JPH0117064Y2 - - Google Patents
Info
- Publication number
- JPH0117064Y2 JPH0117064Y2 JP1979142623U JP14262379U JPH0117064Y2 JP H0117064 Y2 JPH0117064 Y2 JP H0117064Y2 JP 1979142623 U JP1979142623 U JP 1979142623U JP 14262379 U JP14262379 U JP 14262379U JP H0117064 Y2 JPH0117064 Y2 JP H0117064Y2
- Authority
- JP
- Japan
- Prior art keywords
- breaker
- current
- circuit
- shield
- vacuum
- 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
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案はしや断器に転流回路を附加した直流し
や断回路に関するものである。[Detailed Description of the Invention] The present invention relates to a direct current or disconnection circuit in which a commutation circuit is added to a cutter or disconnector.
第１図に転流回路を用いた直流しや断回路の従
来の基本的構成を示す。 FIG. 1 shows the basic configuration of a conventional direct current or disconnection circuit using a commutation circuit.
第１図に於いて、１はしや断器、２は転流用コ
ンデンサ、３は転流用スイツチである。第１図に
おけるしや断動作は次のように行なわれる。先ず
しや断器１を閉じた状態で通電電流i1を流す。こ
の時転流用コンデンサ２は、図示しない充電装置
によつて図示の極性、すなわちスイツチ３を閉じ
た時発生する転流用コンデンサ２からの放電電流
i2がしや断器１において通電電流i1と逆向きに流
れるような極性で充電されている。この状態にお
いて、しや断器１にしや断指令を与え、しや断器
１を開極すると共にスイツチ３を閉じると、放電
電流i2が通電電流i1としや断器１において逆方向
に重量されるので、i2の最大値をi1より大きく設
定しておけば、しや断器１を流れる電流に零点を
作ることができ、この電流零点によつてしや断器
１をしや断することができる。この場合、しや断
器１は、電流零となる前に開離され、電流零にな
るまでは、アークで接続されていることになる。 In FIG. 1, 1 is a wire cutter, 2 is a commutation capacitor, and 3 is a commutation switch. The shear cutting operation in FIG. 1 is performed as follows. First, an energizing current i1 is applied with the disconnector 1 closed. At this time, the commutating capacitor 2 is connected to the polarity shown in the figure by a charging device (not shown), that is, the discharge current from the commutating capacitor 2 that occurs when the switch 3 is closed.
The current i2 is charged in the disconnector 1 with a polarity such that the current flows in the opposite direction to the current i1 . In this state, when a command is given to the sheath breaker 1 to open the sheath breaker 1 and close the switch 3, the discharge current i 2 is reversed to the energizing current i 1 in the sheath breaker 1. Therefore, by setting the maximum value of i 2 to be larger than i 1 , it is possible to create a zero point in the current flowing through the shield breaker 1, and this current zero point causes the shield breaker 1 to and can be terminated. In this case, the breaker 1 is opened before the current becomes zero, and is connected by an arc until the current becomes zero.
本考案は、しや断器の開極時に発生するアーク
をおさえて、しや断器のしや断寿命を増し、耐電
圧特性を改善することを目的とするものである。 The purpose of the present invention is to suppress the arc that occurs when the shield circuit breaker opens, thereby increasing the shield life of the circuit breaker and improving its withstand voltage characteristics.
本考案の直流しや断回路の一実施例を第２図に
示す、第２図において、１１は真空しや断器、２
は転流用コンデンサ、１３は転流用サイリスタス
イツチ、１４はダイオード、１５は負荷コイル、
１６は電源用スイツチ、１７は直流電源である。 An embodiment of the DC current and disconnection circuit of the present invention is shown in FIG. 2. In FIG.
is a commutation capacitor, 13 is a commutation thyristor switch, 14 is a diode, 15 is a load coil,
16 is a power switch, and 17 is a DC power source.
第２図に示すように、真空しや断器１１とダイ
オード１４は直列接続され、また転流用コンデン
サ２とサイリスタスイツチ１３も直列接続され、
これら２つの直列回路が、並列に接続されてい
る。 As shown in FIG. 2, the vacuum shield breaker 11 and the diode 14 are connected in series, and the commutating capacitor 2 and the thyristor switch 13 are also connected in series.
These two series circuits are connected in parallel.
第２図におけるしや断動作の一例を第３図に示
すしや断器に流れる電流ｉの時間ｔによる変化に
従つて説明する。先ず電源スイツチ１６を閉じた
状態で、直流電源１７が負荷コイル１５の電流i1
を立ち上げる。電流i1がi0に達した時、直流電源
１７を逆変換運転し、負荷コイル１５の電流を、
真空しや断器１１とダイオード１４の直列回路側
へ転流し、電源スイツチ１６を流れる電流を減少
させてこれをしや断する。この間の動作により、
第３図に示すように時点t0からt1の間で、真空し
や断器１１の電流ｉは、負荷コイル１５を流れる
電流値i0に等しくなる。次に、時点t2においてサ
イリスタスイツチ１３を作動すれば、転流用コン
デンサ２からの放電電流i2が、真空しや断器１１
を流れる循環電流i0と逆向きに流れ込む。 An example of the shingle breaker operation in FIG. 2 will be explained in accordance with the change in the current i flowing through the shingle breaker shown in FIG. 3 over time t. First, with the power switch 16 closed, the DC power supply 17 supplies the current i 1 of the load coil 15.
launch. When the current i 1 reaches i 0 , the DC power supply 17 is operated in reverse, and the current of the load coil 15 is changed to
The current is diverted to the series circuit of the vacuum shield breaker 11 and the diode 14, reducing the current flowing through the power switch 16 and cutting it off. Due to the operation during this time,
As shown in FIG. 3, between time t 0 and t 1 , the current i in the vacuum sheath breaker 11 becomes equal to the current value i 0 flowing through the load coil 15 . Next, if the thyristor switch 13 is activated at time t 2 , the discharge current i 2 from the commutating capacitor 2 will be transferred to the vacuum
The circulating current flowing through i 0 flows in the opposite direction.
このように逆向きに放電電流i2が流れ込むと
き、i2の最大値をi0より大きくなるように転流用
コンデンサ１２の容量を設定しておけば、真空し
や断器１１の電流は時点t3で零になる。ダイオー
ド１４は逆方向電流を阻止するので、真空しや断
器１１における電流は、時点t3からt4の間は零と
なる。これが本考案における直流しや断回路の大
きな特徴である。 When the discharge current i 2 flows in the opposite direction in this way, if the capacity of the commutation capacitor 12 is set so that the maximum value of i 2 is larger than i 0 , the current in the vacuum shield breaker 11 will be It becomes zero at t 3 . Since the diode 14 blocks reverse current, the current in the vacuum shield breaker 11 is zero between times t 3 and t 4 . This is a major feature of the direct current and disconnection circuit in the present invention.
真空しや断器１１を流れる電流が零となつた時
点t3以後は、転流用コンデンサ２の電流i2は、転
流用コンデンサ２→負荷コイル１５→サイリスタ
スイツチ１３の経路で流れ、第３図の時点t4にお
いて、ダイオード１４に加わる電圧は再び順方向
となり、通電可能となる。しかし、時点t3からt4
の間に真空しや断器１１を開極し、真空バルブの
絶縁を充分に保持しておけば、時点t4において、
ダイオード１４および真空しや断器１１の直列回
路を電流は流れない。また、時点t3より以前に真
空しや断器１１を開極し、真空バルブ内でアーク
が発生する場合でも、時点t3からt4の間の電流零
の領域で確実にしや断器のしや断されることにな
る。このことは転流回路を用いるしや断器のしや
断現象をより確実なものとすることになり、本考
案の特徴の一つとなるものである。 After time t 3 when the current flowing through the vacuum shield breaker 11 becomes zero, the current i 2 in the commutation capacitor 2 flows through the path of the commutation capacitor 2 → load coil 15 → thyristor switch 13, as shown in FIG. At time t4 , the voltage applied to the diode 14 becomes forward again, allowing current to flow. But from time t 3 to t 4
If the vacuum shield and disconnector 11 are opened during this period and the insulation of the vacuum valve is maintained sufficiently, at time t4 ,
No current flows through the series circuit of the diode 14 and the vacuum shield breaker 11. In addition, even if the vacuum circuit breaker 11 is opened before time t 3 and an arc occurs within the vacuum valve, the circuit can be reliably activated in the zero current region between time t 3 and t 4 . You will be cut off. This makes the rupture phenomenon of the breaker using a commutation circuit more reliable, and is one of the features of the present invention.
また第２図の真空しや断器１１の代りに空気し
や断器、ガスしや断器などを用いた場合も同様で
ある。またサイリスタスイツチ１３の代りにトリ
ガーギヤツプ、投入器などが考えられ、動作とし
ては、選択された機器に応じて細部では異なる
が、しや断器としての基本的構成は同じとなる。 Further, the same applies when an air shield or disconnector, a gas shield or disconnector, etc. is used in place of the vacuum shield or disconnector 11 shown in FIG. Further, instead of the thyristor switch 13, a trigger gap, a closing device, etc. can be used, and although the details of the operation differ depending on the selected device, the basic configuration as a breaker is the same.
このようにして真空しや断器１１、ダイオード
１４、および転流回路を用いてしや断回路を構成
すれば、真空バルブの接点は、アークを発するこ
となく、もしくは少ないアークの通電だけで、真
空しや断器の電流をしや断できる。 By constructing a vacuum circuit breaker using the vacuum circuit breaker 11, diode 14, and commutation circuit in this way, the contacts of the vacuum valve can be operated without arcing or with only a small amount of arc energization. It can cut off the current of the vacuum cutter and the cutter.
真空しや断器の真空バルブは、電気的な多頻度
しや断をする場合、アーク時間、アーク電流値な
どに大きく依存し、その寿命が決まつている。ま
た、しや断器の寿命は、機械的寿命よりも電気的
寿命の方がはるかに短かいのが一般的である。ア
ークなしでしや断できることになれば、真空バル
ブのしや断寿命は主に機械的寿命を基にして決定
されることになり、大きく寿命の延長が実現され
る。また、ある期間電流零の領域を有すること
は、しや断器の絶縁回復が一層確実となり、転流
回路を用いるしや断器としてのしや断現象を一層
確実なものとすることが可能となる。 The lifespan of a vacuum valve in a vacuum shield breaker depends largely on the arc time, arc current value, etc. when electrical circuits are disconnected frequently. In addition, the electrical life of a shingle breaker is generally much shorter than its mechanical life. If it were possible to cut out the vacuum valve without an arc, the break life of the vacuum valve would be determined mainly based on the mechanical life, and the life would be greatly extended. In addition, having a zero current region for a certain period of time makes the insulation recovery of the shingle breaker more reliable, and it is possible to further ensure the shingle failure phenomenon as a shingle breaker using a commutation circuit. becomes.
以上説明したように本考案によれば、しや断器
に転流回路を附加した直流しや断回路において、
しや断器に直列にダイオードを挿入することによ
り、確実なしや断を可能とすると共に、しや断器
の寿命を大巾に延長することができる。なお、本
考案は通常の直流電流のしや断の他、交流回路に
おける半波電流のしや断にも適用することができ
る。 As explained above, according to the present invention, in a direct current or disconnection circuit in which a commutation circuit is added to a disconnector,
By inserting a diode in series with the shield breaker, it is possible to ensure reliable disconnection and disconnection, and the life of the shield breaker can be greatly extended. Note that the present invention can be applied not only to normal DC current flow but also to half-wave current flow in AC circuits.
第１図は、従来の直流しや断回路の基本的構成
を示す図、第２図は本考案の一実施例を示す回路
図、第３図はその動作説明図である。
１……しや断器、２……転流用コンデンサ、３
……転流用スイツチ、１１……真空しや断器、１
３……サイリスタスイツチ、１４……ダイオー
ド、１５……負荷コイル、１６……電源用スイツ
チ、１７……直流電源。
FIG. 1 is a diagram showing the basic configuration of a conventional direct current or disconnection circuit, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram of its operation. 1...Shipping breaker, 2...Commuting capacitor, 3
... Commutation switch, 11 ... Vacuum shield disconnector, 1
3...Thyristor switch, 14...Diode, 15...Load coil, 16...Power switch, 17...DC power supply.
Claims (1)
方向に直列に接続されたダイオードからなる主回
路と、この主回路と並列に接続され転流コンデン
サおよび転流スイツチの直列体からなる転流回路
とを備え、前記しや断器の開極時に前記転流スイ
ツチの閉路により前記主回路に流れようとする逆
向きの電流を前記ダイオードにより阻止するよう
にしたことを特徴とする直流しや断回路。 A main circuit consisting of a breaker and diodes connected in series in the direction in which the current flows when the breaker is closed, and a series body of a commutating capacitor and a commutating switch connected in parallel with this main circuit. and a commutation circuit consisting of the circuit breaker, and the diode blocks a reverse current that is about to flow into the main circuit by closing the commutation switch when the shield breaker is opened. direct current or disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979142623U JPH0117064Y2 (en) | 1979-10-17 | 1979-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979142623U JPH0117064Y2 (en) | 1979-10-17 | 1979-10-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5661937U JPS5661937U (en) | 1981-05-26 |
| JPH0117064Y2 true JPH0117064Y2 (en) | 1989-05-18 |
Family
ID=29373895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1979142623U Expired JPH0117064Y2 (en) | 1979-10-17 | 1979-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0117064Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5170438A (en) * | 1974-12-17 | 1976-06-18 | Mitsubishi Electric Corp | CHOKURYUSHADANSOCHI |
-
1979
- 1979-10-17 JP JP1979142623U patent/JPH0117064Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5170438A (en) * | 1974-12-17 | 1976-06-18 | Mitsubishi Electric Corp | CHOKURYUSHADANSOCHI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5661937U (en) | 1981-05-26 |
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