EP0976138A1 - Electromagnetic switching device - Google Patents

Electromagnetic switching device

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Publication number
EP0976138A1
EP0976138A1 EP98929199A EP98929199A EP0976138A1 EP 0976138 A1 EP0976138 A1 EP 0976138A1 EP 98929199 A EP98929199 A EP 98929199A EP 98929199 A EP98929199 A EP 98929199A EP 0976138 A1 EP0976138 A1 EP 0976138A1
Authority
EP
European Patent Office
Prior art keywords
contact
bridge support
contact bridge
armature
pressure spring
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
EP98929199A
Other languages
German (de)
French (fr)
Other versions
EP0976138B1 (en
Inventor
Markus Meier
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 EP0976138A1 publication Critical patent/EP0976138A1/en
Application granted granted Critical
Publication of EP0976138B1 publication Critical patent/EP0976138B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/101—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening

Definitions

  • the invention relates to an electromagnetic
  • Switchgear with a pair of fixed contacts, a pair of fixed contact elements to which the fixed contacts are individually fastened, a movable contact element loaded with a contact pressure spring with a pair of movable contacts thereon which can be brought into and out of connection with the fixed contacts , a contact bridge support on which the movable contact element is held by means of the contact pressure spring, a first electromagnetic drive device for quick shutdown, with a first armature and a coil which is connected in series with one of the fixed contact elements and a second electromagnetic drive device for switching on and off of the load current with a second armature.
  • a generic electromagnetic switching device is known from DE 43 18 196 AI. With this electromagnetic switching device, load currents are switched and excessive currents, mainly short-circuit currents, are limited.
  • the first electromagnetic drive device is operated here as an auxiliary system which exerts a force on the movable contact element in the event of excessive currents and thus opens the contacts. This prevents the contacts from being in an undefined floating state due to electrodynamic forces, in which the contacts can weld.
  • Such sweat-free contactors are used in conjunction with a circuit breaker. For economic reasons, the contactor is usually equipped with a low breaking capacity compared to the circuit breaker. Its current limitation only supports the circuit breaker.
  • auxiliary agnetsy- stem of the contactor responds at a higher current than that of the circuit breaker. It is also required that the contacts are kept closed by the main magnet system in the event of a short circuit until they are separated from one another by the contactor's auxiliary magnet system. To meet these two requirements, larger magnet systems are required than for standard devices with the same switching capacity.
  • the invention has for its object to provide an electromagnetic switching device of the above type, in which a short-circuit shutdown takes place in connection with improved measures to prevent welding of the contacts.
  • the contact bridge carrier is displaceable in its longitudinal axis with respect to the second anchor, that a compression spring engages on the contact bridge carrier, via which the movement of the second anchor to the contact opening can be transmitted to the contact bridge carrier and that the movement of the first armature upon response of the first electromagnetic drive device to the contact bridge support is implemented in such a way that the contact pressure spring is compressed in a first phase and thereby the contact pressure is increased and at the same time the
  • Compression spring stores energy, by means of which the contact bridge carrier is pressed in a second phase in the direction causing the contact opening.
  • FIG. 2 shows a sectional illustration of the switching device according to FIG. 1 with a short-circuit current present
  • FIG 4 shows a sectional view of the switching device according to the invention shown in FIG 1 in the OFF state.
  • the contact system 2 arranged in the arc housing 5 comprises a movable contact element 6 with movable contacts 7 at its opposite end regions for making contact with a pair of fixed contacts 8, which are connected to a pair of fixed contact elements 9.
  • the movable contact element 6 is mounted in a window 10 of a contact bridge carrier 11 guided on the housing side by means of a contact pressure spring 12.
  • 1 shows the electromagnetic switching device 1 in the ON state, in which the contact bridge support 11 is in the lower position and the contact pressure spring 12 brings about the contacting of the movable contacts 7 with the opposite fixed contacts 8 via the movable contact element 6.
  • the lower end of the contact bridge support 11 is designed as a pin 13 which is guided in a bore 14 of a contact support plate 15.
  • the contact carrier plate 15 is connected to the armature 27 of the second electromagnetic drive device 4.
  • the contact bridge support 11 is axially displaceable in the bore 14 via the pin 13.
  • the movement in the direction of the drive device 4 located at the bottom in FIG. 1 acts on the contact bridge carrier 11 and the contact carrier plate 15 supporting compression spring 16.
  • a lever 17 acting as a transmission member is rotatably mounted by means of a bolt 18, the two arms 19 and 20 of which are supported on shoulders 21.
  • the first electromagnetic drive device 3 is arranged such that its armature 22, when triggered, actuates the lever 17 counterclockwise via a push pin 23 carried along.
  • the coil 24 of the first electromagnetic drive device 3 is connected in series with one of the fixed contact elements 9.
  • the switching device 1 is reset to its initial state according to FIG. 4 by switching off the second electromagnetic drive device 4.
  • the back pressure spring (not shown here) of the second electromagnetic drive device 4 at 17 pushed back by an elevation in the housing 26 over the edge 25, the spar 28 provided with the edge 25 bending laterally away.
  • the invention achieves in a simple manner that when a short circuit occurs, the contact pressure is increased in a first phase with the aid of an additional electromagnetic drive device 3, the contact pressure spring 12 and the compression spring 16 storing energy. In the subsequent second phase, after the contact bridge support 11 has been released, the energy stored in the springs 12, 16 is used to suddenly open the contacts 7 and 8.

Landscapes

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

Abstract

The invention relates to an electromagnetic switching device (1) having an electromagnetic driving device (3) that acts as an auxiliary magnetic system, with which, on occurrence of a short-circuit current, the contact force is increased before the contacts (7, 8) are abruptly rifted. To achieve this, the driving device (3) actuates a lever (17) that is rotationally stored on the contact bridge support (11). This lever (17) displaces the contact bridge support (11), thus compressing a contact pressure spring (12) as well as another pressure spring (16).

Description

Beschreibungdescription
Elektromagnetisches SchaltgerätElectromagnetic switching device
Die Erfindung bezieht sich auf ein elektromagnetischesThe invention relates to an electromagnetic
Schaltgerät mit einem Paar von festen Kontakten, einem Paar von festen Kontaktelementen, an denen die Festkontakte einzeln befestigt sind, ein mit einer Kontaktdruckfeder beaufschlagtes bewegliches Kontaktelement mit einem Paar von be- weglichen Kontakten daran, die in und außer Verbindung mit den festen Kontakten bringbar sind, einem Kontaktbrückenträger, an dem das bewegliche Kontaktelement mittels der Kontaktdruckfeder gehalten ist, einer ersten elektromagnetischen Antriebsvorrichtung zur Schnellabschaltung, mit einem ersten Anker und einer Spule, die in Serie mit einem der festen Kontaktelemente verbunden ist und einer zweiten elektromagnetischen Antriebsvorrichtung zur Ein- und Ausschaltung des Laststroms mit einem zweiten Anker.Switchgear with a pair of fixed contacts, a pair of fixed contact elements to which the fixed contacts are individually fastened, a movable contact element loaded with a contact pressure spring with a pair of movable contacts thereon which can be brought into and out of connection with the fixed contacts , a contact bridge support on which the movable contact element is held by means of the contact pressure spring, a first electromagnetic drive device for quick shutdown, with a first armature and a coil which is connected in series with one of the fixed contact elements and a second electromagnetic drive device for switching on and off of the load current with a second armature.
Ein gattungsgemäßes elektromagnetisches Schaltgerät ist aus der DE 43 18 196 AI bekannt. Mit diesem elektromagnetischen Schaltgerät werden Lastströme geschaltet sowie überhöhte Ströme, hauptsächlich Kurzschlußströme, begrenzt. Die erste elektromagnetische Antriebsvorrichtung wird hier als Hilfssy- stem betrieben, das bei überhöhten Strömen eine Kraft auf das bewegliche Kontaktelement ausübt und somit die Kontakte öffnet. Es wird damit verhindert, daß sich die Kontakte durch elektrodynamische Kräfte in einem Undefinierten Schwebezustand befinden, in dem die Kontakte verschweißen können. Der- artige schweißfreie Schütze werden in Verbindung mit einem Leistungsschalter eingesetzt. Das Schütz wird in der Regel aus wirtschaftlichen Gründen mit einem im Vergleich zum Leistungsschalter niedrigen Ausschaltvermögen ausgestattet. Seine Strombegrenzung wirkt nur unterstützend für den Leistungs- Schalter. Es ist daher erforderlich, daß das Hilfs agnetsy- stem des Schützes bei einem höheren Strom als das des Leistungsschalters anspricht. Weiterhin wird gefordert, daß die Kontakte bei einem Kurzschluß solange durch das Hauptmagnetsystem geschlossen gehalten werden, bis sie durch das Hilfs- magnetsystem des Schützes voneinander getrennt werden. Zur Erfüllung dieser beiden Forderungen werden größere Magnetsysteme als für Standardgeräte mit gleicher Schaltleistung benötigt .A generic electromagnetic switching device is known from DE 43 18 196 AI. With this electromagnetic switching device, load currents are switched and excessive currents, mainly short-circuit currents, are limited. The first electromagnetic drive device is operated here as an auxiliary system which exerts a force on the movable contact element in the event of excessive currents and thus opens the contacts. This prevents the contacts from being in an undefined floating state due to electrodynamic forces, in which the contacts can weld. Such sweat-free contactors are used in conjunction with a circuit breaker. For economic reasons, the contactor is usually equipped with a low breaking capacity compared to the circuit breaker. Its current limitation only supports the circuit breaker. It is therefore necessary that the auxiliary agnetsy- stem of the contactor responds at a higher current than that of the circuit breaker. It is also required that the contacts are kept closed by the main magnet system in the event of a short circuit until they are separated from one another by the contactor's auxiliary magnet system. To meet these two requirements, larger magnet systems are required than for standard devices with the same switching capacity.
Der Erfindung liegt die Aufgabe zugrunde, ein elektromagnetisches Schaltgerät der obengenannten Art zu schaffen, bei dem eine Kurzschlußabschaltung in Verbindung mit verbesserten Maßnahmen zur Verhinderung der Verschweißung der Kontakte erfolgt.The invention has for its object to provide an electromagnetic switching device of the above type, in which a short-circuit shutdown takes place in connection with improved measures to prevent welding of the contacts.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Kon- taktbrückenträger in seiner Längsachse gegenüber dem zweiten Anker verschiebbar ist, daß am Kontaktbrückenträger eine Druckfeder eingreift, über die die Bewegung des zweiten An- kers zur Kontaktöffnung auf den Kontaktbrückenträger übertragbar ist und daß die Bewegung des ersten Ankers bei Ansprechen der ersten elektromagnetischen Antriebsvorrichtung auf den Kontaktbrückenträger derart umgesetzt wird, daß die Kontaktdruckfeder in einer ersten Phase komprimiert und da- durch der Kontaktdruck erhöht wird und zugleich auch dieThe object is achieved in that the contact bridge carrier is displaceable in its longitudinal axis with respect to the second anchor, that a compression spring engages on the contact bridge carrier, via which the movement of the second anchor to the contact opening can be transmitted to the contact bridge carrier and that the movement of the first armature upon response of the first electromagnetic drive device to the contact bridge support is implemented in such a way that the contact pressure spring is compressed in a first phase and thereby the contact pressure is increased and at the same time the
Druckfeder Energie speichert, durch welche der Kontaktbrük- kenträger in einer zweiten Phase in die die Kontaktöffnung bewirkende Richtung gedrückt wird.Compression spring stores energy, by means of which the contact bridge carrier is pressed in a second phase in the direction causing the contact opening.
Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.Advantageous developments of the invention can be found in the subclaims.
Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen: FIG 1 eine Schnittdarstellung eines erfindungsgemäßen Schaltgeräts bei betriebsmäßiger Stromführung im EIN-Zustand,An embodiment of the invention is explained below with reference to a drawing. Show it: 1 shows a sectional illustration of a switching device according to the invention with operational current supply in the ON state,
FIG 2 eine Schnittdarstellung des Schaltgeräts gemäß FIG 1 bei anliegendem Kurzschlußstrom,2 shows a sectional illustration of the switching device according to FIG. 1 with a short-circuit current present,
FIG 3 eine Schnittdarstellung des erfindungsgemäßen3 shows a sectional view of the invention
Schaltgeräts gemäß FIG 1 nach Auslösung des HilfsmagnetSystems undSwitching device according to FIG 1 after triggering the auxiliary magnet system and
FIG 4 eine Schnittdarstellung des erfindungsgemäßen Schaltgeräts gemäß FIG 1 im AUS-Zustand.4 shows a sectional view of the switching device according to the invention shown in FIG 1 in the OFF state.
FIG 1 zeigt ein elektromagnetisches Schaltgerät 1 mit einem Kontaktsystem 2, einer ersten elektromagnetischen Antriebsvorrichtung 3 und einer zweiten elektromagnetischen Antriebs- Vorrichtung 4. Das im Lichtbogengehäuse 5 angeordnete Kontaktsystem 2 umfaßt ein bewegliches Kontaktelement 6 mit beweglichen Kontakten 7 an seinen einander gegenüberliegenden Endbereichen für eine Kontaktgabe mit einem Paar von festen Kontakten 8, die mit einem Paar von festen Kontaktelementen 9 in Verbindung stehen. Das beweglich Kontaktelement 6 ist in einem Fenster 10 eines gehäuseseitig geführten Kontaktbrückenträgers 11 mittels einer Kontaktdruckfeder 12 gelagert. FIG 1 zeigt das elektromagnetische Schaltgerät 1 im EIN-Zustand, in dem sich der Kontaktbrückenträger 11 in der unteren Stellung befindet und dabei die Kontaktdruckfeder 12 über das bewegliche Kontaktelement 6 die Kontaktierung der beweglichen Kontakte 7 mit den gegenüberliegenden festen Kontakten 8 bewirkt. Das untere Ende des Kontaktbrückenträgers 11 ist als Stift 13 ausgeführt, der in einer Bohrung 14 einer Kontaktträgerplatte 15 geführt ist. Die Kontaktträgerplatte 15 ist mit dem Anker 27 der zweiten elektromagnetischen Antriebsvorrichtung 4 verbunden. Der Kontaktbrückenträger 11 ist über den Stift 13 in der Bohrung 14 axial verschiebbar. Der Bewegung in Richtung der in FIG 1 unten gelegenen An- triebsvorrichtung 4 wirkt eine sich am Kontaktbrückenträger 11 und der Kontaktträgerplatte 15 abstützende Druckfeder 16 entgegen. An dem Kontaktbrückenträger 11 ist mittels eines Bolzens 18 ein als Übertragungsglied wirkender Hebel 17 drehbar gelagert, dessen beide Arme 19 bzw. 20 sich an Absätzen 21 abstützen. Die erste elektromagnetische Antriebsvorrichtung 3 ist derart angeordnet, daß ihr Anker 22 bei Auslösung den Hebel 17 über einen mitgeführten Druckstift 23 entgegen dem Uhrzeigersinn betätigt. Die Spule 24 der ersten elektromagnetischen Antriebsvorrichtung 3 ist in Serie mit einem der festen Kontaktelemente 9 geschaltet. Bei der infolge von1 shows an electromagnetic switching device 1 with a contact system 2, a first electromagnetic drive device 3 and a second electromagnetic drive device 4. The contact system 2 arranged in the arc housing 5 comprises a movable contact element 6 with movable contacts 7 at its opposite end regions for making contact with a pair of fixed contacts 8, which are connected to a pair of fixed contact elements 9. The movable contact element 6 is mounted in a window 10 of a contact bridge carrier 11 guided on the housing side by means of a contact pressure spring 12. 1 shows the electromagnetic switching device 1 in the ON state, in which the contact bridge support 11 is in the lower position and the contact pressure spring 12 brings about the contacting of the movable contacts 7 with the opposite fixed contacts 8 via the movable contact element 6. The lower end of the contact bridge support 11 is designed as a pin 13 which is guided in a bore 14 of a contact support plate 15. The contact carrier plate 15 is connected to the armature 27 of the second electromagnetic drive device 4. The contact bridge support 11 is axially displaceable in the bore 14 via the pin 13. The movement in the direction of the drive device 4 located at the bottom in FIG. 1 acts on the contact bridge carrier 11 and the contact carrier plate 15 supporting compression spring 16. On the contact bridge support 11, a lever 17 acting as a transmission member is rotatably mounted by means of a bolt 18, the two arms 19 and 20 of which are supported on shoulders 21. The first electromagnetic drive device 3 is arranged such that its armature 22, when triggered, actuates the lever 17 counterclockwise via a push pin 23 carried along. The coil 24 of the first electromagnetic drive device 3 is connected in series with one of the fixed contact elements 9. When due to
Oberströmen, insbesondere Kurzschlußströmen erfolgenden Auslösung, wird durch den Druckstift 23 der ersten elektromagnetischen Antriebsvorrichtung 3 eine Kraft ausgeübt, die über den Bolzen 18 so umgeleitet wird, daß dadurch die Kontakt- kraft mit ansteigendem Strom erhöht wird.Upper currents, in particular short-circuit currents triggering, a force is exerted by the pressure pin 23 of the first electromagnetic drive device 3, which force is redirected via the bolt 18 in such a way that the contact force is increased as the current increases.
Bei anliegendem Kurzschlußstrom wird der KontaktbrückenträgerWhen there is a short-circuit current, the contact bridge carrier becomes
11 über den Bolzen 18 in Richtung der Kontaktträgerplatte 15 verschoben, wobei sich nur noch der Arm 19 des Hebels 17 an dem einen Absatz 21 abstützt und zugleich eine Komprimierung der Kontaktdruckfeder 12 und der Druckfeder 16 erfolgt (siehe FIG 2) .11 displaced via the pin 18 in the direction of the contact carrier plate 15, only the arm 19 of the lever 17 being supported on one shoulder 21 and at the same time the contact pressure spring 12 and the pressure spring 16 being compressed (see FIG. 2).
Bei einem bestimmten Stromwert wird die Auslenkung des Hebels 17 so groß, daß er über eine Kante 25 des Absatzes 21 rutscht. Dies hat zur Folge, daß die in der KontaktdruckfederAt a certain current value, the deflection of the lever 17 becomes so large that it slides over an edge 25 of the shoulder 21. This has the consequence that in the contact pressure spring
12 und in der Druckfeder 16 gespeicherte Energie ein schlagartiges Öffnen der Kontakte 7,8, wie in FIG 3 dargestellt, bewirkt .12 and energy stored in the compression spring 16 causes the contacts 7, 8 to open suddenly, as shown in FIG. 3.
Nach Beheben des Kurzschlusses wird das Schaltgerät 1 durch Ausschalten der zweiten elektromagnetischen Antriebsvorrichtung 4 in seinen Ausgangszustand gemäß FIG 4 zurückversetzt. Hierbei wird durch die hier nicht dargestellte Rückdruckfeder der zweiten elektromagnetischen Antriebsvorrichtung 4 der He- bei 17 durch eine Erhebung im Gehäuse 26 über die Kante 25 zurückgedrückt, wobei sich der mit der Kante 25 versehene Holm 28 seitlich wegbiegt.After the short circuit has been rectified, the switching device 1 is reset to its initial state according to FIG. 4 by switching off the second electromagnetic drive device 4. Here, the back pressure spring (not shown here) of the second electromagnetic drive device 4 at 17 pushed back by an elevation in the housing 26 over the edge 25, the spar 28 provided with the edge 25 bending laterally away.
Durch die Erfindung wird auf einfache Weise erreicht, daß bei Auftreten eines Kurzschlusses mit Hilfe einer zusätzlichen elektromagnetischen Antriebsvorrichtung 3 in einer ersten Phase der Kontaktdruck erhöht wird, wobei die Kontaktdruckfeder 12 und die Druckfeder 16 Energie speichern. In der an- schließenden zweiten Phase wird nach Freigabe des Kontakt- brückenträgers 11 die in den Federn 12,16 gespeicherte Energie ausgenutzt, um schlagartig die Kontakte 7 und 8 zu öffnen.The invention achieves in a simple manner that when a short circuit occurs, the contact pressure is increased in a first phase with the aid of an additional electromagnetic drive device 3, the contact pressure spring 12 and the compression spring 16 storing energy. In the subsequent second phase, after the contact bridge support 11 has been released, the energy stored in the springs 12, 16 is used to suddenly open the contacts 7 and 8.
Obwohl die vorliegende Erfindung unter Bezugnahme auf die in der beigefügten Zeichnung dargestellte Ausfuhrungsform erläutert ist, sollte berücksichtigt werden, daß damit nicht beabsichtigt ist, die Erfindung nur auf die dargestellte Ausführungsform 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 from Contents of the claims are covered.

Claims

Patentansprüche claims
1. Elektromagnetisches Schaltgerät (1) mit einem Paar von festen Kontakten (8), einem Paar von festen Kontaktelementen (9), an denen die festen Kontakte (8) einzeln befestigt sind; ein mit einer Kontaktdruckfeder (12) beaufschlagtes bewegliches Kontaktelement (6) mit einem paar von beweglichen Kontakten (7) daran, die in und außer Verbindung mit den festen Kontakten (8) bringbar sind; einem Kontaktbrückenträger (11) , an dem das bewegliche Kontaktelement (6) mittels der Kontaktdruckfeder (12) gehalten ist; einer ersten elektromagnetischen Antriebsvorrichtung (3) zur Schnellabschaltung, mit einem ersten Anker (22) und einer Spule (24), die in Serie mit einem der festen Kontaktelemente (9) verbunden ist; einer zweiten elektromagnetischen Antriebsvorrichtung (4) zur Ein- und Ausschaltung des Laststromes, mit einem zweiten Anker (27), dadurch gekennzeichnet, daß der Kontaktbrückenträger (11) in seiner Längsachse gegenüber dem zweiten Anker (27) verschiebbar ist, daß am Kontaktbrücken- träger (11) eine Druckfeder (16) angreift, über die die Bewegung des zweiten Ankers (27) zur Kontaktöffnung auf den Kontaktbrückenträger (11) übertragbar ist, daß die Bewegung des ersten Ankers (22) bei Ansprechen der ersten elektromagnetischen Antriebsvorrichtung (3) auf den Kontaktbrückenträger (11) derart umgesetzt wird, daß die Kontaktdruckfeder (12) in einer ersten Phase komprimiert und dadurch der Kontaktdruck erhöht wird und zugleich auch die Druckfeder (16) Energie speichert, durch welche der Kontaktbrückenträger (11) in einer zweiten Phase in die die Kontaktöffnung bewirkende Rich- tung gedrückt wird.1. Electromagnetic switching device (1) with a pair of fixed contacts (8), a pair of fixed contact elements (9) to which the fixed contacts (8) are individually attached; a movable contact element (6) loaded with a contact pressure spring (12) with a pair of movable contacts (7) thereon which can be brought into and out of connection with the fixed contacts (8); a contact bridge support (11) on which the movable contact element (6) is held by means of the contact pressure spring (12); a first electromagnetic drive device (3) for quick shutdown, with a first armature (22) and a coil (24) which is connected in series with one of the fixed contact elements (9); a second electromagnetic drive device (4) for switching the load current on and off, with a second armature (27), characterized in that the contact bridge support (11) is displaceable in its longitudinal axis relative to the second armature (27), that on the contact bridge support (11) a compression spring (16) engages, via which the movement of the second armature (27) to the contact opening can be transmitted to the contact bridge support (11), that the movement of the first armature (22) upon response of the first electromagnetic drive device (3) the contact bridge support (11) is implemented in such a way that the contact pressure spring (12) compresses in a first phase and thereby the contact pressure is increased and at the same time the pressure spring (16) stores energy through which the contact bridge support (11) in a second phase into the the direction causing the contact opening is pressed.
2. Elektromagnetisches Schaltgerät nach Anspruch 1, dadurch gekennzeichnet, daß an dem Kontakt- brückenträger (11) ein Übertragungsglied (17) zur Übertragung der Bewegung des ersten Ankers (22) angekoppelt ist. 2. Electromagnetic switching device according to claim 1, characterized in that a transmission member (17) for transmitting the movement of the first armature (22) is coupled to the contact bridge support (11).
3. Elektromagnetisches Schaltgerät nach Anspruch 2, dadurch gekennzeichnet, daß als Übertragungsglied ein am Kontaktbrückenträger (11) drehbar gelagerter Hebel (17) vorgesehen ist, dessen einer Arm (19) sich in der ersten Phase unter Drehung und gleichzeitiger Mitnahme des Kontäktbrückenträgers (11) abstützt und in der zweiten Phase zur Kontaktöffnung freigegeben ist . 3. Electromagnetic switching device according to claim 2, characterized in that as a transmission member on the contact bridge support (11) rotatably mounted lever (17) is provided, one arm (19) in the first phase with rotation and simultaneous entrainment of the contact bridge support (11) is supported and released in the second phase for contact opening.
EP98929199A 1997-04-18 1998-04-06 Electromagnetic switching device Expired - Lifetime EP0976138B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19716380A DE19716380C1 (en) 1997-04-18 1997-04-18 Electromagnetic switching device
DE19716380 1997-04-18
PCT/DE1998/000975 WO1998048436A1 (en) 1997-04-18 1998-04-06 Electromagnetic switching device

Publications (2)

Publication Number Publication Date
EP0976138A1 true EP0976138A1 (en) 2000-02-02
EP0976138B1 EP0976138B1 (en) 2002-07-10

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EP98929199A Expired - Lifetime EP0976138B1 (en) 1997-04-18 1998-04-06 Electromagnetic switching device

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US (1) US6150909A (en)
EP (1) EP0976138B1 (en)
JP (1) JP4056567B2 (en)
CN (1) CN1092392C (en)
DE (1) DE19716380C1 (en)
WO (1) WO1998048436A1 (en)

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Also Published As

Publication number Publication date
DE19716380C1 (en) 1998-10-08
US6150909A (en) 2000-11-21
CN1092392C (en) 2002-10-09
CN1242868A (en) 2000-01-26
JP2001520798A (en) 2001-10-30
WO1998048436A1 (en) 1998-10-29
JP4056567B2 (en) 2008-03-05
EP0976138B1 (en) 2002-07-10

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