EP0981140A1 - Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles - Google Patents
Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles Download PDFInfo
- Publication number
- EP0981140A1 EP0981140A1 EP99410089A EP99410089A EP0981140A1 EP 0981140 A1 EP0981140 A1 EP 0981140A1 EP 99410089 A EP99410089 A EP 99410089A EP 99410089 A EP99410089 A EP 99410089A EP 0981140 A1 EP0981140 A1 EP 0981140A1
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- EP
- European Patent Office
- Prior art keywords
- fuse
- circuit breaker
- circuit
- phase
- transformer
- 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.)
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Classifications
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- 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
- H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/0241—Structural association of a fuse and another component or apparatus
- H01H2085/0291—Structural association with a current transformer
Definitions
- the invention relates to an electrical transformer whose windings and circuit magnetic are immersed in a liquid or a dielectric gas contained in a tank, and which has an integrated protection device, designed to limit the effects of internal transformer failure.
- Document FR-A-2 712 730 describes a three-phase transformer of this type immersed in an oil tank, the protection device of which comprises at least one fuse per phase protection arranged between each power supply phase and the windings primary transformer, and a three-phase breaker disposed between the fuses and the corresponding transformer phases.
- the breaker is opened by a trigger, in response to a signal from a sensor sensitive to variations of at least one parameter representative of the characteristics of the dielectric liquid.
- the measured parameter is dielectric pressure, which can be an index of local internal faults in transformer circuits - for example a point fault in the electrical insulation of a winding, likely to degenerate into a hot spot - only manifested by a very low overcurrent of the primary supply current.
- the fuses are intended for compensate for collapses of the transformer internal impedance, inducing a fall ohmic important.
- at least two fuses are connected in series on each phase, with stepped cut-off thresholds: one of the fuses has a very short time constant and sensitive to very large currents exceeding six times the nominal current of the transformer; the other is sensitive to overloads corresponding to three to five times the nominal intensity, with a higher time constant. All is designed so that, if it intervenes to interrupt the supply of the windings transformer primary, it is not possible to restore this supply without special intervention to disassemble the tank by a specialist. This is the reason which the breaker is not resettable and submerged in the tank, as well as the fuses.
- any triggering of the protective device necessarily corresponds to an internal transformer fault, and in no case to a external incident. Indeed, it would be completely inadmissible to impose an intervention on a healthy transformer, due to an external fault, especially on the downstream installation. It is necessary therefore necessarily that means are provided ensuring selectivity with respect to electrical faults outside the transformer. Experience shows that it subsists in carries a risk of unwanted melting of the fuses of the protection device, and in particular fuses working in the field of low overcurrents.
- low-current fuses submerged of the protective device may give rise to unacceptable heating for their immediate environment, without however melting and interrupting the current. We can then generate serious failures that go against the objective sought with the implementation place of the fuse. In addition, the heating of the fuses causes their aging. premature, and therefore an increasing risk of dysfunction over time.
- Document EP-A-0 468 299 also describes a three-phase transformer immersed in oil, to which is associated, for each primary phase, a protection device comprising, connected in series with the windings of the primary phase concerned, a single-phase circuit breaker controlled by an overcurrent release sensitive to current flowing through the circuit breaker, and a fuse whose intensity of nominal current is at minus 5 times greater than the intensity of the nominal phase current of the transformer, and preferably 10 or 20 times greater.
- a protection device comprising, connected in series with the windings of the primary phase concerned, a single-phase circuit breaker controlled by an overcurrent release sensitive to current flowing through the circuit breaker, and a fuse whose intensity of nominal current is at minus 5 times greater than the intensity of the nominal phase current of the transformer, and preferably 10 or 20 times greater.
- this device is located outside the transformer. There follows one significant space and complexity of assembly on site. In particular, a distance significant bypass in air must be preserved between the upstream connections and downstream of the circuit breaker, due to the very high currents likely to pass through during a primary short circuit. The large number of connections outside the tank transformer and whose isolation is difficult to control, induces an additional risk of failure.
- the device is not active vis-à-vis short circuits upstream of the fuse, especially those generated by the electrical connection between the circuit breaker and the fuse.
- the fuse is connected in series between the circuit breaker and the transformer and the current sensor controlling the tripping of the circuit breaker is downstream of the fuse.
- the fault current in the event of a short circuit between the circuit breaker and the fuse crosses the circuit breaker with an intensity which exceeds its breaking capacity, if although the circuit breaker is unable to break the circuit.
- the defect then leads an outage at an upstream node of the network, to the detriment of overall availability.
- the device does not provide for the simultaneous tripping of the three circuit breakers each associated with a primary phase of the transformer. Therefore, we can assist in certain conditions to a partial trip due to a fault, leaving in a phase not open a leakage current which remains lower than the tripping current of the circuit breaker or which induces a significant delay in cutting, with all the harmful consequences for the primary circuit (risk of explosion) and / or for the entire installation (not selectivity with respect to the source station).
- Document US-A-4 323 871 describes an electrical circuit protection apparatus, not specifically dedicated to the protection of a transformer, and comprising a circuit breaker and fuses, all submerged in a tank filled with oil.
- the circuit breaker is intended for cut the low fault currents while the fuses are intended to cut the current significant faults.
- the circuit breaker includes, in its single-phase version, a bulb conventional vacuum with a fixed contact member and a movable contact member in translation in the cylindrical body of the bulb.
- the mobile contact member comprises a rod kinematically connected to an opening and closing mechanism with a spring opening hours. This mechanism includes an operating lever allowing the opening and manual closing through the tank. It also has an opening lock in form of cam which is resiliently biased towards a rest position.
- a device for U-shaped bimetal release cooperates with the cam and retains it in an active position where it blocks the mechanism in the closed position.
- the bimetallic strip is traversed by the current passing through the bulb In the event of a fault current, it curves and releases the cam, which in turn releases an opening pawl acting on the opening spring and causing opening the mechanism.
- a three-phase circuit breaker is derived from the previous one by juxtaposition three single-phase circuit breakers.
- Single-phase opening and closing mechanisms are mechanically connected to each other, on the one hand at the level of the opening pawls, and on the other hand at the level of the operating levers, so as to form a unique mechanism allowing the simultaneous or almost simultaneous opening and closing of the three poles of the circuit breaker, both on electrical fault and on manual control.
- the bimetallic strip of each phase is connected in series between the bushing and the vacuum interrupter phase and is traversed by the phase current. It therefore introduces by its presence an additional risk of electrical fault, especially since it constitutes a conductor mobile and unprotected directly immersed in oil.
- the bimetallic strip is placed, to constructive reasons, directly upstream or downstream of the circuit breaker that it ordered. It cannot therefore take into account short circuits at the level of bushings, or between the bushing and the circuit breaker.
- the invention therefore aims to overcome the drawbacks of the state of the art and in particular to realize, at low cost and in the volume of a submerged transformer tank conventional, integrated protection of great safety, which is active for weak overcurrents while avoiding the untimely risks of fusion encountered in the fuse devices.
- the invention aims to propose, at low cost and in a reduced volume, a transformer with integrated protection device for safe operation, which is suitable for deal with both internal and secondary terminal faults.
- dependability requirement of a system means that account must be taken simultaneously: system security, ie its ability to avoid an event catastrophic; its reliability, i.e. its probability of not failing over a period of time given; its availability, i.e. its probability of operating at a given time, which itself depends on the reliability and maintainability of the system, which is its probability to be repaired in a given time interval.
- the security requirement implies that all internal faults of the transformer which are likely to cause the explosion of the tank, cause the transformer to switch off.
- Availability and maintainability mean good selectivity in the treatment of faults internal requiring a major intervention on the transformer and the treatment of faults on the secondary circuit outside the transformer for which interventions should be kept to a minimum.
- circuit breaker poles and fuses Due to the immersion of the circuit breaker poles and fuses in the circuit breaker tank, it is possible to offer a factory-mounted assembly, for which installation on site is reduced, which significantly reduces the risk of failure caused by the device protection.
- the arrangement of the fuses upstream of the circuit breaker makes it possible to process the risk of electrical faults induced by the presence of the circuit breaker.
- the immersion of the opening mechanism offers corrosion protection and lubrication which are favorable from the point of view of aging. Overall reliability is increased.
- the overcurrent triggering device comprises at least one measuring means for measuring the intensity of the current flowing in a phase of the circuit transformer primary.
- the sensor is a current transformer.
- a such an arrangement ensures that a short circuit in the tank between a phase and the earth in one point between the fuse and the corresponding pole of the circuit breaker, which gives rise to melting of this fuse, or seen by the tripping means so as to ensure separation total of the transformer.
- a particularly advantageous choice is to have a current transformer toroid on the part of the bushing external to the tank, or immediate proximity to it.
- the fuse (s) have an elongated shape with two conductive ends intended for their upstream connection on the side of the crossing and downstream on the side of the circuit breaker, located on either side of a middle part whose surface external is isolated, and in that, for each phase fitted with a fuse, the parts conductive located between the insulating bushing and the external surface isolated from the part the middle of the fuse are surrounded by solid insulation.
- the electrical junction between the bushing and the fuse is the only point of the installation not protected by the association fuse and circuit breaker. It is therefore a vulnerable point in terms of security of the installation.
- the solid insulation therefore offers a good guarantee that there are no faults.
- the fuse (s) have an elongated shape with two conductive ends intended for their upstream connection on the side of the crossing and downstream on the side of the circuit breaker, located on either side of a middle part whose surface external consists of an insulator, and in that for each phase fitted with a fuse, the fuse constitutes with the bushing a one-piece sub-assembly and in that the surface outside of this sub-assembly, in its part internal to the tank, comprising the bushing, the upstream conductive end and the middle part of the fuse, consists of one or several solid insulators forming solid insulation without interruption.
- the triggering means further comprise a commanding triggering device opening of the circuit breaker when at least one parameter representative of the state of said circuit dielectric exceeds a determined threshold.
- a commanding triggering device opening of the circuit breaker when at least one parameter representative of the state of said circuit dielectric exceeds a determined threshold.
- different physical parameters of the state of the dielectric are accessible: the pressure of the liquid, its temperature, the level of the liquid in the tank, but also the presence of gas in the tank which allows among other things to detect a gas decomposition of the dielectric or of a solid insulator, for example by a low power arc between turns on one of the transformer windings.
- the overcurrent trip device includes at least one measuring means for measuring the intensity of the current flowing in a phase of the secondary circuit of the transformer. Due to the potential saturation of the circuit the transformer, it is not always satisfactory to take the information from tripping of the circuit breaker on the primary circuit. In practice it is possible to equip one or more branches of the secondary circuit, preferably each of the phases and the case if necessary the neutral, of a current sensor. According to one embodiment, the two means current measurement devices are additionally combined in a differential protection device of the transformer. A device of this type is described for example in the document FR-A-2 14 771 integrated on this point here by reference.
- the fuse (s), the circuit breaker and the tripping means are associated in such a way that if the fuse or one of the fuses blows, the means of tripping give an order to separate the contacts.
- There is an area of values of the current intensity - namely: the values exceeding the intensity threshold value beyond of which the blowing of the fuse is completed before an order of separation of the organs of contact given by the tripping means could have caused the separation of the contacts - for which the separation of the contacts of the poles of the circuit breaker is after the fusion at least one of the fuses.
- the fuse or fuses are limiting. This ensures that the current flowing in the primary circuit during blown fuses remains at an acceptable level.
- each pole of the circuit breaker comprises a light bulb. vacuum immersed in the dielectric. Due to the presence of fuses ensuring protection in case of high short-circuit current, it is possible to use vacuum bulbs of low performance, very space-saving.
- the short distance from bypass of the vacuum interrupter i.e. the short distance between the connections upstream and downstream of the bulb, does not cause any additional problem, since the connections are immersed in oil which provides good electrical insulation.
- the light bulb vacuum therefore offers a very favorable compromise in terms of space, performance and cost.
- the circuit breaker includes a closing mechanism capable of passing the contact members from their separate position to their contact position, comprising a member accessible from the outside of the tank, the opening mechanism being able to cause the opening of the pole (s) of the circuit breaker regardless of the state of the closing. It is then possible, in the case where the triggering has an origin external to the transformer, to put it back into service without opening the tank. Priority to the opening avoids any deterioration of the transformer in the event of maintenance of the fault at the time of closing.
- a three-phase low-voltage medium voltage transformer 1 has primary 2 and secondary 3 windings immersed in a tank 4 containing a dielectric liquid 5, in practice oil. Each phase of the circuit primary of the transformer enters the tank 4 via a part multifunction 6 comprising a medium voltage crossing 7.
- the multifunctional part 6 has, in its part external to the tank 4, a zone specific racking-in 8 and in its internal part to the tank a plug-in area 9 of a head 10 of a fuse 11.
- Fuse 11 is a conventional limiting fuse, with a part median forming a body 12 whose outer wall is cylindrical and insulating, and two ends - head 10 and foot 13 - made of metal.
- the insertion zone 9 has a wall tubular outer of electrically insulating elastomeric material, the lower end of which cooperates with the body 12 of the fuse 11 so as to seal between the head 10 of the fuse and oil 5. The upper end of this tubular wall seals with the racking-in area 8.
- the multifunctional part 6 therefore constitutes, with the fuse 11 assembled, a monobloc assembly whose external walls form a solid insulation without interruption between the bushing 7 and the middle part 12 of the fuse 11. This ensures that any electrical fault upstream of the fuse 11 is in fact external to the tank 4, and does not generate therefore no risk of explosion.
- the other end of the fuse 11 is connected to a connection side on the source side 14 of a circuit breaker module 15, via an electrical connection 16 comprising a sheathed electrical conductor.
- the circuit breaker module 15 comprises, for each phase, a vacuum bulb 17 of structure conventional, with a body 18 forming a cylindrical chamber containing a fixed contact 19 and a movable contact member 20 guided axially in the bulb and extended by a control rod 21.
- a bulb of this type is described for example in document US-A-4 323 871, the description of which is incorporated here on this point by reference.
- An opening and closing mechanism 22 of this circuit breaker is also type described in document US-A-4 323 871, the description of which is incorporated here by reference.
- This mechanism 22 is provided with an operating lever 23 accessible from the exterior of the tank 4, which allows manual opening and closing.
- the load-side connection area 24 of the circuit breaker module 15 is connected to the windings primary 2 of transformer 1 via a tap changer 25.
- the changer is of the type described for example in document US-A4 504 811, the description of which is incorporated on this point here by reference. It has a fixed connection bar ensuring departures to different points of the primary windings, and a movable bar carrying the connection points to the downstream areas of the circuit breaker. The displacement of the bar mobile allows, simultaneously for each phase of the primary, the connection of the beach load side of the circuit breaker selectively at one of the starting points towards the winding corresponding primary.
- the tank 4 is waterproof or almost waterproof (the latter term covering the case of tanks including, for example, a small air drying pipe) and the level of oil is such as the insertion zone 9, the fuses 11 and the vacuum bulbs 17, likewise that the moving parts of the mechanism 22 of the circuit breaker 15, other than the lever maneuver 23, are immersed.
- a toroid 26 of measuring transformer 27 giving a measurement of the current intensity circulating in the crossing.
- An overcurrent release device 28 receives the signal and controls the opening and closing mechanism 22 of the module circuit breaker 15.
- the current time diagram in Figure 4 shows the behavior of the device. Have been plotted on this diagram: on the ordinate the time and on the abscissa the intensity phase current.
- the circuit breaker admits an overload I S without tripping.
- the tripping curve 40 of the circuit breaker bends beyond I S so that at a threshold value I CCBT corresponding to the intensity of the current flowing in a phase of the primary during a three-phase short circuit at secondary of the transformer, the circuit breaker has a short tripping time, in this example 0.1 seconds.
- the fuse blowing curve 41 is, in this zone, well above the circuit breaker breaking curve, since the blowing would only take place after 3 seconds of exposure to the current. In practice this results in the fact that in the event of a short circuit in the transformer secondary, the circuit breaker controlled by its overcurrent relay cuts the current in the transformer primary before the fuses have time to s 'warm up considerably.
- circuit breaker trip modes are provided.
- a or several sensors 29 of data representative of the state of the dielectric connected to a tripping device 30.
- these data include for example measurements of the liquid level, its temperature, its pressure, or the presence of a gas in the tank.
- a sub-assembly one-piece multifunction 50 includes a medium-voltage connection piece 51, a flexible electrical connection 52, a bushing 53 and a plug-in part 54 of the head fuse.
- the flexible link 52 comprises a core 55 comprising a metal braid or a thin cable.
- the sub-assembly has an outer covering 56 molded from material insulating elastomer.
- a flange 57 allows attachment to the tank 4. This gives a electrical insulation without interruption between the middle part of the fuse 11 and the connection medium voltage 51 outside the tank.
- This device has the additional advantage by compared to the previous to eliminate a connection piece with the average switchgear source side voltage.
- a fourth embodiment, illustrated in FIG. 7, differs from the first mode essentially by the structure of the bushing and the upstream connection of the fuse each phase.
- the bushing is connected to the head connection of the limiting fuse 8, by through an electrical connection 58 consisting of a sheathed conductor. This provision, less efficient, is however also less expensive since it reduces the number of specific pieces.
- the above examples of achievements were taken in the field of transformers medium voltage low voltage.
- the invention is however also applicable to other types of transformers, especially to medium voltage source transformers.
- the transformer primary connection can be either triangle or star. In the latter case, it may be useful to have on the neutral crossing a current sensor capable of driving the device with overcurrent.
- circuit breaker it is possible to envisage other types of circuit breaker than circuit breakers with empty.
- the invention also finds application with a gaseous dielectric, in particular of SF6.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- Fuses (AREA)
- Regulation Of General Use Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
- une cuve contenant un diélectrique liquide ou gazeux,
- un circuit primaire triphasé et un circuit secondaire triphasé, comportant chacun des enroulements immergés dans le diélectrique, chaque phase du circuit primaire pénétrant dans la cuve par une traversée isolante,
- un dispositif de protection comportant :
- au moins deux fusibles immergés dans le diélectrique, les fusibles étant branchés en série chacun sur une phase du circuit primaire du transformateur entre la traversée isolante et les enroulements du circuit primaire et ayant un pouvoir de coupure suffisant pour assurer la coupure de la phase correspondante en cas de court-circuit triphasé du circuit primaire,
- un disjoncteur multipolaire comportant, pour chaque phase munie d'un des fusibles, un pôle immergé dans le diélectrique et connecté en série sur ladite phase entre le fusible correspondant et les enroulements, chaque pôle comportant des organes de contact aptes à prendre l'un par rapport à l'autre une position de contact dans laquelle ils assurent le passage du courant et une position de séparation, le disjoncteur comportant en outre un mécanisme d'ouverture commun à l'ensemble des pôles, apte à faire passer les organes de contacts de leur position de contact à leur position de séparation,
- des moyens de déclenchement associés au mécanisme d'ouverture du disjoncteur et comportant un dispositif déclencheur à maximum de courant,
- une cuve contenant un diélectrique liquide ou gazeux
- un circuit primaire et un circuit secondaire, comportant chacun un ou plusieurs enroulements immergés dans le diélectrique, la phase du circuit primaire pénétrant dans la cuve par une traversée isolante,
- un dispositif de protection comportant :
- au moins un fusible immergé dans le diélectrique, branché en série sur la phase du circuit primaire du transformateur entre la traversée isolante et le ou les enroulements du circuit primaire et ayant un pouvoir de coupure suffisant pour assurer la coupure de la phase correspondante en cas de court-circuit du circuit primaire,
- un disjoncteur comportant un pôle immergé dans le diélectrique, connecté en série entre le fusible et les enroulements, et comportant des organes de contact aptes à prendre l'un par rapport à l'autre une position de contact dans laquelle ils assurent le passage du courant et une position de séparation, le disjoncteur comportant en outre un mécanisme d'ouverture apte à faire passer les organes de contacts de leur position de contact à leur position de séparation,
- des moyens de déclenchement associés au mécanisme d'ouverture du disjoncteur et comportant un dispositif déclencheur à maximum de courant,
- la figure 1 représente un schéma électrique d'un transformateur selon un premier mode de réalisation de l'invention ;
- la figure 2 représente une coupe d'un agencement correspondant au premier mode de réalisation de l'invention ;
- la figure 3 représente une coupe dans un plan perpendiculaire au plan de la figure 1 ;
- la figure 4 représente un diagramme où sont portées les caractéristiques temps courant du disjoncteur et des fusibles du transformateur ;
- la figure 5 représente schématiquement les éléments d'un transformateur selon un deuxième mode de réalisation de l'invention ;
- la figure 6 représente un schéma électrique d'un troisième mode de réalisation de l'invention ;
- la figure 7 représente schématiquement les éléments d'un transformateur selon un quatrième mode de réalisation de l'invention.
Claims (12)
- Transformateur électrique triphasé (1) comportant :une cuve (4) contenant un diélectrique liquide ou gazeux (5),un circuit primaire triphasé et un circuit secondaire triphasé, comportant chacun des enroulements (2,3) immergés dans le diélectrique, chaque phase du circuit primaire pénétrant dans la cuve (4) par une traversée isolante (7),un dispositif de protection comportant :au moins deux fusibles (11) immergés dans le diélectrique (5), les fusibles étant branchés en série chacun sur une phase du circuit primaire du transformateur (1) entre la traversée isolante (7) et les enroulements (2) du circuit primaire et ayant un pouvoir de coupure suffisant pour assurer la coupure de la phase correspondante en cas de court-circuit triphasé du circuit primaire,un disjoncteur multipolaire (15) comportant, pour chaque phase munie d'un des fusibles (11), un pôle immergé dans le diélectrique (5) et connecté en série sur ladite phase entre le fusible (11) correspondant et les enroulements (2), chaque pôle comportant des organes de contact (19, 20) aptes à prendre l'un par rapport à l'autre une position de contact dans laquelle ils assurent le passage du courant et une position de séparation, le disjoncteur (15) comportant en outre un mécanisme d'ouverture (22) commun à l'ensemble des pôles, apte à faire passer les organes de contacts (19, 20) de leur position de contact à leur position de séparation,des moyens de déclenchement (28, 30) associés au mécanisme d'ouverture (22) du disjoncteur (15) et comportant un dispositif déclencheur à maximum de courant (28),
- Transformateur électrique monophasé (1) comportant :une cuve (4) contenant un diélectrique liquide ou gazeux (5) ;un circuit primaire et un circuit secondaire, comportant chacun un ou plusieurs enroulements (2, 3) immergés dans le diélectrique (5), la phase du circuit primaire pénétrant dans la cuve (4) par une traversée isolante (7),un dispositif de protection comportant :au moins un fusible (11) immergé dans le diélectrique (5), branché en série sur la phase du circuit primaire du transformateur (1) entre la traversée isolante (7) et le ou les enroulements du circuit primaire (2) et ayant un pouvoir de coupure suffisant pour assurer la coupure de la phase correspondante en cas de court-circuit du circuit primaire,un disjoncteur (15) comportant un pôle immergé dans le diélectrique (5), connecté en série entre le fusible (11) et les enroulements du circuit primaire (2), et comportant des organes de contact (19, 20) aptes à prendre l'un par rapport à l'autre une position de contact dans laquelle ils assurent le passage du courant et une position de séparation, le disjoncteur (15) comportant en outre un mécanisme d'ouverture (22) apte à faire passer les organes de contact (19, 20) de leur position de contact à leur position de séparation,des moyens de déclenchement (28, 30) associés au mécanisme d'ouverture (22) du disjoncteur (15) et comportant un dispositif déclencheur à maximum de courant (28),
- Transformateur selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le dispositif déclencheur à maximum de courant (28) comprend au moins un moyen de mesure (27) pour mesurer l'intensité du courant circulant dans une phase du circuit primaire du transformateur (1).
- Transformateur selon la revendication 3, caractérisé en ce que le moyen de mesure (27) mesure le courant circulant en un point situé en amont du ou des fusibles (11), en particulier hors de la cuve (4), en amont de la traversée (7).
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou les fusibles (11) ont une forme allongée avec deux extrémités conductrices (10, 13) destinées à leur connexion amont du côté de la traversée (7) et aval du côté du disjoncteur (15), situées de part et d'autre d'une partie médiane (12) dont la surface externe est isolée, et en ce que, pour chaque phase munie d'un fusible (11), les parties conductrices situées entre la traversée isolante (7) et la surface externe isolée de la partie médiane (12) du fusible sont enveloppées par un isolant solide.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou les fusibles (11) ont une forme allongée avec deux extrémités conductrices (10, 13) destinées à leur connexion amont du côté de la traversée (7) et aval du côté du disjoncteur (15), situées de part et d'autre d'une partie médiane (12) dont la surface externe est constituée d'un isolant, et en ce que pour chaque phase munie d'un fusible (11), le fusible (11) constitue avec la traversée (7) un sous-ensemble monobloc et en ce que la surface extérieure de ce sous-ensemble, dans sa partie interne à la cuve (4), comprenant la traversée (7), l'extrémité conductrice amont (10) et la partie médiane (12) du fusible (11), est constituée d'un ou plusieurs isolants solides formant une isolation solide sans interruption.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de déclenchement (28, 30) comportent en outre un dispositif déclencheur (30) commandant l'ouverture du disjoncteur lorsqu'au moins un paramètre représentatif de l'état dudit diélectrique dépasse un seuil déterminé.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif déclencheur à maximum de courant (28) comprend au moins un moyen de mesure pour mesurer l'intensité du courant circulant dans une phase du circuit secondaire du transformateur.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou les fusibles (11), le disjoncteur (15) et les moyens de déclenchement (28, 30) sont associés de telle manière que si le fusible ou l'un des fusibles fond, les moyens de déclenchement (28, 30) donnent un ordre de séparation des organes de contact.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou les fusibles (11) sont limiteurs.
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque pôle du disjoncteur comporte une ampoule à vide (17) immergée dans le diélectrique (5).
- Transformateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le disjoncteur (15) comporte un mécanisme de fermeture (22) apte à faire passer les organes de contact (19, 20) de leur position séparée à leur position de contact, comportant un organe de manoeuvre (23) accessible de l'extérieur de la cuve (4), le mécanisme d'ouverture (22) étant apte à provoquer l'ouverture du ou des pôles du disjoncteur quel que soit l'état du mécanisme de fermeture (22).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9810519A FR2782409B1 (fr) | 1998-08-14 | 1998-08-14 | Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles |
FR9810519 | 1998-08-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0981140A1 true EP0981140A1 (fr) | 2000-02-23 |
EP0981140B1 EP0981140B1 (fr) | 2004-01-28 |
Family
ID=9529752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990410089 Expired - Lifetime EP0981140B1 (fr) | 1998-08-14 | 1999-07-26 | Transformateur immerge auto-protege par un dispositif incluant un disjoncteur et des fusibles |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0981140B1 (fr) |
CN (1) | CN1206670C (fr) |
AR (1) | AR021200A1 (fr) |
AU (1) | AU753147B2 (fr) |
BR (1) | BR9903587A (fr) |
DE (1) | DE69914420T2 (fr) |
EA (1) | EA002377B1 (fr) |
ES (1) | ES2213999T3 (fr) |
FR (1) | FR2782409B1 (fr) |
ID (1) | ID23712A (fr) |
NO (1) | NO320723B1 (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002075757A1 (fr) * | 2001-03-21 | 2002-09-26 | Societe Nouvelle Transfix Toulon | Poste de transformation évolutif pour réseaux en coupure d'artère |
EP1267368A1 (fr) * | 2001-06-15 | 2002-12-18 | Schneider Electric Industries SAS | Transformateur de distribution auto-protégé par un disjoncteur déclenchant sur court-circuit secondaire |
EP0991090B1 (fr) * | 1998-10-01 | 2004-04-14 | Schneider Electric Industries SAS | Liaison électrique haute tension multifonctionnelle monobloc, comportant une traversée et une interface de raccordement à un fusible et dispositif de protection comportant une telle liaison électrique |
FR2849968A1 (fr) * | 2003-01-14 | 2004-07-16 | Grupo Ormazabal Sa | Centre de transformation pour transformateur autoprotege |
EP1806817A1 (fr) | 2006-01-09 | 2007-07-11 | Luis Gonzalo Flores Losada | Appareillage électrique immergé dans l'huile avec un dispositif de sécurité à court-circuit |
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 |
EP3651170A1 (fr) * | 2018-11-08 | 2020-05-13 | Thales | Systeme de detection et de limitation des effets de perte d'isolement d'un transformateur electrique |
EP4195226A1 (fr) * | 2021-12-13 | 2023-06-14 | Abb Schweiz Ag | Système de poste de transformation sous-marine |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2831342B1 (fr) * | 2001-10-22 | 2003-12-19 | Alstom | Systeme de protection d'un transformateur de distribution triphase a isolation dans un dielectrique liquide comportant un interrupteur sectionneur de phase |
US7372678B2 (en) * | 2005-08-24 | 2008-05-13 | Leviton Manufacturing Co., Inc. | Circuit interrupting device with automatic test |
US20110255199A1 (en) * | 2010-04-16 | 2011-10-20 | General Electric Company | Arc flash hazard reduction for transformer secondaries |
ES1212088Y (es) * | 2018-04-27 | 2018-08-03 | Ormazabal Corporate Tech A I E | Equipo electrico de alta tension con dispositivo de limitacion de la corriente de magnetizacion |
CN111477523B (zh) * | 2020-04-14 | 2022-09-13 | 阳光电源股份有限公司 | 逆变箱变一体机及其保护方法 |
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FR1162262A (fr) * | 1956-10-24 | 1958-09-10 | Merlin Gerin | Protection des installations contre les courts-circuits |
US3210604A (en) * | 1962-08-27 | 1965-10-05 | Rt & E Corp | Electrical system and method of establishing same |
US3292048A (en) * | 1964-10-20 | 1966-12-13 | Mc Graw Edison Co | Protected electrical transformer |
US3599135A (en) * | 1970-01-12 | 1971-08-10 | Ite Imperial Corp | Circuit protection arrangement including coordinated operation of a circuit breaker and a current limiting fuse |
US3666992A (en) * | 1970-10-22 | 1972-05-30 | Allis Chalmers Mfg Co | Protective means for distribution transformer |
EP0468299A2 (fr) * | 1990-07-21 | 1992-01-29 | AEG Sachsenwerk GmbH | Circuit avec un transformateur |
JPH07255122A (ja) * | 1994-03-15 | 1995-10-03 | Hitachi Ltd | 過電流保護回路 |
JPH0819173A (ja) * | 1994-06-24 | 1996-01-19 | Kansai Electric Power Co Inc:The | スポットネットワーク受電設備 |
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SU377895A1 (ru) * | 1967-07-15 | 1973-04-17 | Северо Западное отделение Всесоюзного государственного проектно изыскательского , научно исследовательского института Энергосетьпроект , Ленинградский ордена Ленина политехнический институт М. И. Калинина | УСТРОЙСТВО дл ПИТАНИЯ ИАГРУЗОК |
AU5007379A (en) * | 1978-09-08 | 1980-03-13 | Westinghouse Electric Corporation | Thermally sensitive protective device for transformer |
DE3343424A1 (de) * | 1983-12-01 | 1985-06-13 | Felten & Guilleaume Energietechnik GmbH, 5000 Köln | Schutzeinrichtung fuer transformatorabgaenge im mittelspannungsbereich |
US4743996A (en) * | 1986-05-22 | 1988-05-10 | Westinghouse Electric Corp. | Electrical distribution apparatus having fused draw-out surge arrester |
DE4023237A1 (de) * | 1990-04-14 | 1991-10-17 | Sachsenwerk Ag | Schalteinrichtung mit einem lastschalter oder lasttrennschalter und einer sicherung |
FR2712730B1 (fr) * | 1993-11-15 | 1995-12-29 | France Transfo Sa | Transformateur électrique imergé protégé. |
FR2750809B1 (fr) * | 1996-07-02 | 1998-10-30 | Transfix Soc Nouv | Dispositif de protection contre des effets des defauts internes d'un appareil electrique |
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1998
- 1998-08-14 FR FR9810519A patent/FR2782409B1/fr not_active Expired - Fee Related
-
1999
- 1999-07-26 EP EP19990410089 patent/EP0981140B1/fr not_active Expired - Lifetime
- 1999-07-26 DE DE1999614420 patent/DE69914420T2/de not_active Expired - Lifetime
- 1999-07-26 ES ES99410089T patent/ES2213999T3/es not_active Expired - Lifetime
- 1999-08-03 NO NO19993766A patent/NO320723B1/no not_active IP Right Cessation
- 1999-08-06 ID IDP990771D patent/ID23712A/id unknown
- 1999-08-12 CN CN 99117729 patent/CN1206670C/zh not_active Expired - Fee Related
- 1999-08-13 AU AU44447/99A patent/AU753147B2/en not_active Ceased
- 1999-08-13 EA EA199900657A patent/EA002377B1/ru not_active IP Right Cessation
- 1999-08-13 BR BR9903587A patent/BR9903587A/pt not_active Application Discontinuation
- 1999-08-13 AR ARP990104089 patent/AR021200A1/es active IP Right Grant
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FR1162262A (fr) * | 1956-10-24 | 1958-09-10 | Merlin Gerin | Protection des installations contre les courts-circuits |
US3210604A (en) * | 1962-08-27 | 1965-10-05 | Rt & E Corp | Electrical system and method of establishing same |
US3292048A (en) * | 1964-10-20 | 1966-12-13 | Mc Graw Edison Co | Protected electrical transformer |
US3599135A (en) * | 1970-01-12 | 1971-08-10 | Ite Imperial Corp | Circuit protection arrangement including coordinated operation of a circuit breaker and a current limiting fuse |
US3666992A (en) * | 1970-10-22 | 1972-05-30 | Allis Chalmers Mfg Co | Protective means for distribution transformer |
EP0468299A2 (fr) * | 1990-07-21 | 1992-01-29 | AEG Sachsenwerk GmbH | Circuit avec un transformateur |
JPH07255122A (ja) * | 1994-03-15 | 1995-10-03 | Hitachi Ltd | 過電流保護回路 |
JPH0819173A (ja) * | 1994-06-24 | 1996-01-19 | Kansai Electric Power Co Inc:The | スポットネットワーク受電設備 |
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PATENT ABSTRACTS OF JAPAN vol. 096, no. 005 31 May 1996 (1996-05-31) * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0991090B1 (fr) * | 1998-10-01 | 2004-04-14 | Schneider Electric Industries SAS | Liaison électrique haute tension multifonctionnelle monobloc, comportant une traversée et une interface de raccordement à un fusible et dispositif de protection comportant une telle liaison électrique |
WO2002075757A1 (fr) * | 2001-03-21 | 2002-09-26 | Societe Nouvelle Transfix Toulon | Poste de transformation évolutif pour réseaux en coupure d'artère |
FR2822601A1 (fr) * | 2001-03-21 | 2002-09-27 | Transfix Toulon Soc Nouv | Poste de transformation evolutif pour reseaux en coupure d'artere |
EP1267368A1 (fr) * | 2001-06-15 | 2002-12-18 | Schneider Electric Industries SAS | Transformateur de distribution auto-protégé par un disjoncteur déclenchant sur court-circuit secondaire |
FR2826173A1 (fr) * | 2001-06-15 | 2002-12-20 | Schneider Electric Ind Sa | Transformateur de distribution auto-protege par un disjoncteur declenchant sur court-circuit secondaire |
FR2849968A1 (fr) * | 2003-01-14 | 2004-07-16 | Grupo Ormazabal Sa | Centre de transformation pour transformateur autoprotege |
EP1806817A1 (fr) | 2006-01-09 | 2007-07-11 | Luis Gonzalo Flores Losada | Appareillage électrique immergé dans l'huile avec un dispositif de sécurité à court-circuit |
US7755868B2 (en) | 2006-01-09 | 2010-07-13 | Luis Gonzalo Flores Losada | Electrical equipment for distribution network |
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 |
EP3651170A1 (fr) * | 2018-11-08 | 2020-05-13 | Thales | Systeme de detection et de limitation des effets de perte d'isolement d'un transformateur electrique |
US11025048B2 (en) | 2018-11-08 | 2021-06-01 | Thales | System for detecting and limiting the effects of loss of insulation of an electrical transformer |
EP4195226A1 (fr) * | 2021-12-13 | 2023-06-14 | Abb Schweiz Ag | Système de poste de transformation sous-marine |
WO2023110262A1 (fr) * | 2021-12-13 | 2023-06-22 | Abb Schweiz Ag | Système de sous-station sous-marine |
Also Published As
Publication number | Publication date |
---|---|
EA199900657A2 (ru) | 2000-02-28 |
CN1206670C (zh) | 2005-06-15 |
FR2782409A1 (fr) | 2000-02-18 |
EA002377B1 (ru) | 2002-04-25 |
AU753147B2 (en) | 2002-10-10 |
ID23712A (id) | 2000-05-11 |
NO993766D0 (no) | 1999-08-03 |
AR021200A1 (es) | 2002-07-03 |
AU4444799A (en) | 2000-03-09 |
ES2213999T3 (es) | 2004-09-01 |
DE69914420T2 (de) | 2004-12-02 |
FR2782409B1 (fr) | 2002-11-29 |
BR9903587A (pt) | 2000-08-29 |
EA199900657A3 (ru) | 2000-04-24 |
CN1245342A (zh) | 2000-02-23 |
DE69914420D1 (de) | 2004-03-04 |
NO993766L (no) | 2000-02-15 |
EP0981140B1 (fr) | 2004-01-28 |
NO320723B1 (no) | 2006-01-23 |
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