EP1385183B1 - Dispositif de contact de commutation comportant un levier de contact et un conducteur flexible - Google Patents

Dispositif de contact de commutation comportant un levier de contact et un conducteur flexible Download PDF

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Publication number
EP1385183B1
EP1385183B1 EP20030090182 EP03090182A EP1385183B1 EP 1385183 B1 EP1385183 B1 EP 1385183B1 EP 20030090182 EP20030090182 EP 20030090182 EP 03090182 A EP03090182 A EP 03090182A EP 1385183 B1 EP1385183 B1 EP 1385183B1
Authority
EP
European Patent Office
Prior art keywords
contact
flexible conductor
contact lever
lever
receiving pocket
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
EP20030090182
Other languages
German (de)
English (en)
Other versions
EP1385183A1 (fr
Inventor
Detlev Schmidt
Günter Seidler
Ingo Thiede
Sezai TÜRKMEN
Artur Wajnberg
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 EP1385183A1 publication Critical patent/EP1385183A1/fr
Application granted granted Critical
Publication of EP1385183B1 publication Critical patent/EP1385183B1/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
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0263—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for positioning or holding parts during soldering or welding process
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H01H2001/5827—Laminated connections, i.e. the flexible conductor is composed of a plurality of thin flexible conducting layers

Definitions

  • the invention relates to a switch contact arrangement of an electrical switching device with a contact lever and at least one fixed to the contact lever by heat application flexible conductor, wherein at one end of the contact lever a receiving pocket for a solidified end portion of the flexible conductor is formed and the receiving pocket a bottom surface and three approximately at right angles having side surfaces standing to the bottom surface.
  • the receiving pocket has a rectangular bottom surface which is formed by the connection of two base plates of the contact lever, of which only one has a cutout.
  • the side surfaces of the receiving pocket formed by the cutout are perpendicular to each other and are chamfered near the mouth.
  • the arrangement according to said EP 0 467 798 B1 is intended for connection of the flexible conductor and the contact lever by welding without material supply.
  • an electric current of such magnitude is passed through the parts to be connected by means of electrodes placed under pressure, that they fuse together areally (resistance welding).
  • solder material is supplied in a known manner, for example in the form of a film or a thin sheet, which is inserted between the parts to be joined before the heating takes place.
  • the quality of the connection of contact levers and flexible conductors is to be improved.
  • this object is achieved in that the bottom surface has an approximately trapezoidal expanded and the end portion of the bottom surface adapted shape and the side surfaces of the receiving pocket are at an obtuse angle to the bottom surface.
  • Another advantageous feature is an increase in the lateral resistance moment of the combination of contact lever and flexible conductor. As a result, the resistance of the contact lever and the flexible conductor joint increases against the strong forces that occur when switching devices are subjected to a short-circuit current.
  • the invention proves to be advantageous in automated manufacturing processes in which the alignment and centering of the flexible conductor relative to the contact lever is facilitated by the trapezoidal design.
  • the invention is achieved as a result that the current transfer between the contact lever and the flexible conductor takes place as if the conductor embedded in the material of the contact lever or integral with this. This makes the contact resistance and the power dissipation particularly low.
  • FIG. 1 shows a schematic representation of a low-voltage circuit breaker in section.
  • FIG. 2 shows a contact carrier of the low-voltage circuit breaker shown in FIG. 1 with a plurality of contact levers and adjacent parts.
  • FIG. 3 shows a single contact lever and a flexible conductor to be connected thereto.
  • FIG. 4 shows the contact lever and the flexible conductor according to FIG. 3 in the connected state.
  • FIG. 5 shows an end view of a contact lever according to the invention with a receiving pocket.
  • the low-voltage circuit breaker 1 shown schematically in FIG. 1 has a housing 2 in which a plurality of switching poles are arranged parallel to one another. Each of the switching poles comprises a switching contact arrangement 3 with associated arc quenching chamber 4. Each of the switching contact assemblies 3 has a fixed switching contact 5 and a movable switching contact 6, which comprises a plurality of contact lever 7 or 7k and a pivotally mounted Kotaktong 8 in the housing 2. The contact lever 7 and 7k are pivotally mounted relative to the contact carrier 8, wherein the longer contact lever 7 main and VorITAe and the shorter contact lever 7k have only main contacts.
  • Flexible conductors 9 connect the contact levers 7 and 7k, respectively, to a lower stationary conductor 10 which, together with an upper stationary conductor 11, allows the connection of the circuit breaker 1 to a load circuit.
  • a likewise housed in the housing 2 drive device 12 is used to actuate the movable switching contacts 6 by means of a lever linkage thirteenth
  • a movable switching contact 6 with its contact levers 7, 7k and its contact carrier 8 is illustrated in more detail in FIG.
  • the number of contact levers 7, 7k shown is only to be understood as an example because, depending on the design of the circuit breaker 1, a smaller or larger number of such contact levers may be required.
  • the number of contact levers and associated flexible conductors in a multi-pole circuit breaker is considerable. Since each of the joints of a flexible conductor 9 with a contact lever 7 and 7k may be subject to an electrical contact resistance, thus a high quality of the connection points is desired to the electrical power loss and thus the heating of the circuit breaker keep low. At the same time, it is important to be able to produce the compounds quickly and with consistent quality.
  • FIG. 3 illustrates a single contact lever 7 and a flexible conductor 9 to be fixedly connected thereto.
  • the contact lever 7 is made of copper sheet in a known manner and has a bearing opening 14 for receiving a bearing bolt which is located in lateral cheeks of the contact carrier 8 (FIGS 2) is included.
  • pin 15 At its rear side opposite the contact points of the contact lever 7 has in a known manner pin 15 for engaging in helical compression springs which are supported in the contact carrier 8 and which provide in the on state of the circuit breaker 1 for an adequate contact force between the contact levers 7 and the stationary switching contact.
  • each contact lever 7 is provided with a receiving pocket 16 for a solidified end portion 17 of the flexible conductor 9.
  • the flexible conductor 9 has three parallel flexible conductor cables 18, which in a known manner also consist of fine-stranded flexible copper strand. At the ends, the three conductor cables 18 are solidified by applying a high pressure to a practically compact body which forms the mentioned end portion.
  • the receiving pocket 16 is like the end portion 17 trapezoidally connected in such a way that when inserting the end portion 17 in the receiving pocket 16 in the direction of the arrow 20 shown in Figure 3 not only a surface contact with the bottom surface 21, but also a three-sided Touch on the side surfaces 22, 23 and 24 of the receiving pocket 16 takes place.
  • the trapezoidal shape of the receiving pocket 16 and the end portion 17 lead not only to a planar connection in the area of the bottom surface 21, but also on the side surfaces 22, 23 and 24. This ensures a good power transfer between the contact levers 7 and the flexible conductor 9 and at the same time significantly increased mechanical strength.
  • Units according to the figure 4, which consist of contact levers 7 and flexible conductors 9, therefore, are particularly suitable for circuit breakers with high switching capacity.
  • FIG. 5 While in the embodiment according to Figures 3 and 4, a rectangular position of the side walls 22, 23 and 24 is provided to the bottom surface 21 and consequently the corresponding side surfaces of the end portion 17 are also perpendicular to each other, according to the embodiment of the invention shown in Figure 5 a as it were double trapezoidal shape of a receiving pocket 25 provided with a correspondingly adapted shape of an end portion, not shown, of a flexible conductor.
  • the receiving pocket 25 has a trapezoidal bottom surface 26 and side surfaces 27, 28 and 29 corresponding to the receiving pocket 16 (FIG. 3). These are at an obtuse angle to the bottom surface 26.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Breakers (AREA)

Claims (1)

  1. Agencement de contact de commutation (3) d'un appareil de commutation électrique, comprenant un levier de contact (7, 7k) et au moins un conducteur (9) flexible relié de manière fixe au levier de contact (7, 7k) par utilisation de chaleur, une cavité de réception (25) d'un tronçon d'extrémité (17) rigidifié du conducteur (9) flexible étant formée à une extrémité du levier de contact (7, 7k), et la cavité de réception (25) présentant une surface de fond (26) et trois surfaces latérales (27, 28, 29) en position angulaire par rapport à la surface de fond (26), caractérisé en ce que la surface de fond (26) présente une configuration s'élargissant en forme de trapèze, et le tronçon d'extrémité (17) une configuration adaptée à la surface de fond (26), et en ce que les surfaces latérales (27, 28, 29) de la cavité de réception (25) font un angle obtus avec la surface de fond (26).
EP20030090182 2002-07-25 2003-06-17 Dispositif de contact de commutation comportant un levier de contact et un conducteur flexible Expired - Lifetime EP1385183B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20211681U 2002-07-25
DE20211681U DE20211681U1 (de) 2002-07-25 2002-07-25 Schaltkontaktanordnung mit einem Kontakthebel und einem biegsamen Leiter

Publications (2)

Publication Number Publication Date
EP1385183A1 EP1385183A1 (fr) 2004-01-28
EP1385183B1 true EP1385183B1 (fr) 2006-08-23

Family

ID=29723999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030090182 Expired - Lifetime EP1385183B1 (fr) 2002-07-25 2003-06-17 Dispositif de contact de commutation comportant un levier de contact et un conducteur flexible

Country Status (2)

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EP (1) EP1385183B1 (fr)
DE (2) DE20211681U1 (fr)

Families Citing this family (2)

* 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
US10497528B2 (en) 2017-06-01 2019-12-03 Siemens Aktiengesellschaft Multi-finger electrical contact assemblies , circuit breakers, and methods having increased current withstand capabilities

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665026B1 (fr) * 1990-07-19 1992-09-18 Merlin Gerin Procede de connexion par soudage d'un conducteur flexible a un doigt de contact, et structure de contact electrique a plusieurs lamelles.
DE19930812A1 (de) * 1999-06-30 2001-01-04 Siemens Ag Lötverbindung von flexiblen Leiterseilen mit Anschlußschienen von Niederspannungs-Leistungsschaltern

Also Published As

Publication number Publication date
DE50304715D1 (de) 2006-10-05
EP1385183A1 (fr) 2004-01-28
DE20211681U1 (de) 2003-12-04

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