EP0442409B1 - Gleichstromschutz für hohe Leistung - Google Patents

Gleichstromschutz für hohe Leistung Download PDF

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Publication number
EP0442409B1
EP0442409B1 EP91101860A EP91101860A EP0442409B1 EP 0442409 B1 EP0442409 B1 EP 0442409B1 EP 91101860 A EP91101860 A EP 91101860A EP 91101860 A EP91101860 A EP 91101860A EP 0442409 B1 EP0442409 B1 EP 0442409B1
Authority
EP
European Patent Office
Prior art keywords
contact
contactor
contacts
mobile
interrupter
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
EP91101860A
Other languages
English (en)
French (fr)
Other versions
EP0442409A1 (de
Inventor
Jean-Pierre Vernier
René Campan
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0442409A1 publication Critical patent/EP0442409A1/de
Application granted granted Critical
Publication of EP0442409B1 publication Critical patent/EP0442409B1/de
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
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic

Definitions

  • the present invention relates to a DC contactor for high powers according to the preamble of claim 1.
  • Such contactors constitute safety devices with electropneumatic or electromagnetic control arranged in electrical power blocks, or in rail traction in engine or car trunks. They must establish, maintain and interrupt the continuity of electrical networks with direct current of voltage in general 750 or 1500 volts, supplied at intensities between 0 and 1200 nominal amps, with peaks likely to temporarily reach 5000 amps. They often need, especially for electric traction, operate under very difficult conditions: fluctuations in the ambient temperature, polluted atmosphere, vibrations, electrical overload, and ensure prolonged service even in very heavy use.
  • the object of the present invention is to provide a direct current contactor for high powers with improved durability, more compact, lighter, the cut-off circuit of which operates only for relatively short periods of time, and possibly which ensures the blowing of the air more quickly. 'arc, and is more easily adaptable to different circuits and to fixtures in different positions.
  • the invention therefore relates to a DC contactor for high powers according to claim 1.
  • FIG. 1A represents the contactor in the open position of the cut-off and conduction circuits, with the exception of the arc extinguishing chimney.
  • Figure 1B shows the arc extinguishing chimney.
  • Figure 2 shows on a larger scale the cartridge ensuring the contact pressure.
  • FIG. 3 represents the contactor in the closed position of the cut-off circuit, the conduction circuit remaining open (without the arc extinguishing chimney).
  • FIG. 4 shows it in the closed position of the cut-off and conduction circuits (also without the arc extinguishing chimney).
  • FIG. 5 shows on a larger scale the device for fixing the chimney to the contactor.
  • Figure 6 shows on a larger scale the plastic housing comprising the attachment of the auxiliary control contacts and the cam slide actuating them.
  • Figure 7 shows on a larger scale the fixing system by pins of the connections in two different positions.
  • control member being constituted by a jack and the pusher being constituted by the piston of the jack.
  • the main conduction circuit comprises two current input and output connections 1, 2 made of copper provided with silver pellets 4, and a movable contact made of copper 3 also provided with silver pellets 5, intended to be driven in the closed position by a movable core to which it is integral, this movable core being actuated by the rod 17 of a jack 16.
  • the cut-off circuit includes a movable insulating lever 6 provided with a cut-off contact 7 made of copper-tungsten at one end and rotating around an axis 8 at the other end under the effect of the pressure of the movable core.
  • This contact is electrically connected to connection 2 by means of a copper plate 9A passing through the lever and connected by a braid 10 to connection 2.
  • a blowing coil 11 comprising numerous turns of fine enameled wire, connected to the main circuit by connection 1, ends with a fixed breaking contact 7A, also made of copper-tungsten.
  • the contact pressure generated by the rod 17 of the jack 16 is exerted on the spring 18 housed in the cage 19. It is transmitted by the latter to the bottom 20 of a movable core 20A, surrounded by a return spring 9.
  • the bottom 20 supports in a bowl the end of a spring 21, the other end of which bears on the plate 22 disposed below the insulating movable lever 6.
  • the movable contact 3 is integral with the movable core 20A but has a small angle of rotation around the axis of rotation 36 (see Figure 7) attached to the end of the movable core.
  • the contact pressure is thus ensured independently of the air pressure of the pneumatic circuit of the jack, in a reduced size and by limiting to the minimum the connection between the pneumatic control system and the internal mechanical members of the contactor.
  • the blowing chimney 12 (FIG. 1B) is removably fixed to the body of the contactor by a retractable finger 23 pushed by a spring 24 on a lug 26 (FIG. 5).
  • This chimney comprises symmetrical horns 13, 14 flaring outwards.
  • the arc extinction zone is constituted by a series of metal plates 15, arranged in a fan along a determined radius, and spaced by a precise interval and increasing towards the outside. They lead to a closure device 16 formed by insulating plates perforated with multiple holes.
  • a molded plastic case 25 (FIG. 6) has six auxiliary contacts 25A fixed by Rp bolts 27A and a cam slide 27 sliding inside and actuating these auxiliary contacts, the role of which is to control the closing or opening state of the contactor.
  • This box which integrates all the low voltage control functions, is fixed by bolts 27B on the contactor body, but can be quickly detached from it to be replaced if necessary by another.
  • the contactor connections can take two different positions, shown respectively in FIG. 7 in 1 and 2 in solid lines, or 1A and 2A in dashed lines, depending on the horizontal or vertical position in which the contactor must be placed.
  • the connection 1 In the position shown in solid lines, the connection 1 is fixed by pins at 28 and 30, and the connection 2 by pins at 31 and 33.
  • the connection 1A In the position shown in broken lines, the connection 1A is fixed by pins at 28 and 34, and connection 2 by pins at 33 and 35.
  • the cutting lever 6 in support no longer moves, but the movable core 20A can continue its ascent, then compressing the spring 21 located under the lever, and thus providing the contact pressure necessary for the good conduction of the current in the breaking circuit.
  • the movable core continuing to climb, pushes up the movable contact 3 which closes the conduction contacts 4 and 5, closing the conduction circuit.
  • the current flowing until then entirely in the breaking circuit is transferred almost entirely in the conduction circuit much less resistive.
  • the movable core no longer moves.
  • the piston rod performs an additional stroke of approximately 2 mm before reaching the stop in the jack, by pushing in the pre-stressed spring 18 placed in the cage 19, which will provide the contact pressure necessary for good conduction. of current in the main circuit passing through the contacts 4, 5. The contactor is then closed.
  • the spring 21 placed under the cut-off lever 6 relaxes, while keeping this lever stationary and therefore the cut-off circuit closed.
  • the conduction circuit opens. The current is then diverted in its entirety from the conduction circuit to the breaking circuit.
  • the magnetic circuit is thus magnetized in advance, and creates a large field. As soon as the arc appears, it is therefore blown very quickly and very vigorously towards the interior of the chimney and the plates 15. It easily enters the range of plates and splits into multiple small arcs. The arc voltage then increases to reach a value greater than the mains recovery voltage, and the arc is extinguished.
  • the shutter device 16A channels the flow of outlet gases and stabilizes the arc in the metal plates 15 and avoids the appearance of arcs outside.
  • the high efficiency of the fan-shaped plate system, with increasing spacing outwards, makes it possible to reduce the dimensions of the chimney compared to the dimensions adopted so far.
  • the above arrangement of the conduction contacts and of the breaking contacts, as well as of the lever, of the movable core and of the springs makes it possible to transfer the current from one circuit to the other during the transient phases of closing and opening, by specializing in the types of contact and making the most of their advantages.
  • the silver conductive contacts are not damaged by electric arcs which only appear on the breaking contacts. This limits the wear of the contacts and increases their longevity.
  • the breaking contacts are made of copper-tungsten, making it possible to withstand the arc well. This limits the wear of these contacts.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Keying Circuit Devices (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Claims (10)

  1. Gleichstromschütz für hohe Leistungen, mit einem Stromführungshauptkreis, welcher Eingangs- und Ausgangsanschlüsse (1, 2) mit feststehenden Hauptkontakten (4) aufweist, die durch einen beweglichen Kontakt (3) verbunden werden können, und mit einem Trennkreis, der parallel zum Stromführungshauptkreis geschaltet werden kann und einen ersten Trennkontakt (7A) aufweist, der elektrisch mit dem einen der Anschlüsse verbunden ist und einen Hebel (6) aufweist, der mit einem zweiten Trennkontakt (7) versehen ist, welcher elektrisch mit dem anderen der beiden Anschlüsse verbunden ist, wobei dieser Hebel um eine Achse (8) schwenken kann, derart, daß der zweite Trennkontakt (7) elektrisch den ersten Trennkontakt (7A) kontaktieren kann, und einen isolierenden Abschnitt zwischen dem zweiten Trennkontakt (7) und der Achse (8) aufweist, und mit Mitteln zum Schließen und Öffnen des Stromleitungshauptkreises und des Trennkreises, dadurch gekennzeichnet, daß die Schließ- und Öffnungsmittel in Flucht angeordnet ein mit einem Stößel (17) versehenes Betätigungsglied (16), einen beweglichen Kern (20A), auf den der Stößel wirkt, eine auf dem beweglichen Kern angeordnete Feder (21), den Hebel (6) und den fest mit dem beweglichen Kern verbundenen beweglichen Kontakt (3) aufweisen, wobei die Anordnung der Mittel zum Schließen und Öffnen so getroffen ist, daß
    - beim Schließen des Schützes sich der Stößel (17) in Richtung der feststehenden Hauptkontakte (4) verschiebt und dabei auf den beweglichen Kern (20A) sowie die Feder drückt, die auf den Hebel wirkt, um ihn bis in eine feste Position zu drücken, in der Trennkreis geschlossen ist, während der mit dem beweglichen Kern verbundene bewegliche Kontakt anschließend den Stromführungshauptkreis schließt, wobei die Feder (21)zusammengedrückt wird,
    - beim Öffnen des Schützes das Zurückziehen des Stößels den beweglichen Kern aufgrund von elastischen Rückholmitteln (9) zurückweichen und die Feder (21) sich entspannen läßt sowie den Stromführungshauptkreis durch das Zurückweichen des beweglichen Kontaktes (3) öffnet, worauf sich der Trennkreis aufgrund der Bewegung des Hebels (6) durch den beweglichen Kontakt (3) im Laufe der Rückbewegung auf den Hebel (6) öffnet.
  2. Schütz nach Anspruch 1, dadurch gekennzeichnet, daß die zwischen dem beweglichen Kern (20A) und dem drehbaren Hebel (6) angeordnete Feder (21) eine ausreichende Kraft besitzt, um den Anpreßdruck des beweglichen Trennkontaktes (7) am feststehenden Kontakt (7A) sicherzustellen, daß eine vorgespannte Feder in einer Kartusche angeordnet ist, die zwischen dem Kopf des Stößels (17) und dem beweglichen Kern (20A) angeordnet ist, und daß der Hub des Stößels so bemessen ist, daß er nach dem Aufsetzen des beweglichen Stromführungskontaktes (3) auf seinen feststehenden Kontakten die vorgespannte Feder (18) zusammendrückt und dabei den Anpreßdruck der Stromführungskontakte gewährleistet.
  3. Schütz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Rückholfeder (9), die sich auf eine Schulter des beweglichen Kerns (20A) abstützt, den Stößel in Richtung einer Öffnungsbewegung der Hauptkontakte 3, 4 beim Öffnen des Schützes bewegt.
  4. Schütz nach einem der Ansprüche 1 bis 3 mit Hilfskontakten zum Kontrollieren seines Schließ- oder Öffnungszustandes und mit einem gleitenden Nockenschieber, der die Kontakte betätigt, dadurch gekennzeichnet, daß die Hilfskontakte und der Nockenschieber in einem gemeinsamen abnehmbaren Gehäuse (25) montiert sind.
  5. Schütz nach einem der Ansprüche 1 bis 4 für eine Montage in einer waagrechten oder senkrechten Position, dadurch gekennzeichnet, daß es zwei Gruppen (28, 30, 28, 34; 31, 33, 33, 35) von Organen zur Befestigung der Anschlüsse in Form von Stiften aufweist, die an die eine oder an die andere Montageposition angepaßt sind.
  6. Schütz nach einem der Ansprüche 1 bis 5, mit einem Lichtbogenblaskamin (12), dadurch gekennzeichnet, daß er eine Spule (11) zur Erzeugung des magnetischen Blasfeldes aufweist, die in Reihe im Trennkreis angeordnet ist.
  7. Schütz nach einem der Ansprüche 1 bis 6, mit einem Lichtbogenblaskamin (12), der aus einer Reihe von Metallplatten (15) gebildet ist, die zwischen Hörnern (13, 14) angeordnet sind, dadurch gekennzeichnet, daß die Metallplatten fächerförmig angeordnet sind, durch einen genauen Zwischenabstand getrennt sind, der von ihren den Trennkontakten am nächsten liegenden Ende zu ihrem am entferntesten liegenden Ende zunimmt.
  8. Schütz nach einem der Ansprüche 1 bis 7, mit einem Lichtbogenblaskamin, dadurch gekennzeichnet, daß dieser an seinem Gehäuse durch einen versenkbaren Finger (23) befestigt ist, der dem Druck einer Positionshaltefeder (24) ausgesetzt ist.
  9. Schütz nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Steuerglied ein Hubzylinder ist, wobei der Stößel durch den Kolben des Hubzylinders gebildet wird.
  10. Schütz nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Steuerglied ein Elektromagnet ist, wobei der Stößel von der beweglichen Armatur des Elektromagneten gebildet wird.
EP91101860A 1990-02-16 1991-02-11 Gleichstromschutz für hohe Leistung Expired - Lifetime EP0442409B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001894 1990-02-16
FR9001894A FR2658659B1 (fr) 1990-02-16 1990-02-16 Contacteur a courant continu pour puissances elevees.

Publications (2)

Publication Number Publication Date
EP0442409A1 EP0442409A1 (de) 1991-08-21
EP0442409B1 true EP0442409B1 (de) 1995-01-04

Family

ID=9393807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101860A Expired - Lifetime EP0442409B1 (de) 1990-02-16 1991-02-11 Gleichstromschutz für hohe Leistung

Country Status (7)

Country Link
EP (1) EP0442409B1 (de)
AT (1) ATE116763T1 (de)
DE (1) DE69106401T2 (de)
ES (1) ES2068406T3 (de)
FR (1) FR2658659B1 (de)
HU (1) HU217393B (de)
PT (1) PT96793B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701334A1 (fr) * 1993-02-05 1994-08-12 Alsthom Gec Cheminée d'extinction d'arc pour contacteur.
CN109065412B (zh) * 2018-08-28 2019-09-06 奥菲(泰州)光电传感技术有限公司 一种高压断路保护器
CN109065411B (zh) * 2018-08-28 2019-09-03 泰州镭昇光电科技有限公司 一种异步电动机的保护方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB382728A (en) * 1931-10-06 1932-11-03 Allen West & Co Ltd Improvements in or relating to electrical contactors
FR1019187A (fr) * 1950-02-10 1953-01-19 Merlin Gerin Perfectionnements apportés aux pare-étincelles des disjoncteurs, etc.
US2769062A (en) * 1952-10-21 1956-10-30 Westinghouse Electric Corp Air circuit breaker contacts
DE1894372U (de) * 1964-03-26 1964-06-11 Stotz Kontakt Gmbh Schaltgeraet, insbesondere luftschuetz fuer hohe einschaltstromspitzen.
DE3579597D1 (de) * 1985-10-24 1990-10-11 Square D Deutschland Schaltgeraet.
IT1187602B (it) * 1985-11-05 1987-12-23 Bruno Martinetti Interruttore universale a linguette contattori integrali

Also Published As

Publication number Publication date
FR2658659B1 (fr) 1996-07-19
HU910491D0 (en) 1991-08-28
HU217393B (hu) 2000-01-28
FR2658659A1 (fr) 1991-08-23
EP0442409A1 (de) 1991-08-21
PT96793B (pt) 1998-08-31
DE69106401T2 (de) 1995-05-04
HUT56657A (en) 1991-09-30
ATE116763T1 (de) 1995-01-15
DE69106401D1 (de) 1995-02-16
PT96793A (pt) 1993-01-29
ES2068406T3 (es) 1995-04-16

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