JPH0265022A - Puffer-formed sf6 gas-blast circuit-breaker with delay puffuer - Google Patents
Puffer-formed sf6 gas-blast circuit-breaker with delay puffuerInfo
- Publication number
- JPH0265022A JPH0265022A JP21373888A JP21373888A JPH0265022A JP H0265022 A JPH0265022 A JP H0265022A JP 21373888 A JP21373888 A JP 21373888A JP 21373888 A JP21373888 A JP 21373888A JP H0265022 A JPH0265022 A JP H0265022A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- puffer
- blowoff
- cylinder
- buffer
- 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.)
- Pending
Links
- 239000000872 buffer Substances 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 238000007664 blowing Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明はバッファ形SF、ガス遮断器の遮断性能の向上
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improving the breaking performance of buffer type SFs and gas circuit breakers.
(従来技術とその問題点)
GCBと略称されているバッファ形SF、ガス遮断器は
、第1図(a)の投入状態を示す断面図のように固定接
触子(1)、可動接触子(2)、可動接触子(1)と一
体となって動く底部にガス吹出し孔(3a)を備えたバ
ッファシリンダ(3)、シリンダ(3)と同軸の固定ピ
ストン(4)、可動接触子(2)と同軸の消弧ノズル(
5)などからなり、次のように動作する。(Prior art and its problems) A buffer type SF or gas circuit breaker, abbreviated as GCB, has a fixed contact (1), a movable contact ( 2), a buffer cylinder (3) with a gas blowing hole (3a) at the bottom that moves together with the movable contact (1), a fixed piston (4) coaxial with the cylinder (3), and a movable contact (2). ) and coaxial arc extinguishing nozzle (
5), etc., and operates as follows.
遮断動作指令が与えられると、可動接触子(2)は第1
図(b)に示す矢印方向に移動して固定接触子(1)と
の開離を開始する。一方この開極動作過程における固定
ピストン(4)に対するバッファシリンダ(3)の移動
によりシリンダ(3)内のS F bガスの圧縮が行わ
れ、これによって圧力の上昇したSF、ガスはガス吹出
し孔(3a)から消弧ノズル(5)内に吹出される。こ
のため固定接触子(1)と可動接触子(2)間に生じた
アーク(6)は象、速に消弧されて遮断が行われる。When a breaking operation command is given, the movable contact (2) moves to the first
It moves in the direction of the arrow shown in Figure (b) and starts separating from the fixed contact (1). On the other hand, the movement of the buffer cylinder (3) with respect to the fixed piston (4) during this opening operation process compresses the SFb gas in the cylinder (3), and the SF and gas with increased pressure are thereby discharged to the gas blowout hole. (3a) and is blown into the arc extinguishing nozzle (5). Therefore, the arc (6) generated between the fixed contact (1) and the movable contact (2) is quickly extinguished and interrupted.
しかしこの従来の遮断器では例えば電流遮断後において
多重雷による再雷撃を受けたとき再発弧を生じて遮断不
能となることがあり、系統保護の万全を期し得ない。However, with this conventional circuit breaker, for example, if the circuit breaker receives a second lightning strike due to multiple lightning strikes after cutting off the current, it may re-ignite and become unable to shut off the circuit, so it cannot ensure complete protection of the system.
(発明の目的)
本発明は電流遮断後の絶縁回復特性の向上を図り、上記
多重雷などによる再発弧時の遮断能力を保持できるよう
にしたものである。(Objective of the Invention) The present invention aims to improve insulation recovery characteristics after current interruption, and maintains interruption ability in the event of re-ignition caused by multiple lightning strikes or the like.
(問題点を解決するための本発明の手段)従来のバッフ
ァ形SF6ガス遮断器においてはバッファシリンダ(3
)は可動接触子(1)の移動開始と同時に移動を開始し
、停止と同時に停止する。従ってバッファシリンダ(3
)内のガス圧力は第2図に示すガス圧力などと時間との
関係図のように、開離開始点(開極点付近)から上昇し
て吹出し孔(3a)から消弧ノズル(5)内へガスの吹
出しを開始する。(Means of the present invention for solving the problem) In the conventional buffer type SF6 gas circuit breaker, the buffer cylinder (3
) starts moving at the same time as the movable contact (1) starts moving, and stops at the same time it stops. Therefore, the buffer cylinder (3
), the gas pressure rises from the opening start point (near the opening point) and flows into the arc extinguishing nozzle (5) through the blowout hole (3a), as shown in the relationship between gas pressure and time shown in Figure 2. Start blowing out gas.
このガスの吹出しはシリンダ内のガス圧力上昇に伴って
大きくなり、中間点付近で最大となる。その後、圧力は
象、激に低下して最大開離以前において零になり、ガス
の吹付けも最大開離以前においてほぼ終了する。This gas blowout increases as the gas pressure within the cylinder increases and reaches its maximum near the midpoint. Thereafter, the pressure drops dramatically and reaches zero before the maximum opening, and the gas blowing almost ends before the maximum opening.
従って遮断直後において系統の過渡回復電圧より高い電
圧値をもつ例えば多重雷による過電圧が侵入した場合に
は、絶縁の回復不足による極間のフラッシュオーバを防
ぎ得すに再発弧の状態になり、第2図中に示す電流波形
のように遮断不能になる。なお、無負荷遮断時において
はアークの発生がなくこれによる消弧ノズル(5)内で
の圧力上昇がない。このため第2図中に点線によって示
すように、バッファシリンダ(3)内におけるガス圧力
の上昇は電流遮断時のそれに比べて遥かに少なくガスの
吹付は力も弱い。Therefore, if an overvoltage with a voltage value higher than the transient recovery voltage of the grid, for example due to multiple lightning strikes, enters immediately after the shutdown, flashover between the poles due to insufficient recovery of the insulation can be prevented, but a re-ignition state will occur, and the 2 It becomes impossible to shut off as shown in the current waveform shown in Figure 2. Note that during no-load interruption, no arc is generated and there is no pressure rise within the arc-extinguishing nozzle (5). Therefore, as shown by the dotted line in FIG. 2, the increase in gas pressure inside the buffer cylinder (3) is much smaller than that when the current is cut off, and the force of the gas blowing is also weak.
本発明は以上から固定接触子と可動接触子の最大開離点
以後においても所要時間引続いて消弧ノズル内にSF、
ガスを吹出すことができれば、多重雷による再発弧を阻
止するに十分な絶縁の回復を図ることができ、これによ
ってバッファ形SF6ガス遮断器の性能の向上を図りう
ることを着想してなされたもので、次に実施例により本
発明を具体的に説明する。From the above, the present invention allows SF to continue to flow in the arc extinguishing nozzle for the required time even after the maximum separation point between the fixed contact and the movable contact.
This idea was created based on the idea that if gas could be blown out, sufficient insulation could be restored to prevent re-ignition caused by multiple lightning strikes, thereby improving the performance of buffer type SF6 gas circuit breakers. Next, the present invention will be specifically explained with reference to Examples.
(実施例)
第3図は本発明の一実施例の説明図であって、従来のガ
ス遮断器に次の機構を設けものである。(Embodiment) FIG. 3 is an explanatory diagram of an embodiment of the present invention, in which a conventional gas circuit breaker is provided with the following mechanism.
即ち第3図(a)に示す投入状態の断面図のように、バ
ッファシリンダ(3)と固定ピストン(4)とからなる
主バツフア部Aの外周に、底部付近にバッファシリンダ
(3)内との連通孔(7a)を備えた補助シリンダ(7
)と、内部にコイル状ばね体(8)を収容した一端開口
の補助ピストン(9)及び上記コイル状ばね体(8)の
一端を押す固定されたピストン動作棹00)とよりなる
遅動バッファ部Bを設けて、次の作用が得られるように
したものである。That is, as shown in the cross-sectional view of the closed state shown in FIG. 3(a), there is a hole inside the buffer cylinder (3) near the bottom on the outer periphery of the main buffer part A consisting of the buffer cylinder (3) and the fixed piston (4). An auxiliary cylinder (7) equipped with a communication hole (7a)
), an auxiliary piston (9) with one end open housing a coiled spring body (8) therein, and a fixed piston operating rod 00) that presses one end of the coiled spring body (8). Part B is provided so that the following effects can be obtained.
(作 用)
前記したように遮断動作指令により固定接触子(1)に
対して可動接触子(2)が移動し始めると、主バツフア
部A内のガス圧力は第4図のように上昇する。(Function) As mentioned above, when the movable contact (2) begins to move relative to the fixed contact (1) in response to the interruption operation command, the gas pressure in the main buffer section A increases as shown in Figure 4. .
一方可動接触子(2)の移動と共に、これと一体の補助
バッファシリンダ(7)も固定されたピストン動作棹0
0)の方向に移動する。このためピストン動作棹00)
はコイル状ばね体(8)の一端の押圧を開始し、第3図
(b)の遮断途中の図に示すようにばね体(8)の圧縮
が一定値以上進むと、ばね体(8)を介して押圧力が補
助ピストン(9)に作用する。このため第4図のように
主バツフア部Aによるガスの圧縮開始から成る時間tだ
け遅れて補助バッファシリンダ(7)内のガスの圧縮動
作を開始し、そのガス圧が主バツフアシリンダ(3)内
のガス圧を上廻ると、第3図(C)のようにシリンダ(
3)による消弧ノズル(5)内へのガスの吹出しと共に
補助バッファシリンダ(7)による消弧ノズル(5)へ
のガスの吹出しが開始され、これにより圧力は低下する
。On the other hand, as the movable contactor (2) moves, the auxiliary buffer cylinder (7) integrated with it also moves to the fixed piston operating rod 0.
0) direction. For this reason, the piston movement rod is 00)
starts pressing one end of the coiled spring body (8), and when the compression of the spring body (8) progresses beyond a certain value as shown in the diagram in the middle of the cutoff in FIG. 3(b), the spring body (8) A pressing force acts on the auxiliary piston (9) via. Therefore, as shown in Fig. 4, the compression operation of the gas in the auxiliary buffer cylinder (7) is started after a delay of time t from the start of gas compression by the main buffer section A, and the gas pressure is equal to the main buffer cylinder (3). ), the gas pressure in the cylinder (
3) starts blowing gas into the arc extinguishing nozzle (5), and the auxiliary buffer cylinder (7) starts blowing gas into the arc extinguishing nozzle (5), thereby reducing the pressure.
従ってコイル状ばね体(8)の強さや補助バッファシリ
ンダ(7)の容量などを選定すれば、第4図に示すよう
に固定接触子(1)と可動接触子(2)の最大開離点以
後も引続いて消弧ノズル(5)内へのSF6ガスの吹出
しを行うことができ、これによって遮断直後における極
間の絶縁回復特性を向上できる。このため電流遮断直後
に多重雷による雷撃にもとづき極間にフラッシュオーバ
を発生しても、第4図中の電流によって示されるように
遮断を成功させうる。なお第4図中の斜線部分は本発明
によるガス圧力増強効果骨である。Therefore, if the strength of the coiled spring body (8) and the capacity of the auxiliary buffer cylinder (7) are selected, the maximum separation point between the fixed contact (1) and the movable contact (2) can be determined as shown in Fig. 4. Thereafter, SF6 gas can be continuously blown into the arc extinguishing nozzle (5), thereby improving the insulation recovery characteristics between the electrodes immediately after the interruption. Therefore, even if a flashover occurs between the poles due to a lightning strike caused by multiple lightning immediately after the current is interrupted, the interruption can be successfully accomplished as shown by the current in FIG. Note that the shaded area in FIG. 4 is the gas pressure enhancement effect bone according to the present invention.
なお、無負荷遮断の場合にも第5図中に斜線部分で示す
ように、本発明遅動バッファ部Bによるガス圧力の増強
が行われる。Note that even in the case of no-load cutoff, the gas pressure is increased by the slow acting buffer section B of the present invention, as shown by the hatched area in FIG.
(他の実施例)
以上本発明をシングルフロー形SF6ガス遮断器につい
て説明したが、ダブルフロー形SF、遮断器、即ち第6
図(a)(第3図と同一符号部分は同等部分を示す)に
示すように可動接触子(2)の支持軸内に排気孔(ll
a)を有するガス通路01)を設けて、これにより図中
矢印のように消弧ノズル(5)内へのガス流とガス通路
(11)へのガス流の計2つのガス流を作って、発生ア
ーク(6)の消弧を促進するようにしたものにも、主バ
ツフア部Aの外周に第6図中に示す前記と同様の遅動バ
ッファ部Bを設けることによって適用して、極間の絶縁
回復特性を向上できる。なお第6図(b)は遮断動作中
の状態であるが、その動作については説明を省略する。(Other Embodiments) The present invention has been described above with respect to a single flow type SF6 gas circuit breaker.
As shown in Figure (a) (the same reference numerals as in Figure 3 indicate the same parts), there is an exhaust hole (ll
A gas passage 01) having a) is provided, thereby creating a total of two gas flows, one into the arc extinguishing nozzle (5) and the other into the gas passage (11), as shown by the arrow in the figure. , it can also be applied to a device that promotes extinguishing of the generated arc (6) by providing a slow-acting buffer section B similar to that shown in FIG. 6 on the outer periphery of the main buffer section A. It is possible to improve the insulation recovery characteristics between Although FIG. 6(b) shows a state in which a cutoff operation is in progress, a description of that operation will be omitted.
第1図は従来のシングルフロー・バッファ形SF6ガス
遮断器の説明図、第2図はバッファ形SF、ガス遮断器
の一般的な動作説明図、第3図は本発明の一実施例の説
明図、第4図、第5図はその電流遮断時と無負荷電流遮
断時における動作説明図、第6図はダブルフロー・バッ
ファ形SF。
ガス遮断器における本発明の一実施例図である。
(1)・・・固定接触子、(2)・・・可動接触子、A
・・・主バツフア部、(3)・・・バッファシリンダ、
(3a)・・・ガス吹出し孔、(4)・・・固定された
ピストン、(5)・・・消弧ノズル、(6)・・・発生
アーク、B・・・遅動バッファ部、(7)・・・補助バ
ッファシリンダ、(8)・・・コイル状ばね体、(9)
・・・補助可動ピストン、θ0)・・・固定されたピス
トン動作棹、(IQ・・・ガス通路、(lla)・・・
ガス排出孔。
幣11
始2図
第
■
開Mえ
給
図
■詩史
If1社更
幣6図Fig. 1 is an explanatory diagram of a conventional single flow buffer type SF6 gas circuit breaker, Fig. 2 is an explanatory diagram of the general operation of a buffer type SF gas circuit breaker, and Fig. 3 is an explanatory diagram of an embodiment of the present invention. Figures 4 and 5 are explanatory diagrams of the operation during current cutoff and no-load current cutoff, and Fig. 6 is a double flow buffer type SF. FIG. 1 is a diagram showing an embodiment of the present invention in a gas circuit breaker. (1)...Fixed contact, (2)...Movable contact, A
...Main buffer section, (3)...Buffer cylinder,
(3a)... Gas blow-off hole, (4)... Fixed piston, (5)... Arc extinguishing nozzle, (6)... Generated arc, B... Slow acting buffer part, ( 7)... Auxiliary buffer cylinder, (8)... Coiled spring body, (9)
...Auxiliary movable piston, θ0)...Fixed piston operating rod, (IQ...Gas passage, (lla)...
Gas exhaust hole. Note 11 First 2nd illustration ■ Opening page ■ Poetry history If1 first edition 6th illustration
Claims (1)
開始してその圧力上昇により消弧ノズル内にSF_6ガ
スを吹出すバッファ部を備えたバッファ形SF_6ガス
遮断器において、前記可動接触子の開離と共に動作して
前記バッファ部によるSF_6ガスの圧縮開始から遅れ
てSF_6ガスの圧縮を開始し、前記バッファ部による
SF_6ガスの吹出し終了後も継続して消弧ノズル内へ
SF_6ガスの吹出しを行う遅動バッファ部を設けたこ
とを特徴とする遅動バッファ付バッファSF_6形ガス
遮断器。(1) In a buffer type SF_6 gas circuit breaker equipped with a buffer section that starts compressing SF_6 gas when the movable contact is opened and blows out SF_6 gas into the arc extinguishing nozzle due to the pressure increase, the movable contact It operates together with the opening to start compressing the SF_6 gas with a delay from the start of compression of the SF_6 gas by the buffer part, and continues to blow out the SF_6 gas into the arc extinguishing nozzle even after the buffer part finishes blowing out the SF_6 gas. A buffer SF_6 type gas circuit breaker with a slow acting buffer, characterized by being provided with a slow acting buffer section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21373888A JPH0265022A (en) | 1988-08-30 | 1988-08-30 | Puffer-formed sf6 gas-blast circuit-breaker with delay puffuer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21373888A JPH0265022A (en) | 1988-08-30 | 1988-08-30 | Puffer-formed sf6 gas-blast circuit-breaker with delay puffuer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0265022A true JPH0265022A (en) | 1990-03-05 |
Family
ID=16644192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21373888A Pending JPH0265022A (en) | 1988-08-30 | 1988-08-30 | Puffer-formed sf6 gas-blast circuit-breaker with delay puffuer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0265022A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5933410A (en) * | 1996-06-26 | 1999-08-03 | Mitsubishi Denki Kabushiki Kaisha | Optical disc and optical disc driving apparatus |
-
1988
- 1988-08-30 JP JP21373888A patent/JPH0265022A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5933410A (en) * | 1996-06-26 | 1999-08-03 | Mitsubishi Denki Kabushiki Kaisha | Optical disc and optical disc driving apparatus |
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