EP2590193B1 - Agencement d'aimant pour un commutateur basse tension - Google Patents

Agencement d'aimant pour un commutateur basse tension Download PDF

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Publication number
EP2590193B1
EP2590193B1 EP20110187846 EP11187846A EP2590193B1 EP 2590193 B1 EP2590193 B1 EP 2590193B1 EP 20110187846 EP20110187846 EP 20110187846 EP 11187846 A EP11187846 A EP 11187846A EP 2590193 B1 EP2590193 B1 EP 2590193B1
Authority
EP
European Patent Office
Prior art keywords
chamber
metal sheet
magnet arrangement
arrangement according
switch
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
EP20110187846
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German (de)
English (en)
Other versions
EP2590193A1 (fr
Inventor
Gerhard Schneider
Thomas Wulf
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 Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to ES11187846.8T priority Critical patent/ES2501666T3/es
Priority to EP20110187846 priority patent/EP2590193B1/fr
Priority to US13/669,152 priority patent/US9076606B2/en
Priority to CN201210435063.0A priority patent/CN103093987B/zh
Publication of EP2590193A1 publication Critical patent/EP2590193A1/fr
Application granted granted Critical
Publication of EP2590193B1 publication Critical patent/EP2590193B1/fr
Active 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
    • 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
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention relates to a magnet assembly according to the introductory part of claim 1 and to a low-voltage switch containing such a magnet assembly.
  • such magnet arrangements are used in an antechamber located between an interruption point and an arc extinguishing chamber in order to improve the running properties of the switching arc formed when a short-circuit or overcurrent is interrupted.
  • the effective magnetic induction on the switching arc is determined here in particular by the geometry, the polarity, the magnetic material used and the magnetization of the permanent magnet in an open magnetic circuit.
  • a magnet arrangement of the aforementioned type is in EP 1 998 350 B1 described.
  • This magnet arrangement has two iron plates laterally adjacent to a pre-chamber of a low-voltage switch and a permanent magnet which feeds magnetic flux into the two iron plates.
  • the magnetic induction of an open magnetic circuit acting in the antechamber between the two iron plates is used to improve the running characteristics of a switching arc formed upon the interruption of a direct current.
  • an arc quenching device for a low-voltage circuit breaker with double interruption in which the running characteristics of two formed when interrupting an alternating switching arcs, which in the interruption process each pass through two pre-chambers, are improved by means of two each one of the two antechambers associated coats of magnetic material.
  • Each jacket has U-profile and surrounds the associated pre-chamber laterally and adjacent to an arc runner leading to the lower foot of the switching arc.
  • the object is to provide a magnet assembly of the type mentioned for a low-voltage switch, which is characterized by a simple design and allows easy adjustment of the magnetic induction, and at the same time with a low-voltage switch to specify such a magnet arrangement.
  • a magnet assembly for improving the operating characteristics of a switching arc formed on opening a circuit in a pre-chamber of a low-voltage switch comprising a switching arc between two arc tracks, comprising an open magnetic circuit containing magnetic material and at least one permanent magnet for injecting magnetic flux into the circuit magnetic circuit forming a force acting on the switching arc in the antechamber magnetic induction.
  • the magnetic material is formed as a U-profile exhibiting, along the antechamber extending sheet and has a guided through this Vorhuntblech material recess in which the at least one permanent magnet is held.
  • the magnetic material By forming the magnetic material as a suitably shaped Vorhuntblech and by arranging the at least one permanent magnet in a material recess of Vorhuntblechs an easy-to-manufacture magnet assembly is achieved, which causes the desired improvement in the operating characteristics of the switching arc in the antechamber of a low-voltage switch with simple means.
  • the magnetic induction improving the running properties of the switching arc can now also be set extremely comfortably.
  • the material recess may be extended along a back connecting the two side surfaces of the U-profile.
  • the material recess may be bounded by a first web, which connects the two side surfaces of the U-profile with each other.
  • the material recess may additionally be delimited by a second web connecting the side surfaces.
  • the magnetic induction of the magnetic circuit acting in the prechamber may be adjustable by varying the geometric dimension of the first land.
  • Two pole faces of the at least one permanent magnet feeding the magnetic flux into the pre-chamber plate can protrude from the material recess on both sides of the prechamber plate.
  • the prechamber plate can be fastened, in particular plugged, on an electrically insulated prechamber insulation on a switching arc.
  • a label may be arranged, which designates the associated pole of the at least one permanent magnet.
  • Two side surfaces of the pre-chamber insulation, each associated with one of the two poles of the at least one permanent magnet, can have different colors, in particular achieved by coloring the material of the pre-chamber insulation.
  • the pre-chamber plate and / or the pre-chamber insulation can be held in a mounting unit of the low-voltage switch, in particular by plugging.
  • the invention also relates to a low-voltage switch with the aforementioned magnet arrangement.
  • the pre-chamber plate is mounted on a switching arc opposite the sheet electrically insulating Vorschisolation, and the Vorhuntblech and Vorhuntisolation part of a mounting unit of the low-voltage switch, such a switch can be in a particularly simple manufacture, maintain and retrofit when the mounting unit a fixable on a housing of the switch and optionally detachable from the switch housing housing part.
  • the assembly unit can be integrated into the switch housing with the aid of a form-fitting and force-locking fixing, preferably designed as riveting, screwing or pinning.
  • arc quenching device is disposed in an insulating housing 10 only partially shown and serves the deletion of two unillustrated switching arcs of a double-break, single or multi-pole low-voltage circuit breaker. It is constructed with respect to an electrically insulating partition wall 11 of the housing 10 largely mirror-symmetrical and has on both sides of the partition wall 11 each have a point of interruption with a fixed and a movable switching contact. Each of these two breakpoints interacts with one of two prechambers via two arc guide rails. Each chamber has one of two extinguishing chambers. Obviously, the double break switch is open.
  • Fig.1 is only the viewer facing interruption point 20 with a fixed 21 and a movable switching contact 22 can be seen. Shown are also a with the fixed switching contact 21 of the interruption point 20 via an arc guide rail 31 and the movable switching contact 22 of the interruption point 20 via an arc guide rail 32 cooperating antechamber 30 and the prechamber 30 is followed, quenching plates 41 containing quenching chamber 40th
  • a first power connection 51 of the switch is electrically conductively connected to its second power connection 55 via the following components: a current conductor 52, a blowout coil 53 of a short-circuit current release, a current conductor 54, the fixed switching contact 21, on a prong of a forked contact bridge 23 arranged movable switching contact 22, the contact bridge 23, the unseen second point of interruption, a non-apparent conductor and a non-designated overcurrent release.
  • a back 61 of the pre-chamber insulation 60 connecting the two side surfaces 62 of the U-profile extends along the arc guide rail 32 and delimits the pre-chamber 30 from the bottom.
  • the side surfaces 62 of the pre-chamber insulation 30 formed by the legs of the U-profile extend along the arc guide rails 31 and 32 and bound the pre-chamber 30 laterally.
  • Vorschblech 70 On the side facing away from the interior of the pre-chamber 30 side of the pre-chamber insulation 60 a likewise U-profile exhibiting Vorhuntblech 70 is arranged, which is formed of a magnetic material, such as typically soft iron or steel, and in a guided through the sheet material recess 71 a permanent magnet 80 takes.
  • the Vorschblech 70 can be made in procedural advantageous manner by punching from a flat magnetic sheet and plastic deformation of the stamped part. It can be plugged into the prechamber insulation 60 or attached to the prechamber insulation 60 and by snapping or Spreading its elastically deformable side surfaces 72 are attached to the prechamber insulation 60.
  • a short circuit or an overcurrent occurs in a circuit led from a voltage source via the power connection 55, the closed arc extinguishing device and the current connection 51 to a consumer, open as in Fig.1 illustrated the two interruption points 20 to form two in Fig.1 not shown switching arcs.
  • One of the two base points of the switching arc formed in the observer facing the front break point 20 commutes from the fixed switch contact 21 on the upper arc run rail 31 and the movable switch contact 32 on the lower arc runner 32. Due to self-generated magnetic forces migrates the switching arc along the rails 31, 32nd through the antechamber 30 into the quenching chamber 40 and is there cooled to the quenching plates 41, divided into partial arcs and deleted. Accordingly, the switching arc formed at the second breakpoint, not shown, behaves. The unwanted short-circuit or overcurrent is thus interrupted by deleting both switching arcs.
  • the Vorschblech 70 and the permanent magnet 80 form one in the FIGS. 2 and 3 magnified illustrated magnet assembly M, which improves the operating characteristics of the switching arc along the arc runners 31, 32 in the pre-chamber 30 in interrupting a direct current or a DC superimposed alternating current.
  • the magnet assembly M has an open magnetic circuit containing the prechamber sheet 80 into which the permanent magnet 80 feeds magnetic flux.
  • the material recess 71 is rectangular and formed by one of the two side surfaces resp. Leg 72 of the U-profile connecting back 73 out.
  • the longitudinal side of the rectangle run parallel to the back 73 and therefore form two comparatively large areas, through which at the north pole N resp. at the non-visible south pole S of the permanent magnet 80 of the magnetic flux is fed into the acting as an open magnetic circuit prechamber plate 70.
  • a separate fastening device for the permanent magnet 80 is not required since the permanent magnet in the material recess 71 is held in a stable position by the magnetic flux guided in the magnetic circuit.
  • two pole faces N and S of the permanent magnet 80 which feed the magnetic flux into the prechamber plate 70, project out of the material recess 71 on both sides of the prechamber plate 70. It can thus be achieved while maintaining a stable position of the permanent magnet 80 in the material recess 71, a large magnetic flux in the magnetic circuit. Since the areas of the material recess 71 formed by the longitudinal sides of the rectangle and the pole faces N, S of the feeding permanent magnet 80 can be snapped together virtually without gaps, a comparatively high proportion of the magnetic flux of the permanent magnet in the magnetic circuit resp. the prechamber plate 70 is fed. The majority of the injected magnetic flux is guided into the legs 72 of the prechamber plate 30, which act as magnetic poles, and acts with a comparatively high magnetic induction in the prechamber 30 located between the pole limbs 72 of the open magnetic circuit.
  • the magnetic induction acting in the antechamber 30 between the pole legs 72 supports and accelerates the switching arc during its movement on the arc runners 31, 32, even with comparatively small arc currents and a correspondingly small magnetic self-field.
  • the U-profile of the antechamber plate 70 can be designed geometrically almost arbitrary, provided that only a sufficient magnetic induction in the running region of the switching arc between the two pole legs 72 is ensured.
  • the magnetic induction between the two pole legs 72 can be influenced in a particularly simple manner in that the magnetic circuit has a shunt. This shunt is clearly achieved in that the two shorter side of the material recess 71 bounding rectangle respectively as web 74, respectively. 75 are executed.
  • the induction between the two pole legs 72 can be adjusted by the geometric configuration of the two webs 74, 75 with fully magnetized permanent magnet 80. It can be so much easier A defined magnetic induction in the antechamber 30 can be achieved.
  • a marking 76 a resp. 76 b which denotes the associated pole N of the permanent magnet 80.
  • the marking can be executed arbitrarily and in addition to letters, numbers or signs also include a coloring. Such coloration can be achieved in manufacturing technology advantageously by coloring the material of the pre-chamber insulation 60.
  • the prechamber plate 70 and the prechamber insulation 60 are held in a mounting unit E of the low voltage switch.
  • the mounting unit E has a fixable on the housing 10 of the switch and possibly also from the switch housing 10 detachable housing part 12. In this housing part 12 holes 13 are formed.
  • holes 14 are aligned with the holes 13
  • rivets are introduced into the holes 13, 14 and the parts 10 and 12 riveted together, whereby the housing part 12 and thus the mounting unit E fixed and integrated into the switch housing 10 are.
  • the housing part 12 can also be fixed by means of an elastically deformable connection on the switch housing 10.
  • Such a compound may comprise elastically deformable parts of the housing part 12 and / or the switch housing 10, the housing part 12 during assembly to form a plug resp. set a snap connection on the switch housing 10 and so integrate the mounting unit E in the switch.
  • the assembly unit E facilitates the manufacture and maintenance of the low-voltage circuit breaker substantially and at the same time allows to change the field of application of the switch with simple means, so that it can solve different switching tasks without significant effort.
  • the magnet assembly M may also include two or more than two permanent magnets instead of a single permanent magnet.
  • To achieve a large magnetic flux in the magnetic circuit of the permanent magnet may be the shape of a plate, respectively. Having a rod, but can also be designed as a horseshoe with a contour adapted to the curvature of the back 73 contour and with pole faces N, S, which feed the magnetic flux directly into the legs 72.
  • the magnet assembly M can also be installed in another low-voltage switch, such as a motor protection switch.
  • another low-voltage switch such as a motor protection switch.
  • two magnet arrangements according to the invention are generally used to improve the running properties of the two switching arcs formed at the two break points.
  • a single magnet arrangement according to the invention is sufficient to improve the running properties of the single switching arc formed when the current is interrupted.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (15)

  1. Arrangement d'aimant (M) pour améliorer les propriétés de propagation d'un arc électrique de commutation formé lors de l'ouverture d'un circuit électrique dans une préchambre (30) conduisant l'arc électrique de commutation entre deux glissières pour arc électrique (31, 32) d'un commutateur à basse tension, comprenant un circuit magnétique ouvert contenant un matériau magnétique et au moins un aimant permanent (80) pour injecter un flux magnétique dans le circuit magnétique en formant une induction magnétique agissant sur l'arc électrique de commutation dans la zone de la préchambre (30), caractérisé en ce que le matériau magnétique est réalisé sous la forme d'une tôle (70) présentant la forme d'un profilé en U et s'étendant le long de la préchambre (30) et présente un creux dans le matériau (71) qui passe à travers cette tôle de préchambre (70) et dans lequel est maintenu l'au moins un aimant permanent (80).
  2. Arrangement d'aimant selon la revendication 1, caractérisé en ce que le creux dans le matériau (71) s'étend le long d'un dos (73) qui relie les deux branches (72) du profilé en U.
  3. Arrangement d'aimant selon la revendication 2, caractérisé en ce que le creux dans le matériau (71) est délimité par une première traverse (75) qui relie ensemble les deux branches (72) du profilé en U.
  4. Arrangement d'aimant selon la revendication 3, caractérisé en ce que le creux dans le matériau (71) est délimité par une deuxième traverse (74) qui relie ensemble les deux branches (72) du profilé en U.
  5. Arrangement d'aimant selon l'une des revendications 3 ou 4, caractérisé en ce que l'induction magnétique du circuit magnétique qui agit dans la préchambre (30) est réglable en modifiant les dimensions géométriques de la première traverse (75).
  6. Arrangement d'aimant selon l'une des revendications 1 à 5, caractérisé en ce que deux faces polaires (N, S) de l'au moins un aimant permanent (80) qui injectent le flux magnétique dans la tôle de préchambre (70) font saillie hors du creux dans le matériau (71) des deux côtés de la tôle de préchambre (70).
  7. Arrangement d'aimant selon l'une des revendications 1 à 6, caractérisé en ce que la tôle de préchambre (70) est fixée sur une isolation de préchambre (60) qui isole électriquement l'arc électrique de commutation par rapport à la tôle (70).
  8. Arrangement d'aimant selon la revendication 7, caractérisé en ce que la tôle de préchambre (70) est emmanchée sur l'isolation de préchambre (60) ou insérée dans l'isolation de préchambre (60).
  9. Arrangement d'aimant selon l'une des revendications 7 ou 8, caractérisé en ce qu'un marquage (76a, 76b) est disposé sur la tôle de préchambre (70) et/ou sur une portion de surface libre de l'isolation de préchambre (60), lequel désigne le pôle (N, S) associé de l'au moins un aimant permanent (80).
  10. Arrangement d'aimant selon l'une des revendications 7 ou 8, caractérisé en ce que deux faces latérales (62) de l'isolation de préchambre (60) auxquelles sont respectivement associées à l'un des deux pôles (N, S) de l'au moins un aimant permanent (80) présentent des colorations différentes, notamment obtenues en teintant le matériau de l'isolation de préchambre (60).
  11. Arrangement d'aimant selon l'une des revendications 7 à 10, caractérisé en ce que la tôle de préchambre (70) et l'isolation de préchambre (60) sont maintenues dans une unité de montage (E) du commutateur à basse tension.
  12. Arrangement d'aimant selon la revendication 11, caractérisé en ce que la tôle de préchambre (70) et l'isolation de préchambre (60) sont insérées dans une unité de montage (E).
  13. Commutateur à basse tension comprenant un arrangement d'aimant selon l'une des revendications 1 à 12.
  14. Commutateur selon la revendication 13, avec lequel la tôle de préchambre (70) est fixée sur une isolation de préchambre (60) qui isole électriquement l'arc électrique de commutation par rapport à la tôle (70) et avec lequel la tôle de préchambre (70) et l'isolation de préchambre (60) sont une partie d'une unité de montage (E) du commutateur, caractérisé en ce que l'unité de montage (E) présente une partie de boîtier (12) pouvant être fixée au boîtier (10) du commutateur et, le cas échéant, pouvant être détachée du boîtier (10) du commutateur.
  15. Commutateur selon la revendication 14, caractérisé en ce que l'unité de montage (E) est intégrée dans le boîtier (10) du commutateur à l'aide d'un assemblage fixant la partie de boîtier (12) par complémentarité de forme ou à force, de préférence sous la forme d'un rivetage, d'un vissage ou d'un goupillage.
EP20110187846 2011-11-04 2011-11-04 Agencement d'aimant pour un commutateur basse tension Active EP2590193B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES11187846.8T ES2501666T3 (es) 2011-11-04 2011-11-04 Disposición magnética para un conmutador de baja tensión
EP20110187846 EP2590193B1 (fr) 2011-11-04 2011-11-04 Agencement d'aimant pour un commutateur basse tension
US13/669,152 US9076606B2 (en) 2011-11-04 2012-11-05 Magnet arrangement for a low-voltage circuit-breaker
CN201210435063.0A CN103093987B (zh) 2011-11-04 2012-11-05 用于低压开关的磁性组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110187846 EP2590193B1 (fr) 2011-11-04 2011-11-04 Agencement d'aimant pour un commutateur basse tension

Publications (2)

Publication Number Publication Date
EP2590193A1 EP2590193A1 (fr) 2013-05-08
EP2590193B1 true EP2590193B1 (fr) 2014-06-18

Family

ID=45463215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110187846 Active EP2590193B1 (fr) 2011-11-04 2011-11-04 Agencement d'aimant pour un commutateur basse tension

Country Status (4)

Country Link
US (1) US9076606B2 (fr)
EP (1) EP2590193B1 (fr)
CN (1) CN103093987B (fr)
ES (1) ES2501666T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105097333B (zh) * 2014-04-21 2018-01-16 西门子公司 切换装置的灭弧组件及其切换装置
US9653237B1 (en) * 2015-12-03 2017-05-16 Eaton Corporation Electrical switching apparatus and slot motor therefor
GB201820594D0 (en) * 2018-12-18 2019-01-30 Eaton Intelligent Power Ltd Contact unit for a switching device and switching device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395606A (en) * 1981-03-11 1983-07-26 Allen-Bradley Company Disconnect switch with line-side contact module
DE3347042A1 (de) * 1983-12-24 1985-07-04 Brown, Boveri & Cie Ag, 6800 Mannheim Lichtbogenloeschanordnunng
FR2622736B1 (fr) * 1987-10-28 1995-04-14 Merlin Gerin Disjoncteur basse tension, a courant continu, et a joues de guidage de l'arc
US4962406A (en) * 1989-12-26 1990-10-09 Westinghouse Electric Corp. Compact DC/AC circuit breaker with common arc extinguishing capability
EP1548773B1 (fr) 2003-12-22 2008-03-26 ABB Schweiz AG Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure
US7839243B1 (en) * 2007-04-11 2010-11-23 Siemens Industry, Inc. Devices, systems, and methods for dissipating energy from an arc
DE102007025537A1 (de) 2007-05-31 2008-12-04 Abb Ag Elektrisches Installationsschaltgerät mit einer Lichtbogenblaseinrichtung
IT1391125B1 (it) * 2008-10-15 2011-11-18 Abb Spa Interruttore di bassa tensione.
FR2938969A1 (fr) 2008-11-21 2010-05-28 Schneider Electric Ind Sas Dispositif de coupure pour couper un courant continu bidirectionnel et installation a cellules photovoltaiques equipee d'un tel dispositif
US8735758B2 (en) * 2009-10-05 2014-05-27 Siemens Industry, Inc. Circuit breaker having dual arc chamber

Also Published As

Publication number Publication date
ES2501666T3 (es) 2014-10-02
US20130112656A1 (en) 2013-05-09
EP2590193A1 (fr) 2013-05-08
CN103093987B (zh) 2016-08-03
CN103093987A (zh) 2013-05-08
US9076606B2 (en) 2015-07-07

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