JPS61260516A - Arc extinguishing for high pressure load switch - Google Patents

Arc extinguishing for high pressure load switch

Info

Publication number
JPS61260516A
JPS61260516A JP10324285A JP10324285A JPS61260516A JP S61260516 A JPS61260516 A JP S61260516A JP 10324285 A JP10324285 A JP 10324285A JP 10324285 A JP10324285 A JP 10324285A JP S61260516 A JPS61260516 A JP S61260516A
Authority
JP
Japan
Prior art keywords
arc
thyristor
current
fixed electrode
voltage
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.)
Granted
Application number
JP10324285A
Other languages
Japanese (ja)
Other versions
JPH0574892B2 (en
Inventor
良作 中田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Kouatsu Electric Co
Original Assignee
Nippon Kouatsu Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Kouatsu Electric Co filed Critical Nippon Kouatsu Electric Co
Priority to JP10324285A priority Critical patent/JPS61260516A/en
Publication of JPS61260516A publication Critical patent/JPS61260516A/en
Publication of JPH0574892B2 publication Critical patent/JPH0574892B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541Contacts shunted by semiconductor devices

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本願発明は次に述べる問題点の解決を目的とする。[Detailed description of the invention] The present invention aims to solve the following problems.

(産業上の利用分野) この発明は電源と負荷との間の
電路を開閉するようにしである開閉器において、その開
閉器を作動させる時に生ずるアークを消すようにした方
法に関するものである。
(Industrial Application Field) The present invention relates to a method for extinguishing arcs that occur when the switch is operated to open and close an electric path between a power source and a load.

(従来の技術) この種の高圧負荷開閉器と称すること
のできる種々な形式の開閉器にあっては、電路を開閉す
る場合に可動itiと固定電極との間でアークが生じ、
それらの電極の消耗を早める問題点があった。
(Prior Art) In various types of switches that can be called high-voltage load switches of this type, an arc is generated between the movable iti and the fixed electrode when opening and closing an electric circuit.
There was a problem in that these electrodes wore out quickly.

この問題を解決するために、ダイオードを使用して極小
アークあるいは無アーク状態で消弧する方法は例えば特
公昭39−25702号公報等ですでに知られている。
In order to solve this problem, a method of extinguishing an extremely small arc or without an arc using a diode is already known, for example, in Japanese Patent Publication No. 39-25702.

ところで、これにおいては「・・・可動接触片5が固定
接触片2から離れると抵抗6が入り、2゜5間の発弧を
軽減する0次に可動接触片5が固定第1補助接触片3か
ら離れると更に抵抗6°と整流器(ダイオード)7が入
る。従って可動接触片5が第2補助接触片4を離れよう
と、するときは無電流であるか又は半波電流が流れてい
る・・・」と説明されている。つまり、整流器に印加さ
れる電1iiii圧の方向によって半波はアーク電流が
流れることがある。
By the way, in this case, "... when the movable contact piece 5 separates from the fixed contact piece 2, a resistance 6 is applied, which reduces the arcing between 2° and 5. The movable contact piece 5 becomes the fixed first auxiliary contact piece 3, a resistor 6° and a rectifier (diode) 7 are added.Therefore, when the movable contact piece 5 tries to leave the second auxiliary contact piece 4, either no current or a half-wave current flows. ...'' is explained. In other words, a half-wave arc current may flow depending on the direction of the electric voltage applied to the rectifier.

しかしながらこのように両電極の開閉時(開離時)仮に
半波の間でもアーク電流が流れれば上記の可動接触片6
と第2補助接触片4との間(両電極間)の雰囲気はアー
クによりイオン化されて充分な絶縁回復ができず次の半
波で電源電圧が逆方向になってアーク電流が流れて消弧
に失敗することが充分考えられる。
However, if an arc current flows even during a half-wave when both electrodes are opened and closed (opened), the above movable contact piece 6
The atmosphere between the and second auxiliary contact piece 4 (between both electrodes) is ionized by the arc, and sufficient insulation recovery cannot be achieved, and in the next half wave, the power supply voltage reverses, causing an arc current to flow and extinguishing the arc. It is quite possible that this will fail.

(発明が解決しようとする問題点) この発明は上記従
来の問題点を除き、上記固定電極と可動電極との間に予
め接続しておいたサイリスタを上記アークが生じ始めた
時に正確に導通させる事によって、上記両電極間でのア
ークの発生を抑制できるようにした高圧負荷開閉器にお
ける消弧方法を提供し、ようとするものである。
(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems and enables a thyristor connected in advance between the fixed electrode and the movable electrode to conduct accurately when the above-mentioned arc starts to occur. Accordingly, it is an object of the present invention to provide a method for extinguishing an arc in a high-voltage load switch that can suppress the occurrence of an arc between the two electrodes.

本願発明の構成は次の通りである。The configuration of the present invention is as follows.

(問題点を解決する為の手段) 本願発明は前記請求の
範囲記載の通りの手段を講じたものであってその作用は
次の通りである。
(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(作用) 開閉器における固定電極と可動tiとが離反
しかけてそこにアークが生じ始めた時、それのアーク電
圧によって予めトリガー用の信号の加えられていたサイ
リスタが導通させられる。その結果、上記固定電極と可
動を掻との間は無電圧となりアークの発生が停止する。
(Function) When the fixed electrode and movable ti in the switch begin to separate and an arc begins to occur there, the thyristor to which a trigger signal has been applied in advance is made conductive by the arc voltage. As a result, there is no voltage between the fixed electrode and the movable scraper, and the generation of arc stops.

(実施例) 以下本願の実施例を示す図面について説明
する。第1図において、1は単相乃至三相の交流電源、
2は負荷、3は電源と負荷との間に介設した高圧負荷開
閉器を示す、これにおいて33は金属等からなる密閉ケ
ース、4は電源側端子、5は負荷側端子、6はケース内
に備えられた開閉部を示し、周知の如く固定電極(固定
接点)7とそれに接離する可動電極(可動接点)8とか
らなる0次に9.lOは高耐圧、大電流用のサイリスタ
で、図示される如く逆並列に接続してあり、それらを上
記固定電極7と可動電極8との間に並列に接続しである
。9a、loaはトリガ端子(ゲート)を示す。11は
電路5aに装着した変流器(CT)で、電路の電流を検
出してパルス発生器12に向けて電気信号を発するよう
にしたものである。
(Example) Below, drawings showing examples of the present application will be described. In Fig. 1, 1 is a single-phase to three-phase AC power supply;
2 is a load, 3 is a high-voltage load switch interposed between the power source and the load, in which 33 is a sealed case made of metal, etc., 4 is a terminal on the power supply side, 5 is a terminal on the load side, and 6 is inside the case. As is well-known, the opening/closing part provided in the 0-order 9. IO is a thyristor for high voltage and large current, which are connected in antiparallel as shown in the figure, and are connected in parallel between the fixed electrode 7 and the movable electrode 8. 9a and loa indicate a trigger terminal (gate). Reference numeral 11 denotes a current transformer (CT) attached to the electric line 5a, which detects the current in the electric line and emits an electric signal to the pulse generator 12.

変流器tiによって検出した信号はパルス発生器12に
よりパルス信号に変換して上記サイリスタ9゜lOのゲ
ートに加えるようにしたもので、電路、つまり両電極間
に電流が流れている場合は常時ゲートに対し信号を与え
続けるようになっている。なお、上記においてパルス発
生器12は充電式バッテリまたは別Ti1e、例えば電
源を降圧してAC100■で駆動させるようにしてもよ
い。
The signal detected by the current transformer ti is converted into a pulse signal by the pulse generator 12 and applied to the gate of the thyristor 9゜lO. It continues to send a signal to the gate. In the above, the pulse generator 12 may be driven by a rechargeable battery or another Ti1e, for example, by stepping down the voltage of the power source and driving it at AC100.

上記構成のものにあっては、開閉部6において固定電極
7と可動電極8とが接続された状態においては、交流電
源lからの交流電力はその開閉部6を通って負荷2に供
給される(第4図の(ニ)図の波形参照)。
In the above configuration, when the fixed electrode 7 and the movable electrode 8 are connected in the opening/closing part 6, AC power from the AC power supply l is supplied to the load 2 through the opening/closing part 6. (See the waveform in Figure 4 (d)).

次に開閉部6を開放する時の動作を説明する。Next, the operation when opening/closing section 6 will be explained.

可動電極8が手動操作により動かされて固定電極7から
離反し始めると、それらの間にアーク40が発生し始め
る。この間、第4図の(ホ)図のように変流器11、パ
ルス発生器12からはサイリスタ9゜10のトリガ端子
9a、10aにトリガ信号igを与え続けている。する
とサイリスタ9及び10は、固定電極7と可動1を掻8
との間のその時の電気的な掻性に応じて、その何れか一
方が上記アーク40の発生によるアーク電圧によって導
通する(なおアーク電圧はアーク発生後、サイリスタの
最低動作電圧にすぐ達する)、従って端子4.5の間に
おいてはその導通した側のサイリスタによって通電が行
われ、固定電極7と可動電極8との間は無電圧となって
上記アークが消滅する。やがて電源1の位相がθ°又は
180″となって端子4,5間が0ボルトになると、上
記導通したサイリスタ9又は10はオフとなる。上記初
期アークが消されて上記のようにサイリスタがオフとな
るまでの間において周知の如(可動電i8は固定電極7
から充分に離間させられている為、上記サイリスタ9又
はlOがオフとなる事によって端子4.5間は電気的に
完全に遮断され、負荷2への電源供給が断たれる。
When the movable electrode 8 is manually moved and begins to separate from the fixed electrode 7, an arc 40 begins to occur between them. During this time, the current transformer 11 and pulse generator 12 continue to apply trigger signals ig to the trigger terminals 9a and 10a of the thyristors 9 and 10, as shown in FIG. 4(e). Then, the thyristors 9 and 10 scratch the fixed electrode 7 and the movable 1.
Depending on the current electrical resistance between the two, one of them becomes conductive due to the arc voltage caused by the generation of the arc 40 (the arc voltage immediately reaches the minimum operating voltage of the thyristor after the arc occurs). Therefore, current is supplied between the terminals 4.5 by the thyristor on the conducting side, and there is no voltage between the fixed electrode 7 and the movable electrode 8, so that the arc is extinguished. Eventually, when the phase of the power source 1 becomes θ° or 180'' and the voltage between the terminals 4 and 5 becomes 0 volts, the conductive thyristor 9 or 10 turns off.The initial arc is extinguished and the thyristor turns off as described above. As is well known, the movable electrode i8 is connected to the fixed electrode 7 until it is turned off.
Since the terminals 4 and 5 are sufficiently separated from each other, when the thyristor 9 or IO is turned off, the terminals 4 and 5 are completely electrically cut off, and the power supply to the load 2 is cut off.

向上記サイリスタ9.lOには長くても半波しか電流が
流れない為、を流定格(容量)の小さなもの(例えば3
OA・瞬時通電は600A程度まで可能)で足りる。な
お動作中の波形は第4図の(ホ)図参照。
Improved thyristor 9. Since only a half-wave current flows through lO at most, it is recommended to use one with a small current rating (capacity) (for example, 3
(OA/instantaneous energization is possible up to about 600A) is sufficient. For waveforms during operation, see (e) in Figure 4.

また、今とは逆に開放状態つまり、電路の開放状態より
閉路する場合は次のようになる。即ち図示外の操作ハン
ドルを閉路すべく操作すると可動電極8が逆に動いて固
定電極7に接近するため両者間ではアーク放電が発生し
、アーク電流が流れる。
Also, in the opposite case, when the circuit is closed from the open state, that is, the circuit is closed from the open state, the situation is as follows. That is, when an operation handle (not shown) is operated to close the circuit, the movable electrode 8 moves in the opposite direction and approaches the fixed electrode 7, so that an arc discharge occurs between the two and an arc current flows.

するとこの電流は変流器11で直ちに検出され、サイリ
スタ9.10のゲートにはこのトリガー用の信号が与え
られる。同時に上記の如くサイリスタにはアーク電圧に
より電圧が印加されているためサイリスタは点弧し、電
流はサイリスタに流れる。
This current is then immediately detected by the current transformer 11, and a signal for this trigger is given to the gate of the thyristor 9.10. At the same time, as described above, since voltage is applied to the thyristor by the arc voltage, the thyristor is fired and current flows through the thyristor.

そして上記アーク電圧は時間の経過(可動接点の固定接
点に対する接近)とともにな(なり、電流は両電極間に
のみ流れて通常の電路となる(第4図(へ)図の波形参
照)。
The arc voltage decreases with the passage of time (as the movable contact approaches the fixed contact), and the current flows only between the two electrodes, creating a normal electrical path (see the waveforms in Figure 4).

次に第2図は本願の異なる実施例を示すもので、変流器
11を備えた開閉器の具体的構造を示すものである。図
において21.22はブッシングで、磁器或いはエポキ
シ樹脂で形成される。23は接続端子4fに固定した導
電材製の取付片で、これにはサイリスタ9f、10fが
取付けである。尚サイリスタ9fと1Ofは紙面と垂直
な方向に並設され、がっ、逆並列接続された状態で両電
極7f、af間に並列に接続されている。上記サイリス
タ9fにおいて、24輪アノード、25はカソードを示
す、また両サイリスタのゲート(図示しない)にはパル
ス発生器からのトリガー用の信号が与えられるように接
続されている。11fは主回路5afに流れる電流を検
出する変流器(CT)であり、この検出した信号を図示
外のパルス発生器を経てサイリスタのゲートに対しトリ
ガー用の信号として継続的に与えるようにしたもので、
tf源のブッシング21の外周にブッシングを貫通させ
る状態に取付けられている。27は取付片23に固定し
た絶縁材製の支持体で、可動電極8【に弾力的に接触す
る補助接触片28が取付けである。29は接続片を示す
、30はチューリップ形の固定電極7fに周設した引締
め用のコイルスプリングである。31は図示外の操作ハ
ンドルに連らなる開閉用の胤作軸で、開閉用レバー32
が取付けてありレバー32の矢印方向への揺動によって
可動電極8fが矢印方向に直線運動するようになってい
る。尚本例においては、負荷側の接続端子5fとしてチ
ューリップ形のものが用いてあり、コイルスプリング3
4によって引き締められている。
Next, FIG. 2 shows a different embodiment of the present application, and shows a specific structure of a switch equipped with a current transformer 11. In the figure, 21 and 22 are bushings made of porcelain or epoxy resin. Reference numeral 23 denotes a mounting piece made of a conductive material fixed to the connection terminal 4f, to which the thyristors 9f and 10f are attached. The thyristors 9f and 1Of are arranged in parallel in a direction perpendicular to the plane of the paper, and are connected in parallel between the electrodes 7f and af in an antiparallel connection state. In the thyristor 9f, the 24-wheel anode, 25 indicates a cathode, and the gates (not shown) of both thyristors are connected to receive a trigger signal from a pulse generator. 11f is a current transformer (CT) that detects the current flowing in the main circuit 5af, and this detected signal is continuously given as a trigger signal to the gate of the thyristor via a pulse generator (not shown). Something,
It is attached to the outer periphery of the bushing 21 of the TF source so as to pass through the bushing. Reference numeral 27 denotes a support made of an insulating material fixed to the mounting piece 23, and an auxiliary contact piece 28 that elastically contacts the movable electrode 8 is attached. Reference numeral 29 indicates a connecting piece, and reference numeral 30 indicates a tightening coil spring provided around the tulip-shaped fixed electrode 7f. Reference numeral 31 indicates an opening/closing shaft connected to an operation handle (not shown), and an opening/closing lever 32.
is attached so that when the lever 32 swings in the direction of the arrow, the movable electrode 8f moves linearly in the direction of the arrow. In this example, a tulip-shaped connection terminal 5f is used on the load side, and the coil spring 3
It is tightened by 4.

上記構成のものにあっては、図示される如き投入状態に
おいて電流は電源側端子4f、固定電極7f、可動電極
8f、負荷側端子5fの主回路5afに流れる。そして
変流器11fと図示外のパルス発生器から成るトリガー
信号発生器からはトリガー用の信号が上記サイリスタに
常時流れている。
In the above-mentioned configuration, in the turned-on state as shown in the figure, current flows through the main circuit 5af of the power supply side terminal 4f, the fixed electrode 7f, the movable electrode 8f, and the load side terminal 5f. A trigger signal is constantly flowing to the thyristor from a trigger signal generator consisting of a current transformer 11f and a pulse generator (not shown).

上記状態において、操作軸31の開放操作により可動電
極8fが図の状態から右方へ移動し始め、先端33が固
定電極7「から離れると、先端33と固定電極7fとの
間にアークが発生し始める9発生したアーク電圧はサイ
リスタがまだ固定補助接触片28を介して固定1i11
8fに接触しているためサイリスタに印加される。そし
てその電圧が最低動作電圧に達するとサイリスタは直ち
にオン状態となり、同サイリスタに電流は移行する。つ
まり、アーク電圧が発生した状態においては主回路には
依然としてアーク電流が流れているため、変流器11f
がこの電流を検出してゲートにはトリガー用の信号を与
え続けるため、上記の如くアーク電圧がサイリスタの最
低動作電圧に達すると直ちに同サイリスタはオン状態と
なる。そして接VtFa子4「と可動電極8fとの間に
おいては取付片23、サイリスタ9f(又は1Of)、
接続片29、補助接触片28を通る経路で通電がなされ
る。その結果、固定電極7fと可動電極8fの先端33
との間は無電圧となり、上記アークが消滅する。やがて
1itSの位相が0″又は1806となるとサイリスタ
9f(又は10r)はオフとなり、接続端子4f、5f
間の1lliifが遮断される。更に引き続いて可動電
極8rが右方へ移動することによりやがてその先端33
が補助接触片28から離れるが、その一時には既にサイ
リスタ9「 (又は10f)がオフと、なっている為、
先端33が補助接触片28から離れてもそこでアークが
生ずるようなことは無い、このようにして先端33が想
像線で示される如き位置まで至ることにより、接続端子
4r、5f間は電気的、機械的に完全に開放された状態
となる。
In the above state, when the operating shaft 31 is opened, the movable electrode 8f begins to move from the state shown in the figure to the right, and when the tip 33 separates from the fixed electrode 7'', an arc is generated between the tip 33 and the fixed electrode 7f. 9 The generated arc voltage is applied to the thyristor which is still fixed via the fixed auxiliary contact piece 28.
Since it is in contact with 8f, it is applied to the thyristor. When the voltage reaches the minimum operating voltage, the thyristor is immediately turned on and current is transferred to the thyristor. In other words, when arc voltage is generated, arc current still flows through the main circuit, so current transformer 11f
detects this current and continues to apply a trigger signal to the gate, so as soon as the arc voltage reaches the minimum operating voltage of the thyristor, the thyristor turns on as described above. Between the contact VtFa element 4'' and the movable electrode 8f, a mounting piece 23, a thyristor 9f (or 1Of),
Electricity is supplied through a path passing through the connection piece 29 and the auxiliary contact piece 28. As a result, the tips 33 of the fixed electrode 7f and the movable electrode 8f
There is no voltage between the two and the arc disappears. Eventually, when the phase of 1itS becomes 0'' or 1806, thyristor 9f (or 10r) turns off, and connection terminals 4f and 5f
1lliif in between is cut off. As the movable electrode 8r continues to move to the right, its tip 33 eventually
moves away from the auxiliary contact piece 28, but at that moment thyristor 9' (or 10f) is already off, so
Even if the tip 33 separates from the auxiliary contact piece 28, no arc will occur there. By reaching the tip 33 in this way to the position shown by the imaginary line, the connection terminals 4r and 5f are electrically connected. It is mechanically completely opened.

一方開閉器を投入する場合においては、可動電極8fの
先端33が想像線で示される位置から左方へ移動してく
ると先ず先端33が補助接触片28に接触する。この場
合、サイリスタはオフとなっている為、何等の現象も生
じない、やがて先端33が固定電極7fに極めて近接す
ると両者間において先行放tのアークが発生する。この
アークの発生によって主回路5af(両接点)には電流
が流れ、この電流は変流器11によって検出され、検出
された信号はサイリスタのゲートに対しトリガー用の信
号として継続的に与えられる。また同時にアーク電圧が
サイリスタに印加され、それが最低動作電圧に達すると
サイリスタは直ちにオン状態となり電流はサイリスタに
移行する。そして可動電極8fが更に左方に動いて先端
33が固定電極7【に完全に接触すると極間電圧がOと
なり、サイリスタに流れる電流がその保持電流以下とな
ってサイリスタはオフ状態となる。この状態において、
電流は電源側端子4f、固定電極7f、可動1を掻8f
、負荷側端子5rの主回路に流れる状態となる。
On the other hand, when closing the switch, when the tip 33 of the movable electrode 8f moves to the left from the position shown by the imaginary line, the tip 33 first contacts the auxiliary contact piece 28. In this case, since the thyristor is off, no phenomenon occurs. Eventually, when the tip 33 comes very close to the fixed electrode 7f, a pre-emission arc is generated between the two. Due to the generation of this arc, a current flows through the main circuit 5af (both contacts), this current is detected by the current transformer 11, and the detected signal is continuously given to the gate of the thyristor as a trigger signal. At the same time, an arc voltage is applied to the thyristor, and when it reaches the minimum operating voltage, the thyristor is immediately turned on and current is transferred to the thyristor. Then, when the movable electrode 8f moves further to the left and the tip 33 comes into complete contact with the fixed electrode 7, the voltage between the electrodes becomes O, the current flowing through the thyristor becomes less than its holding current, and the thyristor turns off. In this state,
The current flows through the power supply side terminal 4f, the fixed electrode 7f, and the movable electrode 8f.
, the current flows to the main circuit of the load side terminal 5r.

なお、機能上前図のものと同−又は均等構成と考えられ
る部分には、前回と同一の符号にアルファベットのfを
付して重複する説明を省略した。
In addition, the parts that are considered to have the same or equivalent structure as those in the previous figure in terms of function are given the same reference numerals as in the previous figure with the letter f, and redundant explanations are omitted.

(また次回のものにおいても、同様の考えでアル0フア
ベフトのeを付して、重複する説明を省略する。) 次に、第3図は固定接点7eと可動接点8eとさらには
固定補助接触片2111eからなるシスコン部の異なっ
た他の例を示したもので、第2図においては可動電極が
棒状に形成されているのに対して第3図のものは可動接
点がブレード形になっていることが相違する。つまり、
電路を開放する場合に(イ)図の状態から可動接点8e
が動くと、これは(ロ)図の如く固定接点7eから離間
し、その後は固定接触片28eにだけ一時的に接触し、
さらに同可動接点が動くと(ハ)図の如く同接触片から
離脱してサイリスタ9eは電路から完全に切り離される
ようになっている。
(Also, in the next version, the same concept is used and the redundant explanation will be omitted.) Next, FIG. This figure shows another example of a system controller consisting of a piece 2111e. In FIG. 2, the movable electrode is formed into a rod shape, whereas in FIG. 3, the movable contact is shaped like a blade. The difference is that they are there. In other words,
When opening the electric circuit, (a) move the movable contact 8e from the state shown in the figure.
When it moves, it separates from the fixed contact 7e as shown in the figure (B), and then only temporarily contacts the fixed contact piece 28e,
When the movable contact further moves, it separates from the contact piece as shown in the figure (c), and the thyristor 9e is completely disconnected from the electric circuit.

(発明の効果) 以上のように本発明にあっては、高圧
負荷開閉器3における可動電極8と固定電極7とを電源
1から負荷2への電路の遮断の為に離反させる場合、そ
れら両電極間でアークが生じかけても、予め上記両電極
間に接続しておいたサイリスタ9.lOを導通させて上
記両電極間の上記アークを消して上記可動電極8及び固
定電1f17の消耗を防止できる効果がある。
(Effects of the Invention) As described above, in the present invention, when the movable electrode 8 and the fixed electrode 7 in the high-voltage load switch 3 are separated in order to interrupt the electric path from the power supply 1 to the load 2, Even if an arc is about to occur between the electrodes, the thyristor 9. connected in advance between the two electrodes. This has the effect of making IO conductive and extinguishing the arc between the two electrodes, thereby preventing the movable electrode 8 and the fixed electrode 1f17 from being consumed.

また上記両電極の開離時、電源電圧の極性が正負のいず
れであっても上記のごとく逆並列のサイリスタ9.10
が両電極に対し並列に接続されているため、両を極間の
開離動作とも相まって半サイクル以下で確実に消弧でき
、上記電極の消耗をより一層少なくする上に効果がある
Furthermore, when the above-mentioned two electrodes are opened, regardless of whether the polarity of the power supply voltage is positive or negative, the anti-parallel thyristors 9 and 10 are connected as described above.
Since the electrodes are connected in parallel to both electrodes, combined with the opening operation between the electrodes, the arc can be reliably extinguished in less than half a cycle, which is effective in further reducing wear and tear on the electrodes.

その上、上記の場合、上記可動電極と固定電極を通る電
流があるときには、高い信頼性を有する変流器11によ
って電流を検出し、常時上記のサイリスタにトリガー用
の信号が加わるようにしであるため、可動と固定の両電
極間でアーク電流が生ずると直ちにサイリスタが導通す
るから、アークの発生時に対してサイリスタの導通によ
る消弧作用の遂行がぴったりと同期して、消弧の確実性
を高め、極めて高い信鯨度のもとに上記の効果が逼られ
る。
Moreover, in the above case, when there is a current passing through the movable electrode and the fixed electrode, the current is detected by the highly reliable current transformer 11 so that a triggering signal is always applied to the thyristor. Therefore, as soon as an arc current occurs between the movable and fixed electrodes, the thyristor becomes conductive. Therefore, when an arc occurs, the conduction of the thyristor performs the arc-extinguishing action in perfect synchronization, ensuring that the arc is extinguished. The above effects are achieved with an extremely high level of confidence.

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

図面は本願の実施例を示すもので、第1図は電源と負荷
との間の接続回路のブロック図、第2図は異なる実施例
を示す開閉器の縦断面図、第3図の(イ)(ロ)(ハ)
の図はシスコン部の異なる例を示す動作説明図、第4図
の(ニ)(ホ) (へ)の図は夫々波形図。 l・・・電源、2・・・負荷、7・・・固定電極、8・
・・可動電極、9.lO・・・サイリスタ、11・・・
変流器(CT)。 −+   荀    句        、、:   
   +:#   m   112.   −−   
  >                     −
>   ・−弓 〉−、デ  −V  、、:
The drawings show an embodiment of the present application, in which Fig. 1 is a block diagram of a connection circuit between a power source and a load, Fig. 2 is a vertical cross-sectional view of a switch showing a different embodiment, and Fig. ) (b) (c)
4 is an operation explanatory diagram showing different examples of the system controller, and the diagrams (D), (E), and (F) in FIG. 4 are waveform diagrams, respectively. l...power supply, 2...load, 7...fixed electrode, 8.
...Movable electrode, 9. lO...Thyristor, 11...
Current transformer (CT). −+ Xun phrase ,,:
+:#m 112. ---
> −
>・-Bow>-, De-V,,:

Claims (1)

【特許請求の範囲】[Claims] 電源と負荷との間に電路開閉用の可動電極及び固定電極
を備えた高圧負荷開閉器を介在せしめ、しかも上記可動
電極と固定電極に対しては、逆並列接続したサイリスタ
を並列に接続し、かつ、上記可動電極と固定電極を通る
電流があるときにはその電流を変流器で検出し、この検
出信号を用いて常時上記のサイリスタにトリガー用の信
号が加わるようにしておき、上記可動電極と固定電極と
を上記電路の遮断の為に離反させるときにアークが発生
すると、上記サイリスタに上記の両電極間で生ずるアー
ク電圧が加わって上記サイリスタを導通させることによ
り、上記両電極間のアークを消すようにすることを特徴
とする高圧負荷開閉器における消弧方法。
A high-voltage load switch equipped with a movable electrode and a fixed electrode for switching the electric circuit is interposed between the power supply and the load, and thyristors connected in anti-parallel are connected in parallel to the movable electrode and the fixed electrode, In addition, when there is a current passing through the movable electrode and the fixed electrode, the current is detected by a current transformer, and this detection signal is used to constantly apply a trigger signal to the thyristor. If an arc occurs when the fixed electrode is separated from the fixed electrode to interrupt the electrical path, the arc voltage generated between the two electrodes is applied to the thyristor, causing the thyristor to conduct, thereby eliminating the arc between the two electrodes. A method for extinguishing an arc in a high-voltage load switch.
JP10324285A 1985-05-15 1985-05-15 Arc extinguishing for high pressure load switch Granted JPS61260516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10324285A JPS61260516A (en) 1985-05-15 1985-05-15 Arc extinguishing for high pressure load switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10324285A JPS61260516A (en) 1985-05-15 1985-05-15 Arc extinguishing for high pressure load switch

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP23672790A Division JPH0770277B2 (en) 1990-09-05 1990-09-05 High-voltage load switch

Publications (2)

Publication Number Publication Date
JPS61260516A true JPS61260516A (en) 1986-11-18
JPH0574892B2 JPH0574892B2 (en) 1993-10-19

Family

ID=14348969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10324285A Granted JPS61260516A (en) 1985-05-15 1985-05-15 Arc extinguishing for high pressure load switch

Country Status (1)

Country Link
JP (1) JPS61260516A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065053U (en) * 1991-11-11 1994-01-21 忠 邱 李 Arc discharge elimination circuit for contacts
JPH09237542A (en) * 1996-02-27 1997-09-09 Mitsubishi Electric Corp Switching device
JP2010532907A (en) * 2007-02-02 2010-10-14 アーベーベー・リサーチ・リミテッド Switching device, its use and method for switching
EP2523203A1 (en) * 2011-05-10 2012-11-14 ABB Technology AG Switching device and related switchgear

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065053U (en) * 1991-11-11 1994-01-21 忠 邱 李 Arc discharge elimination circuit for contacts
JPH09237542A (en) * 1996-02-27 1997-09-09 Mitsubishi Electric Corp Switching device
JP2010532907A (en) * 2007-02-02 2010-10-14 アーベーベー・リサーチ・リミテッド Switching device, its use and method for switching
EP2523203A1 (en) * 2011-05-10 2012-11-14 ABB Technology AG Switching device and related switchgear
US9099260B2 (en) 2011-05-10 2015-08-04 Abb Technology Ag Switching device and related switchgear
US9659722B2 (en) 2011-05-10 2017-05-23 Abb Schweiz Ag Switching device and related switchgear

Also Published As

Publication number Publication date
JPH0574892B2 (en) 1993-10-19

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