JPH0351084B2 - - Google Patents
Info
- Publication number
- JPH0351084B2 JPH0351084B2 JP18084380A JP18084380A JPH0351084B2 JP H0351084 B2 JPH0351084 B2 JP H0351084B2 JP 18084380 A JP18084380 A JP 18084380A JP 18084380 A JP18084380 A JP 18084380A JP H0351084 B2 JPH0351084 B2 JP H0351084B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- low
- voltage side
- side winding
- winding
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 63
- 239000003990 capacitor Substances 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 21
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/343—Preventing or reducing surge voltages; oscillations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Description
【発明の詳細な説明】
本発明は静止誘導電器に係り、特に複数段に巻
回された低圧側巻線に静電的移行電圧の移行を防
止する防止手段が設けられている静止誘導電器に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a static induction appliance, and more particularly to a static induction appliance in which a low-voltage side winding wound in multiple stages is provided with a prevention means for preventing electrostatic transition voltage from shifting. It is something.
静止誘導電器例えば変圧器は２つ以上の巻線で
構成されており、電圧を変換するという目的から
その巻線は通常高圧側巻線と低圧側巻線とに分類
される。その高圧側巻線と低圧側巻線に接続され
る系統との絶縁協調によつて定められた絶縁レベ
ルに耐えるように絶縁製作される。また低圧側巻
線は高圧側巻線と静電的、電磁的に結合されてお
り、高圧側巻線に衝撃電圧が侵入し場合には静電
的、電磁的結合により移行電圧と呼ばれる衝撃電
圧が低圧側巻線に誘起される。従つて低圧側巻線
は定められた絶縁レベルに耐えると共に移行電圧
にも耐える必要があり、更にこの移行電圧を低圧
側系統に移行することを防止しなければならな
い。 A stationary induction electric appliance, such as a transformer, is composed of two or more windings, and for the purpose of converting voltage, the windings are usually classified into a high-voltage side winding and a low-voltage side winding. The insulation is manufactured to withstand the insulation level determined by the insulation coordination between the high voltage side winding and the system connected to the low voltage side winding. In addition, the low-voltage winding is electrostatically and electromagnetically coupled to the high-voltage winding, and if shock voltage enters the high-voltage winding, the electrostatic and electromagnetic coupling causes a shock voltage called transition voltage. is induced in the low voltage side winding. The low-voltage winding must therefore withstand a defined insulation level and also withstand the transition voltage, and must also prevent this transition voltage from being transferred to the low-voltage system.
この移行電圧のうち静電的移行電圧を移行を防
止する方法として、従来２つの方法が実施されて
いる。その１つは高低圧側巻線の間に主絶縁にシ
ールドを入れ、そのシールドを接地して高圧側巻
線から低圧側巻線を静電的に遮蔽し、静電的移行
電圧を低くする方法である。しかしこの方法には
次のような欠点がある。すなわち高低圧側巻線間
の主絶縁に大地電位を持つシールドが挿入される
ため、高圧、低圧側巻線からシールドまでは夫々
にその絶縁レベルに必要な絶縁距離をとらなけれ
ばならなくなつて、主絶縁の距離が大きくなり、
高圧、低圧側巻線の寸法即ち変圧器が大きくな
る。またシールドは漏れ磁束の大きい主絶縁に入
れられるため、シールドと鎖交する磁束により損
失を発生すると共にローカルヒートをひきおこす
原因ともなる。 Two methods have been conventionally implemented to prevent the electrostatic transition voltage from shifting among these transition voltages. One method is to insert a shield in the main insulation between the high and low voltage side windings, and ground the shield to electrostatically shield the low voltage side winding from the high voltage side winding, thereby lowering the electrostatic transition voltage. It is. However, this method has the following drawbacks. In other words, since a shield with earth potential is inserted into the main insulation between the high and low voltage side windings, it is necessary to provide the required insulation distance from the high and low voltage side windings to the shield, respectively. The main insulation distance increases,
The dimensions of the high-voltage and low-voltage side windings, ie, the transformer, become larger. Furthermore, since the shield is placed in the main insulation with large leakage magnetic flux, the magnetic flux interlinking with the shield causes loss and causes local heat.
もう１つの静電的移行電圧の移行を防止する方
法は、低圧側巻線端子と大地との間にサージアブ
ソーバとしてコンデンサを接続する方法である。
これはこの接続するコンデンサの静電容量を高圧
側巻線と低圧側巻線との間の静電容量よりも十分
に大きくすることにより、低圧側巻線への静電的
移行電圧を小さくする方法である。この方法は変
圧器外部にサージアブソーバとしてのコンデンサ
を取り付けるために変圧器外部構成が複雑とな
り、かつそのサージアブソーバのメンテナンスを
必要とするといつた欠点があつた。 Another method for preventing electrostatic transition voltage transition is to connect a capacitor as a surge absorber between the low voltage side winding terminal and the ground.
This reduces the electrostatic transfer voltage to the low voltage side winding by making the capacitance of the connected capacitor sufficiently larger than the capacitance between the high voltage side winding and the low voltage side winding. It's a method. This method has the disadvantage that the external structure of the transformer is complicated because a capacitor is attached as a surge absorber to the outside of the transformer, and maintenance of the surge absorber is required.
本発明は以上の点に鑑みなされたものであり、
その目的とするところは、低圧側巻線への静電的
移行電圧の移行防止が容易な静止誘導電器を提供
するにある。 The present invention has been made in view of the above points,
The purpose is to provide a static induction appliance in which transfer of electrostatic transfer voltage to the low-voltage side winding can be easily prevented.
すなわち本発明は、防止手段を、低圧側巻線の
各段間を接続するリード線と、このリード線とタ
ンクとの間を接続するコンデンサとから形成して
なることを特徴とするものである。 That is, the present invention is characterized in that the prevention means is formed from a lead wire connecting each stage of the low voltage side winding and a capacitor connecting between this lead wire and the tank. .
低圧側巻線はそれが星形結線あるいはデルタ結
線であつても、その端子電圧に比べ低圧側巻線内
の常規対地電圧は低い。一方、コンデンサの容量
Ｐ（VA）は、印加電圧をＥ（Ｖ）、コンデンサの
静電容量をＣ（Ｆ）、電源周波数をｆ（Hz）とすれ
ば次式で与えられる。 Even if the low-voltage winding is star-shaped or delta-connected, the normal voltage to ground within the low-voltage winding is lower than its terminal voltage. On the other hand, the capacitance P (VA) of the capacitor is given by the following equation, where the applied voltage is E (V), the capacitance of the capacitor is C (F), and the power supply frequency is f (Hz).
Ｐ＝2πfCE2
この式から明らかなようにコンデンサの容量Ｐ
が一定であれば、その静電容量Ｃは印加される電
圧Ｅの２乗に反比例する。すなわち同一コンデン
サであればそれに印加される電圧が低いほどその
静電容量は大きい。従つて低圧側巻線内部と大地
との間にコンデンサを接続すれば、低圧側巻線端
子に接続するよりも同一コンデンサであつても静
電容量を大きくとれ、静電的移行電圧の移行をよ
り効果的に防止できることを見出した。そこで本
発明では防止手段を、低圧側巻線の各段間を接続
するリード線と、このリード線とタンクとの間を
接続するコンデンサとから形成したものである。
このようにすることにより低圧側巻線への静電的
移行電圧の移行防止が容易な静止誘導電器を得る
ことを可能としたものである。 P=2πfCE 2As is clear from this formula, the capacitance P of the capacitor
If E is constant, the capacitance C is inversely proportional to the square of the applied voltage E. That is, for the same capacitor, the lower the voltage applied to it, the greater its capacitance. Therefore, if you connect a capacitor between the inside of the low-voltage winding and the ground, you can obtain a larger capacitance than if you connect it to the low-voltage winding terminal, even if it is the same capacitor, and this will reduce the electrostatic transition voltage transition. We have found that this can be prevented more effectively. Therefore, in the present invention, the prevention means is formed from a lead wire connecting each stage of the low voltage side winding and a capacitor connecting between this lead wire and the tank.
By doing so, it is possible to obtain a stationary induction appliance in which transfer of electrostatic transfer voltage to the low-voltage side winding can be easily prevented.
以下、図示した実施例について説明する。第１
図から第５図には一実施例が示されている。第１
図は変圧器の１相分の断面を概念的に表わした図
である。鉄心１には低圧側巻線２，３とその外側
に高圧側巻線４とか巻かれている。低圧側巻線
２，３は２段に巻かれており、内側の低圧側巻線
２から引き出されたリード線６は巻線外に引き出
され、外側の低圧側巻線３に接続される。これは
２段に巻かれている低圧側巻線の対向巻線２，３
間の発生電圧を小さくするために実施している接
続法で、ちようどＮ字状（あるいは逆Ｎ字状）に
接続することからＮ接続と称する。なお同図で
ｕ、ｖは低圧側巻線端子、Ｕ、VHF高圧側巻線
端子である。この高低圧側巻線２〜４外に引き出
されたリード線６と大地５（タンクは一般に接地
して使用されるので大地５はとりもなおさずタン
ク５である）との間に、静電的移行電圧防止用の
コンデンサ７を接続した。このようにすることに
よりリード線６の常規対地電圧は第２図（低圧側
巻線の３相の決戦を示してある）に示してあるよ
うに低圧側巻線内の中点にあるので、低圧側巻線
端子（ｕ、ｖ、ｗ）の電圧Ｅに比べて半分の1/2
Ｅとなり、リード線６に接続したコンデンサ７の
静電容量は低圧側巻線端子（ｕ、ｖ、ｗ）に接続
した場合に比べ４倍となる。従つてそれだけより
容易に静電的移行電圧の移行防止が可能となる。
そして第３図に示してあるように高圧側巻線４に
衝撃電圧Vsが侵入したとき低圧側巻線２，３に
移行する静電的移行電圧VLは、高圧側巻線４と
低圧側巻線２，３との間の静電容量をCHL、低圧
側巻線２，３と鉄心１（鉄心１も通常接地されて
いる）すなわち大地間との静電容量をCLE、リー
ド線に接続した静電的移行電圧防止用のコンデン
サ７の静電容量をCcとすれば次式で表わされる。 The illustrated embodiment will be described below. 1st
One embodiment is shown in FIGS. 5 to 5. 1st
The figure is a diagram conceptually showing a cross section of one phase of a transformer. The iron core 1 has low voltage side windings 2 and 3 and a high voltage side winding 4 wound on the outside thereof. The low-voltage windings 2 and 3 are wound in two stages, and a lead wire 6 drawn out from the inner low-voltage winding 2 is drawn out of the windings and connected to the outer low-voltage winding 3. This is the opposite winding 2 and 3 of the low voltage side winding wound in two stages.
This connection method is used to reduce the voltage generated between the two terminals, and is called N-connection because it is connected in an N-shape (or inverted N-shape). Note that in the figure, u and v are low voltage side winding terminals, and U is a VHF high voltage side winding terminal. There is an electrostatic potential between the lead wire 6 drawn out of the high and low voltage side windings 2 to 4 and the ground 5 (the ground 5 is the tank 5 since the tank is generally used while being grounded). A capacitor 7 for preventing transition voltage was connected. By doing this, the normal ground voltage of the lead wire 6 is at the midpoint within the low voltage side winding, as shown in Figure 2 (showing the decisive battle of the three phases of the low voltage side winding). 1/2 of the voltage E at the low voltage side winding terminals (u, v, w)
E, and the capacitance of the capacitor 7 connected to the lead wire 6 is four times that of the capacitor 7 connected to the low voltage side winding terminals (u, v, w). Therefore, it becomes possible to prevent the electrostatic transition voltage from shifting more easily.
As shown in FIG. 3, when the shock voltage V s enters the high-voltage winding 4, the electrostatic transition voltage V L that transfers to the low-voltage windings 2 and 3 is the difference between the high-voltage winding 4 and the low-voltage winding 4. The capacitance between the side windings 2 and 3 is C HL , and the capacitance between the low voltage side windings 2 and 3 and the iron core 1 (core 1 is also normally grounded), that is, the earth, is C LE , and the lead Letting the capacitance of the capacitor 7 connected to the line for preventing electrostatic transition voltage be C c , it is expressed by the following equation.
VL＝CHL／CHL＋CLE＋Cc×Vs
ところで変圧器において高圧側巻線４と低圧側
巻線２，３との間に静電容量CHLおよび低圧側巻
線２，３とタンクとの間の静電容量CLEは一般に
数千PEのオーダである。従つて静電的移行電圧
防止用のコンデンサ７の静電容量CcはμFのオー
ダのものを入れることにより、静電的移行電圧
VLを殆んど零にすることが可能となる。 V L = C HL / C HL + C LE + C c × V sBy the way, in the transformer, there is a capacitance C HL between the high voltage side winding 4 and the low voltage side windings 2, 3, and the low voltage side windings 2, 3. The capacitance C LE to the tank is generally on the order of several thousand PE. Therefore, by adding a capacitance C c of the order of μF to the capacitor 7 for preventing electrostatic transition voltage, the electrostatic transition voltage can be reduced.
It becomes possible to reduce V L to almost zero.
静電的移行電圧防止用のコンデンサ７の変圧器
内部への設置は第４図および第５図に示されてい
るように、鉄心１の下部締金具８の側面に配置す
る。このようにすることにより設置が容易である
ばかりでなく、変圧器内のデツドスペースが有効
に活用され、変圧器タンク５内に満たされる油を
少なくすることができる。 The capacitor 7 for preventing electrostatic transition voltage is installed inside the transformer on the side surface of the lower fastener 8 of the iron core 1, as shown in FIGS. 4 and 5. By doing so, not only is the installation easy, but the dead space within the transformer is effectively utilized, and the amount of oil filled in the transformer tank 5 can be reduced.
なお本実施例では低圧側巻線が２段で、所謂Ｎ
接続の場合について説明したが、２段でなくより
多段に巻回された場合あるいはＮ接続でなくその
接続をＵ字状（あるいは逆Ｕ字状）に接続すると
ころからＵ接続と称している所謂Ｕ接続の場合に
も同様な作用効果を奏することができる。 In this embodiment, the low voltage side winding has two stages, so-called N
We have explained the connection case, but it is called a U-connection because it is wound in multiple stages instead of two stages, or the connection is connected in a U-shape (or inverted U-shape) instead of an N-connection. Similar effects can be achieved in the case of U-connection.
上述のように本発明は、防止手段、低圧側巻線
の各段間を接続するリード線と、このリード線と
タンクとの間に接続するコンデンサとから形成し
たので、コンデンサの容量を容易に大きくするこ
とができるようになつて、静電的移行電圧の移行
防止が容易となり、低圧側巻線への静電的移行電
圧の移行防止が容易な静止誘導電器を得ることが
できる。 As described above, the present invention is formed from the prevention means, a lead wire connecting each stage of the low voltage side winding, and a capacitor connected between this lead wire and the tank, so that the capacitance of the capacitor can be easily increased. By making it possible to increase the voltage, it becomes easy to prevent electrostatic transfer voltage from transferring, and it is possible to obtain a static induction device in which it is easy to prevent electrostatic transfer voltage from transferring to the low-voltage side winding.
第１図は本発明の静止誘導電器の一実施例の静
電的移行電圧防止用コンデンサの挿入を示す説明
図、第２図は本発明の静止誘導電器の一実施例の
低圧側巻線の常規対地電位を示す説明図、第３図
は本発明の静止誘導電器の一実施例の静電的特価
回路、第４図は本発明の静止誘導電器の一実施例
の静電的移行電圧防止用コンデンサの配置を示す
正面図、第５図は同じく側面図である。
１……鉄心、２，３……低圧側巻線、４……高
圧側巻線、５……タンク（大地）、６……リード
線、７……コンデンサ。
FIG. 1 is an explanatory diagram showing the insertion of a capacitor for preventing electrostatic transition voltage in an embodiment of the static induction device of the present invention, and FIG. An explanatory diagram showing the normal ground potential, FIG. 3 is an electrostatic special circuit of an embodiment of the static induction device of the present invention, and FIG. 4 is an electrostatic transition voltage prevention circuit of an embodiment of the static induction device of the present invention. FIG. 5 is a front view showing the arrangement of the capacitors, and FIG. 5 is a side view as well. 1... Iron core, 2, 3... Low voltage side winding, 4... High voltage side winding, 5... Tank (earth), 6... Lead wire, 7... Capacitor.
Claims (1)
高圧側巻線と複数段に巻回された低圧側巻線とを
備え、前記低圧側巻線には静電的移行電圧の移行
を防止する防止手段が設けられている静止誘導電
器において、前記防止手段を、前記低圧側巻線の
各段間を接続するリード線と、このリード線と前
記タンクとの間を接続するコンデンサとから形成
してなることを特徴とする静止誘導電器。1 A grounded tank is equipped with a high-voltage side winding wound around an iron core and a low-voltage side winding wound in multiple stages, and the low-voltage side winding is equipped to prevent transfer of electrostatic transition voltage. In a stationary induction electric appliance, the prevention means is formed of a lead wire connecting between each stage of the low voltage side winding and a capacitor connecting between this lead wire and the tank. A stationary induction electric appliance characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18084380A JPS57104210A (en) | 1980-12-19 | 1980-12-19 | Stationary inductive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18084380A JPS57104210A (en) | 1980-12-19 | 1980-12-19 | Stationary inductive apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57104210A JPS57104210A (en) | 1982-06-29 |
| JPH0351084B2 true JPH0351084B2 (en) | 1991-08-05 |
Family
ID=16090321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18084380A Granted JPS57104210A (en) | 1980-12-19 | 1980-12-19 | Stationary inductive apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57104210A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2094058A1 (en) * | 1992-05-06 | 1993-11-07 | Randall J. Wright | Tubular level instrument and method of construction |
-
1980
- 1980-12-19 JP JP18084380A patent/JPS57104210A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57104210A (en) | 1982-06-29 |
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