EP2105941B1 - Installation switching device with a double interruption - Google Patents

Installation switching device with a double interruption Download PDF

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Publication number
EP2105941B1
EP2105941B1 EP09001939A EP09001939A EP2105941B1 EP 2105941 B1 EP2105941 B1 EP 2105941B1 EP 09001939 A EP09001939 A EP 09001939A EP 09001939 A EP09001939 A EP 09001939A EP 2105941 B1 EP2105941 B1 EP 2105941B1
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EP
European Patent Office
Prior art keywords
contact
contact bridge
switching device
limbs
pusher
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.)
Active
Application number
EP09001939A
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German (de)
French (fr)
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EP2105941A2 (en
EP2105941A3 (en
Inventor
Frank Hustert
Ralph Burkhardt
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ABB AG Germany
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ABB AG Germany
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Publication of EP2105941A2 publication Critical patent/EP2105941A2/en
Publication of EP2105941A3 publication Critical patent/EP2105941A3/en
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Publication of EP2105941B1 publication Critical patent/EP2105941B1/en
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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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • 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
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
    • 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
    • H01H77/102—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 characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—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 characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position

Definitions

  • the invention relates to a service switching device with a double break, a contact bridge, which is spent by a striker against the pressure of a contact spring in a Ausschaltesch in the open position, for at least one Polstrompfad, operable by a switch lock pusher, in which the striker is guided the contact bridge is received in a slot formed by two legs projecting in the same direction and of the pusher, according to the preamble of claim 1.
  • Generic service switching devices such as motor protection switch, have at least one Polstrompfad with a double contact point and two fixed contact pieces and two arranged on a movable contact bridge movable contact pieces.
  • the contact bridge is acted upon by means of a pusher in the opening direction and a contact pressure spring in the closing direction.
  • generic installation switching devices include an electromagnetic release whose armature strikes the contact bridge in the opening direction when a short-circuit current occurs in the pole current path via the pusher as well as the latching point of a Unlocks switching mechanism, so that the switching mechanism via a knuckle the contact bridge permanently applied against the force of the contact pressure spring opening.
  • the follower pin lagging slider can slow this counter-movement of the contact bridge, so that the contact bridge is prevented from closing the contacts before the active lever, which lags the striker pin still further due to the greater mechanical inertia of the switching mechanism, finally the contact bridge permanently over the slide in open position.
  • the invention is therefore characterized in that the distance between the two legs to each other tapers towards the free end, wherein the distance at the free end is less than the width of the contact bridge, so that they can jam in an elimination between the legs. This results in a clamping region at the free end of the legs, and in the region between the free end of the legs and the point of attachment of the legs to the pusher, a guide region is created, in which the contact bridge is movably guided.
  • the legs are resiliently formed.
  • they can be bent towards one another toward the free end. You could also be in the region of their free ends V-shaped angled towards each other.
  • the advantageous effect of the design according to the invention of a generic service switching device is that when the contact bridge hits the latter, it is jammed between the legs of the pusher and, as a result, the contact bridge bounces too early in the direction of the closed position is prevented. If the contact bridge is clamped, it can only move along with the pusher.
  • means are provided, which can spend the contact bridge again free of the legs due to a movement of the pusher. This is helpful if, after opening the contact bridge, for example when the short circuit has subsided, the service switching device is to be switched on again by a reclosing operation.
  • the above-mentioned means are a web or a pin, against which the contact bridge in Ausschaltwolf applies, so that upon further movement of the pusher of the web or the pin in the direction of elimination, the contact bridge free again from the thighs spends.
  • This further movement of the pusher can take place when resetting, for example, that the pusher is pressed by the active lever a little further in the direction of the open position.
  • the contact bridge can no longer follow this further movement of the pusher, and it is thereby spent against the clamping frictional force relative to the direction of longitudinal extension of the legs back into the guide portion of the slot, where they return to their Closing position can be pressed.
  • a further advantageous embodiment may be provided as a means and a spring which moves the contact bridge in the off position from the clamping area between the legs with further movement of the pusher, so that the contact bridge is spent in the guide area free of the legs. Unclamping of the contact bridge by the spring happens when the restoring force of the compressed spring is greater than the clamping force exerted by the legs on the contact bridge.
  • FIGS. 1 to 4 each identical or equivalent elements or assemblies are each denoted by the same reference numerals.
  • the Fig. 1 shows an inventive switching device 1 with a Polstrompfad 2 between an input terminal 3 and an output terminal 4. It could for example be a Polstrompfad a three-pole motor protection switch, the other two Polstrompfade are constructed appropriately, but not shown here.
  • the Polstrompfad 2 comprises two fixed contact pieces 5, 6 and two arranged on a movable contact bridge 7 movable contact pieces 8, 9, through which a contact point 10 is formed with double interruption.
  • the contact bridge 7 is acted upon by a contact pressure spring 11 in the closing direction, see directional arrow S.
  • a pusher 12 which engages the contact pressure spring 11 opposite side of the contact bridge 7, this can be applied in the opening direction, see direction arrow O.
  • the Polstrompfad 2 still includes only for the sake of completeness with illustrated thermal release 113 and an electromagnetic release 13 with a movable armature, which in the case of a occurring in the Polstrompfad 2 short-circuit current due to electrodynamic forces on the pusher 12, the contact bridge 7 opens in the opening direction, indicated by the action line 14.
  • the armature of the electromagnetic release 13 acts in the event of a short circuit on a switching mechanism 15 and unlocks its Verklinkungsstelle, indicated by the action line 16, so that the switching mechanism 15 in the unlatched state via an active lever 17, indicated by the action line 18, the pusher 12 permanently applied in the opening direction of the contact bridge 7.
  • At high short-circuit currents and an electrodynamic opening of the double pad 10 may occur due to the current flow in the Polstrompfad.
  • thermal release 113 which also acts in the case of an overcurrent on the switching mechanism 15, indicated by the action line 114, is known in principle and not the subject of the present invention.
  • the mechanical system comprising the switching mechanism 15 and the active lever 17 may be, for example, a toggle lever system with a two-stage latch.
  • the active lever 17 is designed as a double arm, the first acted upon by the switching mechanism 15 lever arm 171 and the second, cooperating with the pusher 12 lever arm 172 form an obtuse angle with each other and is rotatably mounted in a stationary axis of rotation 173, whereby the active lever 17 acts as a lever.
  • the active lever could also have a different shape.
  • This mechanical system just described has a certain mechanical inertia, which after unlatching a certain time, for example, 3 ms, passes before the active lever 17 hits the pusher 12 to apply this permanently in the opening direction.
  • the time to the direct opening of the contact bridge 7 by the here acting as a hammer armature armature of the electromagnetic release 13 is much shorter; for example, it is only 1 ms.
  • the pusher 12 is according to the embodiment of the DE 10 2006 055 007.2 designed in two parts and includes a slider 19 and a striker 20. As in the sectional view of Fig. 1b can be seen, the pusher 12 is an elongated member having an approximately cylindrical basic shape.
  • the striking pin 20 is also in the closing or opening direction of the contact bridge 7 in a second, channel-like opening 22 in the slide 19 movably guided. It projects beyond the slide 19 in the direction of the point of the impact anchor.
  • a first shoulder 23 is formed, which serves as an upper stop for the contact bridge 7.
  • a second shoulder 24 is formed on the slide 19, which serves as a point of attack for the active lever 17.
  • the first opening 21 is formed by two fork-like projections or legs 30, 31 projecting in the longitudinal direction of the slider 19 and take the contact bridge 7 between them.
  • the free ends 32, 33 of the tines 30, 31 take between them a smaller distance A to each other than the distance A w at the shoulder 23.
  • the distance A is also less than the width B of the contact bridge 7.
  • the shape the legs 30, 31 shown slightly curved; Of course, it is also possible, the legs 30, 31 approximately at an angle in their midst, so that they form a V-shape in the region of the free ends.
  • a clamping area for clamping the contact bridge 7 and between the free ends 33, 32 and the first paragraph 23, where the legs 30, 31 attach to the pusher body, is formed Guide area for the contact bridge, in which it is moveable.
  • the Doppelutton 10 When entering the narrowed area takes the contact bridge 7 the slider 19 with a certain distance, wherein the slide 19, even if it is taken due to the return movement of the contact bridge 7 of this due to the friction (deadlock), then held by the active lever 17. In any case, the Doppelutton 10 remains open. It is essential that the distance of the narrowing of the tines or the opening 21 from the shoulder 23 is sufficiently large.
  • a pin 41 is integrally formed, which engages in the slot 21 partially.
  • the contact bridge 7 passes in the immediate vicinity of the end of the pin 41 and the contact bridge 7 can come by further depression of the slider 19 (for example, by a reset button) free of the projections, so that the contact bridge 7 is moved from the contact spring back into the closed position ,
  • a pin 41 may also be a compression spring 45, see Fig. 4 be provided, which is to be sized accordingly, so that they can overcome the frictional force when an engagement is made.
  • a further advantageous effect of the embodiment according to the invention also appears when the impact movement of the contact bridge should not be sufficient to beat it far enough into the clamping area that it is firmly clamped there. Because due to the curved inner contour of the slot, which is formed by the curved shape of the legs, arises even in a region which is still just above the clamping area, a certain friction between the contact bridge 7 and the inner sides of the legs 30,31. This is a transitional area between the guide area and the clamping area. Due to the friction between the contact bridge 7 and the legs 30, 31 in the intermediate region, the movement of the contact bridge 7 there is already slowed relative to the legs 30,31. This results in a delay in the movement of the contact bridge even if it should not be completely pressed into the clamping area. The delay thus achieved can already be sufficient to effectively avoid contact bounce.
  • the effect according to the invention described above also occurs when the opening of the contact bridge is initially not performed by the striker, but due to an electrodynamic repulsion between the fixed and movable contact pieces. Particularly at high current levels of a short-circuit current, the electrodynamic repulsion is faster than the reaction time of the electromagnetic release 13.
  • the armature of the electromagnetic release 13 therefore follows the electrodynamic repulsion of the contact point 10. But even if the contact bridge 7 is pressed down due to an electrodynamic repulsion in the clamping region of the slot 21, the clamping effect enters the clamping area, and thus the beneficial effect of delaying the rebound of the contact bridge.

Abstract

The electrical switching device (1) has a double contact point (10) and a contact bridge (7), which is passed by an impact pin (20) against the pressure of a contact pressure spring (11) during a striking operation in opened position. The distance of the two brackets is tapered to each other at free ends. The distance at the free ends is smaller than the width of the contact bridge such that the contact bridge is jammed during a disconnection between the brackets. A pusher (12) is operated by a latch (15), in which the impact pin is guided.

Description

Die Erfindung betrifft ein Installationsschaltgerät mit einer Doppelunterbrechung, einer Kontaktbrücke, die von einem Schlagstift entgegen dem Druck einer Kontaktdruckfeder bei einer Ausschalthandlung in Offenstellung verbracht wird, für wenigstens einen Polstrompfad, mit einem von einem Schaltschloss betätigbaren Drücker, in dem der Schlagstift geführt ist, wobei die Kontaktbrücke in einem durch zwei in gleiche Richtung vorspringende Schenkel gebildeten Schlitz des Drückers aufgenommen ist, gemäß dem Oberbegriff des Anspruches 1.The invention relates to a service switching device with a double break, a contact bridge, which is spent by a striker against the pressure of a contact spring in a Ausschaltehandlung in the open position, for at least one Polstrompfad, operable by a switch lock pusher, in which the striker is guided the contact bridge is received in a slot formed by two legs projecting in the same direction and of the pusher, according to the preamble of claim 1.

Gattungsgemäße Installationsschaltgeräte, beispielsweise Motorschutzschalter, weisen wenigstens einen Polstrompfad mit einer Doppelkontaktstelle und zwei feststehenden Kontaktstücken und zwei auf einer beweglichen Kontaktbrücke angeordneten beweglichen Kontaktstücken auf.Generic service switching devices, such as motor protection switch, have at least one Polstrompfad with a double contact point and two fixed contact pieces and two arranged on a movable contact bridge movable contact pieces.

Die Kontaktbrücke wird dabei mittels eines Drückers in Öffnungsrichtung und einer Kontaktdruckfeder in Schließrichtung beaufschlagt.The contact bridge is acted upon by means of a pusher in the opening direction and a contact pressure spring in the closing direction.

Weiter umfassen gattungsgemäße Installationsschaltgeräte einen elektromagnetischen Auslöser, dessen Anker bei Auftreten eines Kurzschlussstromes in dem Polstrompfad sowohl über den Drücker die Kontaktbrücke in Öffnungsrichtung aufschlägt als auch die Verklinkungsstelle eines Schaltschlosses entklinkt, so dass das Schaltschloss über einen Wirkhebel die Kontaktbrücke dauerhaft entgegen der Kraft der Kontaktdruckfeder öffnend beaufschlagt.Furthermore, generic installation switching devices include an electromagnetic release whose armature strikes the contact bridge in the opening direction when a short-circuit current occurs in the pole current path via the pusher as well as the latching point of a Unlocks switching mechanism, so that the switching mechanism via a knuckle the contact bridge permanently applied against the force of the contact pressure spring opening.

Unmittelbar nach dem Aufschlagen der Kontaktbrücke und damit dem Unterbrechen des Kurzschlussstromes in dem Polstrompfad bricht der elektrodynamische Rückstoß des elektromagnetischen Auslösers zusammen und die Kontaktbrücke wird durch die Kraft der Kontaktdruckfeder wieder in Richtung auf ihre Schließstellung hin beaufschlagt.Immediately after the strike of the contact bridge and thus the interruption of the short-circuit current in the Polstrompfad the electrodynamic recoil of the electromagnetic release collapses and the contact bridge is acted upon by the force of the contact pressure spring toward its closed position.

Aufgrund der größeren mechanischen Trägheit des Schaltschlosses, verglichen mit derjenigen des den Anker und den Drücker umfassenden Systems, eilt der Wirkhebel zur dauerhaften Offenhaltung der Kontakte durch das Schaltschloss der Drückerbewegung nach.Due to the greater mechanical inertia of the switching mechanism, compared with that of the system comprising the armature and the pusher, the active lever for the permanent keeping open of the contacts by the switching mechanism of the pusher movement hurries after.

Unter ungünstigen Bedingungen kann es vorkommen, dass die Kontakte durch die Kontaktdruckfeder bereits wieder geschlossen wurden, bevor das Schaltschloss über den Wirkhebel und den Drücker eine dauerhafte Öffnung bewirken kann. Man spricht dann vom Auftreten eines Kontaktprellens, welches unerwünscht ist.Under unfavorable conditions, it may happen that the contacts have already been closed again by the contact pressure spring, before the switch lock can cause a permanent opening via the active lever and the pusher. One then speaks of the occurrence of a contact bounce, which is undesirable.

Zur Vermeidung eines Kontaktprellens wird in der DE 10 2006 055 007.2 vorgeschlagen, als Drücker einen Schieber und einen Schlagstift zu verwenden, von denen der Schlagstift innerhalb des Schiebers geführt ist, wobei die Anordnung aus Schieber, Schlagstift, Kontaktbrücke, Wirkhebel und Anker so eingerichtet ist, dass im Kurzschlussfall der Anker den Schlagstift aufgrund dessen kleinen Masse sehr schnell beschleunigt und somit sehr schnell die Kontaktbrücke aufschlägt. Dabei eilt der Schieber dem Schlagstift nach, bevor der Wirkhebel über den Schieber die Kontaktbrücke entgegen der Kontaktdruckkraft dauerhaft in Offenstellung hält.To avoid a contact bounce is in the DE 10 2006 055 007.2 proposed to use as a pusher a slide and a striker, of which the striker is guided within the slider, the arrangement of slide, striker, contact bridge, lever and armature is arranged so that in case of short circuit, the anchor the striker due to its small mass accelerates very quickly and thus quickly opens the contact bridge. In this case, the slider hurries the striker before the active lever holds the contact bridge against the contact pressure force permanently in the open position on the slide.

Wenn die Kontaktbrücke aufgeschlagen wurde und dadurch der Kurzschlussstrom unterbrochen ist, endet auch die Krafteinwirkung des Ankers auf den Schlagstift. Die Kontaktbrücke wird jetzt von der Kraft der Kontaktdruckfeder wieder in Schließrichtung gedrückt.If the contact bridge has been opened and thus the short-circuit current is interrupted, the force of the armature on the striker also ends. The contact bridge is now pressed by the force of the contact pressure spring in the closing direction.

Der dem Schlagstift nacheilende Schieber kann diese Gegenbewegung der Kontaktbrücke bremsen, so dass die Kontaktbrücke daran gehindert wird, die Kontakte zu schließen, bevor der Wirkhebel, der aufgrund der größeren mechanischen Trägheit des Schaltschlosses dem Schlagstift noch weiter nacheilt, über den Schieber die Kontaktbrücke schließlich dauerhaft in Offenstellung hält.The follower pin lagging slider can slow this counter-movement of the contact bridge, so that the contact bridge is prevented from closing the contacts before the active lever, which lags the striker pin still further due to the greater mechanical inertia of the switching mechanism, finally the contact bridge permanently over the slide in open position.

Hierbei wird die Trägheit des Schlagstiftes sowie eine geringe Reibung zwischen dem mechanischen Schlagstift und dem Schieber ausgenutzt, so dass der Schlagstift eine ausreichende Zeitdauer die Kontaktbrücke offen hält, bis die Wirkung des Schiebers bei der Auslösung des Schaltschlosses einsetzt.Here, the inertia of the striker pin and a low friction between the mechanical striker and the slider is exploited, so that the striker holds the contact bridge open for a sufficient period of time until the action of the slider starts when the switch lock is released.

Ferner offenbart das Dokument DE 195 40972 A1 ein Schaltgerät gemäß dem Oberbegriff des Anspruchs 1.Further, the document discloses DE 195 40972 A1 a switching device according to the preamble of claim 1.

Es ist die Aufgabe der vorliegenden Erfindung, ein gattungsgemäßes Installationsschaltgerät mit weiter verbessertem dynamischen Verhalten bei der Kurzschlussunterbrechung unter Vermeidung von Kontaktprellen zu schaffen.It is the object of the present invention to provide a generic service switching device with further improved dynamic behavior in the short-circuit interruption while avoiding contact bounce.

Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruches 1.This object is achieved by the features of claim 1.

Die Erfindung ist daher dadurch gekennzeichnet, dass der Abstand der beiden Schenkel zueinander sich zum freien Ende hin verjüngt, wobei der Abstand am freien Ende geringer ist als die Breite der Kontaktbrücke, so dass sich diese bei einer Ausschaltung zwischen den Schenkeln verklemmen kann. Es entsteht dadurch an dem freien Ende der Schenkel ein Klemmbereich, und im Bereich zwischen dem freien Ende der Schenkel und dem Ansatzpunkt der Schenkel an dem Drücker entsteht ein Führungsbereich, in dem die Kontaktbrücke beweglich geführt ist.The invention is therefore characterized in that the distance between the two legs to each other tapers towards the free end, wherein the distance at the free end is less than the width of the contact bridge, so that they can jam in an elimination between the legs. This results in a clamping region at the free end of the legs, and in the region between the free end of the legs and the point of attachment of the legs to the pusher, a guide region is created, in which the contact bridge is movably guided.

Gemäß einer vorteilhaften Ausführungsform sind die Schenkel federnd elastisch ausgebildet. Dabei können sie gemäß einer weiters vorteilhaften Ausführungsform zum freien Ende hin aufeinander zu gebogen sein. Sie könnten auch im Bereich ihrer freien Enden V-förmig aufeinander zu abgewinkelt sein.According to an advantageous embodiment, the legs are resiliently formed. In this case, according to a further advantageous embodiment, they can be bent towards one another toward the free end. You could also be in the region of their free ends V-shaped angled towards each other.

Die vorteilhafte Wirkung der erfindungsgemäßen Gestaltung eines gattungsgemäßen Installationsschaltgerätes liegt darin, dass beim Aufschlagen der Kontaktbrücke diese zwischen den Schenkeln des Drückers verklemmt wird und dadurch ein zu frühes Zurückprellen der Kontaktbrücke in Richtung auf die Schließstellung verhindert wird. Wenn die Kontaktbrücke festgeklemmt ist, kann sie sich nur zusammen mit dem Drücker weiter bewegen.The advantageous effect of the design according to the invention of a generic service switching device is that when the contact bridge hits the latter, it is jammed between the legs of the pusher and, as a result, the contact bridge bounces too early in the direction of the closed position is prevented. If the contact bridge is clamped, it can only move along with the pusher.

In einer vorteilhaften Weiterbildung der Erfindung sind Mittel vorgesehen, die aufgrund einer Bewegung des Drückers die Kontaktbrücke auch wieder frei von den Schenkeln verbringen können. Dies ist hilfreich, wenn nach einem Aufschlagen der Kontaktbrücke, etwa wenn der Kurzschluss abgeklungen ist, das Installationsschaltgerät durch einen Wiedereinschaltvorgang wieder eingeschaltet werden soll.In an advantageous development of the invention means are provided, which can spend the contact bridge again free of the legs due to a movement of the pusher. This is helpful if, after opening the contact bridge, for example when the short circuit has subsided, the service switching device is to be switched on again by a reclosing operation.

Bei einer vorteilhaften Ausführungsform der Erfindung handelt es sich bei den oben genannten Mitteln um einen Steg oder einen Zapfen, gegen den die Kontaktbrücke sich in Ausschaltstellung anlegt, so dass bei weiterer Bewegung des Drückers der Steg oder der Zapfen in Richtung der Ausschaltung die Kontaktbrücke wieder frei von den Schenkeln verbringt.In an advantageous embodiment of the invention, the above-mentioned means are a web or a pin, against which the contact bridge in Ausschaltstellung applies, so that upon further movement of the pusher of the web or the pin in the direction of elimination, the contact bridge free again from the thighs spends.

Diese weitere Bewegung des Drückers kann beim Rücksetzen etwa dadurch stattfinden, dass der Drücker durch den Wirkhebel noch ein Stück weiter in Richtung der Ausschaltstellung gedrückt wird. Durch das Anliegen auf dem Steg oder Zapfen kann die Kontaktbrücke dieser weiteren Bewegung des Drückers nicht mehr folgen, und sie wird dadurch entgegen der Klemmreibungskraft relativ zu der Längserstreckungsrichtung der Schenkel wieder in den Führungsbereich des Schlitzes verbracht, wo sie durch die Kontaktdruckfeder dann wieder in ihre Schließposition gedrückt werden kann.This further movement of the pusher can take place when resetting, for example, that the pusher is pressed by the active lever a little further in the direction of the open position. By abutment on the web or pin, the contact bridge can no longer follow this further movement of the pusher, and it is thereby spent against the clamping frictional force relative to the direction of longitudinal extension of the legs back into the guide portion of the slot, where they return to their Closing position can be pressed.

In einer weiteren vorteilhaften Ausführungsform kann als Mittel auch eine Feder vorgesehen sein, die bei weiterer Bewegung des Drückers die Kontaktbrücke in Ausschaltstellung aus dem Klemmbereich zwischen den Schenkeln bewegt, so dass die Kontaktbrücke in den Führungsbereich frei von den Schenkeln verbracht wird. Das Entklemmen der Kontaktbrücke durch die Feder geschieht dann, wenn die Rückstellkraft der zusammengedrückten Feder größer wird als die Klemmkraft, die die Schenkel auf die Kontaktbrücke ausüben.In a further advantageous embodiment may be provided as a means and a spring which moves the contact bridge in the off position from the clamping area between the legs with further movement of the pusher, so that the contact bridge is spent in the guide area free of the legs. Unclamping of the contact bridge by the spring happens when the restoring force of the compressed spring is greater than the clamping force exerted by the legs on the contact bridge.

Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind den Unteransprüchen zu entnehmen.Further advantageous embodiments and improvements of the invention can be found in the dependent claims.

Anhand der Zeichnung, in denen zwei Ausführungsbeispiele der Erfindung dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen und weitere Vorteile der Erfindung näher erläutert und beschrieben werden.Reference to the drawing, in which two embodiments of the invention are shown, the invention and further advantageous refinements and improvements and further advantages of the invention will be explained and described in detail.

Es zeigen:

Fig. 1a
ein Funktionsschema eines Installationsschaltgerätes mit einem Drücker in der Ruhestellung,
Fig. 1b
eine Längsschnittansicht des Drückers gemäß Fig. 1a in der Ruhestellung,
Fig. 2a
das Funktionsschema des Installationsschaltgerätes mit dem Drücker, gemäß Fig. 1a, kurz nach Auftreten eines Kurzschlussstromes,
Fig. 2b
eine Schnittansicht des Drückers gemäß Fig. 2a, ähnlich der der Fig. 1b,
Fig. 3a
das Funktionsschema des Installationsschaltgerätes mit dem Drücker gemäß Fig. 1a, 2a bei maximaler Auslenkung der Kontaktbrücke in Öffnungsrichtung,
Fig. 3b
eine Schnittansicht des Drückers ähnlich der der Figuren 1b und 2b gemäß Fig. 3a und
Fig. 4
eine Schnittansicht des Drückers einer weiteren Ausgestaltung eines Installationsgerätes.
Show it:
Fig. 1a
a functional diagram of an installation switching device with a pusher in the rest position,
Fig. 1b
a longitudinal sectional view of the pusher according to Fig. 1a at rest,
Fig. 2a
the functional diagram of the service switching device with the handle, according to Fig. 1a , shortly after the occurrence of a short-circuit current,
Fig. 2b
a sectional view of the pusher according to Fig. 2a , similar to the Fig. 1b .
Fig. 3a
the functional diagram of the service switching device with the handle according to Fig. 1a . 2a at maximum deflection of the contact bridge in the opening direction,
Fig. 3b
a sectional view of the pusher similar to that of Figures 1b and 2 B according to Fig. 3a and
Fig. 4
a sectional view of the pusher of another embodiment of an installation device.

In den Figuren 1 bis 4 sind jeweils gleiche oder gleichwirkende Elemente oder Baugruppen jeweils mit den gleichen Bezugsziffern bezeichnet.In the FIGS. 1 to 4 each identical or equivalent elements or assemblies are each denoted by the same reference numerals.

Die Fig. 1 zeigt ein erfindungsgemäßes Installationsschaltgerät 1 mit einem Polstrompfad 2 zwischen einer Eingangsklemme 3 und einer Ausgangsklemme 4. Es könnte sich beispielsweise um einen Polstrompfad eines dreipoligen Motorschutzschalters handeln, dessen andere beiden Polstrompfade entsprechend aufgebaut sind, hier aber nicht dargestellt sind.The Fig. 1 shows an inventive switching device 1 with a Polstrompfad 2 between an input terminal 3 and an output terminal 4. It could for example be a Polstrompfad a three-pole motor protection switch, the other two Polstrompfade are constructed appropriately, but not shown here.

Der Polstrompfad 2 umfasst zwei feststehende Kontaktstücke 5, 6 und zwei auf einer beweglichen Kontaktbrücke 7 angeordnete bewegliche Kontaktstücke 8, 9, durch die eine Kontaktstelle 10 mit Doppelunterbrechung gebildet ist. Die Kontaktbrücke 7 wird durch eine Kontaktdruckfeder 11 in Schließrichtung, siehe Richtungspfeil S, beaufschlagt. Durch einen Drücker 12, der an der der Kontaktdruckfeder 11 gegenüberliegenden Seite der Kontaktbrücke 7 angreift, kann diese in Öffnungsrichtung, siehe Richtungspfeil O, beaufschlagt werden.The Polstrompfad 2 comprises two fixed contact pieces 5, 6 and two arranged on a movable contact bridge 7 movable contact pieces 8, 9, through which a contact point 10 is formed with double interruption. The contact bridge 7 is acted upon by a contact pressure spring 11 in the closing direction, see directional arrow S. By a pusher 12 which engages the contact pressure spring 11 opposite side of the contact bridge 7, this can be applied in the opening direction, see direction arrow O.

Der Polstrompfad 2 umfasst noch einen nur der Vollständigkeit halber mit dargestellten thermischen Auslöser 113 und einen elektromagnetischen Auslöser 13 mit einem beweglichen Anker, der im Falle eines in dem Polstrompfad 2 auftretenden Kurzschlussstromes Aufgrund elektrodynamischer Kräfte über den Drücker 12 die Kontaktbrücke 7 in Öffnungsrichtung aufschlägt, angedeutet durch die Wirklinie 14. Gleichzeitig wirkt der Anker des elektromagnetischen Auslösers 13 im Kurzschlussfall auch auf ein Schaltschloss 15 und entklinkt dessen Verklinkungsstelle, angedeutet durch die Wirklinie 16, so dass das Schaltschloss 15 im entklinkten Zustand über einen Wirkhebel 17, angedeutet durch die Wirklinie 18, den Drücker 12 dauerhaft in Öffnungsrichtung der Kontaktbrücke 7 beaufschlagt. Bei hohen Kurzschlussströmen kann auch eine elektrodynamische Öffnung der Doppelkontaktstelle 10 aufgrund des Stromflusses im Polstrompfad auftreten.The Polstrompfad 2 still includes only for the sake of completeness with illustrated thermal release 113 and an electromagnetic release 13 with a movable armature, which in the case of a occurring in the Polstrompfad 2 short-circuit current due to electrodynamic forces on the pusher 12, the contact bridge 7 opens in the opening direction, indicated by the action line 14. At the same time, the armature of the electromagnetic release 13 acts in the event of a short circuit on a switching mechanism 15 and unlocks its Verklinkungsstelle, indicated by the action line 16, so that the switching mechanism 15 in the unlatched state via an active lever 17, indicated by the action line 18, the pusher 12 permanently applied in the opening direction of the contact bridge 7. At high short-circuit currents and an electrodynamic opening of the double pad 10 may occur due to the current flow in the Polstrompfad.

Die Funktion des thermischen Auslösers 113, der im Falle eines Überstromes ebenfalls auf das Schaltschloss 15 wirkt, angedeutet durch die Wirklinie 114, ist im Prinzip bekannt und nicht Gegenstand der vorliegenden Erfindung.The function of the thermal release 113, which also acts in the case of an overcurrent on the switching mechanism 15, indicated by the action line 114, is known in principle and not the subject of the present invention.

Bei dem mechanischen System umfassend das Schaltschloss 15 und den Wirkhebel 17 kann es sich beispielsweise um ein Kniehebelsystem mit einer zweistufigen Verklinkung handeln. Der Wirkhebel 17 ist als Doppelarmhebel ausgebildet, dessen erster, von dem Schaltschloss 15 beaufschlagter Hebelarm 171 und dessen zweiter, mit dem Drücker 12 zusammenwirkender Hebelarm 172 einen stumpfen Winkel miteinander bilden und in einer ortsfesten Drehachse 173 drehbar gelagert ist, wodurch der Wirkhebel 17 als Umlenkhebel wirkt. Allerdings könnte der Wirkhebel auch eine andere Form besitzen.In the mechanical system comprising the switching mechanism 15 and the active lever 17 may be, for example, a toggle lever system with a two-stage latch. The active lever 17 is designed as a double arm, the first acted upon by the switching mechanism 15 lever arm 171 and the second, cooperating with the pusher 12 lever arm 172 form an obtuse angle with each other and is rotatably mounted in a stationary axis of rotation 173, whereby the active lever 17 acts as a lever. However, the active lever could also have a different shape.

Dieses gerade beschriebene mechanische System hat eine gewisse mechanische Trägheit, wodurch nach dem Entklinken eine gewisse Zeit, beispielsweise 3 ms, vergeht, bevor der Wirkhebel 17 auf den Drücker 12 trifft, um diesen dauerhaft in Öffnungsrichtung zu beaufschlagen.This mechanical system just described has a certain mechanical inertia, which after unlatching a certain time, for example, 3 ms, passes before the active lever 17 hits the pusher 12 to apply this permanently in the opening direction.

Demgegenüber ist die Zeit bis zum direkten Aufschlagen der Kontaktbrücke 7 durch den hier als Schlaganker wirkenden Anker des elektromagnetischen Auslösers 13 viel kürzer; sie beträgt beispielsweise nur 1 ms.In contrast, the time to the direct opening of the contact bridge 7 by the here acting as a hammer armature armature of the electromagnetic release 13 is much shorter; for example, it is only 1 ms.

Dadurch könnte es, wenn keine weiteren Maßnahmen ergriffen werden, passieren, dass die Kontaktbrücke 7 durch die Rückstellkraft der Kontaktdruckfeder 11 bereits wieder in ihre Ausgangsstellung in der Schließposition zurück gedrückt und die Kontaktstelle 10 dadurch wieder geschlossen wird, bevor noch der Wirkhebel 17 mit dem freien Ende seines zweiten Armes 171 den Drücker und damit die Kontaktbrücke 7 dauerhaft in Öffnungsstellung beaufschlagen können.This could, if no further measures are taken, happen that the contact bridge 7 already pressed back by the restoring force of the contact pressure spring 11 back to its original position in the closed position and the contact point 10 is closed again before the effective lever 17 with the free End of his second arm 171, the pusher and thus the contact bridge 7 can act permanently in the open position.

Der Drücker 12 ist entsprechend der Ausgestaltung nach der DE 10 2006 055 007.2 zweiteilig ausgeführt und umfasst einen Schieber 19 und einen Schlagstift 20. Wie in der Schnittdarstellung der Fig. 1b zu sehen, ist der Drücker 12 ein längs erstrecktes Bauteil mit einer in etwa zylindrischen Grundform.The pusher 12 is according to the embodiment of the DE 10 2006 055 007.2 designed in two parts and includes a slider 19 and a striker 20. As in the sectional view of Fig. 1b can be seen, the pusher 12 is an elongated member having an approximately cylindrical basic shape.

In einer ersten, schlitzartigen Öffnung 21 im Schieber 19, die nach unten zur Schmalseite des Schiebers 19 hin offen ist, ist die Kontaktbrücke 7 in ihrer Schließbeziehungsweise in ihrer Öffnungsrichtung verschieblich geführt.In a first, slot-like opening 21 in the slide 19, which is open down to the narrow side of the slide 19, the contact bridge 7 is slidably guided in its Schließbeziehungsweise in its opening direction.

Der Schlagstift 20 ist in einer zweiten, kanalartigen Öffnung 22 in dem Schieber 19 ebenfalls in der Schließ- beziehungsweise Öffnungsrichtung der Kontaktbrücke 7 beweglich geführt. Er überragt den Schieber 19 nach oben in Richtung des Angriffspunktes des Schlagankers.The striking pin 20 is also in the closing or opening direction of the contact bridge 7 in a second, channel-like opening 22 in the slide 19 movably guided. It projects beyond the slide 19 in the direction of the point of the impact anchor.

In der ersten Öffnung 21 des Schiebers 19 ist ein erster Absatz 23 gebildet, der als oberer Anschlag für die Kontaktbrücke 7 dient. An dem der Kontaktbrücke 7 entgegengesetzten Ende ist am Schieber 19 ein zweiter Absatz 24 gebildet, der als Angriffspunkt für den Wirkhebel 17 dient.In the first opening 21 of the slider 19, a first shoulder 23 is formed, which serves as an upper stop for the contact bridge 7. At the opposite end of the contact bridge 7, a second shoulder 24 is formed on the slide 19, which serves as a point of attack for the active lever 17.

Die erste Öffnung 21 wird durch zwei gabelartige Vorsprünge oder Schenkel 30, 31 gebildet, die in Längsrichtung des Schiebers 19 vorspringen und die Kontaktbrücke 7 zwischen sich nehmen. Die freien Enden 32, 33 der Zinken 30, 31 nehmen zwischen sich einen geringeren Abstand A zueinander ein als der Abstand Aw an dem Absatz 23. Der Abstand A ist auch geringer als die Breite B der Kontaktbrücke 7. In der Zeichnung ist die Form der Schenkel 30, 31 leicht gekrümmt dargestellt; es besteht natürlich auch die Möglichkeit, die Schenkel 30, 31 etwa in ihrer Mitte aufeinander zu abzuwinkeln, so dass sie im Bereich der freien Enden eine V-Form bilden.The first opening 21 is formed by two fork-like projections or legs 30, 31 projecting in the longitudinal direction of the slider 19 and take the contact bridge 7 between them. The free ends 32, 33 of the tines 30, 31 take between them a smaller distance A to each other than the distance A w at the shoulder 23. The distance A is also less than the width B of the contact bridge 7. In the drawing, the shape the legs 30, 31 shown slightly curved; Of course, it is also possible, the legs 30, 31 approximately at an angle in their midst, so that they form a V-shape in the region of the free ends.

Somit entsteht an den freien Enden 33,32 der Schenkel 30, 31 ein Klemmbereich zum Festklemmen der Kontaktbrücke 7, und zwischen den freien Enden 33, 32 und dem ersten Absatz 23, an dem die Schenkel 30, 31 an dem Drückerkörper ansetzen, entsteht ein Führungsbereich für die Kontaktbrücke, in dem diese beweglich führbar ist.Thus arises at the free ends 33,32 of the legs 30, 31 a clamping area for clamping the contact bridge 7, and between the free ends 33, 32 and the first paragraph 23, where the legs 30, 31 attach to the pusher body, is formed Guide area for the contact bridge, in which it is moveable.

Die Funktion der erfindungsgemäßen Anordnung bei Auftreten eines Kurzschlussstroms wird nun im folgenden erläutert. Wenn ein Kurzschlussstrom auftritt, siehe Fig. 2a, so schlägt der Anker des Auslösers 13 auf dem Schlagstift 20 des Drückers 12, angedeutet durch den Impulspfeil I in der Fig. 2a. Der Schlagstift 20 wird in Öffnungsrichtung O nach unten beschleunigt, wobei er die Kontaktbrücke 7 in Öffnungsrichtung O mitnimmt und vom Anschlag 23 entfernt. Dadurch werden die beweglichen Kontaktstücke 8, 9 von den festen Kontaktstücken 5, 6 getrennt und die Doppelkontaktstelle 10 geöffnet. Durch diese Abwärtsbewegung des Schlagstiftes 20 gelangt die Kontaktbrücke 7 in den verengten Bereich und wird, da der Abstand A zwischen den Vorsprüngen beziehungsweise den Zinken 30, 31 verringert ist, zwischen den Zinken 30, 31 durch Verklemmen festgehalten. Beim Einfahren in den verengten Bereich nimmt die Kontaktbrücke 7 den Schieber 19 eine gewisse Wegstrecke mit, wobei der Schieber 19, selbst wenn er aufgrund der Rückbewegung der Kontaktbrücke 7 von dieser aufgrund der Reibung (Verklemmung) mitgenommen wird, dann vom Wirkhebel 17 festgehalten wird. In jedem Fall bleibt die Doppelkontaktstellte 10 geöffnet. Wesentlich ist, dass der Abstand der Verengung der Zinken beziehungsweise der Öffnung 21 vom Absatz 23 ausreichend groß ist.The function of the arrangement according to the invention when a short-circuit current occurs will now be explained below. If a short circuit current occurs, see Fig. 2a Thus, the armature of the trigger 13 strikes on the striker 20 of the pusher 12, indicated by the pulse arrow I in the Fig. 2a , The striking pin 20 is accelerated in the opening direction O down, taking the contact bridge 7 in the opening direction O and removed from the stop 23. As a result, the movable contact pieces 8, 9 are separated from the fixed contact pieces 5, 6 and the double contact point 10 is opened. By this downward movement of the striker pin 20, the contact bridge 7 enters the narrowed region and, since the distance A between the projections or the prongs 30, 31 is reduced, held between the prongs 30, 31 by jamming. When entering the narrowed area takes the contact bridge 7 the slider 19 with a certain distance, wherein the slide 19, even if it is taken due to the return movement of the contact bridge 7 of this due to the friction (deadlock), then held by the active lever 17. In any case, the Doppelkontaktstellte 10 remains open. It is essential that the distance of the narrowing of the tines or the opening 21 from the shoulder 23 is sufficiently large.

Ortsfest am Gehäuse 40, von dem nur ein Teil dargestellt ist, ist ein Zapfen 41 angeformt, der in den Schlitz 21 teilweise eingreift. Die Kontaktbrücke 7 gelangt in unmittelbare Nähe des Endes des Zapfens 41 und die Kontaktbrücke 7 kann durch weiteres Niederdrücken des Schiebers 19 (zum Beispiel durch einen Resetknopf) frei von dem Vorspringen kommen, so dass die Kontaktbrücke 7 von der Kontaktfeder wieder in die Einschaltstellung verbracht wird.Stationary on the housing 40, of which only a part is shown, a pin 41 is integrally formed, which engages in the slot 21 partially. The contact bridge 7 passes in the immediate vicinity of the end of the pin 41 and the contact bridge 7 can come by further depression of the slider 19 (for example, by a reset button) free of the projections, so that the contact bridge 7 is moved from the contact spring back into the closed position ,

Anstatt eines Zapfens 41 kann auch eine Druckfeder 45, siehe Fig. 4, vorgesehen sein, die entsprechend zu bemessen ist, so dass sie die Reibkraft überwinden kann, wenn eine Einschaltung vorgenommen wird.Instead of a pin 41 may also be a compression spring 45, see Fig. 4 be provided, which is to be sized accordingly, so that they can overcome the frictional force when an engagement is made.

Eine weitere vorteilhafte Wirkung der erfindungsgemäßen Ausgestaltung tritt auch dann zu Tage, wenn die Aufschlagbewegung der Kontaktbrücke nicht ausreichen sollte, um sie soweit in den Klemmbereich hinein zu schlagen, dass sie dort fest geklemmt wird. Denn aufgrund der gekrümmten Innenkontur des Schlitzes, die durch die gekrümmte Form der Schenkel entsteht, entsteht auch bereits in einem Bereich, der noch knapp oberhalb des Klemmbereiches liegt, eine gewisse Reibung zwischen der Kontaktbrücke 7 und den Innenseiten der Schenkel 30,31. Es ist dies ein Übergangsbereich zwischen dem Führungsbereich und dem Klemmbereich. Aufgrund der Reibung zwischen der Kontaktbrücke 7 und den Schenkeln 30, 31 in dem Zwischenbereich wird dort bereits die Bewegung der Kontaktbrücke 7 relativ zu den Schenkeln 30,31 verlangsamt. Somit resultiert eine Verzögerung der Bewegung der Kontaktbrücke auch dann schon, wenn diese nicht vollständig in den Klemmbereich gedrückt werden sollte. Auch die so erzielte Verzögerung kann schon ausreichend sein, um ein Kontaktprellen wirksam zu vermeiden.A further advantageous effect of the embodiment according to the invention also appears when the impact movement of the contact bridge should not be sufficient to beat it far enough into the clamping area that it is firmly clamped there. Because due to the curved inner contour of the slot, which is formed by the curved shape of the legs, arises even in a region which is still just above the clamping area, a certain friction between the contact bridge 7 and the inner sides of the legs 30,31. This is a transitional area between the guide area and the clamping area. Due to the friction between the contact bridge 7 and the legs 30, 31 in the intermediate region, the movement of the contact bridge 7 there is already slowed relative to the legs 30,31. This results in a delay in the movement of the contact bridge even if it should not be completely pressed into the clamping area. The delay thus achieved can already be sufficient to effectively avoid contact bounce.

Es soll noch erwähnt werden, dass die oben beschriebene erfindungsgemäße Wirkung auch dann eintritt, wenn die Öffnung der Kontaktbrücke zunächst nicht durch den Schlagstift, sondern aufgrund einer elektrodynamische Abstoßung zwischen den festen und beweglichen Kontaktstücken erfolgt. Insbesondere bei hohen Stromstärken eines Kurzschlussstromes ist die elektrodynamische Abstoßung schneller als die Reaktionszeit des elektromagnetischen Auslösers 13. Der Anker des elektromagnetischen Auslösers 13 läuft daher der elektrodynamischen Abstoßung der Kontaktstelle 10 nach. Doch auch wenn die Kontaktbrücke 7 aufgrund einer elektrodynamischen Abstoßung nach unten in den Klemmbereich des Schlitzes 21 gedrückt wird, tritt die festklemmende Wirkung im Klemmbereich ein, und damit die vorteilhafte Wirkung der Verzögerung des Zurückprellens der Kontaktbrücke.It should also be mentioned that the effect according to the invention described above also occurs when the opening of the contact bridge is initially not performed by the striker, but due to an electrodynamic repulsion between the fixed and movable contact pieces. Particularly at high current levels of a short-circuit current, the electrodynamic repulsion is faster than the reaction time of the electromagnetic release 13. The armature of the electromagnetic release 13 therefore follows the electrodynamic repulsion of the contact point 10. But even if the contact bridge 7 is pressed down due to an electrodynamic repulsion in the clamping region of the slot 21, the clamping effect enters the clamping area, and thus the beneficial effect of delaying the rebound of the contact bridge.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
InstallationsschaltgerätService switching device
22
Polstrompfadpole current path
33
Eingangsklemmeinput terminal
44
Ausgangsklemmeoutput terminal
5, 65, 6
Feststehende KontaktstückeFixed contact pieces
77
Bewegliche KontaktbrückeMobile contact bridge
8, 98, 9
Bewegliche KontaktstückeMovable contact pieces
1010
Kontaktstellecontact point
1111
KontaktdruckfederContact pressure spring
1212
Drückerhandle
1313
Elektromagnetischer AuslöserElectromagnetic release
1414
Wirklinieline of action
1515
Schaltschlossswitch lock
1616
Wirklinieline of action
1717
Wirkhebelactive lever
1818
Wirklinieline of action
1919
Schieberpusher
2020
Schlagstiftstriker
2121
Erste Öffnung, SchlitzFirst opening, slot
2222
Zweiter ÖffnungSecond opening
2323
Erster AbsatzFirst paragraph
2424
Zweiter AbsatzSecond paragraph
2525
Stegweb
2626
Absatzparagraph
2727
Abgeschrägte SeitenflächenBeveled side surfaces
30,3130.31
gabelartiger Vorsprung, Schenkelfork-like projection, thighs
32, 3332, 33
freies Ende der Schenkelfree end of the thighs
4141
Zapfen, StegCones, bridge
4040
Gehäusecasing
4545
Druckfedercompression spring
113113
Thermischer AuslöserThermal release
114114
Wirklinieline of action
171171
Erster HebelarmFirst lever arm
172172
Zweiter HebelarmSecond lever arm
173173
Drehachseaxis of rotation
SS
Richtungspfeilarrow
OO
Richtungspfeilarrow
II
Impulspfeilpulse arrow
AA
Abstand zwischen den freien EndenDistance between the free ends
Aw A w
Abstand zwischen den Schenkeln Absatz 23Distance between the thighs paragraph 23
BB
Breite der KontaktbrückeWidth of the contact bridge

Claims (7)

  1. Electrical switching device (1) with a double contact point (10), a contact link (7) which is brought by a striker pin (20), counter to the pressure of a contact pressure spring (11), during a switch-off operation into the open position, for at least one pole current path (2), with a thruster (12), which can be actuated by a switching mechanism (15) and in which the striker pin (20) is guided, the contact link (7) being accommodated in a slot (21) in the thruster (12), which slot is formed by two limbs (30, 31) projecting in the same direction, characterized in that the distance between the two limbs (30, 31) tapers towards the free end (32, 33), the distance at the free end (32, 33) being smaller than the width of the contact link (7), with the result that said contact link can be clamped between the limbs (30, 31) in the event of a switch-off operation.
  2. Electrical switching device (1) according to Claim 1, characterized in that the limbs (30, 31) are designed to be spring-elastic.
  3. Electrical switching device (1) according to Claim 2, characterized in that the limbs (30, 31) are bent towards one another towards the free end (33, 32).
  4. Electrical switching device (1) according to Claim 3, characterized in that the limbs (30, 31) are bent back towards one another in the form of a V in the region of their free ends (32, 33).
  5. Electrical switching device (1) according to one of the preceding claims, characterized by means which, owing to a movement of the thruster (12), bring the contact link (7) free from the limbs (30, 31).
  6. Electrical switching device (1) according to Claim 5, characterized in that the means are a web (41) or a journal, against which the contact link (7) rests in the switch-off position, with the result that, during a further movement of the thruster (12), the web (41) or the journal brings the contact link (7) free from the limbs (30, 31) in the switch-off direction.
  7. Electrical switching device (1) according to Claim 6, characterized in that the means provided is a spring (45), which, during a further movement of the thruster (12), moves the contact link (7) in the switch-off position from the region between the limbs (30, 31), with the result that the contact link (7) is brought free from the limbs (30, 31).
EP09001939A 2008-03-28 2009-02-12 Installation switching device with a double interruption Active EP2105941B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008016036A DE102008016036A1 (en) 2008-03-28 2008-03-28 Installation switching device with a double break

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EP2105941A2 EP2105941A2 (en) 2009-09-30
EP2105941A3 EP2105941A3 (en) 2011-10-19
EP2105941B1 true EP2105941B1 (en) 2012-04-18

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US (1) US8035044B2 (en)
EP (1) EP2105941B1 (en)
CN (1) CN101546657B (en)
AT (1) ATE554494T1 (en)
DE (1) DE102008016036A1 (en)

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Also Published As

Publication number Publication date
EP2105941A2 (en) 2009-09-30
EP2105941A3 (en) 2011-10-19
DE102008016036A1 (en) 2009-10-01
US20090242373A1 (en) 2009-10-01
CN101546657B (en) 2014-02-05
ATE554494T1 (en) 2012-05-15
CN101546657A (en) 2009-09-30
US8035044B2 (en) 2011-10-11

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