EP1360709B1 - Schaltkontaktanordnung - Google Patents

Schaltkontaktanordnung Download PDF

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Publication number
EP1360709B1
EP1360709B1 EP02708231A EP02708231A EP1360709B1 EP 1360709 B1 EP1360709 B1 EP 1360709B1 EP 02708231 A EP02708231 A EP 02708231A EP 02708231 A EP02708231 A EP 02708231A EP 1360709 B1 EP1360709 B1 EP 1360709B1
Authority
EP
European Patent Office
Prior art keywords
contact
spring
switching
lever
force spring
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
EP02708231A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1360709A1 (de
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/de
Application granted granted Critical
Publication of EP1360709B1 publication Critical patent/EP1360709B1/de
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
    • 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 comprising a contact carrier and a contact lever pivotable about a pivot point on the contact carrier and a leaf spring designed as a contact force spring for pressing the contact lever to a mating contact.
  • a switch contact arrangement of this type has become known as part of a low-voltage circuit breaker by US Patent 5,517,164.
  • the force acting on the switching contacts of circuit breakers contact force is applied by the fact that the mentioned contact force springs are tensioned during switching. This is done by a belonging to the circuit breaker drive device whose switching path over the intended life of the circuit breaker is substantially constant. In contrast, increases by burning the switch contacts the way the contact lever, whereby the contact force decreases according to the burnup. If it is to be ensured that a sufficient contact force is achieved even towards the end of the service life of a switching contact arrangement, a suitable dimensioning of the contact force springs can lead to an undesirably high contact force in the new state of the switching contact arrangement. This results in a correspondingly high energy requirement of the drive device.
  • the present invention has for its object to provide a circuit breaker in which the contact force is less dependent on the burning of the contacts.
  • this object is achieved in a switch contact arrangement of the type mentioned in that the contact force spring is pivotally arranged like a rocker, such that the ends of the contact force spring abut the contact lever and a pivot bearing of the contact force spring between the pivot point of the contact lever and its contact-forming end portion is arranged ,
  • the contact force of the switching contact arrangement according to the invention does not follow the known characteristics of a helical compression spring or a one-armed leaf spring according to the above US 5,517,164 , Rather, the dependence on the contact erosion is largely reduced and can be largely eliminated by optimized design of the geometry.
  • the determination of the contact force is essentially by a suitable choice of bias. This eliminates the need for oversizing the contact force spring and the drive device, which affects the life of the circuit breaker low.
  • the pivot bearing of the contact force spring without fixed connection with the contact carrier in response to the respective spring force along a sliding surface located on the contact carrier is movable. Due to the non-stationary storage, the bearing point of the leaf spring assembly changes depending on the position of the contact lever.
  • the pivot bearing of the contact force spring is formed by a voltage applied to the substantially flat sliding surface on the contact carrier kink of the contact force spring.
  • the inventive design of a switching contact arrangement is particularly suitable for circuit breakers with high rated current, which have several 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 switching contact arrangement with a plurality of contact levers partially in a section II-II in FIG. 2 ,
  • FIG. 2 shows the switch contact arrangement according to the FIG. 1 overlooking the parallel contact lever.
  • FIG. 3 is a detail shown on an enlarged scale of the switch contact arrangement according to the Figures 1 and 2 ,
  • FIGS. 4, 5 and 6 show a further embodiment in illustrations showing the FIGS. 1, 2 and 3 correspond.
  • FIG. 7 shows a leaf spring having contact force springs for a plurality of contact lever in a perspective view.
  • the in the FIGS. 1, 2 and 3 illustrated switching contact arrangement comprises a contact carrier 1 which is mounted in a pivot bearing, not shown, by means of bearing journals 12.
  • Contact lever 2 are pivotally connected to the contact carrier 1 about a pivot point 11.
  • the contact lever 2 have a contact-making end portion 18 and are connected at the opposite end by merely indicated flexible conductor 13 electrically conductive with a lower connecting rail 4.
  • rocker-like contact force springs 8 are for ensure that the contact-making end parts 18 of the contact lever 2 in the switched-on state of the switching contact arrangement abut with sufficient contact force against a mating contact 5 which carries an arcing horn 3.
  • the mating contact 5 may be formed by one end of an upper connecting rail arranged parallel to the lower connecting rail 4.
  • FIG. 1 is also shown schematically a known drive device 6, which acts by means of a lever chain 7 on the contact carrier 1 and brings this in the on or off position. Together with protective and control devices not shown, said assemblies form a low-voltage circuit breaker 22, as indicated by a dot-dashed frame.
  • the contact force springs 8 of the individual contact lever 2 may be individual, designed as a leaf spring parts, but are part of a contiguous, ie one-piece leaf spring. How closer the FIGS. 1 and 3 can be seen, the contact force springs 8 have an approximately centrally disposed bend 20, which forms a pivot bearing 10 together with a formed on the contact carrier 1 sliding surface 19. Essential to the desired function of the switching contact arrangement is the position of the pivot bearing 10 between the pivot point 11 of the contact lever 2 and an upper end leg 14 of the contact force spring 8. This end leg 14 is located on the contact-making end portion 18 of the contact lever 2, while an approximately equally shaped end leg 14 on opposite end of the contact force spring 8 abuts on the contact lever 2 approximately where the pivot point 11 is located.
  • This arrangement has the property that the contact force between the contact-making end portion 18 and the mating contact 5 is largely independent from the relative position of the contact lever 2 to the contact carrier 1 is. Accordingly, the influence of the burnup of the co-operating pads on the magnitude of the contact force is small.
  • the position of the upper angled end portion 14 of the contact force spring 8 is essential given dimensions and properties of the cooperating parts.
  • a mounted on the contact carrier 2 Gleitbutzen 9 is provided.
  • the pivot bearing 10 of the leaf spring assembly 8 is freely movable without firm connection with the contact carrier 1 along the sliding surface 19 and depending on the voltage of the contact force spring 8 only limited by serving as an abutment Gleitbutzen. 9
  • rocker-like contact force spring 8 is located in the space between the substituted rocker-like contact force spring 8 and is thereby protected against the effects of switching arcs.
  • FIGS. 4 to 7 shown further embodiment of a switching contact arrangement with a plurality of contact levers 2 (multi-contact system) differs in the features described below from those of the in the FIGS. 1 to 3 from the example shown. With regard to the remaining embodiment is based on the description of the embodiment of the FIGS. 1 to 3 directed.
  • the Gleitbutzen 9 serves as a means for positioning the rocker-like contact force spring 8 is in the in the FIGS. 4 to 7 illustrated second embodiment of the invention, the upper end leg 14 angled in the direction of the contact lever.
  • the contact lever 2 are provided with a recess 15, in which the end leg 14 engages.
  • the contact force springs 8 are aligned with respect to the associated contact levers.
  • the desired contact force is achieved by the installation of the contact force springs 8 in the switch contact arrangement with a certain bias.
  • FIGS. 5 and 7 The formation of several contact force springs 8 as a one-piece leaf spring 23 is closer from the FIGS. 5 and 7 seen. It leaves the FIG. 5 recognize that the leaf spring 23 is behind the contact levers.
  • the assembly is simple and can for example be such that the leaf spring 23 is pressed into the gap after the assembly of contact carrier 1 and contact levers 2 until the angled end portions 14 engage in the recesses 25.
  • the contact force is increased to a desired value shortly before the end position of the contact lever when switching.
  • the contact carrier 1 and the contact lever 2 projections 16 and 17, which are offset from each other and are arranged such that the spring force is increased towards the end of the switch-on.

Landscapes

  • Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Tumbler Switches (AREA)
  • Breakers (AREA)
EP02708231A 2001-02-14 2002-02-07 Schaltkontaktanordnung Expired - Lifetime EP1360709B1 (de)

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 (de) 2001-02-14 2002-02-07 Schaltkontaktanordnung

Publications (2)

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

Family

ID=7675308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708231A Expired - Lifetime EP1360709B1 (de) 2001-02-14 2002-02-07 Schaltkontaktanordnung

Country Status (7)

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

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
US9934914B2 (en) 2013-09-24 2018-04-03 Siemens Aktiengesellschaft Heart-shaped self-locking button
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
WO2020257470A1 (en) * 2019-06-21 2020-12-24 Cummins Power Generation Ip, Inc. Flat force blow-on switch

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

Also Published As

Publication number Publication date
DE10108858A1 (de) 2002-09-05
CN1288683C (zh) 2006-12-06
JP4173006B2 (ja) 2008-10-29
US6879227B2 (en) 2005-04-12
HK1060209A1 (en) 2004-07-30
WO2002065494A1 (de) 2002-08-22
DE10108858B4 (de) 2009-11-19
CN1484843A (zh) 2004-03-24
DE50212223D1 (de) 2008-06-19
US20040066257A1 (en) 2004-04-08
JP2004522260A (ja) 2004-07-22
EP1360709A1 (de) 2003-11-12

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