JPH0682840U - Double ratio current transformer - Google Patents
Double ratio current transformerInfo
- Publication number
- JPH0682840U JPH0682840U JP2479793U JP2479793U JPH0682840U JP H0682840 U JPH0682840 U JP H0682840U JP 2479793 U JP2479793 U JP 2479793U JP 2479793 U JP2479793 U JP 2479793U JP H0682840 U JPH0682840 U JP H0682840U
- Authority
- JP
- Japan
- Prior art keywords
- metal container
- primary conductor
- conductor
- primary
- iron core
- 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.)
- Withdrawn
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
(57)【要約】
【目的】二重比変流器の過電流域での誤差を改善する。
【構成】リング状鉄心６０１に２次コイルを巻回した２
次ユニット６を金属容器１内に収納し、２次ユニット６
を貫通させた第１の１次導体７及び第２の１次導体８を
金属容器１に支持する。第１の１次導体７は第２の１次
導体８及び金属容器１に対して絶縁した状態で設け、第
２の１次導体８は一端を金属容器１に電気的に接続した
状態で設ける。金属容器１の筒状部の外面に沿って配置
した直列接続用導体１５により第１の１次導体７の他端
と第２の１次導体８の一端との間を接続する。直列接続
用導体１５を２次ユニットの鉄心から磁気遮蔽するため
の磁気遮蔽板２５を設ける。
(57) [Summary] [Purpose] To improve the error in the overcurrent region of the dual ratio current transformer. [Structure] A secondary coil is wound around a ring-shaped iron core 601.
The secondary unit 6 is stored in the metal container 1 and the secondary unit 6
The first primary conductor 7 and the second primary conductor 8 penetrating through are supported by the metal container 1. The first primary conductor 7 is provided while being insulated from the second primary conductor 8 and the metal container 1, and the second primary conductor 8 is provided with one end electrically connected to the metal container 1. . The other end of the first primary conductor 7 and one end of the second primary conductor 8 are connected by the serial connection conductor 15 arranged along the outer surface of the tubular portion of the metal container 1. A magnetic shield plate 25 for magnetically shielding the serial connection conductor 15 from the iron core of the secondary unit is provided.
Description
【０００１】[0001]
本考案は、変流比を切り換えることができる二重比変流器に関するものである 。 The present invention relates to a dual ratio current transformer capable of switching the current ratio.
【０００２】[0002]
高圧用の変流器として、高圧電位部に碍管を介して支持された金属容器内に２ 次ユニットと１次導体とを収納した構造を有する、いわゆる倒立形の変流器が知 られている。２次ユニットは、リング状の鉄心と該鉄心に巻回された２次コイル とをドーナツ状のシールドケース内に収納した構造を有し、１次導体は金属容器 内で２次ユニットの内側を貫通した状態で設けられて、その一端及び他端が金属 容器の外部に導出されている。 As a high-voltage current transformer, a so-called inverted current transformer having a structure in which a secondary unit and a primary conductor are housed in a metal container supported by a high-voltage potential portion via an insulator is known. . The secondary unit has a structure in which a ring-shaped iron core and a secondary coil wound around the iron core are housed in a doughnut-shaped shield case, and the primary conductor is located inside the secondary unit in a metal container. It is provided in a penetrating state, and one end and the other end thereof are led out to the outside of the metal container.
【０００３】 この種の変流器で変流比を切り換え得るようにする場合には、１次導体を互い に絶縁された第１及び第２の１次導体に分割する。そして、第１の１次導体は金 属容器に対して絶縁した状態で設けてその一端及び他端を金属容器の外部に導出 し、第２の１次導体はその一端を金属容器に電気的に接続した状態で設けて、一 端及び他端を第１の１次導体の一端側及び他端側で金属容器の外部に導出する。 このように構成すると、第１の１次導体の他端を接続導体を介して第２の１次 導体の一端に接続して両１次導体を直列に接続したときに１次側が鉄心に対して ２ターンを構成し、第１の１次導体の一端及び他端をそれぞれ第２の１次導体の 一端及び他端に接続して両１次導体を並列に接続したときに１次側が鉄心に対し て１ターンを構成することになるので、第１及び第２の１次導体を直列に接続し たときと並列に接続したときとで、変流比を異ならせることができる。In order to be able to switch the current ratio in this type of current transformer, the primary conductor is divided into first and second primary conductors insulated from each other. Then, the first primary conductor is provided in an insulated state with respect to the metal container, and one end and the other end thereof are led out to the outside of the metal container, and the second primary conductor has one end electrically connected to the metal container. The first end and the other end are led out to the outside of the metal container at the one end and the other end of the first primary conductor. According to this structure, when the other end of the first primary conductor is connected to one end of the second primary conductor via the connecting conductor and both primary conductors are connected in series, the primary side is opposite to the iron core. Cores when the two primary conductors are connected in parallel by connecting one end and the other end of the first primary conductor to one end and the other end of the second primary conductor, respectively. On the other hand, since one turn is constituted, the current transformation ratio can be made different when the first and second primary conductors are connected in series and when they are connected in parallel.
【０００４】[0004]
従来の二重比変流器では、第１及び第２の１次導体を接続導体（電流の帰路を 構成する導体）を介して直列に接続したときに、該接続導体を流れる１次電流（ 以下帰路電流という。）により生じる磁束が２次ユニットの鉄心側を通過するた め、該鉄心の接続導体に近接する部分の磁束密度が大きくなる。そのため、鉄心 の断面積が適切でないと、過電流域において鉄心の部分飽和が生じ、誤差が大き くなるという問題があった。特に変流器をリレー用に使用する場合には、定格電 流の２０倍の電流に対する誤差や、直流分が含まれた過渡電流に対する誤差の範 囲が、規格に定められているが、従来の二重比変流器では、これらの誤差を規格 の範囲に収めることができないという問題があった。 In the conventional double ratio current transformer, when the first and second primary conductors are connected in series via a connection conductor (a conductor forming a return path for current), the primary current (current) flowing through the connection conductor ( Hereinafter, the magnetic flux generated by the return current) passes through the iron core side of the secondary unit, so that the magnetic flux density of the portion close to the connecting conductor of the iron core becomes large. Therefore, if the cross-sectional area of the iron core is not appropriate, there is a problem that the iron core is partially saturated in the overcurrent region and the error becomes large. Especially when using a current transformer for a relay, the standard defines an error range for a current that is 20 times the rated current and a transient current that includes a DC component. In the double ratio current transformer of, there was a problem that these errors could not be kept within the standard range.
【０００５】 鉄心の部分飽和を避けるためには、鉄心の断面積を大きくしておくか、または 各鉄心に均圧コイルを設ける等の対策を講じることが必要になるため、変流器が 大形化する上にコストが高くなるという問題があった。In order to avoid partial saturation of the iron core, it is necessary to increase the cross-sectional area of the iron core or to take measures such as providing a pressure equalizing coil on each iron core. There was a problem that the cost was high in addition to the modeling.
【０００６】 本考案の目的は、鉄心の部分飽和を防いで、過電流域における誤差特性を改善 することができるようにした二重比変流器を提供することにある。An object of the present invention is to provide a dual ratio current transformer capable of preventing partial saturation of an iron core and improving error characteristics in an overcurrent region.
【０００７】[0007]
請求項１及び２に記載した各考案は、筒状部と該筒状部の一端を閉鎖する蓋部 とを有している金属容器と、リング状の鉄心と該鉄心に巻回された２次コイルと を有して、上記金属容器内に配置された環状の２次ユニットと、金属容器内で２ 次ユニットの内側を貫通し、金属容器に対して絶縁された状態で設けられて、一 端及び他端が金属容器の筒状部から外部に導出された第１の１次導体と、第１の １次導体に対して絶縁された状態で設けられて第１の１次導体とともに２次ユニ ットの内側を貫通し、一端及び他端がそれぞれ第１の１次導体の一端側及び他端 側で金属容器の筒状部から外部に導出されて、一端が金属容器に電気的に接続さ れた第２の１次導体とを備えた二重比変流器に係わるものである。 According to each of the inventions described in claims 1 and 2, a metal container having a tubular portion and a lid portion that closes one end of the tubular portion, a ring-shaped iron core, and 2 wound around the iron core are provided. An annular secondary unit having a secondary coil arranged in the metal container, and a secondary coil that penetrates the inside of the secondary unit in the metal container and is insulated from the metal container. A first primary conductor whose one end and the other end are led out from the cylindrical portion of the metal container to the outside, and a first primary conductor which are provided in an insulated state with respect to the first primary conductor, together with the first primary conductor. It penetrates the inside of the secondary unit, and one end and the other end are led out to the outside from the cylindrical part of the metal container at one end side and the other end side of the first primary conductor, respectively, and one end is electrically connected to the metal container. And a second primary conductor that is electrically connected to the dual ratio current transformer.
【０００８】 請求項１に記載した考案においては、第１及び第２の１次導体を直列に接続す るために、金属容器の筒状部の外面に沿って配置されて第１の１次導体の他端と 第２の１次導体の一端との間を接続する直列接続用導体が設けられ、該直列接続 用導体を２次ユニットの鉄心から磁気遮蔽する磁気遮蔽板が設けられている。According to the first aspect of the invention, in order to connect the first and second primary conductors in series, the first primary conductor is arranged along the outer surface of the cylindrical portion of the metal container. A series connection conductor is provided to connect the other end of the conductor to one end of the second primary conductor, and a magnetic shield plate is provided to magnetically shield the series connection conductor from the iron core of the secondary unit. .
【０００９】 また請求項２に記載した考案においては、金属容器の蓋部が強磁性金属材料に より形成されている。第１及び第２の１次導体を直列に接続するための直列接続 用導体は良導電性を金属材料からなっていて、金属容器の蓋部の外面に沿って配 置されて第１の１次導体の他端と第２の１次導体の一端との間を接続する。According to the second aspect of the invention, the lid of the metal container is made of a ferromagnetic metal material. The series connection conductor for connecting the first and second primary conductors in series is made of a metal material having good conductivity, and is arranged along the outer surface of the lid portion of the metal container to form the first first conductor. The other end of the secondary conductor and one end of the second primary conductor are connected.
【００１０】 請求項３に記載した考案は、良導電性を有する非磁性金属材料からなる金属容 器と、リング状の鉄心と該鉄心に巻回された２次コイルとを有して金属容器内に 配置された環状の２次ユニットと、金属容器内で２次ユニットの内側を貫通し、 金属容器に対して絶縁された状態で設けられて、一端及び他端が金属容器の外部 に導出された第１の１次導体と、第１の１次導体に対して絶縁された状態で設け られて第１の１次導体とともに２次ユニットの内側を貫通し、一端及び他端がそ れぞれ第１の１次導体の一端側及び他端側で金属容器の外部に導出されて、一端 が金属容器に電気的に接続された第２の１次導体とを備えた二重比変流器に係わ るものである。According to a third aspect of the present invention, there is provided a metal container having a metal container made of a non-magnetic metal material having good conductivity, a ring-shaped iron core, and a secondary coil wound around the iron core. It is provided in a state in which the annular secondary unit arranged inside the secondary unit penetrates the inside of the secondary unit in the metal container and is insulated from the metal container, and one end and the other end are led to the outside of the metal container. And the first primary conductor, which is provided in an insulated state from the first primary conductor, penetrates the inside of the secondary unit together with the first primary conductor, and has one end and the other end. Each of the first and second primary conductors has a second primary conductor that is led out to the outside of the metal container at one end side and the other end side of the first primary conductor and has one end electrically connected to the metal container. It is related to the sink.
【００１１】 この考案においては、第１の１次導体の他端の近傍及び第２の１次導体の一端 の近傍にそれぞれ位置させて金属容器の外面に第１及び第２の導体接続部が設け られ、第１及び第２の１次導体を直列に接続する際には、第１の１次導体の他端 及び第２の１次導体の一端がそれぞれ第１及び第２の接続導体を介して第１及び 第２の導体接続部に接続される。In this invention, the first and second conductor connecting portions are provided on the outer surface of the metal container by being positioned near the other end of the first primary conductor and near one end of the second primary conductor, respectively. When connecting the first and second primary conductors in series, the other end of the first primary conductor and one end of the second primary conductor are connected to the first and second connection conductors, respectively. It is connected to the 1st and 2nd conductor connection part via.
【００１２】 本考案においては、第２の１次導体を管状に形成し、第１の１次導体を該第２ の１次導体の内側に同心的に配置するのが好ましい。この場合、第２の１次導体 は、その一端を金属容器に電気的に接続した状態で支持し、他端を絶縁物を介し て金属容器に支持する。また第１の１次導体は第２の１次導体に絶縁物を介して 支持する。In the present invention, it is preferable that the second primary conductor is formed in a tubular shape, and the first primary conductor is concentrically arranged inside the second primary conductor. In this case, the second primary conductor supports one end of the second primary conductor while being electrically connected to the metal container, and supports the other end of the second primary conductor to the metal container via an insulator. The first primary conductor is supported by the second primary conductor via an insulator.
【００１３】 なお本考案において、非磁性金属材料とは、強磁性金属材料以外の金属材料（ オーステナイト系ステンレス鋼、銅、アルミニウム、これらの合金等）を意味す る。In the present invention, the non-magnetic metal material means a metal material other than the ferromagnetic metal material (austenitic stainless steel, copper, aluminum, alloys thereof, etc.).
【００１４】[0014]
請求項１に記載した考案のように、第１及び第２の１次導体を直列に接続する 際に直列接続用導体を金属容器の筒状部の外面に沿うように設けるとともに、該 直列接続用導体を２次ユニットの鉄心から磁気遮蔽するための磁気遮蔽板を設け ると、直列接続用導体を流れる帰路電流により生じる磁束が２次ユニットの鉄心 側に流れるのを抑制することができるため、該鉄心の直列接続用導体に近接する 部分の磁束密度の増大を抑制することができる。従って、直列接続用導体を流れ る帰路電流により鉄心の特定部分が磁気的に飽和するのを防ぐことができ、鉄心 の断面積を大きくしたり、均圧巻線を設けたりすることなく、過電流域での誤差 を規格範囲内に収めることができる。 As in the invention described in claim 1, when connecting the first and second primary conductors in series, a series connection conductor is provided along the outer surface of the cylindrical portion of the metal container, and the series connection is performed. If a magnetic shield plate is provided to magnetically shield the work conductor from the iron core of the secondary unit, the magnetic flux generated by the return current flowing through the series connection conductor can be suppressed from flowing to the iron core side of the secondary unit. Therefore, it is possible to suppress an increase in the magnetic flux density in the portion of the iron core that is close to the series connection conductor. Therefore, it is possible to prevent magnetic saturation of a specific part of the iron core due to the return current flowing through the series connection conductor, without increasing the cross-sectional area of the iron core and without providing a pressure equalizing winding. The error in the basin can be kept within the standard range.
【００１５】 また請求項２に記載した考案のように、金属容器の蓋部を強磁性金属材料によ り形成し、第１及び第２の１次導体を直列に接続するための直列接続用導体を良 導電性金属材料により形成して、該直列接続用導体を金属容器の蓋部の外面に沿 って配置して第１の１次導体の他端と第２の１次導体の一端との間を接続するよ うにすると、直列接続用導体を流れる帰路電流により生じた磁束は殆ど強磁性金 属材料からなる金属容器の蓋部を流れ、金属容器内に配置された２次ユニットの 鉄心には殆ど流れない。従って、２次ユニットの鉄心の磁束密度の増大を抑制す ることができ、該鉄心の部分飽和が生じるのを防ぐことができる。そのため、鉄 心の断面積を大きくしたり、均圧巻線を設けたりすることなく、過電流域での変 流器の誤差を少なくすることができる。Further, as in the invention described in claim 2, for the serial connection for connecting the lid of the metal container with the ferromagnetic metal material and connecting the first and second primary conductors in series The conductor is formed of a good conductive metal material, and the series connection conductor is arranged along the outer surface of the lid of the metal container to form the other end of the first primary conductor and one end of the second primary conductor. If the connection is made between the and, the magnetic flux generated by the return current flowing through the series connection conductor will flow through the lid of the metal container that is mostly made of ferromagnetic metal, and the magnetic flux of the secondary unit placed in the metal container. It hardly flows into the iron core. Therefore, it is possible to suppress an increase in the magnetic flux density of the iron core of the secondary unit and prevent partial saturation of the iron core. Therefore, it is possible to reduce the error of the current transformer in the overcurrent region without increasing the cross-sectional area of the iron core or providing the equalizing winding.
【００１６】 更に、請求項３に記載した考案のように、第１の１次導体の他端の近傍及び第 ２の１次導体の一端の近傍にそれぞれ位置させて金属容器の外面に第１及び第２ の導体接続部を設けて、第１及び第２の１次導体を直列に接続する際に、第１の １次導体の他端及び第２の１次導体の一端をそれぞれ第１及び第２の接続導体を 介して第１及び第２の導体接続部に接続するようにすると、第１及び第２の１次 導体を直列に接続した際に、帰路電流が金属容器を通して流れることになるため 、該帰路電流が特定の部分に集中することがない。従って、第１及び第２の１次 導体を直列に接続した場合に、帰路電流により生じる磁束を分散させることがで き、帰路電流による磁束が２次ユニットの鉄心の特定の部分に流れて鉄心の部分 飽和を生じさせるのを防ぐことができる。Further, according to a third aspect of the present invention, the first primary conductor is located near the other end and near the one end of the second primary conductor, and the first primary conductor is provided on the outer surface of the metal container. And a second conductor connecting portion are provided, and when the first and second primary conductors are connected in series, the other end of the first primary conductor and one end of the second primary conductor are respectively connected to the first By connecting the first and second conductors via the first and second connection conductors, the return current will flow through the metal container when the first and second primary conductors are connected in series. Therefore, the return current does not concentrate on a specific portion. Therefore, when the first and second primary conductors are connected in series, the magnetic flux generated by the return current can be dispersed, and the magnetic flux due to the return current flows to a specific part of the iron core of the secondary unit and Can be prevented from causing partial saturation.
【００１７】[0017]
図１ないし図４は請求項１に記載した考案の実施例を示したもので、図１ない し図３は２つの１次導体を直列接続した状態を示し、図４は２つの１次導体を並 列接続した状態を示している。 1 to 4 show an embodiment of the invention described in claim 1, FIG. 1 or FIG. 3 shows a state in which two primary conductors are connected in series, and FIG. 4 shows two primary conductors. It shows a state in which are connected in parallel.
【００１８】 これらの図において、１は金属容器で、この金属容器は、円筒状に形成されて 軸線を垂直方向に向けて配置された筒状部１０１と、該筒状部の上端を閉鎖する ように設けられた蓋部１０２とを有する。筒状部１０１と蓋部１０２とは一体に 形成しても良く、筒状部１０１の上端に蓋１０２を溶接により接合する構造をと っても良い。金属容器１の下端には内フランジ１０３が設けられ、上下方向に直 線的に延びる比較的長い碍管２の上端に取り付けられたフランジ板３がフランジ １０３に接続されて金属容器１内が密閉される。碍管２の下端は２次端子箱を兼 ねる図示しない基台に支持され、碍管２を介して金属容器１が大地電位部に対し て支持されている。フランジ板３には、碍管２の上端付近の電界を緩和するシー ルド５が取り付けられている。In these drawings, reference numeral 1 denotes a metal container, which is formed into a cylindrical shape and has a cylindrical portion 101 arranged with its axis oriented in the vertical direction, and an upper end of the cylindrical portion is closed. And a lid portion 102 provided as described above. The tubular portion 101 and the lid portion 102 may be integrally formed, or the lid 102 may be joined to the upper end of the tubular portion 101 by welding. An inner flange 103 is provided at the lower end of the metal container 1, and a flange plate 3 attached to the upper end of a relatively long porcelain insulator 2 extending straight in the vertical direction is connected to the flange 103 to seal the inside of the metal container 1. It The lower end of the porcelain bushing 2 is supported by a base (not shown) that also serves as a secondary terminal box, and the metal container 1 is supported by the porcelain bushing 2 with respect to the ground potential portion. A shield 5 is attached to the flange plate 3 to reduce the electric field near the upper end of the porcelain bushing 2.
【００１９】 碍管２内には下端が基台に支持された金属パイプ４が同心的に配置され、金属 容器１内に位置する金属パイプ４の上端に環状を成す２次ユニット６が支持され ている。A metal pipe 4 having a lower end supported by a base is concentrically arranged in the insulator 2 and an annular secondary unit 6 is supported by the upper end of the metal pipe 4 located in the metal container 1. There is.
【００２０】 ２次ユニット６は、複数（図示の例では４個）のリング状の鉄心６０１と、該 鉄心に巻回された２次コイル（図示せず）とをドーナツ状のシールドケース６０ ２内に収納したもので、鉄心６０１の中心軸線を金属容器１の中心軸線と直交さ せた状態で該容器内に配置されて、その下部が金属パイプ４の上端に接続されて いる。図示してないが、２次ユニット６を強固に支えるため、通常は該２次ユニ ットをフランジ３に対して支持する棒状の絶縁支持物が設けられるか、または金 属パイプ４の上端付近をフランジ３に対して支持する絶縁スペーサが設けられる 。なお金属パイプ４の上端を絶縁スペーサによりフランジ３に支持する場合、該 絶縁スペーサは金属容器１内の空間と碍管２内の空間とを連通させるように設け られる。The secondary unit 6 includes a plurality (four in the illustrated example) of ring-shaped iron cores 601 and a secondary coil (not shown) wound around the iron cores and has a donut-shaped shield case 60 2. The iron core 601 is housed in the metal container 1 with the central axis line of the iron core 601 being orthogonal to the central axis line of the metal container 1, and the lower part thereof is connected to the upper end of the metal pipe 4. Although not shown, in order to firmly support the secondary unit 6, a rod-shaped insulating support for supporting the secondary unit with respect to the flange 3 is usually provided, or near the upper end of the metal pipe 4. An insulating spacer is provided to support the with respect to the flange 3. When the upper end of the metal pipe 4 is supported on the flange 3 by an insulating spacer, the insulating spacer is provided so as to connect the space inside the metal container 1 and the space inside the insulator 2 to each other.
【００２１】 ２次コイルからの引き出し線は金属パイプ４内を通して、下端に設けられた２ 次端子箱内の２次端子に接続されている。The lead wire from the secondary coil passes through the metal pipe 4 and is connected to the secondary terminal in the secondary terminal box provided at the lower end.
【００２２】 金属容器１内にはまた、第１の１次導体７と第２の１次導体８とから成る１次 導体９が、２次ユニット６の内側を貫通した状態で配置されている。１次導体９ を取り付けるため、金属容器１の筒状部１０１の側壁の相対する箇所を貫通させ て、１対の１次導体取り付け孔１０４及び１０５が設けられている。これらの取 り付け孔は、それぞれの中心軸線が２次ユニット６の中心軸線と一致するように 設けられている。In the metal container 1, a primary conductor 9 composed of a first primary conductor 7 and a second primary conductor 8 is also arranged in a state of penetrating the inside of the secondary unit 6. . In order to mount the primary conductor 9, a pair of primary conductor mounting holes 104 and 105 are provided by penetrating opposite portions of the side wall of the tubular portion 101 of the metal container 1. These mounting holes are provided so that their respective central axes coincide with the central axis of the secondary unit 6.
【００２３】 第２の１次導体８は管状に形成されていて、該第２の１次導体８の一端８ａ及 び他端８ｂが取り付け孔１０４及び１０５を貫通した状態で配置されている。第 ２の１次導体８の一端８ａにはフランジ金具８ｃが溶接され、該フランジ金具８ ｃが取り付け孔１０４の周辺部に設けられたフランジにシール用ガスケットを介 して当接されている。フランジ金具８ｃはボルト１０により取り付け孔１０４の 周辺部に設けられたフランジに接続され、１次導体８の一端８ａがフランジ金具 ８ｃとボルト１０とを介して金属容器１に電気的に接続されている。第２の１次 導体８の他端８ｂは、取り付け孔１０５の周辺部に設けられたフランジにボルト １１により固定された絶縁スペーサ１２にガスケットを介して支持されている。 従って、第２の１次導体８は、その一端が金属容器１に電気的に接続され、他端 が金属容器１に対して絶縁された状態で支持されている。The second primary conductor 8 is formed in a tubular shape, and is arranged such that one end 8 a and the other end 8 b of the second primary conductor 8 penetrate the mounting holes 104 and 105. A flange metal fitting 8c is welded to one end 8a of the second primary conductor 8, and the flange metal fitting 8c is in contact with a flange provided in the peripheral portion of the mounting hole 104 via a sealing gasket. The flange metal fitting 8c is connected to a flange provided around the mounting hole 104 by a bolt 10, and one end 8a of the primary conductor 8 is electrically connected to the metal container 1 via the flange metal fitting 8c and the bolt 10. There is. The other end 8b of the second primary conductor 8 is supported via a gasket by an insulating spacer 12 fixed by a bolt 11 to a flange provided around the mounting hole 105. Therefore, the second primary conductor 8 is supported with its one end electrically connected to the metal container 1 and the other end insulated from the metal container 1.
【００２４】 第２の１次導体８の一端８ａ及び他端８ｂは金属容器１の外部に所定長さだけ 突出するように設けられていて、金属容器１の外部に突出した１次導体８の一端 ８ａ及び他端８ｂにそれぞれ端子部Ｋ2 及びＬ2 が形成されている。One end 8 a and the other end 8 b of the second primary conductor 8 are provided so as to protrude outside the metal container 1 by a predetermined length, and the primary conductor 8 protruding outside the metal container 1 Terminal portions K2 and L2 are formed at one end 8a and the other end 8b, respectively.
【００２５】 第１の１次導体７は、第２の１次導体８の内径よりも小さい外径を有する棒状 または中空管状に形成されている。この第１の１次導体７は、第２の１次導体８ の内側に同心的に配置されて、その一端７ａ及び他端７ｂがそれぞれ絶縁スペー サ１３及び１４を介して第２の１次導体８の一端及び他端に支持されている。即 ち、第１の１次導体７は、第２の１次導体８及び金属容器１に対して絶縁された 状態で設けられている。第１の１次導体７の一端及び他端にはそれぞれ板状に成 形された端子部Ｋ1 及びＬ1 が設けられている。The first primary conductor 7 is formed in a rod shape or a hollow tubular shape having an outer diameter smaller than the inner diameter of the second primary conductor 8. The first primary conductor 7 is arranged concentrically inside the second primary conductor 8 and one end 7a and the other end 7b thereof are respectively connected to the second primary conductor 8 via insulating spacers 13 and 14. It is supported on one end and the other end of the conductor 8. That is, the first primary conductor 7 is provided in a state of being insulated from the second primary conductor 8 and the metal container 1. The first primary conductor 7 is provided at its one end and the other end with plate-shaped terminal portions K1 and L1, respectively.
【００２６】 本実施例では、第２の１次導体８の一端側の端子部Ｋ2 が第１の１次導体７の 一端側の端子部Ｋ1 よりも下方に位置し、第２の１次導体８の他端側の端子部Ｌ 2 が第１の１次導体７の他端側の端子部Ｌ1 よりも上方に位置するように設けら れている。In the present embodiment, the terminal portion K2 on the one end side of the second primary conductor 8 is located below the terminal portion K1 on the one end side of the first primary conductor 7, and the second primary conductor The terminal portion L 2 on the other end side of 8 is provided above the terminal portion L 1 on the other end side of the first primary conductor 7.
【００２７】 この種の変流器では、１次導体７及び８を流れる１次電流により金属容器１に 渦電流が生じ、該渦電流により発熱を生じる。この発熱を抑制するため、金属容 器１の少なくとも筒状部１０１はオーステナイト系ステンレス鋼等の非磁性金属 材料により形成される。蓋部１０２は非磁性金属材料からなっていても良く、鉄 等の強磁性金属材料からなっていても良い。金属容器１内及び碍管２内の空間は 完全に密閉され、該空間にＳＦ6 ガスが大気圧以上の所定の圧力で封入されてい る。In this type of current transformer, an eddy current is generated in the metal container 1 by the primary current flowing through the primary conductors 7 and 8, and heat is generated by the eddy current. In order to suppress this heat generation, at least the tubular portion 101 of the metal container 1 is formed of a nonmagnetic metal material such as austenitic stainless steel. The lid 102 may be made of a non-magnetic metal material or a ferromagnetic metal material such as iron. The space inside the metal container 1 and the porcelain insulator 2 is completely sealed, and SF 6 gas is sealed in the space at a predetermined pressure of atmospheric pressure or higher.
【００２８】 第１及び第２の１次導体７及び８を直列に接続する場合には、図１ないし図３ に示すように、直列接続用導体１５が設けられて、この導体１５により、第２の １次導体８の一端８ａ側の端子Ｋ2 と第１の１次導体７の他端７ｂ側の端子Ｌ1 との間が接続される。直列接続用導体１５は、金属容器１の筒状部１０１の周方 向に伸びて、該筒状部１０１の外周面のほぼ半部に均一な間隔を保って対向する ように円弧状に湾曲された帯板状の導体からなり、その一端及び他端にはそれぞ れ接続金具１６及び１７の一端が接続されている。直列接続用導体１５は、２次 ユニット６の鉄心６０１の下端付近に相応する位置に配置されて、接続金具１６ の他端が第１の１次導体７の他端７ｂ側の端子部Ｌ１にボルトにより接続され、 接続金具１７の他端は第２の１次導体８の一端８ａ側の端子部Ｋ2 にボルトによ り接続されている。従って、第１の１次導体７と第２の１次導体８とは、接続金 具１６及び１７と直列接続用導体１５とを介して互いに直列に接続されている。 また本実施例では、直列接続用導体１５の一端及び他端がそれぞれ金属容器１ の外周面に固定された絶縁板１８及び１９に当接され、直列接続用導体１５の中 間部が金属容器１の外周面に固定された絶縁板２０に当接されている。直列接続 用導体１５の一端、他端及び中間部はそれぞれ絶縁板１８，１９及び２０にボル ト２１により固定されている。When the first and second primary conductors 7 and 8 are connected in series, a series connection conductor 15 is provided as shown in FIGS. The terminal K2 on one end 8a side of the second primary conductor 8 and the terminal L1 on the other end 7b side of the first primary conductor 7 are connected. The serial connection conductor 15 extends in the circumferential direction of the tubular portion 101 of the metal container 1 and is curved in an arc shape so as to face almost half of the outer peripheral surface of the tubular portion 101 at a uniform interval. It is made of a strip-shaped conductor and has one end and the other end connected to one end of the connection fittings 16 and 17, respectively. The series connection conductor 15 is arranged at a position corresponding to the vicinity of the lower end of the iron core 601 of the secondary unit 6, and the other end of the connection fitting 16 is connected to the terminal portion L1 on the other end 7b side of the first primary conductor 7. It is connected by a bolt, and the other end of the connection fitting 17 is connected by a bolt to the terminal portion K2 on the side of the one end 8a of the second primary conductor 8. Therefore, the first primary conductor 7 and the second primary conductor 8 are connected in series with each other via the connection tools 16 and 17 and the series connection conductor 15. Further, in this embodiment, one end and the other end of the serial connection conductor 15 are brought into contact with the insulating plates 18 and 19 fixed to the outer peripheral surface of the metal container 1, respectively, and the middle portion of the serial connection conductor 15 is placed in the metal container. It is in contact with an insulating plate 20 fixed to the outer peripheral surface of 1. One end, the other end, and the intermediate portion of the series connection conductor 15 are fixed to the insulating plates 18, 19 and 20 by bolts 21, respectively.
【００２９】 第１の１次導体７の一端側の端子部Ｋ1 には舌片状の端子金具２２がボルトに より接続され、第２の１次導体８の他端側の端子部Ｌ2 には、同じく舌片状の端 子金具２３がボルトにより接続されている。A tongue-shaped terminal fitting 22 is connected to the terminal portion K1 on one end side of the first primary conductor 7 by a bolt, and a terminal portion L2 on the other end side of the second primary conductor 8 is connected to the terminal portion L2. Similarly, a tongue-shaped terminal fitting 23 is connected by a bolt.
【００３０】 端子金具２２及び２３はそれぞれ電源側の主回路導体及び負荷側の主回路導体 に接続され、端子金具２２−第１の１次導体７−端子金具１６−直列接続用導体 １５−第２の１次導体８−端子金具２３の経路で１次電流が流れる。The terminal fittings 22 and 23 are respectively connected to the main circuit conductor on the power supply side and the main circuit conductor on the load side, and the terminal fitting 22-first primary conductor 7-terminal fitting 16-series connection conductor 15-third The primary current flows through the path of the secondary conductor 8 of 2 to the terminal fitting 23.
【００３１】 金属容器１の筒状部１０１の内周面の直列接続用導体１５に相応する位置には 、直列接続用導体１５を２次ユニットの鉄心６０１から磁気遮蔽するための磁気 遮蔽板２５が取付けられている。この磁気遮蔽板２５は珪素鋼板や鉄板等の強磁 性金属材料からなっていて、金属容器１の筒状部の内周面に密着するように半円 弧状に湾曲され、金属容器１の内周面に当接されて、ネジ止め等の適宜の手段に より金属容器１に固定されている。A magnetic shield plate 25 for magnetically shielding the serial connection conductor 15 from the iron core 601 of the secondary unit at a position corresponding to the serial connection conductor 15 on the inner peripheral surface of the tubular portion 101 of the metal container 1. Is installed. The magnetic shield plate 25 is made of a strong magnetic metal material such as a silicon steel plate or an iron plate, and is curved in a semicircular arc shape so as to be in close contact with the inner peripheral surface of the cylindrical portion of the metal container 1, and It is in contact with the peripheral surface and is fixed to the metal container 1 by appropriate means such as screwing.
【００３２】 上記のように、第１及び第２の１次導体７及び８を直列に接続すると、１次導 体が鉄心６０１に対して２ターンを構成する。この場合、直列接続用導体１５を 通して１次電流が流れるため、該直列接続用導体１５の周囲に磁界が生じ、鉄心 ６０１側に磁束が流れようとするが、上記のように、直列接続用導体１５を２次 ユニットの鉄心６０１から磁気遮蔽するための磁気遮蔽板２５を設けると、直列 接続用導体を流れる１次電流により生じる磁束が２次ユニットの鉄心側に流れる のを抑制することができる。そのため、鉄心６０１の直列接続用導体２５に近接 した部分の磁束密度の増大を抑制することができ、鉄心の直列接続用導体に近接 した特定部分が磁気的に飽和するのを防ぐことができる。従って、鉄心６０１の 断面積を大きくしたり、均圧巻線を設けたりすることなく、過電流域での誤差を 規格範囲内に収めることができる。As described above, when the first and second primary conductors 7 and 8 are connected in series, the primary conductor forms two turns with respect to the iron core 601. In this case, since the primary current flows through the series connection conductor 15, a magnetic field is generated around the series connection conductor 15 and the magnetic flux tends to flow to the iron core 601 side. Providing the magnetic shield plate 25 for magnetically shielding the working conductor 15 from the iron core 601 of the secondary unit suppresses the magnetic flux generated by the primary current flowing through the series connection conductor from flowing to the iron core side of the secondary unit. You can Therefore, it is possible to suppress an increase in magnetic flux density in a portion of the iron core 601 which is close to the series connection conductor 25, and to prevent magnetic saturation of a specific portion of the iron core 601 which is close to the series connection conductor 25. Therefore, the error in the overcurrent region can be kept within the standard range without increasing the cross-sectional area of the iron core 601 or providing the equalizing winding.
【００３３】 図４は、上記実施例において第１及び第２の１次導体７及び８を並列に接続し た状態を示したもので、この例では、第１の１次導体７の一端側の端子部Ｋ1 と 第２の１次導体８の一端側の端子部Ｋ2 との間に接続導体２６と端子金具２２と の積層体が挿入され、端子部Ｋ1 と端子金具２２と接続導体２６と端子部Ｋ2 と がボルト２７及びナット２８により締結されて、第１及び第２の１次導体の一端 どうしが相互に接続されている。また第１の１次導体７の他端側の端子部Ｌ1 と 第２の１次導体８の他端側の端子部Ｌ2 との間に接続導体２９と端子金具２３と の積層体が挿入され、端子部Ｌ2 と接続導体２９と端子金具２３と端子部Ｌ1 と がボルト３０及びナット３１により締結されて、第１及び第２の１次導体の他端 どうしが相互に接続されている。FIG. 4 shows a state in which the first and second primary conductors 7 and 8 are connected in parallel in the above embodiment. In this example, one end side of the first primary conductor 7 is shown. The laminated body of the connecting conductor 26 and the terminal fitting 22 is inserted between the terminal portion K1 of the above and the terminal portion K2 on the one end side of the second primary conductor 8 to connect the terminal portion K1, the terminal fitting 22 and the connecting conductor 26 to each other. The terminal portion K2 is fastened with a bolt 27 and a nut 28 so that one ends of the first and second primary conductors are connected to each other. A laminated body of the connecting conductor 29 and the terminal fitting 23 is inserted between the terminal portion L1 on the other end side of the first primary conductor 7 and the terminal portion L2 on the other end side of the second primary conductor 8. The terminal portion L2, the connecting conductor 29, the terminal fitting 23, and the terminal portion L1 are fastened together by bolts 30 and nuts 31, and the other ends of the first and second primary conductors are connected to each other.
【００３４】 このように、第１及び第２の１次導体を並列に接続した状態では、１次導体が 鉄心６０１に対して１ターンを構成するため、両１次導体を直列接続した場合よ りも変流比が大きくなる。As described above, in the state where the first and second primary conductors are connected in parallel, the primary conductor constitutes one turn with respect to the iron core 601, and therefore, when both primary conductors are connected in series. The current change ratio becomes large.
【００３５】 上記の実施例においては、金属容器１の内面に磁気遮蔽板２５を取り付けてい るが、磁気遮蔽板２５を金属容器１の外面に取り付けることもできる。In the above embodiment, the magnetic shield plate 25 is attached to the inner surface of the metal container 1, but the magnetic shield plate 25 may be attached to the outer surface of the metal container 1.
【００３６】 図５ないし図７は請求項２に記載した考案の実施例を示したもので、この実施 例では、金属容器１の筒状部１０１がオーステナイト系ステンレス鋼等の非磁性 金属材料からなり、蓋部１０２が鉄等の強磁性金属材料からなっている。蓋部１ ０２は筒状部１０１の上端に溶接により接合されている。5 to 7 show an embodiment of the invention described in claim 2, in which the tubular portion 101 of the metal container 1 is made of a non-magnetic metal material such as austenitic stainless steel. The lid 102 is made of a ferromagnetic metal material such as iron. The lid portion 102 is joined to the upper end of the tubular portion 101 by welding.
【００３７】 第１及び第２の１次導体７及び８は前記の実施例と同様に２次ユニット６を貫 通した状態で設けられて、金属容器１に支持されているが、この実施例では、第 ２の１次導体８の一端８ａ側の端子部Ｋ2 が第１の１次導体７の一端７ａ側の端 子部Ｋ1 よりも上方に位置するように設けられ、第２の１次導体の他端８ｂ側の 端子部Ｌ2 が第１の１次導体７の他端側の端子部Ｌ1 よりも下方に位置するよう に設けられている。The first and second primary conductors 7 and 8 are provided so as to penetrate the secondary unit 6 and are supported by the metal container 1 as in the above-described embodiment. Is provided so that the terminal portion K2 on the one end 8a side of the second primary conductor 8 is located higher than the terminal portion K1 on the one end 7a side of the first primary conductor 7. The terminal portion L2 on the other end 8b side of the conductor is provided below the terminal portion L1 on the other end side of the first primary conductor 7.
【００３８】 直列接続用導体１５´は、金属容器１の蓋部１０２の外面に均一な間隔を保っ て対向するように蓋部の曲率に応じて湾曲された帯板状の導体からなり、その一 端及び他端にはそれぞれ接続金具１６´及び１７´の一端が接続されている。直 列接続用導体１５´は、蓋部１０２の中央部を通るように配置されていて、接続 金具１６´の他端が第１の１次導体７の他端７ｂ側の端子部Ｌ１にボルトにより 接続され、接続金具１７´の他端は第２の１次導体８の一端８ａ側の端子部Ｋ2 にボルトにより接続されている。直列接続用導体１５´の一端及び他端はそれぞ れ金属容器１の外面に固定された絶縁板１８´及び１９´に当接され、直列接続 用導体１５´の中間部は金属容器１の外周面に固定された絶縁板２０´に当接さ れている。直列接続用導体１５´の一端、他端及び中間部はそれぞれ絶縁板１８ ´，１９´及び２０´にボルト２１´により固定されている。その他の点は前記 実施例と同様である。The series-connecting conductor 15 ′ is made of a strip-shaped conductor curved according to the curvature of the lid so as to face the outer surface of the lid 102 of the metal container 1 at a uniform interval. One ends of connection fittings 16 'and 17' are connected to one end and the other end, respectively. The serial connection conductor 15 'is arranged so as to pass through the central portion of the lid portion 102, and the other end of the connection fitting 16' is bolted to the terminal portion L1 on the other end 7b side of the first primary conductor 7. The other end of the connection fitting 17 'is connected to the terminal portion K2 on the one end 8a side of the second primary conductor 8 by a bolt. One end and the other end of the serial connection conductor 15 'are brought into contact with the insulating plates 18' and 19 'fixed to the outer surface of the metal container 1, respectively, and the intermediate portion of the serial connection conductor 15' is connected to the metal container 1. It is in contact with an insulating plate 20 'fixed to the outer peripheral surface. One end, the other end and the intermediate portion of the serial connection conductor 15 'are fixed to the insulating plates 18', 19 'and 20' by bolts 21 ', respectively. The other points are the same as in the above-mentioned embodiment.
【００３９】 本実施例において、第１及び第２の１次導体７及び８を並列に接続した状態は 図７に示した通りで、その接続構造は図１ないし図４に示した実施例と同様であ る。In this embodiment, the state in which the first and second primary conductors 7 and 8 are connected in parallel is as shown in FIG. 7, and the connection structure is the same as that of the embodiment shown in FIGS. 1 to 4. The same is true.
【００４０】 本実施例のように、金属容器１の蓋部１０２を強磁性金属材料により形成する とともに、第１及び第２の１次導体７及び８を直列に接続するための直列接続用 導体１５´を金属容器１の蓋部の外面に沿って配置して第１の１次導体７の他端 側の端子部Ｌ1 と第２の１次導体８の一端側の端子部Ｋ2 との間を接続するよう にすると、直列接続用導体１５´を流れる帰路電流により生じた磁束は殆ど強磁 性金属材料からなる金属容器１の蓋部を流れ、金属容器内に配置された２次ユニ ット６の鉄心には殆ど流れない。従って、２次ユニットの鉄心６０１の磁束密度 の増大を抑制することができ、該鉄心の部分飽和が生じるのを防ぐことができる 。そのため、鉄心の断面積を大きくしたり、均圧巻線を設けたりすることなく、 過電流域での変流器の誤差を少なくすることができる。As in the present embodiment, the lid portion 102 of the metal container 1 is formed of a ferromagnetic metal material, and a series connection conductor for connecting the first and second primary conductors 7 and 8 in series. 15 'is arranged along the outer surface of the lid portion of the metal container 1 and is provided between the terminal portion L1 on the other end side of the first primary conductor 7 and the terminal portion K2 on the one end side of the second primary conductor 8. , The magnetic flux generated by the return current flowing through the serial connection conductor 15 ′ flows through the lid of the metal container 1 made of a strong magnetic metal material, and the secondary unit placed in the metal container is connected. It hardly flows into the iron core of G6. Therefore, the increase in the magnetic flux density of the iron core 601 of the secondary unit can be suppressed, and the partial saturation of the iron core can be prevented. Therefore, the error of the current transformer in the overcurrent region can be reduced without increasing the cross-sectional area of the iron core or providing the pressure equalizing winding.
【００４１】 次に図８及び図９は請求項３に記載した考案の実施例を示したもので、この実 施例では、金属容器１の筒状部１０１及び蓋部１０２がともにアルミニウムや銅 等の良導電性を有する非磁性金属材料により形成される。本実施例では、金属容 器１全体がアルミニウムの鋳物からなり、第１の１次導体７の他端７ｂ側の端子 部Ｌ1 の近傍及び第２の１次導体８の一端８ａ側の端子部Ｋ2 の近傍にそれぞれ 位置させて、金属容器１の外面に第１及び第２の導体接続部１０３及び１０４が 設けられている。これらの導体接続部は、容器の筒状部の一部の肉厚を厚くする ことにより形成した台座部からなっていて、導体接続部１０３及び１０４にはそ れぞれネジ孔１０５及び１０６（図９参照）が設けられている。２次ユニット６ の取り付け構造と第１及び第２の１次導体７及び８の取り付け構造は図１ないし 図４に示した実施例と同様である。Next, FIGS. 8 and 9 show an embodiment of the invention described in claim 3. In this embodiment, both the tubular portion 101 and the lid portion 102 of the metal container 1 are made of aluminum or copper. And the like are formed of a nonmagnetic metal material having good conductivity. In this embodiment, the entire metal container 1 is made of cast aluminum, and is located near the terminal portion L1 on the other end 7b side of the first primary conductor 7 and on the one end 8a side of the second primary conductor 8. First and second conductor connecting portions 103 and 104 are provided on the outer surface of the metal container 1 respectively located near K2. These conductor connecting portions are pedestals formed by increasing the thickness of a part of the tubular portion of the container, and the conductor connecting portions 103 and 104 have screw holes 105 and 106 (respectively). 9) is provided. The mounting structure of the secondary unit 6 and the mounting structure of the first and second primary conductors 7 and 8 are the same as those of the embodiment shown in FIGS.
【００４２】 この実施例において、第１及び第２の１次導体７及び８を直列に接続する際に は、図８に示したように、第１の１次導体７の他端側の端子部Ｌ1 及び第２の１ 次導体８の一端側の端子部Ｋ2 がそれぞれ第１及び第２の接続導体３２及び３３ を介して第１及び第２の導体接続部１０３及び１０４に接続される。第１及び第 ２の接続導体３２及び３３はそれぞれ可撓性を有する導体３２ａ及び３３ａの両 端に端子板３２ｂ，３２ｃ及び３３ｂ，３３ｃを接続したものからなり、端子板 ３２ｂ及び３３ｂがそれぞれ端子部Ｌ1 及びＫ2 に、また端子板３２ｃ及び３３ ｃが第１及び第２の導体接続部１０３及び１０４にそれぞれボルトにより接続さ れている。In this embodiment, when connecting the first and second primary conductors 7 and 8 in series, as shown in FIG. 8, the terminal on the other end side of the first primary conductor 7 is connected. The portion L1 and the terminal portion K2 on one end side of the second primary conductor 8 are connected to the first and second conductor connecting portions 103 and 104 via the first and second connecting conductors 32 and 33, respectively. The first and second connection conductors 32 and 33 are composed of flexible conductors 32a and 33a, respectively, to which terminal plates 32b, 32c and 33b, 33c are connected at both ends, and the terminal plates 32b and 33b are respectively connected to terminals. The parts L1 and K2 and the terminal plates 32c and 33c are connected to the first and second conductor connecting parts 103 and 104 by bolts, respectively.
【００４３】 第１及び第２の１次導体７及び８を並列に接続する際には、図９に示したよう に、第１及び第２の接続導体３２及び３３の端子板３２ｃ及び３３ｃをそれぞれ 第２の１次導体８の他端側の端子部Ｌ2 及び第１の１次導体７の一端側の端子部 Ｋ1 にボルトにより接続することにより、第１及び第２の１次導体７及び８の一 端側の端子どうし及び他端側の端子どうしを接続する。その他の点は図１ないし 図４に示した実施例と同様である。When connecting the first and second primary conductors 7 and 8 in parallel, the terminal plates 32c and 33c of the first and second connection conductors 32 and 33 are connected as shown in FIG. By connecting the terminal portion L2 on the other end side of the second primary conductor 8 and the terminal portion K1 on the one end side of the first primary conductor 7 with bolts, respectively, the first and second primary conductors 7 and Connect the terminals on one end side of 8 and the terminals on the other end side. The other points are similar to those of the embodiment shown in FIGS.
【００４４】 図８及び図９に示した実施例のように、第１の１次導体７の他端７ｂの近傍及 び第２の１次導体８の一端８ａの近傍にそれぞれ位置させて金属容器の外面に第 １及び第２の導体接続部１０３及び１０４を設けて、第１及び第２の１次導体を 直列に接続する際に、第１の１次導体７の他端側の端子部Ｌ1 及び第２の１次導 体８の一端側の端子部Ｋ2 をそれぞれ第１及び第２の接続導体３２及び３３を介 して第１及び第２の導体接続部１０３及び１０４に接続するようにすると、第１ 及び第２の１次導体７及び８を直列に接続した際に、帰路電流が金属容器１を通 して流れることになる。そのため、該帰路電流が特定の部分に集中することがな くなり、第１及び第２の１次導体７及び８を直列に接続した場合に、帰路電流に より生じる磁束を分散させることができる。従って、帰路電流による磁束が２次 ユニット６の鉄心６０１の特定の部分に流れて鉄心の部分飽和を生じさせるのを 防ぐことができ、過電流域での誤差を少なくして、リレー用変流器の規格に定め られた定格の２０倍の電流による誤差や、一次電流に直流分が含まれる過渡状態 での誤差を改善することができる。As in the embodiment shown in FIGS. 8 and 9, the metal is placed near the other end 7 b of the first primary conductor 7 and near one end 8 a of the second primary conductor 8, respectively. When the first and second conductor connecting portions 103 and 104 are provided on the outer surface of the container to connect the first and second primary conductors in series, the terminal on the other end side of the first primary conductor 7 The portion L1 and the terminal portion K2 on one end side of the second primary conductor 8 are connected to the first and second conductor connecting portions 103 and 104 via the first and second connecting conductors 32 and 33, respectively. By doing so, when the first and second primary conductors 7 and 8 are connected in series, a return current flows through the metal container 1. Therefore, the return current does not concentrate on a specific portion, and when the first and second primary conductors 7 and 8 are connected in series, the magnetic flux generated by the return current can be dispersed. . Therefore, it is possible to prevent the magnetic flux due to the return current from flowing to a specific portion of the iron core 601 of the secondary unit 6 and causing partial saturation of the iron core, reduce the error in the overcurrent region, and reduce the current for relay. It is possible to improve the error due to the current 20 times the rated value specified in the standard of the device and the error in the transient state where the primary current contains DC component.
【００４５】 また上記実施例のように、可撓性を有する接続導体３２及び３３を用いると、 直列接続時及び並列接続時に接続導体を共用することができるため経済的である 。Further, when the flexible connecting conductors 32 and 33 are used as in the above embodiment, the connecting conductors can be shared during series connection and parallel connection, which is economical.
【００４６】 なお本考案は、接続導体３２及び３３として可撓性を有するものを用いる場合 に限定されるものではなく、導電板の成形品から成る直列接続用導体を用いて、 第１の１次導体７の他端側の端子部Ｌ1 及び第２の１次導体８の一端側の端子部 Ｋ2 をそれぞれ第１及び第２の導体接続部１０３及び１０４に接続するようにす ることもできる。The present invention is not limited to the case where flexible ones are used as the connecting conductors 32 and 33, but the first connecting conductors 32 and 33 can be formed by using a series connecting conductor formed of a molded product of a conductive plate. The terminal portion L1 on the other end side of the next conductor 7 and the terminal portion K2 on one end side of the second primary conductor 8 may be connected to the first and second conductor connecting portions 103 and 104, respectively. .
【００４７】 上記の各実施例では、金属容器内及び該金属容器を支える碍管内に絶縁媒体と してＳＦ6 ガスを封入するとしたが、絶縁油を絶縁媒体として用いる場合にも同 様に構成できるのはもちろんである。In each of the above embodiments, SF 6 gas was sealed as an insulating medium in the metal container and the porcelain tube supporting the metal container. However, the same configuration is used when insulating oil is used as the insulating medium. Of course you can.
【００４８】 上記の各実施例では、２次ユニット６が４つのリング状鉄心６０１及び２次コ イルを備えているが、これらの個数は任意である。In each of the above embodiments, the secondary unit 6 includes four ring-shaped iron cores 601 and secondary coils, but the number of these is arbitrary.
【００４９】[0049]
以上のように、請求項１に記載した考案によれば、第１及び第２の１次導体を 直列に接続する際に直列接続用導体を金属容器の筒状部の外面に沿うように設け るとともに、該直列接続用導体を２次ユニットの鉄心から磁気遮蔽するための磁 気遮蔽板を設けたので、直列接続用導体を流れる帰路電流により生じる磁束が２ 次ユニットの鉄心側に流れるのを抑制して、該鉄心の直列接続用導体に近接する 部分の磁束密度の増大を抑制することができる。従って、直列接続用導体を流れ る帰路電流により鉄心の特定部分が磁気的に飽和するのを防ぐことができ、鉄心 の断面積を大きくしたり、均圧巻線を設けたりすることなく、過電流域での誤差 を規格範囲内に収めることができる。 As described above, according to the first aspect of the invention, the conductor for series connection is provided along the outer surface of the cylindrical portion of the metal container when the first and second primary conductors are connected in series. In addition, since the magnetic shield plate is provided to magnetically shield the series connection conductor from the iron core of the secondary unit, the magnetic flux generated by the return current flowing through the series connection conductor flows to the iron core side of the secondary unit. It is possible to suppress the increase in the magnetic flux density in the portion of the iron core that is close to the series connection conductor. Therefore, it is possible to prevent magnetic saturation of a specific part of the iron core due to the return current flowing through the series connection conductor, without increasing the cross-sectional area of the iron core and without providing a pressure equalizing winding. The error in the basin can be kept within the standard range.
【００５０】 また請求項２に記載した考案によれば、金属容器の蓋部を強磁性金属材料によ り形成し、第１及び第２の１次導体を直列に接続するための直列接続用導体を金 属容器の蓋部の外面に沿って配置して第１の１次導体の他端と第２の１次導体の 一端との間を接続するようにしたので、直列接続用導体を流れる帰路電流により 生じた磁束の殆どを強磁性金属材料からなる金属容器の蓋部に流すことができ、 ２次ユニットの鉄心の磁束密度の増大を抑制して該鉄心の部分飽和が生じるのを 防ぐことができる。従って、鉄心の断面積を大きくしたり、均圧巻線を設けたり することなく、過電流域での変流器の誤差を少なくすることができる。According to the second aspect of the invention, the lid part of the metal container is made of a ferromagnetic metal material, and the first and second primary conductors are connected in series for serial connection. The conductor is arranged along the outer surface of the lid of the metal container so that the other end of the first primary conductor and one end of the second primary conductor are connected to each other. Most of the magnetic flux generated by the flowing return current can flow to the lid of the metal container made of a ferromagnetic metal material, suppressing the increase in the magnetic flux density of the iron core of the secondary unit and causing partial saturation of the iron core. Can be prevented. Therefore, the error of the current transformer in the overcurrent region can be reduced without increasing the cross-sectional area of the iron core or providing the pressure equalizing winding.
【００５１】 更に、請求項３に記載した考案によれば、第１の１次導体の他端の近傍及び第 ２の１次導体の一端の近傍にそれぞれ位置させて金属容器の外面に第１及び第２ の導体接続部を設けて、第１の１次導体の他端及び第２の１次導体の一端をそれ ぞれ第１及び第２の接続導体を介して第１及び第２の導体接続部に接続すること により、直列接続時の帰路電流を金属容器を通して流すようにしたため、該帰路 電流が特定の部分に集中するのを防ぐことができる。従って、直列接続時の帰路 電流により生じる磁束を分散させて、２次ユニットの鉄心の部分飽和を防ぐこと ができ、過電流域での誤差を改善することができる。According to the third aspect of the invention, the first primary conductor is located near the other end and the second primary conductor is near one end, and the first primary conductor is provided on the outer surface of the metal container. And a second conductor connecting portion are provided, and the other end of the first primary conductor and one end of the second primary conductor are connected to the first and second connecting conductors via the first and second connecting conductors, respectively. Since the return current at the time of series connection is made to flow through the metal container by connecting to the conductor connecting portion, it is possible to prevent the return current from concentrating on a specific portion. Therefore, the magnetic flux generated by the return current at the time of series connection can be dispersed to prevent partial saturation of the iron core of the secondary unit, and the error in the overcurrent region can be improved.
【図１】請求項１に記載した考案の実施例において１次
側を直列接続した状態を示した正面縦断面図である。FIG. 1 is a front vertical sectional view showing a state in which primary sides are connected in series in an embodiment of the invention described in claim 1.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】図１の右側面図である。FIG. 3 is a right side view of FIG.
【図４】同実施例において１次側を並列接続した状態を
示した正面縦断面図である。FIG. 4 is a front vertical cross-sectional view showing a state in which the primary sides are connected in parallel in the example.
【図５】請求項２に記載した考案の実施例を示した正面
縦断面図である。FIG. 5 is a front vertical sectional view showing an embodiment of the invention described in claim 2.
【図６】図５の上面図である。FIG. 6 is a top view of FIG.
【図７】同実施例において１次側を並列接続した状態を
示した正面縦断面図である。FIG. 7 is a front vertical cross-sectional view showing a state in which the primary sides are connected in parallel in the example.
【図８】請求項３に記載した実施例において１次側を直
列接続した状態を示した正面縦断面図である。FIG. 8 is a front vertical cross-sectional view showing a state in which the primary sides are connected in series in the embodiment described in claim 3;
【図９】同実施例において１次側を並列接続した状態を
示した正面縦断面図である。FIG. 9 is a front vertical cross-sectional view showing a state in which the primary sides are connected in parallel in the example.
１ 金属容器 １０１ 筒状部 １０２ 蓋部 ２ 碍管 ４ 金属パイプ ６ ２次ユニット ６０１ リング状鉄心 ７ 第１の１次導体 ８ 第２の１次導体 ９ １次導体 １５，１５´ 直列接続用導体 １６，１６´ 接続金具 １７，１７´ 接続金具 ２５ 磁気遮蔽板 ２６ 接続導体 ２９ 接続導体 ３２ 第１の接続導体 ３３ 第２の接続導体 DESCRIPTION OF SYMBOLS 1 Metal container 101 Cylindrical part 102 Lid part 2 Insulator tube 4 Metal pipe 6 Secondary unit 601 Ring-shaped core 7 1st primary conductor 8 2nd primary conductor 9 Primary conductor 15,15 'Series connection conductor 16 , 16 'Connection metal fittings 17, 17' Connection metal fittings 25 Magnetic shielding plates 26 Connection conductors 29 Connection conductors 32 First connection conductors 33 Second connection conductors
Claims (4)
とを有している金属容器と、 リング状の鉄心と該鉄心に巻回された２次コイルとを有
していて、前記金属容器内に配置された環状の２次ユニ
ットと、 前記金属容器内で前記２次ユニットの内側を貫通し、前
記金属容器に対して絶縁された状態で設けられて、一端
及び他端が前記金属容器の筒状部から外部に導出された
第１の１次導体と、 前記第１の１次導体に対して絶縁された状態で設けられ
て前記第１の１次導体とともに前記２次ユニットの内側
を貫通し、一端及び他端がそれぞれ第１の１次導体の一
端側及び他端側で前記金属容器の筒状部から外部に導出
されて、一端が前記金属容器に電気的に接続された第２
の１次導体とを備え、 前記第１及び第２の１次導体を直列に接続した状態と、
並列に接続した状態とでそれぞれ異なる変流比を得る二
重比変流器において、 前記第１及び第２の１次導体を直列に接続するために、
前記金属容器の筒状部の外面に沿って配置されて前記第
１の１次導体の他端と第２の１次導体の一端との間を接
続する直列接続用導体が設けられ、 前記直列接続用導体を前記２次ユニットの鉄心から磁気
遮蔽するための磁気遮蔽板が設けられていることを特徴
とする二重比変流器。1. A metal container having a tubular portion and a lid portion closing one end of the tubular portion, a ring-shaped iron core, and a secondary coil wound around the iron core. An annular secondary unit disposed in the metal container, and a second unit that penetrates the inside of the secondary unit in the metal container and is insulated from the metal container. A first primary conductor whose end is led to the outside from the tubular portion of the metal container; and a first primary conductor, which is provided in an insulated state with respect to the first primary conductor, and together with the first primary conductor, Penetrating the inside of the secondary unit, one end and the other end are led out to the outside from the cylindrical portion of the metal container at one end side and the other end side of the first primary conductor, respectively, and one end is electrically connected to the metal container. Second connected electrically
And a state in which the first and second primary conductors are connected in series,
In a dual ratio current transformer that obtains different current ratios when connected in parallel, in order to connect the first and second primary conductors in series,
A serial connection conductor is provided that is arranged along the outer surface of the tubular portion of the metal container and connects the other end of the first primary conductor and one end of the second primary conductor, A double ratio current transformer, wherein a magnetic shield plate for magnetically shielding the connecting conductor from the iron core of the secondary unit is provided.
とを有している金属容器と、 リング状の鉄心と該鉄心に巻回された２次コイルとを有
していて、前記金属容器内に配置された環状の２次ユニ
ットと、 前記金属容器内で前記２次ユニットの内側を貫通し、前
記金属容器に対して絶縁された状態で設けられて、一端
及び他端が前記金属容器の筒状部から外部に導出された
第１の１次導体と、 前記第１の１次導体に対して絶縁された状態で設けられ
て前記第１の１次導体とともに前記２次ユニットの内側
を貫通し、一端及び他端がそれぞれ第１の１次導体の一
端側及び他端側で前記金属容器の筒状部から外部に導出
されて、一端が前記金属容器に電気的に接続された第２
の１次導体とを備え、 前記第１及び第２の１次導体を直列に接続した状態と、
並列に接続した状態とでそれぞれ異なる変流比を得る二
重比変流器において、 前記金属容器の蓋部は強磁性金属材料からなり、 前記第１及び第２の１次導体を直列に接続するために、
前記金属容器の蓋部の外面に沿って配置されて前記第１
の１次導体の他端と第２の１次導体の一端との間を接続
する直列接続用導体が設けられていることを特徴とする
二重比変流器。2. A metal container having a tubular portion and a lid portion closing one end of the tubular portion, a ring-shaped iron core, and a secondary coil wound around the iron core. An annular secondary unit disposed in the metal container, and a second unit that penetrates the inside of the secondary unit in the metal container and is insulated from the metal container. A first primary conductor whose end is led to the outside from the tubular portion of the metal container; and a first primary conductor, which is provided in an insulated state with respect to the first primary conductor, and together with the first primary conductor, Penetrating the inside of the secondary unit, one end and the other end are led out to the outside from the cylindrical portion of the metal container at one end side and the other end side of the first primary conductor, respectively, and one end is electrically connected to the metal container. Second connected electrically
And a state in which the first and second primary conductors are connected in series,
In a dual ratio current transformer that obtains different current ratios when connected in parallel, the lid of the metal container is made of a ferromagnetic metal material, and the first and second primary conductors are connected in series. In order to
The first container is disposed along the outer surface of the lid of the metal container.
A double-ratio current transformer, characterized in that a serial connection conductor is provided for connecting the other end of the primary conductor to the one end of the second primary conductor.
る金属容器と、 リング状の鉄心と該鉄心に巻回された２次コイルとを有
して、前記金属容器内に配置された環状の２次ユニット
と、 前記金属容器内で前記２次ユニットの内側を貫通し、前
記金属容器に対して絶縁された状態で設けられて、一端
及び他端が前記金属容器の外部に導出された第１の１次
導体と、 前記第１の１次導体に対して絶縁された状態で設けられ
て前記第１の１次導体とともに前記２次ユニットの内側
を貫通し、一端及び他端がそれぞれ第１の１次導体の一
端側及び他端側で前記金属容器の外部に導出されて、一
端が前記金属容器に電気的に接続された第２の１次導体
とを備え、 前記第１及び第２の１次導体を直列に接続した状態と、
並列に接続した状態とでそれぞれ異なる変流比を得る二
重比変流器において、 前記第１の１次導体の他端の近傍及び第２の１次導体の
一端の近傍にそれぞれ位置させて前記金属容器の外面に
第１及び第２の導体接続部が設けられ、 前記第１及び第２の１次導体を直列に接続する際には、
前記第１の１次導体の他端及び第２の１次導体の一端が
それぞれ第１及び第２の接続導体を介して前記第１及び
第２の導体接続部に接続されることを特徴とする二重比
変流器。3. A ring formed in the metal container, comprising a metal container made of a non-magnetic metal material having good conductivity, a ring-shaped iron core, and a secondary coil wound around the iron core. Of the secondary unit, and penetrates the inside of the secondary unit in the metal container, is provided in a state of being insulated from the metal container, and one end and the other end are led out to the outside of the metal container. A first primary conductor, the first primary conductor being insulated from the first primary conductor and penetrating the inside of the secondary unit together with the first primary conductor; A first primary conductor that is led out to the outside of the metal container at one end side and the other end side of the first primary conductor and has one end electrically connected to the metal container; A state in which the second primary conductor is connected in series,
In a dual ratio current transformer that obtains different current ratios when connected in parallel, the current transformers are respectively located near the other end of the first primary conductor and near one end of the second primary conductor. First and second conductor connecting portions are provided on the outer surface of the metal container, and when connecting the first and second primary conductors in series,
The other end of the first primary conductor and one end of the second primary conductor are connected to the first and second conductor connecting portions via first and second connecting conductors, respectively. Double ratio current transformer.
て、その一端が前記金属容器に電気的に接続された状態
で支持されるとともに他端が絶縁物を介して前記金属容
器に支持され、 前記第１の１次導体は前記第２の１次導体の内側に同心
的に配置されて、該第２の１次導体に絶縁物を介して支
持されていることを特徴とする請求項１、２または３の
いずれかに記載の二重比変流器。4. The second primary conductor is formed in a tubular shape, one end of which is supported while being electrically connected to the metal container, and the other end of which is connected to the metal container via an insulator. Is supported, the first primary conductor is concentrically arranged inside the second primary conductor, and is supported by the second primary conductor via an insulator. The double ratio current transformer according to claim 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2479793U JPH0682840U (en) | 1993-05-13 | 1993-05-13 | Double ratio current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2479793U JPH0682840U (en) | 1993-05-13 | 1993-05-13 | Double ratio current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0682840U true JPH0682840U (en) | 1994-11-25 |
Family
ID=12148189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2479793U Withdrawn JPH0682840U (en) | 1993-05-13 | 1993-05-13 | Double ratio current transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0682840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010106916A1 (en) * | 2009-03-16 | 2010-09-23 | 株式会社日本Ａｅパワーシステムズ | Integral three-phase gas insulated switchgear |
-
1993
- 1993-05-13 JP JP2479793U patent/JPH0682840U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010106916A1 (en) * | 2009-03-16 | 2010-09-23 | 株式会社日本Ａｅパワーシステムズ | Integral three-phase gas insulated switchgear |
| JP2010220328A (en) * | 2009-03-16 | 2010-09-30 | Japan Ae Power Systems Corp | Three-phase batch type gas-insulated switchgear |
| CN102341981A (en) * | 2009-03-16 | 2012-02-01 | 日本Ae帕瓦株式会社 | Three-phase common tank type gas insulated switchgear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10741319B2 (en) | Three-phase reactor | |
| JP2008227526A (en) | Toroidal inductive device and method for making the same | |
| JP2008182053A (en) | Resting induction electric appliance | |
| JPH0114685B2 (en) | ||
| JPH0682840U (en) | Double ratio current transformer | |
| KR102319716B1 (en) | A pole transformer | |
| CA1334855C (en) | Electrical apparatus with an in-tank electromagnetic shield | |
| JP3646595B2 (en) | Static induction machine | |
| CN213660189U (en) | Novel dry-type test transformer | |
| US4030057A (en) | Inductive voltage transformer | |
| JP2590674Y2 (en) | Double ratio current transformer | |
| CN212625107U (en) | Gas-insulated single-stage iron-core reactor | |
| JP2001230136A (en) | Instrument transformer | |
| CN218826558U (en) | Oil-immersed iron core structure adopting U-shaped iron yoke structure and reactor | |
| JPH0534090Y2 (en) | ||
| KR101549930B1 (en) | Gas Insulated Switchgear Bushing-type Current Transformer | |
| JPS5824418Y2 (en) | Transformer winding lead structure | |
| JPS6111947Y2 (en) | ||
| JPH09205024A (en) | Electromagnetic induction machine | |
| JPS62181Y2 (en) | ||
| JPH0722257A (en) | Stationary induction machine | |
| JP2023037465A (en) | Current transformer | |
| JPH0325384Y2 (en) | ||
| JPH0236254Y2 (en) | ||
| CN112103051A (en) | Gas-insulated single-stage iron-core reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19971106 |