EP1168402B1 - Sous-ensemble magnétique pour appareil électrique modulaire d'épaisseur réduite. - Google Patents
Sous-ensemble magnétique pour appareil électrique modulaire d'épaisseur réduite. Download PDFInfo
- Publication number
- EP1168402B1 EP1168402B1 EP00440202A EP00440202A EP1168402B1 EP 1168402 B1 EP1168402 B1 EP 1168402B1 EP 00440202 A EP00440202 A EP 00440202A EP 00440202 A EP00440202 A EP 00440202A EP 1168402 B1 EP1168402 B1 EP 1168402B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- electrical device
- assembly
- branches
- plate
- 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
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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
- H01H71/2481—Electromagnetic mechanisms characterised by the coil design
-
- 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
- H01H71/38—Electromagnetic mechanisms wherein the magnet coil also acts as arc blow-out device
-
- 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
- H01H71/402—Combined electrothermal and electromagnetic mechanisms in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism
Definitions
- the present invention relates to a magnetic sub-assembly for modular electrical equipment of the circuit breaker type, allowing line cut in the event of a sudden overcurrent, as well as equipment fitted therewith.
- Line protection circuit breakers currently include generally, in a modular housing with plastic shells, a circuit extending between two terminals and comprising a bimetallic strip thermal trip to protect the line against overloads, a fixed contact and a movable contact and, between a terminal and a fixed contact, an electromagnetic trip device or magnetic trigger.
- the latter essentially comprises a coil with a core mobile associated with a striker to ensure, in the event of an overcurrent, the separation by separation of the movable contact and the fixed contact by means a mechanical lock to which the movable contact is secured, and which may tip over under the action of the striker.
- the trigger more specifically includes an induction coil, mounted longitudinally in a cylinder head magnetic, and surrounding said movable core associated with the striker as well a fixed core, a return spring arranged between the cores coming further complete the assembly.
- This spring allows in particular to return the moving core to the rest position, striker in position inactive, i.e. away from the mechanical lock making opening of the contacts by tilting the movable contact.
- the cylinder head consists of a sheet of magnetic material surrounding the coil to correctly channel the field lines produced when the coil is traversed by a current.
- the cylinder head On either side of said coil, in an axial direction, the cylinder head comprises conventionally flanks facing each other, one of which is provided with fixed core, and at the level of which are arranged elements general attached to the magnetic sub-assembly, i.e. one of the circuit breaker connection terminals and fixed contact.
- the coil takes usually the shape of a volume solenoid therefore substantially cylindrical, with axial and transverse dimensions vary by size, even from one copy to another for the same size, a dimensional dispersion cannot be excluded in the manufacture of coils.
- a dimensional dispersion cannot be excluded in the manufacture of coils.
- it is however necessary to maintain a copper section and a polar section data.
- Solenoids in fact occupy almost the entire width of a simple modular device, i.e. they extend transversely practically from one shell to the other of the case.
- coils In the constant search for an optimization of the integration of components in modular line protection devices, coils have always represented an element occupying a space significant relatively in internal volume, and considered difficult to reduce.
- One of the objectives of the present invention is to provide a particular configuration which can be adapted to said half-modules, and based on a flat-looking coil according to the teaching of the document previous.
- the structure used has a magnetic circuit comprising a fixed portion and a movable portion, whose relative arrangement makes it possible to significantly increase the useful force of the element causing tripping.
- the magnetic sub-assembly is more precisely composed conventionally an induction coil mounted in a cylinder head magnetic with a device for triggering the lock in view to separate the movable contact from the fixed contact, and has a flat configuration with a spiral coil with at least one layer winding cooperating with a magnetic U-shaped yoke comprising a core developing along the axis of the coil and two branches extend radially towards the periphery of said coil, the free edge of at least one of the branches being separated from a pallet closing the magnetic circuit by an air gap, said pallet being movable relative to the branches, capable of actuating said lock to make it trip in the event of an overcurrent and controlled by means of reminder bringing it away from said lock in the absence of overcurrent.
- the proposed configuration implies not only a particularity structural of the coil, but also a geometry of the circuit magnetic materialized by the cylinder head adapted to this structure. He is at note that it is the mobile portion of said circuit which is provided for cooperate directly with the lock, without intermediate piece, which considerably simplifies the structure on the one hand, and the assembly on the other go.
- the primary objective of the invention lies in a possibility of optimization obtained by combining the two functions of magnetic trip due to overcurrent and trip thermal due to overload.
- the movable pallet is a bimetallic strip distorting under the effect of heat caused by an overcurrent.
- the ends of the said pallet are directly electrically connected on the one hand to one of the terminals of electrical equipment and on the other hand to the spiral coil.
- the pallet mobile is a bimetallic strip which deforms under the effect of the heat produced by the coil, said bimetallic strip then not being connected to the electrical circuit of the apparatus.
- the core of the magnetic yoke may consist of sheets stacked to limit the currents of Eddy, the branches being flat.
- a variant with a solid core can, however, be implemented.
- the branches are actually attached to the two ends of the nucleus, hence the U-shaped configuration which in reality only relates to the fixed portion of the magnetic circuit.
- a mechanical cooperation in the form of the exercise of a force, may exist between the pallet and the trigger lock, at minus a portion of the pallet is positioned near an arm release of the lock, which is actuated by said portion when the pallet approaches at least one of the branches of the magnetic yoke under the effect of increased flow in the circuit magnetic.
- Said lock is therefore arranged, relative to the pallet, such so that there can be contact when the latter moves, that is to say in fact so that part of the arm crosses the trajectory movement of the pallet.
- the pallet actually presents a shape of blade of width substantially equal to the distance between the two branches of the cylinder head. More preferably, at least a portion of the arm of release of the lock is arranged between said branches.
- the action zone is then located at the free end of the pallet, which does not imply any modification / addition across the width.
- the pallet is movable in rotation about an axis parallel to the axis of the spiral coil, said axis being located near the end of at least one of the branches, the outside of the U-shaped magnetic yoke.
- the moving part of the magnetic circuit permeable is rotated, which turns out particularly suitable since, depending on the position of the axis of rotation and the geometry of the pallet, we can consider reducing the air gap medium while maintaining an equal useful stroke for said pallet or at least its active portion: taking into account the specificities traditional magnetic circuit, the useful force will be there significantly increased.
- the movable pallet is bent, the axis of rotation being arranged at the elbow separating two straight portions of said pallet, one of said portions being arranged so that it closes the magnetic circuit of the U-shaped yoke and presents a gap with at least one of the branches of said cylinder head.
- the elbow is particularly useful to allow keep an appropriate length for the thermal bimetallic strip, length it would have been difficult to accommodate when deployed in a modular enclosure.
- the section which is not directly used in the magnetic circuit can be used for adjustment of the bimetallic strip.
- the return means associated with the movable pallet consist of a torsion spring, arranged in the elbow separating the two straight-looking portions of said palette, one of which ends is fixed to the latter and the other end is integral with the electrical equipment box.
- the housing (B) of the electrical equipment is figured in transparency, devoid of its usual components to except for the magnetic sub-assembly.
- This includes a spiral coil (1), a portion of fixed magnetic circuit composed a core (2) and two parallel branches (3) of planar appearance, and a bent mobile pallet (4), in this case a bimetallic strip.
- the width of the magnetic yoke which can be raised by example at the level of the parallel branches (3) is such that this subset magnetic is insertable in protective devices half-modules.
- the pallet (4) is movable in rotation around an axis located in the bent part (see below).
- the position relative pallet (4) / branches (3) of the fixed circuit is as shown in FIG. 2a: in this case, obviously very diagrammatically, the portion (4a) of the pallet (4) participating in the magnetic circuit is not moved, and a nominal air gap is present between one of the branches (3) and said portion (4a).
- the second portion (4b) located on the other side of the elbow is well heard also motionless.
- a return spring (5) brings the movable pallet (4) in normal operating position outside any overload or overcurrent.
- An adjustment member (6) of the bimetallic strip (4) cooperates with said party (4b), in particular for the purpose of settling its sensitivity.
- This member (6) is preferably a simple screw which supports on the end surface of the portion (4b), acting as a stop adjustable.
- the arrow (7) symbolizes the trigger arm secured to the lock (not shown in this figure).
- the portion (4a) mobile is at a distance from this arm (7), since the operation is normal.
- a trigger occurs by contact between the portion (4a) of the pallet (4) and said arm (7).
- the case shown in Figure 2b is that of an overload: the bimetallic strip (4) heats up, and the pallet (4) moves by deformation of the portion (4a), which comes into contact with the member (7) and consequently causes the disjunction.
- the only elements of the invention which appear in FIG. 3 are the coil (1) spiral and the pallet (4) which plays the role of bimetal.
- the electrical circuit of a circuit breaker taken as an example of modular line protection device, develops between two terminals (8, 9) in which the external conductors of the line. These terminals (8, 9), and more generally the elements of said circuit which are not specific to the invention, are well known and do not the subject of a detailed description.
- the terminal (9) is connected via a conductive braid (10) to the pallet / bimetal strip (4) at its portion (4b) which corresponds substantially at one end of the bimetallic strip (4).
- the other end is connected, also via a conductive braid (11), to one of the ends of the coil (1).
- the fixed contact (12), extended by a sheet arc conduction (14) is secured to the other end of the coil (1).
- the configuration described illustrates a case in which the heating of the bimetallic strip (4) is direct.
- the movable contact (13), integral with a trigger lock (not shown), is electrically connected by means of a braid flexible (15) to a conductive sheet (16) connected on the one hand to the second terminal (8) and secondly to a second conduction sheet arch (17).
- the bimetallic strip (4) deforms, but the coil (1), also traversed by a current greater than that which crosses it in normal operation, increases the flux in the magnetic circuit, and creates a synergistic effect with said deformation to ensure the disjunction of the contacts (12, 13).
- the bimetallic strip (4) does not have time to heat the flux in the magnetic circuit (see figure 2c) rotates it around the axis (A) and produces the tilting of the movable contact (13).
- FIG. 4 The same elements as in FIG. 3 appear in FIG. 4, with the fixed part of the magnetic circuit, i.e. the core (2) and the arms (3) between which is wound the coil (1).
- Plates (18, 19) with a flat appearance extend downwards and the sides the branches (3), although being distinct from the latter. They have in particular for the function of channeling the magnetic field for a additional function for guiding and blowing the electric arc created at opening of contacts, which is however not the subject of this invention.
- these sheets (18, 19) allow the opening speed of the contacts (12, 13) to be increased by providing a magnetic effect identical to that which applies to the arc electric created at the time of opening.
- this circuit breaker comprises a lever (22) handling connected in particular via a link (23) to a rotary lock (24) of which the movable contact (13) is integral.
- This lock (24) which can be tilted using return means, has an arm (7) or a protuberance which, when touched by the pallet (4) during movement, tilts it.
- the half-shell (20) induces a first branch (3), the core (1) of the magnetic circuit, which we can clearly see here consists of a stack of sheets, as well as the fixed contact (12).
- the deionization plates (27, 28) allow the arc to be extinguished electric which is created when the contacts (12, 13) are opened.
- An insulating middle wall (25) is then placed on these elements, allowing in particular to isolate the coil from the magnetic core (1) and of the first branch (3).
- a second insulation element (26) is arranged between the coil (1) and the second branch (3), of the fixed magnetic circuit.
- the second half-hull (21) is then closed, and the product is thus mounted.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Soft Magnetic Materials (AREA)
- Hard Magnetic Materials (AREA)
- Electromagnets (AREA)
Description
dont l'agencement relatif permet d'augmenter sensiblement la force utile de l'élément provoquant le déclenchement.
- la figure 1 est une vue en perspective d'un sous-ensemble magnétique selon l'invention disposé dans un appareillage électrique de protection de lignes demi-module ;
- les figures 2a à 2c sont des schémas fonctionnels montrant la position relative des portions fixe et mobile du circuit magnétique en cas de surcharge et en cas de court-circuit ;
- la figure 3 représente une vue perspective du circuit électrique auquel s'applique l'invention :
- la figure 4 est une vue en perspective des dispositions relatives du circuit électrique et du circuit magnétique ; et
- la figure 5 est une vue en perspective éclatée de la totalité de l'appareillage demi-module de l'invention.
Claims (10)
- Sous-ensemble magnétique pour appareillage électrique modulaire de type disjoncteur comportant un contact fixe (12) et un contact mobile (13) solidaire d'une serrure de déclenchement, ledit sous-ensemble étant composé d'une bobine d'induction (1) montée dans une culasse magnétique munie d'un dispositif de déclenchement de la serrure en vue de séparer le contact mobile (13) du contact fixe (12) en cas de surintensité, présentant une configuration plane avec une bobine en spirale (1) à au moins une couche d'enroulement coopérant avec une culasse magnétique en U comportant un noyau (2) se développant selon l'axe de la bobine (1) et deux branches (3) s'étendent radialement vers la périphérie de ladite bobine (1), le bord libre d'au moins une des branches (3) étant séparé d'une palette (4) fermant le circuit magnétique par un entrefer, ladite palette (4) étant mobile par rapport aux branches (3), apte à actionner ladite serrure pour la faire déclencher en cas de surintensité, et contrôlée par des moyens de rappel (7) la ramenant à distance de ladite serrure en l'absence de surintensité, caractérisé en ce que la palette (4) mobile est un bilame se déformant sous l'effet de la chaleur provoquée par une surintensité.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon la revendication précédente, caractérisé en ce que les extémités dudit bilame (4) sont électriquement reliées d'une part à une des bornes (9) de l'appareillage électrique et d'autre part à la bobine (1) en spirale.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit noyau (2) de la culasse magnétique est constitué de tôles empilées, les branches (3) étant d'allure plane.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon l'une des revendications 1 et 2, caractérisé en ce que le noyau (2) de la culasse magnétique est massif.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon l'une quelconque des revendications précédentes, caractérisé en ce que une portion (4a) de la palette mobile (4) est positionnée à proximité d'un bras (7) de déclenchement de la serrure, lequel est actionné par ladite une portion (4a) lorsque la palette (4) se rapproche d'au moins une des branches (3) de la culasse magnétique, sous l'effet de l'augmentation du flux dans le circuit magnétique.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon la revendication précédente, caractérisé en ce qu'au moins une portion du bras (7) de déclenchement de la serrure est disposée entre les deux branches (3) de la culasse magnétique.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon l'une quelconque des revendications précédentes, caractérisé en ce que la palette (4) est mobile en rotation autour d'un axe (A) parallèle à l'axe de la bobine (1) en spirale, ledit axe (A) étant situé au voisinage de l'extrémité de l'une des branches (3) à l'extérieur de la culasse magnétique en U.
- Sous-ensemble magnétique pour appareillage électrique modulaire selon la revendication précédente, caractérisé en ce que la palette (4) mobile est coudée, l'axe (A) de rotation étant disposé au niveau du coude séparant deux portions rectilignes (4a, 4b) de ladite palette (4), l'une desdites portions (4a) étant disposée de telle sorte qu'elle ferme le circuit magnétique fermé de la culasse en U et présente un entrefer avec au moins l'une des branches (3) de ladite culasse, l'autre portion permettant un réglage du bilame (4).
- Sous-ensemble magnétique pour appareillage électrique modulaire selon la revendication précédente, caractérisé en ce que les moyens de rappel associés à la palette mobile consistent en un ressort de torsion (5) disposé dans le coude séparant les deux portions (4a, 4b) d'allure rectiligne de ladite palette (4), dont l'une des extrémités est fixée à cette dernière et l'autre extrémité est solidaire du boítier (B) de l'appareillage électrique.
- Appareillage électrique demi module du type disjoncteur comportant un sous-ensemble magnétique selon les revendications précédentes.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00440202T ATE218749T1 (de) | 2000-06-30 | 2000-06-30 | Magnetische baugruppe für ein elektrisches gerät mit einer begrenzten breite |
PT00440202T PT1168402E (pt) | 2000-06-30 | 2000-06-30 | Subconjunto magnetico para aparelho electrico modular de espessura reduzida |
DE60000200T DE60000200T2 (de) | 2000-06-30 | 2000-06-30 | Magnetische Baugruppe für ein elektrisches Gerät mit einer begrenzten Breite |
EP00440202A EP1168402B9 (fr) | 2000-06-30 | 2000-06-30 | Sous-ensemble magnétique pour appareil électrique modulaire d'épaisseur réduite. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00440202A EP1168402B9 (fr) | 2000-06-30 | 2000-06-30 | Sous-ensemble magnétique pour appareil électrique modulaire d'épaisseur réduite. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1168402A1 EP1168402A1 (fr) | 2002-01-02 |
EP1168402B1 true EP1168402B1 (fr) | 2002-06-05 |
EP1168402B9 EP1168402B9 (fr) | 2002-12-11 |
Family
ID=8174146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00440202A Expired - Lifetime EP1168402B9 (fr) | 2000-06-30 | 2000-06-30 | Sous-ensemble magnétique pour appareil électrique modulaire d'épaisseur réduite. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1168402B9 (fr) |
AT (1) | ATE218749T1 (fr) |
DE (1) | DE60000200T2 (fr) |
PT (1) | PT1168402E (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10226555B4 (de) * | 2002-06-14 | 2004-05-19 | Geyer Ag | Selbstschalter mit Magnetauslöser |
FR2883098B1 (fr) * | 2005-03-09 | 2008-05-09 | Hager Electro | Sous-ensemble magnetique plat |
FR2994274B1 (fr) * | 2012-07-31 | 2015-09-04 | Hager Electro Sas | Dispositif de mesure de courant circulant dans un conducteur |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE457673C (de) * | 1921-04-23 | 1928-05-23 | Siemens Schuckertwerke Akt Ges | Selbsttaetiger Hoechststromschalter, dessen arbeitende Teile zwischen zwei parallelen Platten angeordnet sind |
GB369740A (en) * | 1931-03-17 | 1932-03-31 | John Westmoreland Record | Improvements in or relating to electric circuit breakers or like circuit rupturing apparatus |
FR785058A (fr) * | 1934-02-02 | 1935-08-01 | Electric Auto Lite Co | Perfectionnements aux disjoncteurs automatiques |
DE1538331B2 (de) * | 1966-04-23 | 1971-09-16 | Brown, Boven & Cie AG, 6800 Mann heim | Leitungsschutzschalter |
DE6930682U (de) * | 1969-07-31 | 1970-01-08 | Eberle Werke Kg | Stromrelais |
JPS5669745A (en) * | 1979-11-10 | 1981-06-11 | Terasaki Denki Sangyo Kk | Circuit breaker |
-
2000
- 2000-06-30 DE DE60000200T patent/DE60000200T2/de not_active Expired - Lifetime
- 2000-06-30 AT AT00440202T patent/ATE218749T1/de not_active IP Right Cessation
- 2000-06-30 PT PT00440202T patent/PT1168402E/pt unknown
- 2000-06-30 EP EP00440202A patent/EP1168402B9/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE218749T1 (de) | 2002-06-15 |
EP1168402A1 (fr) | 2002-01-02 |
DE60000200T2 (de) | 2003-02-13 |
EP1168402B9 (fr) | 2002-12-11 |
PT1168402E (pt) | 2002-10-31 |
DE60000200D1 (de) | 2002-07-11 |
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