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EP0337900B1 - Elektromagnetischer Auslöser mit hoher Empfindlichkeit - Google Patents

Elektromagnetischer Auslöser mit hoher Empfindlichkeit Download PDF

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Publication number
EP0337900B1
EP0337900B1 EP89420102A EP89420102A EP0337900B1 EP 0337900 B1 EP0337900 B1 EP 0337900B1 EP 89420102 A EP89420102 A EP 89420102A EP 89420102 A EP89420102 A EP 89420102A EP 0337900 B1 EP0337900 B1 EP 0337900B1
Authority
EP
European Patent Office
Prior art keywords
base
trip device
armature
cover
electromagnetic trip
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
EP89420102A
Other languages
English (en)
French (fr)
Other versions
EP0337900A1 (de
Inventor
Michel Bonniau
Marc Paupert
Régis Renel
Alain Karczewski
Jacques Vallot
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 EP0337900A1 publication Critical patent/EP0337900A1/de
Application granted granted Critical
Publication of EP0337900B1 publication Critical patent/EP0337900B1/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
    • 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
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/325—Housings, assembly or disposition of different elements in the housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques

Definitions

  • the invention relates to an electromagnetic trip device with magnetic latching, in particular for a differential switch or circuit breaker, having an insulating housing consisting of a base and an open bottom cover snapping onto the base to form a closed housing. , inside which are housed a U-shaped frame, the ends of the two legs of which constitute two co-planar pole surfaces, a pivoting pallet on the end of one of said two legs of the frame and coming in the armed position of the trigger sticking to said two pole surfaces to close the magnetic circuit formed by the armature and the paddle, a permanent magnet for polarizing the magnetic circuit and a trigger coil surrounding the other of said two legs of the armature and having a carcass with lower face attached to the base of the frame and snapped onto the base.
  • the documents FR-A-2,095,278 and DE-A-3,631,405 describe a trigger of the kind mentioned, in which the elements of the trigger are housed in a housing constituted by a base and a cover snapped onto the base. On one of the legs of the frame is threaded the carcass of the coil and on the other a fixing piece which in combination with the carcass is snapped onto the base. The base of the frame is interposed between the carcass and a permanent magnet housed in a recess in the base.
  • an elastic washer is also interposed between the magnet and the bottom of the recess, the armature being thus resiliently held in the housing. This fixation is complicated.
  • the manufacture and mounting of very high sensitivity electromagnetic trip devices of the kind mentioned must be particularly careful in order to obtain high trigger accuracy.
  • the object of the present invention is to produce a simplified trip device the mounting of which is easier and is likely to be partially or entirely automated.
  • the electromagnetic trip device according to the invention comprises the elements set out in claim 1.
  • the trigger elements are fixed on the one hand by the snap-fastening of the coil carcass on the base and on the other hand by the support of the cover on this carcass. Locking by the cover ensures proper fixing and positioning of the trigger elements inside the housing.
  • This fixing is effected by simple snaps which can be carried out by automatic assembly machines.
  • the cover has a generally parallelepiped shape with means for fixing the trigger.
  • One of the fixing means is constituted by a beveled angle of the upper face allowing to remain on the edges, two perforated ears allowing the passage of a fixing axis.
  • the two angles are preferably bevelled for fixing by the two edges of the upper face of the cover.
  • the cover advantageously has additional fixing means constituted by lugs carried by the small side faces in a manner well known to specialists.
  • the two large side faces of the cover may have steps for fixing by snap-fastening to secure the trigger to a support carrying snap-on spouts.
  • a return spring of the pallet is anchored at one of its ends by an adjustment screw screwed into the turns of the spring.
  • the screw performs the dual function of holding and adjusting the spring return force.
  • the head of the adjustment screw is supported on a lug secured to the frame of the trigger by inserting into a notch formed in this lug.
  • the relay boxes with very high sensitivity must be dust-tight and according to a development of the invention, the snap-fit lugs of the base on the cover are shaped to close the openings in which these lugs engage.
  • the orifices are advantageously circular in shape and the ends of the spouts are in the form of cylindrical pins snapping into these orifices.
  • the permanent magnet for biasing the armature is disposed between the legs of this armature and is held by the carcass of the coil which for this purpose has extensions provided with cutouts through which the permanent magnet passes.
  • the assembly is particularly simple and the assembly is carried out by simple stacking and latching of the parts one on the other.
  • the cover and the base are advantageously made of plastic material loaded with magnetic particles, in particular iron, to form a magnetic screen against external disturbances.
  • This magnetic protection can be reinforced or produced by an external magnetic screen, which fits, for example, on the cover and the base.
  • the magnetic circuit of a high-sensitivity electromagnetic trip device consists of a U-shaped frame 10 and a pivoting pallet 12.
  • the pallet 12 is articulated on the end of one of the legs 14, 16 of the frame 10 and in the armed position of the trigger, the pallet 12 is applied to the ends of the legs 14, 16 constituting two polar surfaces.
  • On the branch 16 of the frame 10 is threaded a carcass 18 of a coil 20.
  • a permanent magnet 22 for biasing the frame 10 is interposed between the legs 14, 16 to maintain the pallet 12 in the position attracted to the against the restoring force of a coil spring 24.
  • the assembly is housed inside a housing constituted by a base 26 and a cover 28 covering the base 26. The upper face of the cover 28 is crossed by a control pin 30 bearing on the pallet 12.
  • Such a trigger is well known and it suffices to recall that the release of the pallet is caused by an excitation of the coil 20 canceling the attraction of the pallet 12 by the permanent magnet 22.
  • the coil 20 is surrounded by lower 32 and upper 34 flanges (faces) of the carcass 18, these flanges (faces) being extended to form support elements for the permanent magnet 22 which passes through orifices 36, 38, formed in the extensions of these flanges 32, 34.
  • the underside of the flange 32 is supported on the base of the frame 10 and has two slots 46, 48 in which engage snap-fit spouts 42, 44 carried by the base 26 In the latched position, the carcass 18 maintains the base of the frame 10 in abutment on the base 26 and positions the permanent magnet 22.
  • the cover 28 fits on the base 26 by snapping onto four spouts 50 provided at the four corners of the rectangular base.
  • the upper face of the base 28 carries internal bosses 52 which come to bear on the upper face of the upper flange 34 of the carcass 18 in the snap-on position of the cover, in order to lock this carcass on the base 26.
  • the carcass 18 also carries pins centering 54 engaging in conjugate holes in the base 26.
  • the return spring 24 is a coil tension spring, one end 56 of which is anchored to the pallet 12 and the other end 58 of which is anchored by an adjustment screw 60 to a lug 62 secured to the frame 10
  • the screw 60 is engaged in a notch 64 of the tab 62, the head 66 of the screw 60 resting on the edges of this notch 64 and the threaded part of the screw 60 both screwed into the turns of the spring 24.
  • the adjustment is effected by a rotation of the head 66 causing the threaded part of the screw 60 to penetrate into the spring 24.
  • the base 26 has, opposite the head 66, an orifice 68 for access to the screw 60.
  • the cover 28 of generally parallelepiped shape has on its two small side faces 70, 72 of the fixing lugs perforated 74, 76, allowing the trigger to be supported and fixed by screws passing through the legs 74, 76.
  • the upper corners of the small lateral faces 70, 72 have bevels (heels) 78, 80 which allow lateral extensions to remain.
  • the cover 28 comprises a third fixing means constituted by conjugate steps of the bosses 52.
  • the ends of the snap-fit spouts 50 carried by the base 26 have a rounded shape engaging and closing off circular orifices provided in the cover 28. This shape of the latching spouts contributes to the sealing of the housing by limiting the penetration of dust or other impurities.
  • the base 26 carries two pins 87 to which the wires of the coil 20 are welded.
  • the mounting of the trigger according to the invention is particularly simple.
  • This assembly is secured to the base 26 by simple snap-fitting of the spouts 42, 44, into the slots 46, 48 taking care to correctly position the centering pins 54.
  • This snap-fastening fixes the elements of the trigger to the rigid base 26 while allowing access to the adjustment screw 66 through the orifice 68 of the base.
  • the cover 28 is fitted and snapped onto the base 26 and the bosses 52 come to bear on the carcass 18 to lock the latter.
  • the housing can be fixed to a support, for example to a differential circuit breaker, either by the lateral fixing lugs 74, 76, or by the axes passing through the perforated ears 82, 84, or by a snap-fastening on the steps opposite the bosses 52
  • the different means of fixing the housing can be used separately or in combination.
  • the adjustment of the return force of the spring 24 by a simple rotation of the screw 60 ensures a great precision of adjustment while avoiding any untimely rotation of the screw 60 thanks to the self-tightening effect of the turns of the spring on the screw thread.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Magnetic Treatment Devices (AREA)

Claims (10)

  1. Elektromagnetischer Auslöser mit magnetischer Haltung, insbesondere für einen Lasttrenn- oder Leistungsschalter mit Differenzstromschutz, mit einem Isolierstoffgehäuse, das aus einem Sockel (26) und einem auf dem Sockel (26) zur Bildung eines geschlossenen Gehäuses aufgeschnappten nach unten offenen Gehäuseoberteil (28) besteht, und in dessen Innerem ein U-förmiger Eisenkern (10), dessen beide Schenkel (14, 16) an ihren Enden zwei in einer Ebene liegenden Polflächen bilden, ein um das Ende eines (14) der beiden genannten Schenkel (14, 16) des Eisenkerns (10) verschwenkbarer Kippanker (12), der in der Gespannt-Stellung des Auslösers auf den genannten Polflächen aufliegt, um den aus dem Eisenkern (10) und dem Anker (12) bestehenden Magnetkreis zu schließen, ein Dauermagnet (22) zur Polarisierung des genannten Magnetkreises sowie eine Auslösespule (20), die den anderen (16) der beiden genannten Schenkel (14, 16) umgibt und einen Spulenkörper (18) aufweist, dessen Unterseite (32) auf dem Querjoch des Eisenkerns (10) aufliegt und auf dem Sockel (26) aufgeschnappt ist, dadurch gekennzeichnet, daß das Querjoch des Eisenkerns (10) zwischen der Unterseite des Spulenkörpers (18) und dem Sockel (26) eingeklemmt und somit gegen diesen Sockel (26) gedrückt wird, daß das Gehäuseoberteil (28) Vorsprünge (52) aufweist, die beim Aufstecken des Gehäuseoberteils gegen die Oberseite (34) des Spulenkörpers (18) drücken, um den Eisenkern (10) und den Spulenkörper (18) im Gehäuseinnern zu positionieren und zu verriegeln, und daß der Dauermagnet (22) zwischen den Schenkeln (14, 16) des Eisenkerns (10) angeordnet ist und durch die Verlängerungen der genannten Oberseite (34) und Unterseite (32) des Spulenkörpers (18) der Spule (20) gehalten wird.
  2. Elektromagnetischer Auslöser nach Anspruch 1, dadurch gekennzeichnet, daß das genannte kastenförmige Gehäuseoberteil (28) an der der genannten offenen Unterseite gegentiberliegenden Seite eine Stufe (78, 80) aufweist, aus der zwei Ösen (82, 84) hervorstehen, die mit ihren Bohrungen auf eine Befestigungsstange geschoben werden können.
  3. Elektromagnetischer Auslöser nach Anspruch 2, dadurch gekennzeichnet, daß die beiden Kanten der genannten Gegenseite jeweils eine Stufe (78, 80) aufweisen, aus der zwei Ösen (82, 84) hervorstehen.
  4. Elektromagnetischer Auslöser nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die beiden Schmalseiten (70, 72) des Gehäuseoberteils (28) jeweils eine seitlich aus dem Gehäuse hervorstehende Befestigungsstütze (74, 76) aufweisen.
  5. Elektromagnetischer Auslöser nach Anspruch 1, 2 3 oder 4, dadurch gekennzeichnet, daß die beiden breiten Seitenflächen des Gehäuseoberteils (28) jeweils einen Befestigungsabsatz zur Schnappmontage aufweisen.
  6. Elektromagnetischer Auslöser nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kippanker (12) durch eine Rückhol-Schraubenfeder (24) beaufschlagt wird, deren erstes Ende (56) durch eine in die Windungen der Feder (24) eingedrehte Einstellschraube (60) befestigt ist.
  7. Elektromagnetischer Auslöser nach Anspruch 6, dadurch gekennzeichnet, daß die Feder (24) zwischen dem Kippanker (12) und dem Sockel (26) angeordnet und die Einstellschraube (60) durch eine im Sockel ausgebildete Öffnung (68) zugänglich ist.
  8. Elektromagnetischer Auslöser nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß der Kopf (66) der Einstellschraube (60) in einer Aussparung (64) liegt, die in einer fest mit dem Eisenkern (10) verbundenen seitlichen Stütze (62) eingearbeitet ist und den Schraubenkopf stützt.
  9. Elektromagnetischer Auslöser nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Sockel (26) Schnappnasen (50) aufweist, die mit im Gehäuseoberteil (28) ausgebildeten Schnappöffnungen zusammenwirken, und daß die Enden der genannten Schnappnasen eine an die Form der Öffnungen angepaßte Form aufweisen, um diese Öffnungen bei geschlossenem Gehäuse abzudecken.
  10. Elektromagnetischer Auslöser nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Isolierstoffgehäuse aus einem Kunststoff besteht, in den Magnetteilchen zur Bildung einer magnetischen Abschirmung eingearbeitet sind.
EP89420102A 1988-04-14 1989-03-23 Elektromagnetischer Auslöser mit hoher Empfindlichkeit Expired - Lifetime EP0337900B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805063A FR2630256B1 (fr) 1988-04-14 1988-04-14 Declencheur electromagnetique a haute sensibilite
FR8805063 1988-04-14

Publications (2)

Publication Number Publication Date
EP0337900A1 EP0337900A1 (de) 1989-10-18
EP0337900B1 true EP0337900B1 (de) 1994-06-01

Family

ID=9365375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420102A Expired - Lifetime EP0337900B1 (de) 1988-04-14 1989-03-23 Elektromagnetischer Auslöser mit hoher Empfindlichkeit

Country Status (5)

Country Link
EP (1) EP0337900B1 (de)
AT (1) ATE106604T1 (de)
DE (1) DE68915607T2 (de)
ES (1) ES2057169T3 (de)
FR (1) FR2630256B1 (de)

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Also Published As

Publication number Publication date
DE68915607T2 (de) 1994-10-20
ATE106604T1 (de) 1994-06-15
EP0337900A1 (de) 1989-10-18
ES2057169T3 (es) 1994-10-16
DE68915607D1 (de) 1994-07-07
FR2630256B1 (fr) 1995-06-23
FR2630256A1 (fr) 1989-10-20

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