EP1054419B1 - High tension isolating switch with a mobile contact movable at high speed - Google Patents

High tension isolating switch with a mobile contact movable at high speed

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Publication number
EP1054419B1
EP1054419B1 EP00401303A EP00401303A EP1054419B1 EP 1054419 B1 EP1054419 B1 EP 1054419B1 EP 00401303 A EP00401303 A EP 00401303A EP 00401303 A EP00401303 A EP 00401303A EP 1054419 B1 EP1054419 B1 EP 1054419B1
Authority
EP
European Patent Office
Prior art keywords
contact
piston
spring
disconnector
fixed
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.)
Expired - Lifetime
Application number
EP00401303A
Other languages
German (de)
French (fr)
Other versions
EP1054419A1 (en
Inventor
Olivier Chuniaud
Henri Jouard
Jean Marmonier
Bernard Regnier
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.)
Grid Solutions SAS
Original Assignee
Areva T&D SAS
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 Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP1054419A1 publication Critical patent/EP1054419A1/en
Application granted granted Critical
Publication of EP1054419B1 publication Critical patent/EP1054419B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs

Definitions

  • the invention relates to an electrical disconnector comprising a first contact which is mounted movably in an axial direction with respect to a second fixed contact and which cooperates with the latter to establish an electrical connection, a rod which extends in said axial direction and which is maneuvered to move the first contact relative to the second contact.
  • a high voltage electrical disconnector comprising a metal casing in which are arranged the movable and fixed contacts, this envelope being filled with a dielectric gas such as SF6.
  • the operating rod of the movable contact passes through the metal casing and is usually moved in translation by a mechanical control.
  • the patent application EP348645 discloses a two-contact disconnector formed by two coaxial cylinders and moved to connect successively to a fixed arc contact and to a fixed permanent contact (ensuring the passage of the permanent current).
  • the movable contact control mechanism uses two aligned coil springs, separated by a collar attached to an operating rod which is coaxial with them.
  • the disconnector arrangement disclosed allows a speed of movement of the movable contacts much faster than that of the operating rod during closing operations or opening of the electrical connection.
  • the device cited because of the disposition of its fixed contacts, does not allow electric arcs to start only on the fixed arcing contact. Indeed, the isolation distance between the moving arc contact and the fixed permanent contact may become insufficient if the voltage exceeds a certain threshold, in which case it may occur arcing between these contacts, where damaging overvoltages because not attenuated by possible resistances.
  • the subject of the invention is an electrical disconnector comprising a first contact which is mounted movably in an axial direction relative to a second fixed contact and which cooperates with the latter to establish a electrical connection, a rod which extends in said axial direction and which is operated to move the movable contact relative to the fixed contact, characterized in that the movable contact is a hollow tube having an end facing the fixed contact and a second end opposite the first end, in that it comprises a piston sliding inside the movable contact, the piston being mounted on the rod and having a first side oriented towards the fixed contact and a second side opposite the first side, in that a first spring is interposed between the first end of the movable contact and the first side of the piston, in that a second spring is t interposed between the second end of the movable contact and the second side of the piston, in that a first locking system is provided for immobilizing the movable contact in the axial direction during a closing operation at the same time as the
  • This device allows in particular the rapid switching of high voltages while ensuring the passage of strong currents.
  • the electrical disconnector according to the invention is a high-voltage disconnector comprising, in a cylindrical metal casing (not shown in the drawings) which extends in an axial direction A and which is filled with an insulating gas such as SF6, a contact 1 which is fixed and which is for example hollow and a contact 2 mounted movably in the axial direction relative to the fixed contact.
  • the movable contact is for example rod-shaped, is coaxial with the fixed contact 1 and is inserted into the hollow fixed contact to establish an electrical connection.
  • the disconnector further comprises a rod 3 coaxial with the contacts 1 and 2, which extends in the axial direction A and which is operated to move the contact 2 relative to the contact 1.
  • the moving contact 2 is guided in displacement in the axial direction by a fixed tube 4 coaxial with the operating rod 3.
  • the movable contact 2 is a cylindrical hollow tube having a first end 2A which faces the fixed contact 1 and a second end 2B opposite the end 2A traversed by the operating rod 3.
  • a piston 5 is arranged sliding inside the contact 2; it has a first side 5A facing the contact side 1 and a second side 5B opposite the side 5A.
  • the piston 5 is fixed to the end of the rod 3 which slides in the contact 2.
  • the rod 3 may be a worm and the piston 5 can be in this case a nut.
  • the other end of the rod 3 is connected to the control of the disconnector (not shown) which acts here to move in translation the rod 3 in the axial direction A.
  • the control acts here to move the rod 3 and thus the piston 5 to the fixed contact 1 and during an opening operation of the disconnector, the control acts to move the rod 3 and thus the piston 5 in the opposite direction.
  • the disconnector further comprises a first locking system 8, of the retractable ball type, which immobilizes the contact 2 in the axial direction when the rod 3 is operated during a closing operation of the disconnector, at the same time as the first spring 6 is compressed between the piston and the first end 2A of the contact 2.
  • This first locking system is erased after a certain compression of the first spring 6 so that the contact 2 is connected at high speed with the contact 1 under the effect the relaxation of the spring 6 bearing against the piston 5.
  • the isolator further comprises a second locking system 9 which immobilizes the contact 2 in the axial direction when the rod 3 is operated during an opening operation of the disconnector, at the same time as the spring 7 is compressed between the piston 5 and the second end 2B of the contact 2.
  • This second locking system is erased after a certain compression of the spring 7 so that the contact 2 is disconnected from the contact 1 at high speed under the effect of the relaxation of the spring 7 in support against the piston 5.
  • the disconnector according to the invention is in the fully open position.
  • the spring 7 is compressed between the piston 5 and the end 2B of the contact 2.
  • the spring 6 is completely expanded between the end 2A of the contact 2 and the piston 5.
  • the contact 2 is immobilized in the axial direction A in the tube 4 by the retractable ball lock system 8 which is here armed.
  • the rod 3 is moved by a translational maneuver towards the fixed contact 1 as indicated by the arrow on the piston 5; it drives the piston 5 in this direction so that the spring 6 is compressed by the piston 5 against the end 2A of the contact 2 while the spring 7 is expanded.
  • the contact 2 is inserted at high speed in the fixed contact 1 under the action of the spring 6 which expands between the piston 5 and the end 2A of the contact 2.
  • the piston 5 continues to be moved towards the fixed contact 1 and the second ball lock system 9 is armed to immobilize the contact 2 in the axial direction A in the guide tube 4.
  • the moving contact 2 has therefore moved independently of the operating rod 3 and the piston 5.
  • the translational speed of the operating rod 3 and thus of the piston 5 can therefore be much smaller. that the speed of displacement of the movable contact 2.
  • the speed of displacement of the actuating rod 3 and therefore of the piston 5 can also be constant contrary to the speed of displacement of the movable contact 2.
  • the end of the closing operation of the disconnector can be controlled by detecting the extreme position of the piston 5 and the rod 3.
  • the rod 3 is moved away by the fixed contact 1 as indicated by the arrow on the piston 5; it drives the piston 5 in the same direction so that the spring 7 is compressed by the piston 5 against the end 2B of the contact 2 while the spring 6 is expanded.
  • the contact 2 emerges at high speed from the fixed contact 1 under the action of the spring 7 which expands between the piston 5 and the end 2B of the contact 2.
  • the piston 5 continues to be away from the contact fixed 1 and the first ball lock system 8 is armed to immobilize the contact 2 in the axial direction A in the guide tube 4.
  • the moving contact 2 has thus moved again independently of the operating rod 3 and the piston 5.
  • the end of the opening operation of the disconnector can be further controlled by the detection of the position extreme of the piston 5 and the rod 3.
  • Figure 3 shows in greater detail in longitudinal section in the axial direction to an embodiment of a disconnector according to the invention.
  • the operating rod 3 is a rotary worm with rotation axis A.
  • the piston 5 is a nut in which is engaged the worm 3. According to the direction of rotation of the worm 3, the nut 5 moves in translation (without possibility of rotation) in one direction or the other in the axial direction A inside the moving contact 2.
  • the spring 6 and the spring 7 with spirals.
  • FIG. 3 shows the disconnector in the fully open position, the spring 7 being compressed between the nut 5 and the end 2B of the movable contact 2.
  • a cylindrical spool 10 is disposed inside the contact 2 coaxially with the nut 5. This spool slides on the nut 5 and acts on retractable balls 8 and 9 locking systems housed in radial openings 11 of the contact 2 It consists more particularly of two half-drawers 10A and 10B independent of each other in displacement in the axial direction A.
  • the half-slide 10A comprises a radial end rib 12A on which the nut 5 comes into abutment when the latter is moved towards the fixed contact 1.
  • the half-slide 10B also comprises a radial end rib 12B on which the nut 5 comes into abutment when the latter is moved away from the fixed contact 1.
  • a spiral spring 13 is disposed between the end rib 12A of the half-slide 10A and a shoulder 2AA provided at the end 2A.
  • the guide tube 4 comprises a first recess 15 in which the ball 8 can engage and a second recess 16 into which the ball 9 can engage; these two recesses 15 and 16 are spaced apart from each other in the axial direction A.
  • the half-drawer 10A includes a first recess 17 in which can fade the ball 8 and the half-drawer 10B comprises a second obviously 18 in which can fade the ball 9; these two recesses 17 and 18 are spaced apart from one another in the axial direction A.
  • the ball 8 When the ball 8 is engaged in the recess 15 of the tube 4, it locks the displacement of the contact 2 in the axial direction A and when the rib 12A of the half-slide 10A is pushed by the nut 5 during the closing phase of the disconnector, the ball 8 comes in front of the recess 17 in which it can be erased to release the displacement of the movable contact 2. Moreover, when the ball 9 is engaged in the recess 16 of the tube 4, it locks the displacement of the contact 2 in the axial direction A and when the rib 12B of the half-slide 10B is pushed by the nut 5 during the opening phase of the disconnector, the ball 9 comes in front of the recess 18 in which it can fade to release the movement of the moving contact 2.
  • the fixed contact 1 ' is equipped with resistors R making it possible to obtain a particularly effective apparatus for protecting the connected equipment against transient overvoltages at very high frequencies when switchover of the disconnector on capacitive current.
  • the fixed contact 1 ' comprises an arc contact or cover 21 directly and only connected to resistors R. This cover has rounded corners providing a corona-shielding effect, and a slightly greater internal diameter to the diameter of the movable contact 2, so that the movable contact does not touch the cover at insertion.
  • the permanent contact 22 In order to also be able to switch high bus transfer currents without any risk of melting the contacts, the permanent contact 22 conventionally houses along its axis of symmetry a retractable arc contact 24 formed of a conducting rod coupled to a spring.
  • This rod also shown in the fixed contact 1 in Figure 3, is made of a material insensitive to heating, and can withstand a strong current at the moment when the movable contact 2 pushes it.
  • the heating produced is limited in that the connection of the movable contact to the permanent current contact 22 is carried out very shortly afterwards.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Description

L'invention porte sur un sectionneur électrique comprenant un premier contact qui est monté mobile suivant une direction axiale par rapport à un second contact fixe et qui coopère avec ce dernier pour établir une connexion électrique, une tige qui s'étend suivant ladite direction axiale et qui est manoeuvrée pour déplacer le premier contact par rapport au second contact.The invention relates to an electrical disconnector comprising a first contact which is mounted movably in an axial direction with respect to a second fixed contact and which cooperates with the latter to establish an electrical connection, a rod which extends in said axial direction and which is maneuvered to move the first contact relative to the second contact.

Elle s'applique plus particulièrement à un sectionneur électrique haute tension comprenant une enveloppe métallique dans laquelle sont disposés les contacts mobile et fixe, cette enveloppe étant remplie d'un gaz diélectrique comme le SF6. La tige de manoeuvre du contact mobile traverse de façon étanche l'enveloppe métallique et est déplacée habituellement en translation par une commande mécanique.It applies more particularly to a high voltage electrical disconnector comprising a metal casing in which are arranged the movable and fixed contacts, this envelope being filled with a dielectric gas such as SF6. The operating rod of the movable contact passes through the metal casing and is usually moved in translation by a mechanical control.

La demande de brevet EP348645 divulgue un sectionneur à deux contacts mobiles formés par deux cylindres coaxiaux et déplacés pour se connecter successivement à un contact d'arc fixe et à un contact permanent fixe (assurant le passage du courant permanent). Le mécanisme de commande des contacts mobiles utilise deux ressorts hélicoïdaux alignés, séparés par un collier fixé à une tige de manoeuvre qui leur est coaxiale. L'agencement de sectionneur divulgué permet d'avoir une vitesse de déplacement des contacts mobiles bien plus rapide que celle de la tige de manoeuvre pendant les opérations de fermeture ou d'ouverture de la connexion électrique.The patent application EP348645 discloses a two-contact disconnector formed by two coaxial cylinders and moved to connect successively to a fixed arc contact and to a fixed permanent contact (ensuring the passage of the permanent current). The movable contact control mechanism uses two aligned coil springs, separated by a collar attached to an operating rod which is coaxial with them. The disconnector arrangement disclosed allows a speed of movement of the movable contacts much faster than that of the operating rod during closing operations or opening of the electrical connection.

De façon générale, pendant la manoeuvre d'un sectionneur sur courant capacitif (de faible ampérage sous très forte tension), des arcs électriques se créent entre le contact mobile et le contact fixe, et génèrent des surtensions transitoires à très haute fréquences (de l'ordre du MHz) qui sont dommageables pour le matériel connecté. Plus un sectionneur est rapide, moins il va y avoir d'amorçages d'arcs. A cet effet, la demande de brevet citée utilise un contact d'arc mobile, déplacé à grande vitesse pour connecter ou déconnecter un contact d'arc fixe, lequel peut aussi être appelé contact de courant transitoire. Juste après la connexion de ces contacts d'arc, les contacts de courant permanent peuvent être rapprochés sans amorçage d'arc électrique et connectés.In general, during the operation of a capacitive current disconnector (low amperage under very high voltage), electric arcs are created between the movable contact and the fixed contact, and generate transient overvoltages at very high frequencies (for example). MHz order) that are harmful to the connected hardware. The faster a disconnector is, the less arcing starts. For this purpose, the cited patent application uses a moving arc contact, moved at high speed to connect or disconnect a fixed arc contact, which can also be called transient current contact. Just after the connection of these arcing contacts, the permanent current contacts can be brought together without arc ignition and connected.

Pour autant, la connexion en deux temps assurée par deux contacts mobiles dans un tel dispositif ne permet pas de faire face à certains problèmes:However, the two-step connection provided by two mobile contacts in such a device does not make it possible to face certain problems:

Tout d'abord, malgré la diminution du nombre d'amorçages d'arcs grâce à la vitesse élevée de commutation, il n'en reste pas moins que chaque front de montée en tension reste dommageable pour le matériel connecté. Pour réduire la pente et le niveau de ces fronts, il est connu d'utiliser des résistances connectées au contact d'arc fixe. Si le courant produit par l'amorçage d'arcs passe entièrement par ces résistances, les fronts sont considérablement amortis.First of all, despite the reduction in the number of arcing starts thanks to the high switching speed, the fact remains that each voltage rise edge remains damaging to the connected equipment. To reduce the slope and the level of these fronts, it is known to use resistors connected to the fixed arc contact. If the current produced by the arcing starts entirely by these resistances, the fronts are considerably damped.

Le dispositif cité, du fait de la disposition de ses contacts fixes, ne permet pas aux arcs électriques d'amorcer uniquement sur le contact d'arc fixe. En effet, la distance d'isolement entre le contact d'arc mobile et le contact permanent fixe peut devenir insuffisante si la tension dépasse un certain seuil, auquel cas il peut se produire des amorçages d'arcs entre ces contacts, d'où des surtensions dommageables car non atténuées par d'éventuelles résistances.The device cited, because of the disposition of its fixed contacts, does not allow electric arcs to start only on the fixed arcing contact. Indeed, the isolation distance between the moving arc contact and the fixed permanent contact may become insufficient if the voltage exceeds a certain threshold, in which case it may occur arcing between these contacts, where damaging overvoltages because not attenuated by possible resistances.

Ensuite, un tel dispositif à deux contacts mobiles implique le passage d'un courant transitoire en attendant que les contacts de courant permanent soient connectés. Du fait de la section limitée du contact mobile d'arc, le courant transitoire doit rester en dessous d'un seuil critique au delà duquel l'échauffement produit serait dommageable aux contacts d'arc, d'autant plus que la durée de ce courant est importante. Ce problème se pose particulièrement dans le cas de commutation du sectionneur sur courant de transfert de barre, où l'intensité peut atteindre des milliers d'Ampères.Then, such a device with two moving contacts involves the passage of a transient current until the permanent current contacts are connected. Due to the limited section of the movable arc contact, the transient current must remain below a critical threshold beyond which the heating produced would be harmful to the arcing contacts, especially as the duration of this current is important. This problem arises particularly in the case of switching the bar transfer current switch, where the intensity can reach thousands of amperes.

Afin de remédier aux inconvénients de l'état de la technique, l'invention a pour objet un sectionneur électrique comprenant un premier contact qui est monté mobile suivant une direction axiale par rapport à un second contact fixe et qui coopère avec ce dernier pour établir une connexion électrique, une tige qui s'étend suivant ladite direction axiale et qui est manoeuvrée pour déplacer le contact mobile par rapport au contact fixe, caractérisé en ce que le contact mobile est un tube creux ayant une extrémité qui fait face au contact fixe et une seconde extrémité opposée à la première extrémité, en ce qu'il comprend un piston coulissant à l'intérieur du contact mobile, le piston étant monté sur la tige et ayant un premier côté orienté du côté du contact fixe et un second côté opposé au premier côté, en ce qu'un premier ressort est interposé entre la première extrémité du contact mobile et le premier côté du piston, en ce qu'un second ressort est interposé entre la seconde extrémité du contact mobile et le second côté du piston, en ce qu'un premier système de verrouillage est prévu pour immobiliser le contact mobile suivant la direction axiale pendant une opération de fermeture en même temps que le premier ressort est comprimé entre le piston et la première extrémité du contact mobile, ce premier système de verrouillage s'effaçant après une certaine compression du premier ressort de telle façon que le contact mobile est connecté au contact fixe sous l'effet de la détente du premier ressort, et en ce qu'un second système de verrouillage est prévu pour immobiliser le contact mobile suivant la direction axiale pendant une opération d'ouverture en même temps que le second ressort est comprimé entre le piston et la seconde extrémité du contact mobile, ce second système de verrouillage s'effaçant après une certaine compression du second ressort de telle façon que le contact mobile est déconnecté du contact fixe sous l'effet de la détente du second ressort.In order to overcome the disadvantages of the state of the art, the subject of the invention is an electrical disconnector comprising a first contact which is mounted movably in an axial direction relative to a second fixed contact and which cooperates with the latter to establish a electrical connection, a rod which extends in said axial direction and which is operated to move the movable contact relative to the fixed contact, characterized in that the movable contact is a hollow tube having an end facing the fixed contact and a second end opposite the first end, in that it comprises a piston sliding inside the movable contact, the piston being mounted on the rod and having a first side oriented towards the fixed contact and a second side opposite the first side, in that a first spring is interposed between the first end of the movable contact and the first side of the piston, in that a second spring is t interposed between the second end of the movable contact and the second side of the piston, in that a first locking system is provided for immobilizing the movable contact in the axial direction during a closing operation at the same time as the first spring is compressed between the piston and the first end of the moving contact, this first locking system fading after a certain compression of the first spring so that the moving contact is connected to the fixed contact under the effect of the expansion of the first spring, and in that a second locking system is arranged to immobilize the movable contact in the axial direction during an opening operation at the same time as the second spring is compressed between the piston and the second end of the moving contact, this second locking system fading after some compression of the second spring such that the movable contact is disconnected from the fixed contact under the effect of the relaxation of the second spring.

Ce dispositif permet notamment la commutation rapide de hautes tensions tout en assurant le passage de forts courants.This device allows in particular the rapid switching of high voltages while ensuring the passage of strong currents.

D'autres caractéristiques et avantages apparaîtront encore mieux à la lecture de la description qui suit d'un exemple de réalisation d'un sectionneur selon l'invention illustré sur les dessins.

  • Les figures 1a à 1e illustrent de façon schématique le fonctionnement du sectionneur selon l'invention pendant une phase de fermeture de la connexion électrique.
  • Les figures 2a à 2e illustrent de façon schématique le fonctionnement du sectionneur selon l'invention pendant une phase d'ouverture de la connexion électrique.
  • La figure 3 est une représentation de détail en coupe longitudinale d'un exemple de réalisation d'un sectionneur selon l'invention dans lequel la tige de manoeuvre est une vis sans fin.
  • La figure 4 est une représentation de détail en coupe longitudinale d'un exemple de réalisation d'un sectionneur selon l'invention dans lequel le contact fixe est équipé de résistances.
Other features and advantages will appear even better on reading the following description of an embodiment of a disconnector according to the invention illustrated in the drawings.
  • Figures 1a to 1e schematically illustrate the operation of the disconnector according to the invention during a closing phase of the electrical connection.
  • Figures 2a to 2e schematically illustrate the operation of the disconnector according to the invention during a phase of opening the electrical connection.
  • Figure 3 is a detail representation in longitudinal section of an embodiment of a disconnector according to the invention wherein the operating rod is a worm.
  • Figure 4 is a detail representation in longitudinal section of an embodiment of a disconnector according to the invention wherein the fixed contact is equipped with resistors.

Le sectionneur électrique selon l'invention est un sectionneur haute tension comprenant, dans une enveloppe métallique cylindrique (non représentée sur les dessins) qui s'étend suivant une direction axiale A et qui est remplie d'un gaz d'isolement comme le SF6, un contact 1 qui est monté fixe et qui est par exemple creux et un contact 2 monté mobile suivant la direction axiale par rapport au contact fixe. Le contact mobile est par exemple en forme de tige, est coaxial au contact fixe 1 et vient s'insérer dans le contact fixe creux pour établir une connexion électrique.The electrical disconnector according to the invention is a high-voltage disconnector comprising, in a cylindrical metal casing (not shown in the drawings) which extends in an axial direction A and which is filled with an insulating gas such as SF6, a contact 1 which is fixed and which is for example hollow and a contact 2 mounted movably in the axial direction relative to the fixed contact. The movable contact is for example rod-shaped, is coaxial with the fixed contact 1 and is inserted into the hollow fixed contact to establish an electrical connection.

Le sectionneur comprend encore une tige 3 coaxiale aux contacts 1 et 2, qui s'étend suivant la direction axiale A et qui est manoeuvrée pour déplacer le contact 2 par rapport au contact 1.The disconnector further comprises a rod 3 coaxial with the contacts 1 and 2, which extends in the axial direction A and which is operated to move the contact 2 relative to the contact 1.

Sur les figures 1 et 2, le contact mobile 2 est guidé en déplacement suivant la direction axiale par un tube fixe 4 coaxial à la tige de manoeuvre 3.In FIGS. 1 and 2, the moving contact 2 is guided in displacement in the axial direction by a fixed tube 4 coaxial with the operating rod 3.

Selon l'invention, le contact mobile 2 est un tube creux cylindrique ayant une première extrémité 2A qui fait face au contact fixe 1 et une seconde extrémité 2B opposée à l'extrémité 2A traversée par la tige de manoeuvre 3. Un piston 5 est disposé coulissant à l'intérieur du contact 2 ; il présente un premier côté 5A orienté du côté du contact 1 et un second côté 5B opposé au côté 5A.According to the invention, the movable contact 2 is a cylindrical hollow tube having a first end 2A which faces the fixed contact 1 and a second end 2B opposite the end 2A traversed by the operating rod 3. A piston 5 is arranged sliding inside the contact 2; it has a first side 5A facing the contact side 1 and a second side 5B opposite the side 5A.

Sur les figures 1 et 2, le piston 5 est fixé à l'extrémité de la tige 3 qui coulisse dans le contact 2. Comme on le verra ci-dessous en relation avec la figure 3, la tige 3 peut être une vis sans fin et le piston 5 peut être dans ce cas un écrou.In Figures 1 and 2, the piston 5 is fixed to the end of the rod 3 which slides in the contact 2. As will be seen below in connection with Figure 3, the rod 3 may be a worm and the piston 5 can be in this case a nut.

Un premier ressort 6, par exemple un ressort à spirales, est interposé entre la première extrémité 2A du contact 2 et le premier côté 5A du piston. Un second ressort 7, par exemple à spirales, est interposé entre la seconde extrémité 2B du contact 2 et le second côté 5B du piston.A first spring 6, for example a spiral spring, is interposed between the first end 2A of the contact 2 and the first side 5A of the piston. A second spring 7, for example spiral, is interposed between the second end 2B of the contact 2 and the second side 5B of the piston.

L'autre extrémité de la tige 3 est connectée à la commande du sectionneur (non représentée) qui agit ici pour déplacer en translation la tige 3 suivant la direction axiale A. En particulier, lors d'une opération de fermeture du sectionneur, la commande agit pour déplacer la tige 3 et donc le piston 5 vers le contact fixe 1 et lors d'une opération d'ouverture du sectionneur, la commande agit pour déplacer la tige 3 et donc le piston 5 en sens contraire.The other end of the rod 3 is connected to the control of the disconnector (not shown) which acts here to move in translation the rod 3 in the axial direction A. In particular, during a closing operation of the disconnector, the control is used to move the rod 3 and thus the piston 5 to the fixed contact 1 and during an opening operation of the disconnector, the control acts to move the rod 3 and thus the piston 5 in the opposite direction.

Le sectionneur comprend encore un premier système de verrouillage 8, du type à bille escamotable, qui immobilise le contact 2 suivant la direction axiale quand la tige 3 est manoeuvrée lors d'une opération de fermeture du sectionneur, en même temps que le premier ressort 6 est comprimé entre le piston et la première extrémité 2A du contact 2. Ce premier système de verrouillage s'efface après une certaine compression du premier ressort 6 de telle façon que le contact 2 est connecté à grande vitesse avec le contact 1 sous l'effet de la détente du ressort 6 en appui contre le piston 5.The disconnector further comprises a first locking system 8, of the retractable ball type, which immobilizes the contact 2 in the axial direction when the rod 3 is operated during a closing operation of the disconnector, at the same time as the first spring 6 is compressed between the piston and the first end 2A of the contact 2. This first locking system is erased after a certain compression of the first spring 6 so that the contact 2 is connected at high speed with the contact 1 under the effect the relaxation of the spring 6 bearing against the piston 5.

Le sectionneur comprend encore un second système de verrouillage 9 qui immobilise le contact 2 suivant la direction axiale quand la tige 3 est manoeuvrée lors d'une opération d'ouverture du sectionneur, en même temps que le ressort 7 est comprimé entre le piston 5 et la seconde extrémité 2B du contact 2. Ce second système de verrouillage s'efface après une certaine compression du ressort 7 de telle façon que le contact 2 est déconnecté du contact 1 à grande vitesse sous l'effet de la détente du ressort 7en appui contre le piston 5.The isolator further comprises a second locking system 9 which immobilizes the contact 2 in the axial direction when the rod 3 is operated during an opening operation of the disconnector, at the same time as the spring 7 is compressed between the piston 5 and the second end 2B of the contact 2. This second locking system is erased after a certain compression of the spring 7 so that the contact 2 is disconnected from the contact 1 at high speed under the effect of the relaxation of the spring 7 in support against the piston 5.

Le fonctionnement du sectionneur selon l'invention est décrit ci-après pour une manoeuvre de fermeture en relation avec les figures 1a à 1e et pour une manoeuvre d'ouverture en relation avec les figures 2a à 2e.The operation of the disconnector according to the invention is described below for a closing maneuver in relation to FIGS. 1a to 1e and for an opening maneuver in relation to FIGS. 2a to 2e.

Sur la figure 1a, le sectionneur selon l'invention est en position d'ouverture complète. Le ressort 7 est comprimé entre le piston 5 et l'extrémité 2B du contact 2. Le ressort 6 est complètement détendu entre l'extrémité 2A du contact 2 et le piston 5. Le contact 2 est immobilisé suivant la direction axiale A dans le tube de guidage 4 par le système de verrouillage à bille escamotable 8 qui est ici armé.In Figure 1a, the disconnector according to the invention is in the fully open position. The spring 7 is compressed between the piston 5 and the end 2B of the contact 2. The spring 6 is completely expanded between the end 2A of the contact 2 and the piston 5. The contact 2 is immobilized in the axial direction A in the tube 4 by the retractable ball lock system 8 which is here armed.

Figure 1b, la tige 3 est déplacée par une manoeuvre en translation en direction du contact fixe 1 comme indiquée par la flèche sur le piston 5 ; elle entraîne le piston 5 dans cette direction ce qui fait que le ressort 6 est comprimé par le piston 5 contre l'extrémité 2A du contact 2 alors que le ressort 7 est détendu.Figure 1b, the rod 3 is moved by a translational maneuver towards the fixed contact 1 as indicated by the arrow on the piston 5; it drives the piston 5 in this direction so that the spring 6 is compressed by the piston 5 against the end 2A of the contact 2 while the spring 7 is expanded.

Figure 1c, après un certain déplacement du piston 5 dans le contact 2 et donc une certaine compression du ressort 6, le système de verrouillage à bille 8 est escamoté ce qui libère le mouvement du contact 2 dans le tube 4.1c, after a certain displacement of the piston 5 in the contact 2 and thus some compression of the spring 6, the ball locking system 8 is retracted which releases the movement of the contact 2 in the tube 4.

Figure 1d, le contact 2 s'insère à grande vitesse dans le contact fixe 1 sous l'action du ressort 6 qui se détend entre le piston 5 et l'extrémité 2A du contact 2. Le piston 5 continue à être déplacé en direction du contact fixe 1 et le second système de verrouillage à bille 9 est armé pour immobiliser le contact 2 suivant la direction axiale A dans le tube de guidage 4.1d, the contact 2 is inserted at high speed in the fixed contact 1 under the action of the spring 6 which expands between the piston 5 and the end 2A of the contact 2. The piston 5 continues to be moved towards the fixed contact 1 and the second ball lock system 9 is armed to immobilize the contact 2 in the axial direction A in the guide tube 4.

Figure 1e, le piston 5 continue à être déplacé en direction du contact fixe 1 ce qui fait que le ressort 6 est comprimé entre le piston 5 et l'extrémité 2A du contact 2. Le sectionneur est dans sa position complètement fermée assurée de façon positive parce que la tige 3 et donc le piston 5 ont été déplacés jusqu'à comprimer le ressort 6 et se trouvent donc dans une position où mécaniquement le contact mobile doit être inséré dans le contact fixe.Figure 1e, the piston 5 continues to be moved towards the fixed contact 1 so that the spring 6 is compressed between the piston 5 and the end 2A of the contact 2. The disconnector is in its fully closed position positively assured because the rod 3 and thus the piston 5 have been moved to compress the spring 6 and are therefore in a position where the mechanical contact mechanically must be inserted into the fixed contact.

Pendant cette opération de fermeture, le contact mobile 2 s'est donc déplacé indépendamment de la tige de manoeuvre 3 et du piston 5. La vitesse de déplacement en translation de la tige de manoeuvre 3 et donc du piston 5 peut donc être beaucoup plus petite que la vitesse de déplacement du contact mobile 2. La vitesse de déplacement de la tige de manoeuvre 3 et donc du piston 5 peut également être constante contrairement à la vitesse de déplacement du contact mobile 2. La fin de l'opération de fermeture du sectionneur peut être contrôlée par la détection de la position extrême du piston 5 et de la tige 3.During this closing operation, the moving contact 2 has therefore moved independently of the operating rod 3 and the piston 5. The translational speed of the operating rod 3 and thus of the piston 5 can therefore be much smaller. that the speed of displacement of the movable contact 2. The speed of displacement of the actuating rod 3 and therefore of the piston 5 can also be constant contrary to the speed of displacement of the movable contact 2. The end of the closing operation of the disconnector can be controlled by detecting the extreme position of the piston 5 and the rod 3.

Sur la figure 2a le sectionneur est dans une position de fermeture complète qui correspond à celle illustrée sur la figure 1e. Le contact 2 est immobilisé en déplacement suivant la direction axiale A dans le tube de guidage 4 du fait que le système de verrouillage 9 est armé.In Figure 2a the disconnector is in a complete closed position which corresponds to that illustrated in Figure 1e. The contact 2 is immobilized in displacement in the axial direction A in the guide tube 4 because the locking system 9 is armed.

Figure 2b, la tige 3 est éloignée par translation du contact fixe 1 comme indiquée par la flèche sur le piston 5 ; elle entraîne le piston 5 dans la même direction ce qui fait que le ressort 7 est comprimé par le piston 5 contre l'extrémité 2B du contact 2 alors que le ressort 6 est détendu.Figure 2b, the rod 3 is moved away by the fixed contact 1 as indicated by the arrow on the piston 5; it drives the piston 5 in the same direction so that the spring 7 is compressed by the piston 5 against the end 2B of the contact 2 while the spring 6 is expanded.

Figure 2c, après un certain déplacement du piston 5 dans le contact 2 et donc une certaine compression du ressort 7, le système de verrouillage à bille 9 est escamoté ce qui libère le mouvement du contact 2 dans le tube 4.2c, after a certain displacement of the piston 5 in the contact 2 and thus some compression of the spring 7, the ball lock system 9 is retracted which releases the movement of the contact 2 in the tube 4.

Figure 2d, le contact 2 se dégage à grande vitesse du contact fixe 1 sous l'action du ressort 7 qui se détend entre le piston 5 et l'extrémité 2B du contact 2. En même temps le piston 5 continue à être éloigné du contact fixe 1 et le premier système de verrouillage à bille 8 est armé pour immobiliser le contact 2 suivant la direction axiale A dans le tube de guidage 4.2d, the contact 2 emerges at high speed from the fixed contact 1 under the action of the spring 7 which expands between the piston 5 and the end 2B of the contact 2. At the same time the piston 5 continues to be away from the contact fixed 1 and the first ball lock system 8 is armed to immobilize the contact 2 in the axial direction A in the guide tube 4.

Figure 2e, le piston 5 continue à être éloigné du contact fixe 1 ce qui fait que le ressort 7 est comprimé entre le piston 5 et l'extrémité 2B du contact 2. Le sectionneur est dans sa position complètement ouverte assurée de façon positive parce que la tige 3 et donc le piston 5 ont été déplacés jusqu'à comprimer le ressort 7 et se trouvent donc dans une position où mécaniquement le contact mobile doit être retiré du contact fixe.Figure 2e, the piston 5 continues to be away from the fixed contact 1 so that the spring 7 is compressed between the piston 5 and the end 2B of the contact 2. The disconnector is in its fully open position positively assured because the rod 3 and thus the piston 5 have been moved to compress the spring 7 and are therefore in a position where the mechanical contact must be removed from the fixed contact.

Pendant cette opération d'ouverture, le contact mobile 2 s'est donc encore déplacé indépendamment de la tige de manoeuvre 3 et du piston 5. La fin de l'opération d'ouverture du sectionneur peut être encore contrôlée par la détection de la position extrême du piston 5 et de la tige 3.During this opening operation, the moving contact 2 has thus moved again independently of the operating rod 3 and the piston 5. The end of the opening operation of the disconnector can be further controlled by the detection of the position extreme of the piston 5 and the rod 3.

La figure 3 montre plus en détails en coupe longitudinale suivant la direction axiale A un exemple de réalisation d'un sectionneur selon l'invention. Dans cet exemple de réalisation, la tige de manoeuvre 3 est une vis sans fin rotative d'axe de rotation A. Le piston 5 est un écrou dans lequel est engagée la vis sans fin 3. Suivant le sens de rotation de la vis sans fin 3, l'écrou 5 se déplace en translation (sans possibilité de rotation) dans un sens ou dans l'autre suivant la direction axiale A à l'intérieur du contact mobile 2. De part et d'autre de la tête de l'écrou 5, sont disposés le ressort 6 et le ressort 7 à spirales. La figure 3 montre le sectionneur en position d'ouverture complète, le ressort 7 étant comprimé entre l'écrou 5 et l'extrémité 2B du contact mobile 2.Figure 3 shows in greater detail in longitudinal section in the axial direction to an embodiment of a disconnector according to the invention. In this embodiment, the operating rod 3 is a rotary worm with rotation axis A. The piston 5 is a nut in which is engaged the worm 3. According to the direction of rotation of the worm 3, the nut 5 moves in translation (without possibility of rotation) in one direction or the other in the axial direction A inside the moving contact 2. On both sides of the head of the nut 5, are arranged the spring 6 and the spring 7 with spirals. FIG. 3 shows the disconnector in the fully open position, the spring 7 being compressed between the nut 5 and the end 2B of the movable contact 2.

Un tiroir cylindrique 10 est disposé à l'intérieur du contact 2 coaxialement à l'écrou 5. Ce tiroir coulisse sur l'écrou 5 et agit sur des billes escamotables 8 et 9 des systèmes de verrouillage logées dans des ouvertures radiales 11 du contact 2. Il est constitué plus particulièrement de deux demi-tiroirs 10A et 10B indépendants l'un de l'autre en déplacement suivant la direction axiale A.A cylindrical spool 10 is disposed inside the contact 2 coaxially with the nut 5. This spool slides on the nut 5 and acts on retractable balls 8 and 9 locking systems housed in radial openings 11 of the contact 2 It consists more particularly of two half-drawers 10A and 10B independent of each other in displacement in the axial direction A.

Le demi-tiroir 10A comporte une nervure radiale d'extrémité 12A sur laquelle vient en butée l'écrou 5 lorsque celui-ci est déplacé vers le contact fixe 1. Le demi-tiroir 10B comporte aussi une nervure radiale d'extrémité 12B sur laquelle vient en butée l'écrou 5 lorsque celui-ci est éloigné du contact fixe 1. En plus, un ressort à spirales 13 est disposé entre la nervure d'extrémité 12A du demi-tiroir 10A et un épaulement 2AA prévu à l'extrémité 2A du contact 2 et un autre ressort à spirales 14 est disposé entre la nervure d'extrémité 12B du demi-tiroir 10B et un épaulement 2BB prévu à l'extrémité 2B du contact 2 ; ces ressorts 13 et 14 servent à rappeler en position les demi-tiroirs 10A et 10B lorsque l'écrou 5 se trouve suivant la direction radiale entre les nervures 12A et 12B.The half-slide 10A comprises a radial end rib 12A on which the nut 5 comes into abutment when the latter is moved towards the fixed contact 1. The half-slide 10B also comprises a radial end rib 12B on which the nut 5 comes into abutment when the latter is moved away from the fixed contact 1. In addition, a spiral spring 13 is disposed between the end rib 12A of the half-slide 10A and a shoulder 2AA provided at the end 2A. contact 2 and another spiral spring 14 is disposed between the end rib 12B of the half-drawer 10B and a shoulder 2BB provided at the end 2B of the contact 2; these springs 13 and 14 serve to recall in position the half-drawers 10A and 10B when the nut 5 is in the radial direction between the ribs 12A and 12B.

Comme cela apparaît sur la figure 3, le tube de guidage 4 comporte un premier évidemment 15 dans lequel peut s'engager la bille 8 et un second évidement 16 dans lequel peut s'engager la bille 9 ; ces deux évidements 15 et 16 sont distants l'un de l'autre suivant la direction axiale A. Par ailleurs, le demi-tiroir 10A comporte un premier évidemment 17 dans lequel peut s'effacer la bille 8 et le demi-tiroir 10B comporte un second évidemment 18 dans lequel peut s'effacer la bille 9 ; ces deux évidements 17 et 18 sont distants l'un de l'autre suivant la direction axiale A.As shown in FIG. 3, the guide tube 4 comprises a first recess 15 in which the ball 8 can engage and a second recess 16 into which the ball 9 can engage; these two recesses 15 and 16 are spaced apart from each other in the axial direction A. Moreover, the half-drawer 10A includes a first recess 17 in which can fade the ball 8 and the half-drawer 10B comprises a second obviously 18 in which can fade the ball 9; these two recesses 17 and 18 are spaced apart from one another in the axial direction A.

Quand la bille 8 est engagée dans l'évidement 15 du tube 4, elle verrouille le déplacement du contact 2 suivant la direction axiale A et quand la nervure 12A du demi-tiroir 10A est poussée par l'écrou 5 pendant la phase de fermeture du sectionneur, la bille 8 vient en face de l'évidement 17 dans lequel elle peut s'effacer pour libérer le déplacement du contact mobile 2. Par ailleurs, quand la bille 9 est engagée dans l'évidement 16 du tube 4, elle verrouille le déplacement du contact 2 suivant la direction axiale A et quand la nervure 12B du demi-tiroir 10B est poussée par l'écrou 5 pendant la phase d'ouverture du sectionneur, la bille 9 vient en face de l'évidement 18 dans lequel elle peut s'effacer pour libérer le déplacement du contact mobile 2.When the ball 8 is engaged in the recess 15 of the tube 4, it locks the displacement of the contact 2 in the axial direction A and when the rib 12A of the half-slide 10A is pushed by the nut 5 during the closing phase of the disconnector, the ball 8 comes in front of the recess 17 in which it can be erased to release the displacement of the movable contact 2. Moreover, when the ball 9 is engaged in the recess 16 of the tube 4, it locks the displacement of the contact 2 in the axial direction A and when the rib 12B of the half-slide 10B is pushed by the nut 5 during the opening phase of the disconnector, the ball 9 comes in front of the recess 18 in which it can fade to release the movement of the moving contact 2.

Sur la figure 3, la bille 8 est engagée dans l'évidement 15 du tube 4 alors que la bille 9 est effacée dans l'évidement 18 du demi-tiroir 10B. Cette configuration du sectionneur correspond à celle illustrée sur la figure 1a.In Figure 3, the ball 8 is engaged in the recess 15 of the tube 4 while the ball 9 is erased in the recess 18 of the half-drawer 10B. This configuration of the disconnector corresponds to that illustrated in Figure 1a.

Quand l'écrou 5 est déplacé en direction du contact 1 lors d'une opération de fermeture, l'écrou 5 arrive en butée contre la nervure radiale 12A du demi-tiroir 10A et déplace le demi-tiroir 10A pour amener l'évidement 17 en regard de la bille 8 de façon à permettre à cette dernière de s'effacer. Cette position du sectionneur correspond à celle illustrée sur la figure 1c. Par ailleurs, lorsque la bille 9 arrive en face de l'évidement 16, le ressort de rappel 14 pousse le demi-tiroir 10B ce qui conduit à ce que la bille 9 s'efface dans l'évidement 16 et à ce que l'évidement 18 dépasse la position de la bille 9, et donc au verrouillage du contact 2 avec le tube de guidage 4. Cette position du sectionneur correspond à celle illustrée sur la figure 1d.When the nut 5 is moved towards the contact 1 during a closing operation, the nut 5 comes into abutment against the radial rib 12A of the half-drawer 10A and moves the half-drawer 10A to bring the recess 17 next to the ball 8 to allow it to fade. This position of the disconnector corresponds to that illustrated in Figure 1c. Moreover, when the ball 9 comes in front of the recess 16, the return spring 14 pushes the half-drawer 10B which causes the ball 9 to fade into the recess 16 and that the recess 18 exceeds the position of the ball 9, and thus the locking of the contact 2 with the guide tube 4. This position of the disconnector corresponds to that illustrated in Figure 1d.

Maintenant, en partant d'une position de fermeture du sectionneur, quand l'écrou 5 est éloigné du contact 1, il arrive en butée contre la nervure 12B du demi-tiroir 10B et déplace le demi-tiroir 10B pour amener l'évidement 18 en regard de la bille 9 de façon à permettre à cette dernière de s'effacer. Cette position du sectionneur correspond à celle illustrée sur la figure 2c. Par ailleurs, lorsque la bille 8 arrive en face de l'évidement 15, le ressort de rappel 13 pousse le demi-tiroir 10A ce qui conduit à ce que la bille 8 s'efface dans l'évidement 15 et à ce que l'évidement 17 dépasse la position de la bille 8, et donc au verrouillage du contact 2 avec le tube de guidage 4. Cette position du sectionneur correspond à celle illustrée sur la figure 2d.Now, starting from a closing position of the disconnector, when the nut 5 is moved away from the contact 1, it comes into abutment against the rib 12B of the half-slide 10B and moves the half-slide 10B to bring the recess 18 next to the ball 9 to allow it to fade. This position of the disconnector corresponds to that illustrated in Figure 2c. Furthermore, when the ball 8 comes in front of the recess 15, the return spring 13 pushes the half-drawer 10A which causes the ball 8 to fade into the recess 15 and that the recess 17 exceeds the position of the ball 8, and therefore the locking of the contact 2 with the guide tube 4. This position of the disconnector corresponds to that illustrated in Figure 2d.

Figure 4, dans un mode de réalisation préféré d'un sectionneur selon l'invention, le contact fixe 1' est équipé de résistances R permettant d'obtenir un appareil particulièrement efficace pour protéger le matériel connecté contre les surtensions transitoires à très hautes fréquences lors d'une commutation du sectionneur sur courant capacitif. Afin de canaliser un arc électrique 20, le contact fixe 1' comprend un contact d'arc ou capot 21 directement et uniquement connecté à des résistances R. Ce capot possède des angles arrondis procurant un effet pare-effluve, et un diamètre interne légèrement supérieur au diamètre du contact mobile 2, de sorte que le contact mobile ne touche pas le capot à l'insertion. Lorsque un arc électrique 20 s'amorce entre l'extrémité 2A du contact mobile 2 et le capot 21, il est entièrement canalisé vers les résistances R et le courant i traverse ces dernières pour être évacué vers un conducteur 23 typiquement relié à une barre. Les arcs 20 sont ainsi guidés par le capot 21 jusqu'à la connexion avec le contact de courant permanent 22.4, in a preferred embodiment of a disconnector according to the invention, the fixed contact 1 'is equipped with resistors R making it possible to obtain a particularly effective apparatus for protecting the connected equipment against transient overvoltages at very high frequencies when switchover of the disconnector on capacitive current. In order to channel an electric arc 20, the fixed contact 1 'comprises an arc contact or cover 21 directly and only connected to resistors R. This cover has rounded corners providing a corona-shielding effect, and a slightly greater internal diameter to the diameter of the movable contact 2, so that the movable contact does not touch the cover at insertion. When an electric arc 20 starts between the end 2A of the movable contact 2 and the cover 21, it is fully channeled to the resistors R and the current i passes through them to be discharged to a conductor 23 typically connected to a bar. The arcs 20 are thus guided by the hood 21 to the connection with the permanent current contact 22.

Afin de pouvoir aussi assurer la commutation des courants élevés de transfert de barres sans risque de fusion des contacts, le contact permanent 22 loge classiquement le long de son axe de symétrie un contact d'arc rétractable 24 formé d'une tige conductrice accouplée à un ressort. Cette tige, aussi représentée dans le contact fixe 1 à la figure 3, est constituée d'un matériau peu sensible à l'échauffement, et peut supporter un fort courant au moment où le contact mobile 2 vient la pousser. De plus, l'échauffement produit est limité par le fait que la connexion du contact mobile au contact de courant permanent 22 est effectuée très peu de temps après.In order to also be able to switch high bus transfer currents without any risk of melting the contacts, the permanent contact 22 conventionally houses along its axis of symmetry a retractable arc contact 24 formed of a conducting rod coupled to a spring. This rod, also shown in the fixed contact 1 in Figure 3, is made of a material insensitive to heating, and can withstand a strong current at the moment when the movable contact 2 pushes it. In addition, the heating produced is limited in that the connection of the movable contact to the permanent current contact 22 is carried out very shortly afterwards.

Claims (5)

  1. An electrical disconnector comprising a first contact (2) which is mounted to move along an axial direction (A) relative to a second contact (1) which is fixed in said direction and which cooperates therewith to establish an electrical connection, and a rod (3) which extends along said axial direction and which is driven to move the moving contact relative to the fixed contact, the moving contact being a hollow tube having a first end (2A) which faces the fixed contact and a second end (2B) opposite to the first end, characterized in that it comprises a piston (5) slidable inside the moving contact, the piston (5) being mounted on the rod (3) and having a first end facing towards the fixed contact and a second end opposite from the first end, in that a first spring (6) is interposed between the first end of the moving contact and the first end of the piston, in that a second spring (7) is interposed between the second end of the moving contact and the second end of the piston, in that a first locking system (8) is provided to lock the moving contact in the axial direction during an operation of closing the disconnector at the same time as the first spring is compressed between the piston and the first end of the moving contact, said first locking system retracting after the first spring has been compressed by a certain amount so that the moving contact is connected to the fixed contact under the effect of the first spring relaxing, and in that a second locking system (9) is provided to prevent the moving contact from moving in the axial direction during an opening operation while the second spring is being compressed between the piston and the second end of the moving contact, said second locking system retracting after the second spring has been compressed by a certain amount so that the moving contact is disconnected from the fixed contact under the effect of the second spring relaxing.
  2. A disconnector according to claim 1, in which the first and second locking systems are retractable balls.
  3. A disconnector according to claim 1 or 2, in which the drive rod is a worm screw and the piston is a nut in which the worm screw is engaged.
  4. A disconnector according to claim 1 or 2, in which the drive rod is moved in translation and the piston is fixed to one end of the rod.
  5. A disconnector according to any one of claims 1 to 4, in which the fixed contact comprises a permanent contact (22) and an arcing contact (21) connected to resistors, and in which the current produced by electric arcs (20) being struck passes in full via said resistors, when the moving contact is moving into contact.
EP00401303A 1999-05-17 2000-05-12 High tension isolating switch with a mobile contact movable at high speed Expired - Lifetime EP1054419B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906212A FR2793945B1 (en) 1999-05-17 1999-05-17 HIGH VOLTAGE DISCONNECTOR WITH MOBILE CONTACT MOVED AT HIGH SPEED
FR9906212 1999-05-17

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EP1054419A1 EP1054419A1 (en) 2000-11-22
EP1054419B1 true EP1054419B1 (en) 2006-08-16

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EP (1) EP1054419B1 (en)
JP (1) JP2000353457A (en)
KR (1) KR20010020851A (en)
CN (1) CN1171264C (en)
DE (1) DE60030032T2 (en)
FR (1) FR2793945B1 (en)
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DE2758264A1 (en) * 1977-12-27 1979-07-05 Bbc Brown Boveri & Cie Vacuum circuit breaker drive - has spring loaded pegs on moving contact carrier forced against locating surfaces in end positions
US4414449A (en) * 1981-05-26 1983-11-08 Brown Boveri Electric Inc. Quick open and close disconnect switch
US4636602A (en) * 1985-04-10 1987-01-13 S&C Electric Company Linear operating mechanism for electrical switches
DE3832171A1 (en) * 1988-07-01 1990-01-04 Licentia Gmbh DEVICE FOR RAPID SWITCHING ON AND OFF OF SMALL CURRENTS FOR DISCONNECTORS FROM V.I.S.
FR2746540B1 (en) * 1996-03-22 1998-04-24 Gec Alsthom T & D Sa CONTROL FOR HIGH VOLTAGE CIRCUIT BREAKER
FR2747502B1 (en) * 1996-04-10 1998-05-15 Gec Alsthom T & D Sa CONTROLLER SPRING CONTROL FOR HIGH VOLTAGE CIRCUIT BREAKER
FR2748597B1 (en) * 1996-05-13 1998-06-12 Gec Alsthom T & D Sa HIGH VOLTAGE CIRCUIT BREAKER WITH CLOSING RESISTANCE INSERTION

Also Published As

Publication number Publication date
CN1171264C (en) 2004-10-13
US6466420B1 (en) 2002-10-15
FR2793945A1 (en) 2000-11-24
DE60030032T2 (en) 2007-02-15
FR2793945B1 (en) 2001-06-22
DE60030032D1 (en) 2006-09-28
TW476080B (en) 2002-02-11
JP2000353457A (en) 2000-12-19
KR20010020851A (en) 2001-03-15
ID26059A (en) 2000-11-23
CN1285604A (en) 2001-02-28
EP1054419A1 (en) 2000-11-22

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