JPH07312155A - Heat puffer type gas circuit breaker - Google Patents
Heat puffer type gas circuit breakerInfo
- Publication number
- JPH07312155A JPH07312155A JP10270794A JP10270794A JPH07312155A JP H07312155 A JPH07312155 A JP H07312155A JP 10270794 A JP10270794 A JP 10270794A JP 10270794 A JP10270794 A JP 10270794A JP H07312155 A JPH07312155 A JP H07312155A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- chamber
- nozzle
- gas
- space
- 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 title claims description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000005422 blasting Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 53
- 230000000903 blocking effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱パッファ形ガス遮断
器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal puffer type gas circuit breaker.
【０００２】[0002]
【従来の技術】従来の熱パッファ形ガス遮断器について
図を用いて説明する。図３はガス遮断器の遮断部を断面
で示す。図３の中心線から右側は遮断器の投入状態を示
し、左側は遮断状態を示している。この遮断部は、図示
しない遮断器容器内にＳＦ6 等の高圧絶縁ガスと共に収
納されている。2. Description of the Related Art A conventional thermal puffer type gas circuit breaker will be described with reference to the drawings. FIG. 3 shows a cut-off portion of the gas circuit breaker in cross section. The right side from the center line of FIG. 3 shows the closed state of the circuit breaker, and the left side shows the closed state. This breaker is housed together with a high-pressure insulating gas such as SF 6 in a breaker container (not shown).
【０００３】図示右側に示される遮断器の投入状態で
は、可動接触子６が固定接触子５と接触し、電流は、上
部端子２−固定接触子５−可動接触子６という経路を通
って流れる。遮断器の遮断動作時には、図示しない操作
機構により可動接触子６が図示の下方に移動させられ
る。固定接触子５と可動接触子６が開離すると、固定接
触子５と可動接触子６間にアークが発生する。In the closed state of the circuit breaker shown on the right side of the figure, the movable contact 6 comes into contact with the fixed contact 5, and the current flows through the path of the upper terminal 2-fixed contact 5-movable contact 6. . During the breaking operation of the circuit breaker, the movable contact 6 is moved downward in the drawing by an operating mechanism (not shown). When the fixed contact 5 and the movable contact 6 are separated, an arc is generated between the fixed contact 5 and the movable contact 6.
【０００４】この時、可動接触子６がノズル４を塞いで
いるので、昇圧室３は密封状態となっている。この密封
された昇圧室３内でアークが発生すると、昇圧室３内の
絶縁ガスはアークエネルギーにより膨張・加圧され、昇
圧室３内に昇圧ガスとして蓄圧される。そして、図３の
左半分に示すように、可動接触子６が更に下方に移動し
てノズル４から外れると、昇圧室３内に蓄積されていた
昇圧ガスは、図３に符号７で示すように、ノズル４と可
動接触子６間の狭い空間から高速で昇圧室外部へ流れ出
す。このときガス流は、ノズル４を通して固定接触子５
と可動接触子６の間に発生しているアークに対してガス
吹き付け作用を行う。このガス吹き付けにより、アーク
は電流零点付近で遮断される。At this time, since the movable contact 6 blocks the nozzle 4, the pressure raising chamber 3 is in a sealed state. When an arc is generated in the sealed pressure-increasing chamber 3, the insulating gas in the pressure-increasing chamber 3 is expanded / pressurized by the arc energy and accumulated in the pressure-increasing chamber 3 as the pressure-increasing gas. Then, as shown in the left half of FIG. 3, when the movable contactor 6 moves further downward and comes off the nozzle 4, the boosted gas accumulated in the booster chamber 3 is indicated by reference numeral 7 in FIG. In addition, the gas flows out of the pressurizing chamber at a high speed from the narrow space between the nozzle 4 and the movable contactor 6. At this time, the gas flow passes through the nozzle 4 and the fixed contact 5
The gas is applied to the arc generated between the movable contactor 6 and the movable contactor 6. Due to this gas blowing, the arc is cut off near the current zero point.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、以上説
明した熱パッファ形ガス遮断器においては、アークに対
して充分なガス吹き付け力が得られず、必要な遮断性能
を確保することができていなかった。本発明は、熱パッ
ファ形ガス遮断器において、電流遮断時に昇圧室内に効
率良く昇圧ガスの蓄圧を行うことにより、遮断性能を向
上させることを目的とするものである。However, in the thermal puffer type gas circuit breaker described above, a sufficient gas blowing force against the arc cannot be obtained, and the necessary breaking performance cannot be ensured. . SUMMARY OF THE INVENTION It is an object of the present invention to improve the breaking performance of a thermal puffer type gas circuit breaker by efficiently accumulating the boosted gas in the pressure boosting chamber when the current is cut off.
【０００６】[0006]
【課題を解決するための手段】上記従来の熱パッファ形
ガス遮断器において充分な遮断性能が得られない理由に
ついて検討を行った。熱パッファ形ガス遮断器におい
て、昇圧室内の昇圧ガスがアークに対して必要な吹き付
け力を有し、充分な遮断性能を得るためには、昇圧室内
の容積を適正にし、アーク熱により昇圧された昇圧ガス
を効率良く蓄圧する必要があることが判明した。The reason why the conventional thermal puffer type gas circuit breaker cannot obtain sufficient breaking performance was examined. In the thermal puffer type gas circuit breaker, the boosting gas in the boosting chamber has the necessary blowing force against the arc, and in order to obtain sufficient blocking performance, the volume in the boosting chamber was made appropriate and the pressure was boosted by the arc heat. It has been found that it is necessary to efficiently accumulate the pressured gas.
【０００７】すなわち、蓄圧部の容積が小さすぎる場合
には、昇圧ガスを充分に蓄圧できないばかりでなく、過
熱されすぎた状態のガスが蓄積され、アークに吹き付け
るガスの消弧能力に低下をきたす。また逆に、蓄圧部の
容積が大きすぎる場合には、昇圧ガスは蓄圧されるが充
分な圧力とならず、電流零点付近でのアークへの吹き付
けが不充分となり、必要な消弧性能が得られない。That is, when the volume of the pressure accumulating portion is too small, not only the pressure-enhancing gas cannot be accumulated sufficiently, but also the gas in the overheated state is accumulated and the extinguishing ability of the gas blown to the arc is deteriorated. . On the other hand, if the volume of the pressure accumulator is too large, the boosted gas will be accumulated, but the pressure will not be sufficient, and the arc will not be sufficiently blown near the current zero point, and the necessary arc extinguishing performance will be obtained. I can't.
【０００８】これに対し、従来の熱パッファ形ガス遮断
器においては、アーク熱により昇圧された絶縁ガスがノ
ズルより上部の空間にのみ蓄圧されていたため、昇圧室
の容積か小さくて昇圧ガスが過熱されすぎたり、昇圧室
内の容積を大きくしても、昇圧ガスが上部空間からのみ
吹き付けられるため、弱いガス流しか得られないでい
た。On the other hand, in the conventional thermal puffer type gas circuit breaker, the insulating gas boosted by the arc heat is stored only in the space above the nozzle, so that the booster chamber has a small volume and the boosted gas is overheated. Even if the pressure is increased excessively or the volume in the pressure chamber is increased, the pressure gas is blown only from the upper space, so that only a weak gas flow can be obtained.
【０００９】本発明は、これらの検討結果から、上記目
的を達成するため、ノズルを有する容器内に形成された
昇圧室、この昇圧室内に収納された固定接触子および前
記ノズルを通って前記昇圧室内に出入して、前記固定接
触子と接触開離する可動接触子を備えた熱パッファ形ガ
ス遮断器において、前記ノズルを、その先端が前記昇圧
室内部に向けて突出するように配置し、前記昇圧室内で
前記ノズルの外周部分に形成される空間の容積が前記昇
圧室全体の容積の３０〜６０％の範囲内になるようにす
る。According to the present invention, in order to achieve the above-mentioned object from the results of these studies, the pressure boosting chamber formed in a container having a nozzle, the fixed contactor housed in the pressure boosting chamber and the nozzle are used to boost the pressure. In a thermal puffer type gas circuit breaker provided with a movable contactor that moves in and out of a chamber and makes contact with and separates from the fixed contactor, the nozzle is arranged such that its tip projects toward the inside of the boost chamber. The volume of the space formed in the outer peripheral portion of the nozzle in the pressure increasing chamber is set within a range of 30 to 60% of the volume of the entire pressure increasing chamber.
【００１０】[0010]
【作用】ノズルの外周部分に昇圧ガスを蓄積する空間を
設けることにより、従来利用されていなかったノズル下
部の空間を昇圧室の一部として利用し、昇圧室の容積を
増加することができる。昇圧室の容積を増加させること
により、蓄積される昇圧ガスの圧力、温度が適切な値に
保たれ、昇圧ガスの消弧性能を高くすることができる。
また、アークにより過熱された昇圧ガスは、ノズルの上
部空間及び下部空間の両方に蓄圧されるため、ノズルか
ら吹き出される昇圧ガスのガス流は充分な強さでアーク
に対して吹き付けを行う。By providing a space for accumulating the boost gas in the outer peripheral portion of the nozzle, the space under the nozzle which has not been used conventionally can be used as a part of the boost chamber and the volume of the boost chamber can be increased. By increasing the volume of the booster chamber, the pressure and temperature of the stored booster gas can be maintained at appropriate values, and the arc extinguishing performance of the booster gas can be improved.
Further, since the pressure-enhanced gas superheated by the arc is accumulated in both the upper space and the lower space of the nozzle, the gas flow of the pressure-enhanced gas blown out from the nozzle blows against the arc with sufficient strength.
【００１１】また、ノズル外周部に形成される空間の容
積を、昇圧室全体の容積に対して３０〜６０％の範囲に
設定することが、昇圧ガスを適切な温度、圧力に保つこ
ととなり、必要な消弧性能が得られる。Further, setting the volume of the space formed on the outer peripheral portion of the nozzle within the range of 30 to 60% of the volume of the entire pressurizing chamber keeps the pressurizing gas at an appropriate temperature and pressure, The required arc extinguishing performance can be obtained.
【００１２】[0012]
【実施例】本発明の実施例を図を用いて説明する。図１
はガス遮断器の遮断部を断面で示す。図１の中心線から
右側は遮断器の投入状態を示し、左側は遮断状態を示し
ている。この遮断部は、図示しない遮断器容器内にＳＦ
6 ガスと共に収納され、高圧絶縁ガス雰囲気中に置かれ
ている。遮断部において、絶縁物製の容器１および上部
端子２により昇圧室３が形成される。容器１の一部にノ
ズル４が形成され、そのノズル４の開口を通して可動接
触子６が昇圧室内に出入りする。なお、このノズル４
は、容器１と一体に形成されてもよいし、別に形成した
ものを組み合わせて形成することもできる。Embodiments of the present invention will be described with reference to the drawings. Figure 1
Shows the cutoff part of the gas circuit breaker in cross section. The right side from the center line of FIG. 1 shows the closed state of the circuit breaker, and the left side shows the closed state. This breaker is installed in the breaker container (not shown).
It is stored together with 6 gases and placed in a high-pressure insulating gas atmosphere. A pressure boosting chamber 3 is formed by the insulating container 1 and the upper terminal 2 in the shutoff portion. A nozzle 4 is formed in a part of the container 1, and the movable contact 6 enters and leaves the pressurizing chamber through an opening of the nozzle 4. In addition, this nozzle 4
May be formed integrally with the container 1 or may be formed separately by combining them.
【００１３】また、ノズル４は、その先端が昇圧室３内
部に向けて突出するように配置されることにより、ノズ
ル４の外周部分に昇圧ガスを蓄圧するための空間Ａを形
成する。そして、この空間の容積は、昇圧室３全体の容
積の３０〜６０％の範囲内に設定される。昇圧室３内に
は、固定接触子５が上部端子２に取り付けられて収納さ
れる。上部端子２と固定接触子５は電気的に接続されて
いる。Further, the nozzle 4 is arranged so that its tip projects toward the inside of the pressurizing chamber 3, thereby forming a space A for accumulating the pressurizing gas in the outer peripheral portion of the nozzle 4. And the volume of this space is set within the range of 30 to 60% of the volume of the entire pressurizing chamber 3. A fixed contact 5 is attached to the upper terminal 2 and housed in the booster chamber 3. The upper terminal 2 and the fixed contact 5 are electrically connected.
【００１４】可動接触子６は、図示しない操作機構によ
り図示上下方向に駆動され、容器１に設けたノズル４を
通して昇圧室３内に出入りし、固定接触子５と接触開離
する。図示右側に示す遮断器の投入状態では、可動接触
子６は固定接触子５と接触し、電流が上部端子２−固定
接触子５−可動接触子６という経路を通って流れる。こ
の時、可動接触子６がノズル４の開口を塞いでいるた
め、昇圧室３は密封されている。The movable contactor 6 is driven in the vertical direction in the figure by an operating mechanism (not shown) to move in and out of the pressure boosting chamber 3 through the nozzle 4 provided in the container 1 and contact with and separate from the fixed contactor 5. In the closed state of the circuit breaker shown on the right side of the figure, the movable contact 6 comes into contact with the fixed contact 5, and the current flows through the path of the upper terminal 2-fixed contact 5-movable contact 6. At this time, since the movable contact 6 closes the opening of the nozzle 4, the pressurizing chamber 3 is sealed.
【００１５】次に、遮断器の遮断動作時には、図示右側
の投入状態から、図示しない操作機構により可動接触子
６が図示の下方に移動させられる。これにより固定接触
子５と可動接触子６が開離し、両接触子５，６間にアー
クが発生する。この時、密封状態の昇圧室３内でアーク
が発生することにより、昇圧室３内の絶縁ガスはアーク
エネルギーにより膨張・加圧される。これにより昇圧さ
れた昇圧ガスは、昇圧室３内のノズル４の上部空間及び
下部空間Ａ内に蓄積される。昇圧室３は、前記従来の遮
断器と比較して、ノズル４の外周部に形成された空間Ａ
により容積が増加している。したがって、昇圧室３内に
蓄圧される昇圧ガスは、過熱されすぎず、かつアークに
対する吹き付けに必要な圧力に昇圧されて、効率良く蓄
圧される。Next, during the breaking operation of the circuit breaker, the movable contact 6 is moved downward in the drawing from the closing state on the right side of the drawing by an operating mechanism (not shown). As a result, the fixed contact 5 and the movable contact 6 are separated from each other, and an arc is generated between the two contactors 5, 6. At this time, an arc is generated in the pressure-increasing chamber 3 in a sealed state, so that the insulating gas in the pressure-increasing chamber 3 is expanded / pressurized by the arc energy. The boosted gas boosted by this is accumulated in the upper space and the lower space A of the nozzle 4 in the booster chamber 3. The pressurizing chamber 3 has a space A formed in the outer peripheral portion of the nozzle 4 as compared with the conventional circuit breaker.
Due to this, the volume is increasing. Therefore, the boosted gas stored in the booster chamber 3 is not overheated and is boosted to a pressure necessary for spraying the arc, and is efficiently stored.
【００１６】そして、図１の左半分に示すように、可動
接触子６が更に下方に移動してノズル４から外れると、
昇圧室３内に蓄圧されていた昇圧ガスはノズル４の開口
を通して、図１の符号７に示すように、高速で外部の排
気側へ流れ出す。また、この時ノズル４から吹き出す昇
圧ガスは、ノズル４の上部空間及び下部空間Ａの両方か
ら供給される。Then, as shown in the left half of FIG. 1, when the movable contact 6 further moves downward and comes off the nozzle 4,
The boosted gas accumulated in the booster chamber 3 flows out through the opening of the nozzle 4 at high speed to the outside exhaust side as shown by reference numeral 7 in FIG. At this time, the pressurized gas blown out from the nozzle 4 is supplied from both the upper space and the lower space A of the nozzle 4.
【００１７】これにより、固定接触子５と可動接触子６
の間に発生しているアークに対してノズル４を通してガ
ス吹き付けが行われ、熱パッファによる消弧作用により
電流遮断が行われる。この時、ノズル４の外周部に適切
な容積の空間Ａが形成されたことにより、昇圧ガスは消
弧に必要な温度及び圧力に保たれており、さらに昇圧ガ
スがノズル４の上下の空間から供給されるので、アーク
に対して充分な強さで吹き付けられ、良好な消弧作用が
得られる。As a result, the fixed contact 5 and the movable contact 6
Gas is blown through the nozzle 4 to the arc generated during the period, and the current is cut off by the extinguishing action of the thermal puffer. At this time, since the space A having an appropriate volume is formed on the outer peripheral portion of the nozzle 4, the pressure-boosting gas is maintained at the temperature and pressure necessary for extinguishing the arc, and the pressure-boosting gas is further discharged from the space above and below the nozzle 4. Since it is supplied, it is blown against the arc with sufficient strength, and good arc extinguishing action is obtained.
【００１８】次に、ノズル４の外周部に形成される空間
の容積Ａを昇圧室３全体の容積に対して３０〜６０％の
範囲内に設定した理由について説明する。空間容積Ａを
昇圧室３全体の容積に対して変化させて遮断性能を調べ
る実験を行ったところ、図２に示す実験結果が得られ
た。図から明らかなように、空間Ａの容積と昇圧室３全
体の容積との比が３０〜６０％の範囲で必要な遮断性能
が得られる。Next, the reason why the volume A of the space formed on the outer peripheral portion of the nozzle 4 is set within the range of 30 to 60% of the volume of the entire pressurizing chamber 3 will be described. When an experiment was conducted to examine the blocking performance by changing the space volume A with respect to the volume of the entire pressurizing chamber 3, the experimental results shown in FIG. 2 were obtained. As is clear from the figure, the required blocking performance can be obtained when the ratio of the volume of the space A to the volume of the entire pressurizing chamber 3 is in the range of 30 to 60%.
【００１９】[0019]
【発明の効果】本発明によれば、熱パッファ形ガス遮断
器において、電流遮断時に昇圧室内に効率良く昇圧ガス
の蓄圧を行うことにより、遮断性能を向上させることが
できる。According to the present invention, in the thermal puffer type gas circuit breaker, the breaking performance can be improved by efficiently accumulating the boosted gas in the boosting chamber when the current is cut off.
【図１】本発明の実施例の熱パッファ形ガス遮断器の側
面断面図。FIG. 1 is a side sectional view of a thermal puffer type gas circuit breaker according to an embodiment of the present invention.
【図２】図１の遮断器の遮断性能の実験結果を示すグラ
フ。FIG. 2 is a graph showing experimental results of breaking performance of the circuit breaker of FIG.
【図３】従来の熱パッファ形ガス遮断器の側面断面図。FIG. 3 is a side sectional view of a conventional thermal puffer type gas circuit breaker.
１…容器 ２…上部端子 ３…昇圧室 ４…ノズル ５…固定接触子 ６…可動接触子 Ａ…昇圧ガス蓄圧空間 DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Upper terminal 3 ... Booster chamber 4 ... Nozzle 5 ... Fixed contactor 6 ... Movable contactor A ... Boosted gas pressure storage space
Claims (1)
室、この昇圧室内に収納された固定接触子、及び前記ノ
ズルを通って前記昇圧室内に出入して、前記固定接触子
と接触開離する可動接触子を備えた熱パッファ形ガス遮
断器において、前記ノズルが、その先端が前記昇圧室内
部に向けて突出するように配置され、前記昇圧室内で前
記ノズルの外周部分に形成される空間の容積が前記昇圧
室全体の容積の３０〜６０％とされたことを特徴とする
熱パッファ形ガス遮断器。1. A pressurizing chamber formed in a container having a nozzle, a fixed contactor housed in the pressurizing chamber, and a contact opening / closing unit that moves into and out of the pressurizing chamber through the nozzle to come into contact with and separate from the fixed contactor. In a thermal puffer type gas circuit breaker having a movable contactor, the nozzle is arranged such that its tip projects toward the inside of the pressure increasing chamber, and a space formed in the outer peripheral portion of the nozzle in the pressure increasing chamber. The heat puffer type gas circuit breaker has a volume of 30 to 60% of the volume of the entire pressurizing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10270794A JPH07312155A (en) | 1994-05-17 | 1994-05-17 | Heat puffer type gas circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10270794A JPH07312155A (en) | 1994-05-17 | 1994-05-17 | Heat puffer type gas circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07312155A true JPH07312155A (en) | 1995-11-28 |
Family
ID=14334747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10270794A Pending JPH07312155A (en) | 1994-05-17 | 1994-05-17 | Heat puffer type gas circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07312155A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014122814A1 (en) | 2013-02-07 | 2014-08-14 | 三菱電機株式会社 | Arc-extinguishing insulating material molding and gas circuit breaker using same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583980B2 (en) * | 1984-02-28 | 1993-11-30 | Sony Corp |
-
1994
- 1994-05-17 JP JP10270794A patent/JPH07312155A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583980B2 (en) * | 1984-02-28 | 1993-11-30 | Sony Corp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014122814A1 (en) | 2013-02-07 | 2014-08-14 | 三菱電機株式会社 | Arc-extinguishing insulating material molding and gas circuit breaker using same |
| US9475906B2 (en) | 2013-02-07 | 2016-10-25 | Mitsubishi Electric Corporation | Arc-extinguishing insulation material molded product and gas circuit breaker including the same |
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