EP1665317A1 - Commutateur electrique dote de surfaces d'encliquetage deplacees sous l'influence d'une force electrodynamique - Google Patents

Commutateur electrique dote de surfaces d'encliquetage deplacees sous l'influence d'une force electrodynamique

Info

Publication number
EP1665317A1
EP1665317A1 EP04762758A EP04762758A EP1665317A1 EP 1665317 A1 EP1665317 A1 EP 1665317A1 EP 04762758 A EP04762758 A EP 04762758A EP 04762758 A EP04762758 A EP 04762758A EP 1665317 A1 EP1665317 A1 EP 1665317A1
Authority
EP
European Patent Office
Prior art keywords
latching
stop
carrier
force
electrical switch
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
EP04762758A
Other languages
German (de)
English (en)
Other versions
EP1665317B1 (fr
Inventor
Marc Liebetruth
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1665317A1 publication Critical patent/EP1665317A1/fr
Application granted granted Critical
Publication of EP1665317B1 publication Critical patent/EP1665317B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • 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
    • H01H71/505—Latching devices between operating and release mechanism
    • H01H2071/507—Latching devices between operating and release mechanism being collapsible, e.g. yielding elastically, when the opening force is higher than a predetermined value
    • 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
    • H01H71/505—Latching devices between operating and release mechanism

Definitions

  • the invention is in the field of electrical switches which are provided with a movable contact and can be used in the structural design of a latch mechanism for latching the movable contact.
  • the latching device in which the movable contact can be moved from an off position to an on position via a drive train against the force of a contact force spring, and in which a latching device for latching the into its on position - Movable contact is provided, the latching device has a stop and a latch lever that can be supported on the stop.
  • the stop and the pawl lever are provided with latching surfaces which are assigned to one another (EP 0 466 287 B1). -
  • the stop can be displaced in a straight line from the latching position under the influence of the electrodynamic force of an incorrectly high current (in particular a short-circuit current) against the force of at least one return spring.
  • the stop which is designed as a half-wave, is guided along an elongated hole which is formed in a support structure of the switch.
  • the at least one return spring is designed as a leaf spring on which the half shaft rests. If the current is incorrectly high, the electrodynamic force of the current acts via the drive train and a coupling train on the ratchet lever supported at the stop.
  • the leaf spring bends in such a way that the half-wave while reducing the coverage of the latching surfaces from its latching Position is shifted in a straight line until the overlap of the
  • the invention is based on the object of making the release of the latching device more secure, in particular in the case of faulty high currents.
  • the stop for removing the overlap of the latching surfaces can be pivoted from a latching position under the influence of the electrodynamic force of a faulty high current against the force of at least one return spring.
  • a preferred embodiment of the new electrical switch provides that a first carrier and a second carrier are provided, each of which forms an abutment of the at least one return spring, the stop being rotatably mounted on the first carrier and the first carrier on the second carrier is pivotally held.
  • the stop, the first and the second carrier and the at least one return spring can be separate Assembly unit to be pre-assembled outside the switch.
  • This separate assembly unit can be easily integrated into already known electrical switches if they are to be used as current limiters.
  • a force-free assembly of the separate assembly unit is ensured in a preferred embodiment of the new electrical switch in that the first and the second carrier can be blocked relative to one another in the force direction of the at least one restoring spring when the at least one restoring spring is tensioned.
  • a blocking piece that limits the relative pivoting of the two carriers under the force of the at least one return spring.
  • the removal of the overlap of the latching surfaces caused by swiveling the stop under the influence of the electrodynamic force of a faulty high current is provided in addition to a removal of the overlap of the latching surfaces under the influence of a release line (32) by turning the stop (24) to be able to use an electrical switch, in particular a low-voltage circuit breaker, which is actuated in the usual way by electronic triggers or manually, as a current limiter.
  • a support contour is provided in the switch known from EP 0 466 287 B1. who attack the attack blocked at the start of the switch-on process in its latching position.
  • the invention provides for the support contour to be formed on a switching shaft, as is often found in the drive train of an electrical switch, in particular a low-voltage circuit breaker.
  • the formation of the support contour on the selector shaft which is very precisely positioned in a known manner, ensures that the stop at the start of the switch-on process is held in its latching position without play by the adjacent support contour.
  • the first carrier also has a support contour which interacts with the support contour of the selector shaft. At least one of the two support contours can be designed to be resilient, in order to ensure, for example, even when the support contours wear, that the stop is held in its latching position without play at the start of the switching-on process.
  • the first carrier in a preferred embodiment consists of two identically designed sections.
  • FIG. 1 shows a schematic illustration of an electrical switch with a switch lock
  • FIG. 2 to 4 the switch lock with a first and a second latching device in different switching positions of the electrical switch according to Figure 1 and Figures 5 and 6, a separate assembly unit assigned to the second latching device according to Figures 2 to 4.
  • 1 shows an electrical switch 1 in the form of a low-voltage circuit breaker with a switching contact system of a first switching pole and an associated arcing chamber 2.
  • the middle switching contact system consists of a fixed switching contact arrangement 3 and a movable switching contact arrangement 4.
  • the movable switching contact arrangement 4 has thereby a pivotable contact carrier 5 and several movable contacts 6 in the form of contact levers.
  • the movable contacts 6 can be pivoted parallel to one another and are resiliently supported on the contact carrier 5 by means of contact force springs 7 under pretension.
  • the movable switching contact arrangement 4 is coupled in a known manner to a switching shaft 9 of the drive train via a first lever arrangement 8 of a drive train, which is only indicated schematically in FIG.
  • the selector shaft 9 of the drive train simultaneously serves to drive further switch contact systems, not shown, which are arranged in parallel to the switch contact system shown and which are adjacent switch poles. It is to be transferred from an off position, in which the switch contact system is open, to an on position, in which the switch contact system is closed, by means of a drive device 10.
  • the contact force springs 7 are tensioned further, so that their force acts in the pivoting direction 11 of the selector shaft 9 pointing towards the off position.
  • the drive device 10 has a drive 13 provided with a storage spring 12, a second lever arrangement 14 of the drive train coupling the drive 13 to the control shaft 9, and a switch lock 15.
  • the key switch 15 has two latching devices in a known manner. According to FIG. 2, a first 16 of the latching devices is used to latch the tensioned storage spring 12 and the second 17 of the latching devices is used to latch the movable contact 6 in its on position.
  • a latching device is provided as the first latching device 16, as is already known from the document DE 101 20 783 Cl.
  • the releasable latching is realized by supporting a first latch lever 18 on a first stop 19 designed as a half-shaft.
  • the second latching device 17 is coupled to the drive train in a manner not shown, via a coupling train that is articulated to a knee joint of the second lever arrangement 14. It has a second ratchet lever 23 and a second stop 24, which is assigned to the ratchet lever 23 and is designed as a half-shaft.
  • the second latching device 17 is via a return spring acting on the second latch lever 23 25 held in an overstroke behind the second stop such that the latching surfaces 27, 28 of the second latch lever 23 and the second stop 24 are spaced apart.
  • the distance is about 1.5 mm. This distance is necessary to the second stop 24 of the second latching device 17 under the force of an associated with it to turn the first return spring 29 (see FIGS. 5 and 6) clockwise about its axis of rotation 30 into its latching position shown in FIG. 2.
  • the second stop 24 has a driver 31 (cf. also FIG. 6), which, in a known manner (DE 100 10 727 C2), manually by means of a trigger line 32 (cf. FIG. 1) - by means of a switch on the front of the switch arranged pushbutton 33 - or can be actuated by an electromagnet 34 in order to rotate the second stop 24 about its axis of rotation 30 counter to the force of the first return spring 29.
  • the overlap of the latching surfaces is reduced until it is lifted, whereby the movable contact is released for transferring to its OFF position.
  • a current-limiting tripping process is provided in order to release the latch faster, particularly in the event of short-circuit currents.
  • the second stop 24 with its axis of rotation 30 is rotatably mounted on a first carrier 35, the first carrier 35 in turn being pivotable about a pivot axis 36.
  • This pivot axis 36 runs parallel and at a distance from the axis of rotation 30, so that pivoting the first carrier 35 causes the second stop 24 to be displaced along an arc-shaped movement path.
  • the pivot axis 36 of the first carrier is mounted on a second carrier 38, the second carrier 38 being held stationary on a supporting structure 40 via a bolt 39.
  • the first 35 and the second 38 carrier each form an abutment for two second return springs 41.
  • the first carrier 35 Since the second carrier 38 is held stationary on the structure 40, the first carrier 35 is held under the force of the second return springs 41 in a rest position, in which the second stop 24 is in its latching position.
  • their electrodynamic force acts on the movable contact 6 and from there via the drive train, the coupling train and the second ratchet lever 23 on the second stop 24. Is this the torque resulting from the force component F and the lever arm 1? acts the first carrier 35, greater than the moment which acts on the first carrier 35 through the second return spring 41, then the first carrier 35 pivots counterclockwise about its pivot axis 36.
  • the second stop 24 pivots.
  • the pivoting displacement of the second stop 24 reduces the coverage of the latching surfaces 27, 28, in particular by rolling against one another, to such an extent that they finally canceled and thereby the second pawl lever 23 is released from the second stop 24.
  • the first carrier 35, the second carrier 38, the second stop 24 and the second return springs 41 form a separate assembly unit which ensures a current-limiting triggering process that is independent of the normal triggering process.
  • this separate assembly unit can be preassembled outside the electrical switch 1.
  • the first carrier 35 consists of two sections 35a, 35a in order to be able to accommodate the return springs 41 and the second stop 24.
  • the two sections 35a, 35a identically designed (so-called identical pieces).
  • the assembly unit can be mounted in the switch 1 without force by means of a blocking piece 42.
  • the blocking piece 42 is pushed between the two supports 35, 38 after tensioning the second return springs 41 in such a way that the relative
  • stop surfaces 44, 45 of the two supports bear against opposite sides 46, 47 of the blocking piece 42 under the force of the second return springs 41.
  • the second return springs 41 are tensioned and the relative pivoting of the two supports 35, 38 is blocked.
  • a support contour 50 which is formed on the selector shaft 9 and cooperates with a support contour 51 of the first carrier 35, keeps the first carrier in its rest position at the start of a switch-on process. This is u. a. required to prevent premature release of the second latching device 17 during the switch-on process by force peaks acting in the drive train.
  • at least one of the two support contours 50, 51 can be designed to be resilient.
  • a "normal" switch-off process initiated during the switch-on process (free tripping) is still possible because the second stop 24 can rotate about its axis of rotation 30 against the force of the first return spring 29. The "normal” tripping process can thus take place independently of the current-limiting tripping process blocked at the start of the switch-on process.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

L'invention concerne un commutateur électrique (1) doté d'un contact mobile (6) qui est déplacé par l'intermédiaire d'une ligne d'entraînement (8,9,14) contre la force d'un ressort à force de contact (7), d'une position ARRET en une position MARCHE. Ce commutateur comporte un dispositif d'encliquetage (17) pour mettre en prise le contact mobile (6) mis en position MARCHE, ce dispositif d'encliquetage (17) comprenant une butée (24) contre laquelle appuie un levier à cliquet (23), ce levier et cette butée étant dotés de surfaces d'encliquetage (27, 28) correspondantes. L'invention vise à réaliser un déverrouillage fiable du dispositif d'encliquetage (17) sur un commutateur de ce type. A cet effet, la butée (24) est déplacée par pivotement à partir de la position d'encliquetage pour soulever le recouvrement des surfaces d'encliquetage (27, 28) sous l'influence d'une force électrodynamique d'un courant trop élevé contre la force d'au moins un ressort de rappel (41).
EP04762758A 2003-09-19 2004-09-01 Commutateur electrique dote de surfaces d'encliquetage deplacees sous l'influence d'une force electrodynamique Expired - Fee Related EP1665317B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003144318 DE10344318B3 (de) 2003-09-19 2003-09-19 Elektrischer Schalter
PCT/DE2004/001975 WO2005029526A1 (fr) 2003-09-19 2004-09-01 Commutateur electrique dote de surfaces d'encliquetage deplacees sous l'influence d'une force electrodynamique

Publications (2)

Publication Number Publication Date
EP1665317A1 true EP1665317A1 (fr) 2006-06-07
EP1665317B1 EP1665317B1 (fr) 2008-11-05

Family

ID=32404469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04762758A Expired - Fee Related EP1665317B1 (fr) 2003-09-19 2004-09-01 Commutateur electrique dote de surfaces d'encliquetage deplacees sous l'influence d'une force electrodynamique

Country Status (3)

Country Link
EP (1) EP1665317B1 (fr)
DE (2) DE10344318B3 (fr)
WO (1) WO2005029526A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022078A1 (de) * 1990-07-10 1992-01-16 Siemens Ag Leistungsschalter mit unabhaengiger verklinkungseinrichtung des bewegbaren schaltkontaktes
FR2744563B1 (fr) * 1996-02-06 1998-04-03 Schneider Electric Sa Mecanisme de commande d'un disjoncteur a verrou debrayable sur un court-circuit
DE10120783C1 (de) * 2001-04-23 2002-11-14 Siemens Ag Schaltschloss zum Verklinken eines Federspeichers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005029526A1 *

Also Published As

Publication number Publication date
WO2005029526A1 (fr) 2005-03-31
DE10344318B3 (de) 2004-07-01
EP1665317B1 (fr) 2008-11-05
DE502004008425D1 (de) 2008-12-18

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