JP3582906B2 - Stationary guidance equipment - Google Patents

Stationary guidance equipment Download PDF

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Publication number
JP3582906B2
JP3582906B2 JP22191195A JP22191195A JP3582906B2 JP 3582906 B2 JP3582906 B2 JP 3582906B2 JP 22191195 A JP22191195 A JP 22191195A JP 22191195 A JP22191195 A JP 22191195A JP 3582906 B2 JP3582906 B2 JP 3582906B2
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Japan
Prior art keywords
tap
container
winding
cover
switching
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Expired - Fee Related
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JP22191195A
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Japanese (ja)
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JPH0963867A (en
Inventor
佳之 近藤
広幸 田中
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Toshiba Corp
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Toshiba Corp
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Priority to JP22191195A priority Critical patent/JP3582906B2/en
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Description

【0001】
【発明の属する技術分野】
本発明はタップ切換機構の取り付け構造を改良した静止誘導機器に関する。
【0002】
【発明が解決しようとする課題】
静止誘導機器、例えば容器内に冷媒が封入された自冷式の変圧器においては、冷媒、例えばSFガスの温度が上下で異なるため、構造上、高温に耐えられないタップ切換機構はSFガスの温度が低い下部近傍の容器側壁に取付けられている。
【0003】
この種の変圧器の従来例としては、例えば図3に示されるものがある。このものは、容器1の側壁1aに取付けられたタップ切換機構2の上方に位置して開口部3が設けられている。そして、この開口部3から手を入れてタップ切換機構2のタップ切換器2aと、巻線4のタップとの接続作業を行い、接続作業が終了すると、カバー5で開口部3を塞ぐようになっている。
【0004】
また、他の従来例として図4に示されるものもある。このものは、容器6が下部容器7と上部容器8とに分割される構成で、下部容器7の側壁7aにタップ切換機構9が取付けられている。そして、タップ切換器9aと巻線10のタップとの接続作業を行った後、下部容器7に上部容器8を被せ、両容器7,8の接触面を溶接等で固定するようになっている。
【0005】
しかしながら、上記した従来の変圧器においては、いずれの場合もタップ切換器2a,9aと巻線4,10のタップとの接続作業を行う際に、タップ切換器2a,9aと巻線4、10との間に所定の間隔をとって作業スペースを確保する必要があり、また、タップ切換機構2,9は、構造上、タップ切換器2a,9aと切換操作部2b,9bとの間にある間隔を設ける必要があるため、その結果、容器1、6側面と巻線4、10との距離L1、L2が大きくなって容器1、6の寸法が大きくなるという欠点があった。
【0006】
さらに、上記した従来の変圧器のうち後者のものでは、タップ切換器9aと巻線10のタップとの接続作業を行った後、下部容器7と上部容器8とを溶接等で固定する構成であるため、固定した後はタップ切換機構9の動作点検やタップ切換器9aとタップとの接続具合等の点検を容易に行うことができないという欠点があった。
【0007】
本発明は上記事情に鑑みてなされたもので、その目的は、全体の小形化を図り得ると共にタップ切換器と巻線のタップとの接続を容易に行うことができ、且つ組み立て後の点検が容易な静止誘導機器を提供するにある。
【0008】
【課題を解決するための手段】
本発明の静止誘導機器は、容器内に収容された巻線と、この巻線に設けられたタップを切り換えるためのタップ切換機構とを具備するものであって、前記タップ切換機構はタップ切換器と、このタップ切換器の切換操作部とから成り、前記タップ切換器は、前記容器の側壁部に形成された開口部に設けられた着脱可能なカバーの内側に取り付けられ、前記切換操作部は前記カバーの外側に取付けられていることを特徴とする(請求項1)。
【0009】
このとき、巻線の近傍に絶縁部材を設け、カバーを開口部に取付けたとき、巻線のタップとタップ切換器とを接続する接続リード線の途中部分が、前記絶縁部材により巻線側と絶縁されるようにすることが望ましい(請求項2)。
また、容器内に冷媒を充填し、開口部を前記容器の下部近傍に設けるようにすると良い(請求項3)。
【0010】
【発明の実施の形態】
本発明の一実施例を静止誘導機器である変圧器に適用した場合について図1及び図2に基づいて説明する。図1は変圧器の全体構成を示しており、立方体をなす容器11の内部に変圧器本体12が収容されている。変圧器本体12は、鉄心13に巻線14を装着して構成されており、図示しない脚部により容器11底部に固定されている。
【0011】
容器11の側壁部11aには、前記巻線14より下方に位置する容器11の下部近傍に開口部15が形成されており、この開口部15には着脱可能なカバー16が設けられている。カバー16には、巻線14に設けられた複数本のタップ(図示せず)を接続リード線17を介して切換えることにより変圧比を変えるタップ切換機構18が設けられている。以下、タップ切換機構18について詳述する。
【0012】
タップ切換機構18は、カバー16の外面側に取付けられた切換操作部19と、カバー16の内面側に支持パイプ20を介して取付けられたタップ切換器21とから構成されている。タップ切換器21は支持パイプ20内に挿通されたシャフト22にて前記切換操作部19と連結されており、詳しくは図示しないが、複数本の接続リード線17が接続される固定接点部と、これに接して回転切替えをする可動接点部とを有する。そして、切換操作部19の操作レバー19aを回転操作することにより、シャフト22を介してタップ切換器21の可動接点部が回転され、タップ切換えが為されるようになっている。
【0013】
また、前記接続リード線17の長さは、カバー16を取外してタップ切換器21を容器11外に取り出した状態で(図1に示す状態)、タップ切換器21と接続リード線17の端部との接続が可能な長さに設定されている。そして、容器11内には、巻線14の下方に位置してL字形状の絶縁部材23が設けられており、各面がそれぞれ鉄心13と容器11の底面と対向するようになっている。そして、図2に示すように、カバー16を開口部15に取付けたとき、接続リード線17及びタップ切換器21が絶縁部材23に収容されるようになっている。
【0014】
尚、容器11内には、変圧器本体12を冷却するための冷媒、例えばSFガス24が封入されている。このSFガス24は、発生熱源たる鉄心13及び巻線14付近で熱を奪うことによる温度上昇に伴って上に流れ、放熱されることによって下降する自然対流を繰り返すことにより鉄心13及び巻線14を冷却するものである。
【0015】
而して、上記した構成の本実施例によれば、着脱可能なカバー16にタップ切換機構18が設けられ、カバー16を取外してタップ切換器21を容器11外に取出した状態でタップ切換器21に接続リード線17を接続することができるので、従来構成(図3及び図4参照)のように容器内に手を入れて接続する場合に比して作業が容易になる。
【0016】
また、接続作業を容器11外で行うため、タップ切換器21と巻線14との間に作業スペースを確保する必要がないので、容器11側面と巻線14との距離を短くすることができる。しかも、巻線14の下方に位置して絶縁部材23が設けられ、カバー16を開口部15に取付けたときにタップ切換器21及び接続リード線17は前記絶縁部材23に収容されるので、接続作業を容器11外で行うために必要な長さを有する接続リード線17がたるんで巻線14側の鉄心13や容器11と接触することがなく絶縁される。
【0017】
また、タップ切換機構18は構造上、高温に耐えられないものであるが、温度の低い状態にあるSFガス24が存在する容器11の下底部近傍に位置して設けられているため、高温雰囲気下におかれることがない。
【0018】
さらに、カバー16は開口部15に着脱可能に取り付けられているため、変圧器を組み立てた後も、タップ切換機構18の点検あるいはタップ切換器21と接続リード線17との接続の点検等を容易に実施することができる。
なお、本発明は変圧器に限られず、その他、リアクトルなどの静止誘導機器に適用しても良い。
【0019】
【発明の効果】
以上の説明から明らかなように、本発明の静止誘導機器によれば、タップ切換器とタップとの接続を容器外にて行うことができるので作業性が良く、また、そのために、容器内に接続作業を行うためのスペースを確保しなくても良いので機器全体の小形化を図ることができる(請求項1)。
【0020】
また、タップ切換機構を容器の下底部近傍に設けることにより、高温雰囲気下におかれることがない(請求項3)。
【図面の簡単な説明】
【図1】本発明の一実施例の変圧器を示し、カバーを取外した状態の縦断側面図
【図2】タップ切換機構付近の拡大図
【図3】第1の従来例を示す図1相当図
【図4】第2の従来例を示す図1相当図
【符号の説明】
11は容器、14は巻線、15は開口部、16はカバー、17は接続リード線、18はタップ切換機構、19は切換操作部、21はタップ切換器、23は絶縁部材、24はSFガス(冷媒)を示す。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stationary induction device with an improved mounting structure for a tap switching mechanism.
[0002]
[Problems to be solved by the invention]
Stationary induction apparatus in the transformer self cooling the refrigerant is sealed in, for example, the container, the refrigerant, for example, the temperature of the SF 6 gas is different in upper and lower, structural, tap-changing mechanism can not tolerate high temperatures SF 6 It is mounted on the container side wall near the lower part where the gas temperature is low.
[0003]
FIG. 3 shows a conventional example of this type of transformer. This device is provided with an opening 3 located above a tap switching mechanism 2 attached to a side wall 1a of the container 1. Then, a hand is inserted through the opening 3 to perform a connection operation between the tap changer 2a of the tap switching mechanism 2 and the tap of the winding 4, and when the connection operation is completed, the cover 5 is closed with the cover 5. Has become.
[0004]
FIG. 4 shows another conventional example. This device has a configuration in which a container 6 is divided into a lower container 7 and an upper container 8, and a tap switching mechanism 9 is attached to a side wall 7 a of the lower container 7. After the connection operation between the tap changer 9a and the tap of the winding 10 is performed, the upper container 8 is put on the lower container 7, and the contact surfaces of the two containers 7, 8 are fixed by welding or the like. .
[0005]
However, in the above-described conventional transformer, in any case, when performing the connection work between the tap changers 2a and 9a and the taps of the windings 4 and 10, the tap changers 2a and 9a and the windings 4 and 10 are used. It is necessary to secure a working space with a predetermined interval between the tap switching mechanisms 2 and 9, and the tap switching mechanisms 2 and 9 are structurally located between the tap switches 2a and 9a and the switching operation units 2b and 9b. Since there is a need to provide an interval, as a result, the distances L1 and L2 between the side surfaces of the containers 1 and 6 and the windings 4 and 10 are increased, so that the dimensions of the containers 1 and 6 are increased.
[0006]
Furthermore, the latter one of the above-mentioned conventional transformers has a configuration in which the connection between the tap changer 9a and the tap of the winding 10 is performed, and then the lower container 7 and the upper container 8 are fixed by welding or the like. For this reason, there is a disadvantage that after the fixing, the operation check of the tap switching mechanism 9 and the inspection of the connection state between the tap changer 9a and the tap cannot be easily performed.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to reduce the size of the entirety, to easily connect a tap changer to a winding tap, and to perform inspection after assembly. It is to provide an easy stationary guidance device.
[0008]
[Means for Solving the Problems]
The stationary induction device of the present invention includes a winding housed in a container, and a tap switching mechanism for switching a tap provided on the winding, wherein the tap switching mechanism is a tap switching device. And a switching operation portion of the tap switching device, wherein the tap switching device is mounted inside a detachable cover provided in an opening formed in a side wall portion of the container, and the switching operation portion is It is attached to the outside of the cover (claim 1).
[0009]
At this time, an insulating member is provided in the vicinity of the winding, and when the cover is attached to the opening, an intermediate portion of the connection lead wire connecting the tap of the winding and the tap changer is connected to the winding side by the insulating member. It is desirable to be insulated (claim 2).
Further, it is preferable that the container is filled with a refrigerant, and the opening is provided near the lower portion of the container.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
A case where an embodiment of the present invention is applied to a transformer which is a stationary induction device will be described with reference to FIGS. FIG. 1 shows the overall configuration of a transformer, in which a transformer body 12 is housed inside a cubic container 11. The transformer main body 12 is configured by attaching a winding 14 to an iron core 13 and is fixed to the bottom of the container 11 by legs (not shown).
[0011]
An opening 15 is formed in the side wall 11 a of the container 11 near the lower portion of the container 11 located below the winding 14, and the opening 15 is provided with a removable cover 16. The cover 16 is provided with a tap switching mechanism 18 that changes a transformation ratio by switching a plurality of taps (not shown) provided on the winding 14 via a connection lead wire 17. Hereinafter, the tap switching mechanism 18 will be described in detail.
[0012]
The tap switching mechanism 18 includes a switching operation unit 19 attached to the outer surface of the cover 16 and a tap switch 21 attached to the inner surface of the cover 16 via a support pipe 20. The tap changer 21 is connected to the switching operation unit 19 by a shaft 22 inserted into the support pipe 20. Although not shown in detail, a fixed contact portion to which a plurality of connection lead wires 17 are connected, And a movable contact portion for switching rotation in contact with the movable contact portion. By rotating the operation lever 19a of the switching operation section 19, the movable contact portion of the tap changer 21 is rotated via the shaft 22, and the tap is changed.
[0013]
Further, the length of the connection lead wire 17 is determined in such a manner that the cover 16 is removed and the tap changer 21 is taken out of the container 11 (the state shown in FIG. 1). Is set to a length that allows connection with Further, an L-shaped insulating member 23 is provided in the container 11 below the winding 14, and each surface is opposed to the iron core 13 and the bottom surface of the container 11, respectively. As shown in FIG. 2, when the cover 16 is attached to the opening 15, the connection lead 17 and the tap changer 21 are accommodated in the insulating member 23.
[0014]
In the container 11, a refrigerant for cooling the transformer main body 12, for example, SF 6 gas 24 is sealed. The SF 6 gas 24 flows upward with a rise in temperature due to deprivation of heat in the vicinity of the core 13 and the winding 14 as a generated heat source, and repeats natural convection, which is lowered by being radiated, so that the core 13 and the winding 14 is to be cooled.
[0015]
Thus, according to the present embodiment having the above-described configuration, the tap switching mechanism 18 is provided on the detachable cover 16, and the tap switching mechanism 21 is removed from the cover 16 and the tap switching device 21 is taken out of the container 11. Since the connection lead wire 17 can be connected to the connection 21, the work becomes easier as compared with the case where the connection is made by putting a hand in the container as in the conventional configuration (see FIGS. 3 and 4).
[0016]
Further, since the connection operation is performed outside the container 11, there is no need to secure a working space between the tap changer 21 and the winding 14, so that the distance between the side surface of the container 11 and the winding 14 can be shortened. . In addition, an insulating member 23 is provided below the winding 14, and when the cover 16 is attached to the opening 15, the tap changer 21 and the connection lead 17 are accommodated in the insulating member 23. The connection lead wire 17 having a length necessary for performing the operation outside the container 11 is slack and is insulated without contact with the iron core 13 on the winding 14 side and the container 11.
[0017]
Although the tap switching mechanism 18 is structurally incapable of withstanding high temperatures, it is located near the lower bottom of the container 11 in which the SF 6 gas 24 in a low temperature state exists. There is no atmosphere.
[0018]
Further, since the cover 16 is detachably attached to the opening portion 15, even after assembling the transformer, the inspection of the tap switching mechanism 18 or the inspection of the connection between the tap switching device 21 and the connection lead 17 can be easily performed. Can be implemented.
The present invention is not limited to a transformer, and may be applied to a stationary induction device such as a reactor.
[0019]
【The invention's effect】
As is clear from the above description, according to the stationary induction device of the present invention, the connection between the tap changer and the tap can be performed outside the container, so that the workability is good, and for that purpose, Since it is not necessary to secure a space for performing the connection work, it is possible to reduce the size of the entire device (claim 1).
[0020]
Further, since the tap switching mechanism is provided near the lower bottom of the container, the tap switching mechanism is not placed in a high-temperature atmosphere.
[Brief description of the drawings]
FIG. 1 shows a transformer according to one embodiment of the present invention, and is a longitudinal side view showing a state where a cover is removed. FIG. 2 is an enlarged view showing the vicinity of a tap switching mechanism. FIG. FIG. 4 is a diagram corresponding to FIG. 1 showing a second conventional example.
11 is a container, 14 is a winding, 15 is an opening, 16 is a cover, 17 is a connection lead wire, 18 is a tap switching mechanism, 19 is a switching operation unit, 21 is a tap switching device, 23 is an insulating member, and 24 is SF Shows 6 gases (refrigerant).

Claims (3)

容器内に収容された巻線と、この巻線に設けられたタップを切り換えるためのタップ切換機構とを具備したものにおいて、
前記タップ切換機構は、タップ切換器と、このタップ切換器の切換操作部とから成り、
前記タップ切換器は前記容器の側壁部に形成された開口部に設けられた着脱可能なカバーの内側に取付けられ、前記切換操作部は前記カバーの外側に取付けられていることを特徴とする静止誘導機器。
In a device equipped with a winding housed in a container and a tap switching mechanism for switching a tap provided on the winding,
The tap switching mechanism includes a tap switching device and a switching operation unit of the tap switching device.
The said tap changer is attached inside the removable cover provided in the opening part formed in the side wall part of the said container, The said switching operation part is attached outside the said cover, The stationary. Induction equipment.
巻線の近傍に絶縁部材が設けられ、カバーを開口部に取付けたとき、巻線のタップとタップ切換器とを接続する接続リード線の途中部分は、前記絶縁部材により巻線側と絶縁されることを特徴とする請求項1記載の静止誘導機器。An insulating member is provided in the vicinity of the winding, and when the cover is attached to the opening, an intermediate portion of the connection lead wire connecting the winding tap and the tap changer is insulated from the winding side by the insulating member. The stationary guidance device according to claim 1, wherein 容器内には冷媒が充填され、開口部は前記容器の下部近傍に設けられていることを特徴とする請求項1または2記載の静止誘導機器。3. The stationary guidance device according to claim 1, wherein the container is filled with a refrigerant, and the opening is provided near a lower portion of the container.
JP22191195A 1995-08-30 1995-08-30 Stationary guidance equipment Expired - Fee Related JP3582906B2 (en)

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JP3582906B2 true JP3582906B2 (en) 2004-10-27

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