EP1267368A1 - Transformateur de distribution auto-protégé par un disjoncteur déclenchant sur court-circuit secondaire - Google Patents
Transformateur de distribution auto-protégé par un disjoncteur déclenchant sur court-circuit secondaire Download PDFInfo
- Publication number
- EP1267368A1 EP1267368A1 EP02354044A EP02354044A EP1267368A1 EP 1267368 A1 EP1267368 A1 EP 1267368A1 EP 02354044 A EP02354044 A EP 02354044A EP 02354044 A EP02354044 A EP 02354044A EP 1267368 A1 EP1267368 A1 EP 1267368A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pallet
- circuit
- primary
- circuit breaker
- phase
- 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
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Classifications
-
- 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 MV / MV primary distribution transformer or secondary MV / LV, the windings of which are immersed in a liquid or gas dielectric contained in a tank, and which is fitted with an integrated protection device, intended to limit the effects of an internal transformer failure as well as the failures at the secondary terminals of the transformer. More specifically, it relates to a transformer, the protection device of which is arranged inside the tank of the transformer, forming with it a functional and material unit that we called self-protected transformer.
- the protection device is connected to the primary circuit and includes 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 to transformer secondary circuit terminals, the circuit breaker contact members are separate and interrupt the current without the fuses starting, and there is a threshold value for the intensity of the current passing through each fuse, lower than the breaking capacity of the corresponding pole of the circuit breaker and beyond which the fusion of the fuse is completed before an order for separation of the contact members given by the tripping means could have caused the separation of the contacts.
- the triggering means comprise a trigger device with maximum current including means for measuring the intensity of the current flowing in a secondary phase of the transformer.
- the means of measurement are located near the secondary phase conductors, while the circuit breaker is located on the primary side of transformer, away from secondary phase conductors.
- the invention therefore aims to provide a self-protected transformer whose means are simple and reliable over the lifetime of the installation, i.e. more than 20 years.
- the trigger device is arranged inside the tank, so that the transformer constitutes, with its means of protection, a functional unit and material delimited by the tank, which corresponds exactly to the concept of self-protected transformer.
- the electromechanical relay of each phase is intended to be placed as close as possible secondary phase conductors, while the circuit breaker is placed in the circuit primary.
- the drive train allows a mechanical transmission of the triggering order from one to the other. It also performs the logic function "OR" between the trigger orders likely to be given by the relay each of the phases. This avoids any electronic transmission device, by nature less reliable over the life of the equipment concerned.
- the mechanical transmission chain by definition, only transmit the kinetic energy delivered by the relay, up to the trigger lock of the breaker. It does not use an intermediate accumulator mechanism energy, for example a spring mechanism released by an intermediate lock. In in other words, the energy required to move the circuit breaker latch from its position locking to its tripping position is provided by the electromechanical relay and not by another system of accumulation.
- This type of direct training is possible because the electromagnetic power available in the event of a secondary short circuit sufficiently large, so that part of this can be recovered low cost power using a simple electromechanical converter to train the drive train.
- the overcurrent trigger device comprises in in addition, for each pallet, a timer device, introducing a delay between setting in movement of the pallet and the arrival of the trigger lock in the position of trigger.
- This timer introduces a delay in the response of the relay electromechanical, which ensures chronometric selectivity between the circuit breaker of the transformer and the protection means located downstream of the transformer.
- the timer delays the order to open the circuit breaker, leaving circuit breakers and / or fuses located downstream of the transformer, outside the tank, on the secondary network, time to cut the line responsible for the fault. This allows limit tripping of the circuit breaker located in the transformer tank, only critical cases where the fault occurred between the secondary crossings and the means of protection located downstream of the transformer tank.
- the timer device of each pallet has an element dissipating energy by friction, and applying to the pallet a resisting force all the more important as the pallet has a high kinetic energy.
- the dielectric is a viscous liquid, the timer device comprising at least one brake immersed in said viscous dielectric.
- the timer device of each pallet has a dead travel link such that the pallet does not drive the output member as long as the pallet has not covered a dead travel between the rest position and the position trigger order.
- the transmission kinematic chain comprises a drive shaft and, for each secondary phase, a coupling means unidirectional between the pallet and the drive shaft, suitable for transmitting to the drive shaft transmission the electromagnetic driving force applied by the fixed magnetic circuit to the palette.
- the drive shaft is provided with a return spring to a position of rest.
- the fixed magnetic circuit comprises for each phase secondary a piece of ferromagnetic material having an air gap, the pallet being also in ferromagnetic material and arranged in the air gap so as to form with the piece of ferromagnetic material a magnetic circuit with variable reluctance having a reluctance which decreases when the pallet goes from the rest position to the trigger order position.
- the threshold defined by the reminder means elastic is exceeded, the pallet begins to move towards its order position of trigger. As soon as this movement begins, the reluctance of the magnetic circuit decreases, therefore, at constant current intensity in the secondary phase concerned, the instantaneous power and electromagnetic force transmitted to the pallet increase.
- the circuit breaker tripping means include in addition to a transducer sensitive to the temperature and / or pressure of the dielectric fluid in the tank, and going from a deactivated position to an activated position when the fluid temperature exceeds a given temperature threshold and / or the fluid pressure passes a given pressure threshold, the transmission kinematic chain being arranged such that when the transducer switches from its deactivated position to its position activated, the drive train drives the lock to its position trigger.
- the circuit breaker must also prevent faults occurring at inside the transformer. Fluid temperature and 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 means of trigger. The assembly obtained is particularly inexpensive.
- the protection device also comprises, for each phase primary, arranged in the tank, in the primary electrical circuit in series between the primary bushings and the circuit breaker, fuses with sufficient breaking capacity to ensure the breaking of the corresponding phase in the event of a short circuit in the circuit primary.
- the main function of fuses is to deal with a short circuit primary.
- a three-phase MV / MV distribution transformer or MT / BT 10 includes, inside a sealed tank 12 containing a dielectric fluid 14, in this case an oil with high dielectric strength having a higher viscosity water, a primary electrical circuit 16 and a secondary electrical circuit 18.
- the circuit primary electric 16 connects primary bushings 20, arranged on a cover 22 of the tank 12, to the primary windings 24 of the transformer.
- a protection device electric internal to the tank is arranged in series between the bushings 20 and the windings primary 24, so as to cut the power supply to the primary windings 24 in the event of an electrical fault.
- This protection device comprises fuses 26 located at the closer to the primary crossings 24, possibly partially inserted in the primary bushings 24, and a circuit breaker 28 disposed downstream of the fuses 26.
- the secondary electrical circuit 18 of the transformer 10 connects the secondary windings 30 of the transformer 10 to secondary crossings 32, via secondary phase conductors 34 and, the if necessary, a neutral distribution conductor 36.
- Triggering means 40 ensure tripping of the circuit breaker.
- relays electromechanical 42 sensitive to currents flowing in phases 34 of the circuit secondary 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 fluid dielectric.
- a kinematic chain 50 ensures the transmission of orders from tripping from the various electromechanical relays 42 and transducers 44, 46 at circuit breaker 28.
- the circuit breaker 28 is supported by a fixed frame 52 on the internal face of the cover 22 of the transformer tank.
- This circuit breaker has 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 lock 62 which pivots about an axis geometric fixed with respect to the chassis, between a locking position in which it locks the mechanism in the closed position of the contacts, and a position trigger in which it releases the mechanism that causes the separation of contact.
- the trigger lock is returned to the locked position by a spring not shown.
- the conductors 34, 36 of the secondary circuit are constituted by bars through the transformer cover at the bushings.
- the secondary bushings 32 are located at a distance from the circuit breaker 28. Indeed, although we have not shown in FIGS. 2 to 4, for the sake of clarity, the primary bushings 20 and primary fuses 26, there are however on the cover 22 the through holes 64 of the primary bushings 20, which are necessarily located proximity of the circuit breaker 28, between the latter and the secondary bushings 32.
- the electromechanical relays 42 of the three secondary phases 34 are arranged at level of the secondary bushings 32, inside the tank 12. They are identical, of so that only one will be described for the sake of simplification.
- Relay 42 includes a fixed magnetic circuit 70 formed by a piece of U-shaped ferromagnetic material, surrounding the corresponding secondary phase conductor 34 and concentrating the lines of electromagnetic field in an air gap.
- the fixed magnetic circuit 70 is arranged in a plane perpendicular to the axis of current flow in the phase conductor 34, that is to say in the plane of Figure 3.
- a pivoting pallet 72 around an axis 74 perpendicular to the plane of FIG. 3.
- the pallet 72 is itself made of ferromagnetic material.
- the pallet 72 is extended by an arm 80 forming a crank, bringing to its free end a pivot axis 82 of a rigid rod 84.
- the rod 84 forms a connecting rod which cooperates, at its end opposite to the pallet 72, with a crank receiving 86 of a transmission shaft 88. More precisely, the end of the rod 84 is curved to form a hook 90 visible in 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 fixed to the rod 84.
- the shaft 88 has as much 86 receiving cranks that there are secondary and relay phases electromechanical 42.
- the shaft 88 spins in three bearings 96 arranged on flanges 98 fixed support integral with the cover 22 of the tank. At its end closest to the circuit breaker, it forms a deflection arm 102 coming to attack the release lock 62 of the circuit breaker. Tree 88 is recalled counterclockwise towards its rest position in FIG. 3 by a return spring 104.
- the oil constituting the dielectric fills the tank up to the lid, so that the circuit breaker 28, the electromechanical relays 42 as well as the kinematic chain of transmission 50 constituted by the rods 84 provided with their plates 94 and the shaft 88 provided of its receiving cranks 86 and its deflection arm 102, are completely submerged in oil.
- the transformer protection device operates as follows.
- each pallet 72 In nominal mode or in the presence of overload currents, the forces electromagnetic on each pallet 72 are insufficient to compensate for the set threshold by the return spring 78 partially bandaged, so that each pallet 72 remains in its rest position shown in FIG. 3, against the end of travel stop 76.
- the overload currents will therefore be taken into account exclusively by the protection located downstream of the transformer tank.
- the tension of the spring 78 thus allows ensure the amperometric selectivity of the installation.
- the hook 90 of the rod then drives the transmission shaft 88 in rotation in clockwise in Figure 2. However, this movement is slowed down by the presence of the corresponding plate 94 which, having to overcome the resistance generated by the oil which it displaces, opposes the movement of the rod 84.
- the deflection arm 102 drives the latch 62 counterclockwise of a watch.
- the shape of the pallet 72 is such that the distance separating the pallet from the walls of the fixed magnetic circuit decreases rapidly when the pallet is rotated in the direction counterclockwise. Consequently, the reluctance of the magnetic circuit overall including pallet 72 decreases rapidly and, for a short-circuit current of given intensity, the electromagnetic forces exerted on the pallet increase.
- the moment of electromagnetic forces relative to the axis of rotation 74 of the pallet also increases, although less rapidly, due to the decrease in the lever arm corresponding due to rotation. Overall, this rapid increase in the timing of electromagnetic forces ensures, at constant short-circuit intensity, an acceleration continues to rotate the paddle 72.
- the paddle 72 therefore continues its movement and drives with it the entire kinematic chain 50 constituted by the rod 84, the transmission shaft 88 and the deflection arm 102.
- the deflection arm 102 brings the locking bolt trigger 62 in a trigger position.
- the latch 62 releases the circuit breaker mechanism 28 which drives the shaft switching 54 and contacts 58 in a separated position, cutting off the supply of the primary circuit 16 of the transformer.
- a secondary protection device such as a circuit breaker with fuse or a circuit breaker, located downstream of the transformer tank on the secondary line where the fault appeared, opens the circuit quickly enough, the intensity of the current in conductor 34 and the induction flux it induces in the air gap of the circuit fixed magnetic 70 decrease before the rotation of the shaft has caused the tripping of the circuit breaker.
- the moving moving masses are weak and relatively negligible compared to the efforts of return springs 78, 104 and resistant efforts of the plates 94, so that the general movement of the chain kinematic 50 in the direction of release stops almost instantaneously. Pallet 72 and the shaft 88 then return to their rest position under the joint stress of their respective return springs 78, 104.
- the plates 94 are dimensioned so as to ensure a time delay sufficient for shutdown to take place downstream of the transformer every whenever possible.
- the plates therefore ensure chronometric selectivity to very low cost.
- the objective is not to cause the tripping of the circuit breaker on secondary fault only when this occurs between the tank and the protective means located downstream of the tank, i.e. when the fault cannot be detected or eliminated at the level of protection means located downstream of the tank.
- the duration of the trigger delay must be essentially identical in the case where the short circuit occurs between a phase and neutral, in the case of a short circuit between two phases and in the case of a short circuit phase. This is the reason why it is preferable to provide each phase of a friction plate 94, rather than having a single plate at the level of the tree.
- the timer function can be obtained by any means mechanical, in particular by any device dissipating energy by fluid friction or solid.
- the time delay can also be obtained by a dead stroke of one of the elements of the transmission chain, preferably independently for each palette.
- An example of this variant has been shown in the embodiment of the FIG. 5, where the elements identical to the first embodiment have been identified with identical references.
- the embodiment of Figure 5 does not differ from the first mode of realization that by the fact that the end of the rod 184 carrying the hook was extended, so that the hook 190 does not start to drive the tree until after covered a certain distance in the slot 92.
- the pallet 72 first covers a certain dead travel 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 start to drive the shaft 88.
- the pallet is not necessarily a pivoting part. It can be for example replaced by a moving part in translation.
- the multifunction tree 88 of the embodiment can be replaced by several parts, for example: a part providing the logical "OR" function between movements different relays, another part ensuring the mechanical transmission of this movement remotely, up to the release 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)
Abstract
Description
- une cuve contenant un diélectrique liquide ou gazeux,
- un circuit électrique primaire triphasé comportant des enroulements primaires immergés dans le diélectrique,
- des traversées électriques primaires permettant de relier le circuit électrique primaire à un réseau électrique primaire extérieur à la cuve,
- un circuit électrique secondaire triphasé comportant des enroulements secondaires immergés dans le diélectrique,
- des traversées électriques secondaires permettant de relier le circuit électrique secondaire à un réseau électrique secondaire extérieur à la cuve,
- un dispositif de protection comportant
- un disjoncteur disposé dans la cuve, dans le circuit électrique primaire, entre les traversées primaires et les enroulements primaires, le disjoncteur comportant un verrou de déclenchement mobile entre une position de verrouillage et une position de déclenchement,
- des moyens de déclenchement du disjoncteur, comportant un dispositif déclencheur à maximum de courant,
- pour chaque phase du circuit secondaire du transformateur, un relais électromécanique, comportant
- une palette mobile entre une position de repos et une position d'ordre de déclenchement,
- un circuit magnétique fixe pour appliquer à la palette une force électromagnétique motrice croissant avec l'intensité du courant traversant 1a phase du circuit secondaire du transformateur,
- un moyen de rappel élastique de la palette vers la position de repos, appliquant à la palette en position de repos une force de rappel seuil,
- une chaíne cinématique de transmission disposée entre les relais électromécaniques et le verrou de déclenchement du disjoncteur, comportant un organe de sortie entraínant le verrou de déclenchement du disjoncteur de sa position de verrouillage à sa position de déclenchement lorsque la palette du relais électromécanique de l'une quelconque des phases secondaires se déplace de la position de repos à la position d'ordre de déclenchement.
- la figure 1 représente un schéma électrique d'un transformateur selon un premier mode de réalisation de l'invention ;
- la figure 2 représente une vue en perspective d'un dispositif de protection situé à l'intérieur d'une cuve du transformateur selon le mode de réalisation de la figure 1 ;
- la figure 3 représente une vue de dessous du dispositif de la figure 2 ;
- la figure 4 représente une vue de côté du dispositif de la figure 2 ;
- la figure 5 représente une variante selon un deuxième mode de réalisation de l'invention, dans une vue de côté comparable à la figure 4.
Claims (10)
- Transformateur électrique de distribution comportantune cuve (12) contenant un diélectrique liquide ou gazeux (14),un circuit électrique primaire triphasé (16) comportant des enroulements primaires (24) immergés dans le diélectrique (14),des traversées électriques primaires (20) permettant de relier le circuit électrique primaire à un réseau électrique primaire extérieur à la cuve,un circuit électrique secondaire triphasé (18) comportant des enroulements secondaires (30) immergés dans le diélectrique (14),des traversées électriques secondaires (32) permettant de relier le circuit électrique secondaire (18) à un réseau électrique secondaire extérieur à la cuve (12),un dispositif de protection comportantun disjoncteur (28) disposé dans la cuve, dans le circuit électrique primaire (16), entre les traversées primaires (20) et les enroulements primaires (24), le disjoncteur (28) comportant un verrou de déclenchement (62) mobile entre une position de verrouillage et une position de déclenchement,des moyens de déclenchement (40) du disjoncteur, comportant un dispositif déclencheur à maximum de courant,pour chaque phase (34) du circuit secondaire (18) du transformateur, un relais électromécanique (42), comportant:une palette (72) mobile entre une position de repos et une position d'ordre de déclenchement,un circuit magnétique fixe (70) pour appliquer à la palette (72) une force électromagnétique motrice croissant avec l'intensité du courant traversant la phase du circuit secondaire du transformateur,un moyen de rappel élastique (78) de la palette (72) vers la position de repos, appliquant à la palette (72) en position de repos une force de rappel seuil,une chaíne cinématique de transmission (50) disposée entre les relais électromécaniques (42) et le verrou de déclenchement (62) du disjoncteur, comportant un organe de sortie (102) entraínant le verrou de déclenchement du disjoncteur de sa position de verrouillage à sa position de déclenchement lorsque la palette (72) du relais électromécanique (42) de l'une quelconque des phases secondaires (34) se déplace de la position de repos à la position d'ordre de déclenchement.
- Transformateur selon la revendication 1, caractérisé en ce que le dispositif déclencheur à maximum de courant comporte en outre, pour chaque palette, un dispositif temporisateur (94), introduisant un retard entre la mise en mouvement de la palette et l'arrivée du verrou de déclenchement dans la position de déclenchement.
- Transformateur selon la revendication 2, caractérisé en ce que le dispositif temporisateur de chaque palette comporte un élément dissipant de l'énergie par frottement, et appliquant à la palette un effort résistant d'autant plus important que la palette a une énergie cinétique importante.
- Transformateur selon la revendication 3, caractérisé en ce que le diélectrique (14) est un liquide visqueux, le dispositif temporisateur comportant au moins un frein (94) plongé dans ledit diélectrique visqueux.
- Transformateur selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le dispositif temporisateur de chaque palette comporte une liaison à course morte telle que la palette n'entraíne pas l'organe de sortie (102) tant que la palette n'a pas couvert une course morte entre la position de repos et la position d'ordre de déclenchement.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la chaíne cinématique de transmission (50) comporte un arbre de transmission (88) et, pour chaque phase secondaire (34), un moyen d'accouplement unidirectionnel (90,92) entre la palette (72) et l'arbre de transmission (88), apte à transmettre à l'arbre de transmission (88) la force électromagnétique motrice appliquée par le circuit magnétique fixe (70) à la palette (72).
- Transformateur selon la revendication 6, caractérisé en ce que l'arbre de transmission (88) est pourvu d'un ressort de rappel (104) vers une position de repos.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour chaque phase secondaire (34), le circuit magnétique fixe (70) comporte une pièce en matériau ferromagnétique présentant un entrefer, la palette (72) étant également en un matériau ferromagnétique et disposée dans l'entrefer de manière à former avec la pièce en matériau ferromagnétique un circuit magnétique à réluctance variable ayant une réluctance qui diminue lorsque la palette passe de la position de repos à la position d'ordre de déclenchement.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de déclenchement du disjoncteur comportent en outre un transducteur sensible à la température (46) et/ou à la pression (48) du fluide diélectrique dans la cuve, et passant d'une position désactivée à une position activée lorsque la température du fluide dépasse un seuil de température donné et/ou que la pression du fluide passe un seuil de pression donné, la chaíne cinématique de transmission (50) étant disposée de telle manière que lorsque le transducteur (46, 48) passe de sa position désactivée à sa position activée, la chaíne cinématique de transmission (50) entraíne le verrou (62) vers sa position de déclenchement.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de protection comporte en outre, pour chaque phase primaire, disposés dans la cuve, dans le circuit électrique primaire en série entre les traversées primaires et le disjoncteur, des fusibles ayant un pouvoir de coupure suffisant pour assurer la coupure de la phase correspondante en cas de court-circuit du circuit primaire.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0107821A FR2826173B1 (fr) | 2001-06-15 | 2001-06-15 | Transformateur de distribution auto-protege par un disjoncteur declenchant sur court-circuit secondaire |
FR0107821 | 2001-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1267368A1 true EP1267368A1 (fr) | 2002-12-18 |
EP1267368B1 EP1267368B1 (fr) | 2008-08-06 |
Family
ID=8864330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020354044 Expired - Lifetime EP1267368B1 (fr) | 2001-06-15 | 2002-03-14 | Transformateur de distribution auto-protégé par un disjoncteur déclenchant sur court-circuit secondaire |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1267368B1 (fr) |
CN (1) | CN1260747C (fr) |
BR (1) | BRPI0202260B1 (fr) |
DE (1) | DE60228022D1 (fr) |
ES (1) | ES2309139T3 (fr) |
FR (1) | FR2826173B1 (fr) |
NO (1) | NO321891B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2075807A1 (fr) | 2007-12-28 | 2009-07-01 | Constructora de Transformadores de Distribucion Cotradis, S.L.U. | Équipement électrique pour réseau de distribution avec système de détection de panne, de déconnexion et d'élimination |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2653875B1 (fr) * | 2012-04-20 | 2014-09-10 | ABB Technology AG | Transducteur de courant du type Rogowski et agencement pour mesurer un courant |
WO2016004999A1 (fr) * | 2014-07-10 | 2016-01-14 | Abb Technology Ag | Dispositif électrique comprenant un appareil à isolation gazeuse, en particulier un transformateur ou un réacteur à isolation gazeuse |
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 |
Citations (3)
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 |
FR2293095A1 (fr) * | 1974-11-28 | 1976-06-25 | Birkowski Felix | Dispositif de securite pour les transformateurs de dispersion contre les effets de surcharge et les courts-circuits dans les reseaux secondaires |
EP0981140A1 (fr) * | 1998-08-14 | 2000-02-23 | Schneider Electric Industries SA | Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles |
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2001
- 2001-06-15 FR FR0107821A patent/FR2826173B1/fr not_active Expired - Fee Related
-
2002
- 2002-03-14 EP EP20020354044 patent/EP1267368B1/fr not_active Expired - Lifetime
- 2002-03-14 DE DE60228022T patent/DE60228022D1/de not_active Expired - Lifetime
- 2002-03-14 ES ES02354044T patent/ES2309139T3/es not_active Expired - Lifetime
- 2002-06-13 CN CN 02122795 patent/CN1260747C/zh not_active Expired - Fee Related
- 2002-06-13 NO NO20022829A patent/NO321891B1/no unknown
- 2002-06-14 BR BRPI0202260A patent/BRPI0202260B1/pt active IP Right Grant
Patent Citations (3)
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 |
FR2293095A1 (fr) * | 1974-11-28 | 1976-06-25 | Birkowski Felix | Dispositif de securite pour les transformateurs de dispersion contre les effets de surcharge et les courts-circuits dans les reseaux secondaires |
EP0981140A1 (fr) * | 1998-08-14 | 2000-02-23 | Schneider Electric Industries SA | Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2075807A1 (fr) | 2007-12-28 | 2009-07-01 | Constructora de Transformadores de Distribucion Cotradis, S.L.U. | Équipement électrique pour réseau de distribution avec système de détection de panne, de déconnexion et d'élimination |
Also Published As
Publication number | Publication date |
---|---|
BRPI0202260B1 (pt) | 2016-09-27 |
CN1392577A (zh) | 2003-01-22 |
CN1260747C (zh) | 2006-06-21 |
DE60228022D1 (de) | 2008-09-18 |
NO321891B1 (no) | 2006-07-17 |
BR0202260A (pt) | 2003-04-01 |
EP1267368B1 (fr) | 2008-08-06 |
FR2826173A1 (fr) | 2002-12-20 |
NO20022829L (no) | 2002-12-16 |
NO20022829D0 (no) | 2002-06-13 |
FR2826173B1 (fr) | 2003-08-15 |
ES2309139T3 (es) | 2008-12-16 |
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