EP0287752B1 - Interrupteur électromagnétique avec entraînement électromagnétique - Google Patents

Interrupteur électromagnétique avec entraînement électromagnétique Download PDF

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Publication number
EP0287752B1
EP0287752B1 EP88100712A EP88100712A EP0287752B1 EP 0287752 B1 EP0287752 B1 EP 0287752B1 EP 88100712 A EP88100712 A EP 88100712A EP 88100712 A EP88100712 A EP 88100712A EP 0287752 B1 EP0287752 B1 EP 0287752B1
Authority
EP
European Patent Office
Prior art keywords
switching device
contact bridge
magnet
contactor
contactor magnet
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
EP88100712A
Other languages
German (de)
English (en)
Other versions
EP0287752A2 (fr
EP0287752A3 (en
Inventor
Manfred Dipl.-Ing. Aulmann
Norbert Brucksch
Guido Buchbender
Gerhard Dipl.-Ing. Rossmann
Werner Vogelsang
Gerd Ing.-Grad. Voiss
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.)
Eaton Industries GmbH
Original Assignee
Kloeckner Moeller 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 Kloeckner Moeller GmbH filed Critical Kloeckner Moeller GmbH
Publication of EP0287752A2 publication Critical patent/EP0287752A2/fr
Publication of EP0287752A3 publication Critical patent/EP0287752A3/de
Application granted granted Critical
Publication of EP0287752B1 publication Critical patent/EP0287752B1/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
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
    • 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
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • 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
    • H01H71/7409—Interchangeable elements

Definitions

  • the invention relates to an electromagnetic switching device with an electromagnetic drive for the operational switching of currents in the load range and with a quick release connected in series for protection against currents in the overload range, with a switching chamber, with fixed contacts, movable contacts, quenching plates and contact bridge carriers, which by means of a two-armed, In the opening direction of the contact bridge, spring-loaded rocker switch can be actuated by a contactor magnet laterally offset with respect to the contact bridge carrier with a fixed part and a movable part, the quick release acting on the contact bridge carrier being arranged in such a way that the contact bridge carrier is actuated by the rocker switch of the contactor magnet and by the Rapid release takes place independently of one another, the contactor magnet and the quick release also being located on both sides of the actuation axis of the contact bridge support are arranged side by side, the rocker switch being pivotally mounted with its pivot axis approximately at the level of the contact surface of the contact bridge carrier and laterally next to it, and wherein the plunger of the quick release acts approximately
  • Such an electromagnetic switching device is known from EP-A-0 179 677. It is used for the operational switching of currents in various types of electrical systems. Due to the high currents to be switched, the contacts of such switchgear are subject to welding in the event of high overloads or short-circuit currents, since the dynamic opening of the contacts creates an arc. The welding of the contacts is countered by connecting a protective element or circuit breaker, for which an additional quick release is required, which opens the contacts very quickly in the event of an overload, so that they cannot weld. However, the shutdown and current limitation cannot be implemented in such a way that welding or an increased erosion of the contacts is reliably prevented in any case.
  • the electromagnetic quick release acts on the contact bridge support via an intermediate lever and a pretensioned switching mechanism.
  • the triggering devices act equally on the pretensioned switch lock and on the plunger on the contact bridge support of the switching device or the transmission device assigned to it.
  • this control unit acts on the contact bridge support.
  • the quick release is connected in series with the electromagnet for actuating an unlocking pawl to open the switching contacts and acts directly and without delay with its pusher without an intermediate element the contact bridge support.
  • this requires an additional resilient mounting of the contact bridge support on a support lever which interacts with the unlocking pawl. This also delays the contact opening inadmissibly.
  • the known switching devices are bulky and must be dismantled to replace the contactor solenoid. In addition, relatively large masses must be moved against the pressure of the contact spring when opening the contact bridge with the movable contacts arranged thereon.
  • the invention has for its object to provide a particularly compact arrangement of electromagnetic drive and quick release in such electromagnetic switching devices, which on the one hand guarantees a direct instantaneous opening of the contacts when the quick release is actuated, but also for opening the contact bridge without actuating the Rapid release only small masses have to be moved.
  • the invention has the advantage that the quick release acts directly on the contact bridge carrier with a compact design of the switching device and, in the event of an overcurrent release or a short circuit, causes the contact opening directly.
  • the current limitation of the forward current is essentially dependent on the opening time of the contacts, which in turn depends on the response time of the quick release. Any intermediate component, lever or switch lock would lead to a significant increase in the transmission values given the steepness of the current rise curve.
  • the modular combination of the switch parts provided with other components results in particularly easy assembly of such switchgear, which also enables fully automatic production and assembly of such switchgear due to the special arrangement and structure of the existing device parts.
  • the electromagnetic switching device 1 has an electromagnetic drive 2 for the operational switching of currents in the load range and a quick release 3 in series therewith for protection against currents in the overload range.
  • the contact bridge support 8 which can be actuated by means of a rocker switch 9 by means of a contactor magnet 10 which is laterally offset with respect to the contact bridge support 8.
  • the quick release 3 acting on the contact bridge support 8 is arranged such that the contact bridge support 8 is actuated independently of one another by the rocker switch 9 of the contactor magnet 10 and by the quick release 3.
  • the electromagnetic contactor drive 10 and the quick release 3 are arranged parallel to one another on both sides of the longitudinal central axis or on both sides of the actuation axis 11 of the contact bridge carrier 8.
  • the electromagnetic quick release 3 is arranged so that it acts in the event of a high overload current (short-circuit current) directly and without delay on the contact bridge carrier 8 without an intermediate member and brings about the contact opening.
  • the contactor magnet 10 and the quick release 3 with their plungers 10a and 3a are arranged axially parallel to the longitudinal center axis or to the actuation axis 11 of the contact bridge carrier 8.
  • a compression spring 12 actuated rocker switch 9 with its pivot axis 13 in the actuating direction of the contact bridge support 8 below the fixed part or the magnetic core 14 of the protective magnet 10 and approximately at the level of the contact surface 15 of the contact bridge support 8 and is located with it from the contact bridge support 8 opposite leg 16 on the compression spring 12, which is supported on the switch housing 17 outside of the contactor magnet 10 offset laterally.
  • the plunger 3a of the quick release 3 engages at approximately the same height or only slightly offset in height, as the rocker switch 9 engages the contact surface 15 of the contact bridge carrier 8.
  • the compression spring 12 serving as an opening spring for the contact bridge engages on the leg 16 of the rocker switch 9 which is directed away from the contact bridge support 8 approximately parallel to the actuating direction or axis 11 of the contact bridge support 8. It is supported against the direction of actuation of the contactor magnet 10 on the switch housing 17, the leg 16 of the switching rocker 9, which acts away from the contact bridge support 8, acting approximately in an extension of the axis of the compression spring 12 of the plunger 10a of the contactor magnet 10, which engages with the movable part 18 of the contactor magnet is firmly connected.
  • the movable part 18 of the contactor magnet 10 is also fastened to a yoke 20 which is displaceably guided on the cover 19 of the switch housing 17 in the actuating direction of the contactor magnet 10, from which the plunger 10a protrudes outside the contactor magnet 10 in the actuating direction of the contactor magnet against the rocker switch 9 and from which Boom 21 for actuating one next to the quick release 3 on the opposite side wall 22 within the switch housing 17 arranged auxiliary switch 23 is directed to the side.
  • the contact bridge support 8 has a cantilevered stop lug 24 for the plunger 3a of the quick release 3, and the auxiliary switch 23 is arranged on the switch housing 17 so that it is axially parallel to the contactor magnet 10 and to the electromagnetic quick release 3 can be actuated.
  • a driver 25 protruding out of the housing of the auxiliary switch is used, on which the arm 21 of the yoke 20 of the contactor magnet 10 comes to rest when the contactor magnet is excited to trigger the auxiliary switch 23.
  • the fixed part or the magnetic core 14 of the contactor magnet 10 is fastened between the lower housing part 26 and the housing cover 19 of the switch housing 17 such that the contactor magnet coil 27 is exposed after the housing cover 19 has been lifted off and can be exchanged for a coil with different voltage or frequency values from the front of the switching device 1 without dismantling the switching device 1.
  • the magnetic core 14 of the contactor magnet 10 is held in side pockets or grooves 28, 29 on opposite side walls 30, 31 of the switch housing 17 and is secured in its position by lateral abutment webs 32, 33 on the housing cover 19 (FIGS. 5 and 6) 5, 6 and 7 can be seen in detail.
  • the magnetic core 14 of the contactor magnet 10 is flush with the side wall edge 34 of the lower housing part 26, and the abutment webs 32, 33 protrude from the two opposite side wall edges of the housing cover 19 in such a way that when the housing cover 19 is closed they abut against the end faces 35 of the magnetic core 14 in the region of the grooves or pockets 28, 29 for holding the magnetic core.
  • the contactor solenoid 27 is also, as shown in FIGS. 4 to 6, fixed with coil connections 36, 37 facing outward to the side walls 30, 31 of the switch housing 17 between the lower housing part 26 and the housing cover 19, the coil connections 36, 37 in Height of the underside of the switch housing 17 on both sides of the terminals 38 (Fig. 2) of the auxiliary switch 23 are arranged.
  • the auxiliary switch 23 can be inserted with lateral guide webs 39, 40 in grooves 41, 42 on the switch housing, axially parallel to the quick release 3 and to the contactor magnet 10, and can also be exchanged for other types of auxiliary switch after dismantling the contactor solenoid 27.
  • the housing cover 19 When the housing cover 19 is closed, it is secured in its installed position by the coil connections 36, 37 of the contactor magnet coil 27 enclosed between the lower housing part 26 and the cover 19.
  • At least one of the two coil connections 36, 37 of the contactor magnet coil 27 has a display panel 43 for the electrical values of the coil current or the like, which is shown by a window 44 (FIGS. 1 and 2) on the housing cover 19 is visible.
  • connection block 47 for outgoing electrical lines or another electrical attachment 48 (FIG. 9), such as a circuit breaker with matching contact tongues or connecting elements 47a, 48a, can be connected.
  • the connection block 47 is formed with a base plate 49 for a top-hat rail fastening 50, screw fastening or the like, which bears against the rear side 51 of the switch housing and from which a side cover plate 52 protrudes at a right angle, which is firmly connected to the connection block 47 and the switch housing one side at least partially overlooked (Fig. 1 and 2).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (14)

  1. Appareil électromagnétique de connexion (1) ayant une commande électromagnétique (2) pour l'établissement et la coupure de service de courants dans le domaine de charge et un déclencheur rapide (3) en série avec celle-ci pour la protection contre les courants dans le domaine de surcharge, et comportant une chambre de manoeuvre (4) contenant des contacts fixes (5), des contacts mobiles (6), des plaques d'extinction (7) et un support de pont de contact (8) qui peut être manoeuvré au moyen d'une bascule à deux bras (9), chargée par un ressort dans le sens de l'ouverture du pont de contact, par un aimant relais (10) décalé latéralement du support de pont de contact (8) et comportant une partie fixe (14) et une partie mobile (18), le déclencheur rapide (3), qui agit sur le support de pont de contact (8), étant placé de façon telle que la manoeuvre de ce dernier soit produite par la bascule de manoeuvre (9) de l'aimant relais (10) et par le déclencheur rapide (3) indépendamment l'un de l'autre, l'aimant relais (10) et le déclencheur rapide (3) étant en outre placés l'un à côté de l'autre de part et d'autre de l'axe de manoeuvre (11) du support de pont de contact (8), la bascule de manoeuvre (9) étant en outre montée basculante par son axe de basculement (13) à peu près à la hauteur de la surface d'attaque (15) du support de pont de contact (8) et à côté de celui-ci, et le poussoir (3a) du déclencheur rapide (3) attaquant le support de pont de contact (8) à peu près à la même hauteur que le fait la bascule de manoeuvre (9) ou à une hauteur très peu différente,
    caractérisé par le fait que les poussoirs (10a, 3a) de la partie mobile (18) de l'aimant relais (10) et du déclencheur rapide (3) sont parallèles à l'axe de manoeuvre (11) du support de pont de contact (8),
    que l'axe de basculement (13) de la bascule de manoeuvre (9) est placé, dans la direction de manoeuvre du support de pont de contact (8), au-dessous de la partie fixe, ou noyau magnétique (14), de l'aimant relais (10) et sa branche (16) dirigée à l'opposé du support de pont de contact (8) s'appuie sur un ressort de compression (12) qui attaque cette branche (16) à peu près parallèlement à l'axe de manoeuvre (11) du support de pont de contact (8) et s'appuie, dans la direction opposée à la direction de manoeuvre de l'aimant relais (10), sur le boîtier (17) de l'appareil,
    et que le poussoir (10a), solidaire de la partie mobile (18) de l'aimant relais (10), attaque la branche (16) de la bascule de manoeuvre (9) dirigée à l'opposé du support de pont de contact (8) à peu près dans le prolongement de l'axe du ressort de compression (12).
  2. Appareil électromagnétique de connexion selon la revendication 1, caractérisé par le fait que la partie mobile (18) de l'aimant relais (10) est fixée à une culasse (20) montée mobile sur le couvercle (19) du boîtier (17) de l'appareil dans la direction de manoeuvre de l'aimant relais (10), culasse d'où le poussoir (10a) fait saillie à l'extérieur de l'aimant relais (10) vers la bascule de manoeuvre (9) dans la direction de manoeuvre de l'aimant relais (10), et d'où est dirigé de côté un bras (21) dépassant du déclencheur rapide (3) vers la paroi latérale opposée (22) du boîtier et destiné à la manoeuvre d'un auxiliaire de commande (23) placé près du déclencheur rapide (3) sur la paroi latérale (22) à l'intérieur du boîtier (17) de l'appareil.
  3. Appareil électromagnétique de connexion selon l'une des revendications 1 et 2, caractérisé par le fait que le support de pont de contact (8) présente un nez de butée en saillie (24) dirigé de côté à l'opposé de la bascule de manoeuvre (9) et sur lequel bute le poussoir (3a) du déclencheur rapide (3).
  4. Appareil électromagnétique de connexion selon la revendication 2, caractérisé par le fait que l'auxiliaire de commande (23) peut être manoeuvré parallèlement à l'axe de l'aimant relais (10) et à l'axe du déclencheur électromagnétique rapide (3).
  5. Appareil électromagnétique de connexion selon l'une des revendications 2 et 4, caractérisé par le fait que l'auxiliaire de commande (23) peut être manoeuvré par l'intermédiaire d'un organe d'entraînement (25) saillant de son boîtier vers l'extérieur, sur lequel le bras (21) de la culasse (20) de l'aimant relais (10) vient s'appuyer lors de l'excitation de ce dernier pour le déclenchement de l'auxiliaire de commande (23).
  6. Appareil électromagnétique de connexion selon l'une des revendications 1 à 5, caractérisé par le fait que la partie fixe, ou noyau magnétique (14), de l'aimant relais (10) est fixée entre le socle (26) et le couvercle (19) du boîtier (17) de l'appareil de façon telle qu'après enlèvement du couvercle (19) du boîtier, la bobine (27) de l'aimant relais soit dégagée et puisse être remplacée par une bobine ayant d'autres valeurs de tension ou de fréquence depuis le côté avant de l'appareil (1) sans démontage de celui-ci.
  7. Appareil électromagnétique de connexion selon l'une des revendications 1 à 6, caractérisé par le fait que le noyau magnétique (14) de l'aimant relais (10) est monté dans des poches ou rainures latérales (28, 29) prévues sur des parois latérales opposées (30, 31) du boîtier (17) de l'appareil et immobilisé dans sa position par des nervures de butée (32, 33) prévues sur le couvercle (19) du boîtier.
  8. Appareil électromagnétique de connexion selon l'une des revendications 1 à 7, caractérisé par le fait que le noyau magnétique (14) de l'aimant relais (10) se termine à fleur du bord (34) de la paroi latérale du socle (26) du boîtier (17) de l'appareil, et que les nervures de butée (32, 33) saillent, dirigées l'une vers l'autre, des deux bords de paroi latérale opposés du couvercle (19) du boîtier.
  9. Appareil électromagnétique de connexion selon l'une des revendications 1 à 8, caractérisé par le fait que la bobine (27) de l'aimant relais est fixée entre le socle (26) et le couvercle (19) du boîtier à des bornes (36, 37) dirigées vers l'extérieur vers les parois latérales (30, 31) du boîtier (17) de l'appareil.
  10. Appareil électromagnétique de connexion selon l'une des revendications 2 à 9, caractérisé par le fait que les bornes (36, 37) de la bobine (27) de l'aimant relais sont placées à la hauteur de la face inférieure du boîtier (17) de l'appareil de part et d'autre des bornes (38) de l'auxiliaire de commande (23).
  11. Appareil électromagnétique de connexion selon l'une des revendications 1 à 10, caractérisé par le fait qu'au moins une des deux bornes (36, 37) de la bobine (27) de l'aimant relais présente une plaque (43) indiquant les valeurs du courant dans la bobine ou des valeurs analogues qui est visible par une fenêtre (44) prévue sur le couvercle (19) du boîtier.
  12. Appareil électromagnétique de connexion selon l'une des revendications 1 à 11, caractérisé par le fait que, sur une face du boîtier (17) de l'appareil opposée aux bornes de réseau (45) de l'appareil (1), saillent vers l'extérieur des languettes de contact (46) auxquelles peut être connecté au choix un bloc de jonction (47) pour des lignes électriques de départ ou un appareil électrique rapporté (48) ayant des languettes de contact ou des éléments de connexion (47a, 48a) adaptés.
  13. Appareil électromagnétique de connexion selon la revendication 12, caractérisé par le fait que le bloc de jonction (47) est pourvu d'une embase (49) appliquée sur la face arrière (51) du boîtier (17) de l'appareil pour une fixation sur rail (50), une fixation par vis ou une fixation analogue.
  14. Appareil électromagnétique de connexion selon l'une des revendications 12 et 13, caractérisé par le fait que le bloc de jonction (47) est pourvu d'une plaque de couverture (52) dépassant au moins en partie latéralement du boîtier (17) de l'appareil et fixée à angle droit à l'embase (49) de l'appareil (1).
EP88100712A 1987-04-22 1988-01-20 Interrupteur électromagnétique avec entraînement électromagnétique Expired - Lifetime EP0287752B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19873713412 DE3713412A1 (de) 1987-04-22 1987-04-22 Elektromagnetisches schaltgeraet mit elektromagnetischem antrieb
DE3713412 1987-04-22
DE8705806U DE8705806U1 (de) 1987-04-22 1987-04-22 Elektromagnetisches Schaltgerät mit elektromagnetischem Antrieb

Publications (3)

Publication Number Publication Date
EP0287752A2 EP0287752A2 (fr) 1988-10-26
EP0287752A3 EP0287752A3 (en) 1990-05-30
EP0287752B1 true EP0287752B1 (fr) 1994-09-28

Family

ID=25854829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100712A Expired - Lifetime EP0287752B1 (fr) 1987-04-22 1988-01-20 Interrupteur électromagnétique avec entraînement électromagnétique

Country Status (2)

Country Link
EP (1) EP0287752B1 (fr)
DE (3) DE3713412A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE19538057C1 (de) * 1995-10-12 1997-02-20 Siemens Ag Elektromagnetisches Schaltgerät

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US5041805A (en) * 1988-10-06 1991-08-20 Mitsubishi Denki Kabushiki Kaisha Remote-controlled circuit breaker
KR920003958B1 (ko) * 1988-10-06 1992-05-18 미쓰비시전기 주식회사 원격조작식 회로차단기
KR920003957B1 (ko) * 1988-10-17 1992-05-18 미쯔비시 덴끼 가부시기가이샤 원격조작식 회로차단기
GB8917283D0 (en) * 1989-07-28 1989-09-13 Federal Pioneer Ltd Miniature circuit breakers
FR2652947B1 (fr) * 1989-10-06 1994-03-04 Telemecanique Appareil interrupteur a commande electromagnetique a poles a ouverture.
JP2812810B2 (ja) * 1990-02-14 1998-10-22 三菱電機株式会社 開閉器
GB2246909B (en) * 1990-07-16 1995-02-22 Terasaki Denki Sangyo Kk Circuit breaker including forced contact parting mechanism capable of self-retaining under short circuit condition
DE4244606C2 (de) * 1992-12-31 1995-08-31 Kloeckner Moeller Gmbh Elektromagnetisches Schaltgerät
DE19519756C1 (de) * 1995-05-30 1996-07-25 Siemens Ag Elektromagnetisches Schaltgerät
DE19617136C2 (de) * 1996-04-29 2000-05-11 Siemens Ag Schaltgerät
FR2759489B1 (fr) * 1997-02-12 1999-03-19 Schneider Electric Sa Appareil electrique multipolaire composable
DE19919949C5 (de) * 1999-04-30 2013-03-07 BSH Bosch und Siemens Hausgeräte GmbH Vorrichtung mit einem Sicherheitsschalter
DE20304414U1 (de) * 2003-03-19 2004-07-29 Weidmüller Interface Gmbh & Co. Schaltgerät mit Anschlüssen für elektrische Leiter
DE102006034818B3 (de) * 2006-07-27 2008-01-03 Moeller Gmbh Kontaktsystem einer elektrischen Schaltanordnung
CN101512705A (zh) * 2006-09-07 2009-08-19 西门子公司 开关设备、尤其是紧凑型起动器

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GB175965A (en) * 1921-02-24 1922-05-25 Krupp Ag Improvements in electromagnetic overload circuit-breakers
AT111712B (de) * 1927-05-18 1928-12-27 Fritz Fratzscher Fahrradstütze.
FR962941A (fr) * 1947-12-09 1950-06-23
FR2408209A1 (fr) * 1977-11-08 1979-06-01 Telemecanique Electrique Contacteur electro-magnetique equipe d'un electro-aimant sensible aux surintensites pour provoquer la limitation et la coupure des courants excessifs
FR2516304A1 (fr) * 1981-11-09 1983-05-13 Telemecanique Electrique Interrupteur a commande mecanique et ouverture automatique
FR2570872B1 (fr) * 1984-09-27 1988-08-26 Telemecanique Electrique Dispositif de commutation a composition variable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538057C1 (de) * 1995-10-12 1997-02-20 Siemens Ag Elektromagnetisches Schaltgerät

Also Published As

Publication number Publication date
DE8705806U1 (de) 1988-08-18
EP0287752A2 (fr) 1988-10-26
EP0287752A3 (en) 1990-05-30
DE3851650D1 (de) 1994-11-03
DE3713412A1 (de) 1988-11-03

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