EP1202303B1 - Dispositif de contact de commutation pour disjoncteur basse tension - Google Patents

Dispositif de contact de commutation pour disjoncteur basse tension Download PDF

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Publication number
EP1202303B1
EP1202303B1 EP20010250326 EP01250326A EP1202303B1 EP 1202303 B1 EP1202303 B1 EP 1202303B1 EP 20010250326 EP20010250326 EP 20010250326 EP 01250326 A EP01250326 A EP 01250326A EP 1202303 B1 EP1202303 B1 EP 1202303B1
Authority
EP
European Patent Office
Prior art keywords
contact
levers
forces
arrangement according
different
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
EP20010250326
Other languages
German (de)
English (en)
Other versions
EP1202303A2 (fr
EP1202303A3 (fr
Inventor
Michael Hahn
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
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1202303A2 publication Critical patent/EP1202303A2/fr
Publication of EP1202303A3 publication Critical patent/EP1202303A3/fr
Application granted granted Critical
Publication of EP1202303B1 publication Critical patent/EP1202303B1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position

Definitions

  • the invention relates to a switch contact arrangement for low-voltage circuit breaker acted upon by springs of different spring force contact levers.
  • DE-PS 926 798 In order to avoid contact bounce in low-voltage circuit breakers, it is proposed in DE-PS 926 798 to design the contact arrangement in the form of a multiplicity of mutually parallel individual contacts which have mutually different bouncing properties. This should be achieved primarily by divergent bounce properties of the bounce contacts. Among other measures, it is proposed to interpret the switch-on forces acting on the individual contacts differently from each other. Whether this should be achieved by means of different contact force springs, is not recognizable.
  • DE-OS 3544668 describes a multi-membered pressure contact arrangement for circuit breakers, the contact members are acted upon by springs for generating the contact force. The springs are designed differently strong, with only a portion of the springs has a suitable for the prevention of bounce strength. It is proposed to arrange the stronger and the weaker springs symmetrically to a plane of symmetry of the contact arrangement.
  • Both descriptions of the invention are directed to the avoidance of contact bounce and not to the compensation of contact-removing electrodynamic forces. They can therefore also contain no teaching for avoiding this phenomenon, for example for a specific distribution of the compensating measures over the range of the width of a contact carrier.
  • the use of springs of different strengths for the contacts serves only to avoid bouncing and to produce different bouncing properties, regardless of their spatial distribution.
  • the present invention seeks to provide a switch contact arrangement for low-voltage circuit breaker, in which the effects of electrodynamic forces on the contact arrangements of adjacent current paths and the contact-lifting forces caused by them are avoided.
  • This object is achieved according to the present invention in that in a switching contact arrangement for low-voltage circuit breaker acted upon by springs of different spring force contact levers, which in a multi-contact system outside arranged contact lever with clearly higher contact forces are applied, as the inside arranged.
  • the contact forces of the internally arranged contact levers to the externally arranged contact levers can be continuously increased in a finely graduated manner.
  • the contact forces can also be increased from the inside arranged contact levers to the outside arranged contact levers in two or more stages, or in only one stage.
  • the gradation of the contact forces on the contact carrier is provided symmetrically to the central axis, that is, the increase in the contact force is provided on both sides from the inside to the outside in the same size.
  • the contact-lifting forces on the two sides of the contact carrier but can be different sizes. Therefore, it may be appropriate to perform the gradation of the contact forces on the contact carrier unbalanced to the center axis, that is, the increase in the contact force is provided differently on the two sides from the inside to the outside.
  • the regulation of the different contact forces for the individual contact levers can preferably be effected by differently strong contact force springs or contact spring combinations. However, it can also be effected by different shaping of the contact carrier, in particular the receptacles for the individual contact force springs in the contact carrier, for example by a longer or shorter receptacle for the contact force spring in the contact carrier, whereby a weaker or stronger bias of the contact force spring is achieved.
  • the regulation of the different contact forces for the individual contact levers can be achieved by different shaping of the contact lever itself, for example, by providing the contact levers with differently far-extending lugs for the contact force springs, or by having different depths in their direction of movement at the point of application of the contact force springs ,
  • Fig. 1 shows schematically a part of a contact carrier with eleven contact levers in plan view.
  • FIG. 2 shows schematically the expected current distribution in a contact carrier according to the Fig.1.
  • FIG. 3 shows schematically the expected size of the contact-lifting forces in a contact carrier according to FIG. 1.
  • FIG. 4 shows schematically, illustrated as a bar chart, an example of a first possibility of contact force assignment in a contact carrier according to FIG. 1.
  • FIG. 5 shows schematically, illustrated as a bar chart, an example of a further possibility of contact force assignment in a contact carrier according to FIG. 1.
  • Fig. 1 shows schematically a part of a contact carrier 1 with eleven contact levers 2 in plan view.
  • Such contact systems With multiple contacts are so far carried out that all contact lever 2 are acted upon by contact force springs, not shown, whose contact force in the context of manufacturing accuracy has the same size. In alternating and / or three-phase systems, however, uneven current distributions occur in the individual contact levers 2 arranged in parallel.
  • Fig. 2 shows schematically, in the form of a diagram, for example, an expected current distribution in a contact carrier 1 according to the Fig.1.
  • the curve 3 for the expected current distribution can be seen that in the outer contact levers 2, a higher current load occurs, as in the center of the contact carrier 1 arranged contact levers 2. This has the consequence that the contact-lifting forces act more on the outer contact lever.
  • the expected size of these contact-lifting forces in a contact carrier 1 according to the Fig.1 is shown schematically in Figure 3, in the form of a diagram.
  • the curve 4 for the expected contact-lifting forces can be seen that in the outer contact levers 2 larger contact-lifting forces act as in the center of the contact carrier 1 arranged contact levers 2 and that follows the increase in the forces from the center of the contact carrier 1 to the outside in about the function i 2 .
  • the rising areas 5 and 6 of the curve 4 for the size of the contact-lifting forces in three-phase systems can be different, as indicated in the graph.
  • the magnitude of the contact force for the contact lever 2 is increased from the center of the contact carrier 1 to the outside accordingly.
  • FIG. 4 shows schematically, illustrated as a bar chart, an example of a first possibility of the contact force assignment in a contact carrier according to the Fig.1.
  • the adjustment of the contact force of the individual contact lever 2 is relatively finely executed and it was also the uneven increase in contact-lifting forces on the two sides of the contact carrier 1 taken into account.
  • such a fine-scale adjustment of the contact force is relatively expensive and certainly not necessary in any case because of the large number of different contact force springs required for this purpose.
  • Fig. 5 is therefore shown schematically, as a bar chart, an example of a further possibility of contact force assignment in a contact carrier 1 according to the Fig.1 shown, in which the increase in contact-lifting forces is taken into account in the required account, the number of needed different contact force springs but remains in a reasonable dimension.
  • the contact force for each two outer contact lever 2 is increased, while the remaining contact lever are each subjected to an equal, normal contact force.
  • the invention avoids the problems caused by the contacting forces, such as reducing the current carrying capacity of the contact system due to reduced contact pressure, the risk of uneven heating of the contact lever of a contact carrier and a reduction of the mechanical load of the drive system.

Landscapes

  • Contacts (AREA)
  • Breakers (AREA)

Claims (12)

  1. Agencement de contacts de commutation pour disjoncteurs basse-tension, avec des leviers de contact sollicités par des ressorts d'une force de ressort différente,
    caractérisé en ce que les leviers de contact (2) disposés à l'extérieur sur un support (1) de contacts dans un système à contacts multiples, sont sollicités par des forces de contact plus grandes que ceux disposés à l'intérieur.
  2. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que les forces de contact des leviers de contact (2) disposés à l'intérieur sont augmentées en direction des leviers de contact (2) disposés à l'extérieur, d'une manière continuelle, selon un étagement par faibles gradins.
  3. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que les forces de contact des leviers de contact (2) disposés à l'intérieur sont augmentées en direction des leviers de contact (2) disposés à l'extérieur, selon un étagement en deux gradins ou davantage.
  4. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que les forces de contact des leviers de contact (2) disposés à l'intérieur sont augmentées en direction des leviers de contact (2) disposés à l'extérieur, selon un étagement à seulement un seul gradin.
  5. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que l'étagement des forces de contact sur le support (1) de contacts est prévu de l'intérieur vers l'extérieur, de manière symétrique par rapport à son axe central ou médian.
  6. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que l'étagement des forces de contact sur le support (1) de contacts est prévu de l'intérieur vers l'extérieur, de manière non symétrique par rapport à son axe central ou médian.
  7. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que le réglage des différentes forces de contact pour les leviers de contact (2) individuels, est produit par des ressorts de force de contact de puissance différente ou des combinaisons de ressorts de force de contact.
  8. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que le réglage des différentes forces de contact pour les leviers de contact (2) individuels, est produit par des configurations de forme différentes des supports (1) de contact recevant les ressorts de force de contact individuels.
  9. Agencement de contacts de commutation selon la revendication 8,
    caractérisé en ce que les logements de réception pour les ressorts de force de contact dans le support (1) de contacts, présentent des longueurs différentes.
  10. Agencement de contacts de commutation selon la revendication 1,
    caractérisé en ce que le réglage des différentes forces de contact pour les leviers de contact (2) individuels, est produit par des configurations de forme différentes des leviers de contact (2).
  11. Agencement de contacts de commutation selon la revendication 10,
    caractérisé en ce que les leviers de contact (2) sont pourvus d'appendices en saillie de façon différente, pour les ressorts de force de contact.
  12. Agencement de contacts de commutation selon la revendication 10,
    caractérisé en ce que les leviers de contact (2) présentent, au niveau du point d'application des ressorts de force de contact, dans leur direction de mouvement, des profondeurs différentes.
EP20010250326 2000-10-31 2001-09-17 Dispositif de contact de commutation pour disjoncteur basse tension Expired - Lifetime EP1202303B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000154497 DE10054497A1 (de) 2000-10-31 2000-10-31 Schaltkontaktanordnung für Niederspannungs-Leistungsschalter
DE10054497 2000-10-31

Publications (3)

Publication Number Publication Date
EP1202303A2 EP1202303A2 (fr) 2002-05-02
EP1202303A3 EP1202303A3 (fr) 2002-09-25
EP1202303B1 true EP1202303B1 (fr) 2006-11-29

Family

ID=7662020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010250326 Expired - Lifetime EP1202303B1 (fr) 2000-10-31 2001-09-17 Dispositif de contact de commutation pour disjoncteur basse tension

Country Status (2)

Country Link
EP (1) EP1202303B1 (fr)
DE (2) DE10054497A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2752647C2 (ru) * 2016-09-15 2021-07-29 Шнейдер Электрик Эндюстри Сас Прерыватель электрической цепи с разделяемыми электрическими контактами

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346361B3 (de) * 2003-09-30 2005-02-03 Siemens Ag Anschlussschienen-Anordnung für einen elektrischen Schalter und elektrischer Schalter mit einer Anschlussschienen-Anordnung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926798C (de) * 1944-11-03 1955-04-25 Siemens Ag Kontaktanordnung
DE3544668A1 (de) * 1985-12-13 1987-06-19 Siemens Ag Mehrgliedrige druckkontaktanordnung fuer leistungsschalter
DE19727696B4 (de) * 1997-06-20 2007-09-13 Siemens Ag Bewegbarer Schaltkontakt für Niederspannungs-Leistungsschalter
US6005206A (en) * 1998-05-07 1999-12-21 Eaton Corporation Electrical switching apparatus with improved contact arm carrier arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2752647C2 (ru) * 2016-09-15 2021-07-29 Шнейдер Электрик Эндюстри Сас Прерыватель электрической цепи с разделяемыми электрическими контактами

Also Published As

Publication number Publication date
DE10054497A1 (de) 2002-05-02
DE50111533D1 (de) 2007-01-11
EP1202303A2 (fr) 2002-05-02
EP1202303A3 (fr) 2002-09-25

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