EP2686862B1 - Système magnétique et commutateur d'installation - Google Patents

Système magnétique et commutateur d'installation Download PDF

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Publication number
EP2686862B1
EP2686862B1 EP12707758.4A EP12707758A EP2686862B1 EP 2686862 B1 EP2686862 B1 EP 2686862B1 EP 12707758 A EP12707758 A EP 12707758A EP 2686862 B1 EP2686862 B1 EP 2686862B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
magnet
circuit breaker
armature
conductor piece
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.)
Active
Application number
EP12707758.4A
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German (de)
English (en)
Other versions
EP2686862A1 (fr
Inventor
Ralf Wieland
Wolfgang Pump
Klaus-Peter Eppe
Rainer Ludovici
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 AG Germany
Original Assignee
ABB AG Germany
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
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Publication of EP2686862A1 publication Critical patent/EP2686862A1/fr
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Publication of EP2686862B1 publication Critical patent/EP2686862B1/fr
Active 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the invention relates to a circuit breaker with an insulating material housing and with a magnet system having a yoke, a coil, a sleeve, a magnetic core, a plunger, a magnet armature and a restraint spring, wherein on the yoke, a conductor piece is formed, which carries a fixed contact piece, and wherein the magnet armature is slidably guided in the sleeve against the force of the fetlock spring, the magnet core being fixed to the conductor piece, the sleeve engaging the magnet core at its first end, and the magnet armature engaging the second end of the sleeve the sleeve is on and executable, according to the preamble of claim 1.
  • the invention further relates to a method for producing such a circuit breaker.
  • a magnet system for a circuit breaker is for example in the DE 198 45 476 A1 shown.
  • the DE 85 27 361 U1 shows an electromagnetically actuated short-circuit release member for installation in a provided with an arc extinguishing device circuit breaker with a control coil, lying therein magnetic core, and a firing pin.
  • the excitation coil is surrounded by a magnetic yoke frame-shaped.
  • the arc extinguishing device is arranged next to the short-circuit release member and is essentially composed of a splitter stack and two parallel, this flanking arc guide.
  • the sheet-metal-side leg of the magnetic yoke is formed by the magnet-side arc guide plate.
  • the DE 36 19 239 A1 shows a magnetic quick release for circuit breaker, wherein the magnetic yoke of an approximately U-shaped bow-shaped magnetic angle with bottom part and upstanding legs and a front side End plate with the one piece angled contact piece consists.
  • a retaining claw is bent laterally from the bottom part of the magnetic angle, which engages over the recess for the magnet armature from the outside and holds together the assembly of armature, trip rod and return spring during assembly on the magnetic yoke.
  • the quick release thus forms an easy-to-use pre-assembled assembly which can be inserted between the switch housing inwardly projecting support pin or support lugs and fixed in this manner in the switch housing, being ensured by a corresponding abutment web for the armature on the switch housing, that after assembly of the Quick release between the armature and the retaining claw an air gap is present to ensure in this way the magnetic flux when the switch is triggered.
  • the US Pat. No. 6,577,217 B1 shows a magnet subassembly for a modular electrical device of the circuit breaker type.
  • a yoke with a leg is at least partially integrated within the internal volume of an induction coil so that a range of the axial dimensions of the coil is allowed through the yoke.
  • One end of the coil is oriented so that its attachment to a fixed contact also allows the range of axial dimensions.
  • the US 2010/026430 A1 shows a switching device, with a magnetic trip device, wherein the magnetic trip device comprises at least one armature, a coil, a yoke and a yoke sleeve, wherein the armature and the yoke sleeve are arranged substantially in alignment, wherein the coil substantially around the armature and / or the yoke sleeve is arranged around, wherein the yoke is arranged around the coil, and wherein the armature is provided for at least indirectly triggering a separation device of the switching device. It is proposed to reduce the production, energy and raw materials expenditure for the production of the switching device, that the yoke sleeve is formed by at least one first bent part.
  • Circuit breakers with magnetic systems are used in electrical engineering to protect circuits against overload, z. As by short circuits or the like, and are used to automatically disconnect a line, ie, they trigger when such overload occurs.
  • a magnet system is used to trip the circuit breaker.
  • the magnet system has a movable armature, which in the rest position partially protrudes into a current-carrying coil flowing from the current in the line to be monitored. If the current in the coil is greater than a predetermined tripping current, the armature is displaced by the resulting magnetic field of the coil and triggers the circuit breaker via a plunger.
  • the trigger member ie armature and plunger must be held by a fetlock spring in a defined rest position to ensure a defined response of the circuit breaker and to avoid false triggering. Consequently, the magnet system must contain a plurality of different mechanical parts to ensure this reliability. To assemble this plurality of mechanical parts is time consuming and consequently expensive. For compliance with a predetermined triggering behavior, it is also significant that the air gap of the magnetic circuit of the magnet system is as independent of tolerances in manufacturing adjustable, which is why known magnetic systems sometimes quite expensive design measures provide for this.
  • two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are designed as a stop for the armature, two spaced apart the thickness of the conductor piece side by side integrally formed on the inside of the housing webs together form the first bearing member, and wherein the air gap of the magnet system determining distance between the magnetic core and the armature by the distance between the two bearing members can be fixed.
  • An inventive circuit breaker has with respect to the magnet system very few items that partially take multiple functions, this is very easy to assemble, even fully automatically at high speed.
  • the magnetic core in addition to its actual function as a magnetic core in the magnetic circuit of the magnet system still fulfills the function of a holding member for the sleeve.
  • a separate support device for the magnet system is not required, since the magnetic core is attached to the conductor piece, and the conductor piece, since it carries the fixed contact piece, must be held in the housing of the service switching device anyway.
  • the magnet system is held on the holder of the conductor piece with the fixed contact when mounted in the housing, the sleeve is held over the magnetic core, and the armature is held in the sleeve.
  • a rearward stop for the armature can be provided outside the magnet system, as the armature is insertable and executable into the sleeve at the second end of the sleeve. Therefore, the magnet system of the circuit breaker according to the invention is suitable for determining the distance between the magnet core and the magnet armature which determines the air gap of the magnet system by stop means located outside the magnet system and thus can be adjusted independently of manufacturing tolerances of the magnet system.
  • two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are formed as a stop for the armature.
  • the first bearing member may be formed, for example, by two spaced apart the thickness of the conductor piece side by side on the inside of the housing webs, between which the conductor piece is clamped for attachment.
  • the second bearing member may be a shoulder on the inside of the housing, which serves as a stop for the armature, that is, the armature can not stand in the rest of the fetlock spring up to this stop be pushed out of the sleeve.
  • the distance between the magnetic core and the armature determining the air gap of the magnet system can be determined by the distance between the two bearing members.
  • the air gap of the magnetic circuit, so the distance between the magnetic core and the armature, is thus determined via two contact points in the housing. These bearing points can be kept in the housing exactly to each other, which has the consequence that according to the invention the air gap is tolerance independent.
  • the magnetic core has a penetrated by the plunger bore.
  • This hole also acts as a guide member for the plunger, so that an independent guide member, as required in the prior art, is eliminated.
  • the bore is a stepped longitudinal bore with a larger diameter at the end facing away from the conductor piece end, and the diameter step forms a first stop for the fetlock spring.
  • the outer surface of the magnetic core at least in the region of engagement with the sleeve, has a surface configuration which increases the friction between the magnetic core and the sleeve in this region.
  • This can be done for example by an external circumferential structuring of the outer surface, such as a kind of corrugation or roughening over which the sleeve is pushed and thereby better holds, without a further fastening means, such as an adhesive layer, must be provided.
  • the plunger is inserted into a blind hole-like depression on an end face of the armature and secured therein. This can be realized for example by the fact that the plunger is pressed into the armature. This has the advantageous effect of an optimized, better return of the armature.
  • Such a invention to be provided Measure has a particularly favorable effect on the tolerances in the flow.
  • the end face of the magnet armature forms the second stop for the fetlock spring.
  • it advantageously has no contouring, that is to say in particular no hole or milled recess, in order to receive the fetlock spring.
  • the restraining spring lies against the smooth end face. This has the beneficial effect of undisturbed and thus further improved magnetic properties of the magnetic circuit of the magnet system, which in particular a higher armature force is effected.
  • the magnetic core is riveted to the conductor piece.
  • FIG. 1 shows a magnet system 1, as constructed according to the invention and in a circuit breaker 2, see Fig. 2 and 3 , is used. Further details and other components of a circuit breaker, which are usually present in such, such as rear derailleur, overcurrent release, arc quenching device with arc guide rails and arc splitter stack and so on are not shown here.
  • the magnet system 1 has a yoke 3, here an L-shaped metal yoke, with a long leg 21 and an approximately right angle bent thereon short leg 22nd
  • a conductor piece 10 is welded flat.
  • the conductor piece 10 carries a fixed contact piece 11 and extends in the extension of the short leg 22 downwards, where it ends in an approximately U-shaped curvature, which forms a Fest.leitschiene.
  • the conductor piece 10 is formed with a first plate 23 which is welded directly to the short leg 22. At the first plate 23 is projecting at an angle of approximately 45 ° projecting a second plate 24, which thus extends obliquely downwards. To the second plate 24, the U-shaped curvature 25 is formed.
  • FIG. 2 is schematically shown a contact lever 27 with a movable contact piece 28 which forms the contact point of the circuit breaker 2 with the fixed contact piece 11 and from which a movable strand 29 emanates, which continues the current path in the circuit breaker inside.
  • the short leg 22 and the conductor piece 10 each have a bore which lie one above the other in welded state and thus form a common passage through the conductor piece 10 and the short leg 22.
  • the magnetic core consists of a ferromagnetic material and has a cylindrical outer contour and a stepped longitudinal bore 14. The larger diameter is located on the side facing away from the conductor piece 10 side, the smaller diameter is located on the conductor piece 10 side facing.
  • the diameter step 15 forms a stop for a cylinder spring 9, which acts as a restraining spring.
  • the restraint spring 9 is inserted from the side of the larger diameter ago in the longitudinal bore 14 until it comes to the stop at the diameter stage 15.
  • a coil tube, also referred to as sleeve 5, made of insulating plastic material is pushed from the outside over the outer surface of the magnetic core 6.
  • the outer surface of the magnetic core 6 has a surface contouring, such as a corrugation, which the frictional force between the outer surface of the magnetic core 6 and the inner surface of the Sleeve 5 increases.
  • the sleeve is pushed with a certain interference fit on the outer surface of the magnetic core 6, supported by the surface contouring and thereby increased sliding and static friction holds the sleeve 5 then on its own on the magnetic core 6, there is no further operation for securing the sleeve fifth on the magnetic core 6 of need.
  • the coil 4 is pushed, which is traversed by the current flowing through the circuit breaker current.
  • this coil can have more or fewer turns with different cross-sections. In the example shown here, the coil has only 3 turns and a large, rectangular cross-section. It is thus suitable for switching off a large short-circuit current.
  • the coil 4 is connected via a first connection conductor 26 to the second plate 24 of the conductor piece 10. Both are welded directly to each other, resulting in a low contact resistance and an overall low electrical resistance of the current path.
  • the first connection conductor 26 also forms an angle of approximately 45 ° with the first plate 23.
  • This oblique course of the connecting conductor 26 and the second plate 24 has the following advantage.
  • the magnetic field associated with this looping action acts on the arc to propel it away from the pad and toward the baffles and arc splitter stack (not shown in the figures herein); It is also said that the arc is blown away, and the configuration of first terminal conductor 26, second plate 24 and movable contact lever 27 with strand is also referred to as Blasschleife. Due to the oblique course of the second plate 24 and the first connecting conductor 26, the blown loop here has a wide opening, it creates a large Blasschleife, which is advantageous in terms of a strong Blasooth.
  • connection conductor 33 At the other end of the coil 4 is a second connection conductor 33, which is connected to a connection terminal 34.
  • the magnet armature 8 has a cylindrical shape, with an outer diameter, which is dimensioned so that it can easily slide along with its outer surface on the inner surface of the sleeve 5, without forming a too large air gap.
  • the end face of the magnet armature 8 has no further surface contour.
  • the end face thus represents in the embodiment according to the invention a smooth surface. This is advantageous because it results in a higher anchor force. Because decisive for the height of the magnetic force, the anchor force, the area in the region of the air gap and the air gap width.
  • the inventive design results in a large anchor surface in the region of the air gap and thus in a large anchor force.
  • the restraint spring 9 is pushed over the pressed into the armature 8 plunger 7. From the open side of the sleeve 5 ago then the armature, with the plunger 7 ahead, inserted into the sleeve 5. The smaller diameter is just so large that the plunger 7, which is connected to the armature 8, can slide therethrough. The plunger 7 thus slides through the bore 17 until it looks out at the opening in the conductor piece 10 a piece. The restraint spring reaches the diameter step.
  • the armature 8 looks at the free end of the sleeve 5 a little way beyond the sleeve 5 addition.
  • the width of the air gap of the magnetic circuit of the magnetic system 1 can be fixed by the distance of the end face of the armature 8 of the magnetic core 6.
  • the plunger is driven to the left out of the sleeve and can open the contact lever to open the contact point.
  • the magnet system 1 is inserted into the circuit breaker 2, and thereby the conductor piece 10 between two spaced apart the thickness of the conductor piece side by side on the inside of the housing molded webs 34, 35th , which together form a first bearing member 18, introduced and held, while a paragraph 19, also referred to as a second bearing member 19, serves as a stop for the magnet armature 8 on the inside of the housing.
  • the width of the air gap is thus determined by the distance between two bearing members 18, 19 or contact points in the housing, not by parts of the magnet system itself.
  • the contact points 18, 19 connected to the housing can be adjusted to each other by precise housing production in an exact position and maintained with high reproducibility be, whereby the air gap is independent of manufacturing tolerances of the magnet system.
  • the magnet system according to the invention is very simple and easy to assemble.
  • the magnet system is built up step by step on the yoke. First, the magnetic core is riveted to the yoke. The sleeve is pushed onto the magnetic core, the magnet armature with the plunger are pushed into the sleeve, the coil we pushed over it, all together is inserted into the housing. It is not necessary to produce complicated assembled subassemblies and then assemble them.
  • the critical parameter of the air gap width is adjustable by a housing size, namely the set outside the magnet system distance between the two contact points for the conductor piece on the one hand and the armature on the other hand, with low tolerance.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)

Claims (8)

  1. Disjoncteur de ligne (2), comprenant un boîtier en matériau isolant (20) et comprenant un système magnétique (1) muni d'une culasse (3), d'une bobine (4), d'une douille (5), d'un noyau magnétique (6), d'un coulisseau (7), d'un induit magnétique (8) et d'un ressort captif (9), une pièce conductrice (10) étant formée sur la culasse (3), laquelle comporte une pièce de contact fixe (11), et l'induit magnétique (8) étant guidé en coulissement dans la douille (5) contre la force du ressort captif (9), le noyau magnétique (6) étant fixé à la pièce conductrice (10), la douille (5) étant en prise par sa première extrémité avec le noyau magnétique (6), et l'induit magnétique (8) pouvant être introduit dans la douille (5) et en être sorti au niveau de la deuxième extrémité de la douille (5), caractérisé en ce que sur le côté intérieur du boîtier en matériau isolant (20) sont formés deux organes de support (18, 19) à un écart fixe l'un de l'autre, le premier organe de support (18) étant configuré pour arrêter la pièce conductrice (10) et le deuxième organe de support (19) en tant que butée pour l'induit magnétique (8), deux éléments jointifs (34, 35) façonnés l'un à côté de l'autre à distance de l'épaisseur de la pièce conductrice (10) sur le côté intérieur du boîtier formant le premier organe de support (18), et en ce que l'écart entre le noyau magnétique (6) et l'induit magnétique (8), qui détermine l'entrefer du système magnétique (1), peut être défini par l'écart entre les deux organes de support (18, 19).
  2. Disjoncteur de ligne (2) selon la revendication 1, caractérisé en ce que le noyau magnétique (6) possède un alésage traversé par le coulisseau (7).
  3. Disjoncteur de ligne (2) selon la revendication 2, caractérisé en ce que l'alésage est un alésage longitudinal étagé avec un diamètre plus grand à l'extrémité qui se trouve à l'opposé de la pièce conductrice (10), et en ce que le palier de diamètre forme une première butée pour le ressort captif (9).
  4. Disjoncteur de ligne (2) selon la revendication 1, caractérisé en ce que la surface extérieure du noyau magnétique (6) possède au moins dans la zone de la prise avec la douille (5) une configuration de surface qui augmente la friction du noyau magnétique (6) et de la douille (5) dans cette zone.
  5. Disjoncteur de ligne (2) selon la revendication 1, caractérisé en ce que le coulisseau (7) est introduit dans un enfoncement en trou borgne sur un côté frontal de l'induit magnétique (8) et est fixé dans celui-ci.
  6. Disjoncteur de ligne (2) selon la revendication 3, caractérisé en ce que le côté frontal de l'induit magnétique (8) forme la deuxième butée pour le ressort captif (9).
  7. Disjoncteur de ligne (2) selon la revendication 1, caractérisé en ce que le noyau magnétique (6) est fixé par rivetage à la pièce conductrice (10).
  8. Procédé de fabrication d'un disjoncteur de ligne (2) selon la revendication 1, caractérisé en ce qu'il comprend les étapes suivantes :
    - formation de deux organes de support (18, 19) sur le côté intérieur du boîtier en matériau isolant (20) à un écart fixe l'un de l'autre, le premier organe de support (18) étant formé par deux éléments jointifs (34, 35) façonnés l'un à côté de l'autre à distance de l'épaisseur de la pièce conductrice (10) sur le côté intérieur du boîtier,
    - fixation du noyau magnétique (6) à la pièce conductrice (10),
    - emmanchement de la douille (5) sur le noyau magnétique (6),
    - emmanchement du ressort captif (9) sur le coulisseau (7) formé sur l'induit magnétique (8),
    - insertion de l'induit magnétique (8), sur lequel est formé le coulisseau (7) et sur lequel est emmanché le ressort captif (9), dans la douille (5),
    - introduction, dans le boîtier d'un appareillage d'installation, de l'unité formée par le noyau magnétique (6), la pièce conductrice (10), la douille (5) dans laquelle est inséré le noyau magnétique (6).
EP12707758.4A 2011-03-16 2012-03-07 Système magnétique et commutateur d'installation Active EP2686862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011014061A DE102011014061B4 (de) 2011-03-16 2011-03-16 Leitungsschutzschalter und Verfahren zum Herstellen eines Leitungsschutzschalters
PCT/EP2012/053906 WO2012123307A1 (fr) 2011-03-16 2012-03-07 Système magnétique et appareil de commutation d'installation

Publications (2)

Publication Number Publication Date
EP2686862A1 EP2686862A1 (fr) 2014-01-22
EP2686862B1 true EP2686862B1 (fr) 2016-10-26

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ID=45811500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12707758.4A Active EP2686862B1 (fr) 2011-03-16 2012-03-07 Système magnétique et commutateur d'installation

Country Status (5)

Country Link
EP (1) EP2686862B1 (fr)
CN (1) CN103477412B (fr)
AR (1) AR088725A1 (fr)
DE (1) DE102011014061B4 (fr)
WO (1) WO2012123307A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014670B4 (de) * 2012-07-25 2014-05-22 Abb Ag Magnetsystem und Installationsschaltgerät als Leitungsschutzschalter und Herstellungsverfahren
CN103545151A (zh) * 2013-10-30 2014-01-29 桂林机床电器有限公司 线路保护开关
CN114023614B (zh) * 2021-10-29 2023-12-22 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） 一种大范围可调电磁短路脱扣器

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Publication number Priority date Publication date Assignee Title
DE8527361U1 (de) * 1985-09-25 1986-01-09 Lindner Gmbh, Fabrik Elektrischer Lampen Und Apparate, 8600 Bamberg Kurzschlußauslöseorgan
DE3619239A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Schnellausloeser fuer leitungsschutzschalter
FR2779567B1 (fr) * 1998-06-03 2000-07-13 Hager Electro Sous-ensemble magnetique optimise
FR2779568B1 (fr) * 1998-06-04 2000-07-13 Schneider Electric Ind Sa Dispositif de coupure electrique comprenant un dispositif de declenchement differentiel et disjoncteur comprenant un tel dispositif
DE19845476B4 (de) 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetsystem für Leitungsschutzschalter
AT412926B (de) * 2001-03-20 2005-08-25 Moeller Gebaeudeautomation Kg Joch für ein magnetsystem einer kurzschlussauslöseeinrichtung
FR2840448B1 (fr) * 2002-05-30 2004-07-23 Schneider Electric Ind Sas Dispositif de protection contre les surtensions
DE102004056281A1 (de) * 2004-11-22 2006-06-08 Abb Patent Gmbh Schaltgerät mit einem elektromagnetischen Auslöser
AT509279A1 (de) * 2008-07-31 2011-07-15 Moeller Gebaeudeautomation Gmbh Schaltgerät

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
CN103477412A (zh) 2013-12-25
DE102011014061B4 (de) 2013-11-28
AR088725A1 (es) 2014-07-02
CN103477412B (zh) 2016-03-23
EP2686862A1 (fr) 2014-01-22
WO2012123307A1 (fr) 2012-09-20
DE102011014061A1 (de) 2012-09-20

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