EP2365510A1 - Leistungsschalter - Google Patents

Leistungsschalter Download PDF

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Publication number
EP2365510A1
EP2365510A1 EP10354083A EP10354083A EP2365510A1 EP 2365510 A1 EP2365510 A1 EP 2365510A1 EP 10354083 A EP10354083 A EP 10354083A EP 10354083 A EP10354083 A EP 10354083A EP 2365510 A1 EP2365510 A1 EP 2365510A1
Authority
EP
European Patent Office
Prior art keywords
contact
contact arm
arms
strand
lever
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
EP10354083A
Other languages
English (en)
French (fr)
Other versions
EP2365510B1 (de
Inventor
Yves Belin
Christophe Michelot
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2365510A1 publication Critical patent/EP2365510A1/de
Application granted granted Critical
Publication of EP2365510B1 publication Critical patent/EP2365510B1/de
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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • 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
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to the field of circuit breaker or differential circuit breaker-type breaking devices, in particular unipolar and neutral circuit breakers.
  • circuit breakers are often used in terminal distribution installations, especially in buildings, to protect an electrical circuit by cutting both the phase conductor and the neutral conductor.
  • the invention relates to an insulating housing cut-off device containing movable contacts, including at least one moving phase contact and a moving neutral contact carried by a first end of at least two contact arms respectively, each contact arm. being mounted around a pivot to at least allow pivoting of said contact arm to a closed position of said contacts, said device having contact pressure means acting on said contact arms to exert a contact pressure force on said contact arms; contact arm.
  • the patent application EP0042778 discloses a unipolar and neutral circuit breaker having two moving contacts of respectively a phase circuit and a neutral circuit, said contacts being carried by contact arms of insulating material pivotally mounted about an axis carried by a plate-shaped support a control mechanism, said support being pivotally mounted on a fixed axis.
  • a spiral contact pressure spring is mounted around the axis of pivoting of the contact arms and makes it possible to urge said contact arms in the closed position of the movable contacts.
  • a disadvantage of the circuit breaker of the prior art is that the dimensioning and the arrangement of the contact pressure spring are not optimized.
  • the aim of the invention is to remedy the drawbacks of the prior art cut-off devices by proposing an insulating housing cut-off device enclosing movable contacts, including at least one moving phase contact and a moving neutral contact carried by a first end. of respectively at least two contact arms, each contact arm being mounted around a pivot to at least allow pivoting of said contact arm to a closed position of said contacts, said device comprising contact pressure means acting on said contact arm for exerting a contact pressure force on said contact arms, said device being characterized in that the contact pressure means comprise two torsion springs acting independently on said contact arm respectively carrying the moving phase contact and said contact arm carrying the movable contact of neutral, each torsion spring exer a torsional force about an axis of rotation of said spring, each torsion spring being arranged relative to the contact arm on which it acts so that the axis of rotation of said spring is shifted to a second end of said arm of contact, relative to the axis of said pivot.
  • the device comprises a control mechanism provided with a support lever bearing the pivot about which the contact arms are mounted, said support lever being articulated to move the contact arms between an open position and the closed position said movable contacts, each torsion spring being disposed between the contact arm on which said torsion spring acts and said support lever.
  • the support lever is articulated around an axis coinciding with the axis of the pivot.
  • each torsion spring comprises a first strand (35, 36) bearing against a stopper of the support lever and a second strand acting on one of the contact arms.
  • the second strand of each torsion spring cooperates with an abutment of the contact arm on which said torsion spring acts, said stop being offset relative to the pivot towards the second end of said contact arm.
  • the abutment of the contact arm is provided on the second end of said contact arm.
  • the first strand of each contact spring has a length greater than the length of the second strand of said contact spring.
  • the length of the first strand is greater than at least twice the length of the second strand.
  • the first strands of the torsion springs are connected to form an elastic assembly comprising said two torsion springs.
  • the circuit breaker 1 comprises an insulating housing 3 essentially formed by two half-shells, the upper half-shell having been removed to allow the inside of said circuit breaker to be seen.
  • the housing 3 has a parallelepipedal general shape corresponding to a modular system.
  • the housing 3 has a rear fixing surface 5 on a rail and a front face 7 having a passage opening of a control lever 9.
  • the circuit breaker 1 comprises a neutral cut-off circuit and a phase cut-off circuit arranged respectively on either side of an insulating partition 11 interposed between the two half-shells and extending parallel to the main faces of the housing 3. On the figure 1 only the phase-breaking circuit is visible, the neutral-breaking circuit being arranged behind the insulating partition 11.
  • the phase-breaking circuit comprises a mobile phase contact 13 carried by a first end of a contact arm 15.
  • the neutral cut-off circuit comprises a moving neutral contact 17 carried by a first end of Another contact arm 19.
  • the contact arms 15, 19 are made of an insulating material and are pivotally mounted on a pivot 21.
  • the circuit breaker 1 comprises a control mechanism housed in the upper part of the housing 3, above the insulating partition 11. This control mechanism is common to the movable phase contact 13 and the moving neutral contact 17.
  • the pivot 21 articulation of the contact arms 15, 19 is carried by a support lever 23 ( figure 5 ) in the form of a plate, often called platinum, said support lever being pivotally mounted on the housing.
  • the support lever 23 is pivotally mounted about an axis parallel to and coincident with the axis of the fulcrum pivot 21 of the contact arms 15, 19.
  • the pivot axis of the support lever 23 and the articulation pivot of the contact arms 15, 19 are materialized by a shaft 21 secured to said support lever 23.
  • the ends of the shaft 21 are mounted in bearings formed in the half-shells of the housing 3.
  • the contact arms 15, 19 also comprise bearings for driving said arms contact 15, 19 on the shaft 21 respectively on either side of the support lever 23.
  • the pivotal mounting of the support lever 23 on the housing 3 allows the movement of the contact arms 15, 19 between an open position of the movable contacts 13, 17 and a closed position of said movable contacts.
  • the support lever 23 carries stops capable of cooperating with the contact arms 15, 19 to rotate them around the shaft 21 towards the closed position of the movable contacts 13, 17.
  • a spring 90 mounted between the housing and the lever support 23 makes it possible to urge the support lever 23 in rotation around the shaft 21 towards the open position of the movable contacts 13, 17.
  • the pivotal mounting of the contact arms 15, 19 on the support lever 23 allows, for its part, a limited movement of said contact arms, in particular when the support lever 23 has been pivoted in the closed position of the movable contacts 13, 17 .
  • Each of the contact arms 15, 19 comprise a screen 26 which makes it possible to prevent particles generated by the electric arc from being interfered with in the control mechanism.
  • the screen 26 is arranged to slide along a fixed wall 61 to ensure the screen function during at least the beginning of the opening of the contacts.
  • the faces of the screen 26 and the fixed wall 27 facing each other are arranged sufficiently close to each other, to allow said fixed wall to scrape the face of said screen exposed to the electric arc, which makes it possible to avoid any deposit accumulation.
  • the control mechanism comprises contact pressure means acting on the contact arms 15, 19 to exert a pressing force on said contact arms and to force said contact arms in the closed position of the movable contacts 13, 17.
  • the contact pressure means comprise two torsion springs 31, 32 respectively acting on the contact arm 15 carrying the moving phase contact 13 and on the contact arm 19 carrying the moving neutral contact 17.
  • Each torsion spring 31, 32 is provided with an axis of rotation about which it exerts a torsion force.
  • the torsion springs 31, 32 are mounted so that their respective axes of rotation are offset relative to the shaft 21 towards a second end of the contact arms. This second end of the contact arms 15, 19 is in this case opposite to the first end of said arms carrying the movable contacts 13, 17.
  • This positioning of the springs 31, 32 and their respective axes of rotation can increase the force exerted by said springs on the contact arms 15, 19 and thus on the movable contacts 13, 17 carried by said contact arms.
  • This positioning of the springs 31, 32, and in particular the positioning of their respective axes of rotation, also makes it possible to reduce their dimensions.
  • each torsion spring 31, 32 is disposed between the contact arm 15, 19 on which said torsion spring acts and the support lever 23.
  • the torsion springs 31, 32 are sized to exert pressure closing the movable contacts 13, 17 allowing limited pivoting of the contact arms 15, 19 relative to the support lever, depending on the state of wear of said contacts.
  • the torsion springs 31, 32 are not dimensioned to pivot the contact arms 15, 19 from the open position to the closed position of the contacts 13, 17, this function being fulfilled by the support lever 23.
  • the sizing torsion springs 31, 32 is therefore made with respect only to the contact pressure force to be exerted, and the dimensions of said springs are thus reduced.
  • the torsion springs 31, 32 used are coil springs.
  • Each torsion spring 31, 32 comprises a first strand 35, 36 bearing against a stopper 39 of the support lever and a second strand 41, 42 acting on one of said contact arms 15, 19.
  • the second strand 41, 42 each torsion spring 31, 32 cooperates with a stop 45, 46 of the contact arm 15, 19 on which said torsion spring acts.
  • This abutment 45, 46 is offset relative to the shaft 21, materializing the pivot of the contact arm 15, 19, towards the second end of said opposite contact arm relative to the first end carrying the movable contacts 13, 17.
  • the abutment 45, 46 of the contact arm 15, 19 is formed on the second end of said contact arm.
  • the turns of the torsion springs 31, 32 surrounding the axis of rotation of said springs are offset relative to the shaft 21. In this way, in addition to increasing the contact pressure force and reducing the dimensions of the means of contact pressure 31, 32, the size of the control mechanism at the shaft 21 is reduced. Given the complexity of the control mechanism concerning the articulations around the shaft 21, this offset of the turns of the torsion springs 31, 32 with respect to the shaft 21 makes it possible to simplify said control mechanism and to facilitate its assembly.
  • the first strands 35, 36 of the torsion springs 31, 32 are connected together to form a single elastic assembly incorporating said torsion springs.
  • the first strand 35, 36 of each torsion spring 31, 32 has a length greater than the length of the second strand 41, 42 of said torsion spring. More specifically, the length of the first strand 35, 36 is greater than at least twice the length of the second strand 41, 42. This arrangement makes it possible in particular to facilitate the assembly of the control mechanism, notably thanks to the length of the strands which allows the bending necessary for mounting on the axes of the springs.
  • the control mechanism of the circuit breaker can be such as that described in the European patent application EP0295158 .
  • control mechanism comprises transmission means arranged between the lever 9 and the contact arms 15, 19, or more precisely between said lever and the support lever 23. These transmission means make it possible to move the support lever 23 between the open position and the closed position of the movable contacts 13, 17.
  • a trip lever 53 coupled to tripping means makes it possible to detect the presence of an electrical fault and to act on the control mechanism to open the contacts of the circuit breaker.
  • the triggering means include an electromagnetic release 55 and a thermal release, in this case a bimetallic strip 57.
  • the release lever 53 is pivotally mounted on an axis 59 carried by the support lever 23, with a predetermined offset with respect to the pivot 21.
  • the release lever 53 is designed to actuate the displacement of the contact arms 15, 19 in the open position by causing the breaking of a breakable mechanical link 61 of the transmission means (FIG. figures 1 and 2 ).
  • the transmission means include a transmission rod 51 coupled to an internal base of the lever to form a toggle joint whose articulation is eccentric with respect to a pivot axis 63 of said joystick.
  • the breakable mechanical link 61 is formed between the transmission rod 51 and the support lever 23. In the locked position, the breakable mechanical link 61 allows the manual control of the control mechanism by means of the lever 9.
  • the movement of the lever triggering 53 to a triggered position under the action of the trigger 55 causes the momentary break of the mechanical link 61, causing the automatic triggering of the control mechanism, independently of the lever 9.
  • the release lever 53 is associated with a spring of recall (not shown) for ensuring the automatic restoration of the mechanical link 61 when the lever 9 is actuated to the open position, following a triggering of the fault control mechanism.
  • the breakable mechanical link 61 comprises a catch hook 65 pivotally mounted on an axis 67 of the support lever 23. At the opposite of the axis 67, the hook spike 69 cooperates in the locked position of the link 61 with a notch 71 located on the upper arm of the trip lever 53.
  • the transmission rod 51 is coupled to the hook 65 at a hinge point may move when triggered in a light lever support 23. This light is blind or open, and is shaped in a circular sector centered on the axis 67.
  • the hinge point is located between the axis 67 and the beak 69 of the hook hook.
  • the breakable mechanical link 61 constitutes a reduction stage in the kinematic chain of the control mechanism, allowing a reduction of the triggering force from the magnetothermal release.
  • the bimetallic strip 57 of the thermal actuator cooperates with the trip lever 53 by means of a rotary slide valve 81 with unidirectional transmission.
  • the slide 81 is formed by a bent lever having one end freely coupled to the lower arm of the release lever 53 at a hinge point 83.
  • the curved intermediate portion of the transmission lever is supported on a boss 85 of the release lever 53 of in order to drive the latter to the triggered position during the deflection to the right of the bimetallic strip 51 in the event of circulation of a current of overload in the pole.
  • the slide 81 constitutes a rigid kinematic link between the bimetallic strip 57 and the trip lever 53.
  • the hinge point 83 is disposed between the boss 85 and the pivot axis 21 of the trip lever 53.
  • the purpose of this arrangement of the pivot axis 83 closest to the pivot axis 21 is to minimize the displacement of the axis 83 along an arc of a circle centered on the axis 21, see FIG. make it null, when the magnetic release 55 propels the support lever 23.
  • the end 87 of the slide 81 opposite the hinge point 83 is capable of abutting against a protuberance of the housing, with rupture of the kinematic connection with the release lever 53.
  • the support lever 23 can pivot about the pivot 21 in the trigometric direction, and the intermediate zone of the slide 81 is spaced from the boss 85.
  • the pivot point 83 of the slide 81 may well heard to be confused with the pivot axis 21 of the trip lever 53.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Manufacture Of Switches (AREA)
EP10354083.7A 2010-03-01 2010-11-29 Leistungsschalter Active EP2365510B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1000821A FR2956922B1 (fr) 2010-03-01 2010-03-01 Dispositif de coupure

Publications (2)

Publication Number Publication Date
EP2365510A1 true EP2365510A1 (de) 2011-09-14
EP2365510B1 EP2365510B1 (de) 2013-11-13

Family

ID=42752099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10354083.7A Active EP2365510B1 (de) 2010-03-01 2010-11-29 Leistungsschalter

Country Status (5)

Country Link
EP (1) EP2365510B1 (de)
CN (1) CN102194617B (de)
ES (1) ES2531060T3 (de)
FR (1) FR2956922B1 (de)
RU (1) RU2549366C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104167333A (zh) * 2014-08-20 2014-11-26 加西亚电子电器有限公司 一种小型断路器
EP3171385A4 (de) * 2014-07-17 2018-02-21 Chint Group Corporation Betriebsvorrichtung eines mehrpoligen miniaturschutzschalters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2996678B1 (fr) 2012-10-05 2014-10-31 Schneider Electric Ind Sas Dispositif de commande d'un appareil de protection electrique et appareil de protection electrique le comportant
CN105590804B (zh) * 2014-11-04 2018-03-27 西门子公司 断路器的分闸机构及其断路器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042778A1 (de) 1980-06-19 1981-12-30 Merlin Gerin Einpol- und Nulleiter-Kleinschalter
EP0208614A1 (de) * 1985-07-05 1987-01-14 Telemecanique Stromabgrenzer mit einem sichtbaren Anzeiger
EP0295158A1 (de) 1987-06-09 1988-12-14 Merlin Gerin Steuermechanismus eines elektrischen Kleinschalters
JPH0431243U (de) * 1990-07-10 1992-03-13
EP0569650A1 (de) * 1992-05-13 1993-11-18 Hager Electro S.A. Phasen- und Nulleiter-Schutzschalter
EP0696041A1 (de) * 1994-08-04 1996-02-07 Legrand Schutzschalter
EP1146534A1 (de) * 2000-04-11 2001-10-17 Felten & Guilleaume KG Schaltmechanik für einen Schutzschalter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708807A1 (de) * 1987-03-18 1988-10-06 Licentia Gmbh Elektrischer leistungsschalter mit einem elektro-dynamisch oeffnenden kontaktsystem
DE10204226C1 (de) * 2002-01-30 2003-04-24 Siemens Ag Geräteeinschub für eine Schaltanlage mit Hilfstrennkontakten
ITMI20050042A1 (it) * 2005-01-17 2006-07-18 Vimar Spa Interruttore magneto-termico-differenziale
US7566840B2 (en) * 2007-10-04 2009-07-28 General Electric Company Contact arm mechanism for circuit breaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042778A1 (de) 1980-06-19 1981-12-30 Merlin Gerin Einpol- und Nulleiter-Kleinschalter
EP0208614A1 (de) * 1985-07-05 1987-01-14 Telemecanique Stromabgrenzer mit einem sichtbaren Anzeiger
EP0295158A1 (de) 1987-06-09 1988-12-14 Merlin Gerin Steuermechanismus eines elektrischen Kleinschalters
JPH0431243U (de) * 1990-07-10 1992-03-13
EP0569650A1 (de) * 1992-05-13 1993-11-18 Hager Electro S.A. Phasen- und Nulleiter-Schutzschalter
EP0696041A1 (de) * 1994-08-04 1996-02-07 Legrand Schutzschalter
EP1146534A1 (de) * 2000-04-11 2001-10-17 Felten & Guilleaume KG Schaltmechanik für einen Schutzschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3171385A4 (de) * 2014-07-17 2018-02-21 Chint Group Corporation Betriebsvorrichtung eines mehrpoligen miniaturschutzschalters
CN104167333A (zh) * 2014-08-20 2014-11-26 加西亚电子电器有限公司 一种小型断路器

Also Published As

Publication number Publication date
EP2365510B1 (de) 2013-11-13
RU2549366C2 (ru) 2015-04-27
FR2956922A1 (fr) 2011-09-02
CN102194617A (zh) 2011-09-21
RU2011107621A (ru) 2012-09-10
FR2956922B1 (fr) 2012-08-24
ES2531060T3 (es) 2015-03-10
CN102194617B (zh) 2014-12-31

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