EP0333650B1 - Transmission de force dans un déclencheur électromagnétique d'un disjoncteur de montage - Google Patents

Transmission de force dans un déclencheur électromagnétique d'un disjoncteur de montage Download PDF

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Publication number
EP0333650B1
EP0333650B1 EP89810164A EP89810164A EP0333650B1 EP 0333650 B1 EP0333650 B1 EP 0333650B1 EP 89810164 A EP89810164 A EP 89810164A EP 89810164 A EP89810164 A EP 89810164A EP 0333650 B1 EP0333650 B1 EP 0333650B1
Authority
EP
European Patent Office
Prior art keywords
spring
armature
accordance
flange
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
EP89810164A
Other languages
German (de)
English (en)
Other versions
EP0333650A1 (fr
Inventor
Stephan Spengler
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Priority to AT89810164T priority Critical patent/ATE89949T1/de
Publication of EP0333650A1 publication Critical patent/EP0333650A1/fr
Application granted granted Critical
Publication of EP0333650B1 publication Critical patent/EP0333650B1/fr
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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection

Definitions

  • the invention relates to a method for transmitting power in the electromagnetic release system of an installation built-in switch of electrical low-voltage distribution networks which switches off in the event of overcurrent, in particular a motor protection switch, the release system acting on a switch lock essentially comprising a yoke, a core, a coil, a coil body, a displaceable armature and includes an armature spring returning the armature when the strong overcurrent is interrupted.
  • the invention further relates to a device for performing the method.
  • Electrical tripping systems of installation built-in switches serve among other things to immediately switch off the circuit monitored by the switch at an overcurrent or short circuit 10 to 15 times greater than the nominal current.
  • the armature is drawn into the coil body by means of the magnetic field generated by the coil.
  • the retracting movement of the armature is used by mechanical means to separate the contacts pressed together by spring force. After the contacts have been separated, the electromagnetic field is reduced and a return element pulls the anchor back into the rest position.
  • the inventors have set themselves the task of creating a method and a device of the type mentioned at the outset which simplify the transmission of force in an electromagnetic release system, allow the production costs to be reduced and work with greater operational reliability.
  • the object is achieved according to the invention by moving the armature over a first spring leg of the coil spring, which is designed as a helical spring and is mounted at the other end in a rotationally fixed manner by means of a second spring leg, is transmitted directly to a trigger slide for actuating the switch lock.
  • the key switch can be operated with very little effort thanks to the smooth-running trigger slide.
  • the key switch in turn releases the spring forces stored by means of the manual actuation of the switch lever, the circuit is interrupted.
  • the release system can be designed such that not only the armature movement of the electromagnetic release, but also the movement of the bimetal and possibly the undervoltage release is transmitted to the same release slide.
  • the second spring leg is preferably used for pretensioning. In this way, the return force can be set at given spring constants.
  • Preloading the armature spring with various setting options allows adaptation to different response values of the electromagnetic release system.
  • the armature spring should hold back the armature up to a certain overcurrent, in practice up to 10 - 15 times the nominal current.
  • the pretensioning is preferably carried out by latching the bent second spring leg in one of the different positions.
  • the object is achieved according to the invention in that the first spring leg of the armature spring connected to the armature has means for direct transmission of the armature movement, at least in the direction of the core of the electromagnetic release system, and a release slide actuating the switch lock for receiving the movement transmitted by the first spring leg.
  • the coil former is preferably designed such that the armature spring can be accommodated in a bearing housing formed on one side. Before mounting the anchor spring, the bearing housing is open. The spring is wound on a mandrel or placed in a trough and the plastic bearing housing is subsequently closed.
  • the electromagnetic release system is arranged on an angled housing rib 10 of a motor protection switch.
  • a yoke 12 with an opening for an essentially sleeve-shaped core 14, which in turn is anchored in the housing rib 10 across the bottom of the yoke 12.
  • a coaxial bobbin 16 is wound over the core 14, on which the coil 18 is wound in order to generate the magnetic field.
  • the same molded part made of plastic includes the bearing housing 21 for the helical anchor spring 22, which is arranged on a mandrel or, as in the present case, in a correspondingly shaped depression 24 of the bearing housing 21.
  • a first spring leg 26 of the armature spring 22 runs approximately tangentially away from the spring, is bent over for the first time and runs in the direction of the axis L of the armature spring 22.
  • the length a (FIG. 3) of the piece 27 of the spring extending outside the spring in the direction L.
  • the first spring leg 26 is about 2-6 mm in conventional installation built-in switches.
  • this piece can be semicircular or the like.
  • the first spring leg 26 runs in the direction of the armature 28, which can be displaced in the longitudinal direction in the coil former 16 along the axis A.
  • the armature 28 has a deeply cut annular groove 32 in the region of the armature head 30. The end of the first spring leg 26 is looped around the neck of the armature 28 in this annular groove.
  • the first spring leg 26 is also carried along. As a result, the armature spring 22 also rotates, decreasing in the direction L away from the first spring leg 26.
  • the armature spring 28 is secured against rotation on the second spring leg 36.
  • This second spring leg 36 which also runs tangentially from the spring, is bent in the direction of the spring axis L, pointing away from the armature spring 22.
  • the free end of the second spring leg 36 rests on a web 38 integrally formed on the bearing housing 21.
  • This web 38 viewed in the direction L from the right, is in the form of a segment of a circle and has grooves 40 for latching the free end of the second spring leg 36.
  • Fig. 1 shows the armature 28 in the position distant from the core 14 in the coil body 16, the rest position R. If an overcurrent flows through the coil 18 and generates a magnetic field, the armature 28 is pulled up to the core 14 into the coil body, the Armature spring 22 transmits the movement to the trigger slide 44 (FIG. 2). A plastic striker pin, not shown, is actuated by the armature 28. After the electrical contacts of the installation built-in switch have been disconnected, the magnetic field is immediately removed, the armature 28 is pulled back into the rest position R by the armature spring 22. A stop 42 of the bearing housing 21 fixes the armature 28 held by spring force in the rest position, which is indicated by an R on the armature head 30. The distance drawn between the anchor head 30 and the stop 42 because of the clarity does not really exist.
  • FIG. 2 shows part of the trigger slide 44, which extends over three electromagnetic trigger elements arranged in the same housing.
  • the armature spring 22 of the trigger element shown is visible, the first spring leg 26 of which rests on the trigger slide 44. This acts when the armature 28 shown in the rest position R moves a release pawl of the switch lock, not shown.
  • the second spring leg 36 which is arranged at the rear in the viewing direction, is bent away from the viewer and engages with the free end in a groove 40 of the web 38.
  • the armature spring 22 shown in FIG. 3 corresponds essentially to that of FIG. 1 and has a correspondingly designed first spring leg 26 with a piece 27 of length a running parallel to the longitudinal axis L of the armature spring 22 and a second spring leg 36 bent away from the spring pointing away.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Transmitters (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (10)

  1. Procédé de transmission de force dans le système de déclenchement électromagnétique d'un disjoncteur de montage, déclenchant en cas de surintensité de courant, de réseaux de distribution basse tension, en particulier d'un disjoncteur de protection de moteur, le système de déclenchement électromagnétique agissant sur un verrou de maintien comportant essentiellement une traverse (12), un noyau (14), une bobine (18), un corps de bobine (16), un induit mobile (28) et un ressort d'induit (22) rappelant l'induit (28) en cas d'interruption de la forte surintensité de courant, caractérisé en ce que le mouvement de l'induit (28) est transmis, par une première branche de ressort (26) du ressort d'induit (22) se présentant sous forme d'un ressort hélicoïdal, monté immobile en rotation, à l'autre extrémité, à l'aide d'une seconde branche de ressort (36), directement à un curseur de déclenchement, pour l'actionnement du verrou de maintien.
  2. Procédé suivant la revendication 1, caractérisé en ce que le ressort d'induit (22) est prétendu par la seconde branche de ressort (36) ne servant pas à la transmission de force.
  3. Procédé suivant la revendication 2, caractérisé en ce que le ressort d'induit (22) est prétendu en différentes positions par encliquetage de la seconde branche de ressort (36) repliée.
  4. Dispositif pour la mise en oeuvre du procédé suivant l'une des revendications 1 à 3, caractérisé en ce que la première branche de ressort (26) du ressort d'induit (22) reliée à l'induit (28) présente des moyens de transmission directe du mouvement de l'induit, au moins dans la direction du noyau (14) du système de déclenchement électromagnétique, et qu'un curseur de déclenchement (44) actionnant le verrou de maintien présente des moyens de réception du mouvement transmis par la première branche de ressort (25).
  5. Dispositif suivant la revendication 4, caractérisé en ce que le ressort d'induit (22) présente un boîtier de logement (21) formé d'une seule pièce avec le corps de bobine (16) et pouvant être fermé après montage du ressort.
  6. Dispositif suivant la revendication 5, caractérisé en ce que le ressort d'induit (22) est disposé sur un mandrin et/ou dans une cuvette (24) du boîtier de logement (21).
  7. Dispositif suivant l'une des revendications 4 à 6, caractérisé en ce que la première branche de ressort (26) reliée à l'induit (28) est, pour former un bras de levier, tout d'abord écartée du ressort d'induit (22), de préférence de manière quelque peu tangentielle, et puis recourbée en direction de l'induit (28).
  8. Dispositif suivant la revendication 7, cractérisé en ce que la première branche de ressort (26) s'étend, avant la courbure, en direction de l'induit (28), parallèlement à l'axe du ressort (L), de préférence sur une longueur 27 de 2 à 6 mm.
  9. Dispositif suivant la revendication 8, caractérisé en ce que la partie de la première branche de ressort (26) s'étendant parallèlement à l'axe du ressort (L) est disposée dans une rainure du curseur de déclenchement (44) ou du moins se trouve, dans la direction de déclenchement, près d'une came d'entraînement ou d'un échelon du curseur de déclenchement (44).
  10. Dispositif suivant l'une des revendications 4 à 9, caractérisé en ce que la seconde branche de ressort (36) est, pour la prétension du ressort d'induit (22), tout d'abord écartée du ressort, de préférence de manière quelque peu tangentielle, et ensuite recourbée en direction de l'axe du ressort (L), en s'écartant du ressort, et s'enclique dans une rainure (40) d'une entretoise (38) du boîtier de logement (21) formée en conséquence.
EP89810164A 1988-03-15 1989-03-02 Transmission de force dans un déclencheur électromagnétique d'un disjoncteur de montage Expired - Lifetime EP0333650B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810164T ATE89949T1 (de) 1988-03-15 1989-03-02 Kraftuebertragung im elektromagnetischen ausloesesystem eines installationseinbauschalters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH976/88 1988-03-15
CH97688 1988-03-15

Publications (2)

Publication Number Publication Date
EP0333650A1 EP0333650A1 (fr) 1989-09-20
EP0333650B1 true EP0333650B1 (fr) 1993-05-26

Family

ID=4199582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810164A Expired - Lifetime EP0333650B1 (fr) 1988-03-15 1989-03-02 Transmission de force dans un déclencheur électromagnétique d'un disjoncteur de montage

Country Status (4)

Country Link
EP (1) EP0333650B1 (fr)
AT (1) ATE89949T1 (fr)
DE (1) DE58904454D1 (fr)
ES (1) ES2043090T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19952178A1 (de) * 1999-10-29 2001-05-03 Moeller Gmbh Elektrisches Schutzschaltgerät
DE19952180A1 (de) * 1999-10-29 2001-05-03 Moeller Gmbh Elektrisches Schutzschaltgerät
DE19952186A1 (de) * 1999-10-29 2001-05-03 Moeller Gmbh Elektrisches Schutzschaltgerät
EP1130613B1 (fr) * 2000-02-11 2003-10-08 Bticino S.P.A. Disjoncteur automatique avec actionnement electromagnétique pour court-circuit
DE102011080680A1 (de) * 2011-08-09 2013-02-14 Siemens Aktiengesellschaft Ankerfeder für ein Magnetsystem eines Leitungsschutzschalters sowie Leitungsschutzschalter
CN102610453A (zh) * 2012-03-16 2012-07-25 任登华 一组系列断路开关

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234344A (en) * 1963-01-18 1966-02-08 Heinemann Electric Co Electromagnetic circuit breaker having a solenoid with a hydraulic time delay means
CH577748A5 (fr) * 1973-07-31 1976-07-15 Ellenberger & Poensgen
AT343207B (de) * 1976-08-23 1978-05-10 Felten & Guilleaume Ag Oester Einstellvorrichtung fur schnellausloser von leitungsschutzschaltern
FR2496976B1 (fr) * 1980-12-19 1985-10-18 Etude Realisa Disjoncteurs Declencheur electromagnetique rapide a reponse retardee pour appareil de coupure electrique

Also Published As

Publication number Publication date
DE58904454D1 (de) 1993-07-01
ATE89949T1 (de) 1993-06-15
ES2043090T3 (es) 1993-12-16
EP0333650A1 (fr) 1989-09-20

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