JPH0574892B2 - - Google Patents
Info
- Publication number
- JPH0574892B2 JPH0574892B2 JP10324285A JP10324285A JPH0574892B2 JP H0574892 B2 JPH0574892 B2 JP H0574892B2 JP 10324285 A JP10324285 A JP 10324285A JP 10324285 A JP10324285 A JP 10324285A JP H0574892 B2 JPH0574892 B2 JP H0574892B2
- Authority
- JP
- Japan
- Prior art keywords
- thyristor
- electrode
- movable electrode
- arc
- fixed electrode
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 206010014357 Electric shock Diseases 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Keying Circuit Devices (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は電極と負荷との間の電路を開閉する
ようにしてある高圧負荷開閉器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high-voltage load switch configured to open and close an electric path between an electrode and a load.
（従来の技術）
この種の高圧負荷開閉器にあつては電路を開閉
する場合に可動電極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つ
た。(Prior Art) This type of high-voltage load switch has the problem that arcs occur between the movable electrode and the fixed electrode when the electric circuit is opened and closed, which accelerates the wear and tear of these electrodes.
これを解決するために可動電極と固定電極との
間にアークを消すためのサイリスタを相互に逆並
列に接続することが試みられている。 In order to solve this problem, attempts have been made to connect thyristors for extinguishing arcs in antiparallel to each other between the movable electrode and the fixed electrode.
（発明が解決しようとする問題点）
しかし電路開放後もサイリスタは常時接続され
ているのでサイリスターには漏電電流が流れ、サ
イリスターが劣化し、ついには絶縁不良によりサ
イリスターの破壊を招く。また電路の開放状態に
あつても負荷の側で感電事故を起こす恐れが生じ
る等の問題点があつた。(Problem to be Solved by the Invention) However, since the thyristor is always connected even after the electrical circuit is opened, leakage current flows through the thyristor, deteriorating the thyristor, and eventually causing breakdown of the thyristor due to poor insulation. Further, even when the electric circuit is open, there is a risk of electric shock on the load side.
この発明は上記従来の問題点を除く為のもの
で、上記固定電極と可動電極との間にアークが生
じ始めた時にはこれを直ちに素早く消し、その後
は固定電極と可動電極との間を完全に離反させよ
うとするものである。 This invention is intended to eliminate the above-mentioned conventional problems.When an arc starts to occur between the fixed electrode and the movable electrode, it is quickly extinguished, and after that, the gap between the fixed electrode and the movable electrode is completely removed. It is an attempt to alienate them.
（問題点を解決するための手段）
本願発明の高圧負荷開閉器は、固定電極と、可
動電極と、可動電極の投入状態及び可動電極が固
定電極から離反する過程の初期の間において可動
電極に接触する位置に配置されている補助電極
と、上記固定電極と補助電極との間に相互に逆並
列に接続されているサイリスタと、上記投入状態
の可動電極を経由して構成される主回路に装着さ
れていて出力端は上記サイリスタを作動させる為
の上記サイリスタのゲートに連らなる変流器とを
備えたものである。(Means for Solving the Problems) The high voltage load switch of the present invention has a fixed electrode, a movable electrode, a fixed electrode, a movable electrode, a closed state of the movable electrode, and an initial stage of the process of separating the movable electrode from the fixed electrode. A main circuit configured through an auxiliary electrode placed in a contact position, a thyristor connected in antiparallel to each other between the fixed electrode and the auxiliary electrode, and the movable electrode in the closed state. The output end of the thyristor is equipped with a current transformer connected to the gate of the thyristor for operating the thyristor.
（作用）
開閉器における固定電極と可動電極とが離反し
かけてそこにアークが生じ始めた時、そのアーク
電圧によつて予め変流器の出力端からサイリスタ
のゲートにトリガー用の信号が加えられていたサ
イリスタが極めて早く導通させられる。その結
果、上記固定電極と可動電極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 electrode in the switch begin to separate and an arc begins to occur there, a trigger signal is applied in advance from the output end of the current transformer to the gate of the thyristor due to the arc voltage. The thyristor that was in use is made conductive very quickly. As a result, there is no voltage between the fixed electrode and the movable electrode, and arc generation stops.
（実施例）
以下本願の実施例の説明に必要な技術が示され
ている第１図について説明する。(Example) Hereinafter, FIG. 1, which shows the technology necessary for explaining the example of the present application, will be explained.
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３ａ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。次
に９，１０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
してある。９ａ，１０ａ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。変
流器１１によつて検出した信号はパルス発生器１
２によりパルス信号に変換して上記サイリスタ
９，１０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つてい
る。なお、上記においてパルス発生器１２は充電
式バツテリまたは別電源、例えば電源を降圧して
AC100Vで駆動させるようにしてもよい。 In FIG. 1, 1 is a single-phase to three-phase AC power source, 2 is a load, and 3 is a high-voltage load switch interposed between the power source and the load. In this figure, 3a is a sealed case made of metal, etc., 4 is a power supply side terminal, 5 is a load side terminal, 6 is an opening/closing part provided in the case, and as is well known, a fixed electrode (fixed contact) 7 and its contact/disconnection are shown. It consists of a movable electrode (movable contact) 8. Next, 9 and 10 are high voltage and large current thyristors.
As shown, they are connected in antiparallel, and they are connected in parallel between the fixed electrode 7 and the movable electrode 8. 9a and 10a are trigger terminals (gates)
shows. 11 is a current transformer (CT) attached to the electric line 5a
The current in the electric path is detected and an electric signal is generated toward the pulse generator 12. The signal detected by the current transformer 11 is sent to the pulse generator 1
2, it is converted into a pulse signal and applied to the gates of the thyristors 9 and 10, and when a current is flowing between the two electrodes, the signal is constantly given to the gates. . In addition, in the above, the pulse generator 12 is powered by a rechargeable battery or a separate power supply, for example, by stepping down the power supply.
It may be driven with AC100V.
上記構成のものにあつては、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１からの交流電力はその開閉部
６を通つて負荷２に供給される（第４図のニ図の
波形参照）。 In the case of the above configuration, when the fixed electrode 7 and the movable electrode 8 are connected in the opening/closing section 6, AC power from the AC power source 1 is supplied to the load 2 through the opening/closing section 6. (See the waveform in Figure 4, Figure 2).
次に開閉部６を開放する時の動作を説明する。
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１
０は、固定電極７と可動電極８との間のその時の
電気的な極性に応じて、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つて導通す
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）。従つて端子４，
５の間においてはその導通した側のサイリスタに
よつて通電が行われ、固定電極７と可動電極８と
の間は無電圧となつて上記アークが消滅する。や
がて電源１の位相が0°又は180°となつて端子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く可動電極８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１０がオフとなる事によつて端子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。尚上記サイリスタ９，１０には長
くても半波しか電流が流れない為、電流定格（容
量）の小さなもの（例えば30A・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
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。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。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）とともになくな
り、電流は両電極間にのみ流れて通常の電路とな
る（第４図ヘ図の波形参照）。 Next, the operation when opening/closing section 6 will be explained.
When the movable electrode 8 is moved manually and begins to separate from the fixed electrode 7, an arc 40 is created between them.
begins to occur. During this time, a trigger signal is sent from the current transformer 11 and the pulse generator 12 to the trigger terminals 9a and 10a of the thyristors 9 and 10, as shown in Fig. 4 (E).
I keep giving ig. Then thyristors 9 and 1
0, depending on the electrical polarity at that time between the fixed electrode 7 and the movable electrode 8, one of them is electrically connected by the arc voltage caused by the generation of the arc 40 (the arc voltage is determined by the arc voltage after the arc occurs). , the minimum operating voltage of the thyristor is quickly reached). Therefore, terminal 4,
5 is energized by the thyristor on the conducting side, and there is no voltage between the fixed electrode 7 and the movable electrode 8, and the arc is extinguished. Eventually, the phase of power supply 1 becomes 0° or 180°, and terminal 4,
5 becomes 0 volts, the conductive thyristor 9 or 10 is turned off. Until the initial arc is extinguished and the thyristor is turned off as described above, as is well known, the movable electrode 8 is moved to the fixed electrode 7.
Since the thyristor 9 or 10 is turned off, the terminals 4 and 5 are
During this period, the electrical power is completely cut off, and the power supply to the load 2 is cut off. In addition, since only a half-wave current flows through the thyristors 9 and 10 above, it is recommended that the thyristors have a small current rating (capacity) (e.g. 30A, instantaneous current flow).
(possible up to about 600A) is sufficient. For waveforms during operation, refer to Figure 4 (E).In addition, in the opposite case, when the circuit is closed from an open state, that is, when the circuit is closed from an 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. Then, this current is immediately detected by the current transformer 11, and the trigger signal is given to the gates of the thyristors 9 and 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. The arc voltage disappears with the passage of time (as the movable contact approaches the fixed contact), and the current flows only between the two electrodes, forming a normal electrical path (see the waveforms in FIG. 4).
次に第２図は本願の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はブツシングで、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が取付けてある。尚サ
イリスタ９ｆと１０ｆは紙面と垂直な方向に並設
され、かつ、逆並列接続された状態で両電極７
ｆ，８ｆ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はアノード、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は固
定電極７ｆに可動電極８ｆを投入した状態におい
て構成される主回路５afに流れる電流を検出する
為に装着された変流器（CT）であり、この検出
した信号を変流器（CT）の出力端から図示外の
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連ね
てあり、装着状態は電源のブツシング２１の外周
にブツシングを貫通させる状態に装着してある。
２７は取付片２３に固定した絶縁材製の支持体
で、可動電極８ｆに弾力的に接触する補助接触片
２８が取付けてある。２９は接続片を示す。３０
はチユーリツプ形の固定電極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操作軸で、開閉
用レバー３２が取付けてありレバー３２の矢印方
向への揺動によつて可動電極８ｆが矢印方向に直
線運動するようになつている。尚本例において
は、負荷側の接続端子５ｆとしてチユーリツプ形
のものが用いてあり、コイルスプリング３４によ
つて引き締められている。 Next, FIG. 2 shows an 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 10f are arranged in parallel in a direction perpendicular to the plane of the paper, and connected in antiparallel to both electrodes 7.
It is connected in parallel between f and 8f. In the thyristor 9f, 24 represents an anode, and 25 represents a cathode. Furthermore, the gates (not shown) of both thyristors are connected to receive a trigger signal from a pulse generator. 11f is a current transformer (CT) installed to detect the current flowing in the main circuit 5af configured when the movable electrode 8f is connected to the fixed electrode 7f, and the detected signal is transmitted to the current transformer (CT). ) are connected so as to continuously give a trigger signal to the gate of the thyristor via a pulse generator (not shown) from the output end of the thyristor. It has been done.
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 8f is attached. 29 indicates a connecting piece. 30
is a tightening coil spring disposed around the tube-shaped fixed electrode 7f. Reference numeral 31 denotes an opening/closing operating shaft connected to an operating handle (not shown), on which 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. It's summery. In this example, a tulip-shaped connection terminal 5f is used on the load side, and is tightened by a coil spring 34.
上記構成のものにあつては、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５
af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。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７ｆ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。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を介して固定電極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
して接続端子４ｆ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１０ｆ）、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。やがて電源の位相が0°又は180°となる
とサイリスタ９ｆ（又は１０ｆ）はオフとなり、
接続端子４ｆ，５ｆ間の通電が遮断される。更に
引き続いて可動電極８ｆ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、その時には既にサイリスタ９ｆ（又は１
０ｆ）がオフとなつている為、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４ｆ，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 case of the above configuration, in the turned-on state as shown in the figure, the current flows through the main circuit 5 of the power supply side terminal 4f, the fixed electrode 7f, the movable electrode 8f, and the load side terminal 5f.
flows to af. 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). 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 7f, an arc is generated between the tip 33 and the fixed electrode 7f. start. The generated arc voltage is applied to the thyristor because the thyristor is still in contact with the fixed electrode 8f via the fixed auxiliary contact piece 28. 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 an arc voltage is generated, the arc current still flows through the main circuit, so the current transformer 11f detects this current and continues to give the trigger signal to the gate. As soon as the voltage reaches the minimum operating voltage of the thyristor, the thyristor turns on. Electricity is supplied between the connection terminal 4f and the movable electrode 8f through a path passing through the attachment piece 23, the thyristor 9f (or 10f), the connection piece 29, and the auxiliary contact piece 28. As a result, the fixed electrode 7f and the movable electrode 8f
There is no voltage between the tip 33 and the arc disappears. Eventually, when the phase of the power supply reaches 0° or 180°, thyristor 9f (or 10f) turns off.
The current flow between the connection terminals 4f and 5f is cut off. Further, as the movable electrode 8f continues to move to the right, its tip 33 will eventually separate from the auxiliary contact piece 28, but by that time the thyristor 9f (or 1
0f) is off, even if the tip 33 separates from the auxiliary contact piece 28, no arc will occur there. When the tip 33 reaches the position shown by the imaginary line in this manner, the connection terminals 4f and 5f are completely electrically and mechanically 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２
８に接触する。この場合、サイリスタはオフとな
つている為、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
おいて先行放電のアークが発生する。このアーク
の発生によつて主回路５af（両接点）には電流が
流れ、この電流は変流器１１によつて検出され、
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７ｆに完全に接触すると極間電圧が０とな
り、サイリスタに流れる電流がその保持電流以下
となつ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７
ｆ、可動電極８ｆ、負荷側端子５ｆ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 moves to the auxiliary contact piece 2.
Contact 8. In this case, since the thyristor is off, no phenomenon occurs. Eventually, when the tip 33 comes very close to the fixed electrode 7f, an arc of advance discharge occurs between the two. Due to the occurrence of this arc, a current flows through the main circuit 5af (both contacts), and this current is detected by the current transformer 11.
The detected signal is continuously applied 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. When the movable electrode 8f moves further to the left and the tip 33 comes into complete contact with the fixed electrode 7f, the voltage between the electrodes becomes 0, the current flowing through the thyristor becomes less than its holding current, and the thyristor turns off. In this state, the current flows between the power supply side terminal 4f and the fixed electrode 7.
f, the movable electrode 8f, and the main circuit of the load side terminal 5f.
なお、機能上前図のものと同一又は均等構成と
考えられる部分には、前図と同一の符号にアルフ
アベツトのｆを付して重複する説明を省略した。
（また次図のものにおいても、同様の考えでアル
フアベツトの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２８ｅからなるジスコン
部の異なつ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つて
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
るようになつている。 It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alphanumeric letter "f", and redundant explanations are omitted.
(Also, in the following figure, the letter e is given with the same idea, and the redundant explanation is omitted.) Next, Fig. 3 shows the fixed contact 7e, the movable contact 8e, and the fixed auxiliary contact piece. This figure shows another example of a discontinuity unit made of 28e, in which the movable electrode in Fig. 2 is shaped like a rod, whereas the movable contact in Fig. 3 is shaped like a blade. There is a difference. In other words, when the movable contact 8e moves from the state shown in Fig. A to open the electric circuit, it separates from the fixed contact 7e as shown in Fig. B, then temporarily contacts only the fixed contact piece 28e, and then moves When the contact moves, it separates from the contact piece as shown in Figure C, and the thyristor 9e is completely disconnected from the electrical circuit.
（発明の効果）
以上のように本発明にあつては、高圧負荷開閉
器３ｆにおける可動電極８ｆと固定電極７ｆとを
電源から負荷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
ｆ，１０ｆ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８ｆ及び固定電極７ｆ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 8f and the fixed electrode 7f of the high voltage load switch 3f are separated in order to interrupt the electric path from the power supply to the load, the distance between these two electrodes is Even if an arc is about to occur, the thyristor 9 connected in advance between the two electrodes
f and 10f are made conductive, thereby extinguishing the arc between the two electrodes and preventing the movable electrode 8f and the fixed electrode 7f from being worn out.
また上記両電極の開離時、電源電圧の極性が正
負のいずれであつても上記のごとく逆並列のサイ
リスタ９ｆ，１０ｆが両電極に対し並列に接続さ
れているため、両電極間の開離動作とも相まつて
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 9f and 10f are connected in parallel to both electrodes as described above. Coupled with operation, 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８ｆと固定
電極７ｆを通る電流があるときには、高い信頼性
を有する変流器１１ｆによつて確実に電流を検出
することができ、上記のサイリスタ９ｆ，１０ｆ
にトリガー用の信号が加わるようにしてあるた
め、可動と固定の両電極間７ｆ，８ｆでアーク電
流が生ずると直ちに極めて早くサイリスタ９ｆ，
１０ｆが導通するから、アークの発生時に対して
サイリスタ９ｆ，１０ｆの導通による消弧作用の
逐行がぴつたりと電気的に同期して、消弧の確実
性を高め、極めて高い信頼度のもとに上記の効果
が得られる。 Moreover, in the above case, when there is a current passing through the movable electrode 8f and the fixed electrode 7f, the current can be reliably detected by the highly reliable current transformer 11f, and the thyristors 9f and 10f
Since a trigger signal is applied to the thyristor 9f, as soon as an arc current is generated between the movable and fixed electrodes 7f, 8f, the thyristor 9f,
Since 10f is conductive, the arc extinguishing action due to the conduction of thyristors 9f and 10f is electrically synchronized exactly when an arc occurs, increasing the certainty of arc extinguishing and achieving extremely high reliability. The above effects can be obtained.
その上、上記初期アークの消弧は固定電極７ｆ
から可動電極８ｆを上記電路の遮断の為に離反さ
せる過程において行えるものであり、消弧目的達
成後は上記固定電極７ｆから可動電極８ｆを上記
電路の遮断の為に離反させる行為を続行させるこ
とにより、可動電極８ｆを固定電極７ｆから遠く
離すと共にサイリスタ９ｆ，１０ｆの一端となる
補助接触片２８を開放でき、これによりサイリス
タ９ｆ，１０ｆの一端は完全に切離される。従つ
てサイリスタ９ｆ，１０ｆを利用して初期アーク
の消弧ができるものであつても従来品のようなサ
イリスタ９ｆ，１０ｆの配設に基づく感電事故は
防止できる効果がある。 Moreover, the extinguishing of the initial arc is performed by the fixed electrode 7f.
This can be done in the process of separating the movable electrode 8f from the fixed electrode 7f in order to interrupt the electric path, and after achieving the arc extinguishing purpose, continue the act of separating the movable electrode 8f from the fixed electrode 7f in order to interrupt the electric path. As a result, the movable electrode 8f can be moved far away from the fixed electrode 7f, and the auxiliary contact piece 28, which becomes one end of the thyristors 9f, 10f, can be opened, thereby completely separating one end of the thyristors 9f, 10f. Therefore, even if the initial arc can be extinguished using the thyristors 9f and 10f, electric shock accidents caused by the arrangement of the thyristors 9f and 10f as in conventional products can be prevented.
第１図は電源と負荷との間の接続回路のブロツ
ク図、第２図は高圧負荷開閉器の縦断面図、第３
図のイ，ロ，ハの図はジスコン部の異なる例を示
す動作説明図、第４図のニ，ホ，ヘの図は夫々波
形図。
１……電源、２……負荷、５af……主回路、７
ｆ……固定電極、８ｆ……可動電極、９ｆ，１０
ｆ……サイリスタ、１１ｆ……変流器、２８……
補助電極。
Figure 1 is a block diagram of the connection circuit between the power supply and the load, Figure 2 is a longitudinal cross-sectional view of the high voltage load switch, and Figure 3 is a block diagram of the connection circuit between the power supply and the load.
Figures A, B, and C in the figure are operation explanatory diagrams showing different examples of the disc control unit, and Figures D, H, and F in FIG. 4 are waveform diagrams, respectively. 1...Power supply, 2...Load, 5af...Main circuit, 7
f...Fixed electrode, 8f...Movable electrode, 9f, 10
f...Thyristor, 11f...Current transformer, 28...
Auxiliary electrode.
Claims (1)
態及び可動電極が固定電極から離反する過程の初
期の間において可動電極に接触する位置に配置さ
れている補助電極と、上記固定電極と補助電極と
の間に相互に逆並列に接続されているサイリスタ
と、上記投入状態の可動電極を経由して構成され
る主回路に装着されていて出力端は上記サイリス
タを作動させる為の上記サイリスタのゲートに連
らなる変流器とを備えたことを特徴とする高圧負
荷開閉器。1. A fixed electrode, a movable electrode, an auxiliary electrode that is placed in a position that contacts the movable electrode during the closed state of the movable electrode and the initial stage of the process of separating the movable electrode from the fixed electrode, and the fixed electrode and the auxiliary electrode. The thyristors are connected in antiparallel to each other, and the movable electrode in the closed state is connected to the main circuit, and the output terminal is connected to the gate of the thyristor for operating the thyristor. A high voltage load switch characterized by being equipped with a current transformer connected to.
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 JPS61260516A (en) | 1986-11-18 |
| JPH0574892B2 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930011029A (en) * | 1991-11-11 | 1993-06-23 | 이충구 | Arc-discharge erasing circuit of contact |
| JP3190563B2 (en) * | 1996-02-27 | 2001-07-23 | 三菱電機株式会社 | Switchgear |
| ES2358686T3 (en) * | 2007-02-02 | 2011-05-12 | Abb Research Ltd. | SWITCHING DEVICE, USE OF THE SAME AND SWITCHING PROCEDURE. |
| EP2523203B1 (en) | 2011-05-10 | 2019-07-03 | ABB Schweiz AG | Switching device and related switchgear |
-
1985
- 1985-05-15 JP JP10324285A patent/JPS61260516A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61260516A (en) | 1986-11-18 |
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