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EP0325725A2 - Low tension switch with catch lever - Google Patents

Low tension switch with catch lever Download PDF

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Publication number
EP0325725A2
EP0325725A2 EP88119728A EP88119728A EP0325725A2 EP 0325725 A2 EP0325725 A2 EP 0325725A2 EP 88119728 A EP88119728 A EP 88119728A EP 88119728 A EP88119728 A EP 88119728A EP 0325725 A2 EP0325725 A2 EP 0325725A2
Authority
EP
European Patent Office
Prior art keywords
locking
lever
switch
low
knee joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88119728A
Other languages
German (de)
French (fr)
Other versions
EP0325725B1 (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
Original Assignee
Licentia Patent Verwaltungs GmbH
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Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
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 a circuit breaker and in which the locking lever prevents the transfer of the operating handle 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 working 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 then be bent in the switch-off direction.
  • DE 30 33 212 C2 shows an electrical switching device that 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.
  • An action of a locking lever for coupling the drive lever and contact arm is not present in this switching device.
  • the GM 80 23 509 shows a low-voltage circuit breaker with a locking lever to prevent the operating handle from being moved to the off position when the movable contact block is blocked in the on position.
  • the locking lever is mounted in a bearing formed in the housing base and is connected to the actuating handle with its end opposite the bearing.
  • 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 moving contact piece remains in the switch-on position when it is switched off by the actuating handle, the development of the locking lever comes to rest against the contact piece carrier and blocks the further pivoting of the drive lever.
  • a force effect can be exerted on the carrier by lever action around the bearing on the housing base, which force force is sufficient in some cases to separate the contact points welded together.
  • the effect of the locking lever is determined in this device 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 selector shaft 3 itself is fixed in the switch housing, not shown.
  • the axis 2 is also 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 serves to trigger the overcurrent of the switching 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 supporting frame for the switch lock of the switch and is fastened in the switch housing, for example by riveting.
  • 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 coupled via drive pins 12 to the drive lever 13, the drive pins 12 being guided in the link arms of the drive lever 13.
  • the drive lever 13 is rotatably mounted on stationary bearing bolts 14 and is fixedly connected to an actuating handle 15 which is led out of the switch housing.
  • 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 movable contact 1 and switching shaft 3, such that the short end of the contact 1 play has against a stop surface of the control shaft 3.
  • the arrow 21 shows the direction of movement of the operating handle 15 when switching off.
  • the locking tabs 11 come into contact with the upper knee joint tabs 6 in the contact points 24. This contact occurs shortly before the force component of the drive springs 18 moves over the center of the bolt 7.
  • 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 control 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 located in a blocked intermediate position after lifting the through stroke 23. If one were to try to move the operating 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 actuating 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.

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

Abstract

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 Ausschaltestellung verhindert, wenn die Kontakte des Schalters blockiert sind.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 transfer of the operating handle to the off position when the contacts of the switch are blocked.

Der Sperrhebel ist als Sperrlasche (11) ausgebildet, die hinter der oberen Kniegelenklasche (6) in gleicher Ebene wie die Kniegelenk­lasche angeordnet ist, derart, daß ein Ende der Sperrlasche (11) orts­fest drehbar am Schloßhalter (10) gelagert und das andere Ende mit dem Antriebshebel (13) gekoppelt ist, und das mit dem Antriebs­hebel (13) gekoppelte Ende der Sperrlasche (11) während des Aus­schaltens an die obere Kniegelenklasche (6) zum Anliegen kommt.The locking lever is designed as a locking tab (11), which is arranged behind the upper knee link (6) in the same plane as the knee link, such that one end of the locking tab (11) rotatably mounted on the lock holder (10) and the other end with the drive lever (13) is coupled, and the end of the locking tab (11) coupled to the drive lever (13) comes to rest on the upper knee joint tab (6) during the switching off.

Niederspannungsschalter

Figure imgaf001
Low voltage switch
Figure imgaf001

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 a circuit breaker and in which the locking lever prevents the transfer of the operating handle to the off position when the contacts of the switch are blocked, according to the preamble of claim 1.

Durch die DE 30 33 213 C2 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 30 33 213 C2 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 working 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 then 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. This switch is problematic for switches with compression-molded control shafts. 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 30 33 212 C2 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. Eine Ein­wirkung eines Sperrhebels zur Kopplung von Antriebshebel und Kontaktarm liegt bei diesem Schaltgerät nicht vor.DE 30 33 212 C2 shows an electrical switching device that 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. An action of a locking lever for coupling the drive lever and contact arm is not present in this switching device.

Das GM 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 Schaltstück­beim 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.The GM 80 23 509 shows a low-voltage circuit breaker with a locking lever to prevent the operating handle from being moved to the off position when the movable contact block is blocked in the on position. The locking lever is mounted in a bearing formed in the housing base and is connected to the actuating handle with its end opposite the bearing. 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 development of the locking lever comes to rest against the contact piece carrier and blocks the further pivoting of the drive lever. By pressing the actuating handle, a force effect can be exerted on the carrier by lever action around the bearing on the housing base, which force force is sufficient in some cases to separate the contact points welded together. The effect of the locking lever is determined in this device 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 Baugruppe ist in der EIN-Stellung des Schalters gezeigt.
  • Fig. 2 zeigt die Baugruppe in einer Schalterstellung während des Ausschaltvorganges kurz bevor die Antriebsfedern die Totpunktlage erreicht haben.
  • Fig. 3 zeigt die Baugruppe in der Endstellung des Antriebs­hebels bei verschweißten Kontakten.
  • Fig. 4 zeigt die Baugruppe in der AUS-Stellung des Schalters.
  • Fig. 5 zeigt einen Teil der Baugruppe in "Explosionsdarstel­lung".
An embodiment of the invention will be explained in more detail with reference to the drawing.
  • 1 shows the assembly for actuating the movable contact arm for a low-voltage circuit breaker, consisting of: movable contact arm, switch lock, Drive mechanism and release actuation. The module is shown in the ON position of the switch.
  • Fig. 2 shows the module in a switch position during the switch-off process shortly before the drive springs have reached the dead center position.
  • Fig. 3 shows the assembly in the end position of the drive lever with welded contacts.
  • Fig. 4 shows the assembly in the OFF position of the switch.
  • Fig. 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 Schaltwelle 3 selbst ist ortsfest in dem nicht dargestellten Schaltergehäuse gelagert. 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 selector shaft 3 itself is fixed in the switch housing, not shown. The axis 2 is also 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 serves to trigger the overcurrent of the switching 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 supporting frame for the switch lock of the switch and is fastened in the switch housing, for example by riveting. 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 coupled via drive pins 12 to the drive lever 13, the drive pins 12 being guided in the link arms of the drive lever 13. The drive lever 13 is rotatably mounted on stationary bearing bolts 14 and is fixedly connected to an actuating handle 15 which is led out of the switch housing. Between the knee joint pin 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 movable contact 1 and switching shaft 3, such that the short end of the contact 1 play has against a stop surface of the control shaft 3. The arrow 21 shows the direction of movement of the operating handle 15 when switching 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 in the contact points 24. This contact occurs shortly before the force component of the drive springs 18 moves over the center of the bolt 7. 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 control 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 located in a blocked intermediate position after lifting the through stroke 23. If one were to try to move the operating 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 actuating 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 (5)

1. Niederspannungsschalter mit Sperrhebel und einem durch einen Betätigungshandgriff bewegbaren Antriebshebel, der mittels einer Antriebsfeder auf ein Kniegelenk einwirkt, das auf der einen Seite mit einer Kontaktträgerwelle verbunden ist und auf der anderen Seite entweder ortsfest gelagert ist, wenn der Nieder­spannungsschalter als Trennschalter ausgeführt ist, oder sich an einem Klinkenhebel abstützt, mit dem die Überstromauslösung des Schalters gesteuert wird, wenn der Niederspannungsschalter als Schutzschalter ausgeführt ist, wobei Antriebsfeder, Kniege­lenk und Sperrhebel aus Symmetriegründen auch zweifach einge­baut sein können und der Sperrhebel die Überführung des Betäti­gungshandgriffes in die Ausschaltstellung bei blockierten Kon­takten verhindert, dadurch gekennzeichnet, daß der Sperrhebel als Sperrlasche (11) ausgebildet ist, die hinter der oberen Knie­gelenklasche (6) in gleicher Ebene wie die Kniegelenklasche an­geordnet ist, derart, daß ein Ende der Sperrlasche (11) ortsfest drehbar am Schloßhalter (10) gelagert und das andere Ende mit dem Antriebshebel (13) gekoppelt ist, und das mit dem Antriebs­hebel (13) gekoppelte Ende der Sperrlasche (11) während des Aus­schaltens an die obere Kniegelenklasche (6) zum Anliegen kommt.1.Low-voltage switch with locking lever and a drive lever which can be moved by an actuating handle and which acts on a knee joint by means of a drive spring, which is connected on one side to a contact carrier shaft and on the other side is either mounted in a fixed position if the low-voltage switch is designed as a disconnector, or is supported on a ratchet lever with which the overcurrent release of the switch is controlled if the low-voltage switch is designed as a circuit breaker, the drive spring, knee joint and locking lever can also be installed twice for reasons of symmetry, and the locking lever can be used to move the operating handle into the switch-off position when the contacts are blocked prevents, characterized in that the locking lever is designed as a locking tab (11), which is arranged behind the upper knee joint bracket (6) in the same plane as the knee joint bracket, such that one end of the locking bracket (11) stationary dr stored on the lock holder (10) and the other end with the drive lever (13) is coupled, and the end of the locking tab (11) coupled to the drive lever (13) comes to rest on the upper knee joint tab (6) during the switching off. 2. Niederspannungsschalter nach Anspruch 1, dadurch gekennzeich­net, daß die Kopplung zwischen Sperrlasche (11) und Antriebs­hebel (13) über einen Mitnahmebolzen (12) erfolgt, daß dieser Mitnahmebolzen (12) in einer Kulisse des Antriebshebels (13) geführt ist und daß die Kontur der Kulisse verschiedene Ab­schnitte aufweist, mit denen die Sperrstellung des Antriebs­hebels und das Aufbrechmoment bei verschweißten Kontakten des Schalters eingestellt wird.2. Low-voltage switch according to claim 1, characterized in that the coupling between the locking tab (11) and drive lever (13) via a driving pin (12) that this driving pin (12) is guided in a backdrop of the drive lever (13) and that Contour of the backdrop has different sections with which the locking position of the drive lever and the break-open torque is set when the switch contacts are welded. 3. Niederspannungsschalter nach Anspruch 1 oder 2, dadurch ge­kennzeichnet, daß die Anlagenkontur des Sperrlasche (11) als Doppeloval ausgebildet ist.3. Low-voltage switch according to claim 1 or 2, characterized in that the system contour of the locking tab (11) is designed as a double oval. 4. Niederspannungsschalter nach einem der Ansprüche 1 bis 3, daduch gekennzeichnet, daß die Anlagenkontur der Sperrlasche (11) so ausgebildet ist, daß die Sperrlasche (11) in der Ein­schaltstellung des Schalters als Anschlag für die obere Knie­gelenklasche (6) dient.4. Low-voltage switch according to one of claims 1 to 3, characterized in that the system contour of the locking tab (11) is designed such that the locking tab (11) serves as a stop for the upper knee joint tab (6) in the switched-on position of the switch. 5. Niederspannungsschalter nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Mitnahmebolzen (12) in der Einschaltstellung des Schalters an einem Fortsatz (25) des Schloßhalters (10) anliegt.5. Low-voltage switch according to one of claims 2 to 4, characterized in that the driving bolt (12) abuts an extension (25) of the lock holder (10) in the switched-on position 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 true EP0325725A2 (en) 1989-08-02
EP0325725A3 EP0325725A3 (en) 1991-03-27
EP0325725B1 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)

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US8638183B2 (en) 2009-07-09 2014-01-28 Siemens Aktiengesellschaft Power switch having integrated trigger and drive unit

Also Published As

Publication number Publication date
DE3852817D1 (en) 1995-03-02
EP0325725B1 (en) 1995-01-18
DE3802184C2 (en) 1990-05-17
EP0325725A3 (en) 1991-03-27
DE3802184A1 (en) 1989-08-03

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