EP3029698B1 - Metal shell for electrical switching device - Google Patents

Metal shell for electrical switching device Download PDF

Info

Publication number
EP3029698B1
EP3029698B1 EP15197293.2A EP15197293A EP3029698B1 EP 3029698 B1 EP3029698 B1 EP 3029698B1 EP 15197293 A EP15197293 A EP 15197293A EP 3029698 B1 EP3029698 B1 EP 3029698B1
Authority
EP
European Patent Office
Prior art keywords
flank
wall
slot
shell
current
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.)
Active
Application number
EP15197293.2A
Other languages
German (de)
French (fr)
Other versions
EP3029698A1 (en
Inventor
Didier Rodrigues
Denis Frigiere
Jean-Marc Willieme
Frank Jacquier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
General Electric Technology GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Electric Technology GmbH filed Critical General Electric Technology GmbH
Publication of EP3029698A1 publication Critical patent/EP3029698A1/en
Application granted granted Critical
Publication of EP3029698B1 publication Critical patent/EP3029698B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches

Definitions

  • the invention relates to a metal casing for enclosing an electrical power switching device which is traversed by a nominal current inducing a return current flowing in the wall of the casing and tending to heat it.
  • Such an installation typically corresponds to the case of a current generator circuit breaker associated with a power generation unit such as a power plant, which can be thermal, nuclear or other.
  • Such a generator circuit breaker is then interposed between the production unit which supplies a large current under a relatively low voltage, and one or more step-up transformers. Voltage rise limits online losses for power transmission.
  • the circuit breaker is connected upstream and downstream to sets of conductor bars. It is mounted in an aluminum casing which is itself connected to metal ducts surrounding each conductor bar connected to the circuit breaker.
  • the internal space delimited by the casing and the ducts is filled with slightly pressurized air to prevent dust or other particles from entering this space.
  • the nominal current flowing in the bars is an alternating current of high intensity, it gives rise, by induction effect, to the establishment of a so-called return current flowing in the sheaths and in the envelope of the circuit breaker, in the direction inverse of the nominal current.
  • the document FR2939560 discloses a metal casing for an electrical switching device according to the preamble of claim 1.
  • an external pipe 6 equipped with an external radiator 7, in which circulates the gas present in the chamber to cool it.
  • the casing is equipped with external conductive bars 52 connected to each end of the casing, so that in case of appearance of currents of Foucault, these are shared between the bars and the envelope, to limit the current flowing in this envelope.
  • the object of the invention is thus to provide a simple solution for improving the cooling of the internal space of such an envelope
  • the invention relates to a metal casing for an electrical switching device such as a circuit breaker or disconnector according to claim 1.
  • the cooling is improved because the double wall that constitutes the flank with the outer wall that runs alongside it the passage of the return flow outwardly in the outer wall, so that it does not heat the casing body.
  • the invention also relates to an envelope as defined by the dependent claims 2-5.
  • the double wall is thus the seat of a flow of air established by natural convection to cool the outer wall and the sidewall.
  • the outer wall traversed by the return current is thus cooled at its inner face and at its outer face which is directly in contact with the external environment.
  • the envelope according to the invention which is indicated by 1 in the figures contains a switchgear which is here a circuit breaker 2 which is connected to a first conducting bar 3 and a second conducting bar 4.
  • the first conductive bar 3 is surrounded by a metal sheath 6, and the second conductive bar 4 is surrounded by another metal sheath, marked by 7.
  • These two sheaths 6 and 7 are tubular and are both sealingly connected to the Envelope 1 enclosing the circuit breaker.
  • the first bar 3 is connected to a circuit breaker connector located at one of its ends by a set of metal braids 8.
  • the second bar 4 is connected to another contactor of the circuit-breaker by another set of metal braids 9.
  • the casing 1 which is made of aluminum has a generally parallelepiped shape delimited by a parallelepiped body 11 corresponding to its lower portion and whose open upper face is closed by a rectangular lid 12 reported.
  • the casing body 11 thus comprises a bottom 13, two lateral flanks 14 and 16, as well as a front wall 17 and a rear wall 18.
  • the front wall 17 has a central opening, visible more clearly on the figure 4 , and which is crossed by the first bar 3, the first sheath 6 having its end welded to the outer face of this front face, all around the opening.
  • the rear wall 18 has a central opening through which the second bar 4 passes, the second sheath 7 being welded at its end to this rear wall.
  • the first bar 3, the circuit breaker 2 and the second bar 4 are aligned in a main direction AX horizontal.
  • This direction AX corresponds to the direction of passage of the nominal current through the circuit breaker and the direction of passage of the return current through the sheaths and the envelope 1 in the opposite direction.
  • the lateral flank 14 has a first slot 19 located in the region of its front end, and extending from bottom to top in this flank 14, perpendicular to the axis AX.
  • This sidewall 14 has at its opposite end, that is to say in the region of its rear end, another slot 21 of the same type extending from bottom to top being located in the rear region of this sidewall.
  • the two slots 19 and 21 which each constitute an artifice opposing the passage of current, that is to say that they offer a significant electrical resistance to very significantly reduce the electrical intensity of the current flowing in the sidewall.
  • slots 19 and 21 are closed by seals 22 and 23 electrically insulating and which are sealed to ensure the tightness of the sheath.
  • the flank 14 which is plane carries an outer wall 24, generally flat and rectangular, having substantially the same length and the same height as the flank 14 which carries it. It runs along the outer face of the sidewall 14 being spaced from this outer face.
  • This wall 24 extends beyond the slots 19 and 21 that it covers, and is fixed by welding, or even by bolting, of two of its opposite edges to each end of the flank 14.
  • the opposite edges of the outer wall 24 through which this wall is fixed, are those which extend vertically when the envelope is installed.
  • flank 16 also has two slots, and it also carries another external wall 26 in the same arrangement as for the sidewall 14.
  • each flank thus has a much higher electrical resistance than the outer wall that it carries.
  • the return current flowing through the casing 1 passes through mainly the outer walls 24 and 26 of this envelope instead of crossing the sides 14 and 16 of this envelope.
  • the space E which is delimited by the outer wall 24 and the flank 14 carrying this wall, is open at the bottom and at the top to the outside.
  • the lower opening, marked by 27 corresponds to the spacing between the lower horizontal edge of the wall 24 and the outer face of the sidewall 14.
  • the upper opening, marked by 28 corresponds to the spacing between the upper horizontal edge of the wall 24 and the outer face of the sidewall 14.
  • the outer wall 26 and the flank 16 which carries it define a lower opening and an upper opening 31 and 32 to promote the circulation of cooling air.
  • the return current which tends to heat the conductors it passes preferably passes through the outer walls 24 and 26 instead of passing through the flanks 14 and 16 which are part of the casing body.
  • the passage of the current in the sidewalls is reduced by means of two devices in the form of slots provided in each sidewall. But it is possible to provide a single vertical slot located for example in the central region, which may be sufficient to limit the intensity of the current flowing in the sidewall.
  • These devices may also be in the form of portions of the electrically insulating flank not necessarily having the form of slots: the central region of the sidewall may for example be made of electrically insulating material.
  • the envelope according to the invention contains a circuit breaker, but it can be used to contain other types of electrical switches such as a disconnector, an earthing switch, or other.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention concerne une enveloppe métallique destinée à renfermer un dispositif de commutation électrique de puissance qui est traversé par un courant nominal induisant un courant de retour circulant dans la paroi de l'enveloppe et tendant à l'échauffer.The invention relates to a metal casing for enclosing an electrical power switching device which is traversed by a nominal current inducing a return current flowing in the wall of the casing and tending to heat it.

ÉTAT DE LA TECHNIQUE ANTÉRIEURESTATE OF THE PRIOR ART

Une telle installation correspond typiquement au cas d'un disjoncteur de générateur de courant associé à une unité de production de courant électrique telle qu'un centrale électrique, pouvant être thermique, nucléaire ou autre.Such an installation typically corresponds to the case of a current generator circuit breaker associated with a power generation unit such as a power plant, which can be thermal, nuclear or other.

Un tel disjoncteur de générateur est alors interposé entre l'unité de production qui fournit un courant important sous une tension relativement faible, et un ou des transformateurs élévateurs de tension. L'élévation de tension permet de limiter les pertes en ligne pour le transport d'électricité.Such a generator circuit breaker is then interposed between the production unit which supplies a large current under a relatively low voltage, and one or more step-up transformers. Voltage rise limits online losses for power transmission.

Dans une telle installation, le disjoncteur est raccordé en amont et en aval à des jeux de barres conducteurs. Il est monté dans une enveloppe en aluminium qui est elle-même raccordée à des gaines métalliques entourant chaque barre conductrice connectée au disjoncteur.In such an installation, the circuit breaker is connected upstream and downstream to sets of conductor bars. It is mounted in an aluminum casing which is itself connected to metal ducts surrounding each conductor bar connected to the circuit breaker.

L'espace interne délimité par l'enveloppe et les gaines est rempli d'air légèrement pressurisé pour éviter que des poussières ou autres particules ne pénètrent à l'intérieur de cet espace.The internal space delimited by the casing and the ducts is filled with slightly pressurized air to prevent dust or other particles from entering this space.

Le courant nominal circulant dans les barres étant un courant alternatif d'intensité élevée, il donne lieu par effet d'induction à l'établissement d'un courant dit de retour qui circule dans les gaines et dans l'enveloppe du disjoncteur, en sens inverse du courant nominal.Since the nominal current flowing in the bars is an alternating current of high intensity, it gives rise, by induction effect, to the establishment of a so-called return current flowing in the sheaths and in the envelope of the circuit breaker, in the direction inverse of the nominal current.

D'une manière générale, on ne cherche pas à éviter l'apparition de ce courant de retour, car il contribue à réduire l'intensité du champ magnétique s'établissant dans l'installation. Ce courant de retour permet ainsi de limiter les phénomènes de corrosion auxquels donnerait lieu un champ magnétique trop important.In general, it is not sought to avoid the appearance of this return current, because it helps to reduce the intensity of the magnetic field established in the installation. This return current thus makes it possible to limit the corrosion phenomena to which an excessive magnetic field would give rise.

Néanmoins, ce courant de retour chauffe l'enveloppe par effet Joule, ainsi que l'espace interne renfermant le disjoncteur, alors que la température du disjoncteur doit rester inférieure à une valeur prédéterminée pour assurer un fonctionnement normal.Nevertheless, this return current heats the envelope by Joule effect, as well as the internal space containing the circuit breaker, while the temperature of the circuit breaker must remain below a predetermined value to ensure normal operation.

A titre d'ordre de grandeur, la température d'un tel disjoncteur doit rester inférieure à cent cinq degrés Celcius lorsque la température extérieure est de quarante degrés Celcius. Le document FR2939560 divulgue une enveloppe métallique pour dispositif de commutation électrique conformément au préambule de la revendication 1. Dans le document FR2939560 , on prévoit une canalisation externe 6 équipée d'un radiateur externe 7, dans laquelle circule le gaz présent dans l'enceinte pour la refroidir. Dans le document US3711622 l'enveloppe est équipée de barres conductrices externes 52 connectées à chaque extrémité de l'enveloppe, de sorte qu'en cas d'apparition de courants de Foucault, ceux-ci se partagent entre les barres et l'enveloppe, pour limiter le courant circulant dans cette enveloppe.As an order of magnitude, the temperature of such a circuit breaker must remain below one hundred and five degrees Celsius when the outside temperature is forty degrees Celsius. The document FR2939560 discloses a metal casing for an electrical switching device according to the preamble of claim 1. In the document FR2939560 , there is provided an external pipe 6 equipped with an external radiator 7, in which circulates the gas present in the chamber to cool it. In the document US3711622 the casing is equipped with external conductive bars 52 connected to each end of the casing, so that in case of appearance of currents of Foucault, these are shared between the bars and the envelope, to limit the current flowing in this envelope.

D'une manière générale, les solutions connues compliquent significativement la structure générale associée à l'enceinte, induisant notamment un coût d'intégration élevé.In general, the known solutions significantly complicate the general structure associated with the enclosure, in particular inducing a high integration cost.

L'objet de l'invention est ainsi d'apporter une solution simple pour améliorer le refroidissement de l'espace interne d'une telle enveloppeThe object of the invention is thus to provide a simple solution for improving the cooling of the internal space of such an envelope

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

L'invention a pour objet une enveloppe métallique pour dispositif de commutation électrique tel qu'un disjoncteur ou un sectionneur conformément à la revendication 1. Le refroidissement est amélioré du fait que la double paroi que constitue le flanc avec la paroi externe qui le longe force le passage du courant de retour vers l'extérieur dans la paroi externe, pour qu'il ne réchauffe pas le corps d'enveloppe.The invention relates to a metal casing for an electrical switching device such as a circuit breaker or disconnector according to claim 1. The cooling is improved because the double wall that constitutes the flank with the outer wall that runs alongside it the passage of the return flow outwardly in the outer wall, so that it does not heat the casing body.

L'invention concerne également une enveloppe telle que définie par les revendications dépendantes 2-5. La double paroi est ainsi le siège d'un flux d'air s'établissant par convection naturelle pour refroidir la paroi externe et le flanc. La paroi externe traversée par le courant de retour est ainsi refroidie au niveau de sa face interne et au niveau de sa face externe qui est directement au contact de l'environnement externe.The invention also relates to an envelope as defined by the dependent claims 2-5. The double wall is thus the seat of a flow of air established by natural convection to cool the outer wall and the sidewall. The outer wall traversed by the return current is thus cooled at its inner face and at its outer face which is directly in contact with the external environment.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

  • La figure 1 est une vue en coupe latérale d'une enveloppe selon l'invention installée et renfermant un disjoncteur raccordé à deux barres conductrices sous gaines ;The figure 1 is a side sectional view of an envelope according to the invention installed and enclosing a circuit breaker connected to two conductive bars in sheaths;
  • La figure 2 est une vue en coupe de dessus d'une enveloppe selon l'invention installée et renfermant un disjoncteur raccordé à deux barres conductrices sous gaines ;The figure 2 is a sectional view from above of an envelope according to the invention installed and containing a circuit breaker connected to two busbars under sheaths;
  • La figure 3 est une vue de détail d'un joint d'étanchéité d'un artifice de l'enveloppe selon l'invention ;The figure 3 is a detailed view of a seal of a device of the envelope according to the invention;
  • La figure 4 est une vue de face de l'enveloppe selon l'invention installée représentée seule.The figure 4 is a front view of the envelope according to the invention shown alone.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

L'enveloppe selon l'invention qui est repérée par 1 dans les figures renferme un appareillage de commutation qui est ici un disjoncteur 2 qui est raccordé à une première barre conductrice 3 et à une seconde barre conductrice 4.The envelope according to the invention which is indicated by 1 in the figures contains a switchgear which is here a circuit breaker 2 which is connected to a first conducting bar 3 and a second conducting bar 4.

La première barre conductrice 3 est entourée par une gaine métallique 6, et la seconde barre conductrice 4 est entourée par une autre gaine métallique, repérée par 7. Ces deux gaines 6 et 7 sont tubulaires et sont toutes deux raccordées de manière étanche à l'enveloppe 1 renfermant le disjoncteur.The first conductive bar 3 is surrounded by a metal sheath 6, and the second conductive bar 4 is surrounded by another metal sheath, marked by 7. These two sheaths 6 and 7 are tubular and are both sealingly connected to the Envelope 1 enclosing the circuit breaker.

La première barre 3 est raccordée à un connecteur du disjoncteur situé à l'une de ses extrémités par un ensemble de tresses métalliques 8. La seconde barre 4 est raccordée à un autre contacteur du disjoncteur par un autre ensemble de tresses métalliques 9.The first bar 3 is connected to a circuit breaker connector located at one of its ends by a set of metal braids 8. The second bar 4 is connected to another contactor of the circuit-breaker by another set of metal braids 9.

L'enveloppe 1 qui est fabriquée en aluminium a une forme généralement parallélépipédique délimitée par un corps parallélépipédique 11 correspondant à sa portion inférieure et dont la face supérieure ouverte est fermée par un couvercle rectangulaire 12 rapporté.The casing 1 which is made of aluminum has a generally parallelepiped shape delimited by a parallelepiped body 11 corresponding to its lower portion and whose open upper face is closed by a rectangular lid 12 reported.

Le corps d'enveloppe 11 comporte ainsi un fond 13, deux flancs latéraux 14 et 16, ainsi qu'une paroi avant 17 et une paroi arrière 18.The casing body 11 thus comprises a bottom 13, two lateral flanks 14 and 16, as well as a front wall 17 and a rear wall 18.

La paroi avant 17 comporte une ouverture centrale, visible plus clairement sur la figure 4, et qui est traversée par la première barre 3, la première gaine 6 ayant son extrémité soudée à la face externe de cette face avant, tout autour l'ouverture.The front wall 17 has a central opening, visible more clearly on the figure 4 , and which is crossed by the first bar 3, the first sheath 6 having its end welded to the outer face of this front face, all around the opening.

De manière analogue, la paroi arrière 18 comporte une ouverture centrale traversée par la deuxième barre 4, la deuxième gaine 7 étant soudée par son extrémité à cette paroi arrière.Similarly, the rear wall 18 has a central opening through which the second bar 4 passes, the second sheath 7 being welded at its end to this rear wall.

Ainsi, et comme il ressort notamment des figures 1 et 2, la première barre 3, le disjoncteur 2 et la deuxième barre 4 sont alignés selon une direction principale AX horizontale. Cette direction AX correspond à la direction de passage du courant nominal traversant le disjoncteur et à la direction de passage du courant de retour traversant les gaines et l'enveloppe 1 en sens inverse.Thus, and as is clear from the Figures 1 and 2 , the first bar 3, the circuit breaker 2 and the second bar 4 are aligned in a main direction AX horizontal. This direction AX corresponds to the direction of passage of the nominal current through the circuit breaker and the direction of passage of the return current through the sheaths and the envelope 1 in the opposite direction.

Comme visible dans la figure 1, le flanc latéral 14 comporte une première fente 19 située dans la région de son extrémité avant, et s'étendant de bas en haut dans ce flanc 14, perpendiculairement à l'axe AX. Ce flanc 14 comporte à son extrémité opposée, c'est-à-dire dans la région de son extrémité arrière, une autre fente 21 du même type s'étendant de bas en haut en étant située en région arrière de ce flanc.As visible in the figure 1 , the lateral flank 14 has a first slot 19 located in the region of its front end, and extending from bottom to top in this flank 14, perpendicular to the axis AX. This sidewall 14 has at its opposite end, that is to say in the region of its rear end, another slot 21 of the same type extending from bottom to top being located in the rear region of this sidewall.

Les deux fentes 19 et 21 qui constituent chacune un artifice s'opposant au passage de courant, c'est-à-dire qu'elles offrent une résistance électrique importante visant à réduire très significativement l'intensité électrique du courant circulant dans le flanc.The two slots 19 and 21 which each constitute an artifice opposing the passage of current, that is to say that they offer a significant electrical resistance to very significantly reduce the electrical intensity of the current flowing in the sidewall.

Ces fentes s'étendent ainsi l'une et l'autre verticalement dans le flanc 14 lorsque l'enveloppe est installée comme dans la figure 1, de sorte qu'elles sont orientées perpendiculairement à la direction de passage du courant. Les fentes 19 et 21 sont fermées par des joints 22 et 23 électriquement isolants et qui sont étanches pour assurer l'étanchéité de la gaine.These slots both extend vertically in the sidewall 14 when the envelope is installed as in the figure 1 so that they are oriented perpendicular to the current flow direction. The slots 19 and 21 are closed by seals 22 and 23 electrically insulating and which are sealed to ensure the tightness of the sheath.

Complémentairement, le flanc 14 qui est plan porte une paroi externe 24, généralement plane et rectangulaire, ayant sensiblement la même longueur et la même hauteur que ce flanc 14 qui la porte. Elle longe la face extérieure du flanc 14 en étant espacée de cette face extérieure.Complementarily, the flank 14 which is plane carries an outer wall 24, generally flat and rectangular, having substantially the same length and the same height as the flank 14 which carries it. It runs along the outer face of the sidewall 14 being spaced from this outer face.

Cette paroi 24 s'étend au-delà des fentes 19 et 21 qu'elle couvre, et elle est fixée par soudage, voire par boulonnage, de deux de ses bords opposés à chaque extrémité du flanc 14. Les bords opposés de la paroi externe 24 par lesquels cette paroi est fixée, sont ceux qui s'étendent verticalement lorsque l'enveloppe est installée.This wall 24 extends beyond the slots 19 and 21 that it covers, and is fixed by welding, or even by bolting, of two of its opposite edges to each end of the flank 14. The opposite edges of the outer wall 24 through which this wall is fixed, are those which extend vertically when the envelope is installed.

Comme visible sur la figure 2, ces bords opposés de la paroi 14 sont repliés pour former des décrochements en retrait par rapport au corps de la paroi externe 24. Le corps de paroi externe 24 est ainsi espacé de la face externe d'une distance correspondant à l'épaisseur des décrochements que constituent les bords par lesquels cette paroi externe est fixée.As visible on the figure 2 these opposite edges of the wall 14 are folded to form recesses recessed relative to the body of the outer wall 24. The outer wall body 24 is thus spaced from the outer face by a distance corresponding to the thickness of the recesses. that constitute the edges by which this external wall is fixed.

De manière analogue, le flanc 16 comporte lui aussi deux fentes, et il porte également une autre paroi externe 26 selon la même disposition que pour le flanc 14.Similarly, the flank 16 also has two slots, and it also carries another external wall 26 in the same arrangement as for the sidewall 14.

Les fentes formées dans chaque flanc constituent des artifices s'opposant au passage du courant de retour : chaque flanc présente ainsi une résistance électrique beaucoup plus élevée que la paroi externe qu'il porte.The slots formed in each flank constitute devices opposing the passage of the return current: each flank thus has a much higher electrical resistance than the outer wall that it carries.

Ainsi, le courant de retour qui parcourt l'enveloppe 1 traverse majoritairement les parois externes 24 et 26 de cette enveloppe au lieu de traverser les flancs 14 et 16 de cette enveloppe.Thus, the return current flowing through the casing 1 passes through mainly the outer walls 24 and 26 of this envelope instead of crossing the sides 14 and 16 of this envelope.

Complémentairement, et comme visible sur la figure 4, l'espace E qui est délimité par la paroi externe 24 et par le flanc 14 portant cette paroi, est ouvert en partie basse et en partie haute vers l'extérieur.Complementarily, and as visible on the figure 4 , the space E which is delimited by the outer wall 24 and the flank 14 carrying this wall, is open at the bottom and at the top to the outside.

L'ouverture inférieure, repérée par 27 correspond à l'espacement entre le bord horizontal inférieur de la paroi 24 et la face externe du flanc 14. De la manière analogue, l'ouverture supérieure, repérée par 28 correspond à l'espacement entre le bord horizontal supérieur de la paroi 24 et la face externe du flanc 14.The lower opening, marked by 27 corresponds to the spacing between the lower horizontal edge of the wall 24 and the outer face of the sidewall 14. In the same way, the upper opening, marked by 28 corresponds to the spacing between the upper horizontal edge of the wall 24 and the outer face of the sidewall 14.

De la même manière, la paroi externe 26 et le flanc 16 qui la porte délimitent une ouverture inférieure et une ouverture supérieure 31 et 32 pour favoriser la circulation d'air de refroidissement.In the same way, the outer wall 26 and the flank 16 which carries it define a lower opening and an upper opening 31 and 32 to promote the circulation of cooling air.

La combinaison des artifices s'opposant au passage du courant de retour que constituent les fentes formées dans les flancs, avec les parois externes favorisant au contraire le passage du courant de retour, le refroidissement de l'enveloppe est significativement accru.The combination of devices opposing the passage of the return current formed by the slots formed in the flanks, with the outer walls favoring the passage of the return current, the cooling of the casing is significantly increased.

En effet, le courant de retour qui tend à échauffer les conducteurs qu'il parcourt passe préférentiellement par les parois externes 24 et 26 au lieu de passer par les flancs 14 et 16 qui font partie du corps d'enveloppe.Indeed, the return current which tends to heat the conductors it passes preferably passes through the outer walls 24 and 26 instead of passing through the flanks 14 and 16 which are part of the casing body.

Dans ces conditions, une très grande partie du courant de retour ne réchauffe pas directement le corps d'enveloppe qui peut ainsi rester à une température plus faible.Under these conditions, a very large part of the return current does not heat the envelope body directly, which can thus remain at a lower temperature.

Mais de plus, l'espace qui est conservé entre chaque paroi externe et chaque flanc qui la porte, et les ouvertures supérieure et inférieure correspondantes favorise la circulation d'air extérieur de bas en haut dans cet espace.But in addition, the space that is kept between each outer wall and each side that carries it, and the upper and lower openings This allows the outside air circulation up and down in this space.

Cette circulation d'air qui s'établit par convection naturelle du fait du réchauffement de la paroi externe par effet Joule résultant du passage du courant de retour, permet de refroidir la paroi externe 24 mais également le flanc 14. Comme on l'aura compris, le même refroidissement par convection naturelle s'établit entre le flanc 16 et la paroi 26 qu'il porte.This circulation of air which is established by natural convection due to the heating of the outer wall by Joule effect resulting from the passage of the return current, allows to cool the outer wall 24 but also the sidewall 14. As will be understood , the same natural convection cooling is established between the flank 16 and the wall 26 that it carries.

Dans l'exemple des figures, le passage du courant dans les flancs est réduit au moyen de deux artifices sous forme de fentes prévus dans chaque flanc. Mais il est possible de prévoir une seule fente verticale située par exemple en région centrale, ce qui peut suffire à limiter l'intensité du courant circulant dans le flanc.In the example of the figures, the passage of the current in the sidewalls is reduced by means of two devices in the form of slots provided in each sidewall. But it is possible to provide a single vertical slot located for example in the central region, which may be sufficient to limit the intensity of the current flowing in the sidewall.

Ces artifices peuvent aussi se présenter sous forme de portions du flanc électriquement isolantes n'ayant pas nécessairement la forme de fentes : la région centrale du flanc peut par exemple être fabriquée en matériau électriquement isolant.These devices may also be in the form of portions of the electrically insulating flank not necessarily having the form of slots: the central region of the sidewall may for example be made of electrically insulating material.

Par ailleurs, dans l'exemple des figures, l'enveloppe selon l'invention renferme un disjoncteur, mais elle peut être utilisée pour contenir d'autres types de commutateurs électriques comme par exemple un sectionneur, un sectionneur de mise à la terre, ou autre.Furthermore, in the example of the figures, the envelope according to the invention contains a circuit breaker, but it can be used to contain other types of electrical switches such as a disconnector, an earthing switch, or other.

Claims (5)

  1. Metal shell (1) for electrical switchgear such as a circuit breaker (2) or a disconnect switch which is intended to be connected to two conductors (3, 4) under a metal sheath (6, 7) through which passes a nominal current flowing according to a direction of passage (AX), with this shell (1) being passed through by a return current induced by the nominal current and flowing in the opposite direction according to the direction of passage (AX), characterised in that this shell (1) comprises:
    - a shell body (11) including at least one lateral flank (14, 16) provided with at least one through-slot of an artifice (19, 21) extending perpendicularly to the direction of passage of current in order to oppose the passage of the return current in this lateral flank (14, 16) by offering an electrical resistance aiming to reduce the electrical intensity of the current flowing in the flank (14, 16);
    - an outer wall (24, 26) passing along each flank (14, 16) provided with at least one slot (19, 21) and spaced from the latter while still being connected to the shell body (11) upstream and downstream of the at least one slot (19, 21) in relation to the direction of passage of the current, with each outer wall (24, 26) offering the return current an electrical resistance that is less than the flank (14, 16) with at least one slot (19, 21) that it passes along.
  2. Shell according to claim 1, further comprising for each flank (14, 16) provided with at least one slot (19, 21) and along which passes an outer wall (24, 26), a first opening (28, 32) and a second opening (27, 31) located respectively in the top portion and in the bottom portion of the shell in service in order to place in communication the space separating the flank (14, 16) from the outer wall (24, 26) borne by this flank with the external environment in such a way as to allow for a circulation of cooling air in this space.
  3. Shell according to claim 3 comprising a seal (22, 23) made of a non-conducting material closing each slot (19, 21).
  4. Shell according to claim 3 or 4, of which each flank (14, 16) comprises two slots spaced from one another along the direction of passage of the current.
  5. Shell according to one of the preceding claims, wherein each outer wall (24, 26) is borne by a flank (14, 16) provided with at least one slot (19, 21), by being fastened by welding to the flank (14, 16) which bears it on either side of the at least one slot (19, 21) that this flank (14, 16) comprises.
EP15197293.2A 2014-12-02 2015-12-01 Metal shell for electrical switching device Active EP3029698B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1461798A FR3029346B1 (en) 2014-12-02 2014-12-02 METAL ENVELOPE FOR ELECTRICAL SWITCHING DEVICE

Publications (2)

Publication Number Publication Date
EP3029698A1 EP3029698A1 (en) 2016-06-08
EP3029698B1 true EP3029698B1 (en) 2018-05-02

Family

ID=52737226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15197293.2A Active EP3029698B1 (en) 2014-12-02 2015-12-01 Metal shell for electrical switching device

Country Status (2)

Country Link
EP (1) EP3029698B1 (en)
FR (1) FR3029346B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE348794C (en) * 1922-02-18 Siemens Schuckertwerke G M B H Housing closed on all sides for electrical apparatus
US3711622A (en) * 1972-03-03 1973-01-16 Gen Electric Means for reducing eddy current heating of a tank in electrical apparatus
FR2846142B1 (en) * 2002-10-16 2004-12-24 Alstom DEVICE COOLING DEVICE UNDER SHEATH
FR2872336B1 (en) * 2004-06-29 2007-07-20 Areva T & D Sa PASSIVE COOLING DEVICE FOR ELECTRICAL EQUIPMENT AND ELECTRICAL EQUIPMENT COMPRISING SAID DEVICE
FR2939560B1 (en) * 2008-12-05 2011-12-09 Areva T & D Sa METHOD AND APPARATUS FOR COOLING THE INTERIOR OF A HIGH AMPERAGE DISCONNECT SWITCH ASSEMBLY
ATE517425T1 (en) * 2009-02-13 2011-08-15 Abb Technology Ag COOLING DEVICE IN AN ELECTRICAL COMPONENT OF A HIGH-VOLTAGE SYSTEM WITH A HEAT PIPE AND METHOD FOR PRODUCING THE COOLING DEVICE
CN104170195B (en) * 2012-01-19 2017-05-03 海德罗-魁北克公司 Device for outdoor switch equipment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3029346A1 (en) 2016-06-03
FR3029346B1 (en) 2018-03-09
EP3029698A1 (en) 2016-06-08

Similar Documents

Publication Publication Date Title
EP1703611A1 (en) Electrical feedthrough for superconducting element
FR3003407A1 (en) ELECTRICAL ENVELOPE WITH IMPROVED MECHANICAL ARRANGEMENT
EP3029698B1 (en) Metal shell for electrical switching device
EP0935264B1 (en) Current transformer for a gas-insulated switch installation
EP0020215B1 (en) Induction reheating furnace with travelling field
EP0277848B1 (en) Multiphase circuit breaker with self-expansion having per phase a gas-insulated arc extinguishing chamber
FR2668851A1 (en) MULTIPOLAR ROTARY SWITCH.
EP1122848B1 (en) Improved device protecting against internal faults in a three-phase transformer
EP2633538B1 (en) Electrical apparatus in a metal case said apparatus comprising at least one corona-shield cap ensuring convective exchange
FR2879016A1 (en) ELECTRICAL CUTTING DEVICE WITH RECYCLING OF CUTTING GASES
EP1612823B1 (en) Passive cooling device for an electrical apparatus and apparatus having such a device
EP2538493B1 (en) Electrical connection device between at least one conductor and at least one connecting pad of an electrical appliance, respectively, and electrical appliance comprising same
EP3336983A1 (en) Low voltage electrical distribution installation
CA2418489A1 (en) Seal wire with gas-tight metallic covering
FR2833769A1 (en) Electric current transformer post design arrangement, has control units mechanically actuating manoeuvring units and connectors to the electric network
FR2472861A1 (en) DEVICE FOR SAFETY AGAINST ELECTRIC ARCS
FR2525807A1 (en) CIRCUIT BREAKER WITH CURRENT TRANSFORMER INCORPORATES
EP3032561B1 (en) Electric switch arrangement
JP2010016934A (en) Gas-insulated switchgear
FR3029349A1 (en) COOLING ARRANGEMENT OF A SAGING SWITCHING DEVICE
EP1195871B1 (en) Polyphase gas insulated line and coupling module for a polyphase/monophase lead-through in such a line
WO2010012803A1 (en) Electrical conductor with improved cooling and switching device in a sealed casing comprising at least one such conductor
EP2410626A1 (en) Gas-insulated electric power transmission line
EP0076208A1 (en) Transformer, especially of the explosion-proof type
FR2921524A1 (en) Average/high voltage electrical energy distribution panel, has envelope extended above bar assembly and designed such that bars remain confined in dry portion of cavity, where cavity is sealingly closed towards top and opened towards bottom

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20160722

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170714

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180123

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 996103

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180515

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602015010636

Country of ref document: DE

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602015010636

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180502

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180802

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180802

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180803

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 996103

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602015010636

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181201

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20181231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20151201

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180502

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180902

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191201

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230522

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231122

Year of fee payment: 9

Ref country code: DE

Payment date: 20231121

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20240101

Year of fee payment: 9