JPH0328801B2 - - Google Patents
Info
- Publication number
- JPH0328801B2 JPH0328801B2 JP286483A JP286483A JPH0328801B2 JP H0328801 B2 JPH0328801 B2 JP H0328801B2 JP 286483 A JP286483 A JP 286483A JP 286483 A JP286483 A JP 286483A JP H0328801 B2 JPH0328801 B2 JP H0328801B2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum valve
- tap
- switch
- resistor
- current limiting
- 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 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は開閉素子として真空バルブを用いた負
荷時タツプ切換器用切換開閉器に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a switching switch for an on-load tap changer using a vacuum valve as a switching element.
負荷時タツプ切換用切換開閉器の開閉素子とし
て従来から用いられている油中スイツチや気中ス
イツチに代つて真空バルブを用いると切換性能、
接点寿命および保守性等において極めて優れた性
能が得られる。しかし一般の真空バルブは極間距
離が著しく短いため耐インパルス強度が低いとい
う弱点をもつている。そのためタツプ切換完了後
も開極した真空バルブがタツプ巻線につながつて
いるとかあるいはタツプ切換中過渡的につながる
ということが生じると、タツプ巻線に侵入したイ
ンパルス電圧によつて真空バルブが絶縁破壊する
危険がともなう。
Switching performance can be improved by using a vacuum valve instead of the oil-submerged switch or air-submerged switch that has been conventionally used as the switching element of the switch for tap switching during load.
Extremely excellent performance can be obtained in terms of contact life and maintainability. However, general vacuum valves have a weak point in that their impulse resistance is low because the distance between the poles is extremely short. Therefore, if the open vacuum valve remains connected to the tap winding even after tap switching is complete, or if the connection occurs transiently during tap switching, the vacuum valve will break down due to the impulse voltage that has entered the tap winding. There is a risk of
この問題を解決する一つの手段として真空バル
ブよりインパルス強度の高い断路スイツチを真空
バルブに直列に設け、真空バルブで電流しや断し
た直後に断路スイツチを開いてインパルス電圧が
真空バルブに加わらないようにする手段が考えら
れている。しかしこの手段は真空バルブのほかに
余分な断路スイツチを設ける上、それに対する駆
動機構を必要とするので構造的に複雑になりかつ
大形化し高価なものになる。又、非直線抵抗をタ
ツプ間の接点に設けインパルス電圧を吸収する手
段もある。しかし一般的には非直線抵抗に常時電
圧がかかり非直線抵抗の長期信頼性が低下すると
いう問題点がある。 One way to solve this problem is to install a disconnect switch in series with the vacuum valve, which has a higher impulse strength than the vacuum valve, and open the disconnect switch immediately after the current is cut off by the vacuum valve to prevent impulse voltage from being applied to the vacuum valve. A means to do so is being considered. However, this means requires an extra disconnection switch in addition to the vacuum valve and a drive mechanism therefor, making the structure complex, large-sized, and expensive. There is also a means to absorb the impulse voltage by providing a non-linear resistor at the contact point between the taps. However, there is generally a problem in that a voltage is constantly applied to the non-linear resistor, reducing the long-term reliability of the non-linear resistor.
本発明は開閉素子として真空バルブを用いた負
荷時タツプ切換器用切換開閉器に於て安全で長期
信頼性向上を図り経済的な負荷時タツプ切換器用
切換開閉器を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to improve the safety and long-term reliability of a switch for a tap changer on load that uses a vacuum valve as a switching element, and to provide an economical switch for a tap changer on load.
本発明は以上の目的を達成するために真空バル
ブを用いた２抵抗式の負荷時タツプ切換器用切換
開閉器において、タツプ選択器可動接点と切換開
閉器引出し端子間に第１の真空バルブと第２の真
空バルブを直列に接続し、切換開閉器引出し端子
に近い第２の真空バルブに並列に限流抵抗と非直
線抵抗を接続したことを特徴とするものである。
In order to achieve the above object, the present invention provides a two-resistance type on-load tap changeover switch using a vacuum valve, in which a first vacuum valve and a first vacuum valve are provided between the tap selector movable contact and the changeover switch draw-out terminal. The present invention is characterized in that two vacuum valves are connected in series, and a current limiting resistor and a non-linear resistor are connected in parallel to the second vacuum valve near the switching switch pull-out terminal.
以下本発明を図面に示す一実施例について説明
する。図においてWTは複数のタツプ巻線を有す
るタツプ巻線、T1，T2はタツプWTに形成され
たタツプ、２，３はタツプ選択器の可動接点、
V1，V2，V3，V4は真空バルブ、R1，R2は限流
抵抗、NR1，NR2は非直線抵抗である。真空バ
ルブV2は限流抵抗R1、非直線抵抗NR1と並列に
接続されており、真空バルブV1は真空バルブV2、
限流抵抗R1、及び非直線抵抗NR1の並列回路と
タツプ選択器の可動接点２との間に直列に挿入さ
れている。真空バルブV4は限流抵抗R2、非直線
抵抗NR2と並列に接続されている。真空バルブ
V3は真空バルブV4、限流抵抗R2及び非直線抵抗
NR2の並列回路とタツプ選択器の可動接点３と
の間に直列に挿入されている。
An embodiment of the present invention shown in the drawings will be described below. In the figure, WT is a tap winding having a plurality of tap windings, T 1 and T 2 are taps formed on the tap WT, 2 and 3 are movable contacts of a tap selector,
V 1 , V 2 , V 3 , and V 4 are vacuum valves, R 1 and R 2 are current limiting resistors, and NR 1 and NR 2 are nonlinear resistors. Vacuum valve V 2 is connected in parallel with current limiting resistor R 1 and non-linear resistor NR 1 , vacuum valve V 1 is connected to vacuum valve V 2 ,
A current limiting resistor R 1 and a non-linear resistor NR 1 are inserted in series between the parallel circuit and the movable contact 2 of the tap selector. The vacuum valve V 4 is connected in parallel with a current limiting resistor R 2 and a non-linear resistor NR 2 . vacuum valve
V 3 is the vacuum valve V 4 , current limiting resistor R 2 and non-linear resistor
It is inserted in series between the parallel circuit of NR 2 and the movable contact 3 of the tap selector.
真空バルブV2と限流抵抗R1及び非直線抵抗
NR1の真空バルブV1と接続されてない側は引出
し端子４へ接続されており、また真空バルブV4
と限流抵抗R2及び非直線抵抗NR2の真空バルブ
V3と接続されていない側も引出し端子４へ接続
されている。今図に於て、タツプ選択器の可動接
点２側の回路で通電しているとすると、開極側の
回路のうち真空バルブV4、限流抵抗R2、非直線
抵抗NR2および接続導体８，９とそれに接続さ
れている側の真空バルブV3の一方の接点までは
すべて引出し端子４の電位にあるため、これらと
通電側回路の真空バルブV1，V2、限流抵抗R1、
接続導体５，６とは同電位となり非直線抵抗
NR2には電圧が加わらない。また逆にタツプ選
択器の可動接点３側の回路で通電しているとする
と、真空バルブV2、限流抵抗R1、非直線抵抗
NR1、接続導体６，７及びこれに接続されてい
る側の真空バルブV1の一方の接点迄は全く通電
側回路と同電位となりやはり非直線抵抗NR1に
は電圧が加わらず非直線抵抗の長期信頼性が向上
する。また外部よりのパルス電圧が侵入した場合
真空バルブV3，V4が開極しているときは真空バ
ルブV3に電圧が加わり発弧し限流抵抗R2を通し
て真空バルブV3の放電流が流れることになり、
限流抵抗R2の両端にはサージ電圧が表われる。
このサージ電圧は放電電流が大きい程高くなり真
空バルブV4の発弧防止に設けた非直線抵抗NR2
が動作しタツプ間短絡を防止する。又真空バルブ
V1，V2が開極しているときは上述同様に非直線
抵抗NR1が動作しタツプ間短絡を防止する。 Vacuum valve V 2 and current limiting resistor R 1 and nonlinear resistance
The side of NR 1 that is not connected to the vacuum valve V 1 is connected to the extraction terminal 4, and the side that is not connected to the vacuum valve V 1 is connected to the extraction terminal 4 .
Vacuum valve with current-limiting resistance R 2 and non-linear resistance NR 2
The side not connected to V 3 is also connected to the extraction terminal 4 . In the figure, if the circuit on the movable contact 2 side of the tap selector is energized, the vacuum valve V 4 , current limiting resistor R 2 , nonlinear resistor NR 2 and connecting conductor in the circuit on the opening side 8, 9 and one contact of the vacuum valve V 3 connected thereto are all at the potential of the extraction terminal 4, so these, the vacuum valves V 1 , V 2 of the current-carrying circuit, and the current-limiting resistor R 1 ,
Connecting conductors 5 and 6 have the same potential and non-linear resistance
No voltage is applied to NR 2 . Conversely, if the circuit on the movable contact 3 side of the tap selector is energized, the vacuum valve V 2 , current limiting resistor R 1 , non-linear resistor
NR 1 , the connecting conductors 6 and 7, and one contact of the vacuum valve V 1 connected to these are completely at the same potential as the current-carrying circuit, and no voltage is applied to the non-linear resistance NR 1 , making it a non-linear resistance. Improves long-term reliability. In addition, when a pulse voltage from the outside enters and the vacuum valves V 3 and V 4 are open, the voltage is applied to the vacuum valve V 3 and it fires, causing the discharge current of the vacuum valve V 3 to flow through the current limiting resistor R 2 . It will flow,
A surge voltage appears across the current limiting resistor R2 .
This surge voltage increases as the discharge current increases, and a non-linear resistor NR 2 is installed to prevent the vacuum valve V 4 from firing.
operates to prevent short circuits between taps. Also vacuum valve
When V 1 and V 2 are open, the nonlinear resistor NR 1 operates in the same way as described above to prevent short circuits between the taps.
以上のように本発明では真空バルブ極間に加わ
るサージを吸収する非直線抵抗を常時は電圧が加
わらないように真空バルブに並列に設けたことに
より安全で長期信頼性が向上し耐インパルス性の
すぐれた経済的な負荷時タツプ切換器用切換開閉
器を提供できる。なお本発明は多抵抗式負荷時タ
ツプ切換器用切換開閉器にも適用出来ることは云
うまでもない。
As described above, in the present invention, safety and long-term reliability are improved by providing a non-linear resistor that absorbs surges applied between the vacuum valve poles in parallel with the vacuum valve so that no voltage is constantly applied. It is possible to provide an excellent and economical switching switch for on-load tap changers. It goes without saying that the present invention can also be applied to a switching switch for a multi-resistance type on-load tap changer.
図は本発明による負荷時タツプ切換器用切換開
閉器の一実施例を示す回路図である。
WT……タツプ巻線の一部、T1，T2……タツ
プ、２，３……タツプ選択器の可動接点、V1，
V2，V3，V4……真空バルブ、４……引出し端
子、R1，R2……限流抵抗、５，６，７，８……
導体、NR1，NR2……非直線抵抗。
The figure is a circuit diagram showing an embodiment of a switching switch for an on-load tap changer according to the present invention. WT... Part of the tap winding, T 1 , T 2 ... Tap, 2, 3... Movable contact of the tap selector, V 1 ,
V 2 , V 3 , V 4 ... Vacuum valve, 4 ... Output terminal, R 1 , R 2 ... Current limiting resistor, 5, 6, 7, 8 ...
Conductor, NR 1 , NR 2 ... nonlinear resistance.
Claims (1)
切換用切換開閉器において、タツプ選択器可動接
点と切換開閉器引出し端子間に第１の真空バルブ
と第２の真空バルブを直列に接続し、切換開閉器
引出し端子に近い第２の真空バルブに並列に限流
抵抗と非直線抵抗を接続したことを特徴とする負
荷時タツプ切換器用切換開閉器。1. In a two-resistance type on-load tap switching switch using a vacuum valve, a first vacuum valve and a second vacuum valve are connected in series between the tap selector movable contact and the switching switch pull-out terminal, A switching switch for an on-load tap switch, characterized in that a current limiting resistor and a non-linear resistor are connected in parallel to a second vacuum valve close to the switching switch draw-out terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP286483A JPS59127820A (en) | 1983-01-13 | 1983-01-13 | Change-over switch for on-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP286483A JPS59127820A (en) | 1983-01-13 | 1983-01-13 | Change-over switch for on-load tap changer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59127820A JPS59127820A (en) | 1984-07-23 |
| JPH0328801B2 true JPH0328801B2 (en) | 1991-04-22 |
Family
ID=11541231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP286483A Granted JPS59127820A (en) | 1983-01-13 | 1983-01-13 | Change-over switch for on-load tap changer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59127820A (en) |
-
1983
- 1983-01-13 JP JP286483A patent/JPS59127820A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59127820A (en) | 1984-07-23 |
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