JPH0158604B2 - - Google Patents
Info
- Publication number
- JPH0158604B2 JPH0158604B2 JP56185795A JP18579581A JPH0158604B2 JP H0158604 B2 JPH0158604 B2 JP H0158604B2 JP 56185795 A JP56185795 A JP 56185795A JP 18579581 A JP18579581 A JP 18579581A JP H0158604 B2 JPH0158604 B2 JP H0158604B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- silver
- contact
- nickel
- resistance
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- PSCIKKFYFNJDPV-UHFFFAOYSA-N [O-2].[In+3].[Sn+2]=O.[Ag+].[O-2].[O-2] Chemical compound [O-2].[In+3].[Sn+2]=O.[Ag+].[O-2].[O-2] PSCIKKFYFNJDPV-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 14
- 238000009413 insulation Methods 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- QGDMNTMSHUSFTE-UHFFFAOYSA-N [Ag].[Ni].[W] Chemical compound [Ag].[Ni].[W] QGDMNTMSHUSFTE-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- ASMQPJTXPYCZBL-UHFFFAOYSA-N [O-2].[Cd+2].[Ag+] Chemical compound [O-2].[Cd+2].[Ag+] ASMQPJTXPYCZBL-UHFFFAOYSA-N 0.000 description 2
- AZWHFTKIBIQKCA-UHFFFAOYSA-N [Sn+2]=O.[O-2].[In+3] Chemical compound [Sn+2]=O.[O-2].[In+3] AZWHFTKIBIQKCA-UHFFFAOYSA-N 0.000 description 2
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 2
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- -1 silver-cadmium oxide-tin oxide-indium oxide Chemical compound 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- OFKLXPIYUOJPPI-UHFFFAOYSA-N nickel;oxosilver Chemical compound [Ni].[Ag]=O OFKLXPIYUOJPPI-UHFFFAOYSA-N 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- IVQODXYTQYNJFI-UHFFFAOYSA-N oxotin;silver Chemical compound [Ag].[Sn]=O IVQODXYTQYNJFI-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
Landscapes
- Contacts (AREA)
Description
本発明は組み合わせ電気接点の改良に関する。
近時、電気、電子技術の発展に伴い各種電気、
電子機器が小型化され、それに応じてブレーカ
ー、マグネツトスイツチ等も小型化されている。
然し乍ら、ブレーカー、マグネツトスイツチ等
が小型化されると、機器の沿面距離や絶縁距離が
とりにくくなる。つまり接点の消耗飛散により絶
縁抵抗や耐電圧が低下するという問題が生じる。
また電気接点の接触力、開離力が小さくなつて、
溶着が起き易くなるという問題がある。
この為、耐消耗性が良く、耐溶着性に優れた組
み合わせ電気接点が要望され、種々の組み合わせ
電気接点の開発がなされているが、今だ満足すべ
きものがない。
従来組み合わせ電気接点には銀中に金属酸化物
を分散した銀―金属酸化物より成る接点が用いら
れその中でも銀―酸化カドミウム―酸化錫―酸化
インジウムより成る接点同志を対向させた組み合
わせ電気接点が耐溶着性が優れる為に多用されて
きた。しかし消耗が多く、その結果として絶縁劣
化を生じ、特に小型継電器への適用がなされなか
つた。一方銀―ニツケル―炭化タングステン接点
は消耗が均一で少なく耐消耗性には優れている
が、銀―ニツケル系に特有の耐溶着性のバラツキ
が生じ開離力の大きくとれない小型継電器へは適
用できなかつた。
このように従来の組み合わせ電気接点は、相対
向する固定接点と可動接点を同じ性質の電気接点
材料を用いていたので、耐溶着性は良いが耐消耗
性が悪かつたり、また逆に耐消耗性は良いが耐溶
着性が悪い等の問題があつた。そこで本発明者
は、小型化されたブレーカー、マグネツトスイツ
チ等に於いても耐消耗性が良くて絶縁抵抗を劣化
させることなく、耐溶着性に優れた組み合わせ電
気接点を開発すべく鋭意攻究の結果、相対向する
固定接点と可動接点に耐消耗性の異なる接点材料
を用いることにより耐溶着性、耐消耗性が向上し
得ることを見い出した。
本発明はこの点に着目してなされたものであ
り、耐溶着性、耐消耗性を確実に向上させること
のできる組み合わせ電気接点として銀―酸化カド
ミウム―酸化錫―酸化インジウム接点と銀―ニツ
ケル、炭化タングステン―（タングステン）系の
接点とを相対向させて成る組み合わせ電気接点を
提供せんとするものである。
本発明による組み合わせ電気接点は、酸化前の
合金組成として、カドミウム２〜８重量％、すず
４〜11重量％、インジウム１〜７重量％及び残部
銀からなる銀―酸化すず―酸化インジウム接点
と、ニツケル10〜60重量％、タングステン又は炭
化タングステンの内の１種又は２種を合計で0.5
〜５重量％及び残部銀からなる銀―ニツケル系の
接点とを相対向させて成るものである。
本発明の組み合わせ電気接点に於いて上記の如
く相対向する接点の材料を限定した理由は、銀―
酸化カドミウム―酸化錫―酸化インジウム系の優
れた耐溶着性を生かし、また銀―ニツケル系の良
好な耐消耗性を生かすため、銀―ニツケル系合金
にタングステン又は炭化タングステンを添加する
ことにより従来の同じ又は性質の似通つた材料の
接点を相対向させた組み合わせ電気接点に於ける
劣悪な耐溶着性或いは耐消耗性に依存する絶縁抵
抗特性の悪さを解消する為である。また銀―酸化
カドミウム一酸化錫―酸化インジウム系のカドミ
ウムの含有量を２〜８重量％としたのは２重量％
未満では耐溶着性が不十分であり８重量％を超え
ると酸化カドミウムの分解による消耗が極端に多
くなるからである。また錫の含有量を４〜11重量
％としたのは４重量％未満では酸化錫の優れた耐
熱性が生かせず11重量％を超えると加工が困難と
なるからである。更にインジウムの含有量を１〜
７重量％としたのはカドミウム及びスズとの複合
酸化物がこの範囲内であれば過不足なく生成して
好影響をもたらすからである。
銀―ニツケル系のニツケルの含有量を10〜60重
量％と限定したのは10重量％以下では耐消耗性が
充分でなく、60重量％を超えると接触抵抗が非常
に不安定になるためである。。またタングステン、
炭化タングステンの１種又は２種を合計で0.5〜
５重量％添加したのは銀―ニツケル合金中のニツ
ケル粒子の凝集を防ぐ他、接点開閉動作のアーク
による消耗の際、炭化タングステンやタングステ
ンが酸化され酸化タングステンとなつて相手方の
銀―酸化すず―酸化インジウム接点との表面ぬれ
性を改善し、耐溶着性の向上がなされるからであ
る。
次に本発明による組み合わせ電気接点の効果を
明瞭ならしめる為にその具体的な実施例と従来例
について説明する。
（実施例 １）
酸化前の合金組成としてCd7重量％、Sn4重量
％、In3重量％及び残部Agから成る直径５mmの
Ag―CdO―SnO2―In2O3固定接点とニツケル25
重量％、炭化タングステン2.5重量％を含む銀―
ニツケル―炭化タングステンより成る直径４mmの
可動接点とを相対向させて組み合わせ電気接点を
構成した。
（実施例 ２）
酸化前の合金組成としてCd8.0重量％、Sn5.5重
量％、In3.0重量％及び残部Agから成る直径５mm
のAg―CdO―SnO―In2O3固定接点とニツケル15
重量％、炭化タングステン１重量％、タングステ
ン0.5重量％を含む銀―ニツケル―炭化タングス
テン―タングステンより成る直径４mmの可動接点
とを相対向させて組み合わせ電気接点を構成し
た。
（従来例 １）
酸化前の合金組成としてCd7重量％、Sn4重量
％、In3重量％及び残部Agから成る直径５mmの
Ag―CdO―SnO2―In2O3固定接点と直径４mmの
可動接点を相対向させて組み合わせ電気接点を構
成した。
（従来例 ２）
ニツケル15重量％、炭化タングステン1.5重量
％を含む銀―ニツケル―炭化タングステンより成
る直径５mmの固定接点と直径４mmの可動接点を相
対向させて組み合わせ電気接点を構成した。
然してこれら各組み合わせ接点を夫々10組下記
の試験条件にて溶着回数、絶縁抵抗、消耗量を測
定したところ下表に示すような結果を得た。
耐溶着性試験条件
・ AC 100V 50Hz
・ 電 流：投入電流40A
遮断電流10A
・ 開閉頻度：20回／分
・ 接 触 力：40g 開離力：40g
絶縁抵抗測定
・ DC500Vメガーによる。
The present invention relates to improvements in combination electrical contacts. Recently, with the development of electrical and electronic technology, various electrical
As electronic devices have become smaller, breakers, magnetic switches, etc. have also become smaller. However, as breakers, magnetic switches, and the like become smaller, it becomes difficult to maintain creepage distances and insulation distances for the devices. In other words, a problem arises in that the insulation resistance and withstand voltage decrease due to wear and tear of the contacts.
In addition, the contact force and opening force of electrical contacts are reduced,
There is a problem that welding easily occurs. For this reason, there is a demand for a combination electrical contact that has good wear resistance and excellent welding resistance, and various combination electrical contacts have been developed, but so far none have been satisfactory. Conventionally, combination electrical contacts have been made of silver-metal oxide, in which metal oxide is dispersed in silver, and among these, combination electrical contacts have been used, in which contacts made of silver, cadmium oxide, tin oxide, and indium oxide are placed facing each other. It has been widely used because of its excellent welding resistance. However, it was subject to a lot of wear and tear, resulting in insulation deterioration, so it was not particularly applicable to small relays. On the other hand, silver-nickel-tungsten carbide contacts wear out uniformly and with little wear, and are excellent in wear resistance, but due to the variation in welding resistance characteristic of the silver-nickel system, they are not suitable for small relays where the opening force cannot be large. I couldn't do it. In this way, conventional combination electrical contacts use electrical contact materials with the same properties for the opposing fixed and movable contacts, so they have good welding resistance but poor abrasion resistance, or conversely, Although the properties were good, there were problems such as poor welding resistance. Therefore, the present inventor has made an earnest effort to develop a combination electrical contact that has good wear resistance, does not deteriorate insulation resistance, and has excellent welding resistance even in miniaturized breakers, magnetic switches, etc. As a result, we have found that welding resistance and wear resistance can be improved by using contact materials with different wear resistance for the fixed and movable contacts that face each other. The present invention has been made with attention to this point, and uses silver-cadmium oxide-tin oxide-indium oxide contacts and silver-nickel oxide contacts as combination electrical contacts that can reliably improve welding resistance and wear resistance. It is an object of the present invention to provide a combination electrical contact formed by opposing a tungsten carbide-based contact. The combined electrical contact according to the present invention includes a silver-tin oxide-indium oxide contact consisting of an alloy composition of 2 to 8% by weight of cadmium, 4 to 11% by weight of tin, 1 to 7% by weight of indium, and the balance silver; 10 to 60% by weight of nickel, one or two of tungsten or tungsten carbide, total 0.5%
A silver-nickel type contact consisting of ~5% by weight and the balance being silver is placed opposite to each other. The reason for limiting the materials of the opposing contacts as described above in the combination electrical contact of the present invention is that
In order to take advantage of the excellent welding resistance of the cadmium oxide-tin oxide-indium oxide system and the good abrasion resistance of the silver-nickel system, we added tungsten or tungsten carbide to the silver-nickel system to improve the conventional This is to eliminate poor insulation resistance characteristics that depend on poor welding resistance or abrasion resistance in combination electrical contacts in which contacts made of the same or similar materials are placed opposite each other. In addition, the content of cadmium in the silver-cadmium oxide, tin monoxide-indium oxide system is 2 to 8% by weight, which is 2% by weight.
If it is less than 8% by weight, the welding resistance is insufficient, and if it exceeds 8% by weight, consumption due to decomposition of cadmium oxide becomes extremely large. The tin content is set to 4 to 11% by weight because if it is less than 4% by weight, the excellent heat resistance of tin oxide cannot be utilized, and if it exceeds 11% by weight, processing becomes difficult. Furthermore, the indium content is 1~
The reason why the amount is set at 7% by weight is that if the composite oxide with cadmium and tin is within this range, it will be produced in just the right amount and have a favorable effect. The reason why the content of nickel in the silver-nickel system was limited to 10 to 60% by weight is that if it is less than 10% by weight, the abrasion resistance is insufficient, and if it exceeds 60% by weight, the contact resistance becomes extremely unstable. be. . Also tungsten,
One or two types of tungsten carbide in total of 0.5~
The addition of 5% by weight not only prevents the agglomeration of nickel particles in the silver-nickel alloy, but also oxidizes tungsten carbide and tungsten to tungsten oxide when they are consumed by the arc of the contact opening and closing operation, and removes its counterpart silver-tin oxide. This is because surface wettability with indium oxide contacts is improved, and welding resistance is improved. Next, in order to clarify the effects of the combined electrical contact according to the present invention, specific embodiments and conventional examples thereof will be described. (Example 1) The alloy composition before oxidation is 7% by weight of Cd, 4% by weight of Sn, 3% by weight of In, and the balance is Ag.
Ag―CdO―SnO 2 ―In 2 O 3 fixed contact and Nickel 25
% by weight, silver containing 2.5% by weight of tungsten carbide.
An electric contact was constructed by combining a movable contact made of nickel and tungsten carbide with a diameter of 4 mm and facing each other. (Example 2) The alloy composition before oxidation is 8.0% by weight of Cd, 5.5% by weight of Sn, 3.0% by weight of In, and the balance is Ag, with a diameter of 5 mm.
Ag-CdO- SnO - In2O3 fixed contact and Nickel 15
An electric contact was constructed by combining a movable contact with a diameter of 4 mm made of silver-nickel-tungsten carbide-tungsten containing 1% by weight of tungsten carbide and 0.5% by weight of tungsten and facing each other. (Conventional Example 1) The alloy composition before oxidation is 7% by weight of Cd, 4% by weight of Sn, 3% by weight of In, and the balance is Ag.
An electric contact was constructed by combining an Ag-CdO-SnO 2 -In 2 O 3 fixed contact and a movable contact with a diameter of 4 mm facing each other. (Conventional Example 2) An electric contact was constructed by combining a fixed contact with a diameter of 5 mm and a movable contact with a diameter of 4 mm, which were made of silver-nickel-tungsten carbide containing 15% by weight of nickel and 1.5% by weight of tungsten carbide, and facing each other. When we measured the number of welds, insulation resistance, and amount of wear on 10 sets of each of these combinations of contacts under the test conditions below, we obtained the results shown in the table below. Welding resistance test conditions AC 100V 50Hz Current: Closing current 40A Breaking current 10A Switching frequency: 20 times/minute Contact force: 40g Breaking force: 40g Insulation resistance measurement - DC500V megger.
【表】
上記表で明らかなように銀―酸化カドミウム―
酸化錫―酸化インジウム系の接点と銀―ニツケル
―炭化タングステン―（タングステン）の接点を
相対向させた本発明の組み合わせ電気接点は、そ
れぞれ単独で組み合わせて用いたときの欠点を補
い合い。しかも長所をのばす、すなわち耐溶着
性、耐消耗性両者の優れた組み合わせ電気接点で
ある。
本発明の組み合わせ接点を用いれば、小型化さ
れたブレーカー、マグネツトスイツチ、リレー等
の過酷な使用条件に対応できるものである。[Table] As is clear from the table above, silver - cadmium oxide -
The combination electrical contact of the present invention, which has a tin oxide-indium oxide contact and a silver-nickel-tungsten carbide (tungsten) contact facing each other, compensates for the drawbacks when used alone and in combination. Moreover, it is an electrical contact that has a combination of excellent adhesion resistance and abrasion resistance. By using the combination contact of the present invention, it is possible to cope with severe usage conditions of miniaturized breakers, magnetic switches, relays, etc.
Claims (1)
８重量％、すず４〜11重量％、インジウム１〜７
重量％及び残部銀からなる銀―酸化すず―酸化イ
ンジウム接点と、ニツケル10〜60重量％、タング
ステン及び炭化タングステンの内の１種又は２種
を合計で0.5〜５重量％及び残部銀からなる銀―
ニツケル系の接点とを相対向させて成る組み合わ
せ電気接点。1 As the alloy composition ratio before oxidation, cadmium 2~
8% by weight, tin 4-11% by weight, indium 1-7
A silver-tin oxide-indium oxide contact consisting of 10-60% by weight of nickel, 0.5-5% by weight of one or two of tungsten and tungsten carbide and the balance of silver. ―
A combination electrical contact consisting of nickel-based contacts facing each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18579581A JPS5887713A (en) | 1981-11-19 | 1981-11-19 | Combination electric contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18579581A JPS5887713A (en) | 1981-11-19 | 1981-11-19 | Combination electric contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5887713A JPS5887713A (en) | 1983-05-25 |
| JPH0158604B2 true JPH0158604B2 (en) | 1989-12-12 |
Family
ID=16177017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18579581A Granted JPS5887713A (en) | 1981-11-19 | 1981-11-19 | Combination electric contacts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5887713A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616299U (en) * | 1992-08-03 | 1994-03-01 | 宣司 阿久津 | Next mouth |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138044A (en) * | 1979-04-13 | 1980-10-28 | Matsushita Electric Works Ltd | Electric contact material |
| JPS5654712A (en) * | 1979-10-11 | 1981-05-14 | Tanaka Precious Metal Ind | Combination electric contact |
-
1981
- 1981-11-19 JP JP18579581A patent/JPS5887713A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55138044A (en) * | 1979-04-13 | 1980-10-28 | Matsushita Electric Works Ltd | Electric contact material |
| JPS5654712A (en) * | 1979-10-11 | 1981-05-14 | Tanaka Precious Metal Ind | Combination electric contact |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5887713A (en) | 1983-05-25 |
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