EP0325725B1 - Interrupteur basse tension avec levier de verrouillage - Google Patents

Interrupteur basse tension avec levier de verrouillage 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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP0325725A2 (fr
EP0325725A3 (fr
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0325725A2 publication Critical patent/EP0325725A2/fr
Publication of EP0325725A3 publication Critical patent/EP0325725A3/fr
Application granted granted Critical
Publication of EP0325725B1 publication Critical patent/EP0325725B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)

Claims (4)

  1. Interrupteur basse tension avec levier de verrouillage (11) et un levier moteur (13) mobile par actionnement d'une manette, lequel agit, au moyen d'un ressort moteur (18) sur une articulation coudée qui est reliée sur un côté à un arbre porte-contact (3) et de l'autre côté soit est logée fixement quand l'interrupteur basse tension fait office d'interrupteur-séparateur soit prend appui contre un levier à cliquet (8) qui commande le déclenchement par surintensité de courant de l'interrupteur quand l'interrupteur basse-tension sert d'interrupteur de protection, le ressort moteur (18), l'articulation coudée (5, 6) et le levier de verrouillage (11) pouvant être également montés en double pour un besoin de symétrie, et le levier de verrouillage (11) empêchant le passage de la manette d'actionnement en position d'arrêt en cas de contacts bloqués, caractérisé en ce que le levier de verrouillage sert de languette de verrouillage (11) présentant un contour d'application qui permet à la languette de verrouillage de servir, en position de marche de l'interrupteur, de butée à la languette supérieure (6) de l'articulation coudée, en ce qu'une extrémité de la languette de verrouillage (11) est logée de manière rotative et solidaire sur le porte-verrou (10) et l'autre extrémité est accouplée au levier moteur (13) et en ce que l'extrémité de la languette de verrouillage (11), accouplée au levier moteur (13), vient s'appliquer contre la languette supérieure (6) de l'articulation coudée pendant la mise hors service.
  2. Interrupteur basse tension selon la revendication 1, caractérisé en ce que l'accouplement entre la languette de verrouillage (11) et le levier moteur (13) s'effectue par l'intermédiaire d'un boulon d'entraînement (12), en ce que ce boulon d'entraînement (12) est guidé dans une coulisse du levier moteur (13) et en ce que le contour de la coulisse présente différentes sections avec lesquelles sont réglés la position de verrouillage du levier moteur et le moment d'interruption quand les contacts de l'interrupteur sont soudés.
  3. Interrupteur basse tension selon la revendication 1 ou 2, caractérisé en ce que le contour d'application de la languette de verrouillage (11) est configuré comm un ovale double.
  4. Interrupteur basse tension selon l'une des revendications 2 ou 3, caractérisé en ce que le boulon d'entraînement (12), en position de mise en marche de l'interrupteur, est appliqué contre un appendice (25) du porte-verrou (10).
EP88119728A 1988-01-26 1988-11-26 Interrupteur basse tension avec levier de verrouillage Expired - Lifetime EP0325725B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802184A DE3802184A1 (de) 1988-01-26 1988-01-26 Niederspannungsschalter mit sperrlaschen
DE3802184 1988-01-26

Publications (3)

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

Family

ID=6345987

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119728A Expired - Lifetime EP0325725B1 (fr) 1988-01-26 1988-11-26 Interrupteur basse tension avec levier de verrouillage

Country Status (2)

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

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

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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
DE3802184A1 (de) 1989-08-03
DE3852817D1 (de) 1995-03-02
EP0325725A2 (fr) 1989-08-02
DE3802184C2 (fr) 1990-05-17
EP0325725A3 (fr) 1991-03-27

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