EP1374264B1 - Ensemble contact de commutation pour un commutateur electrique - Google Patents

Ensemble contact de commutation pour un commutateur electrique Download PDF

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Publication number
EP1374264B1
EP1374264B1 EP02732377A EP02732377A EP1374264B1 EP 1374264 B1 EP1374264 B1 EP 1374264B1 EP 02732377 A EP02732377 A EP 02732377A EP 02732377 A EP02732377 A EP 02732377A EP 1374264 B1 EP1374264 B1 EP 1374264B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact arrangement
switching contact
switching
contact carrier
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
EP02732377A
Other languages
German (de)
English (en)
Other versions
EP1374264A1 (fr
Inventor
Marc Liebetruth
Sezai Tuerkmen
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
Priority claimed from DE10117844A external-priority patent/DE10117844A1/de
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1374264A1 publication Critical patent/EP1374264A1/fr
Application granted granted Critical
Publication of EP1374264B1 publication Critical patent/EP1374264B1/fr
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
    • 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 invention is in the field of electrical switches and is applicable to the structural design of a rigid member which serves as a contact carrier of a contact.
  • the contact carrier for radially supporting the bearing pin has at least three support elements (E 0 222 686 B1).
  • the contact carrier in this case comprises a metal frame, which consists of two side walls and a plurality of connecting the side walls bolt. This metal frame is articulated via a coupling pin to an insulating coupling element, which serves for coupling the contact carrier to a switch drive. Two of the support elements which are associated with the ends of the bearing pin are formed by the side walls of the metal frame.
  • this contact carrier In order to avoid unwanted radial deflection of the bearing pin of the contact lever with the least possible effort on additional material, form in this contact carrier two intermediate adjacent contact levers in the axially central region of the bearing pin intermediate bearing additional support elements by being hinged to the coupling pin. In this case, passage openings of the contact carrier are required to carry out the intermediate storage to the coupling pin. Such in addition to the two outer support elements in the contact carrier integrated support elements must be positioned due to their pivoting about the coupling pin for mounting the bearing pin.
  • the invention Based on an electrical switch with the features of the preamble of claim 1 (E 0 222 686 B1), the invention has for its object to simplify the manufacture and assembly of the contact carrier.
  • this object is achieved in that at least three of the support elements are formed as part of a contact carrier forming, integrally manufactured molding.
  • a contact carrier forming, integrally manufactured molding In the context of the invention is intended to be understood by a one-piece molded part, a part in which several functional elements in the course of a primary molding process - such as a press, injection compression, casting, injection molding, die casting or sintering process - to a single, in Assembly-technical sense inseparably joined component are connected.
  • the three support elements are rigidly integrated in a predetermined position as part of the contact carrier in this.
  • the three support elements are already aligned in the manufacture of the contact carrier on the axis of the bearing bolt, so that virtually no tolerance variations caused by tilting of the bearing pin occur during operation of the switch.
  • Such supported bearing pin is subject to low maximum deflection even at high short circuit or surge currents and thus has a high short-circuit and surge current capability.
  • the new switch contact arrangement can be a large number each with a single tolerance deviation of a given nominal size afflicted contact lever and possibly also with a single tolerance deviation of their nominal size afflicted intermediate storage - which, however, part of Can be contact lever - have, since the number of contact levers is divided into subsets, each of which is axially limited between two adjacent support elements. Due to this axial limitation of the subsets of the contact lever is an axial displacement of the contact lever of a subset - due to acting between them current forces - limited to the limited by the respective support members axial portion of the bearing pin, wherein the maximum value of the displacement is not greater than the sum of all individual tolerance deviations the contact lever and possibly existing intermediate storage of this subset is.
  • one forms the molding at least partially as a plastic molding then can be dispensed with an electrically insulating design of the coupling bolt.
  • the mechanical strength of such a plastic molded part can be increased, that at least one reinforcing element is at least partially embedded in the plastic molding.
  • a fiber-reinforced thermosetting plastic is used for the plastic molding and for the reinforcing element, for example, a non-magnetic steel.
  • the plastic molding other pure or, for example, by ceramic or glass fibers reinforced plastics and the reinforcing element other metals or metal sheets used.
  • a preferred embodiment of the new switch contact arrangement provides that at least one of the support elements has an at least partially embedded in the plastic molding metal part.
  • Such a metal part may be part of the reinforcing element, whereby at the same time the mechanical strength of the support element forming part of the contact carrier is increased.
  • a further advantageous embodiment of the new switch contact arrangement provides that the metal parts containing support elements are spaced in the axial direction of the bearing pin of the coupling element when the coupling of the contact carrier is made to a rotatable by means of a switch drive shaft via a metallic coupling element.
  • a receptacle for the shielding body is provided in at least one of the support elements provided with a shielding body, the shielding body can be additionally supported against the gas pressure occurring during switching.
  • lateral fastening legs resting against the contact carrier can be dimensioned smaller or possibly omitted due to the reduced load.
  • the electrical switch for voltage ranges up to about 1000 V shown in FIG. 1 and used in low-voltage networks has a switching pole housing 1 in which switching chambers 2 are formed next to one another depending on the number of poles required.
  • a rotatable by means of a switch drive 3 switching shaft 4 is used for common actuation of switching contact assemblies, each consisting of a fixed contact assembly 5 and a movable contact assembly 6.
  • switching contact assemblies 5, 6 are connected to externally accessible connection rails 9, 10.
  • Two embodiments 6a and 6b of the movable contact assembly 6 are explained below with reference to Figures 2 and 3 and 4 to 9.
  • a contact carrier 11 belonging to the movable contact assembly 6a has a molded plastic part 12, which has been formed integrally in the course of a pressing process by embedding a reinforcing element shown in FIG.
  • the contact carrier is pivotably mounted in the housing 1 (cf., FIG. 1) and via the selector shaft 4 by means of the switch drive 3 - of which only in FIG a propulsion train 15 supported on a spring accumulator 14 is shown - in a closed position and in an open position relative to the stationary contact assembly 5.
  • a plurality of contact levers 16, 17 arranged parallel to one another are pivotable about a bearing pin 18 relative to the contact carrier 11 on the contact carrier 11, with contact force springs 19 (see FIG.
  • the number of attached to the contact carrier 11 contact lever 16, 17 depends on the amount of current that the circuit breaker should run during operation. As can be seen from FIG. 2, of the total 22 contact levers present, 8 contact levers 16 are shorter and have only one main contact region 21, but no precontact region 22 and no arcing horn 23 like the remaining contact levers 17.
  • the relatively large width of the switch contact arrangement entails that the section of the bearing bolt extending between the two lateral support elements 24a, 24b is subjected to a relatively strong bending stress, when in the closed state of the switch contact arrangement, in addition to the forces of the contact force springs 19, further forces are caused by a high current how to add short circuit or surge current.
  • This third support element is formed by a provided with a receiving opening 25c (not visible in the figure) for the bearing pin 18, directed transversely to the bearing pin rib 28 of the contact carrier, wherein in the rib 28 in the plastic molding 12 completely embedded metal part 29c extends with a through hole 27c for the position bolts, which is part of the reinforcing element 13 (see Figure 3).
  • FIG. 1 Of the second embodiment 6b of the movable contact group, only a second embodiment 30 of the contact carrier is shown in FIG.
  • this contact carrier 30 serve as a metal sheet 31 formed support elements for radial support of the portion of the bearing pin which extends between two lateral cheeks 32a, 32b formed support elements.
  • the two central support elements 31 are embedded with a first portion 33 in the plastic molding 34 of the contact carrier 30 and protrude with a second portion 35 of the plastic molding out.
  • the metal sheets 31 in the first subregion 33 embedded in the plastic molded part have undercuts 36 which serve to securely anchor the respective metal sheet in the plastic molded part, even under high bending load of the bearing bolt.
  • the second portion 35 which is provided with a bore 38 for the passage of the bearing pin 37, additionally has a recess 39 which serves to receive a shielding body 40 shown in more detail in Figure 9.
  • two reinforcing elements 41, 42 are embedded, one of which is shown in Figure 6.
  • tongues 43 are formed on the shielding body 40, which protects the pivoting region of the contact carrier 30 and further switch parts, which are arranged below the contact regions 21, 22 (see FIG. 1) and not shown, from falling burn-off products and condensing switching gases, into the recesses 39 engage, which are provided on the metal sheets (see also Figure 5).
  • the shielding body 40 is supported against the gas pressure occurring during switching operations in such a way that his laterally held on the contact carrier mounting legs 44a, 44b are less stressed.

Landscapes

  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Contacts (AREA)

Claims (7)

  1. Agencement de contact de commutation pour un commutateur électrique, ayant un porte-contact (11 ; 30) sur lequel plusieurs leviers (16, 17) de contact sont maintenus basculant au moyen d'un axe (18 ; 37) de palier,
    dans lequel le porte-contact (11 ; 30) a au moins trois éléments d'appui pour l'appui radial de l'axe (18 ; 37) de palier,
    caractérisé
    en ce qu'au moins des éléments (24a, 24b, 28 ; 32a, 32b, 31) d'appui sont constitués sous la forme d'une partie d'une pièce moulée fabriquée d'un seul tenant et formant le porte-contact.
  2. Agencement de contact de commutation suivant la revendication 1,
    caractérisé
    en ce que la pièce moulée est constituée au moins en partie sous la forme d'une pièce moulée (12 ; 34) en matière plastique.
  3. Agencement de contact de commutation suivant la revendication 2,
    caractérisé
    en ce que, dans la pièce moulée (12 ; 34) en matière plastique, est incorporé au moins partiellement un élément (13 ; 41, 42) métallique de renfort.
  4. Agencement de contact de commutation suivant l'une des revendications 2 ou 3,
    caractérisé
    en ce qu'au moins l'un des éléments d'appui a une partie métallique (29a, 29b, 29c ; 31) incorporée au moins en partie dans la pièce moulée (12 ; 34) en matière plastique.
  5. Agencement de contact de commutation suivant la revendication 4,
    caractérisé
    en ce que la partie (31) métallique est constituée sous la forme d'une tôle métallique qui est incorporée dans la pièce moulée (34) en matière plastique par une première zone (33) partielle ayant des contre-dépouilles (36) et fait saillie de la pièce moulée (34) en matière plastique par une deuxième zone (35) partielle munie d'un alésage (38) pour l'axe (37) de palier.
  6. Agencement de contact de commutation suivant l'une des revendications 4 ou 5,
    caractérisé
    en ce que, lors du couplage du porte-contact (30) sur un arbre (40) de commande au moyen d'un élément (8) métallique de couplage, les éléments d'appui comportant une pièce (31) métallique sont, dans la direction axiale de l'axe (37) de palier, à distance de l'élément (8) de couplage.
  7. Agencement de contact de commutation suivant l'une des revendications 2 à 6,
    caractérisé
    en ce que, pour un porte-contact (30) équipé d'un corps (40) de blindage, il est prévu sur au moins l'un des éléments d'appui un logement (39) pour le corps (40) de blindage.
EP02732377A 2001-04-04 2002-03-28 Ensemble contact de commutation pour un commutateur electrique Expired - Lifetime EP1374264B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10117844 2001-04-04
DE10117844A DE10117844A1 (de) 2001-04-04 2001-04-04 Schaltungsanordnung für Niederspannungs-Leistungsschalter
DE20118493U DE20118493U1 (de) 2001-04-04 2001-11-07 Schaltkontaktanordnung für einen elektrischen Schalter
DE20118493U 2001-11-07
PCT/DE2002/001250 WO2002082481A1 (fr) 2001-04-04 2002-03-28 Ensemble contact de commutation pour un commutateur electrique

Publications (2)

Publication Number Publication Date
EP1374264A1 EP1374264A1 (fr) 2004-01-02
EP1374264B1 true EP1374264B1 (fr) 2007-06-20

Family

ID=26009053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732377A Expired - Lifetime EP1374264B1 (fr) 2001-04-04 2002-03-28 Ensemble contact de commutation pour un commutateur electrique

Country Status (7)

Country Link
US (1) US7068131B2 (fr)
EP (1) EP1374264B1 (fr)
JP (1) JP4224301B2 (fr)
CN (1) CN1288684C (fr)
DE (1) DE50210351D1 (fr)
HK (1) HK1061305A1 (fr)
WO (1) WO2002082481A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004048836A1 (de) * 2004-09-30 2006-04-06 Siemens Ag Schaltkontaktanordnung für einen elektrischen Schalter und elektrischer Schalter mit einer Schaltkontaktanordnung
CN100514525C (zh) * 2007-08-08 2009-07-15 常熟开关制造有限公司(原常熟开关厂） 断路器的动触头
US7935902B2 (en) * 2008-04-15 2011-05-03 General Electric Company Contact assembly of circuit breaker
US20110309052A1 (en) * 2010-06-16 2011-12-22 Eaton Corporation Moving seal with arc creepage surface for an air circuit breaker
US9293282B2 (en) 2010-06-16 2016-03-22 Eaton Corporation Moving seal with arc creepage surface for an air circuit breaker
DE102017214970A1 (de) * 2017-08-28 2019-02-28 Siemens Aktiengesellschaft Schalteinrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3539788A1 (de) * 1985-11-07 1987-05-14 Siemens Ag Kontaktanordnung mit kontakthebel voneinander trennenden zwischenlagen
US4996507A (en) * 1988-08-01 1991-02-26 Westinghouse Electric Corp. CT quick change assembly and force transmitting spacer
US5057806A (en) 1988-08-01 1991-10-15 Westinghouse Electric Corp. Crossbar assembly
US4866225A (en) 1988-09-08 1989-09-12 Siemens Energy & Automation, Inc. Insulated light weight metallic crossbar in polyphase circuit breaker assemblies for inhibiting arcing
US5534835A (en) * 1995-03-30 1996-07-09 Siemens Energy & Automation, Inc. Circuit breaker with molded cam surfaces
US6005206A (en) * 1998-05-07 1999-12-21 Eaton Corporation Electrical switching apparatus with improved contact arm carrier arrangement
DE29923674U1 (de) 1999-09-30 2001-01-18 Siemens AG, 80333 München Bewegbarer Kontaktträger zur Aufnahme von Kontakthebeln für Niederspannungs-Leistungsschalter
DE20100490U1 (de) 2001-01-05 2001-03-29 Siemens AG, 80333 München Bewegbarer Kontaktträger zur Aufnahme von Kontakthebeln für Niederspannungs-Leistungsschalter
US6376788B1 (en) * 2001-01-08 2002-04-23 Eaton Corporation Magnetically collapsible toggle linkage for electrical switching apparatus

Also Published As

Publication number Publication date
CN1496572A (zh) 2004-05-12
WO2002082481A1 (fr) 2002-10-17
HK1061305A1 (en) 2004-09-10
DE50210351D1 (de) 2007-08-02
JP2004523873A (ja) 2004-08-05
US7068131B2 (en) 2006-06-27
EP1374264A1 (fr) 2004-01-02
US20050035835A1 (en) 2005-02-17
JP4224301B2 (ja) 2009-02-12
CN1288684C (zh) 2006-12-06

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