EP0402357A1 - Agencement de contact avec une corne a arc electrique et un conducteur d'arc electrique. - Google Patents

Agencement de contact avec une corne a arc electrique et un conducteur d'arc electrique.

Info

Publication number
EP0402357A1
EP0402357A1 EP88909978A EP88909978A EP0402357A1 EP 0402357 A1 EP0402357 A1 EP 0402357A1 EP 88909978 A EP88909978 A EP 88909978A EP 88909978 A EP88909978 A EP 88909978A EP 0402357 A1 EP0402357 A1 EP 0402357A1
Authority
EP
European Patent Office
Prior art keywords
arc
contact arrangement
electric arc
main contacts
contacts
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
EP88909978A
Other languages
German (de)
English (en)
Other versions
EP0402357B1 (fr
Inventor
Andreas Cardinal
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 EP0402357A1 publication Critical patent/EP0402357A1/fr
Application granted granted Critical
Publication of EP0402357B1 publication Critical patent/EP0402357B1/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the invention relates to a contact arrangement for a low-voltage circuit breaker with main contacts for guiding a continuous current and with burnout contacts for igniting a switching arc in the entry region of an arc quenching chamber, and with an arc guide piece for transferring an arc occurring at the main contacts to the arc home.
  • a contact arrangement of this type is known from DE-A-35 39 673. According to this, it is provided that the arc guide pieces be produced as cast parts or as stamped and bent parts, with a massive, i.e. H. massive execution is regarded as advantageous. It has also been found that arc guide pieces designed as castings ensure the desired mode of operation.
  • the object of the invention is to create an arc guide piece which can be produced as a stamped and bent part and which, with a simple design, nevertheless fulfills the tasks of quickly and reliably leading arcs arising at the main contacts to the arc hoof.
  • the arc-guiding piece which is designed as a one-piece stamped and bent part, extends approximately parallel to the row of main contacts and is fastened to the carrier of the main contacts. 1 cycle serving base leg and one starting from its end remote from the arc and having an angular approach to the arc guide leg.
  • the known arc guide mentioned above is designed as a one-piece stamped and bent part, extends approximately parallel to the row of main contacts and is fastened to the carrier of the main contacts. 1 cycle serving base leg and one starting from its end remote from the arc and having an angular approach to the arc guide leg.
  • the new arc guide piece thus has no closed triangular shape. However, it was found that the same success as the triangular and solid arc guide piece was achieved.
  • the mounting surface for the arc guiding pieces available on the carrier of the main contact can, under certain circumstances, be of stepped design. In order to achieve a secure attachment for the arc guide pieces, it is therefore favorable to also attach the side of the light guide provided for attachment.
  • the arc guide piece provided as a stamped and bent part according to the invention can also be given this stepped shape by forming separate base part legs by an incision, which offset each other
  • FIG. 1 shows a section of a pole of a low-voltage circuit breaker with an arcing element.
  • FIG. 2 shows section II-II in FIG. 1, the left and right parts of FIG. 2 showing different embodiments. Details of the arc guide piece are shown in FIGS. 3, 4 and 5, each of which shows views that are at right angles to one another.
  • the contact arrangement 1 comprises a fixed part 2 and a movable part 3 in a known manner
  • Main contact is used and for this purpose is provided with a contact piece support 6 or a larger number of such contact piece supports.
  • a fixed burn-off contact 7 is fastened on the connecting rail 5 close to the contact piece support 6 and is likewise provided with a contact piece support 10.
  • the current band 12 establishes the electrically conductive connection with the movable TBÜ 3 of the contact arrangement 1, which is pivotably mounted about a hinge pin 13 arranged between the legs of the U-shaped curved current band 12.
  • the movable part 3 comprises a carrier 14 on which the main contact lever 16, which is connected to the current band 12, is pivotably mounted about a hinge pin 15. These are provided at their upper end with contact piece supports 17 which cooperate with the fixed contact piece supports 6. Furthermore, the carrier 14 has a burn-off contact 20 which has a contact piece support 21 which interacts with the fixed contact piece support 10. Both the stationary part 2 and the movable part 3 of the contact arrangement have an arc heater 22 or 23 in order to convert switching arcs into an arc quenching chamber 24.
  • FIG. 2 shows, there are two fixed contact piece supports 6 as main contacts. Accordingly, the movable part 3 of the contact arrangement 1 has two arranged side by side. Nete contact lever with contact piece supports 17. Depending on the current that the circuit breaker is supposed to control with permissible heating, a larger number of main contacts can be provided. To illustrate this, two contact piece supports 6 are shown in the right part of FIG. 2, so that in this embodiment the contact arrangement has a total of four main contacts.
  • a switching arc arises, only at the burn-off contacts, provided that the total current flowing through the contact arrangement does not have a certain height exceeds.
  • the switching arc is then taken over by the arcing horns 22 and 23 and transferred to the arc quenching chamber 24.
  • the current exceeds a certain size, the current is not completely mutated to the burn-off contacts, with the result that also at the main contacts, i. H. occur between the contact piece supports 6 and 17 partial arcs.
  • These partial arcs are taken over by arc guide pieces 30 and 40, which are shown in FIG. 3 in a form to be adapted to the respective embodiment of the contact arrangement. As can be seen, these arc guide pieces form guide edges for taking over the partial arcs occurring at the main contacts and for transferring them to the arc home 22.
  • the arc guide piece 30 is a stamped and bent part made of sheet steel and has a base leg 31 which has two base part legs 33 and 34 separated by an incision 32.
  • the base legs 33 and 34 have a mutual offset by an amount designated by 35.
  • the arc guide piece 30 has an arc guide leg 36, which is at an acute angle to the base leg 31 and leads with its upper, bent end part 37 to the arc home 22.
  • the above-explained shape of the arc guide pieces can be applied to different widths, ie. H.
  • contact arrangements provided can be easily adapted so that the base leg is given a corresponding length and the length and the angular position of the arc guiding leg are selected appropriately. In this way, the arc guide piece 40 is obtained.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Abstract

Un agencement de contact (1) pour sectionneurs de puissance à basse tension comprend des contacts principaux et des contacts pare-étincelles (6, 17; 10; 21), et des cornes à arc électrique (22, 23) qui transfèrent un arc électrique commutateur à une tuyère d'arc électrique. Des conducteurs supplémentaires (30; 40) d'arc électrique absorbent des arcs électriques partiels pouvant survenir lors d'une sollicitation élevée de l'agencement de contact (1) au niveau des contacts principaux (6; 17) et les conduisent à la corne correspondante d'arc électrique (22). Les conducteurs (30; 40) d'arc électrique sont fabriqués en une seule pièce par cintrage et découpage; une des branches conductrices (36) d'arc électrique part d'une branche de base (31) de fixation et forme un angle aigu avec la corne d'arc électrique (22).
EP88909978A 1987-11-25 1988-11-04 Agencement de contact avec une corne a arc electrique et un conducteur d'arc electrique Expired - Lifetime EP0402357B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8715757U DE8715757U1 (de) 1987-11-25 1987-11-25 Niederspannungs-Leistungsschalter
DE8715757U 1987-11-25

Publications (2)

Publication Number Publication Date
EP0402357A1 true EP0402357A1 (fr) 1990-12-19
EP0402357B1 EP0402357B1 (fr) 1991-10-30

Family

ID=6814549

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88909978A Expired - Lifetime EP0402357B1 (fr) 1987-11-25 1988-11-04 Agencement de contact avec une corne a arc electrique et un conducteur d'arc electrique

Country Status (4)

Country Link
US (1) US5013875A (fr)
EP (1) EP0402357B1 (fr)
DE (2) DE8715757U1 (fr)
WO (1) WO1989005036A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA432817A (fr) * 1942-08-26 1946-01-29 Canadian Westinghouse Company Interrupteur electrique
DE1000486B (de) * 1954-05-04 1957-01-10 Calor Emag Elektrizitaets Ag Hornfoermiger Schaltkontakt mit einer Einlage aus magnetischem Material
US3784775A (en) * 1972-07-27 1974-01-08 Ite Imperial Corp Arc runner between stationary contacts
DE3539673A1 (de) * 1985-11-06 1987-05-07 Siemens Ag Kontaktanordnung fuer niederspannungs-leistungsschalter mit hauptkontakten und abbrennkontakten
FR2613125B1 (fr) * 1987-03-26 1995-01-06 Merlin Gerin Piece de contact d'un disjoncteur miniature et procede de fabrication d'une telle piece a partir d'une bande bimetallique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8905036A1 *

Also Published As

Publication number Publication date
US5013875A (en) 1991-05-07
DE3865975D1 (de) 1991-12-05
EP0402357B1 (fr) 1991-10-30
WO1989005036A1 (fr) 1989-06-01
DE8715757U1 (de) 1988-02-18

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