EP2634788A1 - Disjoncteur avec serrure de verrouillage - Google Patents

Disjoncteur avec serrure de verrouillage Download PDF

Info

Publication number
EP2634788A1
EP2634788A1 EP12193194.3A EP12193194A EP2634788A1 EP 2634788 A1 EP2634788 A1 EP 2634788A1 EP 12193194 A EP12193194 A EP 12193194A EP 2634788 A1 EP2634788 A1 EP 2634788A1
Authority
EP
European Patent Office
Prior art keywords
roller
circuit breaker
pawl
stop surface
switching mechanism
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
EP12193194.3A
Other languages
German (de)
English (en)
Other versions
EP2634788B1 (fr
Inventor
Thomas Bunk
Siegfried Pirker
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 EP2634788A1 publication Critical patent/EP2634788A1/fr
Application granted granted Critical
Publication of EP2634788B1 publication Critical patent/EP2634788B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3031—Means for locking the spring in a charged state
    • 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
    • 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
    • H01H2071/506—Latching devices between operating and release mechanism using balls or rollers in the latching device
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Definitions

  • a generic switch lock comprises a switching device for opening and closing a contact element which is in effect with a clamping element and a unlatching mechanism, by means of which the clamping element can be converted from a stressed state into an at least largely unrestrained state on the basis of a triggering signal.
  • Circuit breakers are special switches that are usually designed for high currents. These switches can not only switch operating currents and low overload currents, but also switch on high overload currents and short-circuit currents if faults occur, hold these fault currents for a predetermined time and then switch them off again. Depending on the embodiment, circuit breakers are single-pole or multi-pole.
  • Such circuit breakers regularly have so-called switching locks, which cause the switching off of a circuit when unwanted operating conditions, in particular short circuits, occur.
  • a switch lock represents a mechanical device, which preferably enables the switching off of a circuit.
  • the force of a tensioned spring is usually released to open the switch contact, which has been stretched when switching on a clamping mechanism.
  • the typical trigger criterion is a current of a predetermined current, through which the lock is released by means of an electromagnet or a heating bimetallic strip.
  • the circuit breaker of a circuit breaker has two main areas. On the one hand is a switching mechanism provided, acted upon by the spring force, the opening and closing of an electrical switching contact is realized. On the other hand, such a switching mechanism has a Entklinkungsmechanismus that releases the energy stored in a spring of the switching mechanism upon reaching a triggering criterion, whereby the switching mechanism is triggered and the electrical switching contact is opened.
  • the problem of the invention is the object of developing a Entklinkungsmechanismus a switching mechanism such that within a limited space, the force of the switching mechanism is minimized by the largest possible factor.
  • the decoupling mechanism to be specified should be characterized by a high release safety, which should be ensured, above all, by a low degree of friction within the unlatching mechanism.
  • Essential for a high release safety on the one hand that the release force is not too large and on the other hand, the release force remains approximately constant even after prolonged operation of the switch lock.
  • the unlatching mechanism should be designed such that the switch lock can be used both for single-pole switches, in which only small forces in the switching mechanism, as well as multi-pole switches with high forces in the switching mechanism.
  • the invention relates to a circuit breaker with a switch lock, on the one hand has a switching device for opening and closing a standing with a clamping element operatively connected switch contact and on the other hand a Entklinkungsmechanismus, on the basis of a trigger signal, the clamping element from a tensioned in an at least substantially unstressed state can be converted, that the switching contact is thereby opened.
  • the tensioning element is coupled to a tensioning lever, which is locked by a detent pawl of Entklinkungsmechanismus abuts against a stop surface of the tensioning lever and prevents it from moving, so that the spring element in tensioned Condition is maintained.
  • the switching mechanism has been developed such that the stop surface is curved and arranged to be movable relative to the clamping lever.
  • the execution of the abutment surface with a curved in the direction of the pawl outer contour at the same time movable mounting of the stop surface has the advantage that no flat contact surface between the pawl and the clamping lever exists, the pawl when triggering the switching mechanism relatively low friction moves over the stop surface and so Wear phenomena are minimized. In particular, it is ensured in this way that the pawl with different areas of the stop surface can be brought into contact and preferably only rolling friction between pawl and stop surface is formed.
  • the outer circumferential surface of a roller forms the stop surface.
  • the roller is preferably rotatably mounted on the clamping lever.
  • the end of the pawl contacts the abutment surface, ie the outer peripheral surface of the roller.
  • the switch lock triggers, the pawl is moved so that the force introduced via the pawl in the role of the clamping lever decreases, so that finally sets the clamping lever in motion and rolls the end of the pawl over the outer peripheral surface of the roller. The resulting friction is minimal.
  • the clamping lever is made in one piece and the roller rotatably mounted in a suitable recess by means of a bearing pin.
  • an alternative design provides that the clamping lever is designed in several parts, wherein in particular two planar-parallel plates, which are contoured in a suitable manner, are provided, and between these sheets, the roller is rotatably mounted about a bearing pin.
  • the stop surface and / or the free end of the pawl is provided with a surface coating.
  • a surface coating has a high wear resistance or ensures that the friction between the end of the pawl and the stop surface is at least minimized.
  • a roller whose outer peripheral surface forms the abutment surface is provided, it can be designed either as a sheet metal or as a plastic roller (ceramic materials, etc.). In a preferred manner, the roller is manufactured as a turned part.
  • the switching mechanism embodied according to the invention is therefore characterized in particular by the fact that in the unlatching mechanism, a stop surface curved in the direction of the free end of the pawl and movably arranged relative to the tensioning lever is provided. Preferably, in the locked state of the lock, a roller whose outer peripheral surface forms the abutment surface is engaged with the end of the pawl.
  • the solution according to the invention is characterized in that, despite the comparatively small size, the release force required for triggering the lock is minimized.
  • the switching mechanism designed according to the invention can thus be used in the same way for both single-pole and three-pole or four-pole switches. This is primarily due to the fact that the function of the unlatching mechanism is at least largely independent of the force in the switching mechanism.
  • FIG. 1 shows in a perspective view of the switching mechanism 1 of a circuit breaker.
  • the switching mechanism 1 shown here has two main components, namely the switching mechanism 2 on the one hand and the Entklinkungsmechanismus 3 on the other.
  • the switching mechanism 2 is the electrical switching contact of the circuit breaker in such a way with a spring used as an energy storage 4 in operative connection that when the contact is closed, the spring 4 is tensioned and when the switching mechanism 1, the energy stored in the spring 4 is released, so that the contact is opened by acting on him spring force.
  • the Entklinkungsmechanismus 3 is provided.
  • connection between the switching mechanism 2 with tension spring 4 and the Entklinkungsmechanismus 3 is made via a clamping lever 5, which can be locked or released by the Entklinkungsmechanismus 3 as needed.
  • a clamping lever 5 which can be locked or released by the Entklinkungsmechanismus 3 as needed.
  • An essential component of Entklinkungsmechanismus 3 is the pawl spring 10, which acts on the pawl 8 so that the end of the pawl 8 is moved against a designated stop surface of the clamping lever 5 for locking the clamping lever 5. Furthermore, in the unlatching mechanism 3, a triggering shaft 9 is provided which, upon reaching a triggering criterion, in particular as soon as the current in the switch reaches a predetermined current, is put into a rotary or pivoting movement. By the movement of the trip shaft 9, this device so in contact with the pawl 8, that also the pawl 8 is pivoted and so the force acting from the end of the pawl 8 on the stop surface of the clamping lever 5 force is reduced.
  • FIGS. 2 to 5 is the switching mechanism 1, whose components are already in FIG. 1 has been explained in more detail, shown in an on position.
  • the FIGS. 2 and 3 show the switch lock in a side view, the 4 and 5 in a perspective view, wherein the FIG. 3 and 5 show the switch lock each in a cutaway view.
  • the switching mechanism 1 is divided along the plane of symmetry and in each case only the components provided in the rear part are shown. This way, in the FIG. 3 and 5 the rear side part 14 of the clamping lever 5, the roller 7 mounted thereon and the end 12 of the pawl 8 visible.
  • the Entklinkungsmechanismus 3 and thus also the switching mechanism 1 is in a stretched state, wherein the end 12 of the pawl 8 touches the outer periphery of a rotatably mounted on the clamping lever 5 roller 7 in the region of the stop surface 13.
  • the pawl 8 of the clamping lever 5 With the help of the pawl 8 of the clamping lever 5 is thus locked in the position shown, so that the spring 4 is tensioned and the electrical switching contact is closed.
  • FIG. 6 shows a side view of the switching mechanism 1 in an operating state in which this is triggered.
  • the tripping shaft 9 is operated on the basis of a trigger signal, so that the pawl 8 counterclockwise from the Roller 7 is moved away. Then, the force with which the pawl 8 acts on the stop surface 13 of the roller 7 is reduced, the pawl 8 loses contact with the roller 7 and finally slips off the roller 7.
  • the tensioning lever 5 finally also performs a pivoting or pivoting movement in the counterclockwise direction, whereby the spring 4 is transferred to a relaxed state and thereby the electrical switching contact is opened.
  • FIGS. 7 and 8 now show the switching mechanism 1 of a circuit breaker in tripped position.
  • This position of a switching mechanism 1 is also referred to as a trip position.
  • the tensioning lever 5 with the roller 7 rotatably mounted thereon has been transferred to its end position upwards. In this case, he is on a clamping bolt 11 which is mounted in the shift lever 6, on. If the switching mechanism 1 is to be transferred from the trip position back to the on position, with respect to the switching mechanism 1, in particular the Entklinkungsmechanismus 3 a reset must be performed so that the Entklinkungsmechanismus 3 and here in particular the pawl spring 10 tensioned and the trip shaft 9 is reset to its original position.
  • FIGS. 9 to 11 is a known from the prior art latch compared with an inventively executed.
  • FIG. 3 shown side view of the arranged in the rear part of the switching mechanism 1 components.
  • the invention is characterized in particular by an advantageous design of the clamping lever side provided stop surface 13.
  • FIGS. 9 to 11 is a section of the switching mechanism 1 is shown in detail. This show the FIGS. 9 to 11 in each case the lying in the region of the Entklinkungsmechanismus 3 end of the clamping lever 5 with its stop surface 13 and the pawl 8.
  • the hereby in contact FIGS. 9 and 10 show in this context known from the prior art support the Pawl 8 on the stop surface 13 of the clamping lever 5.
  • an inventively executed latch which is realized by the use of a movably arranged curved stop surface 13, which is realized in this case by using the outer peripheral surface of a rotatably mounted on the clamping lever 5 roller 7.
  • FIG. 9 is a latch, as known from the prior art, shown in new condition. Between the end 12 of the pawl 8 and the stop surface 13, a flat contact surface is provided in this case. Furthermore, the vector of the release force F NVar , in the normal direction, that is perpendicular to the stop surface 13, and the lever arm h between the normal vector and a point K, by which the pawl 8 is rotated or pivoted, shown.
  • FIG. 10 shows the well-known support after a certain period of operation. It is essential that a certain wear has occurred due to the friction between the end 12 of the pawl 8 and the stop surface 13 on the stop surface 13 and the clamping lever 8. Due to the abrasion, the contour of the clamping lever 8 is slightly flattened in the region of the stop surface 13 with respect to the initial state. By this friction-related flattening of the contour of the clamping lever, the direction of the normal force F Nvarr changes, which in turn increases the release force of the switching mechanism 1 relative to the initial state.
  • FIG. 11 is now an embodiment of the invention Verklinkung a switching mechanism 1 shown.
  • the end 12 of the pawl 8 with the outer peripheral surface of a rotatably mounted on the clamping lever 5 roller 7 is engaged.
  • the use of a roller, by which a movable, outwardly curved stop surface 13 is realized, has the particular advantage that the wear on the supporting components is significantly reduced. Furthermore, the angle of the resulting normal force F N is held approximately constant by the support on the roller 7, so that the release force range is relatively small and does not increase with increasing life of the components.
  • FIG. 12 shows in a perspective detail view of an inventively designed clamping lever 5, which creates a connection between the spring element 4 of the switching mechanism 2 and the Entklinkungsmechanismus 3.
  • the tensioning lever 5 is designed substantially in two parts and has two plane-parallel clamping lever, in particular, this is 2 identical components, between which further components are arranged.
  • a roller 7 is provided which is rotatably supported in the clamping lever 5 via two bearing pins 16.
  • the roller 7 designed as a rotating part has an outer circumferential surface, which is used as a stop surface 13 for the pawl 8.
  • R represents the roller outer radius and the roller bearing radius.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP12193194.3A 2012-03-02 2012-11-19 Disioncteur avec serrure de verrouillage Active EP2634788B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012203295A DE102012203295A1 (de) 2012-03-02 2012-03-02 Schaltschloss für einen Leistungsschalter

Publications (2)

Publication Number Publication Date
EP2634788A1 true EP2634788A1 (fr) 2013-09-04
EP2634788B1 EP2634788B1 (fr) 2017-02-22

Family

ID=47471491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12193194.3A Active EP2634788B1 (fr) 2012-03-02 2012-11-19 Disioncteur avec serrure de verrouillage

Country Status (4)

Country Link
US (1) US9099259B2 (fr)
EP (1) EP2634788B1 (fr)
CN (1) CN103295851B (fr)
DE (1) DE102012203295A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012203294A1 (de) * 2012-03-02 2013-09-05 Siemens Aktiengesellschaft Schaltschloss eines Leistungsschalters
DE102014107266A1 (de) * 2014-05-22 2015-11-26 Eaton Industries Austria Gmbh Schaltgerät
CN108538686A (zh) * 2017-03-06 2018-09-14 上海良信电器股份有限公司 一种断路器跳闸装置
DE102018216210A1 (de) * 2018-09-24 2020-03-26 Siemens Aktiengesellschaft Schnell auslösende Verklinkung, Auslösemechanismus und Schnellerder, Schnellschalter oder Kurzschließer
CN111341606B (zh) * 2018-12-18 2021-12-31 天津平高智能电气有限公司 一种断路器及其操动机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807041A (en) * 1927-05-12 1931-05-26 Westinghouse Electric & Mfg Co Toggle latch
DE1221339B (de) * 1963-07-12 1966-07-21 Sachsenwerk Licht & Kraft Ag Kraftspeicherantrieb fuer elektrische Schaltgeraete
DE102005050693A1 (de) * 2005-10-18 2007-04-26 Siemens Ag Verklinkungsvorrichtung für einen Leistungsschalter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1989915U (de) * 1968-03-02 1968-07-25 Siemens Ag Elektrischer schalter mit verklinkbarem schaltmechanismus.
DE3002795C2 (de) * 1980-01-26 1982-08-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verklinkung des Schaltmechanismus eines Leitungsschutzschalters
FR2687249B1 (fr) * 1992-02-07 1994-04-01 Merlin Gerin Mecanisme de commande d'un disjoncteur a boitier moule.
US5534835A (en) * 1995-03-30 1996-07-09 Siemens Energy & Automation, Inc. Circuit breaker with molded cam surfaces
DE102009007478A1 (de) * 2009-01-30 2010-08-05 Siemens Aktiengesellschaft Schaltmechanismus für ein Schaltgerät, insbesondere für einen Niederspannungs-Leistungsschalter, mit entlasteter Verklinkung in einer Ausschalt- und Wiedergespannstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807041A (en) * 1927-05-12 1931-05-26 Westinghouse Electric & Mfg Co Toggle latch
DE1221339B (de) * 1963-07-12 1966-07-21 Sachsenwerk Licht & Kraft Ag Kraftspeicherantrieb fuer elektrische Schaltgeraete
DE102005050693A1 (de) * 2005-10-18 2007-04-26 Siemens Ag Verklinkungsvorrichtung für einen Leistungsschalter

Also Published As

Publication number Publication date
CN103295851A (zh) 2013-09-11
EP2634788B1 (fr) 2017-02-22
DE102012203295A1 (de) 2013-09-05
US20130228430A1 (en) 2013-09-05
US9099259B2 (en) 2015-08-04
CN103295851B (zh) 2017-01-18

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