EP0053973B1 - Disjoncteur miniature à haut pouvoir de coupure - Google Patents

Disjoncteur miniature à haut pouvoir de coupure Download PDF

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Publication number
EP0053973B1
EP0053973B1 EP19810401899 EP81401899A EP0053973B1 EP 0053973 B1 EP0053973 B1 EP 0053973B1 EP 19810401899 EP19810401899 EP 19810401899 EP 81401899 A EP81401899 A EP 81401899A EP 0053973 B1 EP0053973 B1 EP 0053973B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
housing
chambers
arcing
contact
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
Application number
EP19810401899
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0053973A1 (fr
Inventor
Gérard Terrier
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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=9248881&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0053973(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0053973A1 publication Critical patent/EP0053973A1/fr
Application granted granted Critical
Publication of EP0053973B1 publication Critical patent/EP0053973B1/fr
Expired 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
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/04—Co-operating contacts of different material
    • 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
    • H01H71/1045—Multiple circuits-breaker, e.g. for the purpose of dividing current or potential drop
    • 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
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/025—Composite material having copper as the basic material
    • 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
    • H01H71/121—Protection of release mechanisms
    • 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a miniature circuit breaker according to the preamble of claim 1.
  • Miniature circuit breakers are frequently used for the protection of terminal electrical distribution circuits, and the increase in installed power has created the need for circuit breakers with high breaking capacity.
  • An increase in breaking capacity can be obtained by connecting two unipolar circuit breakers in series, but the size and cost are thus doubled.
  • Document DE-A-2 234 423 describes a circuit breaker of the aforementioned type in which a mechanism controls two cut-off intervals belonging either to a common circuit or to separate circuits opening simultaneously, only one of the circuits comprising a trip device .
  • the contacts are fixed on either side of the mechanism on an axis projecting laterally from both sides of the mechanism, which requires a very wide housing.
  • Each mobile contact is connected by a braid to the associated fixed part, an expensive and fragile solution.
  • the two cutoff intervals must be connected in series by an external connection of two opposite terminals, difficult to achieve in a modular switchboard. This solution has the same drawbacks, but to a lesser degree, of connecting two poles in series.
  • Miniature circuit breakers belong to modular systems of electrical devices all having the same profile to be placed side by side on a support in a manner well known to specialists.
  • the structure and the arrangement of the constituent elements of this known miniature circuit breaker, in particular the arrangement of the sheets, of the breaking chambers, perpendicular to the bottom of the housing, do not allow compliance with the standardized dimensions of the modules, and the object of the present invention is to allow the creation of a miniature circuit breaker with reduced overall dimensions and high breaking capacity.
  • the miniature circuit breaker according to the invention retains the general structure of the circuit breaker commercially known as C 32 and described in document FR-A-2 344 949, only the width of the housing being increased and increased to 25 mm, so as to have a Sufficient space for the side by side accommodation of the two breaking chambers and the magnetic release coil of increased section.
  • the auxiliaries, in particular the differential protection unit, the remote opening control of the circuit breaker C 32 or the auxiliary contacts can thus be associated without any modification to the circuit breaker according to the invention, to carry out the differential protection and / or the control of remote opening and signaling.
  • the two breaking chambers are separated by an insulating partition avoiding any untimely initiation and in the insulating partition is inserted a metal plate forming a screen extending to form a fixing lug for a bimetal of the thermal trigger.
  • the dual function of the metal plate, in this case screen and support of the bimetal strip, makes it possible to free the latter of any deformation of the housing subjected to overheating and stresses and to avoid any adjustment of the triggering threshold .
  • the metal plate for separating the breaking chambers is designed to constitute a shunt conductor for the magnetic trip device and the thermal trip device when the arc is drawn between the separated contacts.
  • the metal plate is extended on the side of the contacts and is shaped as an arc horn on which the arc switches as soon as it forms in a manner well known per se.
  • the magnetic trigger which acts by means of a striker directly on the contact fork to accelerate the movement of the latter in the opening direction
  • a magnetic flux closing carcass In order to increase the force of the magnetic trigger, which acts by means of a striker directly on the contact fork to accelerate the movement of the latter in the opening direction, it is known to surround the coil of the trigger by a magnetic flux closing carcass.
  • the metal carcass does not necessarily extend over all the faces of the coil, and according to a development of the invention, the face adjacent to the breaking chambers is open, so as to reduce the overall height.
  • the opposite face is advantageously also open for the same reason.
  • a housing 10 made of molded insulating material, consists of two half-shells 12, 14, assembled by rivets.
  • the housing 10 has a generally parallelepiped shape of small width, in particular of 25 mm.
  • the housing 10 has a bottom 16 for fixing to a symmetrical DIN rail and a front face 18 having a passage opening for a manual control handle 20.
  • On the narrow lateral faces 22, 24 of the housing 10 are terminals 26, 28 input and output of the circuit breaker, housed inside the box (fig. 5).
  • the lower part of the housing 10 adjacent to the bottom 16 is subdivided into two parts by an insulating partition 30 extending in the median plane of the housing 10.
  • an insulating partition 30 extending in the median plane of the housing 10.
  • a metal plate 32 is inserted inside the insulating partition 30 in two adjoining parts.
  • breaking chambers 34, 36 On either side of the insulating partition 30 are symmetrically arranged breaking chambers 34, 36, constituted by a stack of deionization sheets 38 extending parallel to the bottom 16.
  • the insulating partition 30 extends from both sides.
  • another of the interrupting chambers 34, 36 for separating on the one hand two arcing chambers 40, 42, situated in front of the interrupting chambers 34, 36 and on the other hand conduits 44 for exhausting the interrupting gas.
  • Electrodes 56, 58 extend the fixed contacts 46, 48 for connection to the end plates of the breaking chambers 34, 36.
  • the electrode 58 is connected directly to the fixed contact 48 without any continuity solution while the electrode 56 is separated from the fixed contact 46 by an insulating gap 60.
  • the electrode 56 is electrically connected to the plate 32 by means of a folded tab 62 of the latter.
  • the magnetic trigger 64 comprises a coil 68 with an axis parallel to the sheets 38, the coil 68 being surrounded by a metal carcass 70 having two large lateral faces 72, 74, attached to the shells 12, 14 and fixed to the latter by tenons 76 fitted into slots 78.
  • the carcass 70 does not extend on the lower faces and higher of the coil 68, respectively opposite the chambers 34, 36 and of the mechanism 66, so as to reduce the overall dimensions in height of the magnetic trip device 64.
  • a plunger core 80 mounted to slide axially in the coil 68, carries a extractor 82 acting on the contact-carrying fork 54 and actuating a pusher 84 acting on a trigger bar 86 of the mechanism 66.
  • the trigger bar 86 can also be actuated by a thermal trigger, constituted by a bimetallic strip 88.
  • the control mechanism 66 is of the type described in the aforementioned French patent No. 2,344,949, which will advantageously be referred to for further details. Only the dimensions of the component parts of the mechanism 66 have been increased to withstand the increased operating force by the presence of a double cut.
  • the contact-carrying fork 54 is articulated on a cradle 90 mounted for rotation on a fixed axis 92 and controlled by a link 94 articulated by its end opposite to the lever 20.
  • a hook 96 mounted for rotation on a fixed axis 98, cooperates by one of its ends with the trigger bar 86 and by its opposite end with the contact-carrying fork 54 to constitute a hooking.
  • the mechanism 66 naturally includes return and contact pressure springs (not shown), the assembly being arranged in such a way that a pivoting of the lever 20 causes the cradle 90 to tilt and move to the open position. or closing contacts 46, 50; 48, 52, of the contact carrier 54. An actuation of the trigger bar 86 by the magnetic trigger 64 or the bimetallic strip 88 releases the hook 96 and unlocks the contact carrier 54, which moves in the opening direction under the action of a return spring (not shown).
  • the control mechanism and its operation are well known to specialists.
  • the bimetallic strip 88 is fixed by means of a support 100 to a tab 102, constituted by an extension of the plate 32 inserted in the central insulating partition 30.
  • the intermediate piece 100 of elongated shape is fixed by one of its ends, for example by crimping, on the tab 102, while the opposite end cooperates with an adjustment screw 104 screwed into an orifice formed in an extension 106 of the tab 102. It is easy to understand that the screwing or unscrewing of the adjusting screw 104 causes a deformation of the intermediate piece 100, and therefore a displacement of the free end of the bimetallic strip 88 in approach or to separation of the trigger lever 86 in a manner well known to specialists. It should be noted that the fixing of the bimetallic strip 88 and of its adjustment device 104 is independent of the housing 10, the assembly being carried by the longer metal 32.
  • the terminal 26 is connected to the fixed contact 48, the fork 54 constituting a contact bridge cooperating respectively with the fixed contacts 48, 46.
  • the fixed contact 46 is connected to the input of the coil 68, the output of the latter being connected by a braid 108 to the free end of the bimetallic strip 88.
  • the plate 32 is connected to the terminal 28.
  • the circuit breaker according to the invention operates as follows: 1
  • the current enters at a given time via terminal 26 crossing contact 48, movable contact 52, fork 54, movable contact 50, contact 46, coil 68, bimetal strip 88 to exit through opposite terminal 28.
  • the contact-carrying fork 54 pivots in the open position by pulling two arcs, respectively between the contacts 46, 50 and 48, 52.
  • the arcs migrate on the electrodes 56, 58, to penetrate into the interrupting chambers 34, 36 where they are extinguished in the usual manner.
  • the coil 68 and the bimetallic strip 88 are shunted, the current passing from terminal 26, the electrode 58, the first arc, the movable contact 52, the fork 54, the movable contact 50, the second arc, the electrode 56, the lug 62, the plate 32 towards the output terminal 28.
  • the two arcs are connected in series and give the circuit breaker a high breaking capacity .
  • the rapid displacement of the contact-carrying fork 54 by a high-power electromagnetic trip device 64 contributes to the increase in breaking capacity.
  • the magnetic trip device 64 and the control mechanism 66 which are common to the two cut-off intervals, have the entire width of the housing 10, which facilitates their design.
  • the median plane, containing the insulating partition 30, constitutes a plane of symmetry of the circuit breaker.
  • the housing 10 can be made of thermoplastic material, a possible deformation of the housing 10 does not modify the adjustment of the bimetallic strip 88. It is clear that the use of the screen plate 32 as support for the bimetallic strip 88 can be used independently of the function for shunting magnetic and thermal trip devices, this function being either omitted or carried out by different means.
  • the screen plate can be made of a ferromagnetic material.
  • the movable contacts 50, 52 are advantageously made of a tellurium copper alloy and cooperate with fixed contacts 46, 48 made of copper. Tests have confirmed the effectiveness of this solution which saves the usual silver platelets.

Landscapes

  • Breakers (AREA)
EP19810401899 1980-12-09 1981-12-01 Disjoncteur miniature à haut pouvoir de coupure Expired EP0053973B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8026166 1980-12-09
FR8026166A FR2495826A1 (fr) 1980-12-09 1980-12-09 Disjoncteur miniature a haut pouvoir de coupure

Publications (2)

Publication Number Publication Date
EP0053973A1 EP0053973A1 (fr) 1982-06-16
EP0053973B1 true EP0053973B1 (fr) 1985-08-21

Family

ID=9248881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810401899 Expired EP0053973B1 (fr) 1980-12-09 1981-12-01 Disjoncteur miniature à haut pouvoir de coupure

Country Status (4)

Country Link
EP (1) EP0053973B1 (enExample)
DE (1) DE3171946D1 (enExample)
ES (1) ES8300415A1 (enExample)
FR (1) FR2495826A1 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517465B1 (fr) * 1981-11-27 1986-05-02 Merlin Gerin Disjoncteur miniature a deux chambres de coupure accolees
FR2592738B1 (fr) * 1986-01-03 1990-05-11 Merlin Gerin Disjoncteur electrique miniature a contact mobile multiple
JPH088048B2 (ja) * 1989-09-18 1996-01-29 三菱電機株式会社 限流装置
FR2674986B1 (fr) * 1991-04-08 1996-03-08 Hager Electro Disjoncteur unipolaire modulaire perfectionne et son procede de montage.
FR2703821B1 (fr) * 1993-04-07 1995-05-12 Merlin Gerin Disjoncteur électrique à répulsion électrodynamique des contacts et à chambres de coupure double.
EP0649155B1 (fr) * 1993-10-15 1997-04-02 Hager Electro S.A. TÔle de conduction double pour chambre de conduction d'arc de disjoncteur
FR2768856B1 (fr) * 1997-09-24 1999-11-12 Schneider Electric Sa Disjoncteur a declencheur electromagnetique a propulseur d'un contact mobile a fourche
IT1318215B1 (it) * 2000-07-21 2003-07-28 Gewiss Spa Interruttore elettrico magnetotermico
US8912461B2 (en) 2012-01-23 2014-12-16 General Electric Company Arc chute assembly and method of manufacturing same
FR2996678B1 (fr) 2012-10-05 2014-10-31 Schneider Electric Ind Sas Dispositif de commande d'un appareil de protection electrique et appareil de protection electrique le comportant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180453B (de) * 1962-08-07 1964-10-29 Continental Elektro Ind Ag Selbstschalter, insbesondere Installations-selbstschalter
CH409092A (it) * 1964-04-11 1966-03-15 Bassani Spa Interruttore automatico magnetotermico
DE1538677A1 (de) * 1966-07-08 1970-02-19 Licentia Gmbh Mechanismus fuer Selbstschalter
CH543174A (de) * 1971-09-30 1973-10-15 Carl Maier & Cie Elek Sche Sch Leitungsschutzschalter
DE2234423A1 (de) * 1972-07-13 1974-01-24 Bbc Brown Boveri & Cie Installationsselbstschalter in schalenbauweise
FR2204872B1 (enExample) * 1972-10-30 1976-08-20 Legrand Sa
FR2344949A1 (fr) * 1976-03-15 1977-10-14 Merlin Gerin Disjoncteur miniature basse tension

Also Published As

Publication number Publication date
FR2495826A1 (fr) 1982-06-11
ES507719A0 (es) 1982-11-01
ES8300415A1 (es) 1982-11-01
EP0053973A1 (fr) 1982-06-16
DE3171946D1 (en) 1985-09-26
FR2495826B1 (enExample) 1984-02-03

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