EP1760748B1 - Electrical switching device - Google Patents

Electrical switching device Download PDF

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Publication number
EP1760748B1
EP1760748B1 EP06015649.4A EP06015649A EP1760748B1 EP 1760748 B1 EP1760748 B1 EP 1760748B1 EP 06015649 A EP06015649 A EP 06015649A EP 1760748 B1 EP1760748 B1 EP 1760748B1
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EP
European Patent Office
Prior art keywords
release
lever
switching device
latching
electromagnetic
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.)
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Application number
EP06015649.4A
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German (de)
French (fr)
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EP1760748A3 (en
EP1760748A2 (en
Inventor
Jürgen Christmann
Ralf Dipl.-Ing. Weber
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.)
ABB AG Germany
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ABB AG Germany
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Publication of EP1760748A2 publication Critical patent/EP1760748A2/en
Publication of EP1760748A3 publication Critical patent/EP1760748A3/en
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Publication of EP1760748B1 publication Critical patent/EP1760748B1/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • H01H71/16Electrothermal mechanisms with bimetal element
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/24Electromagnetic mechanisms
    • H01H71/2463Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to an electrical switching device having a front front wall, with a thermal release, with an electromagnetic release, with a switching mechanism with a Verklinkungsstelle and at least one contact point, which is permanently opened or closed by means of the switching mechanism, with a switching handle, by means of a coupling element is connected to one end of a tab whose other end is coupled to a contact carrier carrying the movable contact piece, and with a latch lever which forms the Verklinkungsstelle with a release lever, wherein the contact carrier for the movable contact piece between the thermal and the electromagnetic release is , according to the preamble of claim 1.
  • the invention relates to a circuit breaker used to shut down loads in the event of a short circuit or overcurrent.
  • the invention can of course also be applied to motor protection switches and residual current circuit breakers.
  • a circuit breaker has in its interior an electromagnetic actuator having a plunger armature electromagnet with a core and a movable armature around which a coil is wound.
  • the armature moves and on the one hand strikes the contact lever, so that the contact point is opened quickly; On the other hand, it also causes a permanent opening of the contact point via a switching mechanism.
  • the thermal release which is usually designed as a bimetallic release, acts on the switching mechanism exclusively for permanent opening of the contact point.
  • the bimetal is usually designed as a strip, which bends due to the different expansion coefficients of the interconnected metals.
  • a strip made of a shape memory alloy can also be used.
  • the switch lock between two boards is mounted, which are interconnected and also the bearings for the corresponding, the Verklinkungsstelle forming components have or contain.
  • this switch is the electromagnetic release between the bimetallic strip and the contact lever, ie the contact lever is located on one side and the bimetallic strip on the other.
  • the FR 2 613 871 shows an electrical switching device with a thermal release, with a switching mechanism with a Verklinkungsstelle and at least one contact point, which is permanently opened or closed by means of the derailleur, with a switching handle, which is connected by means of a coupling element with one end of a ratchet lever, with a part the contact lever forms the Verklinkungsstelle, wherein the contact carrier for the movable contact piece between the thermal and the electromagnetic release is, wherein a detent on the latch lever with a projection on the contact lever forms the Verklinkungsstelle, and wherein a rotatably mounted hammer is provided, on the one hand from the thermal release and the other part of the electromagnetic release is pivoted and pivoted when triggered the latch lever in the direction of unlatching the Verklinkungsstelle.
  • the object of the invention is to further improve a switch of the type mentioned, in particular to simplify the assembly considerably.
  • the invention is therefore characterized in that a detent on the latch lever with a return on the rotatably mounted, cooperating with the electromagnetic release and the thermal release trigger lever forms the Verklinkungsstelle, and that a rotatably mounted hammer is provided, on the one hand by the thermal release and on the other hand, the electromagnetic release is pivotable and pivoted when triggered the release lever in the direction of unlatching the Verklinkungsstelle.
  • the axis of rotation between Verklinkungsstelle and electrical release is arranged, wherein the first arm cooperates with the latch lever and the second arm with the thermal and magnetic trigger.
  • the second arm may cover the armature of the electromagnetic release.
  • the axis of rotation of the hammer is fixed on a line which is formed by the bearing points of the trigger or impact lever and the control handle, this line is approximately perpendicular to the mounting plane or to the front wall.
  • the vote between unlatching before striking the contact lever is significantly improved, since the tolerance chain has been shortened compared to that of the previous switch lock in the switch S2 of the company ABB Stotz contact GmbH, Heidelberg, considerably.
  • the vote is in one part in the release lever. The striker hits on the release lever which moves until the unlatching and only then occurs on the movable contact carrier to the opening.
  • FIG. 4 the views accordingly Figures 1 and 2 and the FIG. 3 a corresponding view from the back of the views in the Figures 1 and 2 are shown.
  • a circuit breaker 10 which is partially visible in the area of its switching mechanism, has a housing 11, which is composed of a cup-shaped housing lower part and a cup-shaped housing upper part.
  • a housing 11 which is composed of a cup-shaped housing lower part and a cup-shaped housing upper part.
  • the lower part of the housing can be seen; in the FIGS. 3 and 4 only the rear derailleur is shown as such with a part of the contact lever, wherein the housing 11 is omitted.
  • the shows Fig. 3 the rear view of the rear derailleur for better clarity.
  • the housing is of a pedestal type and has a front front wall 12, two rear front walls 13 and 14, not fully shown in the drawing, two front side walls 15 and 16 connecting the front front wall 12 to the rear front walls; parallel to the front front wall or the rear front walls 13, 14 is a downwards the housing final mounting wall, in the FIGS. 1 to 4 is not shown and which is not important for the invention.
  • the front front wall 12 has an approximately semicircular bulge or protrusion 17, in the region of a bearing 18, a switch knob 19 is mounted.
  • the switch knob 19 is a double-arm, with a handle 20 and a located inside the switching device eye-shaped projection 21; in the eye-shaped extension 21, a passage opening 22 is introduced; the center of the passage opening 22, the center of the bearing 18 and the center line of the control handle 20 are in line or aligned with each other.
  • the switching handle 20 protrudes from an opening 23 in the protrusion 17 out.
  • a leg (not shown) of a bracket 24 is inserted, which has a U-shape, wherein the web 25 of the bracket in the FIGS. 1 to 4 is visible.
  • the switching device further comprises a release lever 100 which is rotatably mounted about the axis 18 of the control handle 19.
  • a recess 101 which forms the Verklinkungsstelle with a locking lug 30 on the pawl lever 29.
  • the locking lug 30 on the pawl lever 29 is formed on the end of the pawl lever 29, opposite to the tab 27 (see Fig.
  • the latching is accordingly hereinafter referred to by the reference numerals 30/101, see below.
  • the other end of the tab 27 is pivotally connected by means of the hinge axis 33 with the contact lever 34, which has approximately centrally a slot 35 with which it is rotatably mounted on a stationary pin 36 in the housing 11.
  • the contact lever 34 becomes a double-arm lever, whose lever axis 37, which is opposite to the hinge axis 33, carries the so-called movable contact piece 38, which cooperates with a fixed contact piece 39.
  • the latch lever 29 is rotatably mounted at its latching point 30, 101 opposite end via a pin assembly 40 in the housing (both in the lower housing part and in the upper housing part).
  • the switching mechanism In the closed position, in which the nose 30 rests against the recess 101, the switching mechanism is in the closed position, ie when the movable contact piece 38 contacts the fixed contact piece 39, in a first stable position, in which the central axis of the web 25 laterally , in the execution according to Fig. 2 left, next to the central axis of the bearing or the pivot bearing 18 of the switch knob 19 passes, so that the central axis of the leg 25 with the line formed by the central axis of the opening 22 and the central axis of the bearing 18 assumes an obtuse angle, in the direction of Verklinkungsstelle 30/101 is open.
  • the tab 27 and the latch lever 29 are approximately parallel to the front front wall. In the closed position, the bracket 24 pushes the tab away from the latching point 30/101, so that the resulting force generates the switch-on force.
  • the slot 35 lays down with its end, which on the side of the contact lever 34, on which the movable contact piece is located at. The slot 35 extends approximately perpendicular to the longitudinal extent of the contact lever 34th
  • a hammer 102 is provided below the axis of rotation 18, ie between the axis of rotation 18 and the electromagnetic release 46, a hammer 102 is provided, the axis of rotation 103 is on a line which is approximately perpendicular to the mounting plane through the axis 18 and parallel to this.
  • the hammer 102 has a first arm 104 which extends into the region of the trigger lever 100 and cooperates with a nose 105, see also Fig. 3 ,
  • the hammer 102 further has a second lever 106, which projects approximately to the mounting plane and covers the striker 48 with its end.
  • the arm 104 projects toward the front wall 12, and the arm 104 and the arm 106 form a Z-shape with each other, and the end portions of the arms 104 and 106 are approximately parallel to each other.
  • an end 49 of a connecting rod 50 is connected, hinged here, which by means of a pin 51, which projects perpendicular to the plane in this and therefore only shown in broken lines, behind a bimetallic strip 52, which is the thermal release, attacks.
  • the thermal release 52 is located between the pin 51 and the portion 106th
  • the longitudinal axis of the connecting rod 50 extends approximately perpendicular to the longitudinal extent of the bimetallic strip; in the execution according to the FIGS. 1 to 4
  • the longitudinal extent of the bimetallic strip 52 with the attachment side forms an acute angle, which is open towards the electromagnetic release.
  • a compression spring 53 is provided which acts on the contact lever clockwise about the bearing 36, so that the Compression spring 53, the switch-off, so that movement of the contact lever 34 from the position according to Fig. 2 in the position according to Fig. 1 , supported.
  • the thermal release 52 bends, then the free end bends approximately in the direction of arrow P and takes over the rod or connecting rod 50 the portion 106 of the hammer with, whereby the return 101 of the nose 30 and thereby removes the Latching is opened.
  • the beginning of the release is back in the Fig. 3 shown; the further procedure is the same as that described above.
  • the switch lock described with reference to a circuit breaker can also be used in a residual current circuit breaker; In this case, instead of the electromagnetic release 46, which responds to short-circuit current, a trigger should be used which responds to a fault current.
  • a contact carrier which carries a contact bridge, which in the ON state two fixed contacts, so a pair of contact pieces, electrically conductively connects.
  • a ramp be 108 against which during the triggering process an extension 109 of the tab 27 comes to a stop, which is made Fig. 4 is clearly visible.
  • the release lever which is optionally coupled to a release lever in an adjacently arranged circuit breaker is further pivoted to its triggered position, so that the trigger lever is safely spent in the adjacent circuit breaker in its release position, so that there also the triggering process proceeds as described above.

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Description

Die Erfindung betrifft ein elektrisches Schaltgerät mit einer vorderen Frontwand, mit einem thermischen Auslöser, mit einem elektromagnetischen Auslöser, mit einem Schaltwerk mit einer Verklinkungsstelle und wenigstens einer Kontaktstelle, die mittels des Schaltwerkes bleibend geöffnet oder geschlossen wird, mit einem Schaltgriff, der mittels eines Kupplungselementes mit einem Ende einer Lasche verbunden ist, deren anderes Ende mit einem das bewegliche Kontaktstück tragenden Kontaktträger gekoppelt ist, und mit einem Klinkenhebel , der mit einem Auslösehebel die Verklinkungsstelle bildet, wobei sich der Kontaktträger für das bewegliche Kontaktstück zwischen dem thermischen und dem elektromagnetischen Auslöser befindet, gemäß dem Oberbegriff des Anspruches 1.The invention relates to an electrical switching device having a front front wall, with a thermal release, with an electromagnetic release, with a switching mechanism with a Verklinkungsstelle and at least one contact point, which is permanently opened or closed by means of the switching mechanism, with a switching handle, by means of a coupling element is connected to one end of a tab whose other end is coupled to a contact carrier carrying the movable contact piece, and with a latch lever which forms the Verklinkungsstelle with a release lever, wherein the contact carrier for the movable contact piece between the thermal and the electromagnetic release is , according to the preamble of claim 1.

Insbesondere betrifft die Erfindung einen Leitungsschutzschalter, der zum Abschalten von Verbrauchern bei einem Kurzschluss- oder Überstrom verwendet wird. Die Erfindung kann natürlich auch angewendet werden bei Motorschutzschaltern und bei Fehlerstromschutzschaltern.In particular, the invention relates to a circuit breaker used to shut down loads in the event of a short circuit or overcurrent. The invention can of course also be applied to motor protection switches and residual current circuit breakers.

Ein Leitungsschutzschalter besitzt in seinem Inneren einen elektromagnetischen Auslöser, der einen Tauchankerelektromagneten aufweist, mit einem Kern und einem beweglichen Anker, um die herum eine Spule gewickelt ist. Im Falle eines Kurzschlusses bewegt sich der Anker und schlägt einerseits den Kontakthebel auf, damit die Kontaktstelle schnell geöffnet wird; andererseits bewirkt er auch über ein Schaltschloss eine bleibende Öffnung der Kontaktstelle. Der thermische Auslöser, der meist als Bimetallauslöser ausgebildet ist, wirkt auf das Schaltschloss ausschließlich zur bleibenden Öffnung der Kontaktstelle. Das Bimetall ist meist als Streifen ausgebildet, der sich aufgrund der unterschiedlichen Ausdehnungskoeffizienten der miteinander verbundenen Metalle ausbiegt. Anstatt eines Thermobimetalls kann natürlich auch ein Streifen aus einer Formgedächtnislegierung verwendet werden.A circuit breaker has in its interior an electromagnetic actuator having a plunger armature electromagnet with a core and a movable armature around which a coil is wound. In the case of a short circuit, the armature moves and on the one hand strikes the contact lever, so that the contact point is opened quickly; On the other hand, it also causes a permanent opening of the contact point via a switching mechanism. The thermal release, which is usually designed as a bimetallic release, acts on the switching mechanism exclusively for permanent opening of the contact point. The bimetal is usually designed as a strip, which bends due to the different expansion coefficients of the interconnected metals. Of course, instead of a bimetallic strip, a strip made of a shape memory alloy can also be used.

Bei dem Schalter S2 der Firma ABB Stotz Kontakt GmbH, Heidelberg, ist das Schaltschloss zwischen zwei Platinen gelagert, die miteinander verbunden sind und die auch die Lagerstellen für die entsprechenden, die Verklinkungsstelle bildenden Komponenten aufweisen bzw. enthalten. Bei diesem Schalter befindet sich der elektromagnetische Auslöser zwischen dem Thermobimetall und dem Kontakthebel, d.h. der Kontakthebel befindet sich auf einer Seite und das Thermobimetall auf der anderen.In the switch S2 ABB Stotz Kontakt GmbH, Heidelberg, the switch lock between two boards is mounted, which are interconnected and also the bearings for the corresponding, the Verklinkungsstelle forming components have or contain. In this switch is the electromagnetic release between the bimetallic strip and the contact lever, ie the contact lever is located on one side and the bimetallic strip on the other.

Die FR 2 613 871 zeigt ein elektrisches Schaltgerät mit einem thermischen Auslöser, mit einem Schaltwerk mit einer Verklinkungsstelle und wenigstens einer Kontaktstelle, die mittels des Schaltwerks bleibend geöffnet oder geschlossen wird, mit einem Schaltgriff, der mittels eines Kupplungselementes mit einem Ende eines Klinkenhebels verbunden ist, der mit einem Teil des Kontakthebels die Verklinkungsstelle bildet, wobei sich der Kontaktträger für das bewegliche Kontaktstück zwischen dem thermischen und dem elektromagnetischen Auslöser befindet, wobei eine Rastnase an dem Klinkenhebel mit einem Vorsprung an dem Kontakthebel die Verklinkungsstelle bildet, und wobei ein drehbar gelagerter Schlaghebel vorgesehen ist, der einerseits vom thermischen Auslöser und andererseits vom elektromagnetischen Auslöser verschwenkbar ist und bei Auslösung den Klinkenhebel in Richtung Entklinken der Verklinkungsstelle verschwenkt.The FR 2 613 871 shows an electrical switching device with a thermal release, with a switching mechanism with a Verklinkungsstelle and at least one contact point, which is permanently opened or closed by means of the derailleur, with a switching handle, which is connected by means of a coupling element with one end of a ratchet lever, with a part the contact lever forms the Verklinkungsstelle, wherein the contact carrier for the movable contact piece between the thermal and the electromagnetic release is, wherein a detent on the latch lever with a projection on the contact lever forms the Verklinkungsstelle, and wherein a rotatably mounted hammer is provided, on the one hand from the thermal release and the other part of the electromagnetic release is pivoted and pivoted when triggered the latch lever in the direction of unlatching the Verklinkungsstelle.

Aufgabe der Erfindung ist es, einen Schalter der eingangs genannten Art noch weiter zu verbessern, insbesondere die Montage erheblich zu vereinfachen.The object of the invention is to further improve a switch of the type mentioned, in particular to simplify the assembly considerably.

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 eine Rastnase an dem Klinkenhebel mit einem Rücksprung an dem drehbar gelagerten, mit dem elektromagnetischen Auslöser und dem thermischen Auslöser zusammenwirkenden Auslösehebel die Verklinkungsstelle bildet, und dass ein drehbar gelagerter Schlaghebel vorgesehen ist, der einerseits vom thermischen Auslöser und andererseits vom elektromagnetischen Auslöser verschwenkbar ist und bei Auslösung den Auslösehebel in Richtung Entklinken der Verklinkungsstelle verschwenkt.The invention is therefore characterized in that a detent on the latch lever with a return on the rotatably mounted, cooperating with the electromagnetic release and the thermal release trigger lever forms the Verklinkungsstelle, and that a rotatably mounted hammer is provided, on the one hand by the thermal release and on the other hand, the electromagnetic release is pivotable and pivoted when triggered the release lever in the direction of unlatching the Verklinkungsstelle.

Gemäß einer besonders vorteilhaften Ausgestaltung ist der Schlaghebel ein Doppelarmhebel, dessen Drehachse zwischen Verklinkungsstelle und elektrischem Auslöser angeordnet ist, wobei dessen erster Arm mit dem Klinkenhebel und dessen zweiter Arm mit dem thermischen und magnetischen Auslöser zusammenwirkt.According to a particularly advantageous embodiment of the hammer is a Doppelarmhebel, the axis of rotation between Verklinkungsstelle and electrical release is arranged, wherein the first arm cooperates with the latch lever and the second arm with the thermal and magnetic trigger.

Gemäß einer weiteren Ausführungsform kann der zweite Arm den Anker des elektromagnetischen Auslösers überdecken.According to another embodiment, the second arm may cover the armature of the electromagnetic release.

In vorteilhafter Weise liegt die Drehachse des Schlaghebels ortsfest auf einer Linie, die durch die Lagerstellen des Auslöse-oder Schlaghebels und des Schaltgriffes gebildet ist, wobei diese Linie etwa senkrecht zur Befestigungsebene bzw. zur Frontwand verläuft.Advantageously, the axis of rotation of the hammer is fixed on a line which is formed by the bearing points of the trigger or impact lever and the control handle, this line is approximately perpendicular to the mounting plane or to the front wall.

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

Aufgrund der erfindungsgemäßen Ausgestaltung wird die Abstimmung zwischen Entklinkung vor dem Aufschlagen des Kontakthebels erheblich verbessert, da die Toleranzkette gegenüber derjenigen des bisherigen Schaltschlosses in dem Schalter S2 der Firma ABB Stotz-Kontakt GmbH, Heidelberg, erheblich verkürzt worden ist. Die Abstimmung liegt dabei in einem Teil im Auslösehebel. Der Schlagstift trifft dabei auf den Auslösehebel welcher sich bis zur Entklinkung bewegt und dann erst auf den beweglichen Kontaktträger zu dessen Öffnung auftritt.Due to the configuration of the invention, the vote between unlatching before striking the contact lever is significantly improved, since the tolerance chain has been shortened compared to that of the previous switch lock in the switch S2 of the company ABB Stotz contact GmbH, Heidelberg, considerably. The vote is in one part in the release lever. The striker hits on the release lever which moves until the unlatching and only then occurs on the movable contact carrier to the opening.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung und weitere Vorteile näher erläutert und beschrieben werden.Reference to the drawing, in which an embodiment of the invention is shown, the invention and further advantageous refinements and improvements of the invention and other advantages will be explained and described in detail.

Es zeigen:

Fig. 1
eine Teileinsicht in ein Schaltgerät, in Ausschaltstellung,
Fig. 2
eine der Fig. 1 entsprechende Teilansicht, in Einschaltstellung,
Fig. 3 und Fig. 4
je eine Ansicht, die den in Figuren 1 und 2 dargestellten Ansichten des Schaltgerätes entsprechen, bei Beginn der Auslösung und beim Ende der Auslösung, wobei die
Show it:
Fig. 1
a partial view into a switching device, in off position,
Fig. 2
one of the Fig. 1 corresponding partial view, in closed position,
FIG. 3 and FIG. 4
one view each, the one in Figures 1 and 2 represented views of the switching device, at the beginning of the triggering and at the end of the triggering, wherein the

Fig 4 die Ansichten entsprechend Figuren 1 und 2 und die Figur 3 eine entsprechende Ansicht von der Rückseite der Ansichten, die in den Figuren 1 und 2 dargestellt sind. Fig. 4 the views accordingly Figures 1 and 2 and the FIG. 3 a corresponding view from the back of the views in the Figures 1 and 2 are shown.

Es sei Bezug genommen auf die Fig. 2.It is referred to the Fig. 2 ,

Ein Leitungsschutzschalter 10, der dort im Bereich seines Schaltwerkes teilweise zu sehen ist, besitzt ein Gehäuse 11, welches aus einem schalenförmigen Gehäuseunterteil und einem schalenförmigen Gehäuseoberteil zusammengesetzt ist. In der Ansicht gemäß den Figuren 1 und 2 ist das Gehäuseunterteil zu sehen; in den Figuren 3 und 4 ist dabei lediglich das Schaltwerk als solches mit einem Teil des Kontakthebels dargestellt, wobei das Gehäuse 11 weggelassen ist. Außerdem zeigt die Fig. 3 die Rückansicht des Schaltwerkes zur besseren Verdeutlichung.A circuit breaker 10, which is partially visible in the area of its switching mechanism, has a housing 11, which is composed of a cup-shaped housing lower part and a cup-shaped housing upper part. In the view according to the Figures 1 and 2 the lower part of the housing can be seen; in the FIGS. 3 and 4 only the rear derailleur is shown as such with a part of the contact lever, wherein the housing 11 is omitted. In addition, the shows Fig. 3 the rear view of the rear derailleur for better clarity.

Das Gehäuse ist in Sockelbauweise aufgebaut und besitzt eine vordere Frontwand 12, zwei hintere Frontwände 13 und 14, die nicht vollständig in der Zeichnung dargestellt sind, zwei vordere Seitenwände 15 und 16, die die vordere Frontwand 12 mit den hinteren Frontwänden verbinden; parallel zu der vorderen Frontwand bzw. den hinteren Frontwänden 13, 14 befindet sich eine nach unten hin das Gehäuse abschließende Befestigungswand, die in den Figuren 1 bis 4 nicht dargestellt ist und die auch für die Erfindung nicht von Bedeutung ist.The housing is of a pedestal type and has a front front wall 12, two rear front walls 13 and 14, not fully shown in the drawing, two front side walls 15 and 16 connecting the front front wall 12 to the rear front walls; parallel to the front front wall or the rear front walls 13, 14 is a downwards the housing final mounting wall, in the FIGS. 1 to 4 is not shown and which is not important for the invention.

Die vordere Frontwand 12 besitzt eine etwa halbkreisförmige Ausbeulung oder Vorwölbung 17, in deren Bereich an einem Lager 18 ein Schaltknebel 19 gelagert ist. Der Schaltknebel 19 ist ein Doppelarmhebel, mit einem Schaltgriff 20 und einem im Inneren des Schaltgerätes befindlichen augenförmigen Fortsatz 21; in dem augenförmigen Fortsatz 21 ist eine Durchgangsöffnung 22 eingebracht; der Mittelpunkt der Durchgangsöffnung 22, der Mittelpunkt des Lagers 18 und die Mittellinie des Schaltgriffes 20 liegen auf einer Linie bzw. fluchten miteinander.The front front wall 12 has an approximately semicircular bulge or protrusion 17, in the region of a bearing 18, a switch knob 19 is mounted. The switch knob 19 is a double-arm, with a handle 20 and a located inside the switching device eye-shaped projection 21; in the eye-shaped extension 21, a passage opening 22 is introduced; the center of the passage opening 22, the center of the bearing 18 and the center line of the control handle 20 are in line or aligned with each other.

Der Schaltgriff 20 ragt aus einer Öffnung 23 in der Vorwölbung 17 heraus.The switching handle 20 protrudes from an opening 23 in the protrusion 17 out.

In der Öffnung 22 ist ein Schenkel (nicht dargestellt) eines Bügels 24 eingesetzt, der eine U-Form hat, wobei der Steg 25 des Bügels in den Figuren 1 bis 4 sichtbar ist. Der andere Schenkel des U-förmigen Bügels 24 greift in eine Durchbrechung 26 einer Lasche 27 sowie in ein Langloch 28 eines Klinkenhebels 29 ein und wird darin geführt. Das Schaltgerät umfasst weiterhin einen Auslösehebel 100, der um die Achse 18 des Schaltgriffes 19 drehbar gelagert ist. An diesem Auslösehebel 100 befindet sich ein Rücksprung 101, der mit einer Rastnase 30 am Klinkenhebel 29 die Verklinkungsstelle bildet. Die Rastnase 30 am Klinkenhebel 29 ist an dem Ende des Klinkenhebels 29 angeformt, die gegenüber der Lasche 27 (siehe Fig. 2) entgegengesetzt liegt, also am entgegengesetzten Ende einer Gelenkachse 33 zwischen einem Kontakthebel 34 und der Lasche 27. Die Verklinkungsstelle wird demgemäß im Folgenden mit den Bezugsziffern 30/101 bezeichnet, siehe weiter unten. Das andere Ende der Lasche 27 ist mittels der Gelenkachse 33 mit dem Kontakthebel 34 gelenkig verbunden, der etwa mittig ein Langloch 35 aufweist, mit dem er an einem ortsfesten Zapfen 36 drehbar im Gehäuse 11 gelagert ist. Dadurch wird der Kontakthebel 34 ein Doppelarmhebel, dessen der Gelenkachse 33 entgegengesetzt liegender Hebel 37 das so genannte bewegliche Kontaktstück 38 trägt, welches mit einem feststehenden Kontaktstück 39 zusammenwirkt. Der Klinkenhebel 29 ist an seinem der Verklinkungsstelle 30, 101 entgegengesetzt liegenden Ende über eine Zapfenanordnung 40 in dem Gehäuse (sowohl im Gehäuseunterteil als auch im Gehäuseoberteil) drehbar gelagert.In the opening 22, a leg (not shown) of a bracket 24 is inserted, which has a U-shape, wherein the web 25 of the bracket in the FIGS. 1 to 4 is visible. Of the other leg of the U-shaped bracket 24 engages in an opening 26 of a tab 27 and in a slot 28 of a ratchet lever 29 and is guided therein. The switching device further comprises a release lever 100 which is rotatably mounted about the axis 18 of the control handle 19. At this trigger lever 100 is a recess 101 which forms the Verklinkungsstelle with a locking lug 30 on the pawl lever 29. The locking lug 30 on the pawl lever 29 is formed on the end of the pawl lever 29, opposite to the tab 27 (see Fig. 2 ) is opposite, ie at the opposite end of a hinge axis 33 between a contact lever 34 and the tab 27. The latching is accordingly hereinafter referred to by the reference numerals 30/101, see below. The other end of the tab 27 is pivotally connected by means of the hinge axis 33 with the contact lever 34, which has approximately centrally a slot 35 with which it is rotatably mounted on a stationary pin 36 in the housing 11. As a result, the contact lever 34 becomes a double-arm lever, whose lever axis 37, which is opposite to the hinge axis 33, carries the so-called movable contact piece 38, which cooperates with a fixed contact piece 39. The latch lever 29 is rotatably mounted at its latching point 30, 101 opposite end via a pin assembly 40 in the housing (both in the lower housing part and in the upper housing part).

Die Anordnung ist dabei so getroffen, dass die Lasche 27 und der Klinkenhebel 29 etwa in einer Linie liegen. In der Einschaltstellung, in der sich die Nase 30 an den Rücksprung 101 anlegt, befindet sich das Schaltschloss in der Einschaltstellung, wenn also das bewegliche Kontaktstück 38 das feststehende Kontaktstück 39 berührt, in einer ersten stabilen Lage, bei der die Mittelachse des Steges 25 seitlich, in der Ausführung gemäß Fig. 2 links, neben der Mittelachse der Lagerung bzw. des Drehlagers 18 des Schaltknebels 19 vorbeiläuft, so dass die Mittelachse des Schenkels 25 mit der durch die Mittelachse der Öffnung 22 und die Mittelachse der Lagerung 18 gebildeten Linie einen stumpfen Winkel einnimmt, der in Richtung der Verklinkungsstelle 30/101 geöffnet ist. Die Lasche 27 und der Klinkenhebel 29 liegen etwa parallel zu der vorderen Frontwand. In der Einschaltstellung drückt der Bügel 24 die Lasche von der Verklinkungsstelle 30/101 weg, so dass die dadurch entstehende Kraft die Einschaltkraft erzeugt. Das Langloch 35 legt sich mit seinem Ende, welches auf der Seite des Kontakthebels 34, auf der sich das bewegliche Kontaktstück befindet, an. Das Langloch 35 verläuft etwa senkrecht zur Längserstreckung des Kontakthebels 34.The arrangement is made such that the tab 27 and the latch lever 29 are approximately in line. In the closed position, in which the nose 30 rests against the recess 101, the switching mechanism is in the closed position, ie when the movable contact piece 38 contacts the fixed contact piece 39, in a first stable position, in which the central axis of the web 25 laterally , in the execution according to Fig. 2 left, next to the central axis of the bearing or the pivot bearing 18 of the switch knob 19 passes, so that the central axis of the leg 25 with the line formed by the central axis of the opening 22 and the central axis of the bearing 18 assumes an obtuse angle, in the direction of Verklinkungsstelle 30/101 is open. The tab 27 and the latch lever 29 are approximately parallel to the front front wall. In the closed position, the bracket 24 pushes the tab away from the latching point 30/101, so that the resulting force generates the switch-on force. The slot 35 lays down with its end, which on the side of the contact lever 34, on which the movable contact piece is located at. The slot 35 extends approximately perpendicular to the longitudinal extent of the contact lever 34th

Unterhalb der Drehachse 18, also zwischen der Drehachse 18 und dem elektromagnetischen Auslöser 46 ist ein Schlaghebel 102 vorgesehen, dessen Drehachse 103 auf einer Linie liegt, die etwa senkrecht zur Befestigungsebene durch die Achse 18 und parallel zu dieser verläuft. Der Schlaghebel 102 besitzt einen ersten Arm 104, der in den Bereich des Auslösehebels 100 reicht und mit einer Nase 105 zusammenwirkt, siehe auch Fig. 3. Der Schlaghebel 102 besitzt weiterhin einen zweiten Hebel 106, welches etwa zur Befestigungsebene vorspringt und mit seinem Ende den Schlagstift 48 überdeckt. Der Arm 104 springt zur Frontwand 12 vor und der Arm 104 sowie der Arm 106 bilden miteinander etwa eine Z-Form, wobei die Endabschnitte der Arme 104 und 106 etwa parallel zueinander verlaufen.Below the axis of rotation 18, ie between the axis of rotation 18 and the electromagnetic release 46, a hammer 102 is provided, the axis of rotation 103 is on a line which is approximately perpendicular to the mounting plane through the axis 18 and parallel to this. The hammer 102 has a first arm 104 which extends into the region of the trigger lever 100 and cooperates with a nose 105, see also Fig. 3 , The hammer 102 further has a second lever 106, which projects approximately to the mounting plane and covers the striker 48 with its end. The arm 104 projects toward the front wall 12, and the arm 104 and the arm 106 form a Z-shape with each other, and the end portions of the arms 104 and 106 are approximately parallel to each other.

An dem freien Ende des Armes 106 ist ein Ende 49 einer Verbindungsstange 50 angeschlossen, hierbei angelenkt, die mittels eines Zapfens 51, die senkrecht zur Zeichenebene in diese hineinragt und daher nur strichliert dargestellt ist, hinter einen Thermobimetallstreifen 52, der der thermische Auslöser ist, greift. Damit befindet sich der thermische Auslöser 52 zwischen dem Zapfen 51 und dem Abschnitt 106.At the free end of the arm 106, an end 49 of a connecting rod 50 is connected, hinged here, which by means of a pin 51, which projects perpendicular to the plane in this and therefore only shown in broken lines, behind a bimetallic strip 52, which is the thermal release, attacks. Thus, the thermal release 52 is located between the pin 51 and the portion 106th

Die Längsachse der Verbindungsstange 50 verläuft etwa senkrecht zur Längserstreckung des Thermobimetalls; in der Ausführung gemäß den Figuren 1 bis 4 bildet die Längserstreckung des Thermobimetalls 52 mit der Befestigungsseite einen spitzen Winkel, der zum elektromagnetischen Auslöser hin geöffnet ist.The longitudinal axis of the connecting rod 50 extends approximately perpendicular to the longitudinal extent of the bimetallic strip; in the execution according to the FIGS. 1 to 4 The longitudinal extent of the bimetallic strip 52 with the attachment side forms an acute angle, which is open towards the electromagnetic release.

Zwischen der linken Schmalseitenwand 15, also der Wand, der das Gelenk 33 benachbart liegt, und dem Kontakthebel im Bereich zwischen der Gelenkstelle 33 und dem Langloch 35 ist eine Druckfeder 53 vorgesehen, die den Kontakthebel im Uhrzeigersinn um die Lagerstelle 36 beaufschlagt, so dass die Druckfeder 53 die Ausschaltbewegung, also diejenige Bewegung des Kontakthebels 34 aus der Stellung gemäß Fig. 2 in die Stellung gemäß Fig. 1, unterstützt.Between the left narrow side wall 15, so the wall which is adjacent to the hinge 33, and the contact lever in the region between the hinge point 33 and the slot 35, a compression spring 53 is provided which acts on the contact lever clockwise about the bearing 36, so that the Compression spring 53, the switch-off, so that movement of the contact lever 34 from the position according to Fig. 2 in the position according to Fig. 1 , supported.

Wenn nun aufgrund eines Kurzschlussstromes der Schlaganker 48 sich in Pfeilrichtung P bewegt, drückt er auf den Arm 106 und verschwenkt dabei den Schlaghebel 102 um die Drehachse 103 im Uhrzeigersinn, wodurch die Verklinkungsstelle 30/101 entklinkt wird, siehe Fig. 3, so dass sich der Klinkenhebel 29 um seine Achse im Uhrzeigersinn verschwenken kann. Dabei gleitet der in der Öffnung 26 der Lasche 27 aufgenommene Schenkel des Bügels 24 im Langloch 28, bis er das entgegen gesetzte, in Fig. 1 bis 4 dargestellterechtes Ende des Langloches 28 erreicht hat. Dadurch wird die Kraft der Feder 53 freigegeben; das Ende des Langloches 35, das der Seite des Kontakthebels entgegen gesetzt liegt, an der sich das bewegliche Kontaktstück 38 befindet, legt sich gegen den ortsfesten Zapfen 36, so dass die Druckfeder 53 den Kontakthebel 34 ebenfalls gemäß dem Uhrzeigersinn verschwenken kann; dadurch gelangt der Kontakthebel in seine Ausschaltstellung, die mit Ende der Auslösung erreicht worden ist, siehe Fig. 4. Der Schaltgriff oder Schaltknebel 19 ist dabei freigegeben und kann sich in die Ausschaltstellung entgegen dem Uhrzeigersinn um die Achse 18 verdrehen, was durch eine Federanordnung 107 (siehe Fig. 4) erreicht wird. Dabei gibt das Langloch den Bügel 24 frei, so dass der Schaltknebel in die in der Fig. 1 dargestellte Ausschaltstellung, in der er mit seiner Nase 30 wieder hinter den Rücksprung 31 des Schlaghebels gelangt, gezogen wird. Nun kann eine Wiedereinschaltung des Schalters erfolgen, indem der Schaltgriff 19 aus seiner Ausschaltstellung im Uhrzeigersinn in die in der Fig. 1 dargestellte Einschaltstellung verbracht wird.If now due to a short-circuit current of the percussion armature 48 moves in the direction of arrow P, he presses on the arm 106 and thereby pivots the hammer 102 about the axis of rotation 103 in a clockwise direction, whereby the Verklinkungsstelle 30/101 is unlatched, see Fig. 3 so that the latch lever 29 can pivot about its axis clockwise. In this case, the received in the opening 26 of the tab 27 legs of the bracket 24 slides in the slot 28 until he the opposite, in Fig. 1 to 4 illustrated right end of the slot 28 has reached. As a result, the force of the spring 53 is released; the end of the elongated hole 35, which is opposite to the side of the contact lever, on which the movable contact piece 38 is located, bears against the stationary pin 36, so that the compression spring 53 can also pivot the contact lever 34 in the clockwise direction; This will bring the contact lever in its off position, which has been reached with the end of the trip, see Fig. 4 , The switching handle or switch knob 19 is released and can rotate in the off position counterclockwise about the axis 18, which by a spring assembly 107 (see Fig. 4 ) is achieved. The slot is the bracket 24 free, so that the switch knob in the in Fig. 1 shown off position, in which he passes with his nose 30 back behind the recess 31 of the hammer, is pulled. Now a reclosure of the switch can be done by the handle 19 from its off position in the clockwise direction in the in the Fig. 1 shown switched-on position is spent.

Wenn bei einem Kurzschlussstrom sich der thermische Auslöser 52 verbiegt, dann verbiegt sich das freie Ende etwa in Pfeilrichtung P und nimmt dabei über die Stange oder Verbindungsstange 50 den Abschnitt 106 des Schlaghebels mit, wodurch sich der Rücksprung 101 von der Nase 30 entfernt und dadurch die Verklinkungsstelle geöffnet wird. Der Beginn der Auslösung ist wieder in der Fig. 3 dargestellt; der weitere Ablauf ist der gleiche wie der oben beschriebene.If at a short-circuit current, the thermal release 52 bends, then the free end bends approximately in the direction of arrow P and takes over the rod or connecting rod 50 the portion 106 of the hammer with, whereby the return 101 of the nose 30 and thereby removes the Latching is opened. The beginning of the release is back in the Fig. 3 shown; the further procedure is the same as that described above.

Selbstverständlich kann das anhand eines Leitungsschutzschalters beschriebene Schaltschloss auch bei einem Fehlerstromschutzschalter verwendet werden; hierbei wäre anstatt des elektromagnetischen Auslösers 46, der auf Kurzschlussstrom reagiert, ein Auslöser zu verwenden, der auf einen Fehlerstrom reagiert.Of course, the switch lock described with reference to a circuit breaker can also be used in a residual current circuit breaker; In this case, instead of the electromagnetic release 46, which responds to short-circuit current, a trigger should be used which responds to a fault current.

Es besteht selbstverständlich auch die Möglichkeit, das Schaltschloss für einen Motorschutzschalter einzusetzen, bei dem anstatt eines Kontakthebels ein Kontaktträger vorgesehen ist, der eine Kontaktbrücke trägt, die im Einschaltzustand zwei feststehende Kontaktstücke, also ein Kontaktstückpaar, elektrisch leitend verbindet.Of course, it is also possible to use the switching mechanism for a motor protection switch, in which instead of a contact lever, a contact carrier is provided, which carries a contact bridge, which in the ON state two fixed contacts, so a pair of contact pieces, electrically conductively connects.

Am Auslösehebel 100 befindet sich eine Auflaufschräge 108, gegen die beim Auslösevorgang ein Fortsatz 109 der Lasche 27 zum Anschlag kommt, was aus Fig. 4 deutlich ersichtlich ist. Dadurch wird der Auslösehebel, der gegebenenfalls mit einem Auslösehebel in einem benachbart angeordneten Leitungsschutzschalter gekoppelt ist weiter in seine ausgelöste Stellung verschwenkt, so dass der Auslösehebel im benachbarten Leitungsschutzschalter sicher in seine Auslösestellung verbracht wird, so dass auch dort der Auslösevorgang so abläuft wie oben beschrieben.At the release lever 100 is a ramp be 108, against which during the triggering process an extension 109 of the tab 27 comes to a stop, which is made Fig. 4 is clearly visible. As a result, the release lever, which is optionally coupled to a release lever in an adjacently arranged circuit breaker is further pivoted to its triggered position, so that the trigger lever is safely spent in the adjacent circuit breaker in its release position, so that there also the triggering process proceeds as described above.

Claims (8)

  1. Electrical switching device, particularly line, motor or fault-current circuit breakers, with a front front wall (12), with a thermal release, with an electromagnetic release (46), with a switching mechanism with a latching point (30/101) and at least one contact point which is continuously opened or closed by means of the switching mechanism, with an operating handle (20) which is connected to one end of a lug (27) by means of a coupling element (25) and the other end of which is coupled to a contact base (34) carrying the moving contact member (38), and with a latching lever (29) which, together with a release lever (100), forms the latching point, the contact base (34) for the moving contact member (38) being located between the thermal release (52) and the electromagnetic release (46), characterized in that a latching tab (30) on the latching lever (29), together with a recess (101) on the rotatably supported release lever (100) interacting with the electromagnetic release (46) and the thermal release (52) forms the latching point, and in that a striking lever (102) is provided, which is mounted such that it can rotate, can be pivoted on the one hand by the thermal release (52) and on the other hand by the electromagnetic release (46), and, on release, pivots the release lever (100) in the direction to unlatch the latching point.
  2. Electrical switching device according to Claim 1, characterized in that, on electromagnetic release, the striking pin (48) of the electromagnetic release (46) acts on the striking lever (102), and the striking lever (102) firstly pivots the release lever (100) in the direction to unlatch the latching point and then strikes the contact base (34) in order to open the contact point.
  3. Electrical switching device according to Claim 1 or 2, characterized in that the thermal release (52) is coupled to the release lever (100) by means of a connecting rod (50) passing over the contact base, so that both the thermal release (52) and the electromagnetic release (46) open the latching point in the event of an overcurrent and/or short-circuit current.
  4. Switching device according to one of the preceding claims, characterized in that the striking lever (102) is a double-armed lever whose axis of rotation is arranged between the latching point and the electromagnetic release (46), with its first arm (104) interacting with the latching lever (29), and its second arm (106) interacting with the thermal (52) and electromagnetic release (46).
  5. Electrical switching device according to Claim 4, characterized in that the second arm (106) covers the striking pin (48) of the electromagnetic release (46).
  6. Electrical switching device according to Claim 5, characterized in that the axis of rotation (103) of the striking lever (102) is located in a fixed position on a line which extends approximately perpendicular to the front front wall (12) through the bearing point (18) of the operating handle (20).
  7. Electrical switching device according to one of the preceding claims, characterized in that a spring arrangement is provided which permanently loads the striking lever in such a manner that it moves the striking pin (48) of the electromagnetic release (46) to its ready-to-release position at the end of tripping, as a result of which the latching point is latched again.
  8. Electrical switching device according to one of the preceding claims, characterized in that the release lever (100) has an incline (108) with which a projection (109) on the lug (27) makes contact during the release process, so that the release lever (100) is pivoted further into its released position.
EP06015649.4A 2005-08-31 2006-07-27 Electrical switching device Active EP1760748B1 (en)

Applications Claiming Priority (1)

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DE102005041231A DE102005041231B4 (en) 2005-08-31 2005-08-31 Electrical switching device

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EP1760748A3 EP1760748A3 (en) 2008-05-14
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US (1) US7528690B2 (en)
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CN (1) CN1929068B (en)
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DE102005041231A1 (en) 2007-03-01
EP1760748A3 (en) 2008-05-14
EP1760748A2 (en) 2007-03-07
CN1929068A (en) 2007-03-14
US20070046403A1 (en) 2007-03-01
US7528690B2 (en) 2009-05-05
DE102005041231B4 (en) 2009-11-26
CN1929068B (en) 2012-10-03
CA2557682C (en) 2014-01-21
CA2557682A1 (en) 2007-02-28

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