EP0185277B2 - Elektrischer Leitungsschutzschalter - Google Patents

Elektrischer Leitungsschutzschalter Download PDF

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Publication number
EP0185277B2
EP0185277B2 EP85115581A EP85115581A EP0185277B2 EP 0185277 B2 EP0185277 B2 EP 0185277B2 EP 85115581 A EP85115581 A EP 85115581A EP 85115581 A EP85115581 A EP 85115581A EP 0185277 B2 EP0185277 B2 EP 0185277B2
Authority
EP
European Patent Office
Prior art keywords
limb
guide rail
arc guide
arc
contact member
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
EP85115581A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0185277A3 (en
EP0185277B1 (de
EP0185277A2 (de
Inventor
Erwin Ing. Grad. Muders
Rudolf Sellner
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6253023&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0185277(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0185277A2 publication Critical patent/EP0185277A2/de
Publication of EP0185277A3 publication Critical patent/EP0185277A3/de
Publication of EP0185277B1 publication Critical patent/EP0185277B1/de
Application granted granted Critical
Publication of EP0185277B2 publication Critical patent/EP0185277B2/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
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • 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 an electrical circuit breaker according to the preamble of claim 1.
  • circuit breakers have become known, all of which have the same structure. They have a contact point which is formed from a fixed and a movable contact piece; the fixed contact piece is followed on one side by the power supply and on the other side by an arc guide rail, which drives the arc into an arc quenching plate package.
  • the power feed point is located in front of the contact point. in relation to the arc guide rail connected to it and also to the direction of arc travel. Due to the assignment of the current feed rail to the contact piece and the arc guide rail to the movable contact lever on which the movable contact piece is attached, a U-shaped blow loop is formed which tries to expand the arc and drives it into the arc quenching chamber.
  • An electrical circuit breaker of the type mentioned is known from FR-A 2 378 344.
  • a U-shaped contact carrier is provided. to which a fixed contact piece is attached.
  • a blow piece forming a rectangular loop is connected to the contact support, so that the arc is to be extinguished by the U-shaped contact support in connection with the blow piece.
  • the blow piece is therefore a necessary part in the execution according to FR-A 2 378 344.
  • the object of the invention is to provide a circuit breaker of the type mentioned, in which an optimal discharge of the arc from the contact point into the arc extinguishing plate is achieved with less space.
  • This arrangement is to be used in a particularly advantageous manner when the current feed point, which is designed as a plug pin, must be arranged in the immediate vicinity of the arc guide rail due to lack of space in the case of pluggable circuit breakers.
  • connection between the leg and the arc guide rail is made by means of a screw which lies approximately in the middle of the leg between the connection point of the heating coil of the thermobimetal and a web connecting the two legs to one another to form a U-shape.
  • a power feed point to the line circuit breaker designed as a plug pin is not present and, moreover, the connection point between the U-shaped bracket and the arc guide rail is also not designed as a power feed point.
  • the only figure shows an enlarged illustration of a circuit breaker in the contact point area with a movable contact lever and arc guide rail.
  • the electrical switch in which the arrangement according to the invention is to be used, is a commercially available circuit breaker with an electromagnetic release (not shown in more detail), a thermal release, a switch lock and an arc-quenching plate packet, all of which are available in a commercially available manner together with the arrangement shown in the figure Shell-type housings can be used.
  • the circuit breaker in which the invention is to be applied, is not provided with screw terminals, but with plug pins 10 which are formed on a bracket 11.
  • This bracket 11 has in its bottom region 12 a recess 13 through which a screw 14 is inserted, with which the bracket 11 is fastened to an arc guide rail 15.
  • the arc guide rail 15 is again commercially available and has an essentially L-shaped shape with a leg 16 which opens into the area of an arc quenching plate packet 17 (which is only indicated in the drawing); the other leg 18 of the arc guide rail has a passage 19 into which the screw 14 is screwed.
  • the leg 18 runs perpendicular to the leg 16 with the interposition of an area 20 running obliquely at an angle of approximately 45 ° to both legs.
  • a leg end of a U-shaped horn 21 is arranged between the web or bottom region 12 of the bracket 11 and the leg 18 of the arc guide rail 15.
  • This horn 21 has a first leg 22 with a Bore 23 into which the passage 19 of the arc guide rail 15 partially engages and with which the horn 21 is guided in relation to the leg 18 of the arc guide rail 15 in cooperation with the passage 19.
  • a connecting web 24 adjoins the leg 22 and is angled at an acute angle ⁇ (approximately 70 °) to the leg 22.
  • the distance of the end of the region 26 connected to the connecting web 24 from the first leg 22 is greater than the parallel region 27;
  • the two legs 22 and 25 are of different lengths, their ends 28 and 29 open in one and the same plane, which is perpendicular to the leg 22.
  • a movable contact piece 30 (shown in dashed lines) is applied, which is formed on a movable contact lever 31.
  • a U-shaped blow loop is formed which drives the arc in a manner known per se in the direction of arrow P, so that the arc 32, 32 'on the movable contact piece 30 migrates on one side and on the second leg 25 from its area 26 to area 27 and after skipping from area 27 to area 20 of the arc guide rail 15 on the other side until it has entered the arc-quenching plate packet 17 and is extinguished there.
  • the current is switched out of the horn 21, so that now no longer the current I but a current I 1 flows bypassing the horn.
  • the configuration according to the invention on the one hand facilitates assembly and, moreover, also facilitates the attachment of the fixed contact piece; in addition, it has been found that the arc run is improved by the shape according to the invention. It is particularly advantageous that the current feed point can be provided independently of the contact point 30/26 without the arcing being prevented by appropriate current paths.
  • the current feed and the attachment of the connecting pins 10 to the bracket 11 are simultaneously used for holding and for attaching the fixed contact piece to the arc guide rail.
  • the assembly is therefore simplified in particular because a separate attachment of a fixed contact piece and a screw terminal for the current feed is no longer necessary.
  • the connection of the fixed contact piece to the arc guide rail is a non-positive connection, not a welded connection, which also has advantages.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP85115581A 1984-12-18 1985-12-07 Elektrischer Leitungsschutzschalter Expired - Lifetime EP0185277B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843446041 DE3446041A1 (de) 1984-12-18 1984-12-18 Elektrischer leitungsschutzschalter
DE3446041 1984-12-18

Publications (4)

Publication Number Publication Date
EP0185277A2 EP0185277A2 (de) 1986-06-25
EP0185277A3 EP0185277A3 (en) 1988-11-30
EP0185277B1 EP0185277B1 (de) 1991-10-23
EP0185277B2 true EP0185277B2 (de) 1994-04-20

Family

ID=6253023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115581A Expired - Lifetime EP0185277B2 (de) 1984-12-18 1985-12-07 Elektrischer Leitungsschutzschalter

Country Status (2)

Country Link
EP (1) EP0185277B2 (enrdf_load_stackoverflow)
DE (2) DE3446041A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915127C1 (enrdf_load_stackoverflow) * 1989-05-09 1990-09-06 Flohr, Peter, Dipl.-Ing., 7790 Messkirch, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051935B (de) * 1956-05-15 1959-03-05 Siemens Ag Elektrisches Schaltgeraet mit Lichtbogenkammer
DE1062316B (de) * 1958-04-03 1959-07-30 Licentia Gmbh Lichtbogenloeschkammer fuer Luftschuetze
US3555471A (en) * 1968-02-28 1971-01-12 Vni I Pk I Electr Oapparatov Automatic breaker with coil adjustable to effect current limiting or electrodynamic blowoff compensation
FR2378344A1 (fr) * 1977-01-25 1978-08-18 Telemecanique Electrique Piece de soufflage
FR2461349A1 (fr) * 1979-07-12 1981-01-30 Merlin Gerin Chambre de coupure perfectionnee pour disjoncteur basse tension multipolaire a boitier moule

Also Published As

Publication number Publication date
DE3446041C2 (enrdf_load_stackoverflow) 1993-05-19
EP0185277A3 (en) 1988-11-30
DE3446041A1 (de) 1986-06-19
EP0185277B1 (de) 1991-10-23
EP0185277A2 (de) 1986-06-25
DE3584506D1 (de) 1991-11-28

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