EP1360709A1 - Dispositif a contact de commutation - Google Patents

Dispositif a contact de commutation

Info

Publication number
EP1360709A1
EP1360709A1 EP02708231A EP02708231A EP1360709A1 EP 1360709 A1 EP1360709 A1 EP 1360709A1 EP 02708231 A EP02708231 A EP 02708231A EP 02708231 A EP02708231 A EP 02708231A EP 1360709 A1 EP1360709 A1 EP 1360709A1
Authority
EP
European Patent Office
Prior art keywords
contact
spring
lever
switching
contact force
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
EP02708231A
Other languages
German (de)
English (en)
Other versions
EP1360709B1 (fr
Inventor
Günter Seidler
Detlev Schmidt
Sezai TÜRKMEN
Michael Sebekow
Michael Bach
Ingo Thiede
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 EP1360709A1 publication Critical patent/EP1360709A1/fr
Application granted granted Critical
Publication of EP1360709B1 publication Critical patent/EP1360709B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • the present invention relates to a switching contact arrangement with a contact carrier and a contact lever which is articulated on the contact carrier about a pivot point and with a contact force spring designed as a leaf spring for pressing the contact lever against a mating contact.
  • a switch contact arrangement of this type has become known as part of a low-voltage circuit breaker through US Pat. No. 5,517,164.
  • the contact force acting on the switching contacts of circuit breakers is applied in that the mentioned contact force springs are tensioned during switching on. This is done by means of a drive device belonging to the circuit breaker, the switching path of which is essentially constant over the intended service life of the circuit breaker. In contrast, the travel of the contact lever increases as a result of the erosion of the switching contacts, as a result of which the contact force decreases in accordance with the erosion. If it is to be ensured that a sufficient contact force is achieved even at the end of the service life of a switch contact arrangement, a corresponding dimensioning of the contact force springs can lead to an undesirably high contact force when the switch contact arrangement is new. This results in a correspondingly high energy requirement for the drive device.
  • the present invention has for its object to provide a circuit breaker in which the contact force depends less on the erosion of the contacts.
  • This object is achieved by the invention in a switch contact arrangement of the type mentioned at the outset in that the contact force spring is arranged in a rocker-like manner such that the ends of the contact force spring rest on the contact lever and a pivot bearing of the contact force spring is arranged between the pivot point of the contact lever and its contacting end part ,
  • the contact force of the switch contact arrangement according to the invention does not follow the known characteristic of a helical compression spring or a one-armed leaf spring according to the cited US Pat. No. 5,517,164. Rather, the dependence on contact erosion is largely reduced and can be largely eliminated by optimizing the geometry.
  • the contact force is essentially determined by a suitable choice of the preload. This also eliminates the need to oversize the contact force spring and the drive device, which has a favorable effect on the service life of the circuit breaker.
  • the pivot bearing of the contact force spring can preferably be moved along a sliding surface on the contact carrier without a fixed connection to the contact carrier depending on the respective spring force. Due to the non-stationary storage, the bearing point of the leaf spring arrangement changes depending on the position of the contact lever.
  • the pivot bearing of the contact force spring is formed by a kink of the contact force spring which bears on the essentially flat sliding surface on the contact carrier.
  • one end of the contact force spring is bent to form an abutment of the contact force spring and a recess is arranged on the contact lever for receiving the bent end.
  • the design of a switch contact arrangement according to the invention is particularly suitable for circuit breakers with a high rated current which have a plurality of contact levers in each pole.
  • the manufacture and assembly of the corresponding number of contact force springs can be simplified in that the contact force springs of all contact levers are part of a one-piece leaf spring.
  • FIG. 1 shows a switch contact arrangement with several contact levers, partly in a section II-II in FIG. 2.
  • Figure 2 shows the switching contact arrangement according to Figure 1 with a view of the parallel contact lever.
  • FIG. 3 is a detail of the switch contact arrangement according to FIGS. 1 and 2, shown on an enlarged scale.
  • Figures 4, 5 and 6 show a further embodiment in representations corresponding to Figures 1, 2 and 3.
  • FIG. 7 shows a leaf spring, which has contact force springs for several contact levers, in a perspective view.
  • the switch contact arrangement shown in FIGS. 1, 2 and 3 comprises a contact carrier 1, which is mounted in a pivot bearing (not shown) by means of bearing pins 12.
  • Contact levers 2 are connected to the contact carrier 1 in an articulated manner about a pivot point 11.
  • the contact levers 2 have a contact-making end part 18 and are connected in an electrically conductive manner to a lower connecting bar 4 at the opposite end by only indicated flexible conductors 13.
  • rocker-like contact force springs 8 which are therefor ensure that the contact-making end parts 18 of the contact levers 2, when the switch contact arrangement is switched on, have sufficient contact force against a mating contact 5 which carries an arcing horn 3.
  • the mating contact 5 can be formed by one end of an upper connecting rail arranged parallel to the lower connecting rail 4.
  • FIG. 1 also schematically shows a drive device 6 known per se, which acts on the contact carrier 1 by means of a lever chain 7 and brings it into the on or off position.
  • a drive device 6 known per se, which acts on the contact carrier 1 by means of a lever chain 7 and brings it into the on or off position.
  • the modules mentioned form a low-voltage circuit breaker 22, as is indicated by a dash-dotted frame.
  • the contact force springs 8 of the individual contact levers 2 can be individual parts designed as leaf springs, but are part of a coherent, ie one-part leaf spring. As can be seen in more detail in FIGS. 1 and 3, the contact force springs 8 have an approximately centrally arranged bend 20 which, together with a sliding surface 19 formed on the contact carrier 1, forms a pivot bearing 10. The position of the pivot bearing 10 between the fulcrum 11 of the contact lever 2 and an upper end leg 14 of the contact force spring 8 is essential for the desired function of the switch contact arrangement 14 rests on the opposite end of the contact force spring 8 on the contact lever 2 approximately where the pivot point 11 is located.
  • This arrangement has the property that the contact force between the contacting end part 18 and the mating contact 5 is largely independent. is dependent on the relative position of the contact lever 2 to the contact carrier 1. Accordingly, the influence of the erosion of the interacting contact points on the size of the contact force is small.
  • the position of the upper angled end part 14 of the contact force spring 8 is essential given the dimensions and properties of the interacting parts.
  • a slide connector 9 attached to the contact carrier 2 is provided.
  • the pivot bearing 10 of the leaf spring arrangement 8 can move freely along the sliding surface 19 without a fixed connection to the contact carrier 1 and, depending on the tension of the contact force spring 8, is only limited by the sliding sleeve 9 serving as an abutment.
  • rocker-like contact force spring 8 shown is located in the space between the side of the contact lever 2 facing away from the contacts and the contact carrier 1 and is thereby protected against the effects of switching arcs.
  • FIGS. 4 to 7 differs in the features described below from those of the example shown in FIGS. 1 to 3. With regard to the remaining configuration, reference is made to the description of the embodiment according to FIGS. 1 to 3.
  • the slide 9 serves as a means for positioning the rocker-like contact force spring 8
  • the upper end leg 14 angled in the direction of the contact lever.
  • the contact levers 2 are provided with a recess 15, in which the end leg 14 engages.
  • the contact force springs 8 are aligned with the associated contact levers.
  • the desired contact force is achieved by installing the contact force springs 8 in the switching contact arrangement with a specific pretension.
  • FIGS. 5 and 7. 5 shows that the leaf spring 23 lies behind the contact levers.
  • the assembly is simple and can be carried out, for example, in such a way that the leaf spring 23 is pressed into the intermediate space after the contact carrier 1 and contact levers 2 have been joined until the angled end parts 14 snap into the recesses 25.
  • the contact force is increased to a desired value only shortly before the end position of the contact lever when switching on. To achieve this goal, as can be clearly seen in FIGS. 4 and 6, on the contact carrier 1 and on the contact lever 2
  • Projections 16 and 17 are provided, which are offset from one another and are arranged such that the spring force is increased towards the end of the switch-on movement. LIST OF REFERENCE NUMBERS

Landscapes

  • Contacts (AREA)
  • Tumbler Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un dispositif à contact de commutation utilisant comme ressort fournissant une force de contact (8) en vue d'avoir la force de contact requise pour un levier de contact (2), un ressort à lames à bascule, dont le palier pivotant (10) est disposé entre le centre de rotation (11) du levier de contact (2) sur un support de contact (1) et une partie terminale assurant le contact (18) du levier de contact (2). De préférence, ce palier pivotant (10) est formé par un coude du ressort de contact (8) et une surface coulissante (19) disposée sur le support de contact (1). Le palier pivotant (10) du ressort de contact (8) est déplaçable le long de la surface coulissante, sans liaison fixe avec le support de contact (2), en fonction de la tension dudit ressort de contact (8). Si le dispositif à contact de commutation présente plusieurs leviers de contact (dispositif multicontact), tous les ressort de contact associés peuvent être rassemblés de manière à former un ressort à lames en une seule pièce (23).
EP02708231A 2001-02-14 2002-02-07 Dispositif a contact de commutation Expired - Lifetime EP1360709B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108858 2001-02-14
DE10108858A DE10108858B4 (de) 2001-02-14 2001-02-14 Schaltkontaktanordnung
PCT/DE2002/000485 WO2002065494A1 (fr) 2001-02-14 2002-02-07 Dispositif a contact de commutation

Publications (2)

Publication Number Publication Date
EP1360709A1 true EP1360709A1 (fr) 2003-11-12
EP1360709B1 EP1360709B1 (fr) 2008-05-07

Family

ID=7675308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708231A Expired - Lifetime EP1360709B1 (fr) 2001-02-14 2002-02-07 Dispositif a contact de commutation

Country Status (7)

Country Link
US (1) US6879227B2 (fr)
EP (1) EP1360709B1 (fr)
JP (1) JP4173006B2 (fr)
CN (1) CN1288683C (fr)
DE (2) DE10108858B4 (fr)
HK (1) HK1060209A1 (fr)
WO (1) WO2002065494A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100817118B1 (ko) * 2006-10-17 2008-03-27 엘에스산전 주식회사 기중차단기의 가동접촉자
DE102006059466A1 (de) 2006-12-14 2008-06-19 Krütten, Viktor Elektrischer Schalter mit verdrehbar gelagertem Kontaktelement
WO2015042777A1 (fr) * 2013-09-24 2015-04-02 西门子公司 Bouton-poussoir en forme de cœur à blocage automatique
US9406470B2 (en) 2014-02-18 2016-08-02 General Electric Company Tri-stable flexure mechanism
CN107068466A (zh) * 2017-06-05 2017-08-18 泰豪科技股份有限公司 一种适用于大电流的三相快速切换装置
CN109411247A (zh) * 2017-08-18 2019-03-01 日立电梯（中国）有限公司 一种开关防回弹装置
CN114503231B (zh) * 2019-06-21 2024-08-09 康明斯发电Ip公司 扁平力通电感应开关

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646488A (en) * 1969-11-05 1972-02-29 Tokyo Shibaura Electric Co Electric circuit breaker
JPS63114018A (ja) * 1986-10-29 1988-05-18 富士電機株式会社 接触子装置
US5359161A (en) 1993-01-08 1994-10-25 Square D Company Non-linear spring for circuit interrupters
FR2703824B1 (fr) * 1993-04-07 1995-05-12 Merlin Gerin Disjoncteur limiteur multipolaire à répulsion électrodynamique.
US5517164A (en) * 1995-06-19 1996-05-14 Eaton Corporation Molded case circuit breaker having movable contact finger releasably locked to an operating mechanism
US5847629A (en) * 1997-04-03 1998-12-08 Eaton Corporation Circuit breaker contact spring subassembly and method and apparatus for making and circuit breaker incorporating same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02065494A1 *

Also Published As

Publication number Publication date
CN1484843A (zh) 2004-03-24
CN1288683C (zh) 2006-12-06
DE10108858A1 (de) 2002-09-05
DE50212223D1 (de) 2008-06-19
US20040066257A1 (en) 2004-04-08
JP4173006B2 (ja) 2008-10-29
US6879227B2 (en) 2005-04-12
DE10108858B4 (de) 2009-11-19
HK1060209A1 (en) 2004-07-30
WO2002065494A1 (fr) 2002-08-22
EP1360709B1 (fr) 2008-05-07
JP2004522260A (ja) 2004-07-22

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