EP0116837B1 - Contact arrangement for vacuum switch - Google Patents
Contact arrangement for vacuum switch Download PDFInfo
- Publication number
- EP0116837B1 EP0116837B1 EP84100246A EP84100246A EP0116837B1 EP 0116837 B1 EP0116837 B1 EP 0116837B1 EP 84100246 A EP84100246 A EP 84100246A EP 84100246 A EP84100246 A EP 84100246A EP 0116837 B1 EP0116837 B1 EP 0116837B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- cup
- contact arrangement
- arrangement
- condensation plate
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6646—Contacts; Arc-extinguishing means, e.g. arcing rings having non flat disc-like contact surface
Definitions
- the invention relates to a contact arrangement for vacuum switches with contacts that are movable relative to one another in their axial direction, of which the first is designed as a pot contact, the side wall of which the internal height is greater than the contact stroke of the contacts partially surrounds the second contact to form an annular gap .
- the quenching chamber of larger vacuum switches is generally provided with at least one so-called steam shield, which, however, makes the switch more expensive and enlarges the quenching chamber accordingly.
- a diffuse metal vapor arc is obtained, the operating voltage of which is only about 20 to 50 V due to the low field strength in the plasma.
- the arc load of such contacts, between which a diffuse arc burns, is therefore relatively low during the extinguishing process.
- the switching tasks of the switching tubes for relatively low switching capacity can therefore be fulfilled by means of disc contacts with flat or slightly curved contact contact surfaces. Since metal particles and, in the case of a narrow contact gap, the metal vapor are predominantly emitted radially to the contact contact surface, the erosion products reach the housing of the arcing chamber in the shortest possible way. Some of these erosion products are deposited in a relatively narrow, ring-shaped wall zone that concentrically surrounds the gap between the open contacts.
- the thermal load in this zone is accordingly high.
- Another part of the metal vapor emerging from the contact gap is reflected at least once on the housing wall and can thus also reach switch parts that are not directly connected to the metal vapor.
- the invention is therefore based on the object of preventing an unfavorable effect of the erosion products on the switch properties in a vacuum switch for high switching numbers and relatively low switching power. At the same time, the erosion behavior of the switch should be improved and the switch should also have a simple structure and a small size.
- one of the two coaxially arranged contacts as a pot contact in vacuum switches with so-called axial field contacts, the inside of its side wall, which widens conically towards the edge, overlaps the other contact, whose outer side also widens conically.
- the opening angle of the pot contact is chosen to be smaller than the opening angle of the other contact, so that when the contacts are closed there is an annular contact contact surface between the conical surface parts and an arc is drawn there when the contacts are opened.
- the arc is supposed to rotate in a radial plane between the conical surfaces due to magnetic force (DE-A-2 925 189).
- the contact contact surfaces are formed in a flat central area at the bottom of the pot contact and on the free end face of the other contact.
- Such a known contact arrangement for vacuum switches contains pot contacts in which the side wall of the first contact, the bottom of which serves as the contact contact surface, at least partially encloses the second contact, the end face of which forms the contact contact surface.
- Magnetic forces are intended to drive the arc radially outward between the concentric side walls of the contacts, the surfaces of which face one another and serve as areas of erosion (DE-A-2 546 376).
- the above object is achieved according to the invention in a contact arrangement of the type mentioned by the features of the characterizing part of the patent claim.
- the contact arrangement is fed through the side wall of the pot contact, which acts as a metal vapor guide ring, the major part of the metal vapor to the free outer surface of the condensation plate, where it can condense.
- the condensation plate can be provided with a groove structure.
- the end face facing the second contact can be designed such that it forms a nozzle-profile-like annular gap with the facing part of the free surface of the first contact and the condensation plate.
- the vapor exit angle can be selected so that even with a single reflection of a certain number of metal atoms on the condensation plate, no insulation parts are reached from the metal vapor.
- a pot contact is designated 2, the side wall 4 bil a metal vapor guide ring det and in which the free end face of the bottom 6 serves as a contact support surface.
- the pot contact 2 is relatively movable with the aid of a power supply 8 to a further contact 12 which is designed as a disk-shaped flat contact and whose free end face forms the contact contact surface.
- a disk-shaped condensation plate 16 is provided, which consists of a good heat-conducting material, preferably copper or also a chromium-copper alloy, and whose diameter D is substantially larger than the inner diameter d of the pot contact 2.
- a power supply 18 for the contact 12 is attached to the condensation plate 16. However, it can also be connected to the housing 14 of the vacuum chamber.
- a particularly advantageous embodiment of the contact arrangement is obtained in that the condensation plate 16 is provided with grooves 22 on its free surface projecting beyond the contact 12, the width b of which can be chosen to be smaller than its distance a and also smaller than its depth t. These grooves 22 enlarge the condensation area. They also reduce the part of the material reflected in the arcing chamber because the material reflected within a groove hits the opposite groove wall.
- the groove structure is preferably designed such that the ratio of groove width b to groove spacing a is approximately 0.2 to 0.8.
- a particularly favorable effect on the metal vapor flow during the extinguishing process is obtained if the height of the side wall 4 inside the pot contact 2 is at least 1.5 times the contact stroke h. However, this height s of the side wall 4 will generally not substantially exceed twice the contact stroke, so that the flow of the metal vapor is not excessively impeded. Due to the deflecting effect of the side wall 4 as a metal vapor guide ring, the plasma jets and metal vapors produced during the extinguishing process are fed to the condensation plate 16 and can thus condense in the vicinity of the contact.
- the diameter D of the condensation plate 16 is preferably selected such that metal vapor radiated in the direction indicated by a dash-dotted line 23 still occurs on the free surface of the condensation plate 16. This direction results from the connecting line between the outer edge of the contact 12 and the inner edge of the side wall 4 of the pot contact 2. An additional steam shield to protect an insulator of the housing 14, not shown in the figure, is therefore not necessary.
- the contact arrangement shown in FIG. 2 contains a flat pot contact 3, the inner surface of which is rounded at the transition between the central and unspecified contact contact surface and the edge of the side wall 5.
- the narrow surface of the flat contact 13 is inclined such that an annular gap 24 with an outflow-favorable nozzle profile is formed between the side wall 5 of the cup contact 3 and the flat contact 13.
- the impediment to the metal vapor flow through the metal vapor guide ring of the pot contact 3 is correspondingly low.
Description
Die Erfindung bezieht sich auf eine Kontaktanordnung für Vakuumschalter mit in ihrer Achsrichtung relativ zueinander beweglichen Kontakten, von denen der erste als Topfkontakt gestaltet ist, dessen Seitenwand, deren innere Höhe grösser ist als der Kontakthub der Kontakte, den zweiten Kontakt unter Bildung eines Ringspaltes teilweise umgibt.The invention relates to a contact arrangement for vacuum switches with contacts that are movable relative to one another in their axial direction, of which the first is designed as a pot contact, the side wall of which the internal height is greater than the contact stroke of the contacts partially surrounds the second contact to form an annular gap .
Beim Öffnen der Kontakte unter Strombelastung wird nach der galvanischen Trennung der Kontakte ein Lichtbogen gezündet, der zunächst an der letzten metallischen Berührungsstelle entsteht und sich dann im Spalt zwischen den Kontakten ausbreitet. Der zum Stromtransport notwendige Metalldampf wird in einer Vielzahl von Kathodenflecken erzeugt, die auf der negativen Elektrode entstehen. Um einen Niederschlag der Erosionsprodukte, nämlich Metalldampf und Metallpartikel, am Isolationskörper des Schaltergehäuses zu verhindern, ist die Löschkammer von grösseren Vakuumschaltern im allgemeinen mit wenigstens einem sogenannten Dampfschirm versehen, der jedoch den Schalter verteuert und die Löschkammer entsprechend vergrössert.When the contacts are opened under current load, an arc is ignited after the galvanic isolation of the contacts, which arises initially at the last metallic contact point and then spreads in the gap between the contacts. The metal vapor necessary for the transport of electricity is generated in a large number of cathode spots that form on the negative electrode. In order to prevent precipitation of the erosion products, namely metal vapor and metal particles, on the insulation body of the switch housing, the quenching chamber of larger vacuum switches is generally provided with at least one so-called steam shield, which, however, makes the switch more expensive and enlarges the quenching chamber accordingly.
Bis zu Strömen von etwa 10 kA erhält man einen diffusen Metalldampflichtbogen, dessen Brennspannung wegen der niedrigen Feldstärke im Plasma nur etwa 20 bis 50 V beträgt. Die Lichtbogenbelastung derartiger Kontakte, zwischen denen ein diffuser Lichtbogen brennt, ist daher beim Löschvorgang verhältnismässig gering. Die Schaltaufgaben der Schaltröhren für verhältnismässig geringe Schaltleistung lassen sich deshalb durch Scheibenkontakte mitflacher oder geringfügig gewölbter Kontaktauflagefläche erfüllen. Da Metallpartikel und bei engem Kontaktspalt auch der Metalldampf vorwiegend radial zur Kontaktauflagefläche emittiert werden, erreichen die Erosionsprodukte auf dem kürzesten Wege das Gehäuse der Löschkammer. Diese Erosionsprodukte lagern sich zum Teil in einer verhältnismässig schmalen, ringförmigen Wandzone ab, die den Spalt zwischen den geöffneten Kontakten konzentrisch umgibt. Die thermische Belastung dieser Zone ist somit entsprechend hoch. Bei steigender Dicke der Ablagerungsschicht besteht die Gefahr, dass sich Teile der Schicht infolge thermischer Spannungen ablösen und den Vakuumschalter unbrauchbar machen. Ein weiterer Teil des aus dem Kontaktspalt austretenden Metalldampfes wird mindestens einmal an der Gehäusewand reflektiert und kann damit auch Schalterteile erreichen, die nicht am direkten Wege des Metalldampfes liegen.Up to currents of about 10 kA, a diffuse metal vapor arc is obtained, the operating voltage of which is only about 20 to 50 V due to the low field strength in the plasma. The arc load of such contacts, between which a diffuse arc burns, is therefore relatively low during the extinguishing process. The switching tasks of the switching tubes for relatively low switching capacity can therefore be fulfilled by means of disc contacts with flat or slightly curved contact contact surfaces. Since metal particles and, in the case of a narrow contact gap, the metal vapor are predominantly emitted radially to the contact contact surface, the erosion products reach the housing of the arcing chamber in the shortest possible way. Some of these erosion products are deposited in a relatively narrow, ring-shaped wall zone that concentrically surrounds the gap between the open contacts. The thermal load in this zone is accordingly high. As the thickness of the deposit layer increases, there is a risk that parts of the layer become detached as a result of thermal stresses and make the vacuum switch unusable. Another part of the metal vapor emerging from the contact gap is reflected at least once on the housing wall and can thus also reach switch parts that are not directly connected to the metal vapor.
Der Erfindung liegt deshalb die Aufgabe zugrunde, bei einem Vakuumschalter für hohe Schaltzahlen und verhältnismässig geringe Schaltleistung eine un--günstige Wirkung der Erosionsprodukte auf die Schaltereigenschaften zu verhindern. Zugleich soll das Abbrandverhalten des Schalters verbessert werden und ausserdem soll der Schalter einen einfachen Aufbau und eine geringe Grösse haben.The invention is therefore based on the object of preventing an unfavorable effect of the erosion products on the switch properties in a vacuum switch for high switching numbers and relatively low switching power. At the same time, the erosion behavior of the switch should be improved and the switch should also have a simple structure and a small size.
Es ist bereits bekannt, bei Vakuumschaltern mit sogenannten Axialfeldkontakten einen der beiden koaxial zueinander angeordneten Kontakte als Topfkontakt zu gestalten, dessen zum Rand sich konisch erweiternde Innenseite seiner Seitenwand über den anderen Kontakt, dessen Aussenseite sich ebenfalls konisch erweitert, übergreift. Der Öffnungswinkel des Topfkontaktes ist kleiner gewählt als der Öffnungswinkel des anderen Kontaktes, so dass sich bei geschlossenen Kontakten eine ringförmige Kontaktauflagefläche zwischen den konischen Oberflächenteilen ergibt und dort beim Öffnen der Kontakte ein Lichtbogen gezogen wird. Durch diese Gestaltung soll der Lichtbogen aufgrund magnetischer Kraftwirkung zwischen den konischen Oberflächen in einer radialen Ebene rotieren (DE-A-2 925 189).It is already known to design one of the two coaxially arranged contacts as a pot contact in vacuum switches with so-called axial field contacts, the inside of its side wall, which widens conically towards the edge, overlaps the other contact, whose outer side also widens conically. The opening angle of the pot contact is chosen to be smaller than the opening angle of the other contact, so that when the contacts are closed there is an annular contact contact surface between the conical surface parts and an arc is drawn there when the contacts are opened. With this design, the arc is supposed to rotate in a radial plane between the conical surfaces due to magnetic force (DE-A-2 925 189).
Demgegenüber werden in einer Kontaktanordnung der eingangs genannten Art mit sogenannten Flachkontakten die Kontaktauflageflächen in einem ebenen zentralen Bereich am Boden des Topfkontaktes und an der freien Stirnseite des anderen Kontaktes gebildet.In contrast, in a contact arrangement of the type mentioned at the beginning with so-called flat contacts, the contact contact surfaces are formed in a flat central area at the bottom of the pot contact and on the free end face of the other contact.
Eine derartige bekannte Kontaktanordnung für Vakuumschalter enthält Topfkontakte, bei denen die Seitenwand des ersten Kontaktes, dessen Boden als Kontaktauflagefläche dient, den zweiten Kontakt, dessen Strirnfläche die Kontaktauflagefläche bildet, wenigstens teilweise umschliesst. Durch magnetische Kräfte soll der Lichtbogen radial nach aussen zwischen die konzentrischen Seitenwände der Kontakte getrieben werden, deren einander zugewandte Oberflächen als Abbrandbereiche dienen (DE-A-2 546 376). Bei diesen bekannten Vakuumschaltern können sich somit die Erosionsprodukte des Lichtbogens nahezu ungehindert in das Gehäuse des Schalters ausbreiten.Such a known contact arrangement for vacuum switches contains pot contacts in which the side wall of the first contact, the bottom of which serves as the contact contact surface, at least partially encloses the second contact, the end face of which forms the contact contact surface. Magnetic forces are intended to drive the arc radially outward between the concentric side walls of the contacts, the surfaces of which face one another and serve as areas of erosion (DE-A-2 546 376). With these known vacuum switches, the erosion products of the arc can thus spread almost unhindered into the housing of the switch.
Die oben genannte Aufgabe ist erfindungsgemäss bei einer Kontaktanordnung der eingangs genannten Art durch die Merkmale des kennzeichnenden Teiles des Patentanspruches gelöst. In der dort angegebenen Gestaltung dek Kontaktanordnung wird durch die Seitenwand des Topfkontaktes, der als Metalldampfleitring wirkt, der überwiegende Teil des Metalldampfes der freien Onerfläche der Kondensationsplatte zugeleitet, wo er kondensieren kann.The above object is achieved according to the invention in a contact arrangement of the type mentioned by the features of the characterizing part of the patent claim. In the design specified there, the contact arrangement is fed through the side wall of the pot contact, which acts as a metal vapor guide ring, the major part of the metal vapor to the free outer surface of the condensation plate, where it can condense.
In einer vorzugsweisen Ausführungsform der Kontaktanordnung kann die Kondensationsplatte mit einer Rillenstruktur versehen sein. In einer anderen Ausführungsform kann die dem zweiten Kontakt zugewandte Stirnfläche so gestaltet sein, dass sie mit dem zugewandten Teil der freien Oberfläche des ersten Kontaktes und der Kondensationsplatte einen düsenprofilartigen Ringspalt bildet. Der Dampfaustrittswinkel kann in beiden Fällen so gewählt werden, dass selbst bei einmaliger Reflexion einer gewissen Zahl von Metallatomen an der Kondensationsplatte vom Metalldampf keine Isolationsteile erreicht werden.In a preferred embodiment of the contact arrangement, the condensation plate can be provided with a groove structure. In another embodiment, the end face facing the second contact can be designed such that it forms a nozzle-profile-like annular gap with the facing part of the free surface of the first contact and the condensation plate. In both cases, the vapor exit angle can be selected so that even with a single reflection of a certain number of metal atoms on the condensation plate, no insulation parts are reached from the metal vapor.
Zur weiteren Erläuterung wird auf die Zeichnung Bezug genommen, in der Ausführungsbeispiele der erfindungsgemässen Kontaktanordnung schematisch veranschaulicht sind. Es zeigen jeweils als Schnittbild
- Fig. 1 einen Teil eines Vakuumschalters mit einer Kontaktanordnung nach der Erfindung und
Figur 2 eine besondere Gestaltungsform der Kontakte.
- Fig. 1 shows a part of a vacuum switch with a contact arrangement according to the invention and
- Figure 2 shows a special design of the contacts.
In Figur 1 ist ein Topfkontakt mit 2 bezeichnet, dessen Seitenwand 4 einen Metalldampfleitring bildet und bei dem die freie Stirnfläche des Bodens 6 als Kontaktauflagefläche dient. Der Topfkontakt 2 ist mit Hilfe einer Stromzuführung 8 relativ beweglich zu einem weiteren Kontakt 12, der als scheibenförmiger Flachkontakt gestaltet ist und dessen freie Stirnfläche die Kontaktauflagefläche bildet. Zwischen diesem Kontakt 12 und einem vorzugsweise metallischen Teil eines Gehäuses 14 ist eine scheibenförmige Kondensationsplatte 16 vorgesehen, die aus einem gut wärmeleitenden Material, vorzugsweise Kupfer oder auch einer Chrom-Kupfer-Legierung, besteht und deren Durchmesser D wesentlich grösser ist als der innere Durchmesser d des Topfkontaktes 2. Eine Stromzuführung 18 für den Kontakt 12 ist an der Kondensationsplatte 16 befestigt. Sie kann jedoch auch mit dem Gehäuse 14 der Vakuumkammer verbunden sein.In Figure 1, a pot contact is designated 2, the side wall 4 bil a metal vapor guide ring det and in which the free end face of the
Eine besonders vorteilhafte Ausführungsform der Kontaktanordnung erhält man dadurch, dass die Kondensationsplatte 16 an ihrer über den Kontakt 12 hinausragenden freien Oberfläche mit Rillen 22 versehen ist, deren Breite b kleiner als ihr Abstand a und auch kleiner als ihre Tiefe t gewählt werden kann. Diese Rillen 22 vergrössern die Kondensationsfläche. Sie vermindern ausserdem den Teil des in die Löschkammer reflektierten Materials, weil das innerhalb einer Rille reflektierte Material auf der gegenüberliegenden Rillenwand auftrifft. Die Rillenstruktur ist vorzugsweise so gestaltet, dass das Verhältnis von Rillenbreite b zum Rillenabstand a etwa 0,2 bis 0,8 beträgt.A particularly advantageous embodiment of the contact arrangement is obtained in that the
Eine besonders günstige Wirkung auf die Metalldampfströmung beim Löschvorgang erhält man, wenn die Höhe der Seitenwand 4 im Inneren des Topfkontaktes 2 wenigstens das 1,5fache des Kontakthubs h beträgt. Diese Höhe s der Seitenwand 4 wird jedoch im allgemeinen den zweifachen Kontakthub nicht wesentlich überschreiten, damit die Strömung des Metalldampfes nicht zu stark behindert wird. Durch die umlenkende Wirkung der Seitenwand 4 als Metalldampfleitring werden die beim Löschvorgang entstehenden Plasmastrahlen und Metalldämpfe der Kondensationsplatte 16 zugeführt und können somit in Kontaktnähe kondensieren. Der Durchmesser D der Kondensationsplatte 16 wird vorzugsweise so gewählt werden, dass in der durch eine strichpunktierte Linie 23 angedeuteten Richtung abgestrahlter Metalldampf noch auf die freie Oberfläche der Kondensationsplatte 16 auftritt. Diese Richtung ergibt sich aus der Verbindungslinie zwischen dem äusseren Rand des Kontaktes 12 und dem inneren Rand der Seitenwand 4 des Topfkontaktes 2. Ein zusätzlicher Dampfschirm zum Schutze eines in der Figur nicht dargestellten Isolators des Gehäuses 14 ist somit nicht erforderlich.A particularly favorable effect on the metal vapor flow during the extinguishing process is obtained if the height of the side wall 4 inside the
In einer besonderen, in Fig. 2 gezeigten Ausführungsform der Kontaktanordnung, enthält diese einen flachen Topfkontakt 3, dessen innere Oberfläche am Übergang zwischen der zentralen und nicht näher bezeichneten Kontaktauflagefläche und dem Rand der Seitenwand 5 abgerundet ist. Die Schmalfläche des flachen Kontaktes 13 ist derart geneigt, dass zwischen der Seitenwand 5 des Topfkontaktes 3 und dem flachen Kontakt 13 ein Ringspalt 24 mit einem abströmgünstigen Düsenprofil entsteht. In dieser Ausführungsform der Kontaktanordnung ist die Behinderung der Metalldampfströmung durch den Metalldampfleitring des Topfkontaktes 3 entsprechend gering.In a special embodiment of the contact arrangement shown in FIG. 2, it contains a flat pot contact 3, the inner surface of which is rounded at the transition between the central and unspecified contact contact surface and the edge of the
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833302201 DE3302201A1 (en) | 1983-01-24 | 1983-01-24 | CONTACT ARRANGEMENT FOR VACUUM SWITCHES |
| DE3302201 | 1983-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0116837A1 EP0116837A1 (en) | 1984-08-29 |
| EP0116837B1 true EP0116837B1 (en) | 1987-01-07 |
Family
ID=6189038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84100246A Expired EP0116837B1 (en) | 1983-01-24 | 1984-01-11 | Contact arrangement for vacuum switch |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4542266A (en) |
| EP (1) | EP0116837B1 (en) |
| JP (1) | JPS59141126A (en) |
| DE (2) | DE3302201A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3701759A1 (en) * | 1987-01-22 | 1988-08-04 | Calor Emag Elektrizitaets Ag | Contact arrangement for a vacuum switch |
| US4797522A (en) * | 1988-02-11 | 1989-01-10 | Westinghouse Electric Corp. | Vacuum-type circuit interrupter |
| DE4128798A1 (en) * | 1991-08-27 | 1992-04-02 | Slamecka Ernst | Vacuum switch for medium-HV network - consists of two part switching housing with metallic electrically conducting and electrically insulating material |
| DE19503347A1 (en) * | 1995-02-02 | 1996-08-08 | Abb Patent Gmbh | Shielding element surrounding the contact point of a vacuum switch |
| DE19639064C2 (en) * | 1996-09-16 | 2001-05-31 | Eaw Relaistechnik Gmbh | Electromagnetically operated, three-pole symmetrical contactor |
| KR100315590B1 (en) * | 1997-11-19 | 2002-02-28 | 니시무로 타이죠 | Joint structure of dissimilar metal materials |
| JP2000113778A (en) * | 1998-10-06 | 2000-04-21 | Mitsubishi Electric Corp | Permanent current switch |
| JP2000268684A (en) * | 1999-03-18 | 2000-09-29 | Mitsubishi Electric Corp | Switchgear |
| JP4818530B2 (en) † | 2001-04-19 | 2011-11-16 | 三菱電機株式会社 | Vacuum valve |
| JP5197065B2 (en) * | 2008-02-26 | 2013-05-15 | 株式会社東芝 | Vacuum valve |
| DE102018200450A1 (en) * | 2018-01-12 | 2019-07-18 | Siemens Aktiengesellschaft | Vacuum interrupter |
| CN109326485B (en) * | 2018-09-13 | 2020-03-17 | 西安交通大学 | Arc extinguish chamber contact structure and method for determining transient voltage waveform of synthetic test loop |
| US11694864B2 (en) | 2020-09-30 | 2023-07-04 | Eaton Intelligent Power Limited | Vacuum interrupter with trap for running cathode tracks |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3366762A (en) * | 1965-04-16 | 1968-01-30 | Gen Electric | Arc controlling electrodes for switches and gaps |
| DE2048506C3 (en) * | 1970-10-02 | 1978-09-28 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Vacuum switch |
| DD96801A1 (en) * | 1971-11-27 | 1973-04-12 | ||
| CH554067A (en) * | 1973-09-19 | 1974-09-13 | Sprecher & Schuh Ag | ARC ELECTRODE, IN PARTICULAR FOR A CONTACT ARRANGEMENT IN A VACUUM SWITCH. |
| US3996437A (en) * | 1973-12-03 | 1976-12-07 | Cutler-Hammer, Inc. | Vacuum contactor for motor control and method of making |
| DD117140A1 (en) * | 1974-12-20 | 1975-12-20 | ||
| US4249050A (en) * | 1977-12-30 | 1981-02-03 | Tokyo Shibaura Denki Kabushiki Kaisha | Vacuum switch |
| DE2925189C2 (en) * | 1979-06-22 | 1983-11-10 | Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen | Multipole vacuum switch |
| JPS633067Y2 (en) * | 1980-11-05 | 1988-01-26 |
-
1983
- 1983-01-24 DE DE19833302201 patent/DE3302201A1/en not_active Withdrawn
-
1984
- 1984-01-11 DE DE8484100246T patent/DE3461965D1/en not_active Expired
- 1984-01-11 EP EP84100246A patent/EP0116837B1/en not_active Expired
- 1984-01-20 US US06/572,725 patent/US4542266A/en not_active Expired - Lifetime
- 1984-01-23 JP JP59009937A patent/JPS59141126A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3461965D1 (en) | 1987-02-12 |
| DE3302201A1 (en) | 1984-07-26 |
| EP0116837A1 (en) | 1984-08-29 |
| JPS59141126A (en) | 1984-08-13 |
| US4542266A (en) | 1985-09-17 |
| JPH0137821B2 (en) | 1989-08-09 |
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