is formed by closing the normally open contact 6a1.
【００１５】さらに、タップ切換が進み、昇圧用カムス
イッチ１０、歩進用カムスイッチ１１が相次いで開動作
すると、昇圧用電磁接触器３の駆動コイル３Ｃの励磁が
解かれ、昇圧用電磁接触器３が開路し、電動機２が空転
する。Further, when the tap switching progresses and the step-up cam switch 10 and the step-up cam switch 11 successively open, the excitation of the drive coil 3C of the step-up electromagnetic contactor 3 is released, and the step-up electromagnetic contactor is released. 3 is opened, and the electric motor 2 idles.
【００１６】同時に昇圧用電磁接触器３の常開接点３ａ
２の開路によりブレーキ用電磁接触器５の駆動コイル５
Ｃも励磁が解かれ、常開接点５ａが開路すると共に常閉
接点５ｂが閉路することで、電動機２の各相の入力端を
通して短絡回路が形成され、電動機２に制動をかけて停
止させ、タップ切換が完了する。At the same time, the normally open contact 3a of the step-up electromagnetic contactor 3
2, the drive coil 5 of the electromagnetic contactor 5 for brake
As the excitation is also released, the normally open contact 5a is opened and the normally closed contact 5b is closed, so that a short circuit is formed through the input terminals of each phase of the motor 2, and the motor 2 is braked and stopped. Tap switching is completed.
【００１７】また、ブレーキ用電磁接触器５の補助常開
接点５ａ−１の開路により、歩進用補助継電器６の励磁
も解かれ、次の指令信号を受付けることが可能となる。
以上は昇圧時のタップ切換操作であるが、降圧時のタッ
プ切換操作も前述と同様に行われるので、ここではその
説明を省略する。When the auxiliary normally open contact 5a-1 of the electromagnetic contactor 5 for brake is opened, the excitation of the auxiliary relay 6 for stepping is released, and the next command signal can be received.
The above is the tap switching operation at the time of step-up, but the tap switching operation at the time of step-down is performed in the same manner as described above, and the description thereof is omitted here.
【００１８】[0018]
【発明が解決しようとする課題】ところで、このような
従来の負荷時タップ切換装置は、図６に示すような電動
操作機構と組合せた構成によりタップ切換が行われてい
る。即ち、図６に示すように変圧器６１のタンク上面に
負荷時タップ切換器６０が設けられ、またタンク側面に
図５に示すような操作回路を内蔵した電動操作機構６３
を設け、これら負荷時タップ切換器６０と電動操作機構
６３との間を伝導軸６２により連結する構成となってい
る。この場合、負荷時タップ切換器６０及び電動操作機
構６３にはそれぞれタップ位置やタップ操作位置並びに
状態を確認するための表示部が備えられている。Incidentally, in such a conventional tap change device under load, tap change is performed by a structure combined with an electric operation mechanism as shown in FIG. That is, as shown in FIG. 6, an on-load tap changer 60 is provided on the upper surface of the tank of the transformer 61, and an electric operation mechanism 63 having a built-in operation circuit as shown in FIG.
And the connection between the on-load tap changer 60 and the electric operation mechanism 63 by the transmission shaft 62 is provided. In this case, the on-load tap changer 60 and the electric operation mechanism 63 are provided with a display unit for confirming the tap position, the tap operation position, and the state, respectively.
【００１９】しかし、このような構成の負荷時タップ切
換装置において、工場等で負荷時タップ切換器６０と電
動操作機構６３とを組立てた後、現地点検の際に切換動
作状況を確認するには、変圧器のタンク上面側で負荷時
タップ切換器６０の動作状況の確認とタンク側面側の電
動操作機構６３で操作指令を出す２人の作業者が必要と
なるため、作業者に対する負担がかかると共に、作業効
率が悪いという問題があった。However, in the on-load tap changer having such a configuration, after assembling the on-load tap changer 60 and the electric operating mechanism 63 at a factory or the like, it is necessary to confirm the switching operation state at the time of on-site inspection. It is necessary to check the operation status of the tap changer 60 at the time of loading on the upper surface side of the transformer and to issue an operation command by the electric operation mechanism 63 on the side surface of the tank. In addition, there was a problem that work efficiency was poor.
【００２０】また、従来の操作回路では負荷時タップ切
換装置の点検及び調整時に負荷時タップ切換器を歩進動
作させようとしても、１タップ間の切換調整ができない
ため、作業者のハンドル操作によってタップ切換を小刻
みに動作させなくてはならず、多大な時間と労力を要し
ていた。Further, in the conventional operation circuit, even if the on-load tap changer is operated step by step when checking and adjusting the on-load tap changer, the changeover between one tap cannot be adjusted. The tap switching had to be operated in small increments, which required a great deal of time and effort.
【００２１】本発明は上記のような問題を解決するため
なされたもので、タップ切換動作の確認の際、単独で行
うことが可能となり、しかも歩進動作による点検や調整
を簡単且つ容易に行うことができる作業効率の良い負荷
時タップ切換装置を提供することを目的とする。The present invention has been made to solve the above-described problems, and it is possible to perform tap switching operation independently by checking it, and to perform inspection and adjustment by a stepping operation simply and easily. It is an object of the present invention to provide an on-load tap switching device with high work efficiency that can be performed.
【００２２】[0022]
【課題を解決するための手段】本発明は上記の目的を達
成するため、次のような手段により負荷時タップ切換装
置を構成するものである。請求項１に対応する発明は、
交流電源と変圧器タップを切換えるタップ切換器を駆動
する電動機とを結ぶ主回路に設けられ、前記電動機の通
電方向を切換える昇圧用電磁接触器及び降圧用電磁接触
器と、前記主回路に設けられ、タップ切換終了時に前記
電動機の電源入力端を短絡して制動をかけるブレーキ用
電磁接触器と、前記昇圧用電磁接触器の駆動コイルを励
磁する励磁回路に設けられ、オン操作により前記昇圧用
電磁接触器を閉路して前記電動機を昇圧方向に駆動する
昇圧用押釦開閉器と、前記降圧用電磁接触器の駆動コイ
ルを励磁する励磁回路に設けられ、オン操作により前記
降圧用電磁接触器を閉路して前記電動機を降圧方向に駆
動する降圧用押釦開閉器と、前記電動機により前記タッ
プ切換器の歩進動作が終了すると動作して前記昇圧用電
磁接触器又は降圧用電磁接触器の駆動コイルを消磁する
歩進用補助継電器とを備え、前記昇圧用押釦開閉器及び
前記降圧用押釦開閉器の両端に昇圧用操作端子及び降圧
用操作端子をそれぞれ接続し、この昇圧用操作端子及び
降圧用操作端子にリード線を介して遠隔操作スイッチを
それぞれ接続する。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention constitutes a load tap switching device by the following means. The invention corresponding to claim 1 is:
An AC power supply and a step-up electromagnetic contactor and a step-down electromagnetic contactor that are provided in a main circuit that connects an electric motor that drives a tap changer that switches a transformer tap, and that is provided in the main circuit. A brake electromagnetic contactor for short-circuiting a power supply input terminal of the electric motor at the end of tap switching to provide braking, and an excitation circuit for exciting a drive coil of the boosting electromagnetic contactor, the boosting electromagnetic contactor being turned on to provide the boosting electromagnetic contactor. A step-up push-button switch for closing the contactor and driving the motor in the step-up direction; and an excitation circuit for exciting the drive coil of the step-down electromagnetic contactor, and closing the step-down electromagnetic contactor by an on operation. And a step-down push-button switch for driving the motor in the step-down direction, and the step-up electromagnetic contactor or the step-down switch which operates when the stepping operation of the tap changer is completed by the motor. A step-up auxiliary relay for demagnetizing the drive coil of the electromagnetic contactor, and a boosting operation terminal and a step-down operation terminal connected to both ends of the step-up pushbutton switch and the step-down pushbutton switch, respectively. Remote control switches are connected to the operation terminals for operation and the step-down operation terminals via lead wires, respectively.
【００２３】請求項２に対応する発明は、交流電源と変
圧器タップを切換えるタップ切換器を駆動する電動機と
を結ぶ主回路に設けられ、前記電動機の通電方向を切換
える昇圧用電磁接触器及び降圧用電磁接触器と、前記主
回路に設けられ、タップ切換終了時に前記電動機の電源
入力端を短絡して制動をかけるブレーキ用電磁接触器
と、前記昇圧用電磁接触器の駆動コイルを励磁する励磁
回路に設けられ、オン操作により前記昇圧用電磁接触器
を閉路して前記電動機を昇圧方向に駆動する昇圧用押釦
開閉器と、前記降圧用電磁接触器の駆動コイルを励磁す
る励磁回路に設けられ、オン操作により前記降圧用電磁
接触器を閉路して前記電動機を降圧方向に駆動する降圧
用押釦開閉器と、前記電動機により前記タップ切換器の
歩進動作が終了すると動作して前記昇圧用電磁接触器又
は降圧用電磁接触器の駆動コイルを消磁する歩進用補助
継電器とを備え、前記昇圧用押釦開閉器及び前記降圧用
押釦開閉器の両端に昇圧用操作端子及び降圧用操作端子
をそれぞれ接続し、この昇圧用操作端子及び降圧用操作
端子間に光、音、電波等による遠隔操作で開閉する接点
をそれぞれ設ける。According to a second aspect of the present invention, a step-up electromagnetic contactor is provided in a main circuit for connecting an AC power supply and a motor driving a tap changer for switching a transformer tap, and a step-up electromagnetic contactor for changing a current flowing direction of the motor. An electromagnetic contactor provided in the main circuit, a brake electromagnetic contactor for short-circuiting a power input terminal of the electric motor at the end of tap switching to apply braking, and an excitation for exciting a drive coil of the boosting electromagnetic contactor A step-up push-button switch for closing the step-up electromagnetic contactor by ON operation to drive the electric motor in a step-up direction, and an excitation circuit for exciting a drive coil of the step-down electromagnetic contactor. A step-down push-button switch that closes the step-down electromagnetic contactor and drives the motor in the step-down direction by an ON operation; and the stepping operation of the tap changer is completed by the motor. A step-up auxiliary relay that operates to demagnetize a drive coil of the step-up electromagnetic contactor or the step-down electromagnetic contactor, and a step-up operation terminal at both ends of the step-up push-button switch and the step-down push-button switch. And a step-down operation terminal are connected to each other, and contacts are provided between the step-up operation terminal and the step-down operation terminal to be opened and closed by remote control using light, sound, radio waves, or the like.
【００２４】請求項３に対応する発明は、請求項２に対
応する発明において、昇圧用操作端子及び降圧用操作端
子間に設けられる接点は、有線リモコンによる遠隔操作
で開閉させる。According to a third aspect of the present invention, in the invention according to the second aspect, a contact provided between the step-up operation terminal and the step-down operation terminal is opened and closed by a remote control using a wired remote controller.
【００２５】従って、上記請求項１乃至請求項３に対応
する発明の負荷時タップ切換装置にあっては、昇圧用押
釦開閉器及び降圧用押釦開閉器にそれぞれ昇圧用操作端
子及び降圧用操作端子を通して並列に接続された接点を
遠隔操作により開閉して電動操作による変圧器タップを
切換ることができるので、作業者は単独でタップ切換の
動作確認を容易に行なうことが可能となる。Therefore, in the load tap switching device according to the present invention corresponding to the first to third aspects, the step-up push-button switch and the step-down push-button switch are respectively provided with a step-up operation terminal and a step-down operation terminal. , The contacts connected in parallel can be opened and closed by remote control to switch the transformer tap by electric operation, so that the operator can easily confirm the operation of the tap switching alone.
【００２６】請求項４に対応する発明は、交流電源と変
圧器タップを切換えるタップ切換器を駆動する電動機と
を結ぶ主回路に設けられ、前記電動機の通電方向を切換
える昇圧用電磁接触器及び降圧用電磁接触器と、前記主
回路に設けられ、タップ切換終了時に前記電動機の電源
入力端を短絡して制動をかけるブレーキ用電磁接触器
と、前記昇圧用電磁接触器の駆動コイルを励磁する励磁
回路に設けられ、オン操作により前記駆動コイルを励磁
すると共に自己保持接点により自己保持回路を形成し、
前記昇圧用電磁接触器を閉路して前記電動機を昇圧方向
に駆動する昇圧用押釦開閉器と、前記降圧用電磁接触器
の駆動コイルを励磁する励磁回路に設けられ、オン操作
により前記駆動コイルを励磁すると共に自己保持接点に
より自己保持回路を形成し、前記降圧用電磁接触器を閉
路して前記電動機を降圧方向に駆動する降圧用押釦開閉
器と、前記電動機により前記タップ切換器の歩進動作が
終了すると動作して前記昇圧用電磁接触器又は降圧用電
磁接触器の駆動コイルを消磁する歩進用補助継電器とを
備え、前記昇圧用電磁接触器及び前記降圧用電磁接触器
の駆動コイルを励磁する励磁回路の自己保持接点に直列
に第１の接点をそれぞれ接続すると共に、これら自己保
持接点と第１の接点の直列回路に並列に第２の接点をそ
れぞれ接続し、前記第２の接点がオンの時前記第１の接
点がオフとなるように操作する。According to a fourth aspect of the present invention, a step-up electromagnetic contactor is provided in a main circuit for connecting an AC power supply and a motor driving a tap changer for switching a transformer tap, and a step-up electromagnetic contactor for switching a current flowing direction of the motor. An electromagnetic contactor provided in the main circuit, a brake electromagnetic contactor for short-circuiting a power input terminal of the electric motor at the end of tap switching to apply braking, and an excitation for exciting a drive coil of the boosting electromagnetic contactor Provided in the circuit, to excite the drive coil by an on operation and form a self-holding circuit by self-holding contacts,
A step-up push-button switch for closing the step-up electromagnetic contactor to drive the electric motor in the step-up direction, and an excitation circuit for exciting the drive coil of the step-down electromagnetic contactor are provided. A step-down push-button switch that excites and forms a self-holding circuit with self-holding contacts, closes the step-down electromagnetic contactor and drives the motor in a step-down direction, and a step-up operation of the tap changer by the motor. When the step is completed, the step-up electromagnetic contactor or step-up auxiliary relay for degaussing the drive coil of the step-down electromagnetic contactor is provided, and the drive coil of the step-up electromagnetic contactor and the step-down electromagnetic contactor is provided. A first contact is connected in series to a self-holding contact of an exciting circuit to be excited, and a second contact is connected in parallel to a series circuit of the self-holding contact and the first contact, respectively. Second contact said first contact when the ON is operated to be turned off.
【００２７】請求項５に対応する発明は、請求項４に対
応する発明において、第１の接点及び第２の接点は、有
線リモコンによる遠隔操作で開閉させる。従って、請求
項４及び請求項５に対応する発明の負荷時タップ切換装
置にあっては、第１の接点と第２の接点をオン、オフ切
換動作させることにより、タップの切換動作を小刻みす
ることができるので、１タップ間の切換調整を簡単、且
つ容易に行なうことができる。According to a fifth aspect of the present invention, in the first aspect of the present invention, the first contact and the second contact are opened and closed by remote control using a wired remote controller. Therefore, in the on-load tap switching device according to the fourth and fifth aspects of the present invention, the first contact and the second contact are turned on and off to perform the tap switching operation little by little. Therefore, the switching adjustment between one tap can be performed simply and easily.
【００２８】請求項６に対応する発明は、交流電源と変
圧器タップを切換えるタップ切換器を駆動する電動機と
を結ぶ主回路に設けられ、前記電動機の通電方向を切換
える昇圧用電磁接触器及び降圧用電磁接触器と、前記主
回路に設けられ、タップ切換終了時に前記電動機の電源
入力端を短絡して制動をかけるブレーキ用電磁接触器
と、前記昇圧用電磁接触器の駆動コイルを励磁する励磁
回路に設けられ、オン操作により前記駆動コイルを励磁
すると共に自己保持接点により自己保持回路を形成し、
前記昇圧用電磁接触器を閉路して前記電動機を昇圧方向
に駆動する昇圧用押釦開閉器と、前記降圧用電磁接触器
の駆動コイルを励磁する励磁回路に設けられ、オン操作
により前記駆動コイルを励磁すると共に自己保持接点に
より自己保持回路を形成し、前記降圧用電磁接触器を閉
路して前記電動機を降圧方向に駆動する降圧用押釦開閉
器と、前記電動機により前記タップ切換器の歩進動作が
終了すると動作して前記昇圧用電磁接触器又は降圧用電
磁接触器の駆動コイルを消磁する歩進用補助継電器とを
備え、前記昇圧用押釦開閉器及び前記降圧用押釦開閉器
の両端に昇圧用操作端子及び降圧用操作端子をそれぞれ
接続し、この昇圧用操作端子及び降圧用操作端子間に
光、音、電波等による遠隔操作で開閉する接点をそれぞ
れ設け、且つ前記昇圧用電磁接触器及び前記降圧用電磁
接触器の駆動コイルを励磁する励磁回路の自己保持接点
に直列に第１の接点をそれぞれ接続すると共に、これら
自己保持接点と第１の接点の直列回路に並列に第２の接
点をそれぞれ接続し、有線リモコンによる遠隔操作で前
記第２の接点がオンの時前記第１の接点がオフとなるよ
うに操作して前記変圧器タップを切換る。[0028] The invention corresponding to claim 6 is provided in a main circuit connecting an AC power supply and a motor driving a tap changer for switching a transformer tap, and includes a step-up electromagnetic contactor and a step-down electromagnetic switch for switching a current supply direction of the motor. An electromagnetic contactor provided in the main circuit, a brake electromagnetic contactor for short-circuiting a power input terminal of the electric motor at the end of tap switching to apply braking, and an excitation for exciting a drive coil of the boosting electromagnetic contactor Provided in the circuit, to excite the drive coil by an on operation and form a self-holding circuit by self-holding contacts,
A step-up push-button switch for closing the step-up electromagnetic contactor to drive the electric motor in the step-up direction, and an excitation circuit for exciting the drive coil of the step-down electromagnetic contactor are provided. A step-down push-button switch that excites and forms a self-holding circuit with self-holding contacts, closes the step-down electromagnetic contactor and drives the motor in a step-down direction, and a step-up operation of the tap changer by the motor. And an auxiliary auxiliary relay for deactivating the drive coil of the step-up electromagnetic contactor or the step-down electromagnetic contactor when the operation is completed, and a step-up switch is provided at both ends of the step-up push-button switch and the step-down push-button switch. The operation terminal and the step-down operation terminal are connected to each other, and contacts are provided between the step-up operation terminal and the step-down operation terminal to be opened and closed by remote control using light, sound, radio waves, or the like. First contacts are connected in series to self-holding contacts of an exciting circuit for exciting the drive coil of the electromagnetic contactor and the step-down electromagnetic contactor, and are connected in parallel to a series circuit of these self-holding contacts and the first contact. , And the transformer taps are switched by remote control by a wired remote controller so that the first contacts are turned off when the second contacts are turned on.
【００２９】従って、請求項６に対応する発明の負荷時
タップ切換装置にあっては、単独作業者による遠隔操作
で電動操作により変圧器タップを切換ることができる
と、同時に１タップ間の切換調整を簡単、且つ容易に行
なうことができる。Therefore, in the load tap switching device according to the invention, when the transformer tap can be switched by electric operation by a remote operation by a single operator, the switching between one tap at the same time. Adjustment can be performed easily and easily.
【００３０】[0030]
【発明の実施の形態】以下本発明の実施の形態を図面を
参照して説明する。図１は本発明による負荷時タップ切
換装置の第１の実施の形態を示す電動操作回路図であ
り、図５と同一部品には同一符号を付して示す。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an electric operation circuit diagram showing a first embodiment of the on-load tap switching device according to the present invention, and the same parts as those in FIG. 5 are denoted by the same reference numerals.
【００３１】図１において、２は変圧器のタップ切換器
を操作する電動機で、この電動機２はブレーキ用電磁接
触器５の常開接点５ａ、昇圧用電磁接触器３、昇圧用制
限開閉器８、開閉器７及びしゃ断器１を直列に介して３
相交流電源のＵ相、Ｖ相、Ｗ相の各入力端子１４，１
５，１６にそれぞれ接続されている。また、昇圧用電磁
接触器３に２つの相を入替えて逆並列に降圧用電磁接触
器４と降圧用制限開閉器９とが直列接続されている。さ
らに、ブレーキ用電磁接触器５の常閉接点５ｂが電動機
２の各相間に閉回路が形成されるように接続されてい
る。In FIG. 1, reference numeral 2 denotes a motor for operating a tap changer of a transformer. The motor 2 includes a normally open contact 5a of an electromagnetic contactor 5 for brake, an electromagnetic contactor 3 for boosting, and a limit switch 8 for boosting. , The switch 7 and the circuit breaker 1
Input terminals 14, 1 for the U-phase, V-phase, and W-phase of the three-phase AC power supply
5 and 16, respectively. Also, two phases are exchanged in the step-up electromagnetic contactor 3, and the step-down electromagnetic contactor 4 and the step-down limiting switch 9 are connected in series in anti-parallel. Further, the normally closed contact 5b of the electromagnetic contactor 5 for brake is connected so that a closed circuit is formed between the phases of the electric motor 2.
【００３２】上記しゃ断器１はその開閉に連動する補助
常開接点１ａ１，１ａ２とトリップコイルＴＣとを備
え、補助常開接点１ａ１の一端はトリップコイルＴＣを
介して外部接続端子１７に接続され、補助常開接点１ａ
１の他端はＷ相に対応する開閉器７と制限開閉器８との
接続間に接続されると共に操作回路の電源線Ｂ２に接続
されている。また、外部接続端子１７にはトリップコイ
ル用押釦スイッチ２５の一端が接続され、その他端はＵ
相に対応する開閉器７と制限開閉器８との接続間に接続
されると共に外部接続端子２０及び操操作回路の電源線
Ｂ１にそれぞれ接続されている。さらに、補助常開接点
１ａ２は外部接続端子１８，１９に接続されている。The circuit breaker 1 has auxiliary normally open contacts 1a1 and 1a2 interlocked with its opening and closing and a trip coil TC. One end of the auxiliary normally open contact 1a1 is connected to an external connection terminal 17 via a trip coil TC. Auxiliary normally open contact 1a
The other end of the switch 1 is connected between the connection between the switch 7 corresponding to the W phase and the limit switch 8 and also connected to the power supply line B2 of the operation circuit. One end of a trip coil push button switch 25 is connected to the external connection terminal 17, and the other end is
It is connected between the connection between the switch 7 and the limit switch 8 corresponding to the phase, and is also connected to the external connection terminal 20 and the power supply line B1 of the operation circuit. Further, the auxiliary normally open contact 1a2 is connected to the external connection terminals 18 and 19.
【００３３】一方、３Ｃは昇圧用電磁接触器３の駆動コ
イルで、この駆動コイル３Ｃの一端は降圧用電磁接触器
４の補助常閉接点４ｂ、昇圧用制限開閉器８ｂ１、歩進
用補助継電器６の常閉接点６ｂ１及び昇圧用制限開閉器
８ｂ２を直列接続して外部接続端子２１に接続すると共
に、昇圧用押釦スイッチ１２ａ及び昇圧用開閉器１３ｂ
を直列に介して外部接続端子２３に接続されている。On the other hand, 3C is a drive coil of the step-up electromagnetic contactor 3, and one end of the drive coil 3C has an auxiliary normally closed contact 4b of the step-down electromagnetic contactor 4, a step-up limiting switch 8b1, an auxiliary step relay. 6, the normally closed contact 6b1 and the step-up limiting switch 8b2 are connected in series and connected to the external connection terminal 21, and the step-up push button switch 12a and the step-up switch 13b
Are connected to the external connection terminal 23 in series.
【００３４】また、昇圧用制限開閉器８ｂ１と歩進用補
助継電器６の常閉接点６ｂ１との接続間に昇圧用電磁接
触器３の自己保持用の補助常開接点３ａ１の一端が接続
され、その他端は歩進用補助継電器６の常閉接点６ｂ２
及び昇圧用カムスイッチ１０を並列回路を介して操作回
路の一方の電源線Ｂ１に接続されている。One end of a self-holding auxiliary normally open contact 3a1 of the boosting electromagnetic contactor 3 is connected between the connection between the boosting limit switch 8b1 and the normally closed contact 6b1 of the step auxiliary relay 6, The other end is a normally closed contact 6b2 of the auxiliary relay 6 for stepping.
The boosting cam switch 10 is connected to one power supply line B1 of the operation circuit via a parallel circuit.
【００３５】６は歩進用補助継電器で、この歩進用補助
継電器６の一端はブレーキ用電磁接触器５の常開補助接
点５ａ−１及び歩進用カムスイッチ１１を直列にして操
作回路の電源線Ｂ１に接続されると共に、歩進用補助継
電器６の常開接点６ａ１を介して昇圧用制限開閉器８ｂ
２と歩進用補助継電器６の常閉接点６ｂ１との接続間に
接続され、歩進用補助継電器６の他端は操作回路の電源
線Ｂ２に接続されている。また、常開補助接点５ａ−１
及び歩進用カムスイッチ１１の直列回路に並列にブレー
キ用電磁接触器５の常開補助接点５ａ−２と歩進用補助
継電器６の常開接点６ａ２を直列接続されている。Reference numeral 6 denotes a step auxiliary relay. One end of the step auxiliary relay 6 has an normally open auxiliary contact 5a-1 of the electromagnetic contactor 5 for brake and a step cam switch 11 connected in series to operate an operation circuit. It is connected to the power supply line B1, and via the normally open contact 6a1 of the auxiliary relay 6 for stepping up, the voltage limiting switch 8b
2 and the normally closed contact 6b1 of the auxiliary auxiliary relay 6 are connected, and the other end of the auxiliary auxiliary relay 6 is connected to a power supply line B2 of an operation circuit. The normally open auxiliary contact 5a-1
The normally open auxiliary contact 5a-2 of the electromagnetic contactor 5 for brake and the normally open contact 6a2 of the auxiliary relay 6 for stepping are connected in series with the series circuit of the stepping cam switch 11.
【００３６】さらに、４Ｃは降圧用電磁接触器４の駆動
コイルで、この駆動コイル４Ｃの一端は昇圧用電磁接触
器３の補助常閉接点３ｂ、降圧用制限開閉器９ｂ１、歩
進用補助継電器６の常閉接点６ｂ２及び降圧用制限開閉
器９ｂ２を直列にして外部接続端子２２に接続されると
共に、降圧用押釦開閉器１３ａ及び１２ｂを直列に介し
て外部接続端子２３に接続され、その他端は操作回路の
電源線Ｂ２に接続されている。また、歩進用補助継電器
６の常閉接点６ｂ２と降圧用制限開閉器９ｂ２との接続
端に歩進用補助継電器６の常開接点６ａ３の一端を接続
し、その他端は歩進用補助継電器６の一端に接続されて
いる。Reference numeral 4C denotes a drive coil of the step-down electromagnetic contactor 4. One end of the drive coil 4C has an auxiliary normally closed contact 3b of the step-up electromagnetic contactor 3, a step-down limiting switch 9b1, and a step-up auxiliary relay. 6, the normally closed contact 6b2 and the step-down limiting switch 9b2 are connected in series to the external connection terminal 22, and connected to the external connection terminal 23 through the step-down pushbutton switches 13a and 12b in series. Is connected to the power supply line B2 of the operation circuit. One end of a normally open contact 6a3 of the auxiliary auxiliary relay 6 is connected to a connection end of the normally closed contact 6b2 of the auxiliary auxiliary relay 6 and the step-down limiting switch 9b2, and the other end is an auxiliary auxiliary relay for stepping. 6 is connected to one end.
【００３７】また、降圧用制限開閉器９ｂ１と歩進用補
助継電器６の常閉接点６ｂ２との接続間に自己保持用の
常開接点４ａ１の一端が接続され、その他端は昇圧用電
磁接触器３の自己保持用の補助常開接点３ａ１と歩進用
カムスイッチ１０との接続間に接続される。One end of a self-holding normally open contact 4a1 is connected between the step-down limiting switch 9b1 and the normally closed contact 6b2 of the step auxiliary relay 6, and the other end is a step-up electromagnetic contactor. 3 is connected between the connection between the self-holding auxiliary normally open contact 3a1 and the stepping cam switch 10.
【００３８】さらに、５Ｃはブレーキ用電磁接触器の駆
動コイルで、この駆動コイル５Ｃの一端は昇圧用電磁接
触器３の補助常開接点３ａ２と降圧用電磁接触器４の常
開接点４ａ２の並列回路を介して操作回路の電源線Ｂ１
に接続され、その他端は操作回路の電源線Ｂ２に接続さ
れる。5C is a drive coil of the electromagnetic contactor for brake. One end of the drive coil 5C is connected in parallel with the auxiliary normally open contact 3a2 of the step-up electromagnetic contactor 3 and the normally open contact 4a2 of the step-down electromagnetic contactor 4. Power line B1 of the operation circuit through the circuit
And the other end is connected to the power supply line B2 of the operation circuit.
【００３９】なお、歩進用補助継電器６の一端に常開接
点６ａ４を直列に介して外部接続端子２４に接続されて
いる。このような構成の電動操作回路において、第１の
実施の形態では昇圧用押釦開閉器１２ａの両端に昇圧用
操作端子３０，３１を接続し、この昇圧用操作端子３
０，３１に図示しないリード線を介して遠隔操作スイッ
チを接続するものである。また、同様に降圧用押釦開閉
器１３ａの両端に降圧用操作端子３２，３３を接続し、
この降圧用操作端子３２，３３を図示しないリード線を
介して遠隔操作スイッチを接続するものである。Incidentally, one end of the auxiliary auxiliary relay 6 is connected to an external connection terminal 24 via a normally open contact 6a4 in series. In the electric operating circuit having such a configuration, in the first embodiment, the boosting operation terminals 30 and 31 are connected to both ends of the boosting push-button switch 12a.
A remote control switch is connected to 0 and 31 via a lead wire (not shown). Similarly, step-down operation terminals 32 and 33 are connected to both ends of the step-down push-button switch 13a, respectively.
The step-down operation terminals 32 and 33 are connected to remote control switches via lead wires (not shown).
【００４０】ここで、上記外部接続端子２０を電源基準
端子として外部接続端子２１との間、外部接続端子２２
との間、外部接続端子２３との間に図示しない操作スイ
ッチを介して適宜選択的に接続可能になっている。ま
た、外部接続端子１８，１９にはしゃ断器動作確認回路
が接続され、外部接続端子２４には表示回路が接続され
ている。The external connection terminal 20 is used as a power supply reference terminal between the external connection terminal 21 and the external connection terminal 22.
And the external connection terminal 23 can be selectively connected as appropriate via an operation switch (not shown). A circuit breaker operation check circuit is connected to the external connection terminals 18 and 19, and a display circuit is connected to the external connection terminal 24.
【００４１】次に上記のように構成された電動操作回路
の作用を述べる。いま外部接続端子２０及び２３間を図
示しない操作スイッチにより短絡した状態で昇圧用操作
端子３０，３１に接続された図示しない遠隔操作スイッ
チをオン操作すると、昇圧用押釦開閉器１２ａの短絡回
路が形成され、操作回路の電源線Ｂ１，Ｂ２が三相交流
電源回路のＵ相とＷ相に接続された状態となる。Next, the operation of the electric operation circuit configured as described above will be described. When a remote control switch (not shown) connected to the boost operation terminals 30 and 31 is turned on in a state where the external connection terminals 20 and 23 are short-circuited by an operation switch (not shown), a short circuit of the push button switch 12a for boost is formed. Then, the power lines B1 and B2 of the operation circuit are connected to the U and W phases of the three-phase AC power circuit.
【００４２】すると、昇圧用電磁接触器の駆動コイル３
Ｃが励磁され、昇圧用電磁接触器３が閉路すると同時に
その補助常開接点３ａ１，３ａ２が閉路すると共に、補
助常開接点３ｂが開路する。補助常開接点３ａ２が閉路
すると、ブレーキ用電磁接触器５の駆動コイル５Ｃが励
磁され、その常閉接点５ａが閉路すると共に、常閉接点
５ｂが開路する。同時にブレーキ用電磁接触器５の補助
常開接点５ａ−１，５ａ−２も閉路する。Then, the drive coil 3 of the step-up electromagnetic contactor
C is excited, the boosting electromagnetic contactor 3 is closed, and at the same time, the auxiliary normally open contacts 3a1 and 3a2 are closed, and the auxiliary normally open contact 3b is opened. When the auxiliary normally open contact 3a2 is closed, the drive coil 5C of the electromagnetic contactor 5 for brake is excited, and the normally closed contact 5a is closed and the normally closed contact 5b is opened. At the same time, the auxiliary normally open contacts 5a-1, 5a-2 of the electromagnetic contactor 5 for brake also close.
【００４３】従って、電動機２の短絡回路が開放され、
三相の電源回路が通電されることにより電動機２は昇圧
方向に回転し、タップの切換動作が開始される。このと
き昇圧用電磁接触器３はその常開接点３ａ１と歩進用補
助継電器６の常閉接点６ｂ２により自己保持回路が形成
される。Accordingly, the short circuit of the electric motor 2 is opened,
When the three-phase power supply circuit is energized, the motor 2 rotates in the boosting direction, and the tap switching operation is started. At this time, a self-holding circuit is formed by the normally open contact 3a1 of the step-up electromagnetic contactor 3 and the normally closed contact 6b2 of the auxiliary auxiliary relay 6 for stepping.
【００４４】タップ切換が開始されると、昇圧用カムス
イッチ１０、歩進用カムスイッチ１１が相次いで閉動作
し、昇圧用電磁接触器３の自己保持回路は歩進用補助継
電器６の常閉接点６ｂ２から昇圧用カムスイッチ１０に
移る。また、歩進用カムスイッチ１１の閉動作により歩
進用補助継電器６が励磁され、その常開接点６ａ１の閉
路により自己保持回路が形成される。When the tap switching is started, the step-up cam switch 10 and the step-up cam switch 11 close one after another, and the self-holding circuit of the step-up electromagnetic contactor 3 normally closes the step-up auxiliary relay 6. The operation moves from the contact 6b2 to the step-up cam switch 10. Further, the closing auxiliary switch 6 is excited by the closing operation of the stepping cam switch 11, and a self-holding circuit is formed by closing the normally open contact 6a1.
【００４５】さらに、タップ切換が進み、昇圧用カムス
イッチ１０、歩進用カムスイッチ１１が相次いで開動作
すると、昇圧用電磁接触器３の駆動コイル３Ｃの励磁が
解かれ、昇圧用電磁接触器３が開路し、電動機２が空転
する。Further, when the tap switching progresses and the step-up cam switch 10 and the step-up cam switch 11 successively open, the excitation of the drive coil 3C of the step-up electromagnetic contactor 3 is released, and the step-up electromagnetic contactor is released. 3 is opened, and the electric motor 2 idles.
【００４６】同時に昇圧用電磁接触器３の常開接点３ａ
２の開路によりブレーキ用電磁接触器５の駆動コイル５
Ｃの励磁が解かれ、常開接点５ａが開路すると共に常閉
接点５ｂが閉路することで、電動機２の各相の入力端を
通して短絡回路が形成され、電動機２に制動をかけて停
止させ、タップ切換が完了する。At the same time, the normally open contact 3a of the step-up electromagnetic contactor 3
2, the drive coil 5 of the electromagnetic contactor 5 for brake
When the excitation of C is released, the normally open contact 5a is opened and the normally closed contact 5b is closed, a short circuit is formed through the input terminals of each phase of the motor 2, and the motor 2 is braked and stopped. Tap switching is completed.
【００４７】また、ブレーキ用電磁接触器５の補助常開
接点５ａ−１の開路により、歩進用補助継電器６の励磁
も解かれ、次の指令信号を受付けることが可能となる。
以上は昇圧時のタップ切換操作であるが、降圧時のタッ
プ切換操作も前述と同様に行われるので、ここではその
説明を省略する。Further, by the opening of the auxiliary normally open contact 5a-1 of the electromagnetic contactor 5 for brake, the excitation of the auxiliary relay 6 for stepping is released, and the next command signal can be received.
The above is the tap switching operation at the time of step-up, but the tap switching operation at the time of step-down is performed in the same manner as described above, and the description thereof is omitted here.
【００４８】このように第１の実施の形態では、昇圧用
押釦開閉器１２ａ及び降圧用押釦開閉器１３ａの両端に
昇圧用操作端子３０，３１及び降圧用操作端子３２，３
３をそれぞれ接続してこれら各端子に図示しないリード
線を介して接続された遠隔操作スイッチをオン操作する
ことにより、昇圧用押釦開閉器１２ａ及び降圧用押釦開
閉器１３ａを閉路したときと同様の通電回路が形成され
るので、作業者は図６の変圧器タンクの上面側から負荷
時タップ切換器の切換状態を確認しながら電動操作回路
の操作を行うことができる。従って、単独作業者でタッ
プの切換動作の確認を簡単且つ容易に行うことができ、
作業効率を向上させることができる。As described above, in the first embodiment, the operation terminals 30, 31 and the operation terminals 32, 3 are provided at both ends of the step-up switch 12a and the step-down switch 13a.
3 is connected to each terminal and a remote control switch connected to each of these terminals via a lead wire (not shown) is turned on, so that the push-button switch 12a for boosting and the push-button switch 13a for step-down are closed. Since the energization circuit is formed, the operator can operate the electric operation circuit while checking the switching state of the on-load tap changer from the upper surface side of the transformer tank in FIG. Therefore, a single operator can easily and easily confirm the tap switching operation,
Work efficiency can be improved.
【００４９】図２は本発明による負荷時タップ切換装置
の第２の実施の形態を示す電動操作回路図であり、図１
と同一部品には同一符号を付してその説明を省略し、こ
こでは異なる部分について述べる。FIG. 2 is an electric operation circuit diagram showing a second embodiment of the on-load tap switching device according to the present invention.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Here, different parts will be described.
【００５０】第２の実施の形態では、昇圧用操作端子３
０，３１間及び３２，３３間に光、音、電波等による遠
隔操作で開閉する接点４０，４１を接続するものであ
る。このような構成としても第１の実施の形態と全く同
様の作用の効果を得ることができる。In the second embodiment, the boosting operation terminal 3
Contacts 40 and 41 which are opened and closed by remote control using light, sound, radio waves or the like are connected between 0 and 31 and between 32 and 33. With such a configuration, it is possible to obtain the same operation and effect as those of the first embodiment.
【００５１】また、第２の実施の形態において、上記と
同様の接点４０，４１を負荷時タップ切換器付近（図示
せず）に取付け、これらの接点４０，４１を有線のリモ
コンで開閉させることにより、電動操作機構と負荷時タ
ップ切換器のタップの切換を同時に確認できるようにし
ても良い。In the second embodiment, the same contacts 40 and 41 as those described above are attached near the load tap changer (not shown), and these contacts 40 and 41 are opened and closed by a wired remote controller. Thereby, the switching of the tap of the electric operation mechanism and the tap changer at the time of load may be simultaneously confirmed.
【００５２】図３は本発明による負荷時タップ切換装置
の第３の実施の形態を示す電動操作回路図であり、図５
と同一部品には同一符号を付してその説明を省略し、こ
こでは異なる部分について述べる。FIG. 3 is an electric operation circuit diagram showing a third embodiment of the on-load tap switching device according to the present invention.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Here, different parts will be described.
【００５３】第３の実施の形態では、昇圧用電磁接触器
３の励磁回路の自己保持用補助常開接点３ａ１と直列に
第１の接点５０を接続し、この補助常開接点３ａ１及び
第１の接点５０の直列回路に並列に第２の接点５２を接
続し、これら第１の接点５０及び第２の接点５２を有線
リモコンの遠隔操作によりオン、オフするようにしたも
のである。In the third embodiment, the first contact 50 is connected in series with the self-holding auxiliary normally open contact 3a1 of the excitation circuit of the step-up electromagnetic contactor 3, and the auxiliary normally open contact 3a1 and the first A second contact 52 is connected in parallel to a series circuit of the contacts 50, and the first contact 50 and the second contact 52 are turned on and off by remote operation of a wired remote controller.
【００５４】また、降圧用電磁接触器４の励磁回路の自
己保持用補助常開接点４ａ１に直列に第１の接点５１を
接続し、この補助常開接点４ａ１及び第１の接点５１の
直列回路に並列に第２の接点５３を接続し、これら第１
の接点５１及び第２の接点５４を有線リモコンの遠隔操
作によりオン、オフするようにしたものである。The first contact 51 is connected in series to the self-holding auxiliary normally open contact 4a1 of the excitation circuit of the step-down electromagnetic contactor 4, and a series circuit of the auxiliary normally open contact 4a1 and the first contact 51 is connected. , A second contact 53 is connected in parallel to
Are turned on and off by remote control of a wired remote controller.
【００５５】このような構成の電動操作回路において、
昇圧の際に第２の接点５２をオンしたとき第１の接点５
０をオフし、つまり第２の接点５２のオンーオフの切換
に昇圧用電磁接触器３の駆動コイル３Ｃが励磁と消磁と
を繰返すことで、電動機２が間欠的に動作することにな
り、タップの切換動作が小刻みになる。In the electric operation circuit having such a configuration,
When the second contact 52 is turned on at the time of boosting, the first contact 5
0, that is, the drive coil 3C of the step-up electromagnetic contactor 3 repeats the excitation and the demagnetization for the on / off switching of the second contact 52, so that the electric motor 2 operates intermittently. The switching operation becomes small.
【００５６】また、降圧の際も第１の接点５１、第２の
接点５４をオンーオフする以外は昇圧時と同様である。
このような構成の電動操作回路とすれば、遠方から指令
を出すだけで工場組立時、現地点検時には負荷時タップ
切換装置及び電動操作機構のタップ切換動作が同時に確
認できる。The step-down operation is the same as the step-up operation except that the first contact 51 and the second contact 54 are turned on and off.
With the electric operation circuit having such a configuration, the tap switching operation of the on-load tap switching device and the electric operation mechanism can be simultaneously checked at the time of factory assembly and on-site inspection simply by issuing a command from a distance.
【００５７】図４は本発明による負荷時タップ切換装置
の第４の実施の形態を示す電動操作回路図であり、図２
と同一部品には同一符号を付してその説明を省略し、こ
こでは異なる部分について述べる。FIG. 4 is an electric operation circuit diagram showing a fourth embodiment of the on-load tap switching device according to the present invention.
The same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted. Here, different parts will be described.
【００５８】第４の実施の形態では、昇圧用電磁接触器
３の励磁回路の自己保持用の補助常開接点３ａ１に直列
に第１の接点５０を接続し、この補助常開接点３ａ１及
び第１の接点５０の直列回路に並列に第２の接点５２を
接続し、これら第１の接点５０及び第２の接点５２を有
線リモコンの遠隔操作によりオン、オフするようにした
ものである。In the fourth embodiment, the first contact 50 is connected in series to the auxiliary normally open contact 3a1 for self-holding of the excitation circuit of the step-up electromagnetic contactor 3, and the auxiliary normally open contact 3a1 A second contact 52 is connected in parallel to a series circuit of one contact 50, and the first contact 50 and the second contact 52 are turned on and off by remote control of a wired remote controller.
【００５９】また、降圧用電磁接触器４の励磁回路の自
己保持用の補助常開接点４ａ１に直列に第１の接点５１
を接続し、この補助常開接点４ａ１及び第１の接点５１
の直列回路に並列に第２の接点５３を接続し、これら第
１の接点５１及び第２の接点５４を有線リモコンの遠隔
操作によりオン、オフするようにしたものである。The first contact 51 is connected in series with the auxiliary normally open contact 4a1 for self-holding of the excitation circuit of the step-down electromagnetic contactor 4.
And the auxiliary normally open contact 4a1 and the first contact 51
A second contact 53 is connected in parallel to the series circuit of, and the first contact 51 and the second contact 54 are turned on and off by remote control of a wired remote controller.
【００６０】降圧時のタップ切換も前述同様に行うこと
ができる。このような構成の電動操作回路とすれば、有
線リモコンにより遠隔操作でタップ切換と１タップ切換
えを小刻みに切換える動作を交互にでき、負荷時タップ
切換装置の点検を速やかに確認することができる。The tap change at the time of step-down can be performed in the same manner as described above. With the electric operation circuit having such a configuration, the operation of tap switching and one-tap switching in small increments can be alternately performed by remote control using a wired remote controller, and the inspection of the on-load tap switching device can be promptly confirmed.
【００６１】[0061]
【発明の効果】以上述べたように本発明によれば、タッ
プ切換動作の確認の際、単独で行うことも可能となり、
しかも歩進動作による点検や調整を簡単且つ容易に行う
ことができる作業効率の良い負荷時タップ切換装置を提
供できる。As described above, according to the present invention, it is possible to perform the tap switching operation independently by checking it.
In addition, it is possible to provide an on-load tap switching device with high work efficiency, which can easily and easily perform inspection and adjustment by the stepping operation.
【図１】本発明による負荷時タップ切換装置の第１の実
施の形態を示す操作回路図。FIG. 1 is an operation circuit diagram showing a first embodiment of a load tap switching device according to the present invention.
【図２】本発明の第２の実施の形態を示す操作回路図。FIG. 2 is an operation circuit diagram showing a second embodiment of the present invention.
【図３】本発明の第３の実施の形態を示す操作回路図。FIG. 3 is an operation circuit diagram showing a third embodiment of the present invention.
【図４】本発明の第４の実施の形態を示す操作回路図。FIG. 4 is an operation circuit diagram showing a fourth embodiment of the present invention.
【図５】従来の負荷時タップ切換装置を示す電動操作回
路図。FIG. 5 is an electric operation circuit diagram showing a conventional on-load tap switching device.
【図６】変圧器に負荷時タップ切換装置と電動操作機構
とを設けた状態を示す構成図。FIG. 6 is a configuration diagram showing a state in which a transformer is provided with a tap switching device under load and an electric operation mechanism.
１……しゃ断器 ２……電動機 ３，４……昇圧、降圧用電磁接触器 ５……ブレーキ用電磁接触器 ６……歩進用補助継電器 ７……開閉器 ８，９……昇圧、降圧用制限開閉器 １０……昇圧用カムスイッチ １１……歩進用カムスイッチ １２，１３……昇圧、降圧用押釦開閉器 １４，１５，１６……三相交流電源のＵ相、Ｖ相、Ｗ相
の入力端子 １７〜２４……外部接続端子 ２５……押釦開閉器 ３０〜３３……遠隔操作端子 ４０，４１……昇圧、降圧用の接点 ５０，５１……第１の接点 ５２，５３……第２の接点DESCRIPTION OF SYMBOLS 1 ... Breaker 2 ... Electric motor 3, 4 ... Electromagnetic contactor for step-up and step-down 5 ... Electromagnetic contactor for brake 6 ... Auxiliary relay for step-by-step 7 ... Switch 8 and 9 ... Step-up and step-down Limit switch 10 for boosting ... Cam switch for boosting 11 ... Cam switch for step-up 12,13 ... Pushbutton switch for step-up / step-down 14,15,16 ... U-phase, V-phase, W of three-phase AC power supply Phase input terminals 17 to 24 External connection terminals 25 Pushbutton switches 30 to 33 Remote control terminals 40 and 41 Step-up and step-down contacts 50 and 51 First contacts 52 and 53 ... Second contact
Claims (6)
プ切換器を駆動する電動機とを結ぶ主回路に設けられ、
前記電動機の通電方向を切換える昇圧用電磁接触器及び
降圧用電磁接触器と、前記主回路に設けられ、タップ切
換終了時に前記電動機の電源入力端を短絡して制動をか
けるブレーキ用電磁接触器と、前記昇圧用電磁接触器の
駆動コイルを励磁する励磁回路に設けられ、オン操作に
より前記昇圧用電磁接触器を閉路して前記電動機を昇圧
方向に駆動する昇圧用押釦開閉器と、前記降圧用電磁接
触器の駆動コイルを励磁する励磁回路に設けられ、オン
操作により前記降圧用電磁接触器を閉路して前記電動機
を降圧方向に駆動する降圧用押釦開閉器と、前記電動機
により前記タップ切換器の歩進動作が終了すると動作し
て前記昇圧用電磁接触器又は降圧用電磁接触器の駆動コ
イルを消磁する歩進用補助継電器とを備え、 前記昇圧用押釦開閉器及び前記降圧用押釦開閉器の両端
に昇圧用操作端子及び降圧用操作端子をそれぞれ接続
し、この昇圧用操作端子及び降圧用操作端子にリード線
を介して遠隔操作スイッチをそれぞれ接続したことを特
徴とする負荷時タップ切換装置。1. A main circuit that connects an AC power supply and a motor that drives a tap changer that switches a transformer tap,
A step-up electromagnetic contactor and a step-down electromagnetic contactor for switching the direction of current supply to the motor, and a brake electromagnetic contactor that is provided in the main circuit and short-circuits a power input end of the motor at the end of tap switching to apply braking. A step-up push-button switch that is provided in an excitation circuit that excites a drive coil of the step-up electromagnetic contactor and closes the step-up electromagnetic contactor by on operation to drive the motor in the step-up direction; A step-down push-button switch provided in an excitation circuit for exciting a drive coil of the electromagnetic contactor and closing the step-down electromagnetic contactor by an on operation to drive the motor in a step-down direction; A step-up auxiliary relay that operates when the stepping operation of the step-up is completed and deactivates the drive coil of the step-up electromagnetic contactor or the step-down electromagnetic contactor. A step-up operation terminal and a step-down operation terminal are respectively connected to both ends of the step-down push-button switch, and a remote operation switch is connected to each of the step-up operation terminal and the step-down operation terminal via a lead wire. Under load tap changer.
プ切換器を駆動する電動機とを結ぶ主回路に設けられ、
前記電動機の通電方向を切換える昇圧用電磁接触器及び
降圧用電磁接触器と、前記主回路に設けられ、タップ切
換終了時に前記電動機の電源入力端を短絡して制動をか
けるブレーキ用電磁接触器と、前記昇圧用電磁接触器の
駆動コイルを励磁する励磁回路に設けられ、オン操作に
より前記昇圧用電磁接触器を閉路して前記電動機を昇圧
方向に駆動する昇圧用押釦開閉器と、前記降圧用電磁接
触器の駆動コイルを励磁する励磁回路に設けられ、オン
操作により前記降圧用電磁接触器を閉路して前記電動機
を降圧方向に駆動する降圧用押釦開閉器と、前記電動機
により前記タップ切換器の歩進動作が終了すると動作し
て前記昇圧用電磁接触器又は降圧用電磁接触器の駆動コ
イルを消磁する歩進用補助継電器とを備え、 前記昇圧用押釦開閉器及び前記降圧用押釦開閉器の両端
に昇圧用操作端子及び降圧用操作端子をそれぞれ接続
し、この昇圧用操作端子及び降圧用操作端子間に光、
音、電波等による遠隔操作で開閉する接点をそれぞれ設
けたことを特徴とする負荷時タップ切換装置。2. A main circuit that connects an AC power supply and a motor that drives a tap changer that switches a transformer tap,
A step-up electromagnetic contactor and a step-down electromagnetic contactor for switching the direction of current supply to the motor, and a brake electromagnetic contactor that is provided in the main circuit and short-circuits a power input end of the motor at the end of tap switching to apply braking. A step-up push-button switch that is provided in an excitation circuit that excites a drive coil of the step-up electromagnetic contactor and closes the step-up electromagnetic contactor by on operation to drive the motor in the step-up direction; A step-down push-button switch provided in an excitation circuit for exciting a drive coil of the electromagnetic contactor and closing the step-down electromagnetic contactor by an on operation to drive the motor in a step-down direction; A step-up auxiliary relay that operates when the stepping operation of the step-up is completed and deactivates the drive coil of the step-up electromagnetic contactor or the step-down electromagnetic contactor. A boost operation terminal and a step-down operation terminal are respectively connected to both ends of the step-down push-button switch, and light is applied between the step-up operation terminal and the step-down operation terminal.
An on-load tap switching device comprising a contact which is opened and closed by remote control using sound, radio waves or the like.
設けられる接点は、有線リモコンによる遠隔操作で開閉
させるようにしたことを特徴とする請求項２記載の負荷
時タップ切換装置。3. The on-load tap switching device according to claim 2, wherein a contact provided between the step-up operation terminal and the step-down operation terminal is opened and closed by a remote control using a wired remote controller.
プ切換器を駆動する電動機とを結ぶ主回路に設けられ、
前記電動機の通電方向を切換える昇圧用電磁接触器及び
降圧用電磁接触器と、前記主回路に設けられ、タップ切
換終了時に前記電動機の電源入力端を短絡して制動をか
けるブレーキ用電磁接触器と、前記昇圧用電磁接触器の
駆動コイルを励磁する励磁回路に設けられ、オン操作に
より前記駆動コイルを励磁すると共に自己保持接点によ
り自己保持回路を形成し、前記昇圧用電磁接触器を閉路
して前記電動機を昇圧方向に駆動する昇圧用押釦開閉器
と、前記降圧用電磁接触器の駆動コイルを励磁する励磁
回路に設けられ、オン操作により前記駆動コイルを励磁
すると共に自己保持接点により自己保持回路を形成し、
前記降圧用電磁接触器を閉路して前記電動機を降圧方向
に駆動する降圧用押釦開閉器と、前記電動機により前記
タップ切換器の歩進動作が終了すると動作して前記昇圧
用電磁接触器又は降圧用電磁接触器の駆動コイルを消磁
する歩進用補助継電器とを備え、 前記昇圧用電磁接触器及び前記降圧用電磁接触器の駆動
コイルを励磁する励磁回路の自己保持接点に直列に第１
の接点をそれぞれ接続すると共に、これら自己保持接点
と第１の接点の直列回路に並列に第２の接点をそれぞれ
接続し、前記第２の接点がオンの時前記第１の接点がオ
フとなるように操作することを特徴とする負荷時タップ
切換装置。4. A main circuit that connects an AC power supply and a motor that drives a tap changer that switches a transformer tap,
A step-up electromagnetic contactor and a step-down electromagnetic contactor for switching the direction of current supply to the motor, and a brake electromagnetic contactor that is provided in the main circuit and short-circuits a power input end of the motor at the end of tap switching to apply braking. An excitation circuit that excites the drive coil of the step-up electromagnetic contactor, excites the drive coil by an ON operation and forms a self-holding circuit with self-holding contacts, and closes the step-up electromagnetic contactor. A step-up push-button switch for driving the electric motor in a step-up direction, and an excitation circuit for exciting a drive coil of the step-down electromagnetic contactor, which excites the drive coil by an ON operation and a self-holding circuit by a self-holding contact To form
A step-down push-button switch for closing the step-down electromagnetic contactor to drive the motor in the step-down direction; and operating when the stepping operation of the tap changer is completed by the motor to operate the step-up electromagnetic contactor or step-down. A step-up auxiliary relay for degaussing a drive coil of the electromagnetic contactor for use in the first step, and a first serially connected to a self-holding contact of an excitation circuit for exciting the drive coil of the step-up electromagnetic contactor and the step-down electromagnetic contactor.
And a second contact is connected in parallel to a series circuit of the self-holding contact and the first contact, and the first contact is turned off when the second contact is on. Tap switching device under load characterized by operating as follows.
コンによる遠隔操作で開閉させることを特徴とする請求
項４記載の負荷時タップ切換装置。5. The on-load tap switching device according to claim 4, wherein the first contact and the second contact are opened and closed by remote control using a wired remote controller.
プ切換器を駆動する電動機とを結ぶ主回路に設けられ、
前記電動機の通電方向を切換える昇圧用電磁接触器及び
降圧用電磁接触器と、前記主回路に設けられ、タップ切
換終了時に前記電動機の電源入力端を短絡して制動をか
けるブレーキ用電磁接触器と、前記昇圧用電磁接触器の
駆動コイルを励磁する励磁回路に設けられ、オン操作に
より前記駆動コイルを励磁すると共に自己保持接点によ
り自己保持回路を形成し、前記昇圧用電磁接触器を閉路
して前記電動機を昇圧方向に駆動する昇圧用押釦開閉器
と、前記降圧用電磁接触器の駆動コイルを励磁する励磁
回路に設けられ、オン操作により前記駆動コイルを励磁
すると共に自己保持接点により自己保持回路を形成し、
前記降圧用電磁接触器を閉路して前記電動機を降圧方向
に駆動する降圧用押釦開閉器と、前記電動機により前記
タップ切換器の歩進動作が終了すると動作して前記昇圧
用電磁接触器又は降圧用電磁接触器の駆動コイルを消磁
する歩進用補助継電器とを備え、 前記昇圧用押釦開閉器及び前記降圧用押釦開閉器の両端
に昇圧用操作端子及び降圧用操作端子をそれぞれ接続
し、この昇圧用操作端子及び降圧用操作端子間に光、
音、電波等による遠隔操作で開閉する接点をそれぞれ設
け、且つ前記昇圧用電磁接触器及び前記降圧用電磁接触
器の駆動コイルを励磁する励磁回路の自己保持接点に直
列に第１の接点をそれぞれ接続すると共に、これら自己
保持接点と第１の接点の直列回路に並列に第２の接点を
それぞれ接続し、有線リモコンによる遠隔操作で前記第
２の接点がオンの時前記第１の接点がオフとなるように
操作して前記変圧器タップを切換ることを特徴とする負
荷時タップ切換装置。6. A main circuit that connects an AC power supply and a motor that drives a tap changer that switches a transformer tap,
A step-up electromagnetic contactor and a step-down electromagnetic contactor for switching the direction of current supply to the motor, and a brake electromagnetic contactor that is provided in the main circuit and short-circuits a power input end of the motor at the end of tap switching to apply braking. An excitation circuit that excites the drive coil of the step-up electromagnetic contactor, excites the drive coil by an ON operation and forms a self-holding circuit with self-holding contacts, and closes the step-up electromagnetic contactor. A step-up push-button switch for driving the electric motor in a step-up direction, and an excitation circuit for exciting a drive coil of the step-down electromagnetic contactor, which excites the drive coil by an ON operation and a self-holding circuit by a self-holding contact To form
A step-down push-button switch for closing the step-down electromagnetic contactor to drive the motor in the step-down direction; and operating when the stepping operation of the tap changer is completed by the motor to operate the step-up electromagnetic contactor or step-down. A step-up auxiliary relay for demagnetizing the drive coil of the electromagnetic contactor, and a boosting operation terminal and a step-down operation terminal are connected to both ends of the step-up pushbutton switch and the step-down pushbutton switch, respectively. Light between the boost operation terminal and the step-down operation terminal,
A contact which is opened and closed by remote operation by sound, radio wave or the like is provided, respectively, and a first contact is provided in series with a self-holding contact of an excitation circuit for exciting a drive coil of the step-up electromagnetic contactor and the step-down electromagnetic contactor. The second contact is connected in parallel to the series circuit of the self-holding contact and the first contact, and the first contact is turned off when the second contact is turned on by remote operation with a wired remote controller. A tap switching device under load, characterized in that the transformer tap is switched by operating as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8283984A JPH10135053A (en) | 1996-10-25 | 1996-10-25 | On-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8283984A JPH10135053A (en) | 1996-10-25 | 1996-10-25 | On-load tap changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10135053A true JPH10135053A (en) | 1998-05-22 |
Family
ID=17672785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8283984A Pending JPH10135053A (en) | 1996-10-25 | 1996-10-25 | On-load tap changer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10135053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016081982A (en) * | 2014-10-14 | 2016-05-16 | 愛知電機株式会社 | Electric operation mechanism of on-load tap changer |
-
1996
- 1996-10-25 JP JP8283984A patent/JPH10135053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016081982A (en) * | 2014-10-14 | 2016-05-16 | 愛知電機株式会社 | Electric operation mechanism of on-load tap changer |
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