EP0325725B1 - Low tension switch with catch lever - Google Patents

Low tension switch with catch lever Download PDF

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Publication number
EP0325725B1
EP0325725B1 EP88119728A EP88119728A EP0325725B1 EP 0325725 B1 EP0325725 B1 EP 0325725B1 EP 88119728 A EP88119728 A EP 88119728A EP 88119728 A EP88119728 A EP 88119728A EP 0325725 B1 EP0325725 B1 EP 0325725B1
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EP
European Patent Office
Prior art keywords
switch
lever
blocking
strap
low
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88119728A
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German (de)
French (fr)
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EP0325725A2 (en
EP0325725A3 (en
Inventor
Hans-Jürgen Ing.grad. Wulff
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.)
Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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Publication of EP0325725A2 publication Critical patent/EP0325725A2/en
Publication of EP0325725A3 publication Critical patent/EP0325725A3/en
Application granted granted Critical
Publication of EP0325725B1 publication Critical patent/EP0325725B1/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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker

Definitions

  • the invention relates to low-voltage switches with a locking lever, which can be designed as a disconnector or as a circuit breaker and in which the locking lever prevents the actuating handle from being transferred to the off position when the contacts of the switch are blocked, according to the preamble of claim 1.
  • a low-voltage circuit breaker which is equipped with a locking lever for breaking open blocked contacts.
  • This locking lever is rotatably mounted on the selector shaft.
  • the locking lever engages like a fork over a work surface on the drive lever of the actuating device and the joint of the knee joint lever, the fork having a suitable play with the abovementioned attachment points. If an attempt is made to turn off the circuit breaker when the movable contact block is blocked, the locking lever with its fork arm is first carried along over the working surface of the drive lever until the other fork arm is removed against the knee joint pin. With a certain amount of force on the actuating handle, the toggle levers can be bent in the switch-off direction.
  • an electrical switching device which acts as an emergency stop switch.
  • the switching device receives the mode of operation as an emergency stop switch in that the drive lever and the toggle lever articulated on the abutment have cooperating work surfaces in the switch-off direction, which exert a force component acting in the sense of separation on a switching element that remains incorrectly in the switched-on position. Also, a roller coupled to the drive lever comes to rest on the upper knee joint plate when it is switched off. An action of a locking lever for coupling the drive lever and the contact arm is not present in this switching device.
  • DE-U-80 23 509 shows a low-voltage circuit breaker with a locking lever against the transfer of the actuating handle to the off position when the movable contact block is blocked in the on position.
  • the locking lever is mounted in a bearing point formed in the housing base and is connected to the actuating handle with its end opposite the bearing point.
  • a working surface is formed by a bulge which, when switched on, is at a short distance from the knee joint pin of the knee lever.
  • the locking lever has an extension with a settlement that as Working surface cooperates with a counter surface of the movable contact.
  • the unwinding of the locking lever comes to rest on the contact piece carrier and blocks the further pivoting of the drive lever.
  • leverage around the bearing on the housing base can exert a force on the carrier, which in some cases is sufficient to separate the welded contact points.
  • the effect of the locking lever in this device is determined by the position of the selector shaft in the switch housing.
  • the invention has for its object to provide a simple, space-saving and at the same time directly acting locking mechanism in a compact switch lock regardless of the position and embodiment of the control shaft.
  • the invention has the advantage that the arrangement of the locking plate behind the upper knee joint plate requires no additional space in the switch housing and operational movements within the key switch are not hindered.
  • the function of the locking tab can be optimized in an advantageous manner by designing the guide link in the drive lever.
  • the movable contact 1 of the low-voltage circuit breaker is rotatably mounted on an axis 2 in a control shaft 3.
  • the bearing 4 of the control shaft 3 is arranged in a stationary manner in a switch housing, not shown.
  • the axis 2 is at the same time the point of attack of a lower knee joint bracket 5.
  • An associated upper knee joint bracket 6 is supported on a bolt 7 which is located on a latch lever 8.
  • the pawl lever 8 is used to trigger the overcurrent of the switch lock and is rotatably mounted on an axis 9, which in turn is mounted in a fixed position in a lock holder 10.
  • the lock holder 10 serves as a support frame for the switch lock of the switch and is in the switch housing - z. B.
  • the knee joint bracket 5 and 6 is arranged on both sides of the ratchet lever 8 and is connected in the middle to a knee joint pin 16.
  • two locking plates 11 are rotatably mounted on the axis 9. These locking tabs are over driving bolts 12 coupled to the drive lever 13, wherein the driving bolts 12 are guided in scenes of the drive lever 13.
  • the drive lever 13 is rotatably mounted on stationary bearing bolts 14 and is firmly connected to an actuating handle 15 which is led out of the switch housing.
  • Between the knee joint bolt 16 and a bolt 17 which is suspended in the upper region of the drive lever 13 are on both sides of the Pawl lever 8 each have a drive spring 18 arranged.
  • Lock holder 10 and drive lever 13 are also arranged on both sides of the pawl lever 8. With 22 a trigger shaft is shown, with which the triggering of the pawl lever 8 is controlled in a known manner.
  • Fig. 1 shows that in the operating position ON, the locking tabs 11 serve as a stop for the knee joints by the upper knee link tabs 6 come to rest on the locking tabs 11 in the contact points 20.
  • the driving bolts 12 are in this operating position on an extension 25 of the lock holder 10 and thus form a stop for the drive lever 13.
  • In the operating position ON there is an opening 23 between the movable contact 1 and the switching shaft 3, such that the short end of the contact 1 movement has against a stop surface of the control shaft 3.
  • the arrow 21 shows the direction of movement of the operating handle 15 when it is switched off.
  • the locking tabs 11 come into contact with the upper knee joint tabs 6 when they are switched off in the contact points 24.
  • the locking tabs 11 exert a torque in the opening direction of the knee joints on the upper knee joint tabs 6. If the force component of the springs migrates beyond the bolt 7 when the knee joints are opened, the knee joints collapse and the contacts are switched off.
  • Fig. 3 shows the process of switching off or tripping via the trigger shaft 22 when the contacts of the switch are welded.
  • the knee joints and also the selector shaft 3 move in the switch-off direction 21 to Through stroke 23 between contact 1 and selector shaft 3 is canceled.
  • the drive lever 13 with the coupled locking tabs 11 can only be tracked so far in the case of welded contacts that the locking tabs 11 come to rest on the upper knee-link tabs 6, which are in a blocked intermediate position after the through stroke 23 has been canceled. If one tried to move the actuating handle 15 further in the switch-off direction 21, the locking tabs 11 on the upper knee-link plates 6 would generate a moment in the switch-off direction.
  • the operating handle 15 would, however, only be able to be moved if the contact welding breaks open.
  • the function of the locking tabs 11 with regard to the blocking position of the drive lever 13 and the breaking force acting on the welded contacts can be optimized by designing the guide links for the bolts 12.
  • arrow 19 shows the direction of movement of the operating handle 15 when switched on. In the illustrated OFF position of the switch, there is no contact between the locking tabs 11 and the upper knee joint tabs 6.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Breakers (AREA)

Description

Die Erfindung betrifft Niederspannungsschalter mit Sperrhebel, die als Trenn- oder als Schutzschalter ausgeführt sein können und bei denen der Sperrhebel die Überführung des Betätigungshandgriffes in die Ausschaltstellung verhindert, wenn die Kontakte des Schalters blockiert sind, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to low-voltage switches with a locking lever, which can be designed as a disconnector or as a circuit breaker and in which the locking lever prevents the actuating handle from being transferred to the off position when the contacts of the switch are blocked, according to the preamble of claim 1.

Durch die DE-C-30 33 213 ist ein Niederspannungsschutzschalter bekanntgeworden, der mit einem Sperrhebel zum Aufbrechen von blockierten Kontakten ausgerüstet ist. Dieser Sperrhebel ist drehbar auf der Schaltwelle gelagert. Der Sperrhebel übergreift gabelartig eine Arbeitsfläche am Antriebshebel der Betätigungsvorrichtung und das Gelenk des Kniegelenkhebels, wobei die Gabel ein geeignetes Spiel zu den vorgenannten Anschlagpunkten aufweist. Wird bei blockiertem beweglichen Schaltstück der Versuch unternommen, den Schutzschalter auszuschalten, so wird zunächst über die Arbeitsfläche des Antriebshebels der Sperrhebel mit seinem Gabelarm mitgenommen, bis sich der andere Gabelarm gegen den Kniegelenkbolzen legt. Durch einen gewissen Kraftaufwand an dem Betätigungshandgriff lassen sich dann die Kniehebel im Ausschaltsinn durchknicken. Eine weitere Bewegung des Antriebshebels ist jedoch dann nicht möglich. Bei der Gestaltung des Gabelarmes des Sperrhebels muß dafür gesorgt werden, daß alle betriebsmäßigen Bewegungsabläufe innerhalb des Schutzschalters nicht behindert werden oder eine störende Abnutzung verhindert wird. Bei Schaltern mit formgepreßten Schaltwellen ist eine Verwendung dieses Sperrhebels problematisch. Da verschiedene Schalterbaureihen einen unterschiedlichen Abstand zwischen Schaltwelle und Kniegelenk aufweisen, ist außerdem für jede Baureihe ein abgestimmter Sperrhebel erforderlich.From DE-C-30 33 213 a low-voltage circuit breaker has become known, which is equipped with a locking lever for breaking open blocked contacts. This locking lever is rotatably mounted on the selector shaft. The locking lever engages like a fork over a work surface on the drive lever of the actuating device and the joint of the knee joint lever, the fork having a suitable play with the abovementioned attachment points. If an attempt is made to turn off the circuit breaker when the movable contact block is blocked, the locking lever with its fork arm is first carried along over the working surface of the drive lever until the other fork arm is removed against the knee joint pin. With a certain amount of force on the actuating handle, the toggle levers can be bent in the switch-off direction. A further movement of the drive lever is then not possible. When designing the fork arm of the locking lever, care must be taken to ensure that all operational movements within the circuit breaker are not obstructed or that disruptive wear is prevented. In the case of switches with compression-molded control shafts, the use of this locking lever is problematic. Since different switch series have a different distance between the control shaft and the knee joint, a coordinated locking lever is also required for each series.

In der DE-C-30 33 212 ist ein elektrisches Schaltgerät gezeigt, das als Notausschalter wirkt. Die Wirkungsweise als Notausschalter erhält das Schaltgerät dadurch, daß der Antriebshebel und der an dem Widerlager angelenkte Kniehebel im Ausschaltsinn zusammenwirkende Arbeitsflächen besitzen, die auf ein fehlerhaft in der Einschaltstellung verharrendes Schaltstück eine im Sinne der Trennung wirkende Kraftkomponente ausüben. Auch kommt hierbei eine mit dem Antriebshebel gekoppelte Rolle während des Ausschaltens an der oberen Kniegelenklasche zum Anliegen. Eine Einwirkung eines Sperrhebels zur Kopplung von Antriebshebel und Kontaktarm liegt bei diesem Schaltgerät nicht vor.In DE-C-30 33 212 an electrical switching device is shown which acts as an emergency stop switch. The switching device receives the mode of operation as an emergency stop switch in that the drive lever and the toggle lever articulated on the abutment have cooperating work surfaces in the switch-off direction, which exert a force component acting in the sense of separation on a switching element that remains incorrectly in the switched-on position. Also, a roller coupled to the drive lever comes to rest on the upper knee joint plate when it is switched off. An action of a locking lever for coupling the drive lever and the contact arm is not present in this switching device.

Die DE-U-80 23 509 zeigt einen Niederspannungsschutzschalter mit Sperrhebel gegen die Überführung des Betätigungshandgriffes in die Ausschaltstellung bei Blockierung des bewegbaren Schaltstückes in der Einschaltstellung. Der Sperrhebel ist in einer in dem Gehäuseboden eingeformten Lagerstelle gelagert und steht mit seinem der Lagerstelle gegenüberliegenden Ende mit dem Betätigungshandgriff in Verbindung. In dem mittleren Bereich des Sperrhebels ist durch eine Ausbuchtung eine Arbeitsfläche gebildet, die im Einschaltzustand dem Kniegelenkbolzen der Kniehebel mit geringem Abstand gegenüber steht. Ferner weist der Sperrhebel einen Fortsatz mit einer Abwicklung auf, die als Arbeitsfläche mit einer Gegenfläche des beweglichen Schaltstückes zusammen wirkt. Verharrt das bewegliche Schaltstück beim Ausschalten durch den Betätigungsgriff in der Einschaltstellung, so gelangt die Abwicklung des Sperrhebels zur Anlage an den Schaltstückträger und blockiert die weitere Schwenkung des Antriebshebels. Durch Druck auf den Betätigungsgriff läßt sich durch Hebelwirkung um das Lager am Gehäuseboden eine Kraftwirkung auf den Träger ausüben, die in manchen Fällen zur Trennung der miteinander verschweißten Kontaktstellen ausreicht. Die Wirkung des Sperrhebels ist bei dieser Vorrichtung mit durch die Lage der Schaltwelle im Schaltergehäuse bestimmt.DE-U-80 23 509 shows a low-voltage circuit breaker with a locking lever against the transfer of the actuating handle to the off position when the movable contact block is blocked in the on position. The locking lever is mounted in a bearing point formed in the housing base and is connected to the actuating handle with its end opposite the bearing point. In the central area of the locking lever, a working surface is formed by a bulge which, when switched on, is at a short distance from the knee joint pin of the knee lever. Furthermore, the locking lever has an extension with a settlement that as Working surface cooperates with a counter surface of the movable contact. If the moving contact piece remains in the switch-on position when it is switched off by the actuating handle, the unwinding of the locking lever comes to rest on the contact piece carrier and blocks the further pivoting of the drive lever. By pressing the actuating handle, leverage around the bearing on the housing base can exert a force on the carrier, which in some cases is sufficient to separate the welded contact points. The effect of the locking lever in this device is determined by the position of the selector shaft in the switch housing.

Der Erfindung liegt die Aufgabe zugrunde in einem kompakten Schaltschloß unabhängig von der Lage und Ausführungsform der Schaltwelle einen einfachen, raumsparenden und zugleich direkt wirkenden Sperrmechanismus zu schaffen.The invention has for its object to provide a simple, space-saving and at the same time directly acting locking mechanism in a compact switch lock regardless of the position and embodiment of the control shaft.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Weiterbildungen sind in den Unteransprüchen gegeben.This object is achieved by the features specified in the characterizing part of claim 1. Further training is given in the subclaims.

Die Erfindung hat den Vorteil, daß die Anordnung der Sperrlasche hinter der oberen Kniegelenklasche keinen zusätzlichen Platz im Schaltergehäuse benötigt und betriebsmäßige Bewegungsabläufe innerhalb des Schaltschlosses nicht behindert werden. Über die Gestaltung der Führungskulisse im Antriebshebel kann in vorteilhafter Weise die Funktion der Sperrlasche optimiert werden.The invention has the advantage that the arrangement of the locking plate behind the upper knee joint plate requires no additional space in the switch housing and operational movements within the key switch are not hindered. The function of the locking tab can be optimized in an advantageous manner by designing the guide link in the drive lever.

Anhand der Zeichnung soll ein Ausführungsbeispiel der Erfindung näher erläutet werden.

Fig. 1
zeigt für einen Niederspannungsschutzschalter die Baugruppe zur Betätigung des beweglichen Kontaktarmes, bestehend aus: beweglichen Kontaktarm, Schaltschloß, Antriebsmechanismus und Auslösebetätigung. Die Braugruppe ist in der EIN-Stellung des Schalters gezeigt.
Figur 2
zeigt die Baugruppe in einer Schalterstellung während des Ausschaltvorganges kurz bevor die Antriebsfedern die Totpunktlage erreicht haben.
Figur 3
zeigt die Baugruppe in der Endstellung des Antriebshebels bei verschweißten Kontakten.
Figur 4
zeigt die Baugruppe in der AUS-Stellung des Schalters.
Figur 5
zeigt einen Teil der Baugruppe in "Explosionsdarstellung".
An embodiment of the invention will be explained in more detail with reference to the drawing.
Fig. 1
shows for a low-voltage circuit breaker the assembly for actuating the movable contact arm, consisting of: movable contact arm, switch lock, Drive mechanism and release actuation. The brewing group is shown in the ON position of the switch.
Figure 2
shows the module in a switch position during the switch-off process shortly before the drive springs have reached the dead center position.
Figure 3
shows the assembly in the end position of the drive lever with welded contacts.
Figure 4
shows the module in the OFF position of the switch.
Figure 5
shows a part of the assembly in "exploded view".

Im Ausführungsbeispiel ist der bewegliche Kontakt 1 des Niederspannungsschutzschalters drehbar auf einer Achse 2 in einer Schaltwelle 3 gelagert. Die Lagerung 4 der Schaltwelle 3 ist ortsfest in einem nicht dargestellten Schaltergehäuse angeordnet. Die Achse 2 ist gleichzeitig Angriffspunkt einer unteren Kniegelenklasche 5. Eine dazugehörige obere Kniegelenklasche 6 stützt sich an einem Bolzen 7 ab, der sich an einem Klinkenhebel 8 befindet. Der Klinkenhebel 8 dient zur Überstromauslösung des Schaltschlosses und ist drehbar auf einer Achse 9 gelagert, die wiederum in einem Schloßhalter 10 ortsfest gelagert ist. Der Schloßhalter 10 dient als Tragrahmen für das Schaltschloß des Schalters und ist in dem Schaltergehäuse - z. B. durch Einnieten - befestigt. Die Kniegelenklasche 5 und 6 ist aus Symmetriegründen jeweils beidseitig vom Klinkenhebel 8 angeordnet und jeweils in der Mitte mit einem Kniegelenkbolzen 16 verbunden. In gleicher Ebene mit den oberen Kniegelenklaschen 6 sind drehbar auf der Achse 9 zwei Sperrlaschen 11 gelagert. Diese Sperrlaschen sind über Mitnahmebolzen 12 mit dem Antriebshebel 13 gekoppelt, wobei die Mitnahmebolzen 12 in Kulissen des Antriebshebels 13 geführt sind. Der Antriebshebel 13 ist drehbar an ortsfesten Lagerbolzen 14 gelagert und fest mit einem aus dem Schaltergehäuse herausgeführten Betätigungshandgriff 15 verbunden. Zwischen den Kniegelenkbolzen 16 und einem Bolzen 17, der im oberen Bereich des Antriebshebels 13 eingehängt ist, sind beidseitig von dem Klinkenhebel 8 je eine Antriebsfeder 18 angeordnet. Schloßhalter 10 und Antriebshebel 13 sind ebenfalls beidseitig des Klinkenhebels 8 angeordnet. Mit 22 ist eine Auslösewelle gezeigt, mit der in bekannter Weise die Auslösung des Klinkenhebels 8 gesteuert wird.In the exemplary embodiment, the movable contact 1 of the low-voltage circuit breaker is rotatably mounted on an axis 2 in a control shaft 3. The bearing 4 of the control shaft 3 is arranged in a stationary manner in a switch housing, not shown. The axis 2 is at the same time the point of attack of a lower knee joint bracket 5. An associated upper knee joint bracket 6 is supported on a bolt 7 which is located on a latch lever 8. The pawl lever 8 is used to trigger the overcurrent of the switch lock and is rotatably mounted on an axis 9, which in turn is mounted in a fixed position in a lock holder 10. The lock holder 10 serves as a support frame for the switch lock of the switch and is in the switch housing - z. B. by riveting - attached. For reasons of symmetry, the knee joint bracket 5 and 6 is arranged on both sides of the ratchet lever 8 and is connected in the middle to a knee joint pin 16. In the same plane with the upper knee joint plates 6, two locking plates 11 are rotatably mounted on the axis 9. These locking tabs are over driving bolts 12 coupled to the drive lever 13, wherein the driving bolts 12 are guided in scenes of the drive lever 13. The drive lever 13 is rotatably mounted on stationary bearing bolts 14 and is firmly connected to an actuating handle 15 which is led out of the switch housing. Between the knee joint bolt 16 and a bolt 17 which is suspended in the upper region of the drive lever 13 are on both sides of the Pawl lever 8 each have a drive spring 18 arranged. Lock holder 10 and drive lever 13 are also arranged on both sides of the pawl lever 8. With 22 a trigger shaft is shown, with which the triggering of the pawl lever 8 is controlled in a known manner.

Fig. 1 zeigt, daß in der Betriebsstellung EIN die Sperrlaschen 11 als Anschlag für die Kniegelenke dienen, indem die oberen Kniegelenklaschen 6 an den Sperrlaschen 11 in den Berührungspunkten 20 zum Anliegen kommen. Die Mitnahmebolzen 12 liegen in dieser Betriebsstellung an einem Fortsatz 25 des Schloßhalters 10 und bilden somit einen Anschlag für den Antriebshebel 13. In der Betriebsstellung EIN besteht ein Durchhub 23 zwischen beweglichem Kontakt 1 und Schaltwelle 3, derart, daß das kurze Ende des Kontaktes 1 Bewegungsspiel gegenüber einer Anschlagfläche der Schaltwelle 3 besitzt. Der Pfeil 21 zeigt die Bewegungsrichtung des Betätigungshandgriffes 15 beim Ausschalten.Fig. 1 shows that in the operating position ON, the locking tabs 11 serve as a stop for the knee joints by the upper knee link tabs 6 come to rest on the locking tabs 11 in the contact points 20. The driving bolts 12 are in this operating position on an extension 25 of the lock holder 10 and thus form a stop for the drive lever 13. In the operating position ON, there is an opening 23 between the movable contact 1 and the switching shaft 3, such that the short end of the contact 1 movement has against a stop surface of the control shaft 3. The arrow 21 shows the direction of movement of the operating handle 15 when it is switched off.

Gemäß Fig. 2 gelangen die Sperrlaschen 11 beim Ausschalten in den Berührungspunkten 24 zur Anlage an die oberen Kniegelenklaschen 6. Diese Anlage erfolgt kurz bevor die Kraftkomponente der Antriebsfedern 18 über den Mittelpunkt des Bolzens 7 hinüberwandert. Die Sperrlaschen 11 üben auf die oberen Kniegelenklaschen 6 ein Drehmoment in Öffnungsrichtung der Kniegelenke aus. Wenn bei dem dadurch eingeleiteten Öffnen der Kniegelenke die Kraftkomponente der Federn über den Bolzen 7 hinauswandert, dann erfolgt das Zusammenbrechen der Kniegelenke und somit die Ausschaltung der Kontakte.According to FIG. 2, the locking tabs 11 come into contact with the upper knee joint tabs 6 when they are switched off in the contact points 24. The locking tabs 11 exert a torque in the opening direction of the knee joints on the upper knee joint tabs 6. If the force component of the springs migrates beyond the bolt 7 when the knee joints are opened, the knee joints collapse and the contacts are switched off.

Fig. 3 zeigt den Vorgang des Abschaltens oder auch des Auslösens über die Auslösewelle 22 wenn die Kontakte des Schalters verschweißt sind. Die Kniegelenke und auch die Schaltwelle 3 bewegen sich dabei so lange in Ausschaltrichtung 21 bis der Durchhub 23 zwischen Kontakt 1 und Schaltwelle 3 aufgehoben ist. Der Antriebshebel 13 mit den gekoppelten Sperrlaschen 11 kann bei verschweißten Kontakten nur so weit nachgeführt werden, bis die Sperrlaschen 11 an den oberen Kniegelenklaschen 6, die sich nach Aufhebung des Durchhubes 23 in einer blockierten Zwischenlage befinden, zur Anlage kommen. Würde man versuchen, den Betätigungshandgriff 15 weiter in Ausschaltrichtung 21 zu bewegen, so würden die Sperrlaschen 11 auf die oberen Kniegelenklaschen 6 ein Moment in Ausschaltrichtung erzeugen. Der Betätigungshandgriff 15 würde sich aber nur dann bewegen lassen, wenn dabei die Kontaktverschweißung aufbricht. Eine Optimierung der Funktion der Sperrlaschen 11 hinsichtlich der Blockierstellung des Antriebshebels 13 und der auf die verschweißten Kontakte einwirkenden Aufbrechkraft kann durch Gestaltung der Führungskulissen für die Bolzen 12 durchgeführt werden.Fig. 3 shows the process of switching off or tripping via the trigger shaft 22 when the contacts of the switch are welded. The knee joints and also the selector shaft 3 move in the switch-off direction 21 to Through stroke 23 between contact 1 and selector shaft 3 is canceled. The drive lever 13 with the coupled locking tabs 11 can only be tracked so far in the case of welded contacts that the locking tabs 11 come to rest on the upper knee-link tabs 6, which are in a blocked intermediate position after the through stroke 23 has been canceled. If one tried to move the actuating handle 15 further in the switch-off direction 21, the locking tabs 11 on the upper knee-link plates 6 would generate a moment in the switch-off direction. The operating handle 15 would, however, only be able to be moved if the contact welding breaks open. The function of the locking tabs 11 with regard to the blocking position of the drive lever 13 and the breaking force acting on the welded contacts can be optimized by designing the guide links for the bolts 12.

In Fig. 4 ist mit Pfeil 19 die Bewegungsrichtung des Betätigungshandgriffes 15 beim Einschalten gezeigt. In der dargestellten AUS-Stellung des Schalters liegt keine Berühung zwischen den Sperrlaschen 11 und den oberen Kniegelenklaschen 6 vor.In Fig. 4, arrow 19 shows the direction of movement of the operating handle 15 when switched on. In the illustrated OFF position of the switch, there is no contact between the locking tabs 11 and the upper knee joint tabs 6.

Claims (4)

  1. Low-voltage switch with a blocking lever (11) and a drive lever (13), which is movable by an actuating handle and which acts by means of a drive spring (18) on a toggle joint, which on the one hand is connected with a contact carrier shaft (2) and on the other hand is either mounted to be stationary if the low-voltage switch is constructed a cutoff switch or is supported at a pawl lever (8), by which the excess current release of the switch is controlled, if the low-voltage switch is constructed as protective switch, wherein the drive spring (18), toggle joint (5, 6) and blocking lever (11) can also be incorporated in double for reasons of symmetry and the blocking lever (11) prevents over-guiding of the actuating handle into the switch-off setting when the contacts are blocked, characterised thereby that the blocking lever is so constructed as a blocking strap (11) with a bearing profile that the blocking strap (11) serves in the switch-on setting of the switch as an abutment for the upper toggle joint strap (6), that one end of the blocking strap (11) is mounted at the lock holder (10) to be rotatable at a stationary location and the other end is coupled with the drive lever (13), and that the end, which is coupled with the drive lever (13), of the blocking strap (11) comes to bear against the upper toggle joint strap (6) during the switching off.
  2. Low-voltage switch according to claim 1, characterised thereby that the coupling between the blocking strap (11) and drive lever (13) is effected by way of an entraining pin (12), that this entraining pin (12) is guided in a guide of the driver lever (13) and that the profile of the guide has different sections, by which the blocking setting of the drive lever and the break-open moment is set in when the contacts of the switch are fused.
  3. Low-voltage switch according to claim 1 or 2, characterised thereby that the bearing profile of the blocking strap (11) is formed as a double oval.
  4. Low-voltage switch according to one of claims 2 or 3, characterised thereby that the entraining pin (12) bears against a projection (25) of the lock holder (10) in the switch-on setting of the switch.
EP88119728A 1988-01-26 1988-11-26 Low tension switch with catch lever Expired - Lifetime EP0325725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802184 1988-01-26
DE3802184A DE3802184A1 (en) 1988-01-26 1988-01-26 LOW VOLTAGE SWITCH WITH LOCKING LOBS

Publications (3)

Publication Number Publication Date
EP0325725A2 EP0325725A2 (en) 1989-08-02
EP0325725A3 EP0325725A3 (en) 1991-03-27
EP0325725B1 true EP0325725B1 (en) 1995-01-18

Family

ID=6345987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119728A Expired - Lifetime EP0325725B1 (en) 1988-01-26 1988-11-26 Low tension switch with catch lever

Country Status (2)

Country Link
EP (1) EP0325725B1 (en)
DE (2) DE3802184A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9570262B1 (en) 2015-09-28 2017-02-14 Siemens Industry, Inc. Apparatus and methods for a circuit breaker positive-off stop feature

Families Citing this family (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4116454A1 (en) * 1991-05-18 1992-11-19 Licentia Gmbh MECHANISM FOR A SELF-SWITCH
US5213206A (en) * 1991-05-29 1993-05-25 Westinghouse Electric Corp. Circuit breaker with positive on/off interlock
DE4227213C2 (en) * 1992-08-17 1995-08-31 Kloeckner Moeller Gmbh Switch lock for a circuit breaker
DE4420540A1 (en) * 1994-06-14 1995-12-21 Ruediger Wiederhold Game installation fee and rebate calculator e.g. for billiards
IT1292453B1 (en) 1997-07-02 1999-02-08 Aeg Niederspannungstech Gmbh ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES
DE19819242B4 (en) 1998-04-29 2005-11-10 Ge Power Controls Polska Sp.Z.O.O. Thermomagnetic circuit breaker
US6114641A (en) 1998-05-29 2000-09-05 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
DE19841685C2 (en) * 1998-09-11 2002-10-31 Aeg Niederspannungstech Gmbh switch
US6087913A (en) 1998-11-20 2000-07-11 General Electric Company Circuit breaker mechanism for a rotary contact system
US6037555A (en) 1999-01-05 2000-03-14 General Electric Company Rotary contact circuit breaker venting arrangement including current transformer
US6166344A (en) 1999-03-23 2000-12-26 General Electric Company Circuit breaker handle block
US6262872B1 (en) 1999-06-03 2001-07-17 General Electric Company Electronic trip unit with user-adjustable sensitivity to current spikes
US6268991B1 (en) 1999-06-25 2001-07-31 General Electric Company Method and arrangement for customizing electronic circuit interrupters
US6218917B1 (en) 1999-07-02 2001-04-17 General Electric Company Method and arrangement for calibration of circuit breaker thermal trip unit
US6188036B1 (en) 1999-08-03 2001-02-13 General Electric Company Bottom vented circuit breaker capable of top down assembly onto equipment
US6710988B1 (en) 1999-08-17 2004-03-23 General Electric Company Small-sized industrial rated electric motor starter switch unit
US6252365B1 (en) 1999-08-17 2001-06-26 General Electric Company Breaker/starter with auto-configurable trip unit
US6175288B1 (en) 1999-08-27 2001-01-16 General Electric Company Supplemental trip unit for rotary circuit interrupters
US6396369B1 (en) 1999-08-27 2002-05-28 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
US6232570B1 (en) 1999-09-16 2001-05-15 General Electric Company Arcing contact arrangement
US6326869B1 (en) 1999-09-23 2001-12-04 General Electric Company Clapper armature system for a circuit breaker
US6239395B1 (en) 1999-10-14 2001-05-29 General Electric Company Auxiliary position switch assembly for a circuit breaker
US6229413B1 (en) 1999-10-19 2001-05-08 General Electric Company Support of stationary conductors for a circuit breaker
US6317018B1 (en) 1999-10-26 2001-11-13 General Electric Company Circuit breaker mechanism
US6232856B1 (en) 1999-11-02 2001-05-15 General Electric Company Magnetic shunt assembly
US6377144B1 (en) 1999-11-03 2002-04-23 General Electric Company Molded case circuit breaker base and mid-cover assembly
ES2249875T3 (en) 1999-11-03 2006-04-01 AEG NIEDERSPANNUNGSTECHNIK GMBH & CO. KG ROTARY CONTACT ARM ARRANGEMENT FOR SWITCH.
US6300586B1 (en) 1999-12-09 2001-10-09 General Electric Company Arc runner retaining feature
US6310307B1 (en) 1999-12-17 2001-10-30 General Electric Company Circuit breaker rotary contact arm arrangement
US6184761B1 (en) 1999-12-20 2001-02-06 General Electric Company Circuit breaker rotary contact arrangement
US6172584B1 (en) 1999-12-20 2001-01-09 General Electric Company Circuit breaker accessory reset system
US6215379B1 (en) 1999-12-23 2001-04-10 General Electric Company Shunt for indirectly heated bimetallic strip
US6281461B1 (en) 1999-12-27 2001-08-28 General Electric Company Circuit breaker rotor assembly having arc prevention structure
US6346869B1 (en) 1999-12-28 2002-02-12 General Electric Company Rating plug for circuit breakers
US6211758B1 (en) 2000-01-11 2001-04-03 General Electric Company Circuit breaker accessory gap control mechanism
US6239677B1 (en) 2000-02-10 2001-05-29 General Electric Company Circuit breaker thermal magnetic trip unit
US6429759B1 (en) 2000-02-14 2002-08-06 General Electric Company Split and angled contacts
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US6281458B1 (en) 2000-02-24 2001-08-28 General Electric Company Circuit breaker auxiliary magnetic trip unit with pressure sensitive release
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US6204743B1 (en) 2000-02-29 2001-03-20 General Electric Company Dual connector strap for a rotary contact circuit breaker
US6448521B1 (en) 2000-03-01 2002-09-10 General Electric Company Blocking apparatus for circuit breaker contact structure
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US6459349B1 (en) 2000-03-06 2002-10-01 General Electric Company Circuit breaker comprising a current transformer with a partial air gap
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US6586693B2 (en) 2000-03-17 2003-07-01 General Electric Company Self compensating latch arrangement
US6472620B2 (en) 2000-03-17 2002-10-29 Ge Power Controls France Sas Locking arrangement for circuit breaker draw-out mechanism
US6559743B2 (en) 2000-03-17 2003-05-06 General Electric Company Stored energy system for breaker operating mechanism
FR2806548B1 (en) 2000-03-17 2002-08-23 Ge Power Controls France EXTRACTABLE MECHANISM FOR CIRCUIT BREAKERS
US6479774B1 (en) 2000-03-17 2002-11-12 General Electric Company High energy closing mechanism for circuit breakers
US6747535B2 (en) 2000-03-27 2004-06-08 General Electric Company Precision location system between actuator accessory and mechanism
US6373357B1 (en) 2000-05-16 2002-04-16 General Electric Company Pressure sensitive trip mechanism for a rotary breaker
DE10047566A1 (en) * 2000-09-22 2002-04-18 Mueller Jean Ohg Elektrotech Blocking device for supply system isolating blade has element for transferring blocking force directly from contact arrangement to isolating blade in event of short circuit
US6400245B1 (en) 2000-10-13 2002-06-04 General Electric Company Draw out interlock for circuit breakers
US6806800B1 (en) 2000-10-19 2004-10-19 General Electric Company Assembly for mounting a motor operator on a circuit breaker
US6429760B1 (en) 2000-10-19 2002-08-06 General Electric Company Cross bar for a conductor in a rotary breaker
US6531941B1 (en) 2000-10-19 2003-03-11 General Electric Company Clip for a conductor in a rotary breaker
US6362711B1 (en) 2000-11-10 2002-03-26 General Electric Company Circuit breaker cover with screw locating feature
US6380829B1 (en) 2000-11-21 2002-04-30 General Electric Company Motor operator interlock and method for circuit breakers
US6448522B1 (en) 2001-01-30 2002-09-10 General Electric Company Compact high speed motor operator for a circuit breaker
US6476337B2 (en) 2001-02-26 2002-11-05 General Electric Company Auxiliary switch actuation arrangement
US6678135B2 (en) 2001-09-12 2004-01-13 General Electric Company Module plug for an electronic trip unit
US6469882B1 (en) 2001-10-31 2002-10-22 General Electric Company Current transformer initial condition correction
US6804101B2 (en) 2001-11-06 2004-10-12 General Electric Company Digital rating plug for electronic trip unit in circuit breakers
CZ300139B6 (en) * 2006-03-06 2009-02-18 Oez, S. R. O. Electric apparatus switching gear, particularly power circuit breaker switching gear
DE102009033275B4 (en) * 2009-07-09 2011-05-19 Siemens Aktiengesellschaft breakers
CN101794685B (en) * 2010-02-11 2012-05-23 李乾伟 Decompression repulsion dynamic breaking device of breaker

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197582A (en) * 1962-07-30 1965-07-27 Fed Pacific Electric Co Enclosed circuit interrupter
DE2808609C3 (en) * 1978-02-28 1980-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Low voltage toggle switch
DE2831135B1 (en) * 1978-07-13 1979-11-15 Siemens Ag Low-voltage circuit breaker with an insulating material housing
DE3033213C2 (en) * 1980-08-29 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Low voltage circuit breaker with a locking lever
DE8023509U1 (en) * 1980-08-29 1980-11-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Low voltage circuit breaker for locking lever
DE3033212A1 (en) * 1980-08-29 1982-04-01 Siemens Ag Emergency cut=out switch with knee lever system - acting on contact blocks to ensure separation, even when welded together
IT8223118V0 (en) * 1982-10-07 1982-10-07 Sace Spa ELECTRIC SWITCH WITH STOPPING THE CONTROL LEVER STROKE IN CASE OF WELDING THE CONTACTS.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9570262B1 (en) 2015-09-28 2017-02-14 Siemens Industry, Inc. Apparatus and methods for a circuit breaker positive-off stop feature

Also Published As

Publication number Publication date
EP0325725A2 (en) 1989-08-02
DE3802184C2 (en) 1990-05-17
DE3802184A1 (en) 1989-08-03
EP0325725A3 (en) 1991-03-27
DE3852817D1 (en) 1995-03-02

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