JPH09283357A - Current transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain sufficient characteristics as a zero-phase current transformer and simply produce a core by passing two-phase prim. conductors through an annular core of this transformer via bends. SOLUTION: An annular core 37 of a zero-phase current transformer is stacked parallel on annular cores 25 of two current transformers 26 laid on the same surface. One-phase prim. conductor 29 pierces the core 37 of the transformer 36 only. Twophase prim. conductors 29 pierce the cores 25 of both transformers 26 and also the core 37 of the zero-phase transformer 36 via bends 38. The cores 25 of the transformers 26 and core 37 of the transformer 36 are covered en bloc with a mold 39. Thus it is possible to obtain characteristics enough as a zero-phase current transformer and easily produce the core.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、変流器及び零相変
流器がエポキシ等のモールドにより一体化されてスイッ
チギヤに収納される変流装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current transformer in which a current transformer and a zero-phase current transformer are integrated by a mold such as epoxy resin and housed in a switch gear.

【０００２】[0002]

【従来の技術】従来の変流装置につき、スイッチギヤの
概略図を示した図４、図４の主回路図の図５を参照して
説明する。それらの図において、１はスイッチギヤ本
体、２は本体１の前面の上部，下部の開口を閉塞した
扉、３は本体１内に立設された立設体、４は立設体３の
上部，下部に設けられた収納台、５は両収納台４の後方
の上部及び下部に設けられた固定接触子、６は両収納台
４にそれぞれ出入自在に収納されたガス遮断器、７はガ
ス遮断器６の後部の上側及び下側に設けられた可動接触
子であり、両固定接触子５に着脱自在に接触している。2. Description of the Related Art A conventional current transformer will be described with reference to FIGS. 4 and 5 showing a schematic diagram of a switchgear and a main circuit diagram of FIG. In these drawings, 1 is a switchgear main body, 2 is a door whose upper and lower openings are closed on the front surface of the main body 1, 3 is a standing body standing inside the main body 1, and 4 is an upper portion of the standing body 3. , A storage base provided in the lower part, 5 fixed contacts provided in the upper and lower rear parts of both storage bases 4, a gas circuit breaker housed in both storage bases 4 so as to be able to move in and out, and 7 a gas The movable contactors are provided on the upper side and the lower side of the rear part of the circuit breaker 6, and are in detachable contact with both the fixed contactors 5.

【０００３】８は両収納台４間に設けられた母線であ
り、母線８に、一方の固定接触子５及び可動接触子７を
介してガス遮断器６の一端が接続されている。９は両ガ
ス遮断器６の後方に設けられたブッシング、１０はブッ
シング９内に埋設された変流器、１１は変流器１０の円
環状のコア１２を貫通した導体であり、一端が他方の固
定接触子５及び可動接触子７を介してガス遮断器６の他
端に接続されている。１３は両導体１１の他端に接続さ
れたケーブル、１４は本体１の後側下部に設けられた零
相変流器であり、零相変流器１４の円環状のコア１５を
各ケーブル１３が貫通している。Reference numeral 8 is a bus bar provided between the two storage stands 4, and one end of a gas circuit breaker 6 is connected to the bus bar 8 via one fixed contact 5 and one movable contact 7. 9 is a bushing provided behind both gas circuit breakers 6, 10 is a current transformer embedded in the bushing 9, 11 is a conductor penetrating an annular core 12 of the current transformer 10, and one end is the other. It is connected to the other end of the gas circuit breaker 6 via the fixed contact 5 and the movable contact 7. Reference numeral 13 is a cable connected to the other ends of both conductors 11, 14 is a zero-phase current transformer provided in the lower rear portion of the main body 1, and the annular core 15 of the zero-phase current transformer 14 is connected to each cable 13 Has penetrated.

【０００４】つぎに、他の従来の変流装置につき、スイ
ッチギヤの概略図及び主回路図の図６Ａ，Ｂ、図６Ａの
一部の切断正面図，一部切断平面図，左側面図，右側面
図，一部の斜視図を示した図７Ａ，Ｂ，Ｃ，Ｄ，Ｅを参
照して説明する。Next, regarding another conventional current transformer, a schematic view of the switchgear and FIGS. 6A and 6B of the main circuit diagram, a partially cut front view, a partially cut plan view, a left side view, The description will be given with reference to FIGS. 7A, 7B, 7C, 7D, 7E, 7E, 7A, 7B, 7C, 7D, 7E, 7A, 7B, 7C, 7D, 7E, 7A, 7 </ b> B, 7 </ b> A, 7 </ b> B, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, 7 </ b> A, and 7 </ b> E showing a right side view and a part of a perspective view.

【０００５】それらの図において、１６はスイッチギヤ
本体、１７は本体１６の前面の上部，中央部，下部の開
口を閉塞した扉、１８は本体１６の後面の開口を閉塞し
た扉、１９は本体１６に立設された立設体、２０は中央
部の扉１７に設けられた複数個の継電器、２１は立設体
１９の上部，下部に設けられた収納台、２２は両収納台
２１にそれぞれ収納されたガス遮断器、２３は両収納台
２１間に設けられた母線であり、母線２３に両ガス遮断
器２２のそれぞれの一端が接続されている。In these figures, 16 is a switchgear main body, 17 is a door whose upper, central, and lower openings on the front surface of the main body 16 are closed, 18 is a door whose rear opening is closed, and 19 is a main body. 16 standing body, 20 a plurality of relays provided on the central door 17, 21 is a storage stand provided on the upper and lower parts of the standing body 19, 22 is both storage stands 21 The stored gas circuit breakers, 23 are busbars provided between both storage bases 21, and one end of each of the gas circuit breakers 22 is connected to the busbar 23.

【０００６】２４は両ガス遮断器２２の後部にそれぞれ
設けられた変流装置、２５は左側の同一面に並設された
２個の変流器２６の円環状のコア、２７は両コア２５に
平行に重合された図７Ｅに示す零相変流器２８の楕円環
状のコア、２９は３相分の１次導体であり、一端がガス
遮断器２２の他端に接続され、２相の１次導体２９がそ
れぞれ両変流器２６のコア２５を貫通し、３相分の１次
導体２９が零相変流器２８のコア２７を貫通し、ケーブ
ル３０に接続されている。Reference numeral 24 is a current transformer provided at the rear of each gas circuit breaker 22, 25 is an annular core of two current transformers 26 juxtaposed on the same plane on the left side, and 27 is both cores 25. 7E of the zero-phase current transformer 28 shown in FIG. 7E, which is superposed in parallel with the core, 29 is a primary conductor for three phases, one end of which is connected to the other end of the gas circuit breaker 22 and which has two phases. The primary conductors 29 pass through the cores 25 of both current transformers 26, and the primary conductors 29 for three phases pass through the cores 27 of the zero-phase current transformers 28 and are connected to the cable 30.

【０００７】３１は両変流器２６のコア２５及び零相変
流器２８のコア２７を一体に被覆したエポキシ等のモー
ルド、３２はモールド３１の右側面に一体に突設され，
それぞれ各１次導体２９の他端を覆った被覆体、３３は
モールド３１の右側面の上部に導出された複数個の２次
端子である。31 is a mold made of epoxy or the like integrally covering the core 25 of both current transformers 26 and the core 27 of the zero-phase current transformer 28, and 32 is integrally provided on the right side surface of the mold 31 so as to project.
Each of the primary conductors 29 covers the other end of the primary conductor 29, and 33 is a plurality of secondary terminals led to the upper part of the right side surface of the mold 31.

【０００８】３４は上部のガス遮断器２２の後方に設け
られた断路器であり、両端部が１次導体２９の他端に接
続されている。３５は断路器３４の後方に設けられた断
路器３４の操作器である。Reference numeral 34 is a disconnecting switch provided behind the upper gas circuit breaker 22, and both ends thereof are connected to the other end of the primary conductor 29. Reference numeral 35 is an operation device of the disconnector 34 provided behind the disconnector 34.

【０００９】[0009]

【発明が解決しようとする課題】従来の前記図７の変流
装置２４の場合、図７Ｅに示すように、零相変流器２８
のコア２７の形状が楕円環状であるため、零相変流器と
しての充分な特性を得ることが困難であるとともに、製
作も困難である。In the case of the conventional current transformer 24 of FIG. 7, as shown in FIG. 7E, the zero-phase current transformer 28 is used.
Since the core 27 has an elliptic ring shape, it is difficult to obtain sufficient characteristics as a zero-phase current transformer, and also difficult to manufacture.

【００１０】しかも、零相変流器２８の精度をよくする
には、コア２７を大きくしたり、材料特性のよい高価な
コアを使用したりする必要がある。Moreover, in order to improve the accuracy of the zero-phase current transformer 28, it is necessary to enlarge the core 27 or use an expensive core having good material characteristics.

【００１１】本発明は、前記の点に留意し、楕円環状の
コアを用いることなく、零相変流器としての充分な特性
が得られるとともに、コアが簡単に製作でき、安価で、
かつ、小形化が実現できる変流装置を提供することを目
的とする。In consideration of the above points, the present invention can obtain sufficient characteristics as a zero-phase current transformer without using an elliptic ring-shaped core, and the core can be easily manufactured at a low cost.
Moreover, it aims at providing the current transformer which can implement | achieve miniaturization.

【００１２】[0012]

【課題を解決するための手段】前記課題を解決するため
に、本発明の変流装置は、同一面に並設された２個の変
流器の円環状のコアと、両コアに平行に重合された零相
変流器の円環状のコアと、零相変流器のコアのみを貫通
した１相の１次導体と、両変流器のコアをそれぞれ貫通
し，折曲部を経て零相変流器のコアを貫通した２相の１
次導体と、両変流器のコア及び零相変流器のコアを一体
に被覆したモールドとを備えたものである。In order to solve the above-mentioned problems, the current transformer of the present invention has an annular core of two current transformers arranged in parallel on the same plane, and parallel to both cores. Toroidal core of polymerized zero-phase current transformer, 1-phase primary conductor that penetrates only the core of zero-phase current transformer, and cores of both current transformers, and through the bent part Two-phase one through the core of zero-phase current transformer
It is provided with a secondary conductor and a mold in which the cores of both current transformers and the core of the zero-phase current transformer are integrally covered.

【００１３】従って、零相変流器のコアが円環状であ
り、その円環状のコアを、２相の１次導体が折曲部を経
て貫通しているため、零相変流器としての充分な特性が
得られるとともに、高価なコアが不要になり、コアの製
作も容易になり、安価で、かつ、小形化が実現される。Therefore, the core of the zero-phase current transformer has an annular shape, and the two-phase primary conductors penetrate through the annular core through the bent portions, so that the zero-phase current transformer serves as a zero-phase current transformer. Sufficient characteristics can be obtained, an expensive core is not required, the core can be easily manufactured, and the cost can be reduced and the size can be reduced.

【００１４】[0014]

【発明の実施の形態】実施の１形態につき、一部切断正
面図を示した図１、図１の平面図を示した図２、左側面
図及び右側面図を示した図３Ａ，Ｂを参照して説明す
る。それらの図において、図７と同一符号は同一もしく
は相当するものを示し、異なる点はつぎのとおりであ
る。1 shows a partially cut front view, FIG. 2 shows a plan view of FIG. 1, and FIGS. 3A and 3B show a left side view and a right side view according to an embodiment of the present invention. It will be described with reference to FIG. In these figures, the same symbols as those in FIG. 7 indicate the same or corresponding ones, and the different points are as follows.

【００１５】同一面に並設された２個の変流器２６の円
環状のコア２５の右側に、平行に零相変流器３６の円環
状のコア３７が重合され、中央部の１相の１次導体２９
の他端が零相変流器３６のコア３７のみを貫通し、両側
の２相の１次導体２９の一端が両変流器２６のコア２５
をそれぞれ貫通し、内側に折曲された折曲部３８を経て
２相の１次導体２９の他端が零相変流器３６のコア３７
を貫通し、エポキシ等のモールド３９により両変流器２
６のコア２５及び零相変流器３６のコア３７を一体に被
覆し、モールド３９の左側前面に２次端子３３が導出さ
れている。On the right side of the annular core 25 of the two current transformers 26 arranged in parallel on the same plane, the annular core 37 of the zero-phase current transformer 36 is superposed in parallel, and one phase in the central portion is formed. Primary conductor 29
Of the two-phase primary conductors 29 on both sides penetrates only the core 37 of the zero-phase current transformer 36.
And the other end of the two-phase primary conductor 29 through the bent portion 38 that is bent inward.
Both current transformers 2 through the mold 39 such as epoxy
The core 25 of No. 6 and the core 37 of the zero-phase current transformer 36 are integrally covered, and the secondary terminal 33 is led out to the left front surface of the mold 39.

【００１６】[0016]

【発明の効果】本発明は、以上説明したように構成され
ているため、つぎに記載する効果を奏する。本発明の変
流装置は、同一面に並設された２個の変流器２６の円環
状のコア２５に平行に、零相変流器３６の円環状のコア
３７を重合し、１相の１次導体２９が零相変流器３６の
コア３７のみを貫通し、２相の１次導体２９が両変流器
２６のコア２５をそれぞれ貫通し、折曲部３８を経て零
相変流器３６のコア３７を貫通し、両変流器２６のコア
２５及び零相変流器３６のコア３７をモールド３９によ
り一体に被覆したため、零相変流器３６のコア３７が円
環状であり、その円環状のコア３７を、２相の１次導体
２９が折曲部３８を経て貫通することにより、零相変流
器としての充分な特性を得ることができるとともに、高
価なコアを不要にし、コアの製作を容易にし、安価で、
かつ、小形化を実現することができる。Since the present invention is constructed as described above, it has the following effects. The current transformer of the present invention superimposes the annular core 37 of the zero-phase current transformer 36 in parallel with the annular cores 25 of the two current transformers 26 arranged in parallel on the same plane to form one phase. Primary conductor 29 penetrates only the core 37 of the zero-phase current transformer 36, the two-phase primary conductor 29 penetrates the cores 25 of both current transformers 26, and the zero-phase transformer passes through the bent portion 38. Since the core 37 of the current transformer 36 is penetrated and the core 25 of both current transformers 26 and the core 37 of the zero-phase current transformer 36 are integrally covered with the mold 39, the core 37 of the zero-phase current transformer 36 has an annular shape. By passing the two-phase primary conductor 29 through the bent portion 38 through the annular core 37, sufficient characteristics as a zero-phase current transformer can be obtained and an expensive core can be obtained. Unnecessary, easy to make core, cheap,
Moreover, miniaturization can be realized.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施の１形態の一部切断正面図であ
る。FIG. 1 is a partially cut front view of an embodiment of the present invention.

【図２】図１の平面図である。FIG. 2 is a plan view of FIG.

【図３】Ａは図１の左側面図、Ｂは右側面図である。FIG. 3A is a left side view of FIG. 1, and B is a right side view.

【図４】従来例のスイッチギヤの概略図である。FIG. 4 is a schematic view of a conventional switchgear.

【図５】図４の主回路図である。FIG. 5 is a main circuit diagram of FIG.

【図６】Ａは他の従来例のスイッチギヤの概略図、Ｂは
Ａの主回路図である。6A is a schematic view of another conventional switchgear, and B is a main circuit diagram of A. FIG.

【図７】Ａは図６Ａの一部の切断正面図、Ｂは一部切断
平面図、Ｃは左側面図、Ｄは右側面図、ＥはＡの一部の
斜視図である。7A is a partially cutaway front view of FIG. 6A, B is a partially cutaway plan view, C is a left side view, D is a right side view, and E is a partially perspective view of FIG.

【符号の説明】[Explanation of symbols]

２５ コア ２６ 変流器 ２９ １次導体 ３６ 零相変流器 ３７ コア ３８ 折曲部 ３９ モールド 25 core 26 current transformer 29 primary conductor 36 zero-phase current transformer 37 core 38 bent portion 39 mold

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 同一面に並設された２個の変流器の円環
状のコアと、 この両コアに平行に重合された零相変流器の円環状のコ
アと、 前記零相変流器のコアのみを貫通した１相の１次導体
と、 前記両変流器のコアをそれぞれ貫通し，折曲部を経て前
記零相変流器のコアを貫通した２相の１次導体と、 前記両変流器のコア及び前記零相変流器のコアを一体に
被覆したモールドとを備えたことを特徴とする変流装
置。1. An annular core of two current transformers arranged in parallel on the same plane, an annular core of a zero-phase current transformer superposed in parallel with both cores, and the zero-phase transformer. 1-phase primary conductor penetrating only the core of the current transformer, and 2-phase primary conductor penetrating the cores of both the current transformers and passing through the core of the zero-phase current transformer through the bent portion. And a mold in which the cores of the both current transformers and the core of the zero-phase current transformer are integrally covered.