JPS6161491B2 - - Google Patents
Info
- Publication number
- JPS6161491B2 JPS6161491B2 JP56000397A JP39781A JPS6161491B2 JP S6161491 B2 JPS6161491 B2 JP S6161491B2 JP 56000397 A JP56000397 A JP 56000397A JP 39781 A JP39781 A JP 39781A JP S6161491 B2 JPS6161491 B2 JP S6161491B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- magnetic field
- electrode
- parallel magnetic
- current
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアークと平行な磁界を発生する平行磁
界型のアーク電極を改良した真空しや断器に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum shear breaker which is an improved parallel magnetic field type arc electrode that generates a magnetic field parallel to the arc.
近年、大電流をしや断する真空しや断器とし
て、アークに平行な磁界を発生する平行磁界型電
極を用いる例で多くなつて来た。平行磁界電極
は、真空容器内に一対の接離可能なアーク電極を
対応配置し、アーク電極の少なくとも一方の裏面
に通電部を電気的に接続する。通電部より真空容
器外に延びる導電棒を通電部に設けている。通電
部は、導電棒を包囲するリング状の円周部と、円
周部と導電棒との間に接続した導電棒を介して互
いに反対方向に延びるアーム部とから構成してい
る。アーク電極と通電部との間に高抵抗部材から
成る支持体を介して、導電棒からの電流をアーム
部に流すようにしている。他方のアーク電極にも
導電棒を設けている。
In recent years, parallel magnetic field type electrodes that generate a magnetic field parallel to the arc have been increasingly used as vacuum shield circuit breakers that cut off large currents. In the parallel magnetic field electrode, a pair of arc electrodes that can be connected to and separated from each other are arranged correspondingly in a vacuum container, and a current-carrying part is electrically connected to the back surface of at least one of the arc electrodes. A conductive rod extending from the current-carrying part to the outside of the vacuum container is provided in the current-carrying part. The current-carrying portion includes a ring-shaped circumferential portion that surrounds the conductive rod, and arm portions that extend in opposite directions via the conductive rod that is connected between the circumferential portion and the conductive rod. A current from the conductive rod is passed through the arm section through a support made of a high-resistance material between the arc electrode and the current-carrying section. A conductive rod is also provided on the other arc electrode.
一方の導電棒に設けた操作器を駆動すると、ア
ーク電極間にアークを発生する。アークにはアー
クと平行な磁界が印加される。すなわち、導電棒
からの電流は、アーム部で互いに反対方向に流れ
て円周部に達する。電流は円周部で互いに異なる
円周方向に流れて、中間部でアーク電極に流れ
る。したがつて、通電部のアーム部とアーク電極
とでアークに平行な異方向の平行磁界を発生し、
アークを無数の糸状アークに分散して、消弧す
る。 When the operating device provided on one of the conductive rods is driven, an arc is generated between the arc electrodes. A magnetic field parallel to the arc is applied to the arc. That is, the currents from the conductive rods flow in opposite directions in the arm portions and reach the circumferential portion. Current flows in different circumferential directions at the circumferential portion, and flows to the arc electrode at the middle portion. Therefore, parallel magnetic fields in different directions parallel to the arc are generated between the arm part of the current-carrying part and the arc electrode,
The arc is dispersed into countless thread-like arcs and extinguished.
この平行磁界型電極の電流は、円周部およびア
ーム部とアーク電極のアーム部とから成る４個の
扇形領域で異方向の平行磁界を発生するため、電
極中心附近は零であり、中心附近から外径方向に
進むに従つて平行磁界は、強くなる。そして、中
心部と円周部との中間でピークに達した後は弱く
なり、円周部では再び零となる平行磁界分布特性
となる。 The current of this parallel magnetic field type electrode generates parallel magnetic fields in different directions in four fan-shaped areas consisting of the circumferential part, the arm part, and the arm part of the arc electrode, so the current is zero near the center of the electrode, and The parallel magnetic field becomes stronger as it advances in the outer radial direction. Then, after reaching a peak between the center and the circumference, it becomes weaker and becomes zero again at the circumference, resulting in a parallel magnetic field distribution characteristic.
このような平行磁界分布特性の場合、アーク電
極の中心部に小さい凸状の接触面を設ければ、ア
ークは接触面で点弧をする。しかし、アークは無
磁界領域でアークを点弧することになり、アーク
が強い磁界側に移動するという現象が起らず、あ
る程度電流が大きくなつてから動きだす。その結
果、接触面の損傷が著しく、消弧後電極間に印加
される電極に耐えられずしや断不能を起す。
In the case of such parallel magnetic field distribution characteristics, if a small convex contact surface is provided at the center of the arc electrode, the arc is ignited at the contact surface. However, the arc is ignited in a region with no magnetic field, so the phenomenon of the arc moving to the side of a strong magnetic field does not occur, and the arc begins to move after the current increases to a certain extent. As a result, the contact surface is severely damaged and cannot withstand the electrode applied between the electrodes after the arc is extinguished.
逆に、接触面が大きすぎると、最後に開離する
点にアークが発弧することになるが、アークは磁
界の強い方向に集まる特性があるため、磁界の強
い個所で発弧すると、全電流がその領域に集中
し、分散できなくなつてしまいしや断不能を起
す。 Conversely, if the contact surface is too large, an arc will strike at the point where it finally breaks, but since arcs have the characteristic of converging in the direction of strong magnetic fields, if they strike in a place where the magnetic field is strong, the entire arc will be fired. The current concentrates in that area and cannot be dispersed, resulting in failure.
本発明の目的は、接触面でアークが停滞するの
を防止して、しや断性能を良くした真空しや断器
を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum shear breaker that prevents the arc from stagnation on the contact surface and has improved shear cutting performance.
この目的を達成するために本発明のアーク電極
は、電極中心部より最大平行磁界領域の手前に凸
型形状のアーク接触子を設ける。
In order to achieve this object, the arc electrode of the present invention is provided with a convex arc contactor in front of the maximum parallel magnetic field region from the center of the electrode.
アーク接触子に点弧したアークは、すぐに最大
平行磁界領域に移動し、接触面の損傷が少なく、
しや断性能を向上することができる。
The arc ignited by the arc contactor immediately moves to the maximum parallel magnetic field region, causing less damage to the contact surface.
The shear cutting performance can be improved.
以下、本発明の実施例を第１図に示す平行磁界
型の真空しや断器１により説明する。
Hereinafter, an embodiment of the present invention will be explained using a parallel magnetic field type vacuum shield disconnector 1 shown in FIG.
絶縁筒２とこの両端を端板３で密封し内部を真
空に形成した真空容器４の内部は、互いに対応す
る固定電極５と可動電極６とを配置する。これら
の電極の裏面から外部に導電棒７，８が延びてい
る。可動電極側の導電棒８と端板３との間に可撓
性のベローズ９を設けて、図示していない操作器
を駆動して、可動電極５を固定電極６に接離す
る。この時、第２図に示すようにアーク１０を生
ずる。絶縁筒２と電極５，６との間に配置された
中間シールド１１は、絶縁筒内壁面に支持されて
いる。中間シールド１１は電極開離時に生ずるア
ーク１０による蒸発金属が絶縁筒が附着するのを
防止している。固定電極５および可動電極６の構
造は、同じなので、可動電極６の構造を例にとり
第２，３図により説明する。 A fixed electrode 5 and a movable electrode 6 that correspond to each other are arranged inside a vacuum container 4 in which the insulating tube 2 and both ends thereof are sealed with end plates 3 to form a vacuum. Conductive rods 7 and 8 extend outward from the back surfaces of these electrodes. A flexible bellows 9 is provided between the conductive rod 8 on the movable electrode side and the end plate 3, and the movable electrode 5 is brought into contact with and separated from the fixed electrode 6 by driving an operating device (not shown). At this time, an arc 10 is generated as shown in FIG. An intermediate shield 11 disposed between the insulating cylinder 2 and the electrodes 5 and 6 is supported by the inner wall surface of the insulating cylinder. The intermediate shield 11 prevents the insulating tube from adhering to evaporated metal due to the arc 10 that occurs when the electrodes are separated. Since the structures of the fixed electrode 5 and the movable electrode 6 are the same, the structure of the movable electrode 6 will be explained using FIGS. 2 and 3 as an example.
導電棒８は中空部１２および段部１３を形成す
る。中空部１２には高抵抗部材たとえばステンレ
ス鋼から成る支持体１４を挿入する。段部１３お
よび支持体１４は通電部１５を支持する。通電部
１５は、支持体１４を挿入する中心穴１６を有す
る中心部１７と、１端が中心部に接続したアーム
１７Ａの他端と空間１８を介して接続している円
周部１９とから構成され、円周部には突起部２０
を設けている。突起部２０と支持体１４に形成し
た段部２１とにアーク電極２２と高抵抗部材の補
強板２３とを支持すると共に、支持体１４の中心
部２４は補強体２３を貫通している。アーク電極
２２は突起部２０と中心部との間に設けた第１ア
ーム部２５と、第１アーム部２５の電流方向と直
角方向に設けた溝に囲まれた第２アーム部２８と
から構成されている。アーク接触子２６の接触面
２６Ａは第１および第２アーク部２５，２８の高
さ寸法Ｌ、中心に窪部２７を形成している。窪部
２７の直径寸法d1は、支持体１４の直径寸法と略
等しく形成する。接触面２６Ａの直径寸法d2は、
導電棒８から多少円周部１９よりに形成するが、
後述する平行磁界の一番強い個所まで延長しな
い。 The conductive rod 8 forms a hollow portion 12 and a stepped portion 13 . A support 14 made of a high-resistance material such as stainless steel is inserted into the hollow portion 12 . The stepped portion 13 and the support body 14 support the current-carrying portion 15 . The current-carrying part 15 includes a center part 17 having a center hole 16 into which the support body 14 is inserted, and a circumferential part 19 whose one end is connected to the other end of the arm 17A via a space 18 and which is connected to the center part. The circumferential portion has a protrusion 20.
has been established. An arc electrode 22 and a reinforcing plate 23 made of a high-resistance member are supported by the protrusion 20 and a step 21 formed on the support 14, and the center 24 of the support 14 passes through the reinforcement 23. The arc electrode 22 is composed of a first arm part 25 provided between the projection part 20 and the center part, and a second arm part 28 surrounded by a groove provided in the direction perpendicular to the current direction of the first arm part 25. has been done. The contact surface 26A of the arc contactor 26 has a height dimension L of the first and second arc parts 25 and 28, and a recessed part 27 is formed at the center. The diameter d 1 of the recess 27 is formed to be approximately equal to the diameter of the support 14 . The diameter dimension d 2 of the contact surface 26A is
Although it is formed somewhat closer to the circumferential portion 19 from the conductive rod 8,
Do not extend to the point where the parallel magnetic field is strongest, which will be described later.
次に、固定電極５および可動電極６には第２図
に示すような電流Ｉが流れているので、両電極を
開離すると、アーク１０を発生する。アーク電流
Ｉはアーム部１７Ａ−円周部１９−第１および第
２アーム部２５，２８へ流れ、各アーム部１７
Ａ，２５，２８に流れる電流によつて、第４図に
示す如く異方向の平行磁界３０を発生する。平行
磁界３０を扇形の４領域Ａ，Ｂ，Ｃ，Ｄに分けら
れる。４領域Ａ〜Ｄは、中心Ｏ附近で零であり、
中心Ｏから外径方向Ｒに進むに従つて平行磁界は
強くなる。そして、一度最大領域で最高平行磁界
X2に達した後は弱くなり、円周部１９で零とな
るので、第５図に示す異方向の平行磁界分布特性
図Ｘを得る。このため、接触面２６Ａに点弧した
アーク１０は、接触面２６Ａの平行磁界X1によ
つてより強い平行磁界X2を有する第１および第
２アーム部２５，２８に移動し、消弧する。従つ
て、接触面２６Ａでアークが停滞することなく、
しや断性能を向上させることができる。また、接
触面２６Ａは強い平行磁界X2を有する各アーム
部２５，２８に設けていないため、開離時にアー
クが集中することなく、より一層しや断性能を向
上できる。 Next, since a current I as shown in FIG. 2 flows through the fixed electrode 5 and the movable electrode 6, an arc 10 is generated when the two electrodes are separated. The arc current I flows from the arm portion 17A to the circumferential portion 19 to the first and second arm portions 25 and 28, and
The current flowing through A, 25, and 28 generates parallel magnetic fields 30 in different directions as shown in FIG. The parallel magnetic field 30 can be divided into four fan-shaped areas A, B, C, and D. 4 areas A to D are zero near the center O,
The parallel magnetic field becomes stronger as it advances in the outer radial direction R from the center O. And once the highest parallel magnetic field in the maximum area
After reaching X 2 , it becomes weaker and becomes zero at the circumferential portion 19, so that a parallel magnetic field distribution characteristic diagram X in different directions shown in FIG. 5 is obtained. Therefore, the arc 10 ignited on the contact surface 26A moves to the first and second arm parts 25, 28 having a stronger parallel magnetic field X2 due to the parallel magnetic field X1 of the contact surface 26A, and is extinguished. . Therefore, the arc does not stagnate on the contact surface 26A,
The shear cutting performance can be improved. Further, since the contact surface 26A is not provided on each arm portion 25, 28 which has a strong parallel magnetic field X2 , arcs are not concentrated during separation, and the shearing performance can be further improved.
以上のように本発明のアーク電極によれば、し
や断性能を向上させることができる。
As described above, according to the arc electrode of the present invention, the shearing performance can be improved.
第１図は本発明の実施例である真空しや断器の
側断面図、第２図は固定電極の分解斜視図、第３
図は第２図−線断面図、第４図は第２図で発
生した平行磁界の説明図、第５図は平行磁界分布
特性図である。
２……真空容器、５……固定電極、６……可動
電極、７，８……導電棒、１５……通電部、２２
……アーク電極、２５および２８……第１および
第２アーム部、２６……アーク接触子、２７……
窪部。
Fig. 1 is a side sectional view of a vacuum shield breaker which is an embodiment of the present invention, Fig. 2 is an exploded perspective view of a fixed electrode, and Fig. 3 is an exploded perspective view of a fixed electrode.
The figures are a sectional view taken along the line shown in FIG. 2, FIG. 4 is an explanatory diagram of the parallel magnetic field generated in FIG. 2, and FIG. 5 is a parallel magnetic field distribution characteristic diagram. 2... Vacuum container, 5... Fixed electrode, 6... Movable electrode, 7, 8... Conductive rod, 15... Current carrying part, 22
...Arc electrode, 25 and 28...First and second arm parts, 26...Arc contactor, 27...
depression.
Claims (1)
し、アーク電極に設けられた真空容器外に延びる
導電棒と、アーク電極に点弧したアークに異方向
の平行磁界を印加する平行磁界発生部を設けたも
のにおいて、上記アーク電極は、導電棒と対応す
る中心部と最大平行磁界領域に達する手前の領域
との間を、他のアーク電極の高さ寸法より高くし
たアーク接触子を配置することを特徴とする真空
しや断器。1 A pair of arc electrodes are arranged correspondingly in a vacuum vessel, and a conductive rod provided on the arc electrode that extends outside the vacuum vessel, and a parallel magnetic field generator that applies parallel magnetic fields in different directions to the arc ignited in the arc electrode. In the case where the arc electrode is provided with an arc contactor whose height is higher than that of other arc electrodes, the distance between the center portion corresponding to the conductive bar and the region before reaching the maximum parallel magnetic field region is arranged. A vacuum cutter featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP39781A JPS57113523A (en) | 1981-01-07 | 1981-01-07 | Vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP39781A JPS57113523A (en) | 1981-01-07 | 1981-01-07 | Vacuum breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57113523A JPS57113523A (en) | 1982-07-15 |
| JPS6161491B2 true JPS6161491B2 (en) | 1986-12-25 |
Family
ID=11472666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP39781A Granted JPS57113523A (en) | 1981-01-07 | 1981-01-07 | Vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57113523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124679U (en) * | 1987-02-04 | 1988-08-15 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4979569B2 (en) * | 2007-12-26 | 2012-07-18 | 株式会社日立製作所 | Vacuum switchgear |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5370371A (en) * | 1976-12-06 | 1978-06-22 | Hitachi Ltd | Vacuum breaker |
| JPS5320476B2 (en) * | 1972-03-14 | 1978-06-27 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320476U (en) * | 1976-07-31 | 1978-02-21 |
-
1981
- 1981-01-07 JP JP39781A patent/JPS57113523A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320476B2 (en) * | 1972-03-14 | 1978-06-27 | ||
| JPS5370371A (en) * | 1976-12-06 | 1978-06-22 | Hitachi Ltd | Vacuum breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124679U (en) * | 1987-02-04 | 1988-08-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57113523A (en) | 1982-07-15 |
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