EP2251885A1 - Medium- and high-voltage linear electrical disconnect switch with resistor - Google Patents
Medium- and high-voltage linear electrical disconnect switch with resistor Download PDFInfo
- Publication number
- EP2251885A1 EP2251885A1 EP10161851A EP10161851A EP2251885A1 EP 2251885 A1 EP2251885 A1 EP 2251885A1 EP 10161851 A EP10161851 A EP 10161851A EP 10161851 A EP10161851 A EP 10161851A EP 2251885 A1 EP2251885 A1 EP 2251885A1
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- Prior art keywords
- contact
- fixed
- current
- movable contact
- movable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
- H01H33/168—Impedances connected with contacts the impedance being inserted both while closing and while opening the switch
Definitions
- the invention relates to the field of the distribution of the medium and high voltage electrical current and, in particular, the switch-disconnector devices used in the transmission lines of the medium-voltage electrical energy.
- switch-disconnectors At present, there are different types of switch-disconnectors on the market. They are differentiated, among other things, by their principle of breaking the electric current.
- a first type of switch-disconnector operates in a sulfur hexafluoride SF 6 environment where, most often, the functions of interruption or sectioning of the electric current are performed at the same time by the mechanical separation of movable contacts. compared to others, over a distance sufficient to ensure sectioning.
- the cells in which these switches are installed are of small width, for example 375 mm for 24 kV.
- Another technology is to interrupt the current in the ambient air. Again, the functions of interruption or sectioning of the electric current are performed at the same time by the mechanical separation of the contacts.
- the cells in which these switches are installed have a large width, for example 600 to 700 mm for 24 kV.
- Another technique is to operate the interruption of the electric current in the vacuum, for example by means of a vacuum interrupter placed in series with a disconnector placed on the transmission line of the electric current. This solution is expensive and is not widely used.
- Another technology is to operate the interruption of the electric current in oil. This is the case of older generation devices.
- the switch disconnectors operating in the medium voltage SF 6 can interrupt electrical currents of the order of 600 to 800 amperes. Above 800 amps and especially for the value of 1,250 amps, the switches made have costs much higher than other switch-disconnectors.
- the electric power cutoff cells operating in the air are large and generally have lower cutoff performance than those obtained with devices operating in the SF 6 .
- the cut-off of the nominal current is always done by separating the contacts without any attempt being made, by any method, during the opening phase. contacts, to reduce the value of the intensity of the current and supply the value of the power factor. Indeed, it is easier to cut a current in phase with the voltage.
- the object of the invention is to propose another medium and high voltage current switch technology using one or more resistors, able to operate both in the SF 6 gas and without the use of it, without presenting a high manufacturing cost and having a low impact on the greenhouse effect.
- the moving contact is translated linearly to be able to ensure the passage and the breaking of the current by the two respective positions, the first current passage position in which the movable contact is in contact with the fixed contact and the second position. cutting the current in which the movable contact is spaced from the fixed contact.
- a first type of contact between the two fixed or movable contacts is completed in the linear direction of movement of the moving contact by the at least one electrical resistance whose contact extends linearly along the path of the moving contact, so to gradually vary the value of the resistance of the assembly as the respective displacement of the fixed and movable contacts.
- the resistance during a current cutting operation, makes it possible to reduce the intensity and the voltage across the cables and increase the power factor.
- the resistance is unique.
- the latter is fixed to the fixed contact and has a longitudinal surface on which slides the movable contact.
- the single resistance is fixed to the moving contact and has a longitudinal surface that slides on the fixed contact.
- a second embodiment of the invention use is made of several resistors fixed to the fixed contact and having a plurality of interposed conductive contacts of insulating zones constituting a linear bar having a longitudinal surface on which the movable contact slides.
- the resistors are offset outside the switch-disconnector breaking chamber to facilitate the heat dissipation of the assembly.
- the first embodiment of the invention is a switch-disconnector comprising a fixed contact 1 on which the electric current arrives, as shown by the vertical arrow and a movable contact 2, shown in contact with the fixed contact 1 in this figure.
- the fixed contact 1 has a resistor 3 consisting of a resistive bar extending relative to the fixed contact 1.
- the movable contact 2 is translated linearly, for example horizontally, as shown by the horizontal arrow on this Figure 1A .
- it has at least one side in contact with a longitudinal surface 4 of the resistive bar constituting the resistor 3.
- the movable contact 2 has slid on the longitudinal surface 4 and the resistor 3 to move away from the fixed contact 1 and cut off the current.
- a second variant of this first embodiment consists of setting a resistor 13 similar to that of the Figures 1A and 1B , not in the fixed contact 11, but in the moving contact 12.
- the position of the switch-disconnector is the current passage position, that is to say that the fixed contacts 11 and mobile 12 are in contact with each other.
- the horizontal arrow shows, when you want to achieve a current cutting operation, the movable contact 12, with its resistance 13, is translated.
- a longitudinal surface 14 of the resistor 13 remains in contact with a fixed contact surface 11 by sliding on it.
- the Figure 2B shows the moment when the longitudinal surface 14 of the resistor 13 is no longer in contact with the fixed contact 11, the movable contact 12 having moved linearly to move away from the fixed contact 11.
- a second embodiment of the invention is to replace the resistors 3 and 13 of the first embodiments by a set of resistors 23, connected in series.
- the assembly is completed by several conductive contacts 25 which are interposed with insulating parts 26, this alternation taking the form of a linear bar 27, similar to the shape of the bar constituting the resistors 3 and 13 of the first embodiments.
- the conductive contacts 25 are relayed to all the resistors 23, therebetween, by conductors 28.
- figure 3B shows the moment when the movable contact 22 is no longer in contact with the linear bar 27.
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
L'invention concerne le domaine de la distribution du courant électrique sous moyenne et haute tension et, en particulier, les appareils interrupteurs-sectionneurs utilisés dans les lignes de transport de l'énergie électrique sous moyenne tension.The invention relates to the field of the distribution of the medium and high voltage electrical current and, in particular, the switch-disconnector devices used in the transmission lines of the medium-voltage electrical energy.
A l'heure actuelle, il existe différents types d'interrupteurs-sectionneurs sur le marché. Ils se différencient, entre autres, par leur principe de coupure du courant électrique.At present, there are different types of switch-disconnectors on the market. They are differentiated, among other things, by their principle of breaking the electric current.
Un premier type d'interrupteur-sectionneur fonctionne dans un environnement d'hexafluorure de soufre SF6 où, le plus souvent, les fonctions d'interruption ou de sectionnement du courant électrique sont réalisées en même temps par la séparation mécanique de contacts mobiles les uns par rapport aux autres, sur une distance suffisante pour assurer le sectionnement. De manière générale, les cellules dans lesquelles sont installés ces interrupteurs sont de faible largeur, par exemple 375 mm pour 24 kV.A first type of switch-disconnector operates in a sulfur hexafluoride SF 6 environment where, most often, the functions of interruption or sectioning of the electric current are performed at the same time by the mechanical separation of movable contacts. compared to others, over a distance sufficient to ensure sectioning. In general, the cells in which these switches are installed are of small width, for example 375 mm for 24 kV.
Une autre technologie consiste à opérer l'interruption du courant dans l'air ambiant. Là encore, les fonctions d'interruption ou de sectionnement du courant électrique sont réalisées en même temps par la séparation mécanique des contacts. Dans cette technologie, les cellules dans lesquelles sont installés ces interrupteurs ont une grande largeur, par exemple 600 à 700 mm pour 24 kV.Another technology is to interrupt the current in the ambient air. Again, the functions of interruption or sectioning of the electric current are performed at the same time by the mechanical separation of the contacts. In this technology, the cells in which these switches are installed have a large width, for example 600 to 700 mm for 24 kV.
Une autre technique consiste à opérer l'interruption du courant électrique dans le vide, par exemple au moyen d'une ampoule à vide mise en série avec un sectionneur placé sur la ligne de transmission du courant électrique. Cette solution s'avère coûteuse et n'est pas très utilisée.Another technique is to operate the interruption of the electric current in the vacuum, for example by means of a vacuum interrupter placed in series with a disconnector placed on the transmission line of the electric current. This solution is expensive and is not widely used.
Une autre technologie consiste à opérer l'interruption du courant électrique dans de l'huile. C'est le cas des appareils d'anciennes générations.Another technology is to operate the interruption of the electric current in oil. This is the case of older generation devices.
D'autres technologies consistent à opérer l'interruption du courant électrique dans d'autres gaz, tels que le N2, CO2. Les fonctions d'interruption et de sectionnement du courant sont réalisées en même temps par la séparation mécanique du contact. On note que ces appareils ont un impact sur l'effet de serre bien plus faible que ceux fonctionnant avec le SF6.Other technologies consist in interrupting the electric current in other gases, such as N 2 , CO 2 . The functions of interruption and sectioning of the current are carried out at the same time by the mechanical separation of the contact. These devices have a much lower impact on the greenhouse effect than those with SF 6 .
Toutefois, ces différentes technologies présentent des inconvénients.However, these different technologies have disadvantages.
Les interrupteurs-sectionneurs fonctionnant dans le SF6, à moyenne tension, peuvent interrompre des courants électriques de l'ordre de 600 à 800 ampères. Au-delà de 800 ampères et notamment pour la valeur de 1 250 ampères, les interrupteurs réalisés ont des coûts très supérieurs aux autres interrupteurs-sectionneurs.The switch disconnectors operating in the medium voltage SF 6 can interrupt electrical currents of the order of 600 to 800 amperes. Above 800 amps and especially for the value of 1,250 amps, the switches made have costs much higher than other switch-disconnectors.
Les cellules de coupure de courant électrique fonctionnant dans l'air sont de grandes dimensions et présentent généralement des performances en coupure inférieures à celles que l'on obtient avec des appareils fonctionnant dans le SF6.The electric power cutoff cells operating in the air are large and generally have lower cutoff performance than those obtained with devices operating in the SF 6 .
D'autre part, les cellules comprenant un interrupteur et un sectionneur sans gaz SF6 coûtent aujourd'hui 30% pour plus chères que celles équivalentes, mais fonctionnant avec le gaz SF6. Toutefois, elles sont toujours à l'ordre du jour, compte tenu de la prise de conscience de l'impact du gaz SF6 sur le réchauffement climatique du globe terrestre.On the other hand, the cells comprising a switch and a disconnector without SF 6 gas today cost 30% more expensive than those equivalent, but operating with SF 6 gas. However, they are still on the agenda, given the awareness of the impact of SF 6 gas on the global warming of the Earth.
Beaucoup d'investigations ont été menées par différents constructeurs pour remplacer le SF6 par un gaz ayant un faible impact sur l'effet de serre. Les résultats ne sont, pour l'instant, guère probants, car il s'avère plus que difficile de couper un courant d'intensité supérieure à 400 Ampères, notamment lorsque le courant est inductif ou capacitif, c'est-à-dire avec un facteur de puissance proche de 0, mise à part l'utilisation récente du CF3I, c'est-à-dire le trifluoroiodométhane.Many investigations have been conducted by different manufacturers to replace the SF 6 with a gas with a low impact on the greenhouse effect. The results are, for the moment, hardly convincing, because it proves more than difficult to cut a current of intensity higher than 400 Amperes, in particular when the current is inductive or capacitive, that is to say with a power factor close to 0, apart from the recent use of CF 3 I, that is to say trifluoroiodomethane.
Quel que soit le type de technologie utilisé, avec ou sans gaz ou bien dans le vide, la coupure du courant nominal se fait toujours par séparation des contacts sans que l'on cherche, par un quelconque procédé, lors de la phase d'ouverture des contacts, à réduire la valeur de l'intensité du courant et alimenter la valeur du facteur de puissance. En effet, on coupe plus facilement un courant en phase avec la tension.Whatever the type of technology used, with or without gas or in a vacuum, the cut-off of the nominal current is always done by separating the contacts without any attempt being made, by any method, during the opening phase. contacts, to reduce the value of the intensity of the current and supply the value of the power factor. Indeed, it is easier to cut a current in phase with the voltage.
En outre, dans le domaine des installations du même type mais adaptées au traitement de la basse tension, et pour des applications très spécifiques, comme la fermeture sur un banc de condensateurs où l'intensité du courant peut être très élevée, il est connu d'insérer dans les circuits une résistance qui a pour objectif de diminuer la valeur de crête du courant. A cet effet, on cite le document de brevet européen
Le but de l'invention est de proposer une autre technologie d'interrupteur de courant à moyenne et haute tension utilisant une ou plusieurs résistances, pouvant fonctionner à la fois dans le gaz SF6 et sans l'utilisation de celui-ci, sans présenter un coût de fabrication élevé et ayant un faible impact sur l'effet de serre.The object of the invention is to propose another medium and high voltage current switch technology using one or more resistors, able to operate both in the SF 6 gas and without the use of it, without presenting a high manufacturing cost and having a low impact on the greenhouse effect.
A cet effet, l'objet principal de l'invention est un interrupteur-sectionneur électrique de moyenne tension et haute tension, par séparation mécanique des contacts électriques, l'interrupteur-sectionneur comprenant :
- un contact fixe relié à un conducteur électrique ; et
- un contact mobile selon une direction déterminée, pour pouvoir assurer le passage et la coupure du courant électrique par deux positions respectives, une première position de passage de courant dans laquelle le contact mobile est mis en contact avec le au moins un contact fixe et une deuxième position de coupure du courant, décalée par rapport à la position de passage de courant et dans laquelle le contact mobile est écarté du contact fixe,
- au moins une résistance en série dans le circuit électrique de l'ensemble de l'interrupteur-sectionneur, pour dissiper une partie de la puissance électrique pendant les opérations d'ouverture et de fermeture.
- a fixed contact connected to an electrical conductor; and
- a movable contact in a given direction, to be able to ensure the passage and the cutting of the electric current by two respective positions, a first current passage position in which the movable contact is brought into contact with the at least one fixed contact and a second current breaking position, shifted with respect to the current flow position and in which the moving contact is moved away from the fixed contact,
- at least one series resistor in the electrical circuit of the switch-disconnector assembly, to dissipate a portion of the electrical power during the opening and closing operations.
Selon l'invention, le contact mobile se translate linéairement pour pouvoir assurer le passage et la coupure du courant par les deux positions respectives, la première position de passage du courant dans laquelle le contact mobile est en contact avec le contact fixe et la deuxième position de coupure du courant dans laquelle le contact mobile est écarté du contact fixe. De plus, un premier type de contact parmi les deux contacts fixe ou mobile est complété dans la direction linéaire de déplacement du contact mobile par la au moins une résistance électrique dont le contact s'étend linéairement le long du trajet du contact mobile, de manière à faire varier progressivement la valeur de la résistance de l'ensemble au fur et à mesure du déplacement respectif des contacts fixe et mobile. Ainsi, la résistance, durant une opération de coupure du courant, permet de diminuer l'intensité et la tension aux bornes des câbles et d'augmenter le facteur de puissance.According to the invention, the moving contact is translated linearly to be able to ensure the passage and the breaking of the current by the two respective positions, the first current passage position in which the movable contact is in contact with the fixed contact and the second position. cutting the current in which the movable contact is spaced from the fixed contact. In addition, a first type of contact between the two fixed or movable contacts is completed in the linear direction of movement of the moving contact by the at least one electrical resistance whose contact extends linearly along the path of the moving contact, so to gradually vary the value of the resistance of the assembly as the respective displacement of the fixed and movable contacts. Thus, the resistance, during a current cutting operation, makes it possible to reduce the intensity and the voltage across the cables and increase the power factor.
Dans une première réalisation de l'invention, la résistance est unique.In a first embodiment of the invention, the resistance is unique.
Dans une première variante, cette dernière est fixée au contact fixe et possède une surface longitudinale sur laquelle glisse le contact mobile.In a first variant, the latter is fixed to the fixed contact and has a longitudinal surface on which slides the movable contact.
Dans une deuxième variante de cette première réalisation, la résistance unique est fixée au contact mobile et possède une surface longitudinale qui glisse sur le contact fixe.In a second variant of this first embodiment, the single resistance is fixed to the moving contact and has a longitudinal surface that slides on the fixed contact.
Dans une deuxième réalisation de l'invention, on utilise plusieurs résistances fixées au contact fixe et possédant plusieurs contacts conducteurs intercalés de zones isolantes constituant un barreau linéaire présentant une surface longitudinale sur laquelle glisse le contact mobile.In a second embodiment of the invention, use is made of several resistors fixed to the fixed contact and having a plurality of interposed conductive contacts of insulating zones constituting a linear bar having a longitudinal surface on which the movable contact slides.
De préférence, dans cette deuxième réalisation, les résistances sont déportées à l'extérieur de la chambre de coupure de l'interrupteur-sectionneur pour faciliter la dissipation thermique de l'ensemble.Preferably, in this second embodiment, the resistors are offset outside the switch-disconnector breaking chamber to facilitate the heat dissipation of the assembly.
L'invention et ses caractéristiques techniques seront mieux comprises à la lecture de la description de plusieurs réalisations de l'invention et accompagnées de plusieurs figures représentant respectivement :
-
figures 1A et 1B , des schémas relatifs à la première réalisation de l'invention dans une première variante ; -
figures 2A et 2B , des schémas relatifs à la première réalisation de l'invention dans une deuxième variante ; et -
figures 3A et 3B , des schémas relatifs à la deuxième réalisation de l'invention.
-
Figures 1A and 1B , diagrams relating to the first embodiment of the invention in a first variant; -
Figures 2A and 2B , diagrams relating to the first embodiment of the invention in a second variant; and -
Figures 3A and 3B , diagrams relating to the second embodiment of the invention.
En référence à la
Comme le montre la
Cette translation se déroule pendant quelques millisecondes durant lesquelles une partie de l'énergie électrique, transitant encore entre le contact fixe 1 et le contact mobile 2, est dissipée par la résistance 3 dont la valeur augmente au fur et à mesure du déplacement du contact mobile 2. A titre indicatif, sous une tension de 12 000 Volts, on peut dimensionner le barreau constituant la résistance 3 pour diviser la valeur du courant électrique par environ 2. Ainsi, en insérant une résistance de 13 Ohms, on peut faire passer un courant de 630 Ampères avec un cosinus ϕ (relatif au facteur de puissance) de 0,7 à un courant de 313 Ampères avec un cosinus ϕ de 0,93. Une telle résistance 3 peut être réalisée dans un barreau de céramique constituée de nitrure de bore, de carbure, bien que ce procédé soit coûteux. Elle peut être également constituée d'un empilage de rondelles à base de carbone.This translation takes place for a few milliseconds during which part of the electrical energy, still passing between the fixed contact 1 and the moving
On comprend que la résistance instantannée de l'ensemble augmente au fur et à mesure du déplacement du contact mobile 2 pour retomber à zéro lorsque ce dernier quitte le contact fixe 1.It is understood that the instantaneous resistance of the assembly increases as the displacement of the moving
En référence à la
La
On obtient les mêmes avantages et caractéristiques électriques, avec cette deuxième variante que pour la première, illustrée par les
En référence à la
Cette solution permet de déporter à l'extérieur de la chambre de coupure de l'interrupteur-sectionneur les résistances 23, dans le but d'améliorer la dissipation thermique de ces dernières.This solution enables the
Claims (5)
caractérisé en ce que le contact mobile (2, 12, 22) se translate linéairement pour pouvoir assurer le passage et la coupure du courant par les deux positions respectives de passage et de coupure du courant dans laquelle le contact mobile (2, 12, 22) est en contact avec le contact fixe (1, 11, 21) et la deuxième position de coupure de courant dans laquelle le contact mobile (2, 12, 22) est écarté du contact fixe (1, 11, 21), et en ce qu'un premier type de contact parmi les deux contacts fixe (1, 11, 21) ou mobile est complété par la au moins une résistance électrique (3, 13, 23) dont le ou les contact(s) s'étend(ent) linéairement dans la direction linéaire de déplacement du contact mobile (2, 12, 22), le long du trajet de ce contact mobile (2, 12, 22) de manière à faire varier progressivement la valeur de la résistance de l'ensemble au fur et à mesure du déplacement respectif des contacts fixe (1, 11, 21) et mobile (2, 12, 22).
characterized in that the movable contact (2, 12, 22) translates linearly to be able to ensure the passage and the breaking of the current by the two respective positions of passage and cut-off of the current in which the moving contact (2, 12, 22 ) is in contact with the fixed contact (1, 11, 21) and the second current cut-off position in which the movable contact (2, 12, 22) is separated from the fixed contact (1, 11, 21), and what a first type of contact between the two fixed (1, 11, 21) or movable contacts is completed by the at least one electrical resistor (3, 13, 23) whose contact (s) extends (ent) linearly in the linear direction moving the movable contact (2, 12, 22) along the path of this movable contact (2, 12, 22) so as to gradually vary the resistance value of the assembly as the displacement progresses respective fixed (1, 11, 21) and movable (2, 12, 22) contacts.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953093A FR2945374B1 (en) | 2009-05-11 | 2009-05-11 | HIGH RESIDENCE MEDIUM - VOLTAGE LINEAR ELECTRICAL SELECTOR SWITCH. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2251885A1 true EP2251885A1 (en) | 2010-11-17 |
EP2251885B1 EP2251885B1 (en) | 2013-08-14 |
Family
ID=41354014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100161851 Active EP2251885B1 (en) | 2009-05-11 | 2010-05-04 | Medium- and high-voltage linear electrical disconnect switch with resistor |
Country Status (3)
Country | Link |
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EP (1) | EP2251885B1 (en) |
ES (1) | ES2432291T3 (en) |
FR (1) | FR2945374B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103117180A (en) * | 2011-11-16 | 2013-05-22 | 施耐德电器工业公司 | Contact assembly and breaker comprising the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1305748A (en) * | 1960-10-28 | 1962-10-05 | Westinghouse Electric Corp | Light switch |
US4553008A (en) * | 1984-06-14 | 1985-11-12 | Cooper Industries, Inc. | Load interrupter |
EP1973133A2 (en) | 2007-03-22 | 2008-09-24 | Korea Electro Technology Research Institute | Circuit breaker using arc contact |
-
2009
- 2009-05-11 FR FR0953093A patent/FR2945374B1/en active Active
-
2010
- 2010-05-04 ES ES10161851T patent/ES2432291T3/en active Active
- 2010-05-04 EP EP20100161851 patent/EP2251885B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1305748A (en) * | 1960-10-28 | 1962-10-05 | Westinghouse Electric Corp | Light switch |
US4553008A (en) * | 1984-06-14 | 1985-11-12 | Cooper Industries, Inc. | Load interrupter |
EP1973133A2 (en) | 2007-03-22 | 2008-09-24 | Korea Electro Technology Research Institute | Circuit breaker using arc contact |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103117180A (en) * | 2011-11-16 | 2013-05-22 | 施耐德电器工业公司 | Contact assembly and breaker comprising the same |
CN103117180B (en) * | 2011-11-16 | 2015-12-02 | 施耐德电器工业公司 | Contact assembly and the circuit breaker comprising this contact assembly |
Also Published As
Publication number | Publication date |
---|---|
FR2945374B1 (en) | 2014-09-26 |
FR2945374A1 (en) | 2010-11-12 |
EP2251885B1 (en) | 2013-08-14 |
ES2432291T3 (en) | 2013-12-02 |
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