EP2555217B1 - Système de limitation de courant - Google Patents

Système de limitation de courant Download PDF

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Publication number
EP2555217B1
EP2555217B1 EP20120005541 EP12005541A EP2555217B1 EP 2555217 B1 EP2555217 B1 EP 2555217B1 EP 20120005541 EP20120005541 EP 20120005541 EP 12005541 A EP12005541 A EP 12005541A EP 2555217 B1 EP2555217 B1 EP 2555217B1
Authority
EP
European Patent Office
Prior art keywords
contact
current limiting
current
contact bridge
limiting system
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.)
Not-in-force
Application number
EP20120005541
Other languages
German (de)
English (en)
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EP2555217A1 (fr
Inventor
Roland Ritz
Joachim Becker
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 AG Germany
Original Assignee
ABB AG Germany
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Filing date
Publication date
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP2555217A1 publication Critical patent/EP2555217A1/fr
Application granted granted Critical
Publication of EP2555217B1 publication Critical patent/EP2555217B1/fr
Not-in-force 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
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/107—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops
    • H01H77/108—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops comprising magnetisable elements, e.g. flux concentrator, linear slot motor
    • 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
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H81/00—Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/30—Energy stored by deformation of elastic members by buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • 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 invention relates to a current-limiting system which is suitable for limiting a current flowing through the current-limiting system, but not interrupting it permanently, the current-limiting system comprising a contact system along a current path between a first and a second terminal contact, according to the preamble of claim 1.
  • the invention further relates to a current limiting unit with a current limiting system, as well as an arrangement of a plurality of current limiting units and an installation switching device with a current limiting system.
  • Such current limiting systems are typically used in series with circuit breakers or motor protection switches.
  • This known contact system has for this purpose a fixed contact carrier, which is connected to a first connection conductor.
  • the known contact system on a movable contact arm with an end-side movable contact piece, which is arranged in a conductive connection with a fixed contact carrier arranged immovable contact piece under normal conditions.
  • the contact arm is pivotable with a second connection conductor. The current flow extends from the second connection conductor, the contact arm, the movable contact piece, the fixed contact piece and the fixed contact carrier to the first connection conductor.
  • the current runs in opposite directions, whereby in the event of a short circuit, or if the current exceeds the predetermined amount, an electrodynamic force is generated which is able to push away the contact arm from the contact carrier.
  • the arc and the arc quenching plates limit the current in the event of a short circuit. In this way, it can be ensured that, in the event of a fault, a circuit breaker or motor protection switch connected downstream of the current limiting unit can interrupt the circuit to be protected by the circuit breaker or motor protection switch, in which the short circuit has occurred, as intended.
  • the EP 0 801 410 A2 shows an electrical installation switching device housed in a shell-type housing with a contact point, a thermal and a magnetic release and with a current limiting element in the form of a PTC resistor (positive temperature coefficient resistor), wherein the current limiting element laterally to the service switching device in a through a cup-shaped shell housing limited space is housed.
  • a PTC resistor element while a doped plastic material is used, in which there is the risk of aging effects caused by changes in electrical properties over time.
  • GB 1 576 877 A discloses a current limiting system according to the preamble of claim 1.
  • the contact system has four fixed contact pieces, which are arranged in two opposite pairs of first and second fixed contact pieces, wherein a movable contact pieces carrying, movable contact bridge is provided, the contact bridge with the movable contact pieces in a first stable switching position a first closed double contact point with forms the first two fixed contact pieces, and wherein the contact bridge in a second stable switching position forms a second closed double contact point with the two second fixed contact pieces, and wherein when the current exceeds a An Jardinschwellwert the current limiting system, the contact bridge between the first and second stable switching position out and alternates, with alternating emergence and extinction of arcs when opening and re-closing the first and second double contact points, and wherein, when the current e falls below the closing threshold of the contact system, the contact bridge remains in one of the two stable switching positions.
  • a bistable contact arrangement is thus formed.
  • the contact bridge moves back and forth between two stable switching positions, it oscillates to a certain extent.
  • the alternating arcs are formed and extinguished alternately.
  • the thermal load on the contact points is reduced.
  • the oscillation of the contact bridge prevents the contact points from closing when there is still a considerable short-circuit current above the threshold, thus preventing welding of the contact points because the contact points are repeatedly torn during short-circuit current limiting due to oscillation.
  • the current limitation by arcs avoids aging effects due to material degradation.
  • the four fixed contact pieces are electrically connected in pairs crosswise.
  • the four fixed contact pieces are electrically connected in pairs in parallel.
  • a bistable captive device for the contact bridge is present, which is coupled to the contact bridge for setting the An Jardinschwellhongs or the Sch thoroughlyschwellivess.
  • the response or closing threshold can be set application-specific.
  • the bistable function ensures that in each of the two stable switching positions of the contact bridge a restraining force is adjustable.
  • the bistable captive device can also be used to generate the necessary contact pressure force in the case of normal current flow through the current limiting system.
  • the captive device comprises a bistable snap-action disc, which is coupled via a coupling axis with the contact bridge.
  • a bistable snap-action disc acts as a contact pressure spring in its first stable position. Their spring force determines the threshold for the short-circuit current. When the threshold is exceeded, the contact bridge is moved from its first stable position against the restoring spring force of the snap disk towards the second stable position. There is a point at which the dead center of the snap disc is exceeded. This then snaps into its second stable position and tears the contact bridge. This ensures a very fast switching between the two stable switching positions of the contact bridge, and also a sticking or welding of the contact points can thus be effectively prevented.
  • the captive device comprises a compression spring which is coupled via a coupling axis with the contact bridge so that the spring force of the compression spring at an angle to the direction of the coupling axis acts on this, that the compression spring overcoming a dead center by the Coupling axis between a first and a second stable position is pivotable.
  • This embodiment of a bistable tying device fulfills the same function as described above, but preferably uses a cylinder compression spring as an alternative spring element. Cylinder springs are easier to handle than snappers for some applications and can also be manufactured more cost-effectively.
  • the contact system comprises a magnet system for driving the contact bridge from its stable position into the respective other stable position. It is the force of a suitably oriented magnetic field on an elongated electrical conductor, the contact bridge namely, used as a drive for the oscillation of the contact bridge.
  • the current limit even at smaller short-circuit currents use, as if, as known in the art, only the electrodynamic repulsion of the contact points would be used as a driving force.
  • the magnet system has a magnetic core with an air gap, wherein the contact bridge is arranged longitudinally displaceable in the air gap, and wherein the current in the current path causes a magnetization of the core, so that the magnetic field direction in the gap is perpendicular to the current direction in the contact bridge, so that the contact bridge is moved from its stable position to the other stable position when the An Jardinschwelleptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptepteptept
  • an air gap is narrow and designed high, and the contact bridge also has a narrow, high, rectangular cross-section, in a manner like a narrow band.
  • an efficient cooling of the contact bridge in the air gap by radiation and convection of the air in the narrow air gap is given as an advantage.
  • This is advantageous in that the contact bridge does not thermally deform.
  • a narrow and high structure in the form of a thin band for the contact bridge has the further advantage that the contact bridge can thus be made very easily with high mechanical stability and high moment of inertia in the direction of movement.
  • a closely matched air gap in the mechanical dimensions of the contact bridge ensures a mechanical guidance of the contact bridge in the same direction, so that they themselves transverse to its direction of movement can not bend, which could otherwise happen due to magnetic forces.
  • the double contact points are provided with arc quenching devices.
  • arc quenching devices These can be known per se arc quenching chambers, in which the arc moves in on Lichtbogenleitschienen. In doing so, it splits into a series of partial arcs, which results in an even larger countervoltage to the mains voltage driving the arc, the so-called arc voltage increases, so that the short-circuit current limitation becomes even more effective.
  • the ends of the contact bridge are split fork-shaped, each fork arm carries a movable contact piece.
  • the fork legs can be designed symmetrically or asymmetrically to the middle part of the contact bridge.
  • the contact pieces on each longitudinal side of the contact bridge have the same distance from their associated fixed contact pieces.
  • the switching distance of the contact bridge to the two opposite pairs of fixed contact pieces, ie to the two stable switching positions out be designed differently. This provides a further optimization possibility for the vibration behavior of the contact bridge.
  • each of the captive devices is coupled to the two associated with their fork-shaped end pieces of the contact bridge.
  • a current limiting unit according to the invention with a current limiting system according to the invention has a housing in which the current limiting system is arranged.
  • the current limiting system according to the invention can be attached as an attachment or accessory with its own housing to an existing installation switching device, such as a circuit breaker or a motor protection switch.
  • the current-limiting units are arranged spatially parallel to one another, and a current-limiting system for a single phase is arranged in the housing of each current-limiting unit. This is advantageous for current limiting in three-phase systems.
  • An inventive installation switching device is in particular a circuit breaker, circuit breaker or motor protection switch, with at least one contact point, a thermal and / or magnetic release and has a current limiting system according to the invention.
  • the contact point, the thermal and / or magnetic trigger and the current limiting system can be housed together in a housing.
  • FIG. 1 1 shows a current limiting system 1, which comprises a contact system 5 along a current path 2 between a first and a second terminal contact 3, 4.
  • the contact system 5 has four fixed contact pieces 6, 6a, 7, 7a, which are arranged in two opposite pairs of first 6, 6a and second 7, 7a fixed contact pieces.
  • the four fixed contact pieces 6, 6a, 7, 7a are electrically connected in pairs by means of conductor pieces 21, 21a crosswise to each other, so contact piece 6 with contact piece 7a and contact piece 6a with contact piece. 7
  • a movable contact pieces 8, 8a carrying movable contact bridge 9 is provided. This forms with the movable contact pieces 8, 8a in a first stable switching position, see FIG. 1 , a first closed double contact point 10 with the two first fixed contact pieces 6, 6a. In a second stable switching position, see FIG. 3 , the contact bridge 9 forms with its movable contact pieces 8, 8a a second closed double contact point 11 with the two second fixed contact pieces 7, 7a.
  • a bistable captive device 13 is provided for the contact bridge 9, which is coupled to the contact bridge 9 for setting the An Kirschwellives and / or the Sch Strukturschwellivess.
  • the tethering device 13 here comprises a bistable snap-action disc 14 which, via a coupling axis 15 with the contact bridge 9 is coupled. If the current falls below the closing threshold, then the Lorentz force F becomes smaller than the restoring spring force of the snap-action disc and the snap-action disc pushes the contact bridge into a stable position. Which of the two possible stable positions, top or bottom, is taken thereby, depends on which side of the dead center of the snap disk, the contact bridge at the occurrence of the event was straight. The closing threshold can thus be adjusted by the choice of the spring constant and the spring strength of the snap-action disc. In the stable position of the contact bridge 9, the restoring spring force of the snap disk 14 also acts as a contact pressure force with which the closed double contact point is held together.
  • the double contact points 10, 11 are provided with arc extinguishing devices 20, 20a.
  • arc extinguishing devices 20, 20a These are arc-quenching plate arrangements, as they are known in principle and in which the arc, guided on arc guide rails 22, 22a, 23, 23a, see FIG. 2 and 4 , forming a series of partial arcs, enters, whereby the arc voltage increases.
  • the contact system 1 comprises a magnet system 17 for driving the contact bridge 9 from its stable position into the respective other stable position.
  • the magnet system 17 has a magnetic core 18, for example made of steel, with an air gap, wherein the contact bridge 9 is arranged longitudinally displaceably in the air gap 19.
  • the current in the current path 2 passes in field windings arranged on both sides of the core 19, causing magnetization of the core 18.
  • the core 18 with the gap 19 concentrates the magnetic field in the core 19, and the contact bridge 9 runs in the gap 19. This has the consequence that the magnetic field direction B in the gap 19 is perpendicular to the current direction in the contact bridge 9, so that the contact bridge 9 is moved from its stable position to the other stable position when the An Jardinschwell learners of the current through the resulting Lorentz force F is exceeded.
  • the Lorentz force becomes so great that it overcomes the resiliency of the restraining means, such as the snap-action disc 14, and can start moving from its stable position.
  • the field windings 24, 24a for generating the magnetic field in the steel core 18 may be disposed on both sides of the steel core, as shown in the figures. However, only one field winding can be arranged on one side. In the example shown in FIG. 1 For example, one field winding 24 generates a repulsive magnetic field, and the other field winding 24 a generates an attractive magnetic field which acts on the contact bridge 9.
  • the contact bridge for example, the coupling axis 15 to control a separately arranged interrupt contact and thereby interrupt the circuit or protect the short-circuit current limiter against overloading.
  • the contact force and bondage, from which the contact bridge 9 lifts, is realized by a bistable snap spring arrangement 13. If this is pressed by the magnetic force F of the contact bridge 9, this tilts from a certain point of its first stable switching position in its second stable switching position and vice versa.
  • the bistable captive device 13c includes a compression spring 16 which is coupled via a coupling axis 15 with the contact bridge 9 so that the spring force of the compression spring 16 at an angle to the direction of the coupling axis 15 acts on this, that the compression spring 16, overcoming a Tot Vietnamese by the coupling axis 15 between a first and a second stable position is pivotable.
  • the compression spring 16 is here a cylinder spring, a cheap and common Kontrukomsbauteil.
  • each fork leg 9b, 9c, 9d, 9e carries a movable contact piece 8b, 8c, 8d, 8e.
  • a tying device 13a, 13b each in the form of a bistable snap spring arrangement is provided, each of the tethering devices 13a, 13b is coupled to the two associated fork-shaped end pieces 9b, 9c; 9d, 9e of the contact bridge 9.
  • FIG. 7 shows in a further embodiment, a current limiting system 1 ', which comprises a contact system 5 along a current path 2' between a first and a second terminal contact 3 ', 4'.
  • the contact system 5 has four fixed contact pieces 6, 6a, 7, 7a, which are arranged in two opposite pairs of first 6, 6a and second 7, 7a fixed contact pieces.
  • the four fixed contact pieces 6, 6a, 7, 7a are connected in pairs by means of conductor pieces 21, 21 a parallel electrically connected to each other, so contact piece 6 with contact piece 7 and contact piece 6a with contact piece 7a.
  • the connecting conductors between the first and second contact pieces come to rest against the edge of the magnet system.
  • the current flow in the field windings 24 and 24 takes place here in the same direction.
  • connection of the upper field winding 4 ' is now on the opposite side to the first terminal 3' of the field winding. Otherwise, the function of the current limiting system 1 'is analogous to that of the current limiting system 1, as described in detail above in connection with FIGS FIGS. 1 to 6 described.
  • the current limiting system 1, 1 ' can be mounted on another circuit breaker, for example a circuit breaker, circuit breaker, motor protection switch or the like, or it can be installed separately on a standard profile mounting rail and connected in series to a single circuit breaker or a group of circuit breakers ,
  • the current limiting system 1, 1 'according to the invention can be used both in DC systems and in AC systems.
  • a current limiting system 1, 1 'according to the invention By using a current limiting system 1, 1 'according to the invention, the tendency of the welding of circuit breakers to be reduced and the switching capacity and the operating voltage can be increased.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (15)

  1. Système de limitation du courant (1), lequel est conçu pour limiter un courant qui circule à travers le système de limitation du courant (1), sans toutefois l'interrompre de manière permanente, le système de limitation du courant (1) comprenant un système de contact (5) le long d'un chemin de courant (2) entre un premier et un deuxième contact de raccordement (3, 4),
    - le système de contact (5) possédant quatre pièces de contact fixes (6, 6a, 7, 7a) qui sont disposées en deux paires opposées de premières (6, 6a) et de deuxièmes (7, 7a) pièces de contact fixes,
    - un cavalier de contact (9) mobile comportant des pièces de contact mobiles (8, 8a) étant prévu,
    - le cavalier de contact (9) muni des pièces de contact mobiles (8, 8a), dans une première position de commutation stable, formant un premier point de double contact (10) fermé avec les deux premières pièces de contact fixes (6, 6a),
    - et le cavalier de contact (9), dans une deuxième position de commutation stable, formant un deuxième point de double contact (11) fermé avec les deux deuxièmes pièces de contact fixes (7, 7a), caractérisé en ce
    - que lorsque le courant devient supérieur à une valeur de seuil de déclenchement du système de limitation du courant (1), le cavalier de contact (9) effectue un va-et-vient entre la première et la deuxième position de commutation stables,
    - en produisant et en éteignant en alternance des arcs électriques (12, 12a) lors de l'ouverture et de la refermeture des premier ou deuxième points de double contact (10, 11),
    - et en ce que, lorsque le courant devient inférieur à une valeur de seuil de fermeture du système de contact (1), le cavalier de contact (9) s'immobilise dans l'une des deux positions de commutation stables.
  2. Système de limitation du courant (1) selon la revendication 1, caractérisé en ce que les quatre pièces de contact fixes (6, 6a, 7, 7a) sont reliées électriquement entre elles par paires en croix.
  3. Système de limitation du courant (1) selon la revendication 1, caractérisé en ce que les quatre pièces de contact fixes (6, 6a, 7, 7a) sont reliées électriquement entre elles par paires en parallèle.
  4. Système de limitation du courant selon la revendication 1, caractérisé en ce qu'il existe un dispositif d'amarrage bistable (13, 13a, 13b, 13c) pour le cavalier de contact (9), lequel est couplé avec le cavalier de contact (9) pour régler la valeur de seuil de déclenchement et/ou la valeur de seuil de fermeture.
  5. Système de limitation du courant (1) selon la revendication 4, caractérisé en ce que le dispositif d'amarrage (13) comprend une plaquette à déclic bistable (14) qui est couplée avec le cavalier de contact (9) par le biais d'un axe de couplage (15).
  6. Système de limitation du courant (1) selon la revendication 4, caractérisé en ce que le dispositif d'amarrage (13c) comprend un ressort de compression (16) qui est couplé avec le cavalier de contact (9) par le biais d'un axe de couplage (15) de telle sorte que la force de ressort du ressort de compression (16) agit sur l'axe de couplage (15) selon un angle par rapport au sens de coulissement de celui-ci de telle sorte que le ressort de compression (16) peut pivoter entre une première et une deuxième positions stables par le franchissement d'une position de point mort par l'axe de couplage (15).
  7. Système de limitation du courant (1) selon la revendication 1, caractérisé en ce que le système de contact (1) comprend un système magnétique (17) pour entraîner le cavalier de contact (9) de sa position stable dans l'autre position stable respective.
  8. Système de limitation du courant selon la revendication 7, caractérisé en ce que le système magnétique (17) comprend un noyau magnétique (18) avec un entrefer (19), le cavalier de contact (9) étant disposé dans l'entrefer (19) de manière à pouvoir coulisser longitudinalement, et en ce que le courant dans le chemin de courant (2) provoque une magnétisation du noyau (18) de sorte que le sens du champ magnétique dans l'entrefer (19) est perpendiculaire au sens du courant dans le cavalier de contact (9), de sorte que le cavalier de contact (9), en cas de dépassement de la valeur de seuil de déclenchement du courant, est déplacé de sa position stable dans l'autre position stable par la force de Lorentz qui en résulte.
  9. Système de limitation du courant (1) selon la revendication 1, caractérisé en ce que les points de double contact (10, 11) sont munis de dispositifs d'extinction d'arc électrique (20, 20a).
  10. Système de limitation du courant (1) selon la revendication 1, caractérisé en ce que les extrémités du cavalier de contact (9) sont fendues en forme de fourche, chaque branche de fourche (9b, 9c, 9d, 9e) comportant une pièce de contact mobile (8b, 8c, 8d, 8e).
  11. Système de limitation du courant (1) selon la revendication 10, caractérisé en ce qu'à chaque extrémité du cavalier il existe à chaque fois un dispositif d'amarrage (13a, 13b), chacun des dispositifs d'amarrage (13a, 13b) étant couplé avec les deux pièces d'extrémité (9b, 9c ; 9d, 9e) en forme de fourche qui lui sont associées du cavalier de contact (9).
  12. Unité de limitation du courant munie d'un système de limitation du courant (1) selon l'une des revendications précédentes, l'unité de limitation du courant présentant un boîtier dans lequel est disposé le système de limitation du courant.
  13. Unité de limitation du courant selon la revendication 12, caractérisée en ce qu'il est prévu un dispositif d'interrogation de mouvement mécanique ou électrique pour détecter le mouvement du cavalier de contact (9), lequel commande un contact d'interruption et peut ainsi interrompre le chemin de courant (2) ou peut protéger le limiteur de courant de court-circuit (1) contre une surcharge.
  14. Arrangement de plusieurs unités de limitation du courant selon la revendication 12, les unités de limitation du courant étant disposées en parallèle les unes avec les autres dans l'espace et un système de limitation du courant (1) pour une seule phase étant disposé dans le boîtier de chaque unité de limitation du courant.
  15. Appareillage d'installation, notamment disjoncteur de ligne, commutateur de puissance ou disjoncteur automatique, comprenant au moins un point de contact, un déclencheur thermique et/ou magnétique et un système de limitation du courant (1) selon l'une des revendications 1 à 11.
EP20120005541 2011-08-02 2012-07-30 Système de limitation de courant Not-in-force EP2555217B1 (fr)

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Application Number Priority Date Filing Date Title
DE102011109279 2011-08-02

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EP2555217A1 EP2555217A1 (fr) 2013-02-06
EP2555217B1 true EP2555217B1 (fr) 2014-01-15

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CN103151191A (zh) * 2013-03-02 2013-06-12 肖国选 电气速动开关
CN107533926B (zh) 2015-04-24 2019-03-29 Abb瑞士股份有限公司 旁路开关、提供导电路径的方法和功率***
CN107452549B (zh) * 2016-05-31 2020-03-31 比亚迪股份有限公司 继电器
CN113208253B (zh) * 2021-04-30 2023-12-19 深圳市中诺通讯有限公司 一种保护套和保护套控制数码产品的方法
CN113223901B (zh) * 2021-05-06 2022-02-15 深圳瑞能电气设备有限公司 可在接地电流过大时提供限流保护的交流双电切换装置

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