JP2645089B2 - Vacuum valve - Google Patents
Vacuum valveInfo
- Publication number
- JP2645089B2 JP2645089B2 JP18565688A JP18565688A JP2645089B2 JP 2645089 B2 JP2645089 B2 JP 2645089B2 JP 18565688 A JP18565688 A JP 18565688A JP 18565688 A JP18565688 A JP 18565688A JP 2645089 B2 JP2645089 B2 JP 2645089B2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- vacuum valve
- alloy
- infiltrated
- solid
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
- H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、電気回路の開閉を行うしゃ断器等の真空バ
ルブに関し、接点の組合せにより耐溶着性及び再点弧発
生率を改良したものである。The present invention relates to a vacuum valve such as a circuit breaker for opening and closing an electric circuit, and relates to a welding resistance and a re-ignition occurrence rate depending on a combination of contacts. Is an improvement of
（従来の技術と発明が解決しようとする課題） 大電流用のしゃ断器の接点は、接触面が消耗しまた変
形され、あるいは酸化して、接触抵抗を増大して接触不
良をおこし、また接点の溶着をおこしやすい。そのた
め、容器内に接点部分を密閉し、その容器内を真空に保
持した真空バルブが用いられている。(Problems to be solved by the prior art and the invention) The contacts of a circuit breaker for large currents are worn or deformed or oxidized at the contact surface, increasing the contact resistance and causing poor contact. Easy to weld. Therefore, a vacuum valve is used in which a contact portion is sealed in a container and the inside of the container is kept at a vacuum.
従来、大電流用の真空バルブ用接点としては、例えば
固相燒結法によって製造されたCu−Cr系合金又は溶浸法
によって製造されたCu−Cr系合金が用いられているが、
同種品からなる接点同士を配するのが通常である。しか
しながら、上記固相燒結Cu−Cr系合金からなる接点は、
比較的耐溶着性は良好であるが、再点弧発生率が大きい
欠点を有し、また上記溶浸Cu−Cr系合金からなる接点
は、再点弧発生率は少ないが、耐溶着性が悪い欠点があ
り、それぞれ一長一短があった。Conventionally, as a contact for a vacuum valve for a large current, for example, a Cu-Cr-based alloy manufactured by a solid-state sintering method or a Cu-Cr-based alloy manufactured by an infiltration method is used,
It is usual to arrange contacts made of the same kind. However, the contact made of the solid-phase sintered Cu-Cr alloy is
Although the welding resistance is relatively good, it has the disadvantage that the re-ignition occurrence rate is large, and the contact made of the infiltrated Cu-Cr alloy has a low re-ignition occurrence rate, but the welding resistance is low. There were bad drawbacks, each with its pros and cons.
そのため、双方の欠点を改良した接点特性を有する真
空バルブが望まれている。Therefore, a vacuum valve having contact characteristics in which both disadvantages are improved is desired.
［発明の構成］ （課題を解決するための手段と作用） 本発明は、一方に固相燒結法によって製造されたCu−
Cr系合金からなる接点、他の一方に溶浸法によって製造
されたCu−Cr系合金からなる接点を配したことを特徴と
する真空バルブである。[Constitution of the Invention] (Means and Actions for Solving the Problems) The present invention relates to a method for producing Cu-
A vacuum valve, comprising a contact made of a Cr-based alloy and a contact made of a Cu-Cr-based alloy manufactured by an infiltration method on the other side.
本発明の、製法が異なる異種品を組合せた接点の特性
は、意外にもそれぞれのCu−Cr系合金の接点の長所を保
持したままで、欠点が大巾に改善されることがわかっ
た。It has been found that the characteristics of the contact of the present invention in which different types of products having different manufacturing methods are combined surprisingly greatly improve the disadvantages while maintaining the advantages of the respective Cu-Cr alloy contacts.
固相燒結Cu−Cr系合金は、公知の粉末治金法でCu及び
Cr金属粉末を成形、燒結することにより製造され、配合
比はCu75〜25重量％に対しCr25〜75重量％と広い組成比
で変更することができるが、好ましくは50:50である。
また、一方の溶浸Cu−Cr系合金は、公知の粉末治金法で
Cr粉末を燒結してスケルトンとし、このスケルトンの空
隙部にCuを溶浸して製造される。配合比はCu60〜25重量
％に対しCr40〜75重量％、好ましくは50:50の組成比の
ものである。Solid-phase sintered Cu-Cr alloys are made of Cu and
It is manufactured by molding and sintering a Cr metal powder, and the compounding ratio can be changed in a wide composition ratio of 25 to 75% by weight of Cr to 75 to 25% by weight of Cu, but is preferably 50:50.
In addition, one infiltrated Cu-Cr alloy is prepared by a known powder metallurgy method.
It is manufactured by sintering Cr powder to form a skeleton, and infiltrating Cu into the voids of the skeleton. The compounding ratio is a composition ratio of 40 to 75% by weight of Cr to 60 to 25% by weight of Cu, preferably 50:50.
また、接点の表面組成を改良して耐溶着性を良くする
ために、少なくとも一方の接点に、0.05〜3.0重量％のB
i又は／及びTeをCu−Cr複合体に添加して製造された材
料を用いることにより、より一層の改善効化があがる。Further, in order to improve the surface composition of the contact and improve the welding resistance, at least one of the contacts has 0.05 to 3.0% by weight of B
By using a material produced by adding i or / and Te to the Cu-Cr composite, the effect of improvement is further improved.
以下、実施例により説明する。 Hereinafter, an embodiment will be described.
実施例１ Cu粉末とCr粉末を1:1の割合で配合し、成形圧力７ト
ン/cm2で成形して成形体を得た。これを不活性雰囲気中
800℃で１時間燒結させた。上記と同条件で成形、燒結
を数回繰返し、理論比重の95％以上の固相燒結Cr−Cu系
合金を得、これを真空バルブの一方の接点とした。Example 1 A Cu powder and a Cr powder were mixed at a ratio of 1: 1 and molded at a molding pressure of 7 ton / cm 2 to obtain a molded body. In an inert atmosphere
Sintering was performed at 800 ° C. for 1 hour. Forming and sintering were repeated several times under the same conditions as above to obtain a solid-phase sintered Cr-Cu alloy having a specific gravity of 95% or more, which was used as one contact of a vacuum valve.
他方100％Cr粉末を黒鉛容器に充填し、不活性雰囲気
中1200℃で１時間燒結を施し、スケルトンを得た。次に
不活性雰囲気中1100℃で0.5時間、無酸素Cu100％をCrス
ケルトンに溶浸させて溶浸Cu−Cr系合金（50:50）を
得、これを真空バルブの一方の接点とした。On the other hand, a graphite container was filled with 100% Cr powder and sintered at 1200 ° C. for 1 hour in an inert atmosphere to obtain a skeleton. Next, 100% oxygen-free Cu was infiltrated into the Cr skeleton at 1100 ° C. for 0.5 hour in an inert atmosphere to obtain an infiltrated Cu—Cr alloy (50:50), which was used as one contact of a vacuum valve.
実施例２ 一方の接点には、実施例１と同じ固相燒結Cu−Cr系合
金を用い、他の一方の接点には、Te9％を添加した以外
は実施例１と同じ溶浸Cu−Cr系合金を用いた。Example 2 The same solid-state sintered Cu-Cr alloy as in Example 1 was used for one contact, and the same infiltrated Cu-Cr as Example 1 except that 9% of Te was added to the other contact. A system alloy was used.
実施例３ 一方の接点には、実施例１と同じ固相燒結Cu−Cr系合
金を用い、他の一方の接点には、Bi0.25％を添加した以
外は実施例１と同じ溶浸Cu−Cr系合金を用いた。Example 3 The same solid-state sintered Cu-Cr alloy as in Example 1 was used for one contact, and the same infiltrated Cu as in Example 1 except that Bi 0.25% was added to the other contact. -A Cr-based alloy was used.
実施例４ 一方の接点には、実施例１と同じ固相燒結Cu−Cr系合
金を用い、他の一方の接点には、Te6.0％とBi0.17％を
添加した以外は実施例１と同じ溶浸Cu−Cr系合金を用い
た。Example 4 The same solid-state sintering Cu-Cr alloy as in Example 1 was used for one contact, and Te6.0% and Bi0.17% were added to the other contact. The same infiltrated Cu-Cr alloy was used.
比較例１ 実施例１で示した固相燒結Cu−Cr系合金からなる接点
同志を用いた。Comparative Example 1 The contacts made of the solid-phase sintered Cu-Cr alloy shown in Example 1 were used.
比較例２ 実施例１で示した溶浸Cu−Cr系合金からなる接点同志
を用いた。Comparative Example 2 The contacts made of the infiltrated Cu-Cr alloy shown in Example 1 were used.
試験例 評価方法は次のようにして行い、試験結果は表のとお
りであった。Test Example The evaluation method was performed as follows, and the test results were as shown in the table.
（１）耐溶着性 外径25mmφの一対の円板状試料に、外径25mmφ先端が
100Rの球面をなす加圧ロッドを対向させ、100kgの荷重
を加えて10-5mmHgの真空中において50Hz、20KAの電流を
20ミリ秒間通電し、その時の試料・ロッド間の引きはが
しに必要な力を測定し、耐溶着性を判断した。表では比
較例１の値に対する相対値で示した。(1) Welding resistance A pair of disk-shaped specimens with an outer diameter of 25 mmφ have a tip with an outer diameter of 25 mmφ.
It is opposed to the pressure rod forms a spherical 100R, in 10 -5 mmHg in vacuum by applying a load of 100 kg 50 Hz, the current of 20KA
The current was applied for 20 milliseconds, and the force required to peel off the sample and rod at that time was measured to determine the welding resistance. In the table, the values are shown relative to the values of Comparative Example 1.
（２）再点弧特性 径30mm、厚さ5mmの円板状接点片、ディマウンタブル
形真空バルブに装着し、6KV×500Aの回路を2000回しゃ
断した時の再点弧発生頻度を測定し、２台のしゃ断器
（バルブとして６本）のばらつき幅（最大および最小）
で示した。接点の装着に際しては、ベーキング加熱（45
0℃、30分）のみ行い、よう材の使用ならびにこれに伴
う加熱は行わなかった。(2) Re-ignition characteristics Measure the frequency of re-ignition when a 6KV x 500A circuit is cut off 2,000 times by attaching it to a disk-shaped contact piece with a diameter of 30mm and a thickness of 5mm and a dismountable vacuum valve. , Variation range (maximum and minimum) of two circuit breakers (six valves)
Indicated by Baking heating (45
(0 ° C., 30 minutes) only, without the use of iodine and the accompanying heating.
［発明の効果］ 上記試験結果からも明らかなように、本発明の固相燒
結品接点と溶浸品接点とを組合せたものは、接点特性と
しての耐溶着性は固相燒結品接点同士を用いたものと比
べてほとんど変らずに、再点弧発生率が著しく減少され
たが、一方溶浸品接点同士を用いたものと比べて耐溶着
性が著しく改善され、なお溶浸品の長所である再点弧発
生率が少ないという長所を保有し、本発明の真空バルブ
は優れた接点特性を有することがわかる。 [Effects of the Invention] As is clear from the above test results, the combination of the solid-state sintered product contact and the infiltrated product contact of the present invention has the welding resistance as a contact characteristic of the solid-state sintered product contact. The rate of occurrence of restriking was significantly reduced with little change compared to the one used, but the welding resistance was significantly improved as compared with the one using the contacts of the infiltrated product. , Which means that the vacuum valve of the present invention has excellent contact characteristics.
フロントページの続き (72)発明者 奥富 功 東京都府中市東芝町１番地 株式会社東 芝府中工場内 (56)参考文献 特開 昭59−60828（ＪＰ，Ａ) 特開 昭60−67631（ＪＰ，Ａ)Continuation of the front page (72) Inventor Isao Okutomi 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Toshiba Fuchu Plant Co., Ltd. (56) References JP-A-59-60828 (JP, A) JP-A-60-67631 (JP) , A)
Claims (1)
Cr系合金からなる接点、他の一方に溶浸法によって製造
されたCu−Cr系合金からなる接点を配したことを特徴と
する真空バルブ。1. One of the methods is to prepare Cu-
A vacuum valve, comprising: a contact made of a Cr-based alloy; and a contact made of a Cu-Cr-based alloy manufactured by an infiltration method on the other side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18565688A JP2645089B2 (en) | 1988-07-27 | 1988-07-27 | Vacuum valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18565688A JP2645089B2 (en) | 1988-07-27 | 1988-07-27 | Vacuum valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0237634A JPH0237634A (en) | 1990-02-07 |
| JP2645089B2 true JP2645089B2 (en) | 1997-08-25 |
Family
ID=16174577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18565688A Expired - Lifetime JP2645089B2 (en) | 1988-07-27 | 1988-07-27 | Vacuum valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2645089B2 (en) |
-
1988
- 1988-07-27 JP JP18565688A patent/JP2645089B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0237634A (en) | 1990-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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| EXPY | Cancellation because of completion of term | ||
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