EP0027404A1 - Elektrischer Miniaturschutzschalter mit gegossenem Gehäuse - Google Patents

Elektrischer Miniaturschutzschalter mit gegossenem Gehäuse Download PDF

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Publication number
EP0027404A1
EP0027404A1 EP80401404A EP80401404A EP0027404A1 EP 0027404 A1 EP0027404 A1 EP 0027404A1 EP 80401404 A EP80401404 A EP 80401404A EP 80401404 A EP80401404 A EP 80401404A EP 0027404 A1 EP0027404 A1 EP 0027404A1
Authority
EP
European Patent Office
Prior art keywords
core
sheath
circuit breaker
plunger
coil
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
EP80401404A
Other languages
English (en)
French (fr)
Other versions
EP0027404B1 (de
Inventor
Jean Barral-Baron
Michel Lazareth
François Reynaud
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
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0027404A1 publication Critical patent/EP0027404A1/de
Application granted granted Critical
Publication of EP0027404B1 publication Critical patent/EP0027404B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • 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
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/083—External yoke surrounding the coil bobbin, e.g. made of bent magnetic sheet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5855—Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut
    • H01H2001/5861—Box connector with a collar or lug for clamping internal rail and external conductor together by a tightening screw
    • 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

Definitions

  • Circuit breakers of the type mentioned are known (French patents Nos. 2,344,949 and 2,344,950), which advantageously replace protection fuses in low voltage circuits for the distribution of electrical energy. These circuit breakers are mass produced and the present invention aims to reduce their manufacturing cost and increase their performance, in particular the breaking capacity.
  • the plunger core of the electromagnetic trip unit exerts traction on the movable contact to accelerate its movement and increase the speed of breaking of the arc drawn between the contacts.
  • the purpose of the present invention is to increase the speed of response and the action of the electromagnetic trip device and it is characterized in that the said plunger core has passages on its periphery for compressed air through the piston effect generated during rapid displacement of the plunger core inside the sheath, and is shaped to allow a limited pivoting movement of the core inside the sheath during the opening stroke of the pivoting movable contact.
  • the air passages provided on the plunger core prevent braking by piston effect and the barrel shape allows limited pivoting inside the sleeve and compensates for variations in positioning during pivoting of the movable contact.
  • the fixed core of the electromagnetic trip device is secured to the carcass by a circlip extending by an elastic blade acting on the latch of the circuit breaker mechanism.
  • the same part performs the double function of locking the fixed core and of recalling the lock, which allows a reduction in the cost of manufacturing and mounting the circuit breaker.
  • the arrangement of the elements constituting the electromagnetic trip device inside a sheath lends itself to a simplification of the assembly by providing according to another development of the invention a snap-fastening of the sheath on the fixed core after insertion of the plunger core and the spring of reminder inside the sheath. This snap-fastening maintains the assembled elements which can subsequently be placed inside the release coil in a single block.
  • the current supply lines of the fixed and mobile contacts are shaped man.ière to increase the loop effect and blowing magnetic arc toward the arc chute .
  • the connection conductor of the fixed contact to the connection area bypasses the terminal clamp by making a loop oriented in the direction of the front face carrying the handle of the circuit breaker. This increase in the loop effect is obtained without increasing the external dimensions of the molded housing by particularly simple means.
  • a pole of a miniature electric circuit breaker comprises a housing 10 made of a molded insulating material having on the front face 12 a handle 14 for operating the circuit breaker and on the two narrow lateral faces of the connection terminals 16, 18 of breaker input and output.
  • a movable contact 20 and a fixed contact 22 Inside the housing 10 are housed a movable contact 20 and a fixed contact 22, connected by a loop conductor 24 to the terminal 16.
  • the movable contact 20 is controlled by a control mechanism which will be described in detail below.
  • a thermal trip device formed by a bimetallic strip 26 and an electromagnetic trip device 28 capable of causing in the event of an overload or short circuit an automatic opening of the contacts 20, 22.
  • a breaking chamber 30 constituted by a stack of sheets 32 which extend parallel to the face rear 34 of the housing 10.
  • Fixing claws 36, integral with the rear face 34, are capable of cooperating with a symmetrical DIN rail for support in a manner well known to specialists.
  • the movable contact 20 extends substantially perpendicular to the plane of the sheets 32, so as to draw an arc between the contacts 20, 22 during their separation, the initial direction of which is substantially parallel to the sheets 32.
  • the connection conductor 24 is extended beyond the fixed contact 22 to constitute an electrode or arc ring 38, which ends with a plate delimiting the breaking chamber 30..
  • the opposite side of the breaking chamber 30. is delimited by an electrode 40, electrically connected as described below to the output terminal 18.
  • the mechanism for controlling the mobile contact 20 is described in detail in French Patent No. 2,344,949, and will only be summarized hereinafter.
  • the movable contact 20 is articulated on a contact arm 44 pivotally mounted on a rocker arm 46 attacked by a toggle switch 48, one of the links of which is formed by an extension 50 of the lever 14.
  • a pivoting of the lever 14 causes the extension or breaking of the toggle joint 48 and by pivoting of the rocker arm 46 the spacing or the bringing together of the movable contact 20 of the fixed contact 22.
  • a trigger lever 52 pivotally mounted on an axis 54, cooperates with the end 56 of the contact arm 44, so as to secure the latter to the rocker arm 46.
  • a latch 58 is rotatably mounted on a pivot 60 and has a nose 62 for hooking the end of the trigger lever 52.
  • the trip lever 52 In the locking position, shown in fig. l, the trip lever 52 is retained by the latch 58 in the active position allowing transmission of the pivoting movement of the lever 14 to the movable contact 20 for manual control of opening and closing of the circuit breaker.
  • An automatic opening of the contacts 20, 22 is caused by a pivoting in the direction of the needles of a watch of the lock 58, which releases the trigger lever 52, the latter pivoting in the trigonometric direction to release the end 56 of the contact arm 44. Under the action of a spring (not shown) the arm of contact pivots to the open position.
  • the latch 58 is actuated by the deflection of the bimetallic strip 26 in the event of an overload and by the electromagnetic trip device 28 when a short circuit appears.
  • the electromagnetic trip device 28 comprises a carcass 64 made of a ferromagnetic material which surrounds a coil 68 mounted on a tubular insulating sheath 70 closed at one of its ends by a bottom 72 Inside the sheath in the form of an insulating sleeve 70 is slidably mounted a plunger core 74 and a fixed magnetic core 76.
  • the general shape of the plunger core 74 is that of a barrel or an ogive whose cross section median is in the form of a square with rounded edges 78 (see fig. 4).
  • the edges 78 constitute guide lines in contact with the internal wall of the sheath 70, the intervals remaining between the sides of the square of the plunger core 74 and the periphery of the sheath 70 delimiting orifices of air passage. It is easy to understand that the plunger core 74 acting like a piston moving in the cylinder 70 is not braked in its movement by the compression of air which can escape freely through the intervals formed between the piston and the cylinder.
  • the conical shape of the plunger core 74 allows limited pivoting inside the sheath 70.
  • the plunger core 74 To the plunger core 74 is secured an actuating rod 80, which passes through an orifice formed in the bottom 72 of the sheath 70 and cooperates with the contact arm 44.
  • the plunger core 74 cooperates on its opposite side with a pusher 82, which passes through an orifice 84 formed in the fixed core 76 and is urged to bear against the plunger core 74 by a spring 86.
  • the end of the pusher 82 cooperates with latch 58 to move the latter in position unlocking during an excitation of the electromagnetic trip device 28.
  • the fixed core 76 has on its outer periphery cells 88 in which snap in position assembled bosses 90 formed on the sheath 70.
  • the fixed core 76 also has a collar 91 passing through an orifice 92 formed in the carcass 64 and receiving a retaining circlip 94, so as to rigidly secure the fixed core 76 to the carcass 64.
  • the circlip 94 is constituted by the end of a leaf spring 96 in the form hairpin whose opposite end cooperates with the lock 58 to urge the latter in the locked position.
  • the coil 68 is electrically connected on the one hand by a braid 98 to the movable contact 20, and on the other hand by a braid 100 to the bimetallic strip 26 whose opposite end is fixed to the carcass 64, itself connected to the terminal 18.
  • the plate 40 delimiting the breaking chamber 30 is fixed to the carcass 64 on the side of the contact arm 44. It is easy to understand that in the closed position of the contacts 20 ; 22, the current flows from terminal 16 through contacts 22, 20, the braid 98, the coil 68, the braid 100, the bimetallic strip 26 towards terminal 18. In the event of an overload or short-circuit, the latch 58 is actuated respectively by the bimetallic strip 26 or the electromagnetic trip 28, so as to cause the automatic opening of the contacts 20, 22.
  • the arc drawn between the separate contacts 20, 22 moves along the horn 38 and switches on the plate 40 by switching off the coil 68 and the bimetallic strip 26 in a manner well known to specialists.
  • the more particularly square polygonal section of the plunger core 74 avoids any piston effect capable of slowing the movement of the plunger core 74.
  • the pointed shape of the plunger core 74 allows pivoting and therefore inclination of the rod actuator 80 which is positioned to exert on the movable contact 20 a tensile force in the direction of opening of the movable contact 20.
  • the terminal 16 adjacent to the fixed contact 22 is of the type embedded inside the housing 10 and includes a stirrup 104 surrounding a pad 106 formed by the end of the conductor 24 carrying the fixed contact 22.
  • the upper branch 108 of the bracket 104 has a threaded bore receiving a clamping screw 110 bearing on the upper face of the connection pad 106.
  • Such terminals are well known per se and it is easy to understand that during the screwing of the screw 110 a conductor 112 inserted between the stirrup 104 and the pad 106, is clamped against the latter.
  • the pad 106 is substantially at the level of the fixed contact 22 and the connection conductor 24 extends inside the socket 114 for housing the terminal 16, bypassing the upper edge 108 of the stirrup 104, such so that the arc drawn between the contacts 20, 22 is from its appearance subjected to an intense loop effect.
  • the screw 110 passes through an orifice formed in the upper part of the loop formed by the conductor 24.
  • the stirrup 104 provided with its screw 110 is mounted on the fixed contact 22.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
EP19800401404 1979-10-16 1980-10-03 Elektrischer Miniaturschutzschalter mit gegossenem Gehäuse Expired EP0027404B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7925859A FR2468202B1 (fr) 1979-10-16 1979-10-16 Disjoncteur electrique miniature a boitier moule
FR7925859 1979-10-16

Publications (2)

Publication Number Publication Date
EP0027404A1 true EP0027404A1 (de) 1981-04-22
EP0027404B1 EP0027404B1 (de) 1984-07-18

Family

ID=9230787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800401404 Expired EP0027404B1 (de) 1979-10-16 1980-10-03 Elektrischer Miniaturschutzschalter mit gegossenem Gehäuse

Country Status (4)

Country Link
EP (1) EP0027404B1 (de)
DE (1) DE3068610D1 (de)
ES (1) ES8105890A1 (de)
FR (1) FR2468202B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168596A2 (de) * 1984-06-13 1986-01-22 Asea Brown Boveri Aktiengesellschaft Anschlussklemme und Verfahren zur Herstellung einer Anschlussklemme
WO1987004850A1 (en) * 1986-01-31 1987-08-13 Jakob Rothenberger Multi-chamber magnetic distributing valve
AU579677B2 (en) * 1984-11-02 1988-12-01 Heinemann Electric (South Africa) Limited Circuit breaker
EP0335774A1 (de) * 1988-03-30 1989-10-04 Hager Electro S.A. Auslösemagnet für einen Leistungsschalter
EP0477746A2 (de) * 1990-09-27 1992-04-01 Hella KG Hueck & Co. Elektrischer Hubankermagnet, insbesondere für Kraftfahrzeuge
EP0537090A1 (de) * 1991-10-10 1993-04-14 Schneider Electric Sa Elektrischer Schützschalter mit Einfügung von zusätzlichen Windungen im Magnetauslöser
WO1995017000A1 (en) * 1993-12-15 1995-06-22 United Technologies Automotive, Inc. Solenoid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030453A1 (de) * 2008-06-26 2010-01-14 Hydac Electronic Gmbh Betätigungsvorrichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291599A (en) * 1939-12-16 1942-08-04 William A Ray Solenoid
GB576775A (en) * 1942-12-21 1946-04-18 Landis & Gyr Sa Improvements in automatic circuit breakers
DE1173582B (de) * 1963-04-18 1964-07-09 Licentia Gmbh Magnetisches Ausloesesystem fuer Schaltgeraete
US3295079A (en) * 1964-12-03 1966-12-27 Honeywell Inc Solenoid actuator assembly having a unitary spring clip for the plunger
DE1564088A1 (de) * 1966-09-22 1970-01-15 Erich Herion Wechselstrommagnet mit einem teilweise in den Hohlraum der Magnetspule hineinragenden Magnetkern und einem die Magnetspule umgebenden Joch,insbesondere fuer Magnetventile zur Steuerung von durch Druckluft betaetigten Vorrichtungen
US3727160A (en) * 1972-03-24 1973-04-10 Automatic Switch Co Retaining clip for a solenoid assembly
DE2330839A1 (de) * 1973-06-16 1975-01-09 Harting Elektro W Ankerlagerung in elektro-kolbenhubmagneten
DE2531215A1 (de) * 1975-07-12 1977-02-03 Bbc Brown Boveri & Cie Magnetischer ausloeser
FR2344949A1 (fr) * 1976-03-15 1977-10-14 Merlin Gerin Disjoncteur miniature basse tension

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2291599A (en) * 1939-12-16 1942-08-04 William A Ray Solenoid
GB576775A (en) * 1942-12-21 1946-04-18 Landis & Gyr Sa Improvements in automatic circuit breakers
DE1173582B (de) * 1963-04-18 1964-07-09 Licentia Gmbh Magnetisches Ausloesesystem fuer Schaltgeraete
US3295079A (en) * 1964-12-03 1966-12-27 Honeywell Inc Solenoid actuator assembly having a unitary spring clip for the plunger
DE1564088A1 (de) * 1966-09-22 1970-01-15 Erich Herion Wechselstrommagnet mit einem teilweise in den Hohlraum der Magnetspule hineinragenden Magnetkern und einem die Magnetspule umgebenden Joch,insbesondere fuer Magnetventile zur Steuerung von durch Druckluft betaetigten Vorrichtungen
US3727160A (en) * 1972-03-24 1973-04-10 Automatic Switch Co Retaining clip for a solenoid assembly
DE2330839A1 (de) * 1973-06-16 1975-01-09 Harting Elektro W Ankerlagerung in elektro-kolbenhubmagneten
DE2531215A1 (de) * 1975-07-12 1977-02-03 Bbc Brown Boveri & Cie Magnetischer ausloeser
FR2344949A1 (fr) * 1976-03-15 1977-10-14 Merlin Gerin Disjoncteur miniature basse tension

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168596A2 (de) * 1984-06-13 1986-01-22 Asea Brown Boveri Aktiengesellschaft Anschlussklemme und Verfahren zur Herstellung einer Anschlussklemme
EP0168596A3 (en) * 1984-06-13 1988-11-17 Asea Brown Boveri Aktiengesellschaft Connecting clamp and method of making a connecting clamp
AU579677B2 (en) * 1984-11-02 1988-12-01 Heinemann Electric (South Africa) Limited Circuit breaker
WO1987004850A1 (en) * 1986-01-31 1987-08-13 Jakob Rothenberger Multi-chamber magnetic distributing valve
EP0335774A1 (de) * 1988-03-30 1989-10-04 Hager Electro S.A. Auslösemagnet für einen Leistungsschalter
FR2629633A1 (fr) * 1988-03-30 1989-10-06 Hager Electro Declencheur magnetique pour disjoncteur
EP0477746A2 (de) * 1990-09-27 1992-04-01 Hella KG Hueck & Co. Elektrischer Hubankermagnet, insbesondere für Kraftfahrzeuge
EP0477746A3 (en) * 1990-09-27 1993-01-20 Hella Kg Hueck & Co. Electromagnetic actuator, especially for motor vehicles
EP0537090A1 (de) * 1991-10-10 1993-04-14 Schneider Electric Sa Elektrischer Schützschalter mit Einfügung von zusätzlichen Windungen im Magnetauslöser
FR2682533A1 (fr) * 1991-10-10 1993-04-16 Merlin Gerin Disjoncteur electrique a insertion de spires du declencheur magnetique.
WO1995017000A1 (en) * 1993-12-15 1995-06-22 United Technologies Automotive, Inc. Solenoid
US5546064A (en) * 1993-12-15 1996-08-13 United Technologies Automotive, Inc. Solenoid with plunger rod

Also Published As

Publication number Publication date
ES495920A0 (es) 1981-06-16
EP0027404B1 (de) 1984-07-18
ES8105890A1 (es) 1981-06-16
FR2468202B1 (fr) 1986-03-07
DE3068610D1 (en) 1984-08-23
FR2468202A1 (fr) 1981-04-30

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