EP0939966A1 - Electromagnetic switching device - Google Patents

Electromagnetic switching device

Info

Publication number
EP0939966A1
EP0939966A1 EP97949883A EP97949883A EP0939966A1 EP 0939966 A1 EP0939966 A1 EP 0939966A1 EP 97949883 A EP97949883 A EP 97949883A EP 97949883 A EP97949883 A EP 97949883A EP 0939966 A1 EP0939966 A1 EP 0939966A1
Authority
EP
European Patent Office
Prior art keywords
yoke
magnet system
switching device
armature
contact
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.)
Granted
Application number
EP97949883A
Other languages
German (de)
French (fr)
Other versions
EP0939966B1 (en
Inventor
Hans Pfab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0939966A1 publication Critical patent/EP0939966A1/en
Application granted granted Critical
Publication of EP0939966B1 publication Critical patent/EP0939966B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact

Definitions

  • the invention relates to an electromagnetic
  • Switchgear with a magnet system comprising an armature and a yoke, with movable contact parts held in a movable contact carrier, which form opener and closer contacts with fixed contact parts, the yoke being elastically suspended in the closing direction of the magnet system and at a distance w from the armature in the exhibition lies.
  • a generic switching device is known from EP 0 358 050 B1.
  • the contact carrier is elastically connected to the armature in such a way that further movement of the armature is possible without actuation of the normally open contact when the normally closed contact is welded.
  • the magnet system here has a yoke that is elastically suspended in the closing direction of the magnet system.
  • This elastic suspension, the elastic connection between the armature and the contact carrier and the elasticity of the movable contact parts are coordinated with one another in such a way that the deflection paths of the armature and yoke are approximately the same size when the normally closed contact and the closed magnet system are welded together. In this way, when opening contacts are welded, the magnet system is closed to prevent the magnet coil from burning out.
  • the armature is elastically connected to the contact carrier via a relatively long leaf spring, which however takes up a lot of space in the housing of the switching device.
  • the invention has for its object to provide an electromagnetic switching device of the type mentioned above, with which the conditions for positively driven contacts in the event of a malfunction are easily complied with in accordance with the regulations of the professional association.
  • the object is achieved by such a design of the elastic suspension of the yoke, which, after switching on the magnet system with a welded opener contact, allows the yoke to move until the magnet system closes, the elastic mounting being realized by a conical spring inserted between the yoke and a coil body and the maximum pressure x of the conical spring in the OFF position is at least as large as the distance w reduced by the opening pressure d.
  • the contact carrier is connected to the armature by a leaf spring in a narrowed area, and the narrowed area forms cavities in the switchgear housing in which there are back pressure springs acting on the contact carrier.
  • FIG. 1 shows the switching device according to the invention in a schematic illustration in side view in section in the OFF representation
  • FIG. 2 shows the switching device according to FIG. 1 in the normal ON position
  • FIG. 3 in the ON position with a welded break contact.
  • the electromagnetic switching device 1 shows an electromagnetic switching device 1 in the OFF position with a housing 2 indicated here in principle, in which a contact carrier 3 is displaceably guided. Furthermore, the electromagnetic switching device 1 comprises a magnet system which comprises an armature 4, a yoke 5 and a coil with a coil body 6. Contact bridges 8 are held in the contact carrier 3 by means of contact pressure springs, which, together with the contacts (not shown here) connected to them, form movable contact parts. the. These form normally open contacts 9 and normally open contacts 10 with fixed contact parts, also not shown here. The armature 4 and the contact carrier 3 are connected to one another via a relatively rigid leaf spring 11.
  • connection is almost inelastic, so that a relative movement of the armature 4 to the contact carrier 3 in the closing direction has negligible importance for the function in operation.
  • the leaf spring 11 is guided through an opening 12 in the armature 4 and is supported with its ends in recesses 13 of the contact carrier 3. These recesses 13 are located on the side facing the coil former 6 in the formations 14 of the contact carrier 3, which form a region which is narrower than the other width of the contact carrier 3. This results in two cavities 15 towards the housing 2, in which two back pressure springs 16 are held to hold the contact carrier 3 in the OFF position.
  • the yoke 5 is mounted on the bottom 17 of the housing 2, it being held by a conical spring 18 which is supported on the coil former 6.
  • the armature 4 and the yoke 5 are at a distance w, the so-called magnetic path, from one another.
  • the spring-elastic mounting of the yoke 5 enables its movement in the closing direction, which apart from the distance w from the armature 4 is limited by the dimension x, ie the maximum possible compression of the conical spring 18 to a block dimension.
  • the armature 4 moves from the position shown in FIG. 1 into the position shown in FIG.
  • the contact bridges 8 of the normally closed contacts 9 are separated from the fixed contact parts, not shown, and the contact bridges 8 of the normally open contacts 10 come into contact with further fixed contact parts as a normally open contact.
  • the contact pressure springs 7 of the normally closed contacts 9 relax and the contact pressure springs 7 of the normally open contacts 10 are compressed.
  • an NC contact 9 welds in the OFF position according to FIG. 1 when the magnet system is excited, the armature 4 can only move by the opening pressure d, as shown in FIG. 3.
  • the contact bridge 8 held by welding comes into engagement with the edge 19 of the window in the contact carrier 3 and prevents its further movement.
  • the leaf spring 11 Since the leaf spring 11 is relatively short and inelastic, the relative movement of the armature 4 to the contact carrier 3 in the closing direction, which may still occur, is negligible. Burning out of the coil is prevented in this case by the fact that the yoke 5 can move due to its spring-elastic mounting until the magnet system closes. This presupposes that the dimension x, ie the maximum pressure of the conical spring 16 in the OFF position, is at least as large as the distance w or magnetic path reduced by the opening pressure d, ie the condition applies

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The switching device (1) comprises a magnet system with a yoke (5) that is elastically stored by means of a conical wire spring (18). The conical wire spring (18) makes possible the displacement of the yoke (5) until closing the magnet system. In this way, in the case of welded break contact (9) of the switching device (1), current overloading of the magnet system coil can be prevented.

Description

Beschreibungdescription
Elektromagnetisches SchaltgerätElectromagnetic switching device
Die Erfindung bezieht sich auf ein elektromagnetischesThe invention relates to an electromagnetic
Schaltgerät mit einem einen Anker und ein Joch umfassenden Magnetsystem, mit in einem beweglichen Kontaktträger gehaltenen beweglichen Kontaktteilen, die mit Festkontaktteilen Öffner- und Schließerkontakte bilden, wobei das Joch in Schließrichtung des Magnetsystem elastisch aufgehängt ist und in der Ausstellung im Abstand w von dem Anker entfernt liegt.Switchgear with a magnet system comprising an armature and a yoke, with movable contact parts held in a movable contact carrier, which form opener and closer contacts with fixed contact parts, the yoke being elastically suspended in the closing direction of the magnet system and at a distance w from the armature in the exhibition lies.
Ein gattungsgemäßes Schaltgerät ist durch die EP 0 358 050 Bl bekannt. Hier ist der Kontaktträger mit dem Anker derart ela- stisch verbunden, daß bei verschweißtem Öffnerkontakt eine Weiterbewegung des Ankers ohne Betätigung des Schließerkontakts möglich ist. Das Magnetsystem weist hier ein in Schließrichtung des Magnetsystems elastisch aufgehängtes Joch auf. Diese elastische Aufhängung, die elastische Verbindung zwischen dem Anker und dem Kontaktträger und die Elastizität der beweglichen Kontaktteile sind derart aufeinander abgestimmt, daß bei verschweißtem Öffnerkontakt und geschlossenem Magnetsystem die Durchfederwege von Anker und Joch etwa gleich groß sind. Auf diese Weise wird bei Verschweißen von Öffnerkontakten das Magnetsystem geschlossen, um ein Durchbrennen der Magnetspule zu verhindern. Der Anker ist hier mit dem Kontaktträger über eine relativ lange Blattfeder elastisch verbunden, was allerdings im Gehäuse des Schaltgeräts entsprechend viel Platz beansprucht.A generic switching device is known from EP 0 358 050 B1. Here, the contact carrier is elastically connected to the armature in such a way that further movement of the armature is possible without actuation of the normally open contact when the normally closed contact is welded. The magnet system here has a yoke that is elastically suspended in the closing direction of the magnet system. This elastic suspension, the elastic connection between the armature and the contact carrier and the elasticity of the movable contact parts are coordinated with one another in such a way that the deflection paths of the armature and yoke are approximately the same size when the normally closed contact and the closed magnet system are welded together. In this way, when opening contacts are welded, the magnet system is closed to prevent the magnet coil from burning out. The armature is elastically connected to the contact carrier via a relatively long leaf spring, which however takes up a lot of space in the housing of the switching device.
Der Erfindung liegt die Aufgabe zugrunde, ein elektromagnetisches Schaltgerät der obengenannten Art zu schaffen, mit dem die Bedingungen für zwangsgeführte Kontakte im Störfall entsprechend den Vorschriften der Berufsgenossenschaft auf ein- fache Weise eingehalten werden. Die Aufgabe wird gelöst durch eine solche Ausführung der elastischen Aufhängung des Jochs, die nach Einschaltung des Magnetsystems bei verschweißtem Öffnerkontakt eine Bewegung des Jochs bis zur Schließung des MagnetSystems ermöglicht, wobei die elastische Lagerung durch eine zwischen dem Joch und einem Spulenkörper eingefügte Kegelfeder realisiert ist und der maximale Durchdruck x der Kegelfeder in AUS-Stellung mindestens so groß ist wie der um den Öffnerdurchdruck d reduzierte Abstand w.The invention has for its object to provide an electromagnetic switching device of the type mentioned above, with which the conditions for positively driven contacts in the event of a malfunction are easily complied with in accordance with the regulations of the professional association. The object is achieved by such a design of the elastic suspension of the yoke, which, after switching on the magnet system with a welded opener contact, allows the yoke to move until the magnet system closes, the elastic mounting being realized by a conical spring inserted between the yoke and a coil body and the maximum pressure x of the conical spring in the OFF position is at least as large as the distance w reduced by the opening pressure d.
In Bezug auf die Bauhöhe des Schaltgeräts ist es von Vorteil, wenn der Kontaktträger in einem verschmälerten Bereich mit dem Anker durch eine Blattfeder verbunden ist, und der verschmälerte Bereich mit dem Schaltgerätegehäuse Hohlräume bil- det, in denen auf den Kontaktträger wirkende Rückdruckfedern liegen.With regard to the overall height of the switching device, it is advantageous if the contact carrier is connected to the armature by a leaf spring in a narrowed area, and the narrowed area forms cavities in the switchgear housing in which there are back pressure springs acting on the contact carrier.
Anhand der Zeichnung wird ein Ausführungsbeispiel gemäß der Erfindung beschrieben. Es zeigen:An exemplary embodiment according to the invention is described with reference to the drawing. Show it:
FIG 1 das erfindungsgemäße Schaltgerät in Prinzipdarstellung in Seitenansicht im Schnitt in AUS-Darstellung, FIG 2 das Schaltgerät nach FIG 1 in normaler EIN-Stellung und FIG 3 in EIN-Stellung bei verschweißtem Öffnerkontakt.1 shows the switching device according to the invention in a schematic illustration in side view in section in the OFF representation, FIG. 2 shows the switching device according to FIG. 1 in the normal ON position and FIG. 3 in the ON position with a welded break contact.
In FIG 1 ist ein in AUS-Stellung befindliches elektromagnetisches Schaltgerät 1 mit einem hier prinzipmäßig angedeuteten Gehäuse 2 dargestellt, in dem ein Kontaktträger 3 ver- schiebbar geführt ist. Weiterhin umfaßt das elektromagnetische Schaltgerät 1 ein Magnetsystem, das einen Anker 4, ein Joch 5 und eine Spule mit einem Spulenkörper 6 umfaßt . Im Kontaktträger 3 sind mittels Kontaktandruckfedern 7 Kontaktbrücken 8 gehalten, die zusammen mit ihnen verbundenen, hier nicht dargestellten Kontakten, bewegliche Kontaktteile bil- den. Diese bilden mit hier ebenfalls nicht dargestellten Festkontaktteilen in üblicher Weise Öffner- 9 und Schließerkontakte 10. Der Anker 4 und der Kontaktträger 3 sind über eine relativ starre Blattfeder 11 miteinander verbunden. Die Verbindung ist nahezu unelastisch, so daß eine Relativbewegung des Ankers 4 zum Kontaktträger 3 in Schließrichtung für die Funktion im Betrieb vernachlässigbare Bedeutung hat. Die Blattfeder 11 ist durch einen Durchbruch 12 im Anker 4 geführt und stützt sich mit ihren Enden in Ausnehmungen 13 des Kontaktträgers 3 ab. Diese Ausnehmungen 13 befinden sich auf der dem Spulenkörper 6 zugewandten Seite in Anformungen 14 des Kontaktträgers 3, die einen gegenüber der sonstigen Breite des Kontaktträgers 3 verschmälerten Bereich bilden. Hierdurch ergeben sich zum Gehäuse 2 hin zwei Hohlräume 15, in denen zwei den Kontaktträger 3 in AUS-Stellung haltende Rückdruckfedern 16 gehalten sind. Das Joch 5 ist am Boden 17 des Gehäuses 2 gelagert, wobei es durch eine am Spulenkörper 6 sich abstützende Kegelfeder 18 gehalten ist. In der AUS- Stellung liegen der Anker 4 und das Joch 5 im Abstand w, dem sogenannten Magnetweg, voneinander entfernt. Die federelastische Halterung des Jochs 5 ermöglicht seine Bewegung in Schließrichtung, wobei diese abgesehen von dem Abstand w zum Anker 4 durch das Maß x, d.h. das maximal mögliche Zusammendrücken der Kegelfeder 18 bis auf Blockmaß begrenzt ist.1 shows an electromagnetic switching device 1 in the OFF position with a housing 2 indicated here in principle, in which a contact carrier 3 is displaceably guided. Furthermore, the electromagnetic switching device 1 comprises a magnet system which comprises an armature 4, a yoke 5 and a coil with a coil body 6. Contact bridges 8 are held in the contact carrier 3 by means of contact pressure springs, which, together with the contacts (not shown here) connected to them, form movable contact parts. the. These form normally open contacts 9 and normally open contacts 10 with fixed contact parts, also not shown here. The armature 4 and the contact carrier 3 are connected to one another via a relatively rigid leaf spring 11. The connection is almost inelastic, so that a relative movement of the armature 4 to the contact carrier 3 in the closing direction has negligible importance for the function in operation. The leaf spring 11 is guided through an opening 12 in the armature 4 and is supported with its ends in recesses 13 of the contact carrier 3. These recesses 13 are located on the side facing the coil former 6 in the formations 14 of the contact carrier 3, which form a region which is narrower than the other width of the contact carrier 3. This results in two cavities 15 towards the housing 2, in which two back pressure springs 16 are held to hold the contact carrier 3 in the OFF position. The yoke 5 is mounted on the bottom 17 of the housing 2, it being held by a conical spring 18 which is supported on the coil former 6. In the OFF position, the armature 4 and the yoke 5 are at a distance w, the so-called magnetic path, from one another. The spring-elastic mounting of the yoke 5 enables its movement in the closing direction, which apart from the distance w from the armature 4 is limited by the dimension x, ie the maximum possible compression of the conical spring 18 to a block dimension.
Bei Erregung des Magnetsystems bewegt sich der Anker 4 aus der aus FIG 1 ersichtlichen Lage in die in FIG 2 dargestellte Lage. Dabei werden die Kontaktbrücken 8 der Öffnerkontakte 9 von den nicht näher dargestellten Festkontaktteilen getrennt und die Kontaktbrücken 8 der Schließerkontakte 10 kommen mit weiteren Festkontaktteilen als Schließerkontakt in Verbindung. Die Kontaktandruckfedern 7 der Öffnerkontakte 9 entspannen sich dabei und die Kontaktandruckfedern 7 der Schließerkontakte 10 werden zusammengedrückt. Verschweißt jedoch ein Öffnerkontakt 9 in der AUS-Stellung gemäß FIG 1, so kann sich bei Erregung des Magnetsystems der Anker 4 nur um den Öffnerdurchdruck d bewegen, wie in FIG 3 dargestellt. Die durch Verschweißung festgehaltene Kontakt- brücke 8 kommt hier mit dem Rand 19 des Fensters im Kontaktträger 3 in Eingriff und verhindert dessen Weiterbewegung. Da die Blattfeder 11 relativ kurz und unelastisch ist, ist auch die eventuell noch auftretende Relativbewegung des Ankers 4 zum Kontaktträger 3 in Schließrichtung vernachlässigbar ge- ring. Ein Durchbrennen der Spule wird in diesem Fall dadurch verhindert, daß das Joch 5 sich aufgrund seiner federelastischen Lagerung bis zur Schließung des Magnetsystems verschieben kann. Dies setzt voraus, daß das Maß x, d.h. der maximale Durchdruck der Kegelfeder 16 in AUS-Stellung mindestens so groß ist wie der um den Öffnerdurchdruck d reduzierte Abstand w bzw. Magnetweg, d.h. es gilt die BedingungWhen the magnet system is excited, the armature 4 moves from the position shown in FIG. 1 into the position shown in FIG. The contact bridges 8 of the normally closed contacts 9 are separated from the fixed contact parts, not shown, and the contact bridges 8 of the normally open contacts 10 come into contact with further fixed contact parts as a normally open contact. The contact pressure springs 7 of the normally closed contacts 9 relax and the contact pressure springs 7 of the normally open contacts 10 are compressed. However, if an NC contact 9 welds in the OFF position according to FIG. 1, when the magnet system is excited, the armature 4 can only move by the opening pressure d, as shown in FIG. 3. The contact bridge 8 held by welding comes into engagement with the edge 19 of the window in the contact carrier 3 and prevents its further movement. Since the leaf spring 11 is relatively short and inelastic, the relative movement of the armature 4 to the contact carrier 3 in the closing direction, which may still occur, is negligible. Burning out of the coil is prevented in this case by the fact that the yoke 5 can move due to its spring-elastic mounting until the magnet system closes. This presupposes that the dimension x, ie the maximum pressure of the conical spring 16 in the OFF position, is at least as large as the distance w or magnetic path reduced by the opening pressure d, ie the condition applies
x ≥ w - d .x ≥ w - d.
Obwohl die vorliegende Erfindung unter Bezugnahme auf die in der beigefügten Zeichnung dargestellte Ausführungsform erläutert ist, sollte berücksichtigt werden, daß damit nicht beabsichtigt ist, die Erfindung nur auf die dargestellte Ausfüh- rungsform zu beschränken, sondern alle möglichen Änderungen, Modifizierungen und äquivalente Anordnungen, soweit sie vom Inhalt der Patentansprüche gedeckt sind, einzuschließen. Although the present invention is explained with reference to the embodiment shown in the accompanying drawing, it should be borne in mind that it is not intended to limit the invention to the embodiment shown, but rather all possible changes, modifications and equivalent arrangements, as far as they are covered by the content of the claims.

Claims

Patentansprüche claims
1. Elektromagnetisches Schaltgerät (1) mit einem einen Anker (4) und ein Joch (5) umfassenden Magnetsystem, mit in einem beweglichen Kontaktträger (3) gehaltenen beweglichen Kontaktteilen, die mit Festkontaktteilen Öffner- (9) und Schließerkontakte (10) bilden, wobei das Joch (5) in Schließrichtung des Magnetsystem elastisch gelagert ist und in der AUS-Stellung im Abstand w, dem Magnetweg, von dem Anker (4) entfernt liegt , g e k e n n z e i c h n e t d u r c h eine solche1. Electromagnetic switching device (1) with a magnet system comprising an armature (4) and a yoke (5), with movable contact parts held in a movable contact carrier (3), which form break contacts (9) and make contacts (10) with fixed contact parts, wherein the yoke (5) is elastically supported in the closing direction of the magnet system and is in the OFF position at a distance w, the magnetic path, from the armature (4), characterized by such
Ausführung der elastischen Aufhängung des Jochs (5) , die nach Einschaltung des Magnetsystems bei verschweißtem Öffnerkontakt (9) eine Bewegung des Jochs (5) bis zur Schließung des Magnetsystems ermöglicht, wobei die elastische Lagerung durch eine zwischen dem Joch (5) und einem Spulenkörper (6) eingefügte Kegelfeder (18) realisiert ist und der maximale Durchdruck (x) der Kegelfeder (18) in AUS-Stellung mindestens so groß ist wie der um den Öffnerdurchdruck (d) reduzierte Abstand (w) .Execution of the elastic suspension of the yoke (5), which, after switching on the magnet system with a welded opener contact (9), enables the yoke (5) to move until the magnet system closes, the elastic mounting being carried out by a between the yoke (5) and a coil former (6) inserted conical spring (18) is realized and the maximum pressure (x) of the conical spring (18) in the OFF position is at least as large as the distance (w) reduced by the opening pressure (d).
2. Elektromagnetisches Schaltgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Kontaktträger (3) in einem verschmälerten Bereich mit dem Anker (4) durch eine Blattfeder (11) verbunden ist und der verschmälerte Bereich mit dem Gehäuse (2) des Schaltgeräts (1) Hohlräume (15) bildet, in denen auf den Kontaktträger (3) wirkende Rückdruckfedern (16) gelagert sind. 2. Electromagnetic switching device according to claim 1, characterized in that the contact carrier (3) in a narrowed area with the armature (4) is connected by a leaf spring (11) and the narrowed area with the housing (2) of the switching device (1) Forms cavities (15) in which back pressure springs (16) acting on the contact carrier (3) are mounted.
EP97949883A 1996-11-20 1997-11-07 Electromagnetic switching device Expired - Lifetime EP0939966B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19648053A DE19648053C1 (en) 1996-11-20 1996-11-20 Electromagnetic switching device such as contactor and circuit-breaker
DE19648053 1996-11-20
PCT/DE1997/002603 WO1998022966A1 (en) 1996-11-20 1997-11-07 Electromagnetic switching device

Publications (2)

Publication Number Publication Date
EP0939966A1 true EP0939966A1 (en) 1999-09-08
EP0939966B1 EP0939966B1 (en) 2000-08-02

Family

ID=7812266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97949883A Expired - Lifetime EP0939966B1 (en) 1996-11-20 1997-11-07 Electromagnetic switching device

Country Status (5)

Country Link
US (1) US6040750A (en)
EP (1) EP0939966B1 (en)
CN (1) CN1129936C (en)
DE (2) DE19648053C1 (en)
WO (1) WO1998022966A1 (en)

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DE19751251A1 (en) 1997-11-19 1999-05-20 Hoechst Marion Roussel De Gmbh Substituted imidazolidine derivatives, their manufacture, their use and pharmaceutical preparations containing them
UA61989C2 (en) * 1998-12-01 2003-12-15 Shneider Electr Ind S A Electromechanical contactor
DE19922462A1 (en) 1999-05-17 2000-11-23 Aventis Pharma Gmbh New phenylureidobenzyl-substituted spiro-imidazolidinedione derivatives, are inhibitors of leukocyte adhesion or migration or VLA-4 receptors, useful e.g. for treating inflammatory or allergic disease
US6707357B1 (en) * 2002-08-30 2004-03-16 Tendex Electric Co., Ltd. Electromagnetic switch
JP5917853B2 (en) 2011-08-11 2016-05-18 富士通コンポーネント株式会社 Switches and connectors
CN103035449B (en) * 2011-09-30 2015-03-11 西门子公司 Pre-contact module in capacitor contactor
KR101529589B1 (en) 2013-12-19 2015-06-17 엘에스산전 주식회사 Magnetic contactor
CN108962687B (en) * 2018-09-17 2024-05-07 浙江天正电气股份有限公司 AC contactor

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US3060355A (en) * 1960-05-20 1962-10-23 Westinghouse Electric Corp Relay magnet suspension
DE3540460A1 (en) * 1985-11-14 1987-05-21 Siemens Ag ELECTROMAGNETIC SWITCHGEAR
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Title
See references of WO9822966A1 *

Also Published As

Publication number Publication date
WO1998022966A1 (en) 1998-05-28
US6040750A (en) 2000-03-21
EP0939966B1 (en) 2000-08-02
DE19648053C1 (en) 1998-03-12
CN1231060A (en) 1999-10-06
DE59702113D1 (en) 2000-09-07
CN1129936C (en) 2003-12-03

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