EP0794547A1 - Elektrischer Schutzschalter mit elektromagnetischen Betätiger und Betätigungsmechanismus - Google Patents

Elektrischer Schutzschalter mit elektromagnetischen Betätiger und Betätigungsmechanismus Download PDF

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Publication number
EP0794547A1
EP0794547A1 EP97410022A EP97410022A EP0794547A1 EP 0794547 A1 EP0794547 A1 EP 0794547A1 EP 97410022 A EP97410022 A EP 97410022A EP 97410022 A EP97410022 A EP 97410022A EP 0794547 A1 EP0794547 A1 EP 0794547A1
Authority
EP
European Patent Office
Prior art keywords
pallet
circuit breaker
breaker according
central section
pole pieces
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Withdrawn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
EP97410022A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Ramirez
Philippe Delcambre
Jean Barral Baron
Jean-Bruno Comino
Didier Lebouc
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 Industries SAS
Original Assignee
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0794547A1 publication Critical patent/EP0794547A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism

Definitions

  • the present invention relates to an electric circuit breaker comprising a control mechanism, an electromagnetic actuator, separable contacts associated with a breaking chamber, said actuator having a magnetic circuit comprising in particular a core on which is mounted an excitation means, a first air gap in which an arm of a movable contact extends to occupy a rest position in the closed state of the separable contacts and an active position of separation of these contacts when the current intensity exceeds a predetermined threshold, a pivoting pallet cooperating with pole faces of the magnetic circuit to close a second air gap located opposite said first air gap and a striker associated with the pallet and arranged to act on the arm of the movable contact, after attraction of the pallet.
  • Electric circuit breakers of this type are already known in which, when there is a flow, a pivoting pallet is attracted against a polar face of the magnetic circuit, this pallet being associated with a striker which repels a movable contact and causes the unlocking of the control mechanism.
  • a pivoting pallet is attracted against a polar face of the magnetic circuit, this pallet being associated with a striker which repels a movable contact and causes the unlocking of the control mechanism.
  • the air gap is important in the initial phase, this air gap decreasing during the movement of the pallet.
  • the object of the invention is to provide an electrical circuit breaker of the type mentioned in the preamble, the paddle of which can be actuated quickly by a relatively small flow.
  • circuit breaker according to the invention characterized in that said pivoting pallet has an enveloping shape which extends laterally over at least part of the pole pieces.
  • said pallet comprises a central section and two wings arranged symmetrically on either side of the central section, these wings being folded laterally relative to the latter.
  • this device comprises a single piece of copper which constitutes both a contact area, a half-turn of the magnetic circuit of the electromagnetic actuator, a fixed contact support and an upper arc horn of the breaking chamber. .
  • the circuit breaker 10 of the type with molded insulating housing shown comprises a control mechanism 11, a manual control handle 12, an actuator electromagnetic 13 and separable contacts 14 and 15 associated with a breaking chamber 16.
  • the electromagnetic actuator 13 comprises a magnetic circuit 17 comprising a core 18 on which is mounted an excitation conductor 19 in the form of a half-turn, a first air gap 20 (see FIG. 2) in which extends an arm 21 carrying the movable contact 15 which occupies a rest position in the closed state of the separable contacts 14, 15 and an active position of separation of these contacts when the current intensity exceeds a predetermined threshold, a pivoting pallet 22 cooperating with polar faces of the magnetic circuit 17 to form a second air gap 23 located opposite the first air gap 20.
  • FIG. 2 represents a detailed perspective view which more specifically illustrates the magnetic circuit 17.
  • a contact pad 24 is connected to a half-turn 25 of the coil which extends, as shown in FIG. 1, into the chamber cutting 16 to form an upper arc horn 26 of this chamber.
  • the pivoting pallet 22 has an enveloping shape, that is to say that it has a slightly curved central section 27 and two wings 28 arranged symmetrically apart. and other of the central section 27, these wings being folded laterally relative to the central section.
  • the central section 27 and the wings 28 of the pallet 22 are substantially parallel to the pole pieces 29 and 30 of the magnetic circuit 17. In their front part, these pole pieces have a curved shape or consist of two segments folded together forming a angle of the order of 150 to 180 °.
  • the central section 27 of the pallet has this same curved or folded shape, so that the pallet 22 is, in its central section 27, substantially parallel to the front part of the pole pieces 29 and 30.
  • the wings 28 form with respect to the central section 27 of the pallet 22 of angles substantially between 90 ° and 150 °, and preferably close to 120 °.
  • the distance a between the central section 27 of the latter and the front part of the pole pieces 29, 30 is greater than the distance e between the wings 28 and the lateral parts of the pole pieces. Therefore, the reluctance to overcome is low since this reluctance depends on the distance e which is less than the distance a .
  • FIG. 4 illustrates the rest position of the pallet 22 and its final position, after pivoting, designated by the reference 22 '.
  • the latter is associated with a spring 40 whose shape is adjustable.
  • the air gap that is to say the distance a defined with reference to FIG. 3, is adjustable by means of a screw 41 (see FIG. 1).
  • the half-turn 25 of the magnetic circuit 17 of the electromagnetic actuator 13, the contact pad 24, the support of the fixed contact 14 and the upper arcing horn 26 of the breaking chamber 16 consist of a single piece of copper.
  • the excitation conductor 19 is constituted by a coil surrounding the core 18.
EP97410022A 1996-03-08 1997-02-25 Elektrischer Schutzschalter mit elektromagnetischen Betätiger und Betätigungsmechanismus Withdrawn EP0794547A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603181 1996-03-08
FR9603181A FR2745949B1 (fr) 1996-03-08 1996-03-08 Disjoncteur electrique a actionneur electromagnetique et mecanisme de commande

Publications (1)

Publication Number Publication Date
EP0794547A1 true EP0794547A1 (de) 1997-09-10

Family

ID=9490160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97410022A Withdrawn EP0794547A1 (de) 1996-03-08 1997-02-25 Elektrischer Schutzschalter mit elektromagnetischen Betätiger und Betätigungsmechanismus

Country Status (2)

Country Link
EP (1) EP0794547A1 (de)
FR (1) FR2745949B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1376639A1 (de) * 2002-06-17 2004-01-02 Hager Electro S.A. Elektromagnetischer Auslöser mit linear bewegtem Tauchkolben

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572086C (de) * 1931-06-16 1933-03-10 Aeg Magnet mit Gleitanker, insbesondere fuer UEberstromausloeser elektrischer Schalter
US4706054A (en) * 1986-09-15 1987-11-10 General Electric Company Thermal magnetic trip unit for molded case circuit breakers
US4963848A (en) * 1989-03-31 1990-10-16 Square D Company Non-jamming magnetic trip structure
EP0693765A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektromagnetischer Auslöser für einen Niederspannungsschutzschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572086C (de) * 1931-06-16 1933-03-10 Aeg Magnet mit Gleitanker, insbesondere fuer UEberstromausloeser elektrischer Schalter
US4706054A (en) * 1986-09-15 1987-11-10 General Electric Company Thermal magnetic trip unit for molded case circuit breakers
US4963848A (en) * 1989-03-31 1990-10-16 Square D Company Non-jamming magnetic trip structure
EP0693765A1 (de) * 1994-07-18 1996-01-24 Schneider Electric Sa Elektromagnetischer Auslöser für einen Niederspannungsschutzschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1376639A1 (de) * 2002-06-17 2004-01-02 Hager Electro S.A. Elektromagnetischer Auslöser mit linear bewegtem Tauchkolben

Also Published As

Publication number Publication date
FR2745949A1 (fr) 1997-09-12
FR2745949B1 (fr) 1998-04-17

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