EP0492018A1 - Electric measuring transformer - Google Patents
Electric measuring transformer Download PDFInfo
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- EP0492018A1 EP0492018A1 EP90403708A EP90403708A EP0492018A1 EP 0492018 A1 EP0492018 A1 EP 0492018A1 EP 90403708 A EP90403708 A EP 90403708A EP 90403708 A EP90403708 A EP 90403708A EP 0492018 A1 EP0492018 A1 EP 0492018A1
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- European Patent Office
- Prior art keywords
- transformer
- configuration
- plate
- phase
- range
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
Definitions
- the invention relates to improvements made to electrical measurement transformers.
- the present invention applies to transformers, single-phase or polyphase, such as current transformer, capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module. It will find its application in the field of electrical construction of such transformers.
- document EP 347.3O4 discloses an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module, which allows d '' avoid any risk of human error when adapting the configuration chosen for said transformer.
- this document relates to an electrical measurement transformer, the configuration of which can be adapted as a function of the range of use chosen, that is to say which, when its characteristics have been determined with respect to the 'use, easily adaptable to this use, preventing the risk of incorrect wiring.
- document EP 347,304 describes an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value il to an i2 compatible value with a measurement, counting, control or monitoring module, which has one side primary, as well as a secondary side, comprising at least one switchable winding, defining a transformation ratio i1 / i2 and consequently its range of use, and which comprises means for adapting the secondary configuration of the transformer according to the range of selected use which carry out at least the switching of the winding (s) according to the chosen range.
- the object of the present invention is to propose improvements for such a current measurement transformer, which makes it possible to increase safety both with respect to a possible manual intervention and for the installation in which it is integrated.
- the improvements to the electrical measurement transformer consist in providing, at the level of said means for adapting the configuration of the transformer, means for causing the short-circuiting of at least part of the secondary winding. during said adaptation.
- FIG. 1 schematically represents an embodiment of an electrical transformer for measuring single-phase current, produced according to the teachings of document EP 347,304 and including the improvements of the present application.
- FIG. 2 schematically shows a perspective view of the embodiment of a transformer operating according to the principle of FIG. 1.
- FIGS. 3a and 3b show a perspective view of a three-phase current transformer produced in accordance with the present invention and of an embodiment of the means of the present invention for adapting the configuration of the transformer.
- the present invention relates to the production of an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value i1 to a value compatible i2 with a measurement, counting, control or monitoring module, and which is capable of authorizing several transformation reports to authorize an almost universal use of the transformer.
- FIG. 1 illustrates a single-phase current transformer, which, by switching the secondary windings, allows the realization of three different transformation ratios such as for example 100, 200 and 500 primary amps for 5 secondary amps.
- said transformer comprises at least means for adapting the secondary configuration of the transformer as a function of the range of use chosen, which carry out at least the switching of the winding (s) according to the range chosen.
- FIG. 1 illustrates the case of a single-phase current transformer (1) having a primary circuit (2) and a secondary circuit (3) distributed over a magnetic circuit (4).
- the magnetic circuit (4) has a toroidal shape providing a central space capable of receiving at least one passage of a conductor traversed by the phase current, which then defines said primary circuit (2) .
- the configuration illustrated in FIG. 1 with two primary passages, 100/5, 200/5 and 500/5 are obtained by winding the first section with 40 turns, the second section also with 40 turns and the third section with 120 turns.
- the configuration illustrated in FIG. 1 with two primary passages, 100/5, 200/5 and 500/5 are obtained by winding the first section with 40 turns, the second section also with 40 turns and the third section with 120 turns.
- other cases can be envisaged.
- the transformer (1) includes means (6) for adapting the configuration of the transformer (1) according to the range of use chosen, which at least switch over the switch (es) secondary windings (5) according to the chosen range.
- these means (6) for adapting the configuration of the transformer are at least in the form of a plate or element (13), called configuration, wiring support, connectable, pluggable or snap-on on the body of the transformer (1).
- the wiring of this plate or element of configuration depends at least on the selected operating range. Also the means (6) will make it possible to carry out the internal wiring of the secondary winding (s) (5).
- said means (6), and more precisely the plate (13) makes a connection between S2 and S0 or in the case of the choice of the second ratio, in particular 200/5, the connection is made between S0 and S3, and finally in the case of the last report, in particular 500/5, the connection S0 and S4 is then carried out.
- the contacts are made by elastic lyres, able to cooperate with a cylinder or rod made of copper-metal alloy, as for example described in document EP 347,304.
- said means (6) for adapting the configuration of the transformer include means (7) for causing the short-circuiting of at least part of the secondary winding (5) during said adaptation.
- these means (7) consist of at least one short-circuiting contact (8) secured to an actuating member (9), carried by said configuration plate or element (13).
- the contact (8) consists of two contact blades normally closed at rest, that is to say that they allow the secondary (5) to be short-circuited when the configuration plate is not placed on the transformer.
- the transformer will have one contact (8) per phase placed at the level of the body of the transformer (1), this fixed part being wired to the rest of the installation.
- this fixed part being wired to the rest of the installation.
- other arrangements could be considered.
- said configuration plate or element (13) has means of protection (10) against accidental short-circuits of the voltage pick-up circuit of one or more phases, further able to allow isolation. of the voltage circuit during said adaptation or during an intervention on the installation.
- this or these fuses (11) are advantageously carried by said plate or configuration element (13).
- this fuse cooperates with a set of contacts (12) provided at the level of the transformer body (1).
- the fuse associated with each voltage draw tap ensures continuity of the circuit, while if the plate is removed from the transformer, the voltage circuit is isolated from the or of the phases considered.
- said plate or configuration element (13) will be, at least partially at the top of said fuses (11), transparent to allow visual control of the latter.
- Such a control is dependent on the structure of the fuses and it is possible, for example, to use fuses with a high breaking capacity with a melting indicator.
- Figures 3a and 3b show a practical embodiment of the protection means (10) formed of support clips (14) of fuses, integral with the configuration plate (13).
- Such clamps are known to those skilled in the art for supporting fuses.
- one of the legs of the clamp will advantageously be extended by a return suitable for making contact with fixed studs (12) placed opposite the fuses on the body of the transformer.
- the latter will advantageously be at least locked on the transformer body (1) by the intermediate a bolt (15) slidingly mounted on the outside of said plate (13), cooperating with lugs (16) integral with the body of the transformer (1).
- the lugs (16) will protrude relative to the upper plane of the plate (13) and provision will be made lugs (17) at the ends of the bolt (15) capable of entering holes (18) provided for this purpose in the tabs (16).
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Abstract
Description
L'invention est relative à des perfectionnements apportés aux transformateurs électriques de mesure.The invention relates to improvements made to electrical measurement transformers.
Plus précisément, la présente invention s'applique aux transformateurs, monophasés ou polyphasés, tels que transformateur de courant, aptes à adapter une valeur électrique réelle en une valeur compatible avec un module de mesure, de comptage, de contrôle ou de surveillance. Elle trouvera son application dans le domaine de la construction électrique de tels transformateurs.More specifically, the present invention applies to transformers, single-phase or polyphase, such as current transformer, capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module. It will find its application in the field of electrical construction of such transformers.
Dans ce domaine, on connaît du document EP 347.3O4 un transformateur électrique de mesure, monophasé ou polyphasé, apte à adapter une valeur électrique réelle en une valeur compatible avec un module de mesure, de comptage, de contrôle ou de surveillance, qui permette d'éviter tout risque d'erreur humaine lors de l'adaptation de la configuration choisie pour ledit transformateur.In this field, document EP 347.3O4 discloses an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module, which allows d '' avoid any risk of human error when adapting the configuration chosen for said transformer.
En particulier, ce document concerne un transformateur électrique de mesure, dont la configuration peut être adaptée en fonction de la plage d'utilisation choisie, c'est-à-dire qui soit, lorsque l'on a déterminé ses caractéristiques par rapport à l'utilisation, facilement adaptable à cette utilisation en prévenant les risques d'un mauvais câblage.In particular, this document relates to an electrical measurement transformer, the configuration of which can be adapted as a function of the range of use chosen, that is to say which, when its characteristics have been determined with respect to the 'use, easily adaptable to this use, preventing the risk of incorrect wiring.
Plus précisément, le document EP 347.304 décrit un transformateur électrique de mesure, monophasé ou polyphasé, apte à adapter une valeur électrique réelle il en une valeur compatible i2 avec un module de mesure, de comptage, de contrôle ou de surveillance, qui présente un côté primaire, ainsi qu'un côté secondaire, comportant au moins un enroulement commutable, définissant un rapport de transformation i1/i2 et par suite sa plage d'utilisation, et qui comporte des moyens pour adapter la configuration secondaire du transformateur en fonction de la plage d'utilisation choisie qui réalisent au moins la commutation du ou des enroulements selon la plage choisie.More specifically, document EP 347,304 describes an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value il to an i2 compatible value with a measurement, counting, control or monitoring module, which has one side primary, as well as a secondary side, comprising at least one switchable winding, defining a transformation ratio i1 / i2 and consequently its range of use, and which comprises means for adapting the secondary configuration of the transformer according to the range of selected use which carry out at least the switching of the winding (s) according to the chosen range.
Le but de la présente invention est de proposer des perfectionnements pour un tel transformateur de mesure de courant, qui permette d'augmenter la sécurité tant par rapport à une éventuelle intervention manuelle que pour l'installation dans laquelle il est intégré.The object of the present invention is to propose improvements for such a current measurement transformer, which makes it possible to increase safety both with respect to a possible manual intervention and for the installation in which it is integrated.
En effet, rappelons que, lorsque des travaux sont effectués sur de telles installations, en particulier sur les compteurs ou sur le câblage conduisant du secondaire du transformateur de courant au compteur, le distributeur d'énergie électrique se doit de ne pas interrompre sa fourniture à l'abonné consommateur.Indeed, remember that, when work is carried out on such installations, in particular on meters or on the wiring leading from the secondary of the current transformer to the meter, the electric energy distributor must not interrupt its supply to the consumer subscriber.
Aussi, par raison de sécurité, il faut donc pouvoir, d'une part, isoler les prises de tension et, d'autre part, court-circuiter au moins une fraction de l'enroulement secondaire du transformateur de courant afin d'éviter d'engendrer une tension humainement dangereuse à ses bornes ainsi qu'un échauffement exagéré du circuit magnétique lors d'un fonctionnement à secondaire ouvert.Also, for safety reasons, it is therefore necessary, on the one hand, to isolate the voltage taps and, on the other hand, short-circuit at least a fraction of the secondary winding of the current transformer in order to avoid d '' generate a humanly dangerous voltage across its terminals as well as excessive heating of the magnetic circuit during open secondary operation.
Ces impératifs sont a respecter lors de l'entretien de compteurs, lors de la modification du câblage des circuits compteurs et également lors de l'adaptation du transformateur à une configuration secondaire du transformateur en fonction de la plage d'utilisation choisie.These requirements must be observed when servicing meters, when modifying the wiring of the meter circuits and also when adapting the transformer to a secondary configuration of the transformer according to the range of use chosen.
A cet égard, selon la présente invention, les perfectionnements au transformateur électrique de mesure consistent à prévoir, au niveau desdits moyens pour adapter la configuration du transformateur, des moyens pour provoquer le court-circuitage d'au moins une partie de l'enroulement secondaire pendant ladite adaptation.In this regard, according to the present invention, the improvements to the electrical measurement transformer consist in providing, at the level of said means for adapting the configuration of the transformer, means for causing the short-circuiting of at least part of the secondary winding. during said adaptation.
En outre, selon les perfectionnements, on prévoit, au niveau desdits moyens pour adapter la configuration du transformateur, des moyens de protection contre les courts-circuits du circuit de prélèvement de tension de ou des phases, aptes en outre à permettre l'isolement du circuit de tension pendant ladite adaptation.In addition, according to the improvements, provision is made, at the level of said means for adapting the configuration of the transformer, to means for protection against short-circuits of the voltage sampling circuit of phases or, furthermore capable of allowing the isolation of the voltage circuit during said adaptation.
D'autres buts et avantages de la présente invention apparaîtront au cours de la description qui va suivre, accompagnée des dessins en annexe qui en font partie intégrante, qui permettra de mieux comprendre l'invention mais qui, cependant, n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter.Other objects and advantages of the present invention will emerge during the description which follows, accompanied by the appended drawings which form an integral part thereof, which will make it possible to better understand the invention but which, however, is given only for information only and which is not intended to limit it.
La figure 1 représente schématiquement un mode de réalisation d'un transformateur électrique de mesure de courant monophasé, réalisé selon les enseignements du document EP 347.304 et incluant les perfectionnements de la présente demande.FIG. 1 schematically represents an embodiment of an electrical transformer for measuring single-phase current, produced according to the teachings of document EP 347,304 and including the improvements of the present application.
La figure 2 montre schématiquement une vue en perspective de la réalisation d'un transformateur fonctionnant selon le principe de la figure 1.FIG. 2 schematically shows a perspective view of the embodiment of a transformer operating according to the principle of FIG. 1.
Les figures 3a et 3b montrent une vue en perspective d'un transformateur de courant triphasé réalisé conformément à la présente invention et d'un mode de réalisation des moyens de la présente invention pour adapter la configuration du transformateur.FIGS. 3a and 3b show a perspective view of a three-phase current transformer produced in accordance with the present invention and of an embodiment of the means of the present invention for adapting the configuration of the transformer.
La présente invention concerne la réalisation de transformateur électrique de mesure, monophasé ou polyphasé, apte à adapter une valeur électrique réelle i1 en une valeur compatible i2 avec un module de mesure, de comptage, de contrôle ou de surveillance, et qui soit apte à autoriser plusieurs rapports de transformation pour autoriser une utilisation du transformateur quasi universelle.The present invention relates to the production of an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value i1 to a value compatible i2 with a measurement, counting, control or monitoring module, and which is capable of authorizing several transformation reports to authorize an almost universal use of the transformer.
En particulier, la figure 1 illustre un transformateur de courant monophasé, qui, par commutation des enroulements secondaires, autorise la réalisation de trois rapports de transformation différents tels que par exemple 100, 200 et 500 ampères primaires pour 5 ampères secondaires.In particular, FIG. 1 illustrates a single-phase current transformer, which, by switching the secondary windings, allows the realization of three different transformation ratios such as for example 100, 200 and 500 primary amps for 5 secondary amps.
En outre, comme le décrit le document EP 347.304, ledit transformateur comporte au moins des moyens pour adapter la configuration secondaire du transformateur en fonction de la plage d'utilisation choisie, qui réalisent au moins la commutation du ou des enroulements selon la plage choisie.In addition, as described in document EP 347,304, said transformer comprises at least means for adapting the secondary configuration of the transformer as a function of the range of use chosen, which carry out at least the switching of the winding (s) according to the range chosen.
La figure 1 illustre le cas d'un transformateur (1) de courant monophasé présentant un circuit primaire (2) ainsi qu'un circuit secondaire (3) répartis sur un circuit magnétique (4).FIG. 1 illustrates the case of a single-phase current transformer (1) having a primary circuit (2) and a secondary circuit (3) distributed over a magnetic circuit (4).
Comme le montre particulièrement la figure 2, généralement le circuit magnétique (4) présente une forme torique ménageant un espace central apte à recevoir au moins un passage d'un conducteur parcouru par le courant de phase, qui définit alors ledit circuit primaire (2).As shown particularly in Figure 2, generally the magnetic circuit (4) has a toroidal shape providing a central space capable of receiving at least one passage of a conductor traversed by the phase current, which then defines said primary circuit (2) .
Dans le cas de la figure, on a représenté un conducteur passant deux fois à l'intérieur du tore afin d'obtenir un courant primaire dans le tore double du courant de phase i1. Toutefois, il est à noter qu'un raisonnement similaire peut être tenu avec un seul passage ou avec plus de deux passages.In the case of the figure, a conductor passing twice inside the torus in order to obtain a primary current in the torus double the phase current i1. However, it should be noted that similar reasoning can be held with a single pass or with more than two passages.
Sur le tore (4) est bobiné au moins un enroulement secondaire (5) qui, dans le cas présent, est constitué par un bobinage avec prise intermédiaire, le nombre de spires de ce bobinage dans ces différents tronçons étant dépendant des rapports de transformation à obtenir.On the torus (4) is wound at least one secondary winding (5) which, in the present case, consists of a winding with intermediate tap, the number of turns of this winding in these different sections being dependent on the transformation ratios to get.
Par exemple, la configuration illustrée à la figure 1 avec deux passages primaires, on obtient 100/5, 200/5 et 500/5 en bobinant respectivement le premier tronçon à 40 spires, le second tronçon également à 40 spires et le troisième tronçon à 120 spires. Naturellement, d'autres cas de figures peuvent être envisagés. En particulier, au lieu de prévoir un bobinage avec prise intermédiaire, on peut tout à fait prévoir des enroulements indépendants connectables en série et/ou en parallèle.For example, the configuration illustrated in FIG. 1 with two primary passages, 100/5, 200/5 and 500/5 are obtained by winding the first section with 40 turns, the second section also with 40 turns and the third section with 120 turns. Naturally, other cases can be envisaged. In particular, instead of providing a winding with intermediate tap, it is quite possible to provide independent windings connectable in series and / or in parallel.
Cela étant, comme le décrit le document EP 347.304, le transformateur (1) comporte des moyens (6) pour adapter la configuration du transformateur (1) en fonction de la plage d'utilisation choisie, qui réalisent au moins la commutation du ou des enroulements secondaires (5) selon la plage choisie.That said, as described in document EP 347,304, the transformer (1) includes means (6) for adapting the configuration of the transformer (1) according to the range of use chosen, which at least switch over the switch (es) secondary windings (5) according to the chosen range.
Dans le cas présent, ce sont cesdits moyens (6) qui permettent le choix entre trois plages d'utilisation en réalisant une connexion entre S2 et S0 pour le rapport 100/5, entre S3 et S0 pour le rapport 200/5 et entre S4 et S0 pour le rapport 500/5.In the present case, it is these means (6) which allow the choice between three ranges of use by making a connection between S2 and S0 for the ratio 100/5, between S3 and S0 for the ratio 200/5 and between S4 and S0 for the report 500/5.
Naturellement, ces moyens sont avantageux lors d'un couplage à transformateur polyphasé, ceci s'effectuant sur chaque phase simultanément.Naturally, these means are advantageous when coupled to a polyphase transformer, this being carried out on each phase simultaneously.
Dans un mode de réalisation, cesdits moyens (6) pour adapter la configuration du transformateur se présentent au moins sous la forme d'une plaque ou élément (13), dit de configuration, support de câblage, raccordable, enfichable ou encliquetable sur le corps du transformateur (1).In one embodiment, these means (6) for adapting the configuration of the transformer are at least in the form of a plate or element (13), called configuration, wiring support, connectable, pluggable or snap-on on the body of the transformer (1).
Le câblage de cette plaque ou élément de configuration est fonction au moins de la plage de fonctionnement choisie. Aussi les moyens (6) vont permettre de réaliser le câblage interne du ou des enroulements secondaires (5).The wiring of this plate or element of configuration depends at least on the selected operating range. Also the means (6) will make it possible to carry out the internal wiring of the secondary winding (s) (5).
En effet, dans le cas du choix du premier rapport de transformation, notamment 100/5, lesdits moyens (6), et plus précisément la plaque (13) réalise une connexion entre S2 et S0 ou dans le cas du choix du deuxième rapport, notamment 200/5, on réalise la connexion entre S0 et S3, et enfin dans le cas du dernier rapport, notamment 500/5, on réalise alors la connexion S0 et S4.Indeed, in the case of the choice of the first transformation ratio, in particular 100/5, said means (6), and more precisely the plate (13) makes a connection between S2 and S0 or in the case of the choice of the second ratio, in particular 200/5, the connection is made between S0 and S3, and finally in the case of the last report, in particular 500/5, the connection S0 and S4 is then carried out.
Par ailleurs, dans tous les cas, l'utilisation est toujours connectée entre les bornes S1 et S0 quel que soit le calibre choisi.Furthermore, in all cases, the use is always connected between the terminals S1 and S0 whatever the rating chosen.
Par ailleurs, dans un mode de réalisation, les contacts sont réalisés par des lyres élastiques, aptes à coopérer avec un cylindre ou pige en alliage métallique cuivreux, tel que par exemple le décrit le document EP 347.304.Furthermore, in one embodiment, the contacts are made by elastic lyres, able to cooperate with a cylinder or rod made of copper-metal alloy, as for example described in document EP 347,304.
Cela étant, selon la présente invention, lesdits moyens (6) pour adapter la configuration du transformateur comportent des moyens (7) pour provoquer le court-circuitage d'au moins une partie de l'enroulement secondaire (5) pendant ladite adaptation.However, according to the present invention, said means (6) for adapting the configuration of the transformer include means (7) for causing the short-circuiting of at least part of the secondary winding (5) during said adaptation.
Dans un mode de réalisation avantageux, cesdits moyens (7) sont constitués par au moins un contact de court-circuitage (8) assujetti à un organe d'actionnement (9), porté par ladite plaque ou élément (13) de configuration.In an advantageous embodiment, these means (7) consist of at least one short-circuiting contact (8) secured to an actuating member (9), carried by said configuration plate or element (13).
Comme le montrent les figures 1 et 2 dans le cas du monophasé ou la figure 3 dans le cas du triphasé, le contact (8) est constitué par deux lamelles de contact normalement fermées au repos, c'est-à-dire qu'elles permettent le court-circuitage du secondaire (5) lorsque la plaque de configuration n'est pas disposée sur le transformateur.As shown in FIGS. 1 and 2 in the case of the single-phase or in FIG. 3 in the case of the three-phase, the contact (8) consists of two contact blades normally closed at rest, that is to say that they allow the secondary (5) to be short-circuited when the configuration plate is not placed on the transformer.
Ainsi, lors de la configuration du transformateur à la plage choisie ou lors des travaux effectués sur l'installation, la plaque de configuration étant ôtée, il n'y a plus de risque de surtension aux bornes du secondaire, même si l'installation reste sous tension.Thus, when configuring the transformer at the chosen range or during work carried out on the installation, the configuration plate being removed, there is no longer any risk of overvoltage at the terminals of the secondary, even if the installation remains energized.
Dans le cas de la réalisation triphasée proposée à la figure 3, le transformateur disposera d'un contact (8) par phase placé au niveau du corps du transformateur (1), cette partie fixe étant câblée au reste de l'installation. Toutefois, d'autres dispositions pourraient être envisagées.In the case of the three-phase embodiment proposed in FIG. 3, the transformer will have one contact (8) per phase placed at the level of the body of the transformer (1), this fixed part being wired to the rest of the installation. However, other arrangements could be considered.
Par ailleurs, selon la présente invention, ladite plaque ou élément (13) de configuration présente des moyens de protection (10) contre les courts-circuits accidentels du circuit de prélèvement de tension de ou des phases, aptes en outre à permettre l'isolement du circuit de tension pendant ladite adaptation ou pendant une intervention sur l'installation.Furthermore, according to the present invention, said configuration plate or element (13) has means of protection (10) against accidental short-circuits of the voltage pick-up circuit of one or more phases, further able to allow isolation. of the voltage circuit during said adaptation or during an intervention on the installation.
A cet égard, il est courant dans les installations de comptage ou autre, de mesurer non seulement l'intensité mais aussi la tension entre phases et/ou entre phase et neutre.In this regard, it is common in metering or other installations to measure not only the intensity but also the voltage between phases and / or between phase and neutral.
Généralement, on profite du prélèvement de courant au primaire, entre les bornes P1 et P2 par exemple sur les figures 1 et 2, pour effectuer un repiquage de tension afin de disposer d'une information au niveau de la borne U. Pour protéger le circuit de prélèvement de tension, on place traditionnellement un fusible Fu, notamment à haut pouvoir de coupure, pour chaque phase à protéger.Generally, one takes advantage of the current draw at the primary, between the terminals P1 and P2 for example in FIGS. 1 and 2, to carry out a voltage transplanting in order to have information at the level of the terminal U. To protect the circuit voltage sampling, a Fu fuse is traditionally placed, in particular with a high breaking capacity, for each phase to be protected.
Selon la présente invention, ce ou ces fusibles (11) sont portés avantageusement par ladite plaque ou élément de configuration (13). En outre, ce fusible coopère avec un ensemble de contacts (12) prévus au niveau du corps du transformateur (1).According to the present invention, this or these fuses (11) are advantageously carried by said plate or configuration element (13). In addition, this fuse cooperates with a set of contacts (12) provided at the level of the transformer body (1).
Ainsi, lorsque la plaque de configuration est disposée sur un transformateur, le fusible associé à chaque prise de prélèvement de tension assure une continuité du circuit, tandis que si la plaque est ôtée du transformateur, on obtient alors l'isolement du circuit de tension du ou des phases considérées.Thus, when the configuration plate is placed on a transformer, the fuse associated with each voltage draw tap ensures continuity of the circuit, while if the plate is removed from the transformer, the voltage circuit is isolated from the or of the phases considered.
Pour autoriser un bon fonctionnement du module de mesure, de comptage, de contrôle ou de surveillance utilisant un tel transformateur, il est nécessaire de pouvoir contrôler le bon état desdits fusibles (11).To allow proper operation of the measuring, counting, control or monitoring module using such a transformer, it is necessary to be able to check the good condition of said fuses (11).
Dans un mode de réalisation de la présente invention, ladite plaque ou élément de configuration (13) sera, au moins en partie au niveau du haut desdits fusibles (11), transparent pour autoriser le contrôle visuel de ces derniers.In one embodiment of the present invention, said plate or configuration element (13) will be, at least partially at the top of said fuses (11), transparent to allow visual control of the latter.
Un tel contrôle est dépendant de la structure des fusibles et on pourra par exemple utiliser des fusibles à haut pouvoir de coupure avec voyant de fusion.Such a control is dependent on the structure of the fuses and it is possible, for example, to use fuses with a high breaking capacity with a melting indicator.
On pourra également utiliser de tels fusibles avec percuteur qui permettront de répercuter leur état de fusion sur un contact judicieusement placé dans le circuit de l'installation.It is also possible to use such fuses with striker which will make it possible to pass on their melting state to a contact judiciously placed in the circuit of the installation.
Les figures 3a et 3b montrent une réalisation pratique des moyens de protection (10) formés de pinces supports (14) de fusibles, solidaires de la plaque de configuration (13). De telles pinces sont connues de l'Homme de l'Art pour supporter des fusibles. Toutefois, une des pattes de la pince sera avantageusement prolongée par un retour apte à faire contact avec des plots fixes (12) placés en vis-à-vis des fusibles sur le corps du transformateur.Figures 3a and 3b show a practical embodiment of the protection means (10) formed of support clips (14) of fuses, integral with the configuration plate (13). Such clamps are known to those skilled in the art for supporting fuses. However, one of the legs of the clamp will advantageously be extended by a return suitable for making contact with fixed studs (12) placed opposite the fuses on the body of the transformer.
Enfin, pour autoriser un bon fonctionnement du transformateur et pour permettre un bon contact entre les différents éléments placés sur le corps du transformateur et sur la plaque de configuration, cette dernière sera avantageusement au moins verrouillée sur le corps du transformateur (1) par l'intermédiaire d'une targette (15) montée à coulissement extérieurement sur ladite plaque (13), coopérant avec des pattes (16) solidaires du corps du transformateur (1).Finally, to allow correct operation of the transformer and to allow good contact between the various elements placed on the transformer body and on the configuration plate, the latter will advantageously be at least locked on the transformer body (1) by the intermediate a bolt (15) slidingly mounted on the outside of said plate (13), cooperating with lugs (16) integral with the body of the transformer (1).
Comme le montre particulièrement la figure 3, lorsque la plaque ou l'élément de configuration (13) est disposé sur le corps du transformateur, les pattes (16) seront en saillie par rapport au plan supérieur de la plaque (13) et on prévoira des ergots (17) au niveau des extrémités de la targette (15) aptes à pénétrer dans des orifices (18) prévus à cet effet dans les pattes (16).As shown particularly in FIG. 3, when the plate or the configuration element (13) is disposed on the body of the transformer, the lugs (16) will protrude relative to the upper plane of the plate (13) and provision will be made lugs (17) at the ends of the bolt (15) capable of entering holes (18) provided for this purpose in the tabs (16).
De l'élément de mesure et notamment de la configuration du transformateur dépendra le bon fonctionnement de l'installation, c'est pourquoi on prévoira avantageusement des moyens de plombage (19) de la targette pour éviter toute manoeuvre intempestive par un personnel non autorisé. De tels moyens sont traditionnels dans le domaine et bien connus de l'Homme du métier.The correct operation of the installation will depend on the measuring element and in particular the configuration of the transformer, this is why we will provide advantageously sealing means (19) of the bolt to avoid any untimely operation by unauthorized personnel. Such means are traditional in the field and well known to those skilled in the art.
Naturellement, d'autres mises en oeuvre de la présente invention, à la portée de l'Homme de l'Art, auraient pu être envisagées sans pour autant sortir du cadre de celle-ci.Naturally, other implementations of the present invention, within the reach of those skilled in the art, could have been envisaged without departing from the scope thereof.
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8916581A FR2655476B2 (en) | 1988-06-17 | 1989-12-05 | ELECTRIC MEASUREMENT TRANSFORMER. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0492018A1 true EP0492018A1 (en) | 1992-07-01 |
Family
ID=9388524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90403708A Withdrawn EP0492018A1 (en) | 1989-12-05 | 1990-12-20 | Electric measuring transformer |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP0492018A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6865073B2 (en) * | 2003-03-06 | 2005-03-08 | General Electric Company | Panelboard metering arrangement and method of assembly thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1352219A (en) * | 1963-01-02 | 1964-02-14 | Electrical transformation and control equipment by interchangeable system adapted to a main network | |
| US3512043A (en) * | 1967-11-09 | 1970-05-12 | Asea Ab | Means for short-circuiting the secondary circuit of a current transformer |
| US3564392A (en) * | 1969-09-19 | 1971-02-16 | Gen Electric | Magnetic transducer with means for compensating for temperature changes |
| DE2739499A1 (en) * | 1977-08-30 | 1979-03-08 | Siemens Ag | Miniature voltage transformer construction - has sliding spring steel stirrup which can short circuit and open secondary terminals |
| FR2655476A2 (en) * | 1988-06-17 | 1991-06-07 | Avocat Jean Paul | Electrical measurement transformer |
-
1990
- 1990-12-20 EP EP90403708A patent/EP0492018A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1352219A (en) * | 1963-01-02 | 1964-02-14 | Electrical transformation and control equipment by interchangeable system adapted to a main network | |
| US3512043A (en) * | 1967-11-09 | 1970-05-12 | Asea Ab | Means for short-circuiting the secondary circuit of a current transformer |
| US3564392A (en) * | 1969-09-19 | 1971-02-16 | Gen Electric | Magnetic transducer with means for compensating for temperature changes |
| DE2739499A1 (en) * | 1977-08-30 | 1979-03-08 | Siemens Ag | Miniature voltage transformer construction - has sliding spring steel stirrup which can short circuit and open secondary terminals |
| FR2655476A2 (en) * | 1988-06-17 | 1991-06-07 | Avocat Jean Paul | Electrical measurement transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6865073B2 (en) * | 2003-03-06 | 2005-03-08 | General Electric Company | Panelboard metering arrangement and method of assembly thereof |
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