EP0442409A1 - Gleichstromschutz für hohe Leistung - Google Patents

Gleichstromschutz für hohe Leistung Download PDF

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Publication number
EP0442409A1
EP0442409A1 EP91101860A EP91101860A EP0442409A1 EP 0442409 A1 EP0442409 A1 EP 0442409A1 EP 91101860 A EP91101860 A EP 91101860A EP 91101860 A EP91101860 A EP 91101860A EP 0442409 A1 EP0442409 A1 EP 0442409A1
Authority
EP
European Patent Office
Prior art keywords
contactor
contact
circuit
spring
pusher
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.)
Granted
Application number
EP91101860A
Other languages
English (en)
French (fr)
Other versions
EP0442409B1 (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 direct current contactor for high powers, comprising a main conduction circuit with fixed contacts and movable contact, and a cut-off circuit with fixed contact and rotary lever around an axis and provided at its end with a contact, with control member provided with a pusher capable of pushing a movable core towards the rotary lever by means of at least one spring.
  • 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 must often, 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 sustained 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 liquid more quickly. 'arc, and is more easily adaptable to different circuits and to fixtures in different positions.
  • 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 shows 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 breaking 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 comprises 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 being 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 arranged 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 bulk 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 extinguishing 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. contactor.
  • This box which incorporates 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.
  • connection 1 is fixed by pins at 28 and 30, and connection 2 by pins at 31 and 33.
  • 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 cut-off 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 disposed under the cut-off lever 6 relaxes, while keeping this lever stationary and therefore the cut-off circuit closed. However, the conduction circuit opens. The current is then diverted in its entirety from the conduction circuit to the breaking circuit.
  • the movable core 20A and the cut-off lever 6 end their downward stroke.
  • the arc extends between the contacts 7, 7A.
  • the arc is blown in the arc quenching chimney 12 between the horns 13, 14 towards the plates 15 where it disappears .
  • the coil 11, made up of numerous coils of fine wire, does not heat up when the contactor is closed, since it then only passes about 1% of the total current in the breaking circuit.
  • the closure device 16A channels the flow of outlet gases and stabilizes the arc in the metal plates 15 and avoids the manifestations of arcing 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 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.
  • control member is an electromagnet and the pusher is constituted by the movable armature of the electromagnet.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Contacts (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Keying Circuit Devices (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)
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 true EP0442409A1 (de) 1991-08-21
EP0442409B1 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)

Cited By (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.
CN109065411A (zh) * 2018-08-28 2018-12-21 马可文 一种异步电动机的保护方法
CN109065412A (zh) * 2018-08-28 2018-12-21 马可文 一种高压断路保护器

Citations (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
FR60867E (fr) * 1950-02-10 1955-02-01 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
CH418435A (de) * 1964-03-26 1966-08-15 Stotz Kontakt Gmbh Schaltgerät, insbes. Luftschütz für hohe Einschaltstromspitzen
EP0219570A1 (de) * 1985-10-24 1987-04-29 Square D Company (Deutschland) Gmbh Schaltgerät
EP0222058A1 (de) * 1985-11-05 1987-05-20 Bruno Martinetti Universalschalter mit integrierten Kontaktstücken

Patent Citations (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
FR60867E (fr) * 1950-02-10 1955-02-01 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
CH418435A (de) * 1964-03-26 1966-08-15 Stotz Kontakt Gmbh Schaltgerät, insbes. Luftschütz für hohe Einschaltstromspitzen
EP0219570A1 (de) * 1985-10-24 1987-04-29 Square D Company (Deutschland) Gmbh Schaltgerät
EP0222058A1 (de) * 1985-11-05 1987-05-20 Bruno Martinetti Universalschalter mit integrierten Kontaktstücken

Cited By (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.
CN109065411A (zh) * 2018-08-28 2018-12-21 马可文 一种异步电动机的保护方法
CN109065412A (zh) * 2018-08-28 2018-12-21 马可文 一种高压断路保护器

Also Published As

Publication number Publication date
ATE116763T1 (de) 1995-01-15
DE69106401T2 (de) 1995-05-04
FR2658659A1 (fr) 1991-08-23
FR2658659B1 (fr) 1996-07-19
DE69106401D1 (de) 1995-02-16
PT96793B (pt) 1998-08-31
EP0442409B1 (de) 1995-01-04
HU910491D0 (en) 1991-08-28
ES2068406T3 (es) 1995-04-16
PT96793A (pt) 1993-01-29
HUT56657A (en) 1991-09-30
HU217393B (hu) 2000-01-28

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