EP1212772B1 - Electromagnetic switchgear - Google Patents

Electromagnetic switchgear Download PDF

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Publication number
EP1212772B1
EP1212772B1 EP00963966A EP00963966A EP1212772B1 EP 1212772 B1 EP1212772 B1 EP 1212772B1 EP 00963966 A EP00963966 A EP 00963966A EP 00963966 A EP00963966 A EP 00963966A EP 1212772 B1 EP1212772 B1 EP 1212772B1
Authority
EP
European Patent Office
Prior art keywords
contact
driver
contact bridge
break
switching device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00963966A
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German (de)
French (fr)
Other versions
EP1212772A1 (en
Inventor
Kurt Held
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
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Siemens AG
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Publication of EP1212772A1 publication Critical patent/EP1212772A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
    • H01H47/10—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current by switching-in or -out impedance external to the relay winding
    • 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
    • H01H50/66—Driving arrangements between movable part of magnetic circuit and contact with lost motion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices

Definitions

  • the present invention relates to an electromagnetic Switchgear with at least one drive coil, when applied a contact driver with a starting current moves from a rest position into an actuation position, wherein the contact driver has an opening driving element, by means of this when moving the contact carrier in the operating position when reaching between the Rest position and the operating position lying open driving position a contact bridge of an opener of counter contacts the opener is lifted off.
  • Such an electromagnetic switching device is general known.
  • the contact bridge is also in the actuation position constantly against a reset element Opening driver element pressed.
  • the contact bridge When returning the The contact bridge in the rest position is the contact bridge therefore when the opening take-off position is reached again the counter contacts lowered. But in some applications such a lowering when the opening driving position is reached undesirable. Rather, the switching behavior of the Have a hysteresis.
  • the NC contact If the NC contact is switched without hysteresis, becomes the opener when the opening driving position is reached closed again and thus the drive coil immediately again acted upon by the starting current. This results in a tightening of the contact person and thus opening again of the opener. Because of this constant switching of the current, with which the drive coil is loaded, it can happen that the main contacts flutter or against each other without pressure issue. This leads to great wear and tear on the Main contacts, possibly even to weld the Main contacts.
  • the object of the present invention is an electromagnetic To create switching device in which the break contact can be operated with a hysteresis.
  • the contact driver Has locking driving element, by means of which when moving of the contact person in the rest position when reached one between the inoperative position and the open driving position lying contact position the contact bridge is moved to the counter contacts and that the opener a holding device is assigned to the contact bridge holds in an open position in which the contact bridge from the counter contacts is lifted as long as the contact driver from the opening driving position to the closing driving position is moved.
  • the holding device is particularly simple if the holding device is designed as a magnetic device and the contact bridge is at least partially made of a ferromagnetic Material exists.
  • the magnetic device is particularly effective.
  • the magnetic device is structurally special simply trained. In addition, this works from the magnetic device created stray field as a blowing field for any arcs that occur when the contact bridge is lifted off the Mating contacts.
  • the magnetic device exercises on the contact bridge Tightening and holding force. This is particularly true for those at risk of vibration Applications of importance.
  • the opening driving element is arranged such that the contact bridge to an intermediate lifting position of the counter contacts, and the holding device in such a way is designed so that the contact bridge from the intermediate lifting position is transferred to the open position simple way the risk of damage to the contact bridge avoided when transferring to the open position.
  • the closing driving element is arranged such that it the contact bridge into an intermediate lowering position from the Deflects open position, and the contact bridge a reset element is assigned that the contact bridge from the Lower intermediate position is lowered to the counter contacts in a simple way the risk of damage to the contact bridge avoided when lowering onto the counter contacts.
  • the return element is a return spring educated.
  • the return spring can, for example on the one hand on the contact bridge and on the other hand in relation to one support of the switchgear stationary bearing.
  • the break contact has a current setting device for the Drive coil is connected such that when opening or Closing the opener, the current is changed with which is applied to the drive coil results in particular simple way of switching the electromagnetic Switchgear from pull-in to holding current.
  • the switching device just before Reaching the actuation position from tightening to holding current switch and the starting current just before reaching the Switch on the rest position again. It is despite taking off the contact bridge from the mating contacts just before Reaching the actuation position a large distance of the contact bridge reachable from the counter contacts, so that none There is a risk of a non-extinguishing arc.
  • an electromagnetic switching device has a drive coil 1. If an actuation command is given to a current setting device 2 for the drive coil 1, the current setting device 2 applies a current I to the drive coil 1.
  • the current I is at least the size of a starting current I A.
  • a contact driver 3 - shown only schematically in FIG. 1 - is moved from a rest position R into an actuation position B.
  • the opener 5 bridges a resistor 6.
  • the drive coil 1 is therefore only connected to the current setting device 2 via the resistor 6, but no longer without resistance via the opener 5. Therefore, the current I drops to a holding current I H when the opener 5 is opened. Conversely, when the opener 5 closes, the current I increases again to the starting current I A.
  • the opener 5 is thus connected to the current setting device 2 in such a way that when the opener 5 is opened or closed a change in the current I with which the drive coil 1 is applied takes place.
  • the contact driver 3 has an opening driving element 7 on.
  • the opening driving element 7 is formed as a driving surface according to the embodiment.
  • a contact bridge is formed by means of the opening driving element 7 8 of the opener 5 is lifted from counter contacts 9 of the opener 5, when the contact driver 3 in the operating position B is moved. The contact bridge 8 is only then lifted from the mating contacts 9 when the contact driver 3 reaches an opening driving position M1.
  • the contact bridge 8 is lifted off against the force of a Reset element 10, which is shown in FIGS 2 to 4 as a return spring is trained.
  • the return spring 10 is supported on the one hand on the contact bridge 8 and on the other a bearing 11, which is stationary with respect to the switching device is.
  • the return spring 10 is to the side by suitable, generally known guide elements performed. Therefore, these are not shown for the sake of clarity.
  • the opening driving element 7 arranged such that it is the contact bridge 8 in an intermediate lifting position Z1 lifts off. If the contact bridge 8 has reached the intermediate lifting position Z1, it is one exposed to magnetic force from a magnetic device 12 is exercised on them.
  • the magnetic device 12 serves as a holding device 12 and is assigned to the opener 5.
  • the magnet device has two permanent magnets 13, 14. She is therefore designed as a permanent magnet device. One each the permanent magnet 13, 14 acts on one of two end regions 15, 16 of the contact bridge 8.
  • the contact bridge 8 exists at least partially of a ferromagnetic material. In particular, the contact bridge 8 has a rear side 17, which faces away from the counter-contacts 9 and from a ferromagnetic Material exists.
  • the reset element 10 and the magnetic device 12 are matched to each other and the intermediate lifting position Z1 selected such that in the intermediate lifting position Z1 exerted by the magnetic device 12 on the contact bridge 8 magnetic force is greater than the restoring force, which the restoring element 10 exerts on the contact bridge 8.
  • the magnet device 12 therefore transfers the contact bridge from the intermediate lifting position Z1 to an open position, in which the contact bridge 8 bears against the permanent magnets 13, 14 and is lifted from the counter contacts 9.
  • the contact driver 3 When the holding current I H drops below a minimum value (switching device switched off, supply voltage drops), the restoring force outweighs the holding torque applied by the drive coil 1. As a result, the contact driver 3 is moved from the actuation position B to the rest position R.
  • the contact driver 3 has a closing driving element 18.
  • the closing driver element 18 moves the contact bridge 8 towards the counter contacts 9 when the contact driver 3 is moved into the rest position R.
  • the contact bridge 8 is only lifted from the magnet device 12 when the contact driver 3 reaches a closing driving position M2.
  • the contact bridge 8 is previously held in the open position by the magnet device 12. Only then is the contact bridge 8 moved towards the counter contacts 9.
  • the closing driving element is 18 arranged such that it is the contact bridge 8th down to an intermediate lowering position Z2 from the open position deflects.
  • the intermediate lowering position Z2 the the restoring force exerted by the restoring element 10 the magnetic device 12 applied magnetic force.
  • the reset element 10 therefore lowers the contact bridge 8 from the intermediate lowering position Z2 on the counter contacts 9.
  • FIG. 5 shows a displacement path s of the contact driver to the right 3 plotted, a distance a of the contact bridge upwards 8 from the mating contacts 9.
  • the contact driver 3 from the rest position R in the operating position B and be transferred back.
  • the switching behavior of the opener 5 a clear hysteresis. It can also be seen that the opening of the opener 5 before reaching actuation position B and closing of the opener 5 takes place before reaching the rest position R. and that the opening driving position M1 closer to the actuating position B of Kunststoffmitrehmers 3 lies as that Locking position M2.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Valve Device For Special Equipments (AREA)

Description

Die vorliegende Erfindung betrifft ein elektromagnetisches Schaltgerät mit mindestens einer Antriebsspule, die bei Beaufschlagung mit einem Anzugsstrom einen Kontaktmitnehmer aus einer Ruhestellung in eine Betätigungsstellung verschiebt, wobei der Kontaktmitnehmer ein Öffnungsmitnahmeelement aufweist, mittels dessen beim Verschieben des Kontaktmitnehmers in die Betätigungsstellung bei Erreichen einer zwischen der Ruhestellung und der Betätigungsstellung liegenden Öffnungsmitnahmestellung eine Kontaktbrücke eines Öffners von Gegenkontakten des Öffners abgehoben wird.The present invention relates to an electromagnetic Switchgear with at least one drive coil, when applied a contact driver with a starting current moves from a rest position into an actuation position, wherein the contact driver has an opening driving element, by means of this when moving the contact carrier in the operating position when reaching between the Rest position and the operating position lying open driving position a contact bridge of an opener of counter contacts the opener is lifted off.

Ein derartiges elektromagnetisches Schaltgerät ist allgemein bekannt.Such an electromagnetic switching device is general known.

Im Stand der Technik wird die Kontaktbrücke auch in der Betätigungsstellung ständig über ein Rückstellelement gegen das Öffnungsmitnahmeelement angedrückt. Beim Rücküberführen des Kontaktmitnehmers in die Ruhestellung wird die Kontaktbrücke daher bei Erreichen der Öffnungsmitnahmestellung wieder auf die Gegenkontakte abgesenkt. Bei manchen Anwendungen aber ist ein derartiges Absenken bei Erreichen der Öffnungsmitnahmestellung unerwünscht. Vielmehr sollte das Schaltverhalten des Öffners eine Hysterese aufweisen.In the prior art, the contact bridge is also in the actuation position constantly against a reset element Opening driver element pressed. When returning the The contact bridge in the rest position is the contact bridge therefore when the opening take-off position is reached again the counter contacts lowered. But in some applications such a lowering when the opening driving position is reached undesirable. Rather, the switching behavior of the Have a hysteresis.

Ein Beispiel einer Anwendung, bei der das Schaltverhalten des Öffners eine Hysterese aufweisen sollte, ist eine Sparschaltung für die Antriebsspule: Wenn mittels des Öffners eine Umschaltung von Anzugs- auf Haltestrom erfolgt, ist der benötigte Haltestrom besonders klein, wenn der Öffner erst kurz vor dem Erreichen der Betätigungsstellung geöffnet wird. Bei einem in der Praxis durchaus vorkommenden Spannungseinbruch (kurzfristiger Spannungsausfall oder Spannungsrückgang) kann dies dazu führen, daß aufgrund des dann sinkenden Haltestroms die Betätigungsstellung verlassen wird und dadurch zu schaltende Hauptkontakte öffnen.An example of an application in which the switching behavior of the Normally closed should have a hysteresis is an economy circuit For the drive coil: If a changeover is made using the NC contact from tightening to holding current is the required one Holding current is particularly small if the break contact is only brief is opened before reaching the actuation position. at a voltage drop that occurs in practice (short-term voltage failure or voltage drop) can this cause that due to the then falling holding current the actuation position is left and thereby to be switched Open main contacts.

Wenn nun eine hysteresefreie Umschaltung des Öffners erfolgt, wird bei Erreichen der Öffnungsmitnahmestellung der Öffner wieder geschlossen und somit die Antriebsspule sofort wieder mit dem Anzugsstrom beaufschlagt. Dadurch erfolgt ein Wiederanziehen des Kontaktmitnehmers und somit wieder ein Öffnen des Öffners. Aufgrund dieser dauernden Umschaltung des Stromes, mit dem die Antriebsspule beaufschlagt wird, kann es geschehen, daß die Hauptkontakte flattern oder drucklos aneinander anliegen. Dies führt zu einem großen Verschleiß der Hauptkontakte, eventuell sogar zu einer Verschweißung der Hauptkontakte.If the NC contact is switched without hysteresis, becomes the opener when the opening driving position is reached closed again and thus the drive coil immediately again acted upon by the starting current. This results in a tightening of the contact person and thus opening again of the opener. Because of this constant switching of the current, with which the drive coil is loaded, it can happen that the main contacts flutter or against each other without pressure issue. This leads to great wear and tear on the Main contacts, possibly even to weld the Main contacts.

Wenn hingegen eine hysteresebehaftete Umschaltung des Öffners erfolgt, führt ein Spannungseinbruch nur entweder zu einem Abfallen der Hauptkontakte oder zu einem Wiedereinschalten des Schützes nach Spannungswiederkehr. Ein Flattern bzw. druckloses Aneinanderanliegen der Hauptkontakte aber wird vermieden.If, on the other hand, there is a hysteresis switchover of the NC contact voltage drop leads to either only one The main contacts drop out or switch on again of the contactor after voltage recovery. A flutter or pressure-free contact of the main contacts avoided.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein elektromagnetisches Schaltgerät zu schaffen, bei dem der Öffner mit einer Hysterese betreibbar ist.The object of the present invention is an electromagnetic To create switching device in which the break contact can be operated with a hysteresis.

Die Aufgabe wird dadurch gelöst, daß der Kontaktmitnehmer ein Schließmitnahmeelement aufweist, mittels dessen beim Verschieben des Kontaktmitnehmers in die Ruhestellung bei Erreichen einer zwischen der Ruhestellung und der Öffnungsmitnahmestellung liegenden Schließmitnahmestellung die Kontaktbrücke auf die Gegenkontakte zu bewegt wird und daß dem Öffner eine Haltevorrichtung zugeordnet ist, die die Kontaktbrücke in einer Öffnungsstellung hält, in der die Kontaktbrücke von den Gegenkontakten abgehoben ist, solange der Kontaktmitnehmer von der Öffnungsmitnahmestellung zur Schließmitnahmestellung verschoben wird. The object is achieved in that the contact driver Has locking driving element, by means of which when moving of the contact person in the rest position when reached one between the inoperative position and the open driving position lying contact position the contact bridge is moved to the counter contacts and that the opener a holding device is assigned to the contact bridge holds in an open position in which the contact bridge from the counter contacts is lifted as long as the contact driver from the opening driving position to the closing driving position is moved.

Die Haltevorrichtung ist besonders einfach gestaltet, wenn die Haltevorrichtung als Magnetvorrichtung ausgebildet ist und die Kontaktbrücke zumindest teilweise aus einem ferromagnetischen Material besteht.The holding device is particularly simple if the holding device is designed as a magnetic device and the contact bridge is at least partially made of a ferromagnetic Material exists.

Wenn die Magnetvorrichtung als Dauermagnetvorrichtung ausgebildet ist, ist die Magnetvorrichtung besonders wirksam.If the magnet device is designed as a permanent magnet device is, the magnetic device is particularly effective.

Wenn die Magnetvorrichtung zwei Magnete aufweist und je einer der Magnete auf je einen von zwei Endbereichen der Kontaktbrücke wirkt, ist die Magnetvorrichtung konstruktiv besonders einfach ausgebildet. Darüber hinaus wirkt das von der Magnetvorrichtung hervorgerufene Streufeld als Blasfeld für etwaige entstehende Lichtbögen beim Abheben der Kontaktbrücke von den Gegenkontakten.If the magnet device has two magnets and one each the magnets on one of two end areas of the contact bridge acts, the magnetic device is structurally special simply trained. In addition, this works from the magnetic device created stray field as a blowing field for any arcs that occur when the contact bridge is lifted off the Mating contacts.

Wenn die Kontaktbrücke eine von den Gegenkontakten abgewandte Rückseite aufweist, die aus einem ferromagnetischen Material besteht, übt die Magnetvorrichtung auf die Kontaktbrücke eine Anzugs- und Haltekraft aus. Dies ist insbesondere bei erschütterungsgefährdeten Anwendungen von Bedeutung.If the contact bridge is facing away from the mating contacts Back, which is made of a ferromagnetic material exists, the magnetic device exercises on the contact bridge Tightening and holding force. This is particularly true for those at risk of vibration Applications of importance.

Wenn das Öffnungsmitnahmeelement derart angeordnet ist, daß es die Kontaktbrücke bis in eine Abhebezwischenstellung von den Gegenkontakten abhebt, und die Haltevorrichtung derart ausgebildet ist, daß sie die Kontaktbrücke aus der Abhebezwischenstellung in die Öffnungsstellung überführt, wird auf einfache Weise die Gefahr von Beschädigungen der Kontaktbrücke beim Überführen in die Öffnungsstellung vermieden.If the opening driving element is arranged such that the contact bridge to an intermediate lifting position of the counter contacts, and the holding device in such a way is designed so that the contact bridge from the intermediate lifting position is transferred to the open position simple way the risk of damage to the contact bridge avoided when transferring to the open position.

Wenn das Schließmitnahmeelement derart angeordnet ist, daß es die Kontaktbrücke bis in eine Absenkzwischenstellung aus der Öffnungsstellung auslenkt, und der Kontaktbrücke ein Rückstellelement zugeordnet ist, das die Kontaktbrücke aus der Absenkzwischenstellung auf die Gegenkontakte absenkt, wird auf einfache Weise die Gefahr von Beschädigungen der Kontaktbrücke beim Absenken auf die Gegenkontakte vermieden. If the closing driving element is arranged such that it the contact bridge into an intermediate lowering position from the Deflects open position, and the contact bridge a reset element is assigned that the contact bridge from the Lower intermediate position is lowered to the counter contacts in a simple way the risk of damage to the contact bridge avoided when lowering onto the counter contacts.

Das Rückstellelement ist im einfachsten Fall als Rückstellfeder ausgebildet. Die Rückstellfeder kann sich beispielsweise einerseits an der Kontaktbrücke und andererseits an einem bezüglich des Schaltgeräts ortsfesten Lager abstützen.In the simplest case, the return element is a return spring educated. The return spring can, for example on the one hand on the contact bridge and on the other hand in relation to one support of the switchgear stationary bearing.

Wenn der Öffner mit einer Stromeinstelleinrichtung für die Antriebsspule derart verbunden ist, daß beim Öffen bzw. Schließen des Öffners eine Änderung des Stromes erfolgt, mit dem die Antriebsspule beaufschlagt wird, ergibt sich auf besonders einfache Weise ein Umschalten des elektromagnetischen Schaltgeräts von Anzugs- auf Haltestrom. Insbesondere ist es mit dieser Anordnung möglich, das Schaltgerät erst kurz vor Erreichen der Betätigungsstellung von Anzugs- auf Haltestrom umzuschalten und den Anzugsstrom erst kurz vor Erreichen der Ruhestellung wieder zuzuschalten. Dabei ist trotz des Abhebens der Kontaktbrücke von den Gegenkontakten erst kurz vor Erreichen der Betätigungsstellung ein großer Abstand der Kontaktbrücke von den Gegenkontakten erreichbar, so daß keine Gefahr eines nichtlöschenden Lichtbogens besteht.If the break contact has a current setting device for the Drive coil is connected such that when opening or Closing the opener, the current is changed with which is applied to the drive coil results in particular simple way of switching the electromagnetic Switchgear from pull-in to holding current. In particular it is possible with this arrangement, the switching device just before Reaching the actuation position from tightening to holding current switch and the starting current just before reaching the Switch on the rest position again. It is despite taking off the contact bridge from the mating contacts just before Reaching the actuation position a large distance of the contact bridge reachable from the counter contacts, so that none There is a risk of a non-extinguishing arc.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigen in Prinzipdarstellung

FIG 1
ein elektromagnetisches Schaltgerät mit einer Stromeinstelleinrichtung,
FIG 2
ein Schaltgerät mit einem Kontaktmitnehmer in Ruhestellung,
FIG 3
ein Schaltgerät mit einem Kontaktmitnehmer in Betätigungsstellung,
FIG 4
das Schaltgerät von FIG 1 von oben und
FIG 5
ein Hysteresediagramm.
Further advantages and details emerge from the following description of an exemplary embodiment. Show in principle
FIG. 1
an electromagnetic switching device with a current setting device,
FIG 2
a switching device with a contact carrier in the rest position,
FIG 3
a switching device with a contact driver in the actuation position,
FIG 4
the switching device of Figure 1 from above and
FIG 5
a hysteresis diagram.

Gemäß FIG 1 weist ein elektromagnetisches Schaltgerät eine Antriebsspule 1 auf. Wenn einer Stromeinstelleinrichtung 2 für die Antriebsspule 1 ein Betätigungsbefehl vorgegeben wird, beaufschlagt die Stromeinstelleinrichtung 2 die Antriebsspule 1 mit einem Strom I. Der Strom I weist dabei mindestens die Größe eines Anzugsstroms IA auf. Dadurch wird ein - in FIG 1 nur schematisch dargestellter - Kontaktmitnehmer 3 aus einer Ruhestellung R in eine Betätigungsstellung B verschoben.According to FIG. 1, an electromagnetic switching device has a drive coil 1. If an actuation command is given to a current setting device 2 for the drive coil 1, the current setting device 2 applies a current I to the drive coil 1. The current I is at least the size of a starting current I A. As a result, a contact driver 3 - shown only schematically in FIG. 1 - is moved from a rest position R into an actuation position B.

Zu Beginn des Verschiebevorgangs ist ein Hauptkontakt 4 des Schaltgeräts unbetätigt und ein Öffner 5 geschlossen. Durch das Verschieben des Kontaktmitnehmers 3 werden der Hauptkontakt 4 betätigt und der Öffner 5 geöffnet.At the beginning of the displacement process, a main contact 4 of the Switching device not actuated and a break contact 5 closed. By moving the contact driver 3 become the main contact 4 pressed and the opener 5 opened.

Der Öffner 5 überbrückt einen Widerstand 6. Beim Öffnen des Öffners 5 ist die Antriebsspule 1 damit nur noch über den Widerstand 6, nicht mehr aber widerstandslos über den Öffner 5, mit der Stromeinstelleinrichtung 2 verbunden. Daher sinkt beim Öffnen des Öffners 5 der Strom I auf einen Haltestrom IH ab. Umgekehrt steigt der Strom I beim Schließen des Öffners 5 wieder auf den Anzugsstrom IA an. Der Öffner 5 ist also mit der Stromeinstelleinrichtung 2 derart verbunden, daß beim Öffnen bzw. Schließen des Öffners 5 eine Änderung des Stromes I, mit dem die Antriebsspule 1 beaufschlagt wird, erfolgt.The opener 5 bridges a resistor 6. When the opener 5 is opened, the drive coil 1 is therefore only connected to the current setting device 2 via the resistor 6, but no longer without resistance via the opener 5. Therefore, the current I drops to a holding current I H when the opener 5 is opened. Conversely, when the opener 5 closes, the current I increases again to the starting current I A. The opener 5 is thus connected to the current setting device 2 in such a way that when the opener 5 is opened or closed a change in the current I with which the drive coil 1 is applied takes place.

Gemäß den FIG 2 bis 4 weist der Kontaktmitnehmer 3 ein Öffnungsmitnahmeelement 7 auf. Das Öffnungsmitnahmeelement 7 ist gemäß Ausführungsbeispiel als Mitnahmefläche ausgebildet. Mittels des Öffnungsmitnahmeelements 7 wird eine Kontaktbrücke 8 des Öffners 5 von Gegenkontakten 9 des Öffners 5 abgehoben, wenn der Kontaktmitnehmer 3 in die Betätigungsstellung B verschoben wird. Die Kontaktbrücke 8 wird dabei erst dann von den Gegenkontakten 9 abgehoben, wenn der Kontaktmitnehmer 3 eine Öffnungsmitnahmestellung M1 erreicht.According to FIGS 2 to 4, the contact driver 3 has an opening driving element 7 on. The opening driving element 7 is formed as a driving surface according to the embodiment. A contact bridge is formed by means of the opening driving element 7 8 of the opener 5 is lifted from counter contacts 9 of the opener 5, when the contact driver 3 in the operating position B is moved. The contact bridge 8 is only then lifted from the mating contacts 9 when the contact driver 3 reaches an opening driving position M1.

Das Abheben der Kontaktbrücke 8 erfolgt gegen die Kraft eines Rückstellelements 10, das gemäß den FIG 2 bis 4 als Rückstellfeder ausgebildet ist. Die Rückstellfeder 10 stützt sich dabei einerseits an der Kontaktbrücke 8 und andererseits an einem Lager 11 ab, das bezüglich des Schaltgeräts ortsfest ist. Zur Seite hin ist die Rückstellfeder 10 durch geeignete, allgemein bekannte Führungselemente geführt. Diese sind daher der besseren Übersichtlichkeit halber nicht dargestellt.The contact bridge 8 is lifted off against the force of a Reset element 10, which is shown in FIGS 2 to 4 as a return spring is trained. The return spring 10 is supported on the one hand on the contact bridge 8 and on the other a bearing 11, which is stationary with respect to the switching device is. The return spring 10 is to the side by suitable, generally known guide elements performed. Therefore, these are not shown for the sake of clarity.

Wie aus FIG 3 ersichtlich ist, ist das Öffnungsmitnahmeelement 7 derart angeordnet, daß es die Kontaktbrücke 8 bis in eine Abhebezwischenstellung Z1 abhebt. Wenn die Kontaktbrücke 8 die Abhebezwischenstellung Z1 erreicht hat, ist sie einer magnetischen Kraft ausgesetzt, die von einer Magnetvorrichtung 12 auf sie ausgeübt wird. Die Magnetvorrichtung 12 dient als Haltevorrichtung 12 und ist dem Öffner 5 zugeordnet.As can be seen from FIG 3, the opening driving element 7 arranged such that it is the contact bridge 8 in an intermediate lifting position Z1 lifts off. If the contact bridge 8 has reached the intermediate lifting position Z1, it is one exposed to magnetic force from a magnetic device 12 is exercised on them. The magnetic device 12 serves as a holding device 12 and is assigned to the opener 5.

Die Magnetvorrichtung weist zwei Dauermagnete 13, 14 auf. Sie ist daher als Dauermagnetvorrichtung ausgebildet. Je einer der Dauermagnete 13, 14 wirkt auf je einen von zwei Endbereichen 15, 16 der Kontaktbrücke 8. Die Kontaktbrücke 8 besteht zumindest teilweise aus einem ferromagnetischen Material. Insbesondere weist die Kontaktbrücke 8 eine Rückseite 17 auf, die von den Gegenkontakten 9 abgewandt ist und aus einem ferromagnetischen Material besteht.The magnet device has two permanent magnets 13, 14. she is therefore designed as a permanent magnet device. One each the permanent magnet 13, 14 acts on one of two end regions 15, 16 of the contact bridge 8. The contact bridge 8 exists at least partially of a ferromagnetic material. In particular, the contact bridge 8 has a rear side 17, which faces away from the counter-contacts 9 and from a ferromagnetic Material exists.

Das Rückstellelement 10 und die Magnetvorrichtung 12 sind derart aufeinander abgestimmt und die Abhebezwischenstellung Z1 derart gewählt, daß in der Abhebezwischenstellung Z1 die von der Magnetvorrichtung 12 auf die Kontaktbrücke 8 ausgeübte magnetische Kraft größer ist als die Rückstellkraft, welche das Rückstellelement 10 auf die Kontaktbrücke 8 ausübt. Die Magnetvorrichtung 12 überführt daher die Kontaktbrücke aus der Abhebezwischenstellung Z1 in eine Öffnungsstellung, in der die Kontaktbrücke 8 an den Dauermagneten 13, 14 anliegt und von den Gegenkontakten 9 abgehoben ist.The reset element 10 and the magnetic device 12 are matched to each other and the intermediate lifting position Z1 selected such that in the intermediate lifting position Z1 exerted by the magnetic device 12 on the contact bridge 8 magnetic force is greater than the restoring force, which the restoring element 10 exerts on the contact bridge 8. The magnet device 12 therefore transfers the contact bridge from the intermediate lifting position Z1 to an open position, in which the contact bridge 8 bears against the permanent magnets 13, 14 and is lifted from the counter contacts 9.

Beim Absinken des Haltestromes IH unter einen Minimalwert (Ausschalten des Schaltgeräts, Absinken der Versorgungsspannung) überwiegt die Rückstellkraft das von der Antriebsspule 1 aufgebrachte Haltemoment. In der Folge wird der Kontaktmitnehmer 3 aus der Betätigungsstellung B auf die Ruhestellung R zu bewegt. Der Kontaktmitnehmer 3 weist ein Schließmitnahmeelement 18 auf. Das Schließmitnahmeelement 18 bewegt beim Verschieben des Kontaktmitnehmers 3 in die Ruhestellung R die Kontaktbrücke 8 auf die Gegenkontakte 9 zu. Die Kontaktbrücke 8 wird aber erst dann von der Magnetvorrichtung 12 abgehoben, wenn der Kontaktmitnehmer 3 eine Schließmitnahmestellung M2 erreicht. Zuvor wird die Kontaktbrücke 8 von der Magnetvorrichtung 12 in der Öffnungsstellung gehalten. Erst danach wird die Kontaktbrücke 8 auf die Gegenkontakte 9 zu bewegt.When the holding current I H drops below a minimum value (switching device switched off, supply voltage drops), the restoring force outweighs the holding torque applied by the drive coil 1. As a result, the contact driver 3 is moved from the actuation position B to the rest position R. The contact driver 3 has a closing driving element 18. The closing driver element 18 moves the contact bridge 8 towards the counter contacts 9 when the contact driver 3 is moved into the rest position R. However, the contact bridge 8 is only lifted from the magnet device 12 when the contact driver 3 reaches a closing driving position M2. The contact bridge 8 is previously held in the open position by the magnet device 12. Only then is the contact bridge 8 moved towards the counter contacts 9.

Wie aus den FIG 2 und 4 ersichtlich ist, ist das Schließmitnahmeelement 18 derart angeordnet, daß es die Kontaktbrücke 8 bis in eine Absenkzwischenstellung Z2 aus der Öffnungsstellung auslenkt. In der Absenkzwischenstellung Z2 überwiegt die von dem Rückstellelement 10 ausgeübte Rückstellkraft die von der Magnetvorrichtung 12 ausgeübte Magnetkraft. Das Rückstellelement 10 senkt daher die Kontaktbrücke 8 aus der Absenkzwischenstellung Z2 auf die Gegenkontakte 9 ab.As can be seen from FIGS. 2 and 4, the closing driving element is 18 arranged such that it is the contact bridge 8th down to an intermediate lowering position Z2 from the open position deflects. In the intermediate lowering position Z2, the the restoring force exerted by the restoring element 10 the magnetic device 12 applied magnetic force. The reset element 10 therefore lowers the contact bridge 8 from the intermediate lowering position Z2 on the counter contacts 9.

In FIG 5 ist nach rechts ein Verschiebeweg s des Kontaktmitnehmers 3 aufgetragen, nach oben ein Abstand a der Kontaktbrücke 8 von den Gegenkontakten 9. Wie aus FIG 5 ersichtlich ist, kann der Kontaktmitnehmer 3 von der Ruhestellung R in die Betätigungsstellung B und zurück überführt werden. Dabei zeigt das Schaltverhalten des Öffners 5 eine deutliche Hysterese. Ferner ist ersichtlich, daß das Öffnen des Öffners 5 vor dem Erreichen der Betätigungsstellung B und das Schließen des Öffners 5 vor dem Erreichen der Ruhestellung R erfolgt sowie daß die Öffnungsmitnahmestellung M1 näher an der Betätigungsstellung B des Kontaktmitrehmers 3 liegt als die Schließmitnahmestellung M2.5 shows a displacement path s of the contact driver to the right 3 plotted, a distance a of the contact bridge upwards 8 from the mating contacts 9. As can be seen from FIG. 5 is, the contact driver 3 from the rest position R in the operating position B and be transferred back. there shows the switching behavior of the opener 5 a clear hysteresis. It can also be seen that the opening of the opener 5 before reaching actuation position B and closing of the opener 5 takes place before reaching the rest position R. and that the opening driving position M1 closer to the actuating position B of Kontaktmitrehmers 3 lies as that Locking position M2.

Claims (10)

  1. Electromagnetic switching device with at least one drive coil (1), that moves a contact driver (3) from an off position (R) to an operated position (B) when a pickup current (IA) is applied, with the contact driver (3) having a break driver element (7) by means of which, when the contact driver (3) is moved to the operated position (B), a contact bridge (8) of a break contact (5) is lifted off mating contacts (9) of the break contact (5) when a break driver position (M1) lying between the off position (R) and the operated position (B) is reached,
    characterised in that
    the contact driver (3) has a make driver element (18) by means of which, when the contact driver (3) is moved to the off position (R), the contact bridge (8) is moved onto the mating contacts (9) when a make driver position (M2) lying between the off position (R) and the break driver position (M1) is reached, and in that a retaining device (12) is assigned to the break contact (5) and holds the contact bridge (8) in an open position in which the contact bridge (8) is lifted off the mating contacts (9) as long as the contact driver (3) is being moved from the break driver position (M1) to the make driver position (M2).
  2. Switching device according to Claim 1,
    characterised in that
    the retaining device (12) is designed as a magnet device (12) and that the contact bridge (8) consists at least partially of a ferromagnetic material.
  3. Switching device according to Claim 2,
    characterised in that
    the magnet device (12) is designed as a permanent-magnet device (12).
  4. Switching device according to Claim 2 or 3,
    characterised in that
    the magnet device (12) has two magnets (13, 14) and that in each case one of the magnets (13, 14) acts on one of two end areas (15, 16) of the contact bridge (18).
  5. Switching device according to Claim 2, 3 or 4,
    characterised in that
    the contact bridge (8) has a rear face (17) consisting of ferromagnetic material, turned away from the mating contacts (9).
  6. Switching device according to one of the above claims,
    characterised in that
    the break driver element (7) is arranged such that it lifts the contact bridge (8) off the mating contacts (9) to an intermediate lift-off position (Z1), and in that the retaining device (12) is designed such that it transfers the contact bridge (8) from the intermediate lift-off position (Z1) to the open position.
  7. Switching device according to one of the above claims,
    characterised in that
    the make driver element (18) is arranged such that it deflects the contact bridge (8) from the open position to an intermediate lowered position (Z2), and in that a resetting element (10) that lowers the contact bridge (8) from the intermediate lowered position (Z2) onto the mating contacts (9) is assigned to the contact bridge (8).
  8. Switching device according to Claim 7,
    characterised in that
    the resetting element (10) is designed as a return spring (10).
  9. Switching device according to Claim 8,
    characterised in that
    the return spring (10) rests at one end on the contact bridge (8) and at the other end on a bearing (11) that is fixed relative to the switch device.
  10. Switching device according to one of the above claims,
    characterised in that
    the break contact (5) is connected to a current setting device (2) for the drive coil (1) such that a change in the current (I) applied to the drive coil (1) takes place during the breaking or making of the break contact (5).
EP00963966A 1999-09-16 2000-09-06 Electromagnetic switchgear Expired - Lifetime EP1212772B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944462 1999-09-16
DE19944462A DE19944462C1 (en) 1999-09-16 1999-09-16 Electromagnetic switching device
PCT/DE2000/003076 WO2001020632A1 (en) 1999-09-16 2000-09-06 Electromagnetic switchgear

Publications (2)

Publication Number Publication Date
EP1212772A1 EP1212772A1 (en) 2002-06-12
EP1212772B1 true EP1212772B1 (en) 2003-08-06

Family

ID=7922276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00963966A Expired - Lifetime EP1212772B1 (en) 1999-09-16 2000-09-06 Electromagnetic switchgear

Country Status (4)

Country Link
EP (1) EP1212772B1 (en)
CN (1) CN1214427C (en)
DE (2) DE19944462C1 (en)
WO (1) WO2001020632A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854492B1 (en) * 2003-04-29 2008-10-17 Schneider Electric Ind Sas CONTROL DEVICE HYSTERESIS

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713055A (en) * 1971-06-25 1973-01-23 Cutler Hammer Inc Auxiliary contact system for electromagnetic switching devices
DE3433838C2 (en) * 1983-09-19 1993-10-14 Mitsubishi Electric Corp Switchgear
FR2588691B1 (en) * 1985-10-14 1990-11-30 Hager Electro IMPROVEMENT WITH ELECTRICAL SWITCHES
DE3540460A1 (en) * 1985-11-14 1987-05-21 Siemens Ag ELECTROMAGNETIC SWITCHGEAR

Also Published As

Publication number Publication date
DE50003215D1 (en) 2003-09-11
CN1214427C (en) 2005-08-10
EP1212772A1 (en) 2002-06-12
CN1372693A (en) 2002-10-02
DE19944462C1 (en) 2001-05-31
WO2001020632A1 (en) 2001-03-22

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