EP0555161A1 - Dispositif de coupure à contacts multiples - Google Patents

Dispositif de coupure à contacts multiples Download PDF

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Publication number
EP0555161A1
EP0555161A1 EP93420044A EP93420044A EP0555161A1 EP 0555161 A1 EP0555161 A1 EP 0555161A1 EP 93420044 A EP93420044 A EP 93420044A EP 93420044 A EP93420044 A EP 93420044A EP 0555161 A1 EP0555161 A1 EP 0555161A1
Authority
EP
European Patent Office
Prior art keywords
finger
fingers
head
heel
transverse
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.)
Withdrawn
Application number
EP93420044A
Other languages
German (de)
English (en)
French (fr)
Inventor
Robert Morel
Marc Serpinet
Xavier Thomassin
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.)
Schneider Electric SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
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 Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0555161A1 publication Critical patent/EP0555161A1/fr
Withdrawn legal-status Critical Current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
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H9/383—Arcing contact pivots relative to the movable contact assembly

Definitions

  • the invention relates to an electrical switching device with multiple contacts, particularly well suited for a low voltage multipolar circuit breaker with high intensities.
  • a breaking device comprises a movable contact assembly and a fixed contact assembly.
  • a multi-contact breaking device In order to reduce the contact resistance and improve the electrodynamic behavior at the level of the contact parts, it is known to use a multi-contact breaking device.
  • Document FR-A-2.650.434 describes in particular a multipole circuit breaker in which the movable contact assembly of a pole is provided with a plurality of contact fingers which extend parallel in a longitudinal direction and which are pivotally mounted around a transverse direction; one end of each finger, the head, is provided with a movable contact piece, while the other end of each finger, the heel, is connected by a flexible conductor to a common fixed pad.
  • the fixed contact assembly of each pole is provided with fixed contact parts, intended to cooperate, in the closed position, with the mobile contact parts.
  • the invention aims to improve the electrodynamic behavior at the contact parts, without increasing the number of contact fingers; to this end, it takes advantage of the electrodynamic forces developed at the level of the contact fingers.
  • the movable contact assembly comprises at least one pair of contact fingers superposed in a plane perpendicular to the transverse direction, an upper finger relative to the fixed contact assembly, pivotally mounted on a first transverse axis more closer to his heel than to his head, and a lower finger pivotally mounted on a second transverse axis closer to his head than to his heel.
  • the heels of the upper and lower fingers end substantially in the same transverse plane, and the first transverse axis associated with the upper finger is located in the vicinity of its heel.
  • the longitudinal distance between the two transverse axes is substantially equal to twice the longitudinal distance separating the second axis from the head of the lower finger; and the distance between the respective longitudinal webs of the two fingers is less than or equal to one third of the length of the lower finger.
  • the movable contact assembly of the breaking device for a pole is schematically represented, by way of illustration, by a support cage 1 pivotally mounted on a transverse axis 2.
  • the cage 1 which is preferably made of insulating material, pivots around the axis 2 between a closed position (figure 1) and an open position (figure 2).
  • the fixed contact assembly of the pole is schematically represented, for example, by a fixed upstream pad 3, provided with two fixed contact pieces 4.5.
  • a pair of contact fingers 10, 20 extend parallel to the longitudinal direction L, superimposed in the same longitudinal plane perpendicular to the transverse direction of the axis 2.
  • the head 15 of the finger 10, designated the upper finger 10 relative to the fixed contact assembly 3, is provided with a movable contact piece 11 intended to cooperate with the fixed contact piece 4; the other end of the finger 10, designated the heel 12, is connected to a flexible conductor 16, for example a braid, which electrically connects the upper finger 10 to the downstream fixed range 6.
  • the contact finger 20, designated the lower contact finger 20, is provided at its head 25 with a movable contact piece 21, intended to cooperate with the fixed contact piece 5; the other end of the lower finger 20, the heel 22, is connected by a braid 26 to the downstream fixed area 6.
  • the two fingers 10, 20 are therefore traversed by electric currents respectively mutually parallel and in the same direction.
  • the two fingers 10, 20 have substantially identical sections, so as to be traversed by substantially equal intensities.
  • the upper finger 10 is pivotally mounted on a transverse axis 13 closer to its heel 12 than to its head 15, while the lower finger 20 is pivotally mounted on another transverse axis 23 closer to its head 25 than heel 22.
  • the device is particularly well suited for a low voltage circuit breaker with high intensities, because the repulsion forces R can be perfectly compensated by the attraction forces A, this whatever the intensity.
  • the heels 12, 22 are located in the same transverse plane, the upper finger 10 being slightly longer than the lower finger 20, so that the head 15 slightly exceeds the head 5, thus allowing the moving contact parts 11, 21 to come into contact with the fixed contact parts 4.5.
  • the transverse axis 13 is located in the vicinity of the heel 12.
  • the transverse axis 23 will then be arranged at a longitudinal distance (21 / 3) the axis 13 which is substantially twice the longitudinal distance (1/3) separating the axis 23 from the head 25; and a distance d between the respective cores of the upper 10 and lower fingers 20 will be chosen which is less than or equal to one third of the length separating the transverse axis 13 from the point of contact between the fixed 5 and movable contact parts 21, the length being therefore substantially equal to the length of the lower finger 20.
  • the upper 10 and lower 20 fingers can also be fitted with contact pressure springs.
  • the upper finger 10 is subjected to a contact pressure spring 14 placed between the cage 1 and the finger 10, and acting on the latter in the vicinity of the head 15;
  • the lower finger 20 is subjected to a contact pressure spring 24 placed between the cage 1 and the finger 20, and acting in the vicinity of the heel 22.
  • each pole of the cut-off device described above may comprise two or more pairs of fingers, upper 10A, 10B, 10C, and lower 20A, 20B , 20C, arranged parallel side by side in the transverse direction, the set of upper fingers 10A, 10B, 10C then being pivotally mounted on the same transverse axis 13, the set of lower fingers 20A, 20B, 20C, being it pivotally mounted on the same transverse axis 23.
  • the common upstream pad 3 is provided with two fixed contact parts 4 and 5 common to all of the pairs of fingers; similarly, the downstream area 6 is also common to all of the pairs of fingers.

Landscapes

  • Breakers (AREA)
  • Scissors And Nippers (AREA)
  • Contacts (AREA)
EP93420044A 1992-02-07 1993-01-27 Dispositif de coupure à contacts multiples Withdrawn EP0555161A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9201487 1992-02-07
FR9201487A FR2687250A1 (fr) 1992-02-07 1992-02-07 Dispositif de coupure a contacts multiples.

Publications (1)

Publication Number Publication Date
EP0555161A1 true EP0555161A1 (fr) 1993-08-11

Family

ID=9426503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93420044A Withdrawn EP0555161A1 (fr) 1992-02-07 1993-01-27 Dispositif de coupure à contacts multiples

Country Status (4)

Country Link
US (1) US5296660A (enrdf_load_stackoverflow)
EP (1) EP0555161A1 (enrdf_load_stackoverflow)
JP (1) JPH0628940A (enrdf_load_stackoverflow)
FR (1) FR2687250A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29604726U1 (de) * 1996-03-14 1996-05-23 Klöckner-Moeller GmbH, 53115 Bonn Stromzuführung für armförmige bewegliche Kontakte eines Niederspannungs-Schutzschalters
CN104701109A (zh) * 2015-03-23 2015-06-10 乐清野岛机电有限公司 一种断路器的触头系统

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US6326869B1 (en) 1999-09-23 2001-12-04 General Electric Company Clapper armature system for a circuit breaker
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US6317018B1 (en) 1999-10-26 2001-11-13 General Electric Company Circuit breaker mechanism
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ES2249875T3 (es) 1999-11-03 2006-04-01 AEG NIEDERSPANNUNGSTECHNIK GMBH & CO. KG Disposicion de brazo de contacto rotatorio para disyuntor.
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US6429759B1 (en) 2000-02-14 2002-08-06 General Electric Company Split and angled contacts
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US6281458B1 (en) 2000-02-24 2001-08-28 General Electric Company Circuit breaker auxiliary magnetic trip unit with pressure sensitive release
US6204743B1 (en) 2000-02-29 2001-03-20 General Electric Company Dual connector strap for a rotary contact circuit breaker
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US6232859B1 (en) 2000-03-15 2001-05-15 General Electric Company Auxiliary switch mounting configuration for use in a molded case circuit breaker
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US6995640B2 (en) * 2000-05-16 2006-02-07 General Electric Company Pressure sensitive trip mechanism for circuit breakers
US6400245B1 (en) 2000-10-13 2002-06-04 General Electric Company Draw out interlock for circuit breakers
US6531941B1 (en) 2000-10-19 2003-03-11 General Electric Company Clip for a conductor in a rotary breaker
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Publication number Priority date Publication date Assignee Title
FR1305080A (fr) * 1961-11-07 1962-09-28 Elektro App Werke Veb Interrupteur à rupture brusque limiteur de courant
DE1176239B (de) * 1961-06-20 1964-08-20 Bbc Brown Boveri & Cie Elektrischer Schalter mit elektrodynamischer Kontaktdruckverstaerkung
US3770922A (en) * 1972-07-27 1973-11-06 Ite Imperial Corp Circuit breaker contact structure
EP0410902A1 (fr) * 1989-07-26 1991-01-30 Merlin Gerin Disjoncteur basse tension à contacts multiples et à fortes intensités

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Publication number Priority date Publication date Assignee Title
DE1176239B (de) * 1961-06-20 1964-08-20 Bbc Brown Boveri & Cie Elektrischer Schalter mit elektrodynamischer Kontaktdruckverstaerkung
FR1305080A (fr) * 1961-11-07 1962-09-28 Elektro App Werke Veb Interrupteur à rupture brusque limiteur de courant
US3770922A (en) * 1972-07-27 1973-11-06 Ite Imperial Corp Circuit breaker contact structure
EP0410902A1 (fr) * 1989-07-26 1991-01-30 Merlin Gerin Disjoncteur basse tension à contacts multiples et à fortes intensités

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29604726U1 (de) * 1996-03-14 1996-05-23 Klöckner-Moeller GmbH, 53115 Bonn Stromzuführung für armförmige bewegliche Kontakte eines Niederspannungs-Schutzschalters
CN104701109A (zh) * 2015-03-23 2015-06-10 乐清野岛机电有限公司 一种断路器的触头系统

Also Published As

Publication number Publication date
FR2687250B1 (enrdf_load_stackoverflow) 1997-02-14
JPH0628940A (ja) 1994-02-04
FR2687250A1 (fr) 1993-08-13
US5296660A (en) 1994-03-22

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