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EP2030214B1 - Disjoncteur de puissance et culasse magnétique pour un disjoncteur de puissance - Google Patents

Disjoncteur de puissance et culasse magnétique pour un disjoncteur de puissance Download PDF

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Publication number
EP2030214B1
EP2030214B1 EP07729305A EP07729305A EP2030214B1 EP 2030214 B1 EP2030214 B1 EP 2030214B1 EP 07729305 A EP07729305 A EP 07729305A EP 07729305 A EP07729305 A EP 07729305A EP 2030214 B1 EP2030214 B1 EP 2030214B1
Authority
EP
European Patent Office
Prior art keywords
magnet yoke
armature
housing
shrinkage
circuit breaker
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.)
Not-in-force
Application number
EP07729305A
Other languages
German (de)
English (en)
Other versions
EP2030214A1 (fr
Inventor
Gunther Eckert
Winfried Vierling
Christoph Weber
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP2030214A1 publication Critical patent/EP2030214A1/fr
Application granted granted Critical
Publication of EP2030214B1 publication Critical patent/EP2030214B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • 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
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the invention relates to a circuit breaker, as in the document " US 3950 714 A discloses, according to the preamble of claim 6 and a magnetic yoke for a circuit breaker according to the preamble of claim 1.
  • the circuit breaker has a housing.
  • a switching device with a switch on and off switch and a combined overcurrent short-circuit current tripping device are arranged.
  • Such a combined overcurrent short-circuit current trip device has been developed to use as few components as possible. It comprises, on the one hand, an armature and, on the other hand, a magnetic yoke, to which a bimetal element is attached, through which current flows when the switch is switched on. Further, a field line exit plate is arranged on the magnetic yoke, emerge at the outgoing from the bimetallic element in current flow and guided by the magnetic yoke magnetic field lines.
  • the bimetallic element is arranged on a first side of the armature.
  • the field line exit plate is arranged on an opposite second side of the armature. At a short-circuit current, it magnetically attracts the armature. Thus, in both overcurrent and short-circuit current, the armature is rotated from a rest rotational position in the same predetermined direction. Upon rotation, it may cause the switch to turn off, for example, via a latch mechanism.
  • thermosetting plastics including urea compounds
  • housing shrinkage then has the consequence that distances change the components to each other. This can have a negative effect on thermal tripping (overcurrent tripping) and magnetic tripping (short-circuit tripping).
  • low-shrinkage or shrinkage-free housing compositions for example melamine compounds. This solution is more expensive than the use of shrinkage-prone duoplastic materials.
  • the object is achieved by a circuit breaker with the features of claim 6 and by a magnetic yoke having the features of claim 1.
  • a housing which is subject to shrinkage and the armature is mounted in such a way that it changes its rest rotational position when the housing is weak.
  • the magnetic yoke is mounted so that it also absorbs forces at a housing loss. It is shaped so that the absorbed forces cause a change in the position of the bimetallic element and the field line exit plate such that the change in the rest rotational position of the armature is counteracted. Preferably, this change is compensated (completely, as far as this is possible during a rotation).
  • an inventive magnetic yoke is used.
  • a magnetic yoke for a circuit breaker has the property that a current-conducting bimetallic element can be fastened to it. It has a base body which is designed to guide magnetic field lines emanating from a bimetallic element attached to the magnetic yoke, when current flows, to a flat field line exit plate, through the surface normal of which a first direction is defined.
  • On two opposite sides of the magnetic yoke bearing sections are defined with which the magnetic yoke is storable in a housing.
  • the bearing portions further allow the introduction of forces from the housing into the magnetic yoke in a second and a third direction (which are generally substantially opposite one another). These directions are substantially perpendicular to the first direction, and by definition at an angle of 75 ° to 105 ° (preferably 85 ° to 95 °, particularly preferably 90 °) to the first direction.
  • the magnetic yoke according to the invention is characterized in that a flexible element is arranged between one of the two bearing sections and the main body, which deflects upon introduction of forces acting in the second and third direction and thereby enables a movement of the field line exit plate in a direction substantially the first direction is the same. By definition, it deviates from this direction by at most 20 ° (preferably by at most 10 °) (this deviation may be arbitrary from the direction of deviation).
  • the magnetic yoke absorbs forces in one dimension and converts them in one movement into a dimension perpendicular thereto.
  • the bendable element is rod-shaped and has two rod positions with (compared to the other rod shape) reduced cross-section; which serve as predetermined bending points.
  • predetermined bending points By specifying the predetermined bending points, the type of bending is defined particularly clearly, so that the movement of the field line exit plate can be well-defined and the goal can be realized to counteract the change in the rest rotational position of the anchor very accurately.
  • the rod-shaped bendable element extends in a straight line at an angle of 35 ° to 55 ° (preferably 45 °) to the first direction on the one hand and to the second direction on the other hand from a bearing portion to the base body. In other words, the rod-shaped bendable element extends "obliquely”. As a result, the forces acting in an optimal manner.
  • one of the two bearing portions, between which and the base body, the bendable element is arranged, formed as a T-shaped foot.
  • the foot allows on a first leg the engagement of a screw to define a position of the foot and thus of the yoke and on another (opposite) leg an abutment to hold the foot at different positions of the screw.
  • the magnetic yoke is formed as a stamped and bent part. It is thus particularly inexpensive to produce.
  • FIG. 1 shown designated as a whole with 8 circuit breaker comprises a housing 10 which consists of a material such as thermoset, which is subject to housing shrinkage.
  • the actual switching device comprises a fixed contact 12 and a swiveling on the fixed contact 12 moving contact 14.
  • the moving contact 14 is by means of a handle 16 in the in FIG. 1 spent switching position shown, wherein the handle 16 via a bracket 18 and a contact carrier 20 moves the moving contact 14.
  • a pawl 22 engages in an anchor 24 in the ground state, ie, when the switch-on is to maintain, see in particular the illustration in FIG. 2 . If the armature 24 is pivoted clockwise, the pawl 22 is disengaged, and via the contact carrier 20, this causes a lifting of the moving contact 14 of the fixed contact 12 and thus an interruption of the on state.
  • a bimetallic element 26 is provided, which is attached to a magnetic yoke 28.
  • the attachment is particularly good in FIG. 4 to recognize.
  • the bimetallic element 26 should have a distance A to the armature 24.
  • the bimetallic element is traversed by current in the on state. When overcurrents, the bimetallic element heats up, bending.
  • the bimetallic element 26 bends in this case to the armature 24, overcomes the distance A and ultimately presses on the armature 24 so that it moves in a clockwise direction. It is thus a mechanism for overcurrent tripping. simultaneously can be done with the help of the magnet yoke 28 even with short circuit currents tripping.
  • a field line exit plate 30 is formed on the magnetic yoke 28, specifically on the other side of the armature 24 in comparison to the bimetallic element 26, in FIG. 1 ie, to the left of the armature 24 instead of the bimetal element 26 to the right of the armature 24.
  • a distance B between the field line exit plate 30 and the armature 24 is defined.
  • the bimetallic element 26 is traversed by a greatly increased current.
  • the magnetic yoke 28 guides the magnetic field lines emanating from the current-carrying bimetallic element 26 to the field line exit plate 30, so that a magnetically attractive force is exerted by the field line exit plate 30 on the armature 24 and this is attracted.
  • a locking screw 32 which engages in a T-shaped foot 34 of the magnetic yoke 28, more specifically in a leg 36 of the foot 34.
  • the magnetic yoke is supported and held by the opposite leg 38 in a recess 40 in the housing.
  • the position of the screw 32 is fixed. Upon rotation of the screw 32 thus does not change the position of the screw, but that of the magnetic yoke 28, in which the screw 32 engages. Accordingly, the distance A can be reduced and increased and at the same time the distance B are increased or decreased.
  • the shrinkage of the housing 10 with a longer housing life can now cause the distances A and B change, so that the triggering is no longer well-defined.
  • the construction as shown in the FIG causes the fading to have opposite effects.
  • the armature 24 is mounted in a bearing 41 on the housing 10. At a loss of the housing 10, the armature rotates clockwise, but not so far that the pawl 22 is triggered. In this case, the distance A is increased and the distance B is reduced. Structurally, it is now provided that the magnet yoke 28 exactly compensates for these changes in the distances A and B.
  • the magnetic yoke shown as a whole has a main body 42 which has the function of guiding magnetic field lines.
  • the magnetic field lines originating from the bimetallic element 26 are guided.
  • a fastening element 44 ( FIG. 4 ), for which there is space at an upper portion 46 of the magnetic yoke 28.
  • the upper portion 46 functions as a storage section.
  • the bearing portion 46 engages in a recess 48 in the housing 10 a.
  • an opposite bearing portion of the foot 34 which acts as mentioned above in the housing in the recess 40 acts.
  • the bendable element 50 consists of a rod 52 which tapers towards the foot 34 at a location 54 which simultaneously forms the lower leg of the T-shape of the foot 34.
  • the rod-shaped element 52 Towards the base body 42, the rod-shaped element 52 likewise tapers at a point 56 which is approximately at the height of the field line exit plate 30.
  • the tapered points 54 and 56 serve as predetermined bending points.
  • the entire rod 52 is substantially at an angle of ⁇ on the foot 34 and at an angle ⁇ on a surface normal 58 of the field line exit plate 30. ⁇ and ⁇ amount both about 45 °. This is made possible by the fact that the foot 34 is approximately perpendicular to the field line exit plate 30.
  • the forces F shrinkage now act via the bearings 40 and 48 (see arrows in FIG. 3 , also in FIG. 4 ) on the bearing sections 34 and 46, respectively.
  • the forces F shrinkage two directions of the force effect are defined which are approximately perpendicular to the surface normal 58. The actual angle slightly deviates from 90 °, but it moves in a range of 75 ° to 105 °.
  • the magnetic yoke 28 is now compressed. At the weakest points, this leads to a bending. These are the points 54 and 56.
  • the rod-shaped element 52 kinks, in the image to the left, so that the base body 42 moves with the field line exit plate 30 corresponding to the arrow 60.
  • the direction of movement according to the arrow 60 is almost equal to a direction predetermined by the surface normal 58. In any case, the direction of movement 60 does not deviate more than 20 ° from the direction predetermined by the surface normal 58.
  • the dimensions of the Magnetjochteile are selected in the yoke 28 so that the above-mentioned rotational movement of the armature, which is introduced via the bearing 40 of the housing 10 at its fading, is counteracted.
  • the armature 24 slightly rotates clockwise in case of fading, thereby increasing the distance A and decreasing the distance B.
  • the movement corresponding to the case 60 is caused.
  • the distance B is increased again.
  • the dimensions should be such that the distance B again corresponds to the distance that is defined in the ground state.
  • the movement 60 applies to the entire base body 42 and thus also to the upper part 46.
  • the bimetallic element 26 also moves in the direction indicated by the arrow 60.
  • the increase in the distance A is counteracted by the rotation of the armature 24 in the clockwise direction in case of shrinkage of the housing 10.
  • the construction therefore explicitly takes into account that the armature 24 moves due to shrinkage.
  • the magnetic yoke 28 is designed so that this does not come into play, but that the housing shrinkage simultaneously causes a second effect (on the magnetic yoke 28), which counteracts the initial effect (on the armature 24).
  • This counteracting effect is made possible in particular by the provision of the bendable rod-shaped element 52, in particular by the two predetermined bending points 54 and 56.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Fuses (AREA)

Abstract

Dans les disjoncteurs de puissance munis d'un dispositif combiné de déclenchement sur surintensité et court-circuit, le déclenchement doit se produire d'une manière parfaitement définie en cas de surintensité et d'un courant de court-circuit. Pour ce faire, il faut régler les écarts (A, B) avec précision. Si le boîtier se compose d'un matériau économique tel qu'une résine thermodurcissable, il subit une contraction, ce qui risque de modifier les écarts mentionnés. Conformément à l'invention, un induit (24) est d'une part logé de telle sorte qu'il modifie sa position de rotation au repos en cas de contraction du boîtier. Une culasse (28) magnétique faisant partie du dispositif de déclenchement sur surintensité et court-circuit est logée et façonnée de telle sorte que la rotation est compensée avec précision de sorte que lesdits écarts ne soient pas modifiés malgré la contraction.

Claims (7)

  1. Culasse magnétique (28) pour un disjoncteur de protection de circuit (8), sur laquelle est disposé un élément bimétallique conducteur (26) et qui présente un corps de base (42) apte à conduire des lignes de champ magnétique, qui émanent de l'élément bimétallique (26) en cas de passage de courant, à une plaque de sortie de lignes de champ (30) dont la normale de surface (58) définit une première direction, et dans laquelle sont définies, sur deux côtés opposés de la culasse magnétique (28), des portions d'appui (34, 46) grâce auxquelles la culasse magnétique (28) peut être logée dans un boîtier (10) et qui permettent l'introduction de forces (FSchwindung) du boîtier (10) dans la culasse magnétique (28) dans une deuxième et une troisième directions, à chaque fois suivant un angle prédéfini par rapport à la première direction,
    caractérisée en ce que
    un élément déformable (52) est disposé entre l'un des deux portions d'appui (34, 46) et le corps de base (42), lequel élément se déforme en cas d'introduction de forces (FSchwindung) agissant dans la deuxième et troisième directions et permet ainsi un déplacement de la plaque de sortie de lignes de champ (30) dans une direction (60) qui correspond sensiblement à la première direction.
  2. Culasse magnétique (28) selon la revendication 1,
    caractérisée en ce que
    l'élément flexible (52) est en forme de barre et présente deux endroits (54, 56) de section réduite, qui servent de points destinés à la flexion.
  3. Culasse magnétique (28) selon la revendication 2,
    caractérisée en ce que
    l'élément flexible (52) en forme de barre s'étend en ligne droite d'une portion d'appui (34) au corps de base (42), suivant l'angle (α, β) allant de 35° à 55° par rapport à la première direction d'une part et à la deuxième direction d'autre part.
  4. Culasse magnétique selon l'une des revendications précédentes,
    caractérisée en ce que
    l'une des deux portions d'appui, entre laquelle et le corps de base (42) est disposé l'élément flexible (52), est réalisée sous forme de pied (34) en forme de T, permettant sur une branche (36) l'engagement d'une vis (32) pour définir une position du pied (34) et ainsi de la culasse magnétique (28), et permettant sur une autre branche (38) un contre-appui pour maintenir le pied (34) dans différentes positions de la vis (32).
  5. Culasse magnétique (28) selon l'une des revendications précédentes,
    caractérisée en ce que
    elle est réalisée sous forme de pièce flexible découpée.
  6. Disjoncteur de protection de circuit (8), avec un boîtier (10) dans lequel sont disposés un dispositif de commutation (12, 14, 16, 18, 20, 22) comportant un commutateur (12, 14) pouvant être branché ou débranché, et un dispositif combiné de déclenchement à courant de surcharge et courant de court-circuit (24, 26, 28), le dispositif de déclenchement à courant de surcharge et courant de court-circuit comprenant d'une part un induit (24), et comprenant d'autre part une culasse magnétique (28) sur laquelle est fixé un élément bimétallique (26) qui est traversé par le courant lorsque le commutateur est branché, sur la culasse magnétique (28) étant disposée en outre une plaque de sortie de lignes de champ (30) sur laquelle sortent des lignes de champ magnétique qui émanent de l'élément bimétallique en cas de passage de courant et qui sont conduites par la culasse magnétique (28), l'élément bimétallique (26) étant disposé sur un côté de l'induit (24) de manière à appuyer sur l'induit (24) en cas de courant de surcharge et la plaque de sortie de lignes de champ (30) étant disposée sur un côté opposé de l'induit (24) de manière à attirer l'induit magnétiquement en cas de courant de court-circuit, de telle sorte qu'en cas de courant de surcharge comme en cas de courant de court-circuit l'induit (24) est entraîné en rotation d'une position de rotation de repos dans la même direction prédéfinie et est capable de provoquer un débranchement du commutateur pendant la rotation,
    caractérisé en ce que
    le boîtier (10) est soumis à une contraction et l'induit (24) est logé de manière à modifier sa position de rotation de repos en cas de contraction du boîtier, et en ce que la culasse magnétique (28) est logée (40, 48) de manière à absorber également des forces (FSchwindung) en cas de contraction du boîtier, et en ce que la culasse magnétique (28) est formée de telle manière que les forces absorbées provoquent une modification (60) de la position de l'élément bimétallique (26) et de la plaque de sortie de lignes de champ (30), de telle sorte qu'il est agi à l'encontre de la modification de la position de rotation de repos de l'induit et que celle-ci est de préférence compensée.
  7. Disjoncteur de protection de circuit (8) selon la revendication 6,
    caractérisé en ce que
    la culasse magnétique est une culasse magnétique (28) selon l'une des revendications 1 à 5.
EP07729305A 2006-06-16 2007-05-21 Disjoncteur de puissance et culasse magnétique pour un disjoncteur de puissance Not-in-force EP2030214B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006027812A DE102006027812A1 (de) 2006-06-16 2006-06-16 Leitungsschutzschalter und Magnetjoch für einen Leitungsschutzschalter
PCT/EP2007/054861 WO2007144246A1 (fr) 2006-06-16 2007-05-21 Disjoncteur de puissance et culasse magnétique pour un disjoncteur de puissance

Publications (2)

Publication Number Publication Date
EP2030214A1 EP2030214A1 (fr) 2009-03-04
EP2030214B1 true EP2030214B1 (fr) 2012-06-27

Family

ID=38290153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07729305A Not-in-force EP2030214B1 (fr) 2006-06-16 2007-05-21 Disjoncteur de puissance et culasse magnétique pour un disjoncteur de puissance

Country Status (8)

Country Link
US (1) US7893797B2 (fr)
EP (1) EP2030214B1 (fr)
CN (1) CN101473396B (fr)
AR (1) AR061473A1 (fr)
BR (1) BRPI0713289B1 (fr)
DE (1) DE102006027812A1 (fr)
RU (1) RU2399112C1 (fr)
WO (1) WO2007144246A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040947A1 (de) * 2010-09-17 2012-03-22 Siemens Aktiengesellschaft Auslöseeinrichtung für ein Schutzschaltgerät sowie Schutzschaltgerät
CN108922837B (zh) * 2018-08-20 2023-09-01 厦门大恒科技有限公司 一种动平衡电磁脱扣开关以及断路器
WO2021072524A1 (fr) * 2019-10-17 2021-04-22 Aldo Luiz Bortolini Agencement appliqué à un mécanisme de verrouillage de disjoncteur
CN113192798B (zh) * 2021-02-07 2024-05-10 浙江世隆电气科技有限公司 一种电子式和热磁式塑壳断路器通用安装的脱扣器结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088008A (en) * 1959-11-03 1963-04-30 Westinghouse Electric Corp Circuit breaker
US3110786A (en) * 1959-11-03 1963-11-12 Westinghouse Electric Corp Electromagnetic thermal current circuit breaker
DE2006872A1 (de) * 1970-02-14 1971-09-09 Licentia Gmbh In Kunststoff gelagerte Schalterteile
US3818168A (en) * 1972-12-01 1974-06-18 Gen Switch Co Latch mechanism for toggle actuated circuit breaker
US3950714A (en) * 1974-09-18 1976-04-13 Westinghouse Electric Corporation Self-adjusting circuit breaker with rotating trip assembly
US4386329A (en) * 1981-06-29 1983-05-31 Gte Laboratories Incorporated Stored energy trip unit
RU2117357C1 (ru) 1997-03-25 1998-08-10 Акционерное общество открытого типа "НИИЭлектроаппарат" Максимальный электромагнитный расцепитель тока автоматического выключателя
CN1224072C (zh) * 2001-01-31 2005-10-19 西门子公司 用于热脱扣器的调整装置
EP1402552B1 (fr) * 2001-07-02 2006-05-24 Siemens Aktiengesellschaft Dispositif d'ajustement pour declencheur thermique

Also Published As

Publication number Publication date
BRPI0713289B1 (pt) 2018-06-12
CN101473396B (zh) 2011-12-14
CN101473396A (zh) 2009-07-01
AR061473A1 (es) 2008-08-27
RU2009101165A (ru) 2010-07-27
BRPI0713289A2 (pt) 2012-03-06
DE102006027812A1 (de) 2007-12-20
RU2399112C1 (ru) 2010-09-10
EP2030214A1 (fr) 2009-03-04
US20100052828A1 (en) 2010-03-04
WO2007144246A1 (fr) 2007-12-21
US7893797B2 (en) 2011-02-22

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