EP1399940B1 - Pole de disjoncteur miniature - Google Patents

Pole de disjoncteur miniature Download PDF

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Publication number
EP1399940B1
EP1399940B1 EP02747434A EP02747434A EP1399940B1 EP 1399940 B1 EP1399940 B1 EP 1399940B1 EP 02747434 A EP02747434 A EP 02747434A EP 02747434 A EP02747434 A EP 02747434A EP 1399940 B1 EP1399940 B1 EP 1399940B1
Authority
EP
European Patent Office
Prior art keywords
contacts
circuit breaker
moving
contact
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02747434A
Other languages
German (de)
English (en)
Other versions
EP1399940A1 (fr
Inventor
Alberto Antoniazzi
Franco Rinco
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 Service SRL
Original Assignee
ABB Service SRL
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Filing date
Publication date
Application filed by ABB Service SRL filed Critical ABB Service SRL
Publication of EP1399940A1 publication Critical patent/EP1399940A1/fr
Application granted granted Critical
Publication of EP1399940B1 publication Critical patent/EP1399940B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • 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
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Definitions

  • the present invention relates to a miniature circuit breaker pole for low-voltage applications, i.e., with operating voltages up to 1000 volts.
  • circuit breakers are dimensionally characterized in that their width is equal to, or a multiple of, the width of a standard module, depending on the number of poles used, as prescribed by relevant international standards, and are normally used by mounting them on appropriate supporting elements, for example DIN rails, which are in turn usually placed within appropriately provided electrical cabinets.
  • modular circuit breakers be they of the residual-current or magnetothermal type, is the ability to ensure adequate levels of protection against any faults or malfunctions occurring in the system with rapid tripping times while occupying the smallest possible space.
  • the space they occupy is as small as possible, so that for an equal space available it is possible to increase the number of devices that can be used or to reduce the space required for an equal number of devices.
  • the aim of the present invention is to provide a low-voltage miniature circuit breaker pole that allows to obviate the drawbacks of the known art and which in particular, with respect to known modular circuit breakers having a standard width, allows to increase considerably its performance, more specifically its breaking capacity in short-circuit conditions, without thereby requiring a corresponding increase in dimensions and particularly in width.
  • This aim and other objects that will become apparent hereinafter are achieved by a single-pole miniature circuit breaker, comprising:
  • circuit breaker according to the invention is capable of providing a functional performance that is distinctly improved with respect to the known art while providing optimized space requirements.
  • the miniature circuit breaker pole comprises a casing 1, which has: a front wall 2, from which an actuation lever 3 protrudes, said lever being coupled to the casing so that it can rotate about an appropriately provided pivot; a rear wall 4, which is conveniently shaped so as to facilitate coupling with a supporting guide, not shown, for example a DIN rail; two side walls 5 and 6, which are substantially mutually parallel and whose distance, equal to a base module M, defines the width of the circuit breaker; an upper wall 7 and a lower wall 8.
  • terminals 9 are two corresponding terminals 9, only one of which is partially visible in Figure 1, with corresponding clamping terminals, for connection in input and in output from the circuit breaker with the phase of a low-voltage electric circuit that said pole is meant to protect; the terminals 9 can be provided at the upper and lower walls, as shown in Figure 1, or can be arranged differently.
  • said base module taking into account normal manufacturing tolerances, is equal to 17,5 ( 0 + 0.5 ) mm, as prescribed by the DIN 43880 standard.
  • the functional components of the circuit breaker are arranged inside the casing 1, in the manner that will become apparent from the description that follows, and comprise: fixed and moving contact means, which can be inutually separated in order to interrupt the flow of current in the phase of the circuit; a kinematic mechanism, per se known, generally designated by the reference numeral 10, which is operatively connected to the actuation lever 3 and is suitable to move the moving contact means; electric arc quenching means; a device for protection against any short-circuit faults; and a device for protection against overloads.
  • the device for protection against short-circuit faults is a device of the electromagnetic type and comprises a coil 11, which is wound around a supporting element 12, and a striker 13, which is operatively associated with the coil 11 and is shown only partially in Figures 2 and 3; said striker 13 is arranged inside the winding of the coil 11 and can move along the direction connecting the upper wall 7 and the lower wall 8, so that in short-circuit conditions it interacts operatively with the kinematic mechanism 10, actuating it and ultimately causing the separation of the contacts and the interruption of the flow of current in the phase to be protected.
  • the device for protection against overloads comprises a heat-sensitive element 14, for example a bimetallic lamina, which is electrically connected to the connection terminal 9; said element 14 can interact operatively with the kinematic mechanism 10, so as to cause it to trip when an overload exceeding a preset limit occurs and thus also cause separation of the contacts and interruption of the flow of current in the phase.
  • a heat-sensitive element 14 for example a bimetallic lamina, which is electrically connected to the connection terminal 9; said element 14 can interact operatively with the kinematic mechanism 10, so as to cause it to trip when an overload exceeding a preset limit occurs and thus also cause separation of the contacts and interruption of the flow of current in the phase.
  • the fixed and moving contact means comprise a first pair of contacts, provided with a first fixed contact 15 and a first moving contact 16, which is electrically connected to the element 14 by means of a suitable conductor, typically a flexible braid 19, and a second pair of contacts, which provides a second fixed contact 17 and a second moving contact 18, the two pairs of contacts 15-16 and 17-18 being electrically connected in series to each other in the manners described in detail hereinafter.
  • the first fixed contact 15 and the second fixed contact 17 are arranged side by side at a suitable distance along the line that connects the side walls 5 and 6, i.e., along the shortest dimension of the circuit breaker, i.e., the width M; furthermore, the contacts 15 and 17 are arranged so that the surfaces that they offer to electrical coupling to the corresponding moving contacts face the wall 8 and therefore lie transversely to the front wall and rear wall of the casing, as well as to the side walls.
  • first moving contact 16 and the second moving contact 18 are advantageously provided by means of two contoured conducting bodies, which are structurally mutually separated and are mounted so as to be spaced on a contact holder 29 of the kinematic mechanism 10, at a distance that corresponds to the distance between the fixed contacts 15 and 17; said moving contact holder 29 is arranged inside the casing and rotates about an axis 20 that is directed along a line that connects the side walls 5 and 6 and is therefore substantially parallel to the rotation shaft 21 of the actuation lever 3.
  • the electric arc quenching means comprise two arc quenching chambers 22 and 23, each of which is operatively associated with a pair of contacts, designated by the reference numerals 15-16 and 17-18 respectively; said arc quenching chambers 22 and 23 are arranged mutually side by side proximate to the rear wall 4, so that each one is adjacent to the corresponding side wall 5 and 6, and are separated by a partition 24 made of plastic material that is interposed between them.
  • two corresponding arc guide conductors designated by the reference numerals 25-26 and 27-28 respectively, are furthermore associated with each chamber 22 and 23.
  • a first arc guide conductor 25 is connected electrically to the connection terminal 9 and is shaped so that it has a free end arranged at the base of the chamber 22, while a second arc guide conductor 26, on which the first fixed contact 15 is fixed, is connected electrically to the coil 11 at one end and has another end that is free and arranged at the upper part of the chamber 22.
  • the two arc guide conductors associated with the chamber 23 are constituted by a third conductor 27, which is electrically connected by means of a second flexible braid 19 to the second moving contact 18 and is configured so as to have a free end arranged at the base of the chamber 23, and by a fourth conductor 28, on which the second fixed contact 17 is fixed, said second fixed contact being electrically connected to the second terminal 9 and having a portion arranged at the upper part of the chamber 23.
  • the circuit breaker according to the invention uses a supplemental conductor 30, which has a first end connected to the coil 11 and a second end connected to the arc guide conductor 27 associated with the chamber 23; in particular, in the embodiment shown in Figures 2 and 3, the supplemental conductor has a first portion 31, in which one end is free and connected to the coil and lies at right angles to the axis of said coil, and a second portion, which is contiguous to the first portion 31 and perpendicular thereto, lies along the line that connects the walls 7 and 8, and is arranged so that a portion thereof is laterally adjacent to the coil 11, its free end being connected to the conductor 27.
  • the first fixed contact 15 and the second moving contact 18 are electrically series-connected, with the interposition of the coil 11, the supplemental conductor 30, the arc guiding conductor 27, and the second flexible braid 19, providing the circuit of Figure 5.
  • the two pairs of contacts 15-16 and 17-18 are electrically series-connected and are arranged close to each other and so that in normal operating conditions they are crossed by currents that have the same direction.
  • the circuit breaker according to the invention is capable of interrupting the flow of current in the phase in two regions that are arranged electrically in series, with a breaking capacity which, indeed by virtue of the synergistic effect mentioned above, is surprisingly high, in some cases even higher than twice the value of the breaking capacity of a single pair of contacts that is part of the pole according to the present invention.
  • circuit breaker according to the invention fully achieves the intended aim, since by virtue of the arrangement of the various components and of the configuration of their mutual electrical connections, it allows to obtain a functional performance that is improved considerably with respect to known circuit breakers of equal dimensions and particularly of equal width. Furthermore, in addition to the above cited advantages, the possibility to have two moving contacts that are structurally mutually separated allows to have protection trippings, albeit limited ones, even when one of the moving contacts has welded itself to the corresponding fixed contact.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)

Claims (8)

  1. Disjoncteur unipolaire miniature comprenant :
    - un boîtier (1) sur lequel se trouvent deux bornes (9) pour la connexion, en entrée et en sortie du disjoncteur, à une phase de circuit électrique basse tension, ledit boîtier (1) ayant une paroi avant (2) d'où un levier d'activation (3) fait saillie, une paroi arrière (4) pour effectuer un couplage à un élément de support, deux parois latérales (5, 6) qui sont sensiblement parallèles entre elles et dont la distance est égale à la largeur d'un module de base M, une paroi supérieure (7) et une paroi inférieure (8).
    A l'intérieur du boîtier (1) sont disposés :
    - des moyens de contact fixes (15, 17) et mobiles (16, 18) qui peuvent être mutuellement séparés de manière à interrompre le flux de courant dans ladite phase ;
    - un mécanisme cinématique (10) qui est connecté de manière opérationnelle au dit levier d'activation (3) et qui est approprié pour déplacer ledit moyen de contact mobile ;
    - un moyen d'amortissement d'arc électrique (22, 23) ;
    - un dispositif de protection contre les courts-circuits, qui comprend une bobine (11) et un percuteur mobile (13) approprié pour interagir de manière opérationnelle avec ledit mécanisme cinématique (10) ;
    - un dispositif de protection contre les surcharges, lequel comprend un élément thermosensible qui est approprié pour interagir de manière opérationnelle avec le mécanisme cinématique (10) ;
    - lesdits moyens de contact fixes (15, 17) et mobiles (16, 18) comprennent une première paire de contacts (15, 16), ayant un premier contact fixe (15) et un premier contact mobile (16), et une seconde paire de contacts (17, 18), ayant un second contact fixe (17) et un second contact mobile (18), une première chambre d'amortissement d'arc (22) et une seconde chambre d'amortissement d'arc (23) étant respectivement associées avec lesdites première (15, 16) et seconde (17, 18) paires de contacts, lesdites première (15, 16) et seconde (17, 18) paires de contacts étant électriquement connectées en série les unes aux autres et caractérisées en ce que lesdites première et seconde paires de contacts sont, lors de leur utilisation, traversées par des courants qui ont la même direction.
  2. Disjoncteur selon la revendication 1, caractérisé en ce que ledit module de base M a une dimension égale à approximativement 17,5 mm.
  3. Disjoncteur selon la revendication 1 ou la revendication 2, caractérisé en ce que ledit premier contact mobile et ledit second contact mobile sont constitués au moyen de deux corps conducteurs profilés qui sont structurellement mutuellement séparés.
  4. Disjoncteur selon la revendication 3, caractérisé en ce que ledit premier et ledit second contacts mobiles sont montés de manière à être mutuellement espacés sur un support de contact du mécanisme cinématique, ledit support de contact étant arrangé dans le boîtier de manière à ce qu'il tourne autour d'un axe se trouvant le long d'une ligne qui connecte lesdites parois latérales.
  5. Disjoncteur selon une ou plusieurs des revendications précédentes, caractérisé en ce que deux conducteurs guides d'arc correspondants sont associés avec ladite première et ladite seconde chambres d'amortissement d'arc , un premier desdits conducteurs guides d'arc étant électriquement connecté à une première borne de connexion et ayant une extrémité libre arrangée à une extrémité de la première chambre, un second desdits conducteurs guides d'arc, sur lequel ledit premier contact fixe est fixé, ayant une première extrémité qui est électriquement connectée à ladite bobine et une seconde extrémité qui est arrangée à une seconde extrémité de la première chambre, un troisième conducteur guide d'arc étant électriquement connecté, au moyen d'un conducteur de connexion, au second contact mobile et ayant une extrémité libre qui est arrangée à une extrémité de la seconde chambre, un quatrième conducteur guide, sur lequel le second contact fixe est fixé, étant électriquement connecté à une seconde borne de connexion et ayant une portion arrangée au niveau d'une seconde extrémité de la seconde chambre.
  6. Disjoncteur selon la revendication 5, caractérisé en ce que ladite première paire et ladite seconde paire de contacts sont arrangées à proximité l'une de l'autre, de sorte que lorsque les contacts respectifs se séparent, deux arcs électriques correspondants se forment, lesquels sont arrangés électriquement en série, lesdits arcs induisant, sur lesdits conducteurs guides d'arc, des champs magnétiques correspondants dont les lignes de flux ont la même direction et se chevauchent au moins partiellement.
  7. Disjoncteur selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comprend un conducteur supplémentaire, lequel possède une première portion se trouvant le long de la ligne qui connecte lesdites parois supérieure et inférieure et qui est partiellement latéralement adjacente à la cellule, une extrémité étant connectée au troisième conducteur guide d'arc, et une seconde portion, laquelle est contiguë à la première et perpendiculaire à celle-ci et qui dispose d'une extrémité qui est connectée à ladite bobine.
  8. Disjoncteur selon la revendication 7, caractérisé en ce que le premier contact fixe et le second contact mobile sont électriquement connectés en série, ladite bobine, ledit conducteur supplémentaire, ledit troisième conducteur guide d'arc et ledit conducteur assurant la connexion entre ledit troisième conducteur guide d'arc et ledit second contact mobile étant interposés entre ledit premier contact fixe et ledit second contact mobile.
EP02747434A 2001-06-22 2002-06-21 Pole de disjoncteur miniature Expired - Lifetime EP1399940B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI20011326 2001-06-22
IT2001MI001326 IT1325891B (it) 2001-06-22 2001-06-22 Polo interruttore miniaturizzato
PCT/EP2002/007041 WO2003001549A1 (fr) 2001-06-22 2002-06-21 Pôle de disjoncteur miniature

Publications (2)

Publication Number Publication Date
EP1399940A1 EP1399940A1 (fr) 2004-03-24
EP1399940B1 true EP1399940B1 (fr) 2006-02-08

Family

ID=11447922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02747434A Expired - Lifetime EP1399940B1 (fr) 2001-06-22 2002-06-21 Pole de disjoncteur miniature

Country Status (6)

Country Link
EP (1) EP1399940B1 (fr)
CN (1) CN1320582C (fr)
AT (1) ATE317589T1 (fr)
DE (1) DE60209126T2 (fr)
IT (1) IT1325891B (fr)
WO (1) WO2003001549A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007511293A (ja) * 2003-11-14 2007-05-10 ティッシュー エンジニアリング リフラクション， インコーポレイティッド 上皮処置の方法および上皮を処置するためのデバイス
DE102011078524A1 (de) * 2011-07-01 2013-01-03 Siemens Aktiengesellschaft Doppeltunterbrechendes Schutzschaltgerät
DE102013200929A1 (de) 2013-01-22 2014-07-24 Siemens Aktiengesellschaft Schaltmechanik für ein elektromechanisches Schaltgerät
DE102015207204A1 (de) 2015-04-21 2016-10-27 Siemens Aktiengesellschaft Kurzschluss-Auslösevorrichtung, Herstellungsverfahren für eine Magnetspule und elektromechanisches Schutzschaltgerät
DE102015217704A1 (de) 2015-09-16 2017-03-16 Siemens Aktiengesellschaft Lichtbogen-Löschvorrichtung und Schutzschaltgerät
DE102015217694A1 (de) 2015-09-16 2017-03-16 Siemens Aktiengesellschaft Lichtbogen-Löschvorrichtung und Schutzschaltgerät
DE102015226004B4 (de) 2015-12-18 2021-11-18 Siemens Aktiengesellschaft Isolierstoffgehäuse und elektromechanisches Schutzschaltgerät
DE202017000141U1 (de) 2017-01-11 2017-02-06 Siemens Aktiengesellschaft Elektromechanisches Schutzschaltgerät und Verbindungsmittel
CN109427506B (zh) * 2017-08-25 2020-11-20 佛山市顺德区美的电热电器制造有限公司 压力开关及电压力锅
US10236145B1 (en) * 2017-11-22 2019-03-19 Carling Technologies, Inc. High voltage DC circuit breaker with double break contacts
DE102018109403A1 (de) 2018-04-19 2019-10-24 Tdk Electronics Ag Schaltvorrichtung
DE102018210925B4 (de) 2018-07-03 2022-06-09 Siemens Aktiengesellschaft Elektromechanisches Niederspannungs-Schutzschaltgerät
CN112490094A (zh) * 2020-12-22 2021-03-12 西安理工大学 一种限流式空气直流断路器灭弧装置及其灭弧方法
CN115547766A (zh) * 2021-06-29 2022-12-30 施耐德电器工业公司 微型断路器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH543174A (de) * 1971-09-30 1973-10-15 Carl Maier & Cie Elek Sche Sch Leitungsschutzschalter
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
FR2703821B1 (fr) * 1993-04-07 1995-05-12 Merlin Gerin Disjoncteur électrique à répulsion électrodynamique des contacts et à chambres de coupure double.
DE19517634C2 (de) * 1995-05-13 2002-01-31 Abb Patent Gmbh Elektrisches Installationsschaltgerät
EP1220260A1 (fr) * 2000-12-27 2002-07-03 ABB Schweiz AG Disjoncteur à système de contacts à coupure double

Also Published As

Publication number Publication date
ATE317589T1 (de) 2006-02-15
WO2003001549A1 (fr) 2003-01-03
EP1399940A1 (fr) 2004-03-24
ITMI20011326A1 (it) 2002-12-22
CN1320582C (zh) 2007-06-06
DE60209126D1 (de) 2006-04-20
DE60209126T2 (de) 2006-10-26
ITMI20011326A0 (it) 2001-06-22
IT1325891B (it) 2004-12-30
CN1465084A (zh) 2003-12-31

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