EP1267368B1 - Verteilungstransformator mit einem durch Sekundärabkürzungauslösenden Leistungsschalter Selbstschutz - Google Patents

Verteilungstransformator mit einem durch Sekundärabkürzungauslösenden Leistungsschalter Selbstschutz Download PDF

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Publication number
EP1267368B1
EP1267368B1 EP20020354044 EP02354044A EP1267368B1 EP 1267368 B1 EP1267368 B1 EP 1267368B1 EP 20020354044 EP20020354044 EP 20020354044 EP 02354044 A EP02354044 A EP 02354044A EP 1267368 B1 EP1267368 B1 EP 1267368B1
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EP
European Patent Office
Prior art keywords
blade
circuit
primary
circuit breaker
tank
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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
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EP20020354044
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English (en)
French (fr)
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EP1267368A1 (de
Inventor
Jacques Schneider Electric Industries SA Fabbro
Philippe Schneider Electric Industr. SA Maréchal
Christophe Schneider Electric Industr. SA Preve
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H01H71/443—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay with dash-pot

Definitions

  • the invention relates to a primary MV / MV or secondary MV / LV distribution transformer, the windings of which are immersed in a liquid or a dielectric gas contained in a tank, and which is provided with an integrated protection device for to limit the effects of an internal transformer failure as well as failures at the secondary terminals of the transformer. More precisely, it relates to a transformer whose protection device is disposed inside the transformer tank, forming with the latter a functional and material unit which is called a self-protected transformer.
  • the protection device is connected to the primary circuit and comprises a circuit breaker controlled by tripping means and fuses, arranged upstream of the circuit breaker.
  • the fuses, the circuit breaker and the tripping means are associated in such a way that under conditions corresponding to a short-circuit at the terminals of the secondary circuit of the transformer, the contact elements of the circuit-breaker separate and interrupt the current without starting a melting the fuses, and that there exists a threshold value of the current flowing through each fuse, less than the breaking capacity of the corresponding pole of the circuit breaker and beyond which the fuse is melted before a separation order contact members given by the tripping means could cause the separation of the contacts.
  • the triggering means comprise a current triggering device comprising a means for measuring the intensity of the current flowing in a secondary phase of the transformer.
  • the document does not specify how the information obtained by the measuring means must be transmitted to the triggering means. But the means of measurement are located near the secondary phase conductors, while the circuit breaker is located on the primary side of the transformer, away from the secondary phase conductors.
  • the invention therefore aims at providing a self-protected transformer whose triggering means are simple and reliable over the lifetime of the installation, more than 20 years.
  • the triggering device is disposed inside the tank, so that the transformer constitutes, with its means of protection, a functional and material unit delimited by the tank, which corresponds very exactly to the concept of self-protected transformer.
  • the electromechanical relay of each phase is intended to be disposed closer to the secondary phase conductors, while the circuit breaker is disposed in the primary circuit.
  • the transmission kinematic chain allows mechanical transmission of the tripping order from one to the other. It also provides the logical "OR" function between the trip commands that may be given by the relays of each of the phases. This avoids any electronic transmission device, by nature less reliable over the lifetime of the equipment concerned.
  • the mechanical transmission chain by definition, only transmits the kinetic energy delivered by the relay, up to the tripping latch of the circuit breaker. It does not implement an energy storage intermediate mechanism, for example a spring mechanism released by an intermediate lock. In other words, the energy required to move the latch of the circuit breaker from its lock position to its trip position is provided by the electromechanical relay and not by any other accumulation system.
  • This type of direct drive is possible because the electromagnetic power available in case of secondary short circuit is sufficiently large, so that we can recover some of this power at low cost using a simple electromechanical converter, to drive the transmission kinematic chain.
  • the overcurrent triggering device further comprises, for each pallet, a timer device, introducing a delay between the setting in motion of the pallet and the arrival of the trigger lock in the release position.
  • This timer introduces a delay in the response of the electromechanical relay, which ensures the chronometric selectivity between the transformer circuit breaker and the protection means located downstream of the transformer.
  • the timer delays the opening order of the circuit breaker, leaving the circuit breakers and / or fuses located downstream of the transformer, outside the tank, on the secondary network, the time to cut the circuit breaker. line responsible for the defect.
  • the timer device of each pallet comprises a dissipating element of the energy by friction, and applying to the pallet a resistant force all the more important that the pallet has a significant kinetic energy.
  • the dielectric is a viscous liquid, the timer device comprising at least one brake immersed in said viscous dielectric. The desired function is thus obtained very economically.
  • the timer device of each pallet comprises a link with a dead stroke such that the pallet does not drive the output member until the pallet has covered a dead stroke between the rest position and the trigger order position.
  • the transmission kinematic chain comprises a transmission shaft and, for each secondary phase, unidirectional coupling means between the pallet and the transmission shaft, able to transmit to the transmission shaft the force motor electromagnetic applied by the magnetic circuit fixed to the pallet.
  • the transmission shaft is provided with a return spring to a rest position.
  • the fixed magnetic circuit comprises for each secondary phase a piece of ferromagnetic material having an air gap, the pallet also being made of a ferromagnetic material and disposed in the gap so as to form with the piece of ferromagnetic material a magnetic circuit with variable reluctance having a reluctance that decreases as the pallet moves from the home position to the trip order position.
  • the pallet Once the threshold defined by the elastic return means is exceeded, the pallet begins to move to its trigger order position. As soon as this movement starts, the reluctance of the magnetic circuit decreases, therefore, at constant current intensity in the secondary phase concerned, the instantaneous power and the electromagnetic force transmitted to the pallet increase.
  • the motion continues inevitably until the pallet has reached the trip order position. If, on the other hand, the short-circuit conditions disappear before the pallet concerned has reached its triggering order position, the electromagnetic driving force on the pallet instantly disappears while the pallet is subjected to the restoring force of the elastic return means. and that the timer device is opposed to further movement of the pallet.
  • the inertia of the pallet and the transmission chain being negligible compared to the other quantities involved, there is consequently a near-immediate stop of the pallet, then its return to the rest position.
  • the tripping means of the circuit breaker further comprise a transducer sensitive to the temperature and / or the pressure of the dielectric fluid in the tank, and passing from a deactivated position to an activated position when the fluid temperature exceeds a threshold of given temperature and / or that the pressure of the fluid passes a given pressure threshold, the transmission kinematic chain being arranged such that when the transducer goes from its deactivated position to its activated position, the transmission kinematic chain causes the lock towards its trigger position.
  • the circuit breaker must also prevent faults occurring inside the transformer.
  • the temperature of the fluid and its pressure are good indicators of the correct operation of the transformer and it is particularly advantageous to use the same transmission chain for all the triggering means.
  • the set obtained is particularly inexpensive.
  • the protection device further comprises, for each primary phase, arranged in the tank, in the primary electrical circuit in series between the primary bushings and the circuit breaker, fuses having a breaking capacity sufficient to ensure the breaking of the phase corresponding in case of short circuit of the primary circuit.
  • the main function of fuses is to deal with the case of the primary short circuit.
  • a three-phase distribution transformer MT / MT or MT / BT 10 comprises, inside a sealed tank 12 containing a dielectric fluid 14, in this case a high dielectric strength oil having a higher viscosity than the water, a primary electrical circuit 16 and a secondary electrical circuit 18.
  • the primary electrical circuit 16 connects primary vias 20, disposed on a cover 22 of the tank 12, to the primary windings 24 of the transformer.
  • An electrical protection device internal to the tank is arranged in series between the bushings 20 and the primary windings 24, so as to cut off the power supply of the primary windings 24 in the event of an electrical fault.
  • This protection device comprises fuses 26 located as close as possible to the primary bushings 24, possibly partially inserted into the primary bushings 24, and a circuit-breaker 28 arranged downstream of the fuses 26.
  • fuses 26 located as close as possible to the primary bushings 24, possibly partially inserted into the primary bushings 24, and a circuit-breaker 28 arranged downstream of the fuses 26.
  • the secondary electrical circuit 18 of the transformer 10 connects the secondary windings 30 of the transformer 10 to the secondary feedthroughs 32, via secondary phase conductors 34 and, if appropriate, a distribution conductor of the neutral 36.
  • trigger 40 ensure the tripping of the circuit breaker.
  • electromechanical relays 42 sensitive to the currents flowing in the phases 34 of the secondary circuit of the transformer, and possibly a transducer 44 sensitive to the pressure of the dielectric fluid and / or a transducer 46 sensitive to the temperature of the dielectric fluid.
  • a kinematic chain 50 transmits the trip commands from the different electromechanical relays 42 and transducers 44, 46 to the circuit breaker 28.
  • the circuit breaker 28 is supported by a frame 52 fixed on the inner face of the cover 22 of the transformer tank.
  • This circuit breaker comprises a drive mechanism (not shown) of a switching shaft 54, this shaft carrying three cranks 56 each driving a movable contact 58 of a vacuum interrupter 60.
  • the mechanism is controlled by a trigger latch 62 which pivots about a fixed geometrical axis with respect to the frame, between a locking position in which it locks the mechanism in the closed position of the contacts, and a release position in which it releases the mechanism that causes the separation of the contacts.
  • the trigger lock is returned to the locking position by a return spring not shown.
  • the conductors 34, 36 of the secondary circuit consist of metal bars passing through the transformer cover at the bushings.
  • the secondary bushings 32 are arranged at a distance from the circuit breaker 28. Indeed, although it has not been shown on the Figures 2 to 4 For the sake of clarity, the primary vias 20 and the primary fuses 26, however, can be distinguished on the cover 22 through the through holes 64 of the primary vias 20, which are necessarily close to the circuit breaker 28, between the latter and the bushings. secondary 32.
  • the electromechanical relays 42 of the three secondary phases 34 are disposed at the level of the secondary bushings 32, inside the tank 12. They are identical, so that only one will be described for the sake of simplification.
  • the relay 42 comprises a fixed magnetic circuit 70 formed by a piece of U-shaped ferromagnetic material, surrounding the corresponding secondary phase conductor 34 and concentrating the electromagnetic field lines in a gap.
  • the fixed magnetic circuit 70 is disposed in a plane perpendicular to the axis of flow of the current in the phase conductor 34, that is to say in the plane of the figure 3 .
  • a pallet 72 pivoting about an axis 74 perpendicular to the plane of the figure 3 .
  • the pallet 72 is itself made of ferromagnetic material.
  • the pallet 72 is extended by an arm 80 forming a crank, carrying at its free end an axis 82 of pivoting of a rigid rod 84.
  • the rod 84 forms a rod which cooperates, at its end opposite the pallet 72, with a crank receiver 86 of a transmission shaft 88. More specifically, the end of the rod 84 is bent to form a hook 90 visible on the figure 4 , which fits into a slot 92 of the receiving crank 86, so as to form with the receiving crank 86 a unidirectional coupling.
  • a friction plate 94 is attached to the rod 84.
  • the shaft 88 has as many receiving cranks 86 as there are secondary phases and electromechanical relays 42.
  • the shaft 88 pivots in three bearings 96 arranged on fixed support flanges 98 secured to the cover 22 of the vessel . At its end closest to the circuit breaker, it forms a return arm 102 to attack the trigger latch 62 of the circuit breaker.
  • the shaft 88 is biased counterclockwise towards its rest position of the figure 3 by a return spring 104.
  • the oil constituting the dielectric fills the tank to the cover, so that the circuit breaker 28, the electromechanical relays 42 and the kinematic transmission chain 50 constituted by the rods 84 provided with their plates 94 and the shaft 88 provided with its receiving cranks 86 and its return arm 102, are completely immersed in the oil.
  • the transformer protection device operates as follows.
  • each pallet 72 At nominal speed or in the presence of overload currents, the electromagnetic forces on each pallet 72 are insufficient to compensate for the threshold set by the partially-biased return spring 78, so that each pallet 72 remains in its rest position shown on FIG. figure 3 , against the limit stop 76.
  • the overload currents will therefore be taken into account exclusively by the protection devices located downstream of the transformer tank.
  • the tension of the spring 78 thus makes it possible to ensure the amperometric selectivity of the installation.
  • the hook 90 of the rod then drives the transmission shaft 88 in rotation in the direction of clockwise on the figure 2 .
  • this movement is slowed by the presence of the corresponding plate 94 which, in order to overcome the resistance generated by the oil which it displaces, opposes the movement of the rod 84.
  • the return arm 102 drives the latch 62 in the counterclockwise direction.
  • the shape of the pallet 72 is such that the distance separating the pallet from the walls of the fixed magnetic circuit decreases rapidly during the rotation of the pallet in the counterclockwise direction.
  • the reluctance of the overall magnetic circuit including the pallet 72 decreases rapidly and, for a current of short circuit of given intensity, the electromagnetic forces exerted on the pallet increase.
  • the moment of the electromagnetic forces with respect to the axis of rotation 74 of the pallet also increases, although less rapidly, due to the decrease of the corresponding lever arm due to the rotation. Overall, this rapid increase in the moment of the electromagnetic forces ensures, at constant short-circuit intensity, a continuous acceleration of the rotation of the pallet 72.
  • the pallet 72 thus continues its movement and carries with it all of the kinematic chain 50 constituted by the rod 84, the transmission shaft 88 and the return arm 102.
  • the return arm 102 brings the trip latch 62 into a trip position.
  • the latch 62 releases the mechanism of the circuit breaker 28 which drives the switching shaft 54 and the contacts 58 into a separation position, cutting off the power to the primary circuit 16 of the transformer.
  • a secondary protection device such as a fused fuse or circuit breaker, located downstream of the transformer tank on the secondary line where the fault appeared, opens the circuit sufficiently quickly.
  • intensity of the current in the conductor 34 and induction flux it induces in the air gap of the fixed magnetic circuit 70 decrease before the rotation of the shaft has caused the tripping of the circuit breaker.
  • the moving moving masses are small and relatively negligible compared to the forces of the return springs 78, 104 and the resistant forces of the plates 94, so that the general movement of the chain kinematic 50 in the direction of the triggering stops almost instantaneously.
  • the pallet 72 and the shaft 88 then return to their rest position under the joint solicitation of their respective return springs 78, 104.
  • the plates 94 are dimensioned so as to provide sufficient time for the cutoff to actually take place downstream of the transformer whenever possible.
  • the plates thus provide a chronometric selectivity at very low cost.
  • the objective is to cause the tripping of the secondary fault circuit breaker only when it occurs between the tank and the protection means located downstream of the tank, that is to say when the fault does not occur. can be neither detected nor eliminated at the means of protection located downstream of the tank.
  • vanes 72 and corresponding rods 84 remain stationary and do not hinder the rotation of the shaft 88 driven by the pallet of the phase in short -circuit. Indeed, any rod 84 stationary in its rest position slides freely in the slot 92 of the corresponding receiving crank when it rotates clockwise on the figure 4 .
  • the duration of the tripping delay must be essentially identical in the case where the short-circuit occurs between a phase and the neutral, in the case of a short-circuit between two phases and in the case of a three-phase short circuit. This is why it is preferable to provide each phase with a friction plate 94, rather than having a single plate at the shaft.
  • the delay function can be obtained by any mechanical means, in particular by any device that dissipates energy by fluid or solid friction.
  • the delay can also be obtained by a dead stroke of one of the elements of the transmission chain, preferably independently for each pallet.
  • a dead stroke of one of the elements of the transmission chain preferably independently for each pallet.
  • the embodiment of the figure 5 differs from the first embodiment only in that the end of the rod 184 carrying the hook has been lengthened, so that the hook 190 does not begin to drive the shaft after covering a certain distance in the slot 92.
  • the pallet 72 first covers a certain dead stroke by driving the rod 184 against the return force of the spring 78, before the hook comes into contact with the receiving crank 86 and does not begin to drive the shaft 88.
  • this device has the disadvantage of imposing a greater stroke of the pallet 72 between the rest position and the trip order position. It is also possible to combine a dead link with an energy dissipating device such as the plate 194, which is shown in dashed line on the figure 5 to translate its optional character.
  • the pallet is not necessarily a pivoting part. It may for example be replaced by a moving part in translation.
  • the multifunctional shaft 88 of the embodiment can be replaced by several parts, for example: a part providing the logical function "OR" between the displacements of the different relays, another part ensuring the mechanical transmission of this movement from a distance, up to to the trigger lock.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Transformers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (10)

  1. - Verteilertransformator mit
    - einem Gefäß (12), das mit einem flüssigen oder gasförmigen Dielektrikum (14) gefüllt ist,
    - einem Dreiphasen-Primärstromkreis (16) mit in das Dielektrikum (14) eingetauchten Primärwicklungen (24),
    - primärseitigen Stromdurchführungen (20), mit denen der Primärstromkreis an ein außerhalb des Gefäßes angeordnetes elektrisches Primärnetz angeschlossen werden kann,
    - einem Dreiphasen-Sekundärstromkreis (18) mit in das Dielektrikum (14) eingetauchten Sekundärwicklungen (30),
    - sekundärseitigen Stromdurchführungen (32), mit denen der Sekundärstromkreis (18) an ein außerhalb des Gefäßes (12) angeordnetes Sekundärnetz angeschlossen werden kann,
    - sowie einer Schutzeinrichtung, die
    - einen im Gefäß angeordneten, zwischen die primärseitigen Stromdurchführungen (20) und die Primärwicklungen (24) in den Primärstromkreis (16) geschalteten Leistungsschalter (28), welcher Leistungsschalter (28) eine zwischen einer Verriegelungsstellung und einer Auslösestellung bewegbare Auslöseklinke (62) umfasst,
    - sowie Auslösemittel (40) des Leistungsschalters mit einer Überstrom-Auslöseeinrichtung umfasst,
    dadurch gekennzeichnet, dass die Überstrom-Auslöseseinrichtung folgende, im Gefäß (12) angeordnete Teile umfasst:
    - ein in jede Phase (34) des Sekundärstromkreises (18) des Transformators geschaltetes elektromechanisches Relais (42) mit
    - einem zwischen einer Ruhestellung und einer Auslösebefehlsstellung bewegbaren Anker (72),
    - einem feststehenden Magnetkreis (70) zur Beaufschlagung des Ankers (72) mit einer elektromagnetischen Antriebskraft, die mir der Höhe des über die betreffende Phase des Sekundärstromkreises des Transformators fließenden Stroms zunimmt,
    - einem elastischen Rückstellmittel (78) zur Rückführung des Ankers (72) in die Ruhestellung, das den Anker (72) in der Ruhestellung mit einem bestimmten Schwellwert einer Rückstellkraft beaufschlagt,
    - sowie eine zwischen dem elektromagnetischen Relais (42) und der Auslöseklinke (62) des Leistungsschalters angeordnete kinematische Übertragungskette (50) mit einem Endglied (102), das die Auslöseklinke des Leistungsschalters von ihrer Verriegelungsstellung in ihre Auslösestellung überführt, wenn sich der Anker (72) des elektromagnetischen Relais (42) irgendeiner der Phasen (34) des Sekundärstromkreises von der Ruhestellung in die Auslösebefehlsstellung verschiebt.
  2. - Transformator nach Anspruch 1, dadurch gekennzeichnet, dass die Überstrom-Auslöseeinrichtung außerdem für jeden Anker eine Zeitverzögerungseinrichtung (94) umfasst, die eine zeitliche Verzögerung zwischen dem Beginn der Bewegung des Ankers und dem Erreichen der Auslösestellung durch die Auslöseklinke bewirkt.
  3. - Transformator nach Anspruch 2, dadurch gekennzeichnet, dass die Zeitverzögerungseinrichtung jedes Ankers ein Element umfasst, das Energie durch Reibung abbaut und den Anker mit einer Widerstandskraft beaufschlagt, die umso größer ist, je höher die kinetische Energie des Ankers ist.
  4. - Transformator nach Anspruch 3, dadurch gekennzeichnet, dass das Dielektrikum (14) eine viskose Flüssigkeit ist und die Zeitverzögerungseinrichtung mindestens eine in die genannte viskose Flüssigkeit eingetauchte Bremse (94) umfasst.
  5. - Transformator nach irgendeinem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Zeitverzögerungseinrichtung jedes Ankers einen Freilaufmechanismus umfasst, derart dass der Anker das Endglied (102) erst dann mitführt, wenn der Anker eine bestimmte Freilaufstrecke zwischen der Ruhestellung und der Auslösebefehlsstellung zurückgelegt hat.
  6. - Transformator nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die kinematische Übertragungskette (50) eine Antriebswelle (88) und für jede Phase (34) des Sekundärstromkreises ein zwischen dem Anker (72) und der Antriebswelle (88) angeordnetes Kupplungselement (90, 92) mit einer Wirkrichtung umfasst, das dazu ausgelegt ist, die vom feststehenden Magnetkreis (70) auf den Anker (72) ausgeübte elektromagnetische Antriebskraft auf die Antriebswelle (88) zu übertragen.
  7. - Transformator nach Anspruch 6, dadurch gekennzeichnet, dass die Antriebswelle (88) eine in Richtung einer Ruhestellung wirkende Rückstellfeder (104) umfasst.
  8. - Transformator nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der feststehende Magnetkreis (70) für jede Phase (34) des Sekundärstromkreises ein Teil aus einem ferromagnetischen Material mit einem darin ausgebildeten Luftspalt umfasst, wobei der Anker (72) ebenfalls aus einem ferromagnetischen Material besteht und im Luftspalt angeordnet ist, so dass er mit dem Teil aus ferromagnetischem Material einen Magnetkreis mit veränderlichem magnetischem Widerstand bildet, welcher magnetische Widerstand abnimmt, wenn sich der Anker von der Ruhestellung in die Auslösebefehlsstellung verschiebt.
  9. - Transformator nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Auslösemittel des Leistungsschalters außerdem ein die Temperatur und/ oder den Druck des Flüssigdielektrikums erfassenden Messwandler (46) bzw. (48) umfassen, der von einem passiven Zustand in einen aktiven Zustand übergeht, wenn die Temperatur der Flüssigkeit einen Temperatur-Schwellwert und/oder der Druck der Flüssigkeit einen bestimmten Druck-Schwellwert überschreitet, wobei die kinematische Übertragungskette (50) so angeordnet ist, dass beim Übergang des Messwandlers (46, 48) von seiner passiven in seine aktive Stellung die kinematische Übertragungskette (50) die Klinke (62) in ihre Auslösestellung überführt.
  10. - Transformator nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schutzeinrichtung außerdem Schmelzsicherungen für jede Phase des Primärstromkreises umfasst, die im Gefäß angeordnet und jeweils zwischen die primärseitigen Stromdurchführungen und den Leistungsschalter in den Primärstromkreis geschaltet sind sowie ein ausreichend hohes Ausschaltvermögen besitzen, um die Abschaltung der entsprechenden Phase im Falle eines primärseitigen Kurzschlusses zu gewährleisten.
EP20020354044 2001-06-15 2002-03-14 Verteilungstransformator mit einem durch Sekundärabkürzungauslösenden Leistungsschalter Selbstschutz Expired - Lifetime EP1267368B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107821 2001-06-15
FR0107821A FR2826173B1 (fr) 2001-06-15 2001-06-15 Transformateur de distribution auto-protege par un disjoncteur declenchant sur court-circuit secondaire

Publications (2)

Publication Number Publication Date
EP1267368A1 EP1267368A1 (de) 2002-12-18
EP1267368B1 true EP1267368B1 (de) 2008-08-06

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EP20020354044 Expired - Lifetime EP1267368B1 (de) 2001-06-15 2002-03-14 Verteilungstransformator mit einem durch Sekundärabkürzungauslösenden Leistungsschalter Selbstschutz

Country Status (7)

Country Link
EP (1) EP1267368B1 (de)
CN (1) CN1260747C (de)
BR (1) BRPI0202260B1 (de)
DE (1) DE60228022D1 (de)
ES (1) ES2309139T3 (de)
FR (1) FR2826173B1 (de)
NO (1) NO321891B1 (de)

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Publication number Priority date Publication date Assignee Title
EP2075807B1 (de) 2007-12-28 2014-09-17 Constructora de Transformadores de Distribucion Cotradis, S.L.U. Elektrische Vorrichtung für ein Verteilungsnetzwerk mit Fehlererkennung, Abschalt- und Entfernungssystem
EP2653875B1 (de) * 2012-04-20 2014-09-10 ABB Technology AG Rogowski-Stromwandler und Anordnung zum Messen eines Stromes
JP6490787B2 (ja) * 2014-07-10 2019-03-27 アーベーベー・シュバイツ・アーゲー ガス絶縁された器具を備える電気装置、特にガス絶縁されたトランスまたはリアクタ
FR3069367B1 (fr) * 2017-07-18 2019-08-09 Transfix Appareil electrique a enroulements comprenant des moyens de protection contre les surintensites
RU199663U1 (ru) * 2020-03-25 2020-09-14 Федеральное государственное унитарное предприятие «Всероссийский научно-исследовательский институт автоматики им.Н.Л.Духова» (ФГУП «ВНИИА») Контактное устройство

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Publication number Priority date Publication date Assignee Title
GB156462A (en) * 1920-06-11 1921-01-13 Carlo Zorzi Apparatus for the automatic protection of three-phase current circuits
PL92595B1 (de) * 1974-11-28 1977-04-30
FR2782409B1 (fr) * 1998-08-14 2002-11-29 Schneider Electric Ind Sa Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles

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NO20022829L (no) 2002-12-16
ES2309139T3 (es) 2008-12-16
NO321891B1 (no) 2006-07-17
BRPI0202260B1 (pt) 2016-09-27
FR2826173B1 (fr) 2003-08-15
CN1392577A (zh) 2003-01-22
EP1267368A1 (de) 2002-12-18
BR0202260A (pt) 2003-04-01
CN1260747C (zh) 2006-06-21
FR2826173A1 (fr) 2002-12-20
NO20022829D0 (no) 2002-06-13
DE60228022D1 (de) 2008-09-18

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