EP3709323B1 - Elektrisches gerät zur stromverbindung oder -unterbrechung in einem elektrischen schaltkreis - Google Patents

Elektrisches gerät zur stromverbindung oder -unterbrechung in einem elektrischen schaltkreis Download PDF

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Publication number
EP3709323B1
EP3709323B1 EP20157565.1A EP20157565A EP3709323B1 EP 3709323 B1 EP3709323 B1 EP 3709323B1 EP 20157565 A EP20157565 A EP 20157565A EP 3709323 B1 EP3709323 B1 EP 3709323B1
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EP
European Patent Office
Prior art keywords
contacts
fixed
movable
neutral
phase
Prior art date
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Active
Application number
EP20157565.1A
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English (en)
French (fr)
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EP3709323A1 (de
Inventor
Alain Brouillat
Thierry Fouarge
Pascal Escapa
Claude Burnot
Olivier BERGONZOLI
Yannick Gustin
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/002—Details of electromagnetic relays particular to three-phase electromagnetic relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • 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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor

Definitions

  • the present invention relates to an electrical device intended to establish or interrupt the current in an electrical circuit, said device comprising at least two pairs of fixed contacts, each pair comprising two fixed contacts electrically connected respectively to an upstream terminal and to a downstream terminal of the 'apparatus, and associated with each pair of fixed contacts, a bridge of two movable contacts capable of being moved between a first position in which it electrically connects these two fixed contacts, and a second position in which the flow of current between these two contacts fixed is interrupted, these movable contact bridges being mounted in a contact carrier allowing the movement of all the movable contact bridges at the same time, one of the pairs of fixed contacts and its associated movable contact bridge being on a line conveying the neutral, the other or one of the pairs of fixed contacts and its associated movable contact bridge being on one l sign conveying a phase or respectively one of the phases.
  • Such a device known as a “contactor” is known, which is an electrotechnical device intended to establish or interrupt the flow of current by means of an electrical or pneumatic control device.
  • this contactor can be unipolar, bipolar, tripolar or tetra-polar. In other words, this contactor has one to four power contacts designed to resist the appearance of an electric arc from a strong current on opening or closing.
  • a contactor In such a contactor, all the moving contacts are mounted in the same support so that they can all be moved at the same time when an order closing or opening is given to the contactor.
  • a contactor is capable of being actuated either manually or by means of a coil capable of being traversed by an electric current and of cooperating with a fixed armature integral with the fixed contacts of the contactor and a mobile armature integral with the mobile contacts of the contactor. contactor.
  • this device includes a neutral line, being for example of the tetra polar type comprising three phase lines and a neutral line
  • the neutral line is materialized in the same way as the phase line, that is to say that it comprises two fixed contacts electrically connected respectively to the two terminals, and a movable contact bridge forming two movable contacts able to cooperate respectively with the two aforementioned fixed contacts.
  • a three-phase contactor comprising a neutral line and three phase lines
  • the adjacent contact remains conducting and the neutral contact opens following placing the contact carrier across.
  • a phase-to-phase voltage is then established between the phase lines, which destroys the customer's electrical charges.
  • the present invention solves these problems and proposes an electrical device intended to establish or interrupt the current in an electrical circuit, making it possible to maintain continuity in the neutral line even in the case where an electrical phase contact remains stuck during opening. contactor.
  • the present invention relates to an electrical device of the type mentioned above, this device being characterized in that the opening distance between, on the one hand, the fixed neutral contacts and, on the other hand, the movable contacts of neutral, is less than the opening distance between the fixed contacts of the or each of the phases, and the corresponding movable contacts of the or each of the phases, respectively, so that when two respectively fixed and movable contacts of a line phase are welded when opening the contactor, the two mobile neutral contacts remain closed so that the neutral remains conductive, even in the case of a contact carrier being placed across the contact holder following the welding of these two contacts respectively fixed and mobile phase.
  • the opening distance between each fixed neutral contact and its associated moving neutral contact is between substantially 80% of the opening distance between each moving phase contact and its associated fixed phase contact and substantially 40% of this phase contact opening distance.
  • the opening distance between the neutral contacts corresponds approximately to 70% of that of the phase contacts.
  • the opening distance between the fixed and mobile phase contacts is approximately 2.5mm, while the opening distance between the fixed and mobile neutral contacts is approximately 2mm.
  • the reduction in the opening distance of the neutral contacts is obtained by an increase in the thickness of the contact pads associated with the fixed neutral contacts and / or an increase in the thickness of the associated contact pads. to the moving neutral contacts.
  • the thickness of the pads of the movable neutral contacts is between 0.9 and 1.4mm.
  • this device is a contactor having a rating of 40A, the opening distance of the moving phase contacts being 2.5mm, while the opening distance of the fixed neutral contacts is 2mm.
  • the reduction in the opening distance of the fixed and movable neutral contacts is obtained by bending or deformation of the fixed neutral contacts and / or bending or deformation of the fixed and movable neutral contacts.
  • an electrical contactor C having a rating of 40A.
  • this contactor C is housed in a housing B of substantially parallelepiped shape comprising a rear face for fixing to a mounting rail, a front face forming a nose, two side faces by which the contactor can be attached to other devices of the same type on the rail, and two respectively upper and lower faces respectively comprising a set of downstream terminals and a set of upstream terminals.
  • this device is of the tetra-polar type and accommodates four electric lines, respectively a neutral line and three phase lines.
  • Each of these electric lines is associated with an upstream terminal and a downstream terminal, intended to be electrically connected, as regards the upstream terminals, to supply means, and as regards the downstream terminals, to control devices. departure, by means of cables or a comb.
  • Each phase electric line has two fixed contacts 2,6; 3.7; 4.8 electrically connected respectively to a downstream terminal and an upstream terminal, and a bridge P ( Fig. 2 ) two movable contacts 9,10,11,12,13 intended respectively to cooperate with two fixed contacts. All the contacts have p, n contact pads in the contact areas. All the fixed contacts 1 to 8 are electrically and mechanically connected by their end situated opposite the movable contacts 9 to 13, to the connection pad of the corresponding terminal.
  • All the movable contact bridges P of the device are mounted in the same support called contact holder 14 capable of being moved by means of manual or electromagnetic type control, between the two aforementioned positions.
  • the opening distance e between, on the one hand, the fixed neutral contacts 1.5 and, on the other hand, their associated moving contacts 9.13 is less than the opening distance d between the fixed phase contacts 2,3,4,6,7,8 and their associated movable contacts 10,11,12, in such a way that when two contacts 4,12 of a phase line are welded during the opening of the contactor, the contacts neutral 1.9 and 5.13 remain closed so that the neutral remains conductive, even in the case of a crossing of the contact carrier 14 following the welding of these two contacts.
  • the opening distance e between a fixed neutral contact 1.5 and an associated mobile neutral contact 9.13 is between approximately 80% of the opening distance d between a fixed phase contact 2,3,4 , 6,7,8 and an associated mobile phase contact 10,11,12 and substantially 40% of this same distance.
  • this opening distance e between two neutral contacts will be 70% of the aforementioned distance.
  • this contactor has an opening distance of 2.5 mm on the three phase lines L1, L2 and L3 and an opening distance of 2 mm on the neutral line N.
  • this reduction in the opening distance between the fixed neutral contacts and the associated movable neutral contacts is achieved by increasing the thickness of the contact pads n of the movable neutral contacts 9,13 so to obtain the desired opening distances.
  • the contactor is in the open position, all the moving contacts 9 to 13 being open, establishing an opening distance e, d with their associated fixed contacts 1 to 8. This opening distance is smaller between the neutral contacts than 'between phase contacts.
  • the contactor is in the closed position, which corresponds to placing all the movable contacts 9 to 13 respectively in contact with their associated fixed contacts 1 to 8.
  • the contactor is in a so-called intermediate opening position in which the moving phase contacts 10,11,12 begin to open while the moving neutral contacts 9 and 13 are still closed due to the difference in distance d the aforementioned opening.
  • the figures 3 , 4 and 5 correspond to normal operation of the contactor, i.e. none of the moving contacts are welded.
  • the contactor is a contactor according to the invention, in a situation in which a moving phase contact 12 is welded to the corresponding fixed contact 4, which also leads to the contact carrier 14 being put across.
  • the contact carrier 14 being put across.
  • the movable neutral contacts remain in contact with the fixed neutral contacts 1.5, from which it follows that the neutral remains on.
  • the reduction in the opening distance e of the fixed and mobile neutral contacts 9.13 is obtained by a bending or deformation of the fixed neutral contacts 1.5 and / or a bending or deformation of the fixed and movable neutral contacts 9.13.
  • an electrical device has been produced intended to establish or interrupt the current in an electrical circuit, making it possible to maintain electrical continuity in the neutral, thanks to a contact opening distance which is smaller on the neutral than on the neutral. phases, even if an electrical phase contact remains stuck when the contactor is opened.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Relay Circuits (AREA)
  • Breakers (AREA)
  • Contacts (AREA)

Claims (8)

  1. Elektrische Vorrichtung zur Herstellung oder Unterbrechung des Stroms in einem elektrischen Schaltkreis, wobei die Vorrichtung wenigstens zwei Paare fester Kontakte (1, 5; 2, 6; 3, 7; 4, 8) aufweist, wobei jedes Paar zwei feste Kontakte aufweist, die jeweils mit einer stromaufwärtigen Klemme bzw. einer stromabwärtigen Klemme der Vorrichtung elektrisch verbunden sind, und jedem Paar fester Kontakte eine Brücke zweier beweglicher Kontakte (9, 10, 11, 12, 13) zugeordnet ist, die geeignet ist, zwischen einer ersten Position, in welcher sie diese zwei festen Kontakte elektrisch verbindet, und einer zweiten Position, in welcher der Stromfluss zwischen diesen zwei festen Kontakten unterbrochen ist, bewegt zu werden, wobei diese beweglichen Kontaktbrücken in einem Kontaktträger (14) gelagert sind, der die Bewegung aller Brücken beweglicher Kontakte gleichzeitig gestattet, wobei sich eins der Paare fester Kontakte und dessen zugehörige Brücke beweglicher Kontakte auf einer Leitung befinden, die den Neutralleiter führt, wobei sich das andere oder eins der anderen der Paare fester Kontakte und dessen zugehörige Brücke beweglicher Kontakte auf einer Leitung befinden, die eine Phase bzw. eine der Phasen führt, dadurch gekennzeichnet, dass der Öffnungsabstand (e) zwischen den festen Neutralleiterkontakten (1, 5) einerseits und den beweglichen Neutralleiterkontakten (9, 13) andererseits kleiner als der Öffnungsabstand (d) zwischen den festen Kontakten (2, 3, 4, 6, 7, 8) der oder jeder der Phasen L1, L2, L3 und den entsprechenden beweglichen Kontakten (10, 11, 12) der bzw. jeder der Phasen ist, so dass, wenn zwei Kontakte einer Phasenleitung, die fest bzw. beweglich sind (4, 12), bei der Öffnung des Schützes verschmolzen sind, die zwei beweglichen Neutralleiterkontakte (9, 13) geschlossen bleiben, damit der Neutralleiter leitend bleibt, selbst im Falle einer Querstellung des Kontaktträgers (14) nach der Verschmelzung dieser zwei Phasenkontakte, die fest bzw. beweglich sind.
  2. Elektrische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Öffnungsabstand (e) zwischen jedem festen Neutralleiterkontakt (1, 5) und dessen zugehörigen beweglichen Neutralleiterkontakt (9, 13) im Wesentlichen zwischen 80 % des Öffnungsabstands (d) zwischen jedem beweglichen Phasenkontakt (10 bis 12) und dessen zugehörigen festen Phasenkontakt (2, 3, 4, 6, 7, 8) und im Wesentlichen 40 % dieses Öffnungsabstands (d) der Phasenkontakte beträgt.
  3. Elektrische Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Öffnungsabstand (e) zwischen den Neutralleiterkontakten im Wesentlichen 70 % von jenem (d) der Phasenkontakte entspricht.
  4. Elektrische Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Öffnungsabstand (d) zwischen den festen (2, 3, 4, 6, 7, 8) und beweglichen (10 bis 12) Phasenkontakten im Wesentlichen 2,5 mm beträgt, während der Öffnungsabstand (e) zwischen den festen und beweglichen Neutralleiterkontakten (9, 13) im Wesentlichen 2 mm beträgt.
  5. Elektrische Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verringerung des Öffnungsabstands (e) der Neutralleiterkontakte (9, 13) durch eine Erhöhung der Dicke der Kontaktpads, die den festen Neutralleiterkontakten (1, 5) zugeordnet sind, und/oder eine Erhöhung der Dicke der Kontaktpads (n), die den beweglichen Neutralleiterkontakten (9, 13) zugeordnet sind, erreicht wird.
  6. Elektrische Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Dicke der Pads der beweglichen Neutralleiterkontakte (9, 13) zwischen 0,9 und 1,4 mm beträgt.
  7. Elektrische Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Schütz mit einer Größe von 40 A ist, wobei der Öffnungsabstand (d) der festen und beweglichen Phasenkontakte (10, 11, 12) 2,5 mm beträgt, während der Öffnungsabstand (e) der festen und beweglichen Neutralleiterkontakte (9, 13) 2 mm beträgt.
  8. Elektrische Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Verringerung des Öffnungsabstands (e) der festen und beweglichen Neutralleiterkontakte (9, 13) durch eine Biegung oder eine Verformung der festen Neutralleiterkontakte (1, 5) und/oder eine Biegung oder eine Verformung der beweglichen Neutralleiterkontakte (9, 13) erreicht wird.
EP20157565.1A 2019-03-14 2020-02-17 Elektrisches gerät zur stromverbindung oder -unterbrechung in einem elektrischen schaltkreis Active EP3709323B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1902611A FR3093857B1 (fr) 2019-03-14 2019-03-14 Appareil electrique destine a etablir ou interrompre le courant dans un circuit electrique.

Publications (2)

Publication Number Publication Date
EP3709323A1 EP3709323A1 (de) 2020-09-16
EP3709323B1 true EP3709323B1 (de) 2021-05-19

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EP20157565.1A Active EP3709323B1 (de) 2019-03-14 2020-02-17 Elektrisches gerät zur stromverbindung oder -unterbrechung in einem elektrischen schaltkreis

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EP (1) EP3709323B1 (de)
CN (1) CN111696795B (de)
ES (1) ES2874754T3 (de)
FR (1) FR3093857B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4099355B1 (de) * 2021-06-01 2025-04-30 ABB Schweiz AG Elektrischer schalter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644634A1 (en) * 1989-03-07 1990-09-21 Matsushita Electric Works Ltd Electromagnetic contactor
FR2838556B1 (fr) * 2002-04-10 2004-09-10 Schneider Electric Ind Sa Appareil electrique interrupteur
US6747532B1 (en) * 2002-12-23 2004-06-08 General Electric Company Method, system and apparatus for employing neutral poles in multipole circuit breakers
EP2226820B1 (de) * 2009-03-05 2016-01-27 Rockwell Automation Technologies, Inc. Schaltphasenverschiebung zur Schützoptimierung
KR101078974B1 (ko) * 2010-01-13 2011-11-01 엘에스산전 주식회사 4극 회로차단기의 동력전달장치
CN201732750U (zh) * 2010-07-28 2011-02-02 常熟开关制造有限公司(原常熟开关厂） 旋转式双断点四极塑壳断路器
FR2963702B1 (fr) * 2010-08-05 2012-08-03 Schneider Electric Ind Sas Detection de soudure dans un appareil de commutation electrique
EP2624274B1 (de) * 2012-02-03 2014-12-31 ABB S.p.A. Hybridstrom-Schutzschalter
FR3053154B1 (fr) * 2016-06-24 2019-08-09 Hager-Electro Sas Appareil electrique de protection de ligne

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Publication number Publication date
FR3093857A1 (fr) 2020-09-18
FR3093857B1 (fr) 2021-02-19
ES2874754T3 (es) 2021-11-05
CN111696795B (zh) 2024-10-25
EP3709323A1 (de) 2020-09-16
CN111696795A (zh) 2020-09-22

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