JP4719045B2 - Load tap changer - Google Patents

Load tap changer Download PDF

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JP4719045B2
JP4719045B2 JP2006079982A JP2006079982A JP4719045B2 JP 4719045 B2 JP4719045 B2 JP 4719045B2 JP 2006079982 A JP2006079982 A JP 2006079982A JP 2006079982 A JP2006079982 A JP 2006079982A JP 4719045 B2 JP4719045 B2 JP 4719045B2
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numbered
odd
contact
lead
contacts
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JP2007258393A (en
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幸延 瀧口
一志 源川
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Toshiba Corp
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

この発明は、電力用変圧器に使用される負荷時タップ切換器に関するものであって、特に、その駆動機構のリード貫通部の改良技術に係るものである。   The present invention relates to an on-load tap changer used for a power transformer, and particularly relates to an improvement technique of a lead through portion of a drive mechanism thereof.

負荷時タップ切換器は、変圧器に取り付けられ、変圧器の運転状態でタップ切り換えを行うために従来から多用されているもので、例えば、特許文献１にその一例を見ることができる。この特許文献１に記載の負荷時タップ切換器の１相分の要素構成を図４に示す。   The on-load tap changer is attached to the transformer and has been widely used in the past for switching the tap in the operation state of the transformer. For example, Patent Document 1 shows an example. The element structure for one phase of the on-load tap changer described in Patent Document 1 is shown in FIG.

図４において、１は、いわゆる単極双投開閉器の機能を持つ切換開閉器であって、この切替開閉器１は、出力端子１０、奇数および偶数側端子１１および１２、可動子１３とから成り、可動子１３の動作により奇数側固定端子１１、または、偶数側固定端子１２を選択的に出力端子１０に接続するように構成されている。   In FIG. 4, reference numeral 1 denotes a switching switch having the function of a so-called single-pole double-throw switch. The switching switch 1 includes an output terminal 10, odd and even terminals 11 and 12, and a mover 13. Thus, the odd-numbered fixed terminal 11 or the even-numbered fixed terminal 12 is selectively connected to the output terminal 10 by the operation of the movable element 13.

２は、奇数側接触子群２１と偶数側接触子群２２とこれら接触子群を駆動する駆動機構２３とから成るタップ選択器、３は切換開閉器１とタップ選択器２との間を接続する接続リードである。   2 is a tap selector comprising an odd-numbered contact group 21, an even-numbered contact group 22 and a drive mechanism 23 for driving these contact groups, and 3 is a connection between the switching switch 1 and the tap selector 2. Connection lead to

奇数側接触子群２１は、円周上に配置された奇数番固定接触子２１３、２１５、２１７……と、その同一平面・内側に同軸配置された奇数側環状集電接触子２１０と、一端が前記奇数側固定接触子に選択的に、他端が前記奇数側環状集電接触子に常時接触する奇数側可動接触子２１００とから構成される。   The odd-numbered contact group 21 includes odd-numbered fixed contacts 213, 215, 217... Arranged on the circumference, an odd-side annular current collecting contact 210 coaxially arranged on the same plane and inside thereof, and one end. Is configured to be selectively connected to the odd-numbered fixed contact and the other end of the odd-numbered movable contact 2100 is always in contact with the odd-numbered annular current collecting contact.

偶数側接触子群２２は、奇数側接触子群に平行同軸な円周上に配置された偶数番固定接触子２２２、２２６、２２６……と、その同一平面・内側に同軸配置された偶数側環状集電接触子２２０と、一端が前記偶数側固定接触子に選択的に他端が前記偶数側環状集電接触子に常時接触する偶数側可動接触子２２００とから構成されている。   The even-numbered contact group 22 includes even-numbered fixed contacts 222, 226, 226... Arranged on the circumference parallel to the odd-numbered contact group, and the even-numbered side arranged coaxially on the same plane and inside thereof. An annular current collecting contact 220 and an even-numbered movable contact 2200 having one end selectively in contact with the even-numbered fixed contact and the other end always in contact with the even-numbered annular current collecting contact.

奇数側固定接触子２１３、２１５、２１７……および偶数側固定接触子２２２、２２６、２２６……には、図示されない変圧器から引出された奇数番タップおよび偶数番タップが夫々接続される。   The odd-numbered fixed contacts 213, 215, 217... And the even-numbered fixed contacts 222, 226, 226... Are connected to odd-numbered taps and even-numbered taps drawn from a transformer (not shown), respectively.

駆動機構２３は、奇数側可動接触子を駆動する奇数側駆動機構２３１と偶数側可動接触子を駆動する偶数側駆動機構２３２から成り、それぞれ、上部奇数側および上部偶数側駆動アーム２３１１および２３２１と、下部奇数側および下部偶数側駆動アーム２３１２および２３２２、とそれらの間に張架された奇数側および偶数側駆動バー２３１３および２３２３とから構成されている。   The drive mechanism 23 includes an odd-numbered side drive mechanism 231 that drives the odd-numbered movable contactor and an even-numbered side drive mechanism 232 that drives the even-side movable contactor. The lower odd-numbered and lower even-numbered drive arms 2312 and 2322, and the odd-numbered and even-numbered drive bars 2313 and 2323 stretched between them.

接続リード３は、タップ選択器の奇数側環状集電接触子２１０と切換開閉器の奇数側端子１１とを接続する奇数側接続リード３１と、同じくタップ選択器の偶数側環状集電接触子２２０と切換開閉器の偶数側端子１２とを接続する偶数側接続リード３２とから成り、何れも、それぞれの環状集電接触子から内側へ引出されたのち、タップ選択器の中心を貫通して上方に引出された後、切換開閉器の奇数側および偶数側固定端子１１および１２に接続されている。 The connection lead 3 includes an odd-numbered side current collecting contact 210 for connecting the odd-numbered annular current collecting contact 210 of the tap selector and the odd-numbered side terminal 11 of the switching switch, and an even-numbered annular current collecting contact 220 of the tap selector. consists even number side connecting leads 32 for connecting the even number side terminal 12 of the diverter switch with both, after being drawn from the respective annular collector contacts inward, through the center of the tap selector After being pulled out upward, it is connected to the odd-numbered and even-numbered fixed terminals 11 and 12 of the switching switch.

このような構成を有する図４の従来技術では、切換開閉器の可動子１３が奇数側固定端子１１の側に投入しているときには、タップ選択器の奇数側可動接触子２１００が投入している固定接触子、例えば、図４においては、奇数番固定接触子２１５→奇数側可動接触子２１００→奇数側環状集電接触子２１０→奇数側接続リード３１→切換開閉器の奇数側端子１１→可動子１３→出力端子１０の経路で電流が流れる。   In the prior art of FIG. 4 having such a configuration, when the movable element 13 of the switching switch is turned on to the odd-numbered fixed terminal 11, the odd-numbered movable contact 2100 of the tap selector is turned on. For example, in FIG. 4, the odd-numbered fixed contact 215 → the odd-numbered movable contact 2100 → the odd-numbered annular current collecting contact 210 → the odd-numbered connection lead 31 → the odd-numbered terminal 11 of the switching switch → movable A current flows through the path from the child 13 to the output terminal 10.

また、切換開閉器の可動子１３が偶数側固定端子１２の側に投入しているときには、タップ選択器の偶数側可動接触子２２００が投入している固定接触子、例えば、図４においては、偶数番固定接触子２２６→偶数側可動接触子２２００→偶数側環状集電接触子２２０→偶数側接続リード３２→切換開閉器の偶数側端子１２→可動子１３→出力端子１０の経路で電流が流れる。   Further, when the movable switch 13 of the switching switch is inserted into the even-side fixed terminal 12, the fixed contact that the even-numbered movable contact 2200 of the tap selector is inserted, for example, in FIG. Even-numbered fixed contact 226 → even-side movable contact 2200 → even-side annular current collecting contact 220 → even-side connection lead 32 → even-side terminal 12 of switching switch → mover 13 → output terminal 10 Flowing.

以上は、三相負荷時タップ切換器の１相分の構成を示したものであるが、３相分の場合は、以上のように構成された切換開閉器を３群、タップ選択器の奇数および偶数接触子群、奇数および偶数側接続リードをそれぞれ３群用意して同様に配置接続すれば良いことは説明するまでもない。また、タップ選択器の３相分の可動接触子は周知のとおり一括駆動できるので駆動機構は増群する必要はない。   The above shows the configuration for one phase of a three-phase load tap changer. In the case of three phases, there are three groups of switching switches configured as described above, and an odd number of tap selectors. It goes without saying that three groups of even-numbered contact groups and odd-numbered and even-numbered side connection leads may be prepared and arranged and connected in the same manner. Further, since the movable contacts for the three phases of the tap selector can be collectively driven as is well known, it is not necessary to increase the number of driving mechanisms.

特公昭６２−１４０８５号公報Japanese Patent Publication No.62-14085

このような従来装置による負荷時タップ切換器は、タップ選択器と切換開閉器との間の接続リード３がタップ選択器の駆動機構２３の中心部を貫通して配設されている。そして、切換開閉器１が奇数側に投入しているときは奇数側接続リード３１に、また、偶数側に投入しているときは偶数側接続リード３２にというように、奇数または偶数側の接続リードの何れかの側に常時電流が流れることになり、この電流が駆動機構２３を貫通することになる。   In such a load tap changer according to the conventional apparatus, the connection lead 3 between the tap selector and the switching switch is disposed through the center of the drive mechanism 23 of the tap selector. When the switching switch 1 is turned on to the odd side, the odd-numbered or even-numbered connection lead 31 is connected. When the switching switch 1 is turned on to the even-numbered side, the odd-numbered or even-numbered connection lead 32 is connected. A current always flows on either side of the lead, and this current passes through the drive mechanism 23.

そして、駆動機構２３が磁性材料で構成されている場合には、前記電流によってその電流貫通部近傍内部に渦電流が発生し、この渦電流と材料の固有抵抗によって生じる渦電流損に因って駆動機構電流貫通部の加熱・温度上昇が発生する。   When the drive mechanism 23 is made of a magnetic material, an eddy current is generated in the vicinity of the current through portion by the current, and due to the eddy current loss caused by the eddy current and the specific resistance of the material. Heating / temperature rise of the drive mechanism current through portion occurs.

図５は、例えば、奇数側接続リード３１に電流ＩＬが流れている場合に、この電流ＩＬによる磁束φＬが駆動機構電流貫通部の一つ（つまり電流に鎖交する駆動機構の一部）である奇数側駆動アーム２３１１に発生している様子を例示したもので、奇数側駆動アーム２３１１が磁性材料で構成されている場合は、この磁束φＬによる渦電流損に因って、当該部に加熱・温度上昇が発生する。 Figure 5 is, for example, when the current I L on the odd side connection lead 31 is flowing, the current I L by the magnetic flux phi L is the drive mechanism current through portion of one (i.e. drive mechanism interlinked to the current one an illustration of a state occurring on the odd side drive arm 2311 is part), when the odd drive arm 2311 is composed of a magnetic material, and due to eddy current loss caused by the magnetic flux phi L, Heating and temperature rise occur in the part.

そして、この加熱・温度上昇の程度によっては、負荷時タップ切換器の定格電流値を制限するか、あるいは、駆動機構を非磁性材料で構成しなければならないという問題が生じる。   Depending on the degree of heating and temperature rise, there is a problem that the rated current value of the on-load tap changer must be limited or the drive mechanism must be made of a nonmagnetic material.

この発明は、前記のような問題を解決するためになされたもので、駆動機構のリード貫通部に生じる渦電流損失を低減し、もって渦電流損失による電流制限を軽減できる負荷時タップ切換器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 provides a load tap changer that can reduce eddy current loss that occurs in the lead-through portion of the drive mechanism and thereby reduce current limitation due to eddy current loss. The purpose is to provide.

この発明は、次の構成を有することを特徴とする。
(1)奇数側端子と偶数側端子と出力端子と可動子とを有し、その可動子の動作によって、
出力端子を奇数側端子または偶数側端子の何れかに選択的に投入接続する切換開閉器。
(2)円周上に配置された複数個の奇数側固定接触子と、該円周の同一平面・内側に同軸に
配設された奇数側環状集電接触子と、一端が前記奇数側固定接触子に選択的に接触し、他
端が前記奇数側環状集電接触子に常時接触する奇数側可動接触子とから成る奇数側接触子
群。
(3)円周上に配置された複数個の偶数側固定接触子と、該円周の同一平面・内側に同軸配
設された偶数側環状集電接触子と、一端が前記偶数側固定接触子に選択的に接触し、他端
が前記偶数側環状集電接触子に常時接触する偶数側可動接触子とから成る偶数側接触子群。
(4)前記奇数側および偶数側接触子群を上下に同軸配置すると共に、これら接触子群の上
下の少なくとも一方に置かれた磁性材料からなる駆動機構で前記固定側および可動側の可
動接触子を駆動するように構成されたタップ選択器。
(5)前記タップ選択器の奇数側および偶数側環状集電接触子と、切換開閉器の奇数側およ
び偶数側端子との間を夫々接続する接続リード。
(6)前記各環状集電接触子から引き出されて上方へ伸びる上方引出接続リードと、前記上
方引出接続リードが引き出されたものと同じ環状集電接触子から引き出されて下方へ伸び
る下方引出接続リードとから構成される接続リード。
(7)前記上方引出接続リードと下方引出リードからなる接続リードを、前記駆動機構の内
側および外側を一度通過した後前記切換開閉器の共通の端子に接続する。 The present invention is characterized by having the following configuration.
(1) It has an odd-numbered terminal, an even-numbered terminal, an output terminal, and a mover.
A switching switch that selectively connects the output terminal to either the odd-numbered terminal or the even-numbered terminal.
(2) A plurality of odd-side fixed contacts arranged on the circumference, an odd-side annular current collecting contact arranged coaxially on the same plane and inside the circumference, and one end fixed to the odd-number side An odd- numbered contact group comprising an odd-numbered movable contact that selectively contacts the contact and the other end always contacts the odd-numbered annular current collecting contact.
(3) A plurality of even-side fixed contacts arranged on the circumference, an even-side annular current collecting contact arranged coaxially on the same plane and inside of the circumference, and one end of the even-side fixed contact selectively contact the child, even-side contact element group to which the other end consisting of the even side movable contact that contacts always with the even-numbered annular collector contacts.
(4) The odd-numbered side and even-numbered side contactor groups are coaxially arranged in the vertical direction, and the fixed side and movable side movable contactors are driven by a driving mechanism made of a magnetic material placed on at least one of the top and bottom sides of these contactor groups. A tap selector configured to drive.
(5) Connection leads for connecting between the odd-numbered and even-numbered annular current collecting contacts of the tap selector and the odd-numbered and even-numbered terminals of the switching switch, respectively.
(6) An upper lead connection lead that is drawn out from each annular current collector contact and extends upward, and a lower lead connection that is drawn from the same annular current collector contact as that from which the upper lead connection lead is drawn and extends downward Connection lead composed of leads.
(7) A connection lead composed of the upper lead connection lead and the lower lead lead is connected to a common terminal of the switching switch after passing once inside and outside the drive mechanism.

なお、切換開閉器と、タップ選択器における奇数側および偶数側接触子群とが複数組設けられた負荷時タップ切換器についても、同様な構成とすることができる。更に、接触子群の上側に駆動機構がある場合は上方へ引出した上方引出接続リードが、また下側に駆動機構がある場合は下方へ引出した下方引出接続リードが、それら駆動機構をそれぞれ貫通していることが望ましい。   The same configuration can be applied to the on-load tap changer in which a plurality of sets of switching switches and odd-numbered and even-numbered contact groups in the tap selector are provided. Further, when there is a drive mechanism on the upper side of the contact group, the upper lead connection lead drawn upwards, and when there is a drive mechanism on the lower side, the lower lead connection leads drawn downward pass through these drive mechanisms. It is desirable that

この発明によれば、奇数側および偶数側とも接続リードが上方引出と下方引出の２本並列リードで構成されており、これによって上部および下部駆動機構を貫通する電流が従来技術の１／２となり、渦電流損失による加熱・発熱が抑制される。   According to the present invention, both the odd and even sides have the connecting leads composed of two parallel leads, an upper lead and a lower lead, so that the current passing through the upper and lower drive mechanisms is ½ that of the prior art. Heating and heat generation due to eddy current loss are suppressed.

（１）第１実施形態
以下、この発明の第１実施形態を図１に従って具体的に説明する。図１は、この発明の第１実施形態の負荷時タップ切換器を、その１相分を代表して示す構成図であって、前記従来技術と同じ符号の部分についてはその説明は省略する。 (1) First Embodiment Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a block diagram showing a one-phase portion of the on-load tap changer according to the first embodiment of the present invention, and the description of the same reference numerals as those in the prior art is omitted.

図１において、４は、この実施形態における切換開閉器とタップ選択器の間の接続リードで、奇数側および偶数側接続リード４１および４２とから構成されている。奇数側接続リード４１は奇数側環状接触子２１０からタップ選択器の中心部を貫通して上方に引出されたのち切換開閉器の奇数側端子１１に接続された上方引出リード４１１と、同じく奇数側環状接触子２１０からタップ選択器の中心部を貫通して下方に引出されたのち切換開閉器の奇数側端子１１に接続された下方引出接続リード４１２とから成る。   In FIG. 1, reference numeral 4 denotes a connection lead between the switching switch and the tap selector in this embodiment, and is composed of odd-numbered and even-numbered connection leads 41 and 42. The odd-numbered connection lead 41 passes through the center portion of the tap selector from the odd-numbered annular contactor 210 and is then drawn upward, and then connected to the odd-numbered terminal 11 of the switching switch. It consists of a lower lead connection lead 412 which is drawn from the annular contactor 210 through the center of the tap selector and then connected to the odd terminal 11 of the switching switch.

また、偶数側接続リード４２は偶数側環状接触子２２０からタップ選択器の中心部を貫通して上方に引出されたのち切換開閉器の偶数側端子１２に接続された上方引出接続リード４２１と、同じく偶数側環状接触子２２０からタップ選択器の中心部を貫通して下方に引出されたのち切換開閉器の偶数側端子１２に接続された下方引出接続リード４２２とから成る。   Further, the even-side connection lead 42 passes through the center portion of the tap selector from the even-side annular contact 220 and is drawn upward, and then connected to the even-side terminal 12 of the switching switch, Similarly, it comprises a lower lead connection lead 422 which is drawn downward from the even-numbered annular contactor 220 through the center of the tap selector and then connected to the even-numbered terminal 12 of the switching switch.

以上説明したように、この第１実施形態では、奇数側および偶数側とも接続リードが上方引出と下方引出の２本並列リードで構成されており、これによって上部および下部駆動機構を貫通する電流が従来例の構成の１／２となるので、従来の負荷時タップ切換器で見られたような加熱・温度上昇問題が低減される。更に、電流を通流していない側の接続リードが駆動機構に鎖交する短絡ループを形成し、この短絡ループの電磁誘導作用によって駆動機構内に生じる磁束の一部が相殺されるので、加熱・温度上昇が更に低減される。   As described above, in the first embodiment, the odd-numbered side and the even-numbered side are configured with two parallel leads, the upper lead and the lower lead, so that the current passing through the upper and lower drive mechanisms is reduced. Since it becomes 1/2 of the structure of a prior art example, the heating and temperature rise problem which was seen with the conventional load tap changer is reduced. Further, the connection lead on the side not passing the current forms a short-circuit loop interlinking with the drive mechanism, and a part of the magnetic flux generated in the drive mechanism is canceled by the electromagnetic induction action of this short-circuit loop. The temperature rise is further reduced.

図２は、駆動機構上部駆動アーム２３１１を代表例として、奇数側接続リードに電流が流れている場合に磁束の一部が相殺されるメカニズムを説明したものである。図２において、奇数側接続上方引出リード４１１に負荷電流ＩＬ／２が流れると、それによって駆動機構上部アーム２３１１に先ず磁束φＬが発生するところまでは従来技術と同じである。 FIG. 2 illustrates a mechanism in which a part of the magnetic flux is canceled when a current flows through the odd-numbered connection leads, using the drive mechanism upper drive arm 2311 as a representative example. In FIG. 2, when a load current I L / 2 flows through the odd-numbered connection upper lead 411, the magnetic flux φ L is first generated in the drive mechanism upper arm 2311.

この第１実施形態の新たな作用は、電流を通流していない偶数側の接続リード４２が駆動機構上部アーム２３１１に鎖交した短絡ループを形成している点である。前記磁束φＬにより、この短絡ループには負荷電流ＩＬ／２とは逆向きの誘導電流Ｉｉが流れ、この誘導電流Ｉｉにより、駆動機構上部アーム２３１１に、前記磁束φＬと逆向きの磁束φｉが発生する。その結果、駆動機構上部アーム内の総磁束はφＬ−φｉ＜φＬとなる。すなわち、総磁束の一部が相殺低減され、渦電流損およびそれによる加熱・温度上昇問題が軽減される。 The new action of the first embodiment is that an even-numbered connection lead 42 through which no current flows forms a short-circuited loop linked to the drive mechanism upper arm 2311. By the magnetic flux phi L, this short circuit loop induced current Ii reverse flow of the load current I L / 2, by the induced current Ii, the drive mechanism upper arm 2311, the magnetic flux of the magnetic flux phi L and opposite φi occurs. As a result, the total magnetic flux of the drive mechanism in the upper arm becomes φ L -φi <φ L. That is, a part of the total magnetic flux is offset and reduced, and the eddy current loss and the resulting heating / temperature rise problem are alleviated.

図２では駆動機構上部アーム２３１１の場合を例に説明したが、駆動機構上部アーム２３２１、駆動機構下部アーム２３１２および２３２２でも全く同様にして、総磁束の一部が相殺低減され、渦電流損およびそれに起因する加熱・温度上昇問題が軽減されることは、言うまでもない。また、偶数側に電流が流れている場合は、奇数側の接続リードが駆動機構上部アームに鎖交した短絡ループを形成して同様効果を生じることも言うまでもない。   In FIG. 2, the case of the drive mechanism upper arm 2311 has been described as an example. However, in the drive mechanism upper arm 2321 and the drive mechanism lower arms 2312 and 2322, part of the total magnetic flux is canceled and reduced in the same manner, and eddy current loss and Needless to say, the heating and temperature rise problems resulting from this are alleviated. Further, when the current is flowing on the even side, it goes without saying that the odd-numbered connection leads form a short-circuited loop linked to the upper arm of the driving mechanism to produce the same effect.

以上は、三相負荷時タップ切換器の１相分の構成を示したものであるが、３相分の場合は、以上のように構成された切換開閉器を３群、タップ選択器の奇数および偶数接触子群、奇数および偶数側接続リードをそれぞれ３群用意して同様に配置接続すれば良いことは説明するまでもない。   The above shows the configuration for one phase of a three-phase load tap changer. In the case of three phases, there are three groups of switching switches configured as described above, and an odd number of tap selectors. It goes without saying that three groups of even-numbered contact groups and odd-numbered and even-numbered side connection leads may be prepared and arranged and connected in the same manner.

また、タップ選択器の３相分の可動接触子は周知のとおり一括駆動できるので駆動機構は増群する必要はない。なお、接触子群の上下に配置された駆動機構構成要素２３１１、２３１２、２３２１、２３２２は何れも駆動アームとして説明したが、、説明の便宜上、歯車、軸受、フレームなどを含む駆動機構構成要素の代表として駆動アームと称しただけで、何も駆動アームのみに限るものではない。   Further, since the movable contacts for the three phases of the tap selector can be collectively driven as is well known, it is not necessary to increase the number of driving mechanisms. Although the drive mechanism components 2311, 2312, 2321, and 2322 arranged above and below the contact group have been described as drive arms, for convenience of description, the drive mechanism components including gears, bearings, frames, and the like are described. The drive arm is simply referred to as a representative, and nothing is limited to the drive arm.

（２）第２実施形態
図３は、この発明の第２実施形態である負荷時タップ切換器を、その１相分を代表して示す構成図である。図３において、従来技術と同じ符号の部分については説明は省略する。また、切換開閉器およびタップ選択器接点群に、添字ａおよびｂが付されたものは、添字なしの従来例と同じものを２群用意し、一方をａ群、他方をｂ群と識別したものである。 (2) Second Embodiment FIG. 3 is a block diagram showing a one-phase portion of a load tap changer according to a second embodiment of the present invention. In FIG. 3, the description of the same reference numerals as those in the prior art is omitted. In addition, for the switching switch and the tap selector contact group, those with suffixes a and b are prepared in the same two groups as the conventional example without suffix, and one is identified as group a and the other is identified as group b. Is.

５は、この第２実施形態における切換開閉器とタップ選択器間、タップ選択器内、切換開閉器内の接続リードで、切換開閉器とタップ選択器間の奇数側接続リード５１、偶数側接続リード５２、タップ選択器固定接触子間接続リード５３、切換開閉器端子間接続リード５４とから成る。   5 is a connection lead between the switching switch and the tap selector, in the tap selector, and in the switching switch in the second embodiment. The odd-numbered connection lead 51 and the even-numbered connection between the switching switch and the tap selector. It comprises a lead 52, a tap selector fixed contact connecting lead 53, and a switching switch terminal connecting lead 54.

奇数側接続リード５１は、奇数側環状接触子２１０ａからタップ選択器の中心部を貫通して上方に引出されたのち切換開閉器の奇数側端子１１ａに接続されたリード５１ａと、同じく奇数側環状接触子２１０ｂからタップ選択器の中心部を貫通して下方に引出されたのち切換開閉器の奇数側端子ｌｌｂに接続されたリード５ｌｂとから成る。   The odd-numbered connection lead 51 is connected to the odd-numbered side terminal 11a of the switching switch after being pulled out from the odd-numbered annular contactor 210a through the center of the tap selector, and similarly to the odd-numbered ring-shaped contact lead 51a. The lead 5lb is connected to the odd-numbered terminal llb of the switching switch after being pulled out from the contact 210b through the center of the tap selector.

偶数側接続リード５２は、偶数側環状接触子２２０ａからタップ選択器の中心部を貫通して上方に引出されたのち切換開閉器の偶数側端子１２ａに接続されたリード５２ａと、同じく偶数側環状接触子２２０ｂからタップ選択器の中心部を貫通して下方に引出されたのち切換開閉器の偶数側端子１２ｂに接続されたリード５２ｂとから成る。   The even-numbered connection lead 52 is connected to the even-numbered terminal 12a of the switching switch after being pulled out from the even-numbered ring contactor 220a through the center of the tap selector and the even-numbered ring-shaped contact lead 52a. The lead 52b is connected to the even-numbered terminal 12b of the switching switch after being drawn downward from the contact 220b through the center of the tap selector.

タップ選択器固定接触子間接続リード５３は、奇数側接点群の各同一番号固定接触子間を接続するリード５３５（説明の便宜上、固定接触子２１５ａと２１５ｂ間の接続リード５３５のみ表示）と、偶数側接点群の各同一番号固定接触子間を接続するリード５３６（説明の便宜上、固定接触子２２６ａと２２６ｂ間の接続リード５３６のみ表示）とから成る。   The tap selector fixed contact connecting lead 53 includes a lead 535 (only the connection lead 535 between the fixed contacts 215a and 215b is shown) for connecting the same number fixed contacts of the odd-numbered contact group, and It consists of leads 536 (only the connection leads 536 between the fixed contacts 226a and 226b are shown) for connecting between the fixed contacts of the same number in the even-numbered contact group.

切換開閉器端子間接続リード５４は、切換開閉器の奇数側端子ｌｌａとｌｌｂ間の接続リード５４１と、偶数側端子１２ａと１２ｂ間の接続リード５４２とから成る。   The switching switch terminal connection lead 54 includes a connection lead 541 between the odd-numbered terminals lla and llb of the switching switch and a connection lead 542 between the even-numbered terminals 12a and 12b.

このような構成を有する第２実施形態においては、切換開閉器の可動子１３ａおよび１３ｂが奇数側固定端子１１ａおよび１１ｂの側に投入しているときには、タップ選択器の奇数側可動接触子２１００ａおよび２１００ｂが投入している固定接触子（例えば、図３においては、奇数番固定接触子２１５ａおよび２１５ｂ）、奇数側可動接触子２１００ａおよび２１００ｂ、奇数側環状集電接触子２１０ａおよび２１０ｂ、奇数側接続リード５１ａおよび５ｌｂ、切換開閉器の奇数側端子１１ａおよびＨｂ、可動子１３ａおよび１３ｂを経て出力端子１０ａおよび１０ｂに電流が流れる。   In the second embodiment having such a configuration, when the movable elements 13a and 13b of the switching switch are put on the odd-numbered fixed terminals 11a and 11b, the odd-numbered movable contact 2100a of the tap selector and Fixed contacts (for example, odd-numbered fixed contacts 215a and 215b in FIG. 3), odd-side movable contacts 2100a and 2100b, odd-side annular current collecting contacts 210a and 210b, odd-side connection Current flows to the output terminals 10a and 10b through the leads 51a and 5lb, the odd-numbered terminals 11a and Hb of the switching switch, and the movers 13a and 13b.

また、切換開閉器の可動子１３ａおよび１３ｂが偶数側固定端子１２ａおよび１２ｂの側に投入しているときには、タップ選択器の偶数側可動接触子２２００ａおよび２２００ｂが投入している固定接触子（例えば、図３においては、偶数番固定接触子２２６ａおよび２２６ｂ）、偶数側可動接触子２２００ａおよび２２００ｂ、偶数側環状集電接触子２２０ａおよび２２０ｂ、偶数側接続リード５２ａおよび５２ｂ、切換開閉器の偶数側端子１２ａおよび１２ｂ、可動子１３ａおよび１３ｂを経て出力端子１０ａおよび１０ｂに電流が流れる。   When the movable elements 13a and 13b of the switching switch are inserted into the even-numbered fixed terminals 12a and 12b, the fixed contacts (for example, the movable contacts 2200a and 2200b of the tap selector are inserted) 3, even-numbered fixed contacts 226a and 226b), even-numbered movable contacts 2200a and 2200b, even-numbered annular current collecting contacts 220a and 220b, even-numbered side connection leads 52a and 52b, even-numbered side of the switching switch A current flows through the terminals 12a and 12b and the movers 13a and 13b to the output terminals 10a and 10b.

以上説明したように、この第２実施形態でも前記第１実施形態と同様に、奇数側および偶数側とも接続リードが上方引出と下方引出の２本並列リードで構成されており、これによって上部および下部駆動機構を貫通する電流が従来例の構成の１／２となるので、加熱・温度上昇問題が低減される。   As described above, in the second embodiment as well, in the same way as in the first embodiment, the connection leads are configured by two parallel leads of the upper lead and the lower lead on both the odd and even sides. Since the current passing through the lower drive mechanism is ½ that of the conventional configuration, the heating / temperature rise problem is reduced.

更に、電流を通流していない側の接続リードで構成されるループ、例えば、図３のように奇数側で通電している場合には、タップ選択器の固定接触子間接続リード５３４→偶数側固定接触子２２６ａ→可動接触子２２００ａ→環状集電接触子２２０ａ→接続リード５２ａ→切換開閉器偶数側端子１２ａ→接続リード５４２→換開閉器偶数側端子１２ｂ→接続リード５２ｂ→タップ選択器の環状集電接触子２２０ｂ→可動接触子２２００ｂ→固定接触子２２６ｂ→固定接触子間接続リード５３４から成るループが、駆動機構に鎖交する短絡ループを形成するので、第１実施形態で説明したと全く同様に、この短絡ループの電磁誘導作用によって駆動機構内に生じる磁束の一部が相殺され加熱・温度上昇問題が更に低減される。   Furthermore, when a current is applied on the odd side as shown in FIG. 3, for example, a loop composed of connection leads on the side through which no current flows, the connection lead 534 between the fixed contacts of the tap selector → the even number side. Fixed contact 226a → movable contact 2200a → annular current collecting contact 220a → connecting lead 52a → switching switch even terminal 12a → connecting lead 542 → switching switch even terminal 12b → connecting lead 52b → tap selector ring Since the loop formed by the current collecting contact 220b → the movable contact 2200b → the fixed contact 226b → the fixed contact connecting lead 534 forms a short-circuited loop linked to the drive mechanism, it is completely the same as described in the first embodiment. Similarly, a part of the magnetic flux generated in the drive mechanism is canceled by the electromagnetic induction action of the short-circuit loop, and the heating / temperature rise problem is further reduced.

以上は、三相負荷時タップ切換器の１相分の構成を示したものであるが、３相分の場合は、以上のように構成された切換開閉器を３群、タップ選択器の奇数および偶数接触子群、奇数および偶数側接続リードをそれぞれ３群用意して同様に配置接続すれば良いことは説明するまでもない。また、タップ選択器の３相分の可動接触子は周知のとおり一括駆動できるので駆動機構は増群する必要はない。   The above shows the configuration for one phase of a three-phase load tap changer. In the case of three phases, there are three groups of switching switches configured as described above, and an odd number of tap selectors. It goes without saying that three groups of even-numbered contact groups and odd-numbered and even-numbered side connection leads may be prepared and arranged and connected in the same manner. Further, since the movable contacts for the three phases of the tap selector can be collectively driven as is well known, it is not necessary to increase the number of driving mechanisms.

この発明の第１実施形態の負荷時タップ切換器の構成を示す模式図。The schematic diagram which shows the structure of the tap switching device at the time of 1st Embodiment of this invention. この発明の構成要点である渦電流損の軽減作用を説明する概念図。The conceptual diagram explaining the reduction | restoration effect | action of the eddy current loss which is the structure main point of this invention. この発明の第２実施形態の負荷時タップ切換器の構成を示す模式図。The schematic diagram which shows the structure of the tap switching device at the time of 2nd Embodiment of this invention. 従来の負荷時タップ切換器の構成を示す模式図。The schematic diagram which shows the structure of the conventional load tap changer. 従来の負荷時タップ切換器における渦電流損発生の作用を説明する概念図。The conceptual diagram explaining the effect | action of the eddy current loss generation | occurrence | production in the conventional tap changer at the time of a load.

符号の説明Explanation of symbols

１ …切換開閉器
１０…出力端子
１１…奇数側端子
１２…偶数側端子
１３…可動子
２ …タップ選択器
２１…奇数側接触子群
２１０…奇数側環状集電接触子
２１３、２１５、２１７… 奇数番固定接触子
２１００…奇数側可動接触子
２２…偶数側接触子群
２２０…偶数側環状集電接触子
２２２、２２４、２２６…偶数番固定接触子
２２００ …偶数側可動接触子
２３…駆動機構
２３１…奇数側駆動機構
２３１１…奇数側上部駆動アーム
２３１２…奇数側下部駆動アーム
２３１３… 奇数側駆動バー
２３２…偶数側駆動機構
２３２１…偶数側上部駆動アーム
２３２２…偶数側下部駆動アーム
２３２３…偶数側駆動バー
４…接続リード
４１…奇数側接続リード
４１１…上方引出接続リード
４１２…下方引出接続リード
４２…偶数側接続リード
４２１…上方引出接続リード
４２２…下方引出接続リード
５…接続リード
５１…奇数側接続リード
５１ａ…上方引出接続リード
５１ｂ…下方引出接続リード
５ ２ … 偶数側接続リード
５２ａ…上方引出接続リード
５２ｂ…下方引出接続リード
５３…タップ選択器固定接触子間接続リード
５３１… 奇数番固定接触子間接続リード
５３２… 偶数番固定接触子間接続リード
５４…切換開閉器端子間接続リード
５３１… 奇数端子間接続リード
５３２… 偶数端子間接続リード DESCRIPTION OF SYMBOLS 1 ... Switching switch 10 ... Output terminal 11 ... Odd side terminal 12 ... Even side terminal 13 ... Movable element 2 ... Tap selector 21 ... Odd side contact group 210 ... Odd side annular current collection contact 213, 215, 217 ... Odd-numbered fixed contact 2100 ... Odd-side movable contact 22 ... Even-side contact group 220 ... Even-side annular current collecting contact 222, 224, 226 ... Even-numbered fixed contact 2200 ... Even-side movable contact 23 ... Drive mechanism 231 ... odd driving mechanism 2311 ... odd upper drive arm 2312 ... odd lower drive arm 2313 ... odd drive bar 232 ... even number side drive mechanism 2321 ... even number side upper drive arm 2322 ... even number side lower drive arm 2323 ... even number side drive bar 4 ... connecting leads 41 ... odd connection lead 411 ... upper lead connection leads 412 ... lower lead connecting leads 42 ... even-numbered connection lead 421 ... upper Drawer connection lead 422 ... Lower lead connection lead 5 ... Connection lead 51 ... Odd side connection lead 51a ... Upper lead connection lead 51b ... Lower lead connection lead 52 ... Even side connection lead 52a ... Upper lead connection lead 52b ... Lower lead connection lead 53 ... Tap selector fixed contact connecting lead 531 ... Odd number fixed contact connecting lead 532 ... Even number fixed contact connecting lead 54 ... Switching switch terminal connecting lead 531 ... Odd terminal connecting lead 532 ... Even number Terminal connection lead

Claims (3)

奇数側端子と偶数側端子と出力端子と可動子とを有し、その可動子の動作によって、出力端子を奇数側端子または偶数側端子の何れかに選択的に投入接続する切換開閉器と、
円周上に配置された複数個の奇数側固定接触子と、該円周の同一平面・内側に同軸に配設された奇数側環状集電接触子と、一端が前記奇数側固定接触子に選択的に接触し、他端が前記奇数側環状集電接触子に常時接触する奇数側可動接触子とから成る奇数側接触子群と、
円周上に配置された複数個の偶数側固定接触子と、該円周の同一平面・内側に同軸配設された偶数側環状集電接触子と、一端が前記偶数側固定接触子に選択的に接触し、他端が前記偶数側環状集電接触子に常時接触する偶数側可動接触子とから成る偶数側接触子群とを備え、
前記奇数側および偶数側接触子群を上下に同軸配置すると共に、これら接触子群の上下の少なくとも一方に置かれた磁性材料からなる駆動機構で前記固定側および可動側の可動接触子を駆動するように構成されたタップ選択器と、
前記タップ選択器の奇数側および偶数側環状集電接触子と、切換開閉器の奇数側および偶数側端子との間を夫々接続する接続リードと、
を備えた負荷時タップ切換器において、
前記接続リードが、前記各環状集電接触子から引き出されて上方へ伸びる上方引出接続リードと、前記上方引出接続リードが引き出されたものと同じ環状集電接触子から引き出されて下方へ伸びる下方引出接続リードとから構成され、
前記上方引出接続リードと下方引出リードからなる接続リードが、前記駆動機構の内側および外側を一度通過した後前記切換開閉器の共通の端子に接続されていることを特徴とする負荷時タップ切換器。 A switching switch that has an odd-numbered side terminal, an even-numbered side terminal, an output terminal, and a mover, and selectively inserts and connects the output terminal to either the odd-numbered side terminal or the even-numbered side terminal by operation of the mover;
A plurality of odd-side fixed contacts arranged on the circumference, an odd-side annular current collecting contact arranged coaxially on the same plane and inside the circumference, and one end of the odd-side fixed contact An odd- numbered contact group composed of an odd-numbered movable contact that selectively contacts and the other end always contacts the odd-numbered annular current collecting contact;
A plurality of even-side fixed contacts arranged on the circumference, an even-side annular current collecting contact coaxially arranged on the same plane and inside of the circumference, and one end selected as the even-side fixed contact contact, and an even-side contact element group to which the other end consisting of the even side movable contact that contacts always with the even-numbered annular collector contacts,
The odd-numbered side and even-numbered side contactor groups are coaxially arranged in the vertical direction, and the fixed side and movable side movable contactors are driven by a drive mechanism made of a magnetic material placed on at least one of the upper and lower sides of these contactor groups. A tap selector configured to:
Connection leads connecting the odd-numbered and even-numbered annular current collecting contacts of the tap selector and the odd-numbered and even-numbered terminals of the switching switch, respectively.
On-load tap changer with
The connection lead is drawn out from each of the annular current collecting contacts and extends upward, and the lower part is drawn out from the same annular current collection contact as that from which the upper lead connection lead is drawn and extends downward A lead connection lead,
The load tap changer characterized in that the connection lead comprising the upper lead connection lead and the lower lead lead is connected to a common terminal of the switching switch after passing once inside and outside the drive mechanism. . 前記切換開閉器と、前記タップ選択器における奇数側および偶数側接触子群とが複数組設けられ、
前記複数組の切換開閉器の奇数側端子間および偶数側端子間が接続リードで互いに共通接続され、前記奇数側および偶数側接触子群における奇数側および偶数側固定接触子の同一番接触子間が接続リードで互いに共通接続され、
前記タップ選択器の複数組の接触子群の一方の奇数側および偶数側環状集電接触子から内側に引出された各１本の上方引出接続リードが環状集電接触子群の内側を通して上方へ、前記タップ選択器の複数組の接触子群の他方の奇数側および偶数側環状集電接触子から内側に引出された各１本の下方引出接続リードが環状集電接触子の内側を通し下方へ夫々引出され、これら上方引出接続リードと下方引出接続リードが前記駆動機構の内側および外側を一度通過した後切換開閉器の奇数側あるいは偶数側端子の何れか一方に接続されていることを特徴とする請求項１に記載の負荷時タップ切換器。 A plurality of sets of the switching switch and the odd-numbered and even-numbered contact groups in the tap selector are provided,
Between the odd-numbered terminals and the even-numbered terminals of the plurality of sets of switching switches are connected in common with connection leads, and between the same number contacts of the odd-numbered and even-numbered fixed contacts in the odd-numbered and even-numbered contact groups Are connected to each other via connection leads,
Each one of the upper lead-out connection leads drawn inward from one odd-numbered and even-numbered annular current collecting contacts of the plurality of sets of contact groups of the tap selector is directed upward through the inside of the annular current collecting contact group. Each of the lower lead connection leads drawn inward from the other odd-numbered and even-numbered annular current collecting contacts of the plurality of contact groups of the tap selectors passes through the inside of the annular current collecting contact The upper lead connection lead and the lower lead connection lead are respectively connected to either the odd number side or even number side terminal of the switching switch after passing once inside and outside the drive mechanism. The on-load tap changer according to claim 1. 前記接触子群の上側に駆動機構がある場合は上方へ引出した上方引出接続リードが、また下側に駆動機構がある場合は下方へ引出した下方引出接続リードが、それら駆動機構をそれぞれ貫通していることを特徴とする請求項１または請求項２に記載の負荷時タップ切換器。   When there is a drive mechanism on the upper side of the contact group, an upper lead connection lead drawn upward, and when there is a drive mechanism on the lower side, a lower lead connection lead drawn downward passes through the drive mechanism. The on-load tap changer according to claim 1 or 2, characterized by comprising:
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