EP1575067A1 - Sectionneur de terre pivotant à insertion directe et à mouvement simple - Google Patents
Sectionneur de terre pivotant à insertion directe et à mouvement simple Download PDFInfo
- Publication number
- EP1575067A1 EP1575067A1 EP05101787A EP05101787A EP1575067A1 EP 1575067 A1 EP1575067 A1 EP 1575067A1 EP 05101787 A EP05101787 A EP 05101787A EP 05101787 A EP05101787 A EP 05101787A EP 1575067 A1 EP1575067 A1 EP 1575067A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- earthing switch
- contact
- switch according
- arms
- disconnector
- 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.)
- Granted
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
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- 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
- H01H31/003—Earthing switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/42—Knife-and-clip contacts
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- 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
- H01H31/28—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 angularly-movable contact
Definitions
- the invention relates to a disconnector comprising a pivoting movable contact assembly around an axis of rotation and an arranged fixed contact to be electrically connected to an end of said mobile contact set when this set is brought into the closed position of the disconnector.
- the invention relates more particularly to a earthing switch intended for use in transmission and distribution facilities of high voltage electrical energy in the open air and even more particularly an earthing switch says to direct insertion and simple movement in which movement needed to connect the moving contact assembly with the fixed contact is done by a simple rotation of this set mobile.
- the mobile contact assembly is generally called "mobile contact”, and for the sake of simplicity we will use this name in the description following.
- the short circuit current value that a earthing switch is able to tolerate depends directly from overheating (the increase in temperature relative to the ambient temperature) in short circuit conditions and, in particular, overheating of the contact area between the contact fixed and moving contact. For example, it can be specified for a disconnector to be able to withstand a short-circuit current in the order of 50 kA for a second.
- the behavior of the disconnector of earth is all the better than the pressure of contact between the fixed and mobile contacts is high.
- US-4490595 discloses a disconnector of ground with direct insertion and simple movement in which has sought to minimize the impact of electromagnetic forces acting on the fixed contacts and mobile especially during the passage of a current of short circuit in the contacts.
- An insulating stop blocks rotation of the swivel knife of mobile contact, and prevents this knife from being able to go out in the direction beyond the slit spared between two parallel flexible arms ensuring the role fixed contact.
- This fixed contact is electrically connected to a metal shell to the potential of the Earth.
- This configuration implies that the contact mobile is electrically connected to a phase of the line, which has drawbacks in particular for ensure control of the swivel knife and to ensure the arrangement of the knife in the open position without to pose problems of dielectric strength.
- the two flexible arms of the fixed contact must be sufficiently long and positioned to create when the disconnector is closed a loop current which allows to exercise on the knife a force which maintains support against the insulating stop.
- Such sizing of the fixed contact requires a distance of significant dielectric isolation in the space between the knife pivot and the fixed contact.
- an electrodynamic pinch of the knife is created by the parallel currents that circulate in the two flexible arms of the fixed contact and that generate a force of mutual attraction between these two arms. It should be noted that with such configuration, the electrodynamic pinch force of the knife remains lower than the force of attraction which tends to bring the two arms closer together Flexible.
- a first objective of the present invention is to realize a disconnecting earthing switch direct and simple movement in which the part mobile can be electrically connected to the earth, and in which the fixed part is of dimensions relatively small compared to the moving part to ensure a dielectric isolation distance relatively low between the fixed and mobile parts in the open position of the disconnector.
- a second objective of the present invention is to exploit the electromagnetic forces that are exercised in a disconnecting earthing switch direct and simple movement when passing a short-circuit current in the contacts, for reinforce the maintenance of the earthing switch in its fully closed position, and to strengthen the mutual contact pressure between the fixed and mobile thanks to an electrodynamic pinch effect provided by the amplification by a leverage effect of the mutual force of attraction that tends to bring between them two parallel arms of the moving contact.
- Another object of the present invention is to propose a direct insertion earthing switch and simple movement that can be put in motion using a low torque command, and which allows to do without springs to ensure the desired contact pressure between the elements of fixed and mobile contact.
- the subject of the invention is a earthing switch as defined in the preamble, characterized in that said moving contact assembly includes two electrically conductive arms substantially parallel which are bent to form each at least approximately one L, each arm elbow comprising at least one flexible finger extending at least on the shortest branch of the L, the contact stationary being so arranged as to be engaged between minus a pair of flexible fingers in the position of closing of the disconnector, and in that means of join are mechanically connected at both ends of the two arms bent on the branches shorter Ls to allow for leverage which amplifies the electrodynamic pinch exerted on the fixed contact by the flexible fingers when a short circuit current or fault current travels the arms bent.
- an earthing switch exploits the well-known electrotechnical principle of the elementary force which is exerted on a conductor when it is traversed by a current and when it is subjected to an induction field.
- electrotechnical principle of the elementary force which is exerted on a conductor when it is traversed by a current and when it is subjected to an induction field.
- FIG. 1 it is known that two parallel conductive elements d1 traversed in the same direction by a current I undergo a pulling force df which tends to bring them closer to one another. other, and that is proportional to the square of the current.
- An earthing switch according to the invention for high voltage applications is a disconnector said to direct insertion and simple movement. It is formed by a first part movable in rotation and by a second fixed part.
- the moving part of the earthing switch is a contact 1 mounted on a conductive rod pivoting about an axis of rotation (not shown) and connected to the potential of the earth.
- This mobile contact 1 includes two parallel metal arms 2,3 angled to each form an L, and is able to rotate about 90 ° around the axis of rotation that is located in the axial extension of the longest branch L-arms.
- the mobile contact 1 is connected electrically to the potential of the earth in its section lower and more precisely near the axis area rotation, while the upper section of the mobile contact (the shortest branch of the arms in L) makes the electrical contact with the fixed part of the switch.
- This fixed part of the disconnector is here a cylindrical contact 4 copper which is inserted between the two shorter branches of the L-arms of the movable contact 1 when the disconnector is moved from its open position to its position of closing.
- the disconnector is shown in a fully closed position where the movable contact 1 is in electrical contact with the fixed contact 4.
- each 2.3 L-shaped arm includes a first part of arm indicated by the references 2A, 3A which is formed by the longest branch of the L and stretching from the axis of rotation to a second part of arm 2B, 3B forming the shortest branch of L.
- second arm part indicated by the references 2B, 3B extends substantially transversely (perpendicularly) to the first arm part 2A, 3A.
- the two branches of an L be strictly rectilinear.
- a hinge spacer E connects the free ends of the second arm portions 2B, 3B which are flexibly mounted in the sense that they can move independently.
- the spacer E defines with the second parts of arm 2B, 3B an open U-shaped slot indicated by 5 and more visible in Figure 5. This slot 5 Open U-shaped is the upper part of the mobile contact 1.
- the seconds arm portions 2B, 3B are slotted longitudinally to define flexible contact fingers bringing even more flexibility in the elastic spacing.
- every second arm part is split to define two flexible fingers superimposed 2B1,2B2; 3B1,3B2 and the spacer E here comprises two bolts 6 crossing each of the two fingers juxtaposed, for example 2B1,3B1 or 2B2,3B2 and each blocked by a nut 7.
- the spacer E provides a hinge function screws to screws fingertips flexible ends and allows the amplified electrodynamic pinch effect, when the second arm portions 2B, 3B tend to bring closer as explained later in this.
- a cylindrical sleeve 8 made of electrically insulating surrounds the stem of each bolt 6 which ensures the independence of the structure bolt relative to a short-circuit current withstand.
- the minimum spacing allowed between the two arms 2,3 is set by a wedge 9 disposed between the two arms 2,3 of the movable contact 1 near the elbow. This wedge prevents both arms to get too close when the contact mobile is traversed by a current of short circuit.
- Second arm parts are provided with plates of copper such as 10 promoting good contact electric with the fixed contact 4, and are also provided of skis made of insulating material such as 11 (more visible in Figures 4 and 5) extending longitudinally on the second arm parts and conferring a shape flared at the entrance to slot 5 to facilitate the insertion of the fixed contact 4 in the slot 5 when the closing of the earthing switch.
- each ski 11 extends in the extension of a copper plate 10 verses the back of the elbow of each L-shaped arm. Free spacing between two opposite plates 10 is slightly less than the contact diameter 4 cylindrical, so as to create the contact pressure initial mentioned above because of a slight elastic spacing of the second arm parts when the contact 4 is engaged between the plates 10.
- the plates 10 may have a slightly larger thickness on the side of the spacer that on the ski side 11, so as to increase said elastic spacing and therefore also the contact pressure force in abutment and current no. It is also possible to dispense with the sleeve 8 insulation provided that plates 10 comprise they themselves on the side of the spacer elements stop, for example constituted on at least two plates opposite by two trapezoidal shoulders of each plate to stop the relative movement of the fixed contact 4 with respect to the slot 5.
- the two screw plates would form substantially a U-shaped slot, and the stop function for fixed contact would be provided by these plates.
- the air gap between the plates and the bolts of the spacer would allow the independence of the structure of the spacer in relation to a resistance to currents default. It must be understood from this example that stop element for the fixed contact is not necessarily electrically insulating in a earthing switch according to the invention.
- the shortest branches of the cranked arms are slit longitudinally.
- Arm parts 2A, 3A of the movable contact are extended axially by a conductive rod 12 which is rotatably mounted at its free end around the axis of rotation of the movable contact 1.
- the rod 12 In position opening of the disconnector, the rod 12 is normally substantially horizontal.
- This rod is electrically connected to the earth via contacts sliders arranged at the axis of rotation of the mobile contact, or by wire ropes Flexible.
- the fixed contact 4 meanwhile, is fixed at the live bar which corresponds to the phase that can be grounded by the disconnector.
- the rod 12 with the L-shaped arms 2,3 are driven in rotation on an angle of about 90 ° to a substantially vertical position.
- the fixed contact 4 fits into the slot 5 while passing first at the elbows of the arms 2,3 between the skis 11 and finally comes to a stop against the spacer E formed.
- the cylindrical fixed contact 4 which extends axially towards the axis of rotation is then moderately pinched between the plates of copper 10 which are attached to the flexible fingers 2B1.3B1 and 2B2.3B2.
- the conductive rod 12 with the first arm portions 2A, 3A is inclined with respect to a vertical position of no balance while the cylindrical fixed contact is arranged in the bottom of the open U-shaped slot, resting against the spacer; so even when it is not traveled by a short-circuit current, the disconnector earth is kept in its closed position without that it is necessary for the control mechanism of the disconnector to exert a couple in the direction of the closing on the mobile contact 1 pivoting.
- fault current is meant a current greater than the nominal current that may pass through the line conductor that supports the fixed contact 4.
- the spacer E and in particular the bolts 6 associated with the nut 7, prevents any further separation of the ends of the flexible fingers once the fixed contact 4 positioned in abutment, and has a hinge role for an electrodynamic clamp whose two opposite levers are formed by the second arm portions 2B, 3B.
- This makes it possible to amplify at the fixed contact the force of mutual attraction as defined by the preceding relation (1) and which tends to bring the opposite levers of the clamp, in particular at the level of the flexible fingers.
- the mutual attraction force F c is proportional to the square of the current flowing through the electrical circuit of the earthing switch.
- the line of axial alignment of the cylindrical fixed contact 4 with the axis of rotation of the moving contact is represented by the substantially vertical line lv in FIG. 3, and it can be seen in this figure that the rod 12 with the arm portions 2A , 3A extend in a longitudinal direction which is inclined relative to the line lv of a non-zero angle ⁇ of a few degrees.
- the fixed contact is then in abutment against the spacer E of the movable contact 1, ensuring the latter a stable closed position.
- the spacer Since the spacer is electrically insulated relative to the fixed contact 4 by the sleeve 8, it it does not have to be thermally dimensioned to withstand short-circuit currents, which makes it independent of the amplitude of the short circuit current from a structural point of view and thermal.
- electromagnetic forces exerted in the direction of arrow F2 on the arms 2,3 cubits which tend to bring the fixed contact 4 closer together of the spacer E with the effect of blocking the contact fixed 4 in the bottom of the slot 5 and so a accentuation of the maintenance of the disconnector in its closing position.
- FIG 6 the pinch principle electrodynamic amplified by leverage is illustrated for a second type of realization of a earthing switch according to the invention.
- the disconnector is shown schematically in partial view by the above.
- the conductive rod in the extension of the two parallel arms 2,3 and the wedge between arm in the vicinity of the elbow are not shown.
- the difference with the first type of embodiment in relationship with Figures 3 to 5 focuses on the joining means that are mechanically connected at the two respective ends of the two bent arms on the shortest branches of L.
- These means of join do not include in this case a spacer itself, in the sense that the rigid piece 13 is not interposed between the fingers flexible of the two parallel arms. But this piece 13 forms a kind of stirrup that presents a section substantially in C and which limits the spacing flexible fingers.
- This piece ensures the same function that the spacer E in the first type of production.
- the joining means of these two types of realization ensure the function a hinge knot for an electrodynamic clamp whose levers are constituted by the fingers flexible of the two parallel arms.
- the piece 13 is called a screed.
- This force of attraction F1 resulting from the summation of the elementary forces along the length of the flexible fingers returns to a unique force of attraction whose point of application on each finger is approximately half of the length of the finger.
- the distance L1 between the point of application of F1 and the hinge node provided by the joining means is approximately equal to the length of the branch. shorter bent arms.
- This distance L1 is in any case much greater than the distance L2 between one or the other of the two points of application of the clamping force F3 of the fingers 21 and 31 on the fixed contact 4 and the hinge node.
- the distance L2 can be modified to a certain extent by modifying the height of the insulating bar 19 which serves as a stop means for the fixed contact 4 and which is fixed inside the yoke 13 by a bolt associated with a nut 15
- this bar 19 also serves as a stop means for limiting the approach of the flexible fingers facing in the open position of the disconnector. More specifically, in this open position, there is provided a prestressing force which tends to bring together the two parallel arms 2 and 3, and the bar 19 is clamped by the metal plates of each pair of flexible fingers screw to screw. This allows an increase in the static nip exerted on the fixed contact 4 in the absence of fault current in the disconnector.
- the width l 2 of the fixed contact in this case the diameter of the cylinder forming this contact, is therefore necessarily greater than the width of the bar 19.
- the earthing switch of the FIG. 6 is diagrammatically represented by a view lateral perpendicular to the plane formed by the arm elbow 3 of the disconnector.
- shorter branches of each bent arm 2 or 3 are split longitudinally along their entire length to form flexible fingers, and the slots become extend beyond the elbow over much of the branch the longest of each arm.
- Fingers Flexible hoses are thus bent with the same shape in L that arms, which allows to increase the elasticity of each finger and increase the length effective leverage for amplification of the Electrodynamic pinching by a lever effect. This allows to obtain an electrodynamic clamp producing a contact pressure on the fixed contact 4 which is greater than that obtained in the first type of production.
- the choice of one-piece type joining means such as clevis 13 makes it possible to make a knot of hinge more solid and a manufacturing cost less than the completion of a spacer E with bolts.
- Wedge 9 located behind the bent arm 3 in this side view, is crossed by two bolts 16 and is free to slide between the two crank arms parallel with a little play along the stems of bolts.
- this little game is twice the spacing j. Function of this hold 9 has been explained previously for the first type of realization.
- an earthing switch of the second type according to the invention is shown in a view partial perspective.
- This embodiment advantageous is almost identical to the one with Figures 6 and 7, and corresponds exactly to one or other of the achievements represented respectively in Figures 9 and 10.
- the bar 20 forming the single-phase driver of line that supports the fixed contact 4.
- the disconnector earth is in an intermediate open position, and the mobile contact assembly 1 is in the process of rotate to operate for example closing the switch.
- FIG. 8 A partial view from above of the disconnector FIG. 8 is shown in FIG. in a position where the moving contact assembly is about to come connect with the fixed contact 4. Shim 9 is not shown in this view.
- the screed 13 includes a rectangular 13C plate whose face inside the clevis has two shoulders 13A and 13B parallels on the two opposite edges that are intended to ensure a mechanical connection with the flexible fingers and their metal plates 10 '.
- Each shoulder 13A or 13B has three holes 18 each penetrated by a rod 14 able to ensure this mechanical connection between the clevis and a finger such as 21 or 31.
- a sleeve of insulating material 24 is interposed between the wall of a hole 18 and the rod 14 which enters this hole.
- the portion of the rod that enters the hole 18 is not threaded and is constituted by the end of a bolt that allows the clamping of a plate 10 'against a finger such as 21 or 31 in combination with means
- the open U-shaped slot has a flared inlet which is formed by the metal plates 10 ', each plate having a tapered end at the entrance to the slot.
- Each plate has near its beveled end a threaded hole for fixing the plate on an arm 2 or 3 by means of a bolt 17. It is visible that the gap 1 between two plates 10 'opposite, in the open position of the disconnector, is less than the width of the fixed contact 4.
- the clamping means 25 have an abutment member arranged to limit to a predetermined distance d the sliding of the rod 14 in said insulating sleeve 24 when closing the disconnector in the presence of a strong current.
- the width of the bar 19 determines the spacing l 1 between two plates 10 'facing.
- the bar 19 is preferably made of the same electrically insulating material, and here has portions that have a substantially rectangular section to form a stop element 8 'for the fixed contact 4.
- an insulating bar only with a cross section. U is possible, provided to provide another insulating material in the inner space of the bar to cover the head of the bolt 15 and provide the stop function.
- the electrical insulation properties of the bar 19 and its stop element 8 ' make it possible on the one hand to isolate, with respect to the joining means, each end of an arm 2 or 3, and on the other hand to isolate between them the two respective ends of the arms 2 and 3.
- each rod 14 has a threaded first portion 14A which cooperates with the means clamping device 25 to assist in fixing a metal plate 10 'on a flexible finger, and a second portion 14B unthreaded slidable in the insulating sleeve 24.
- the assembly of the yoke 13 is facilitated in this embodiment, because the rod 14 can be introduced from the right of the sleeve 24 in the figure, contrary to the realization of the Figure 9.
- the stop member 26 of the clamping means 25 is arranged to limit to a predetermined distance d the sliding of the second portion 14B of the rod in sleeve 24.
- each rod 14 alone ensures times the mechanical connection function between the clevis 13 and a flexible finger and the fixing function of a 10 'metal plate on one finger, while these two functions are exerted by two separate bolts in the device of Figure 6.
- This construction allows also to reduce the height of the bar 19 in the plane of the figure, thus reducing the distance L2 shown in Figure 6, while ensuring that the contact area between the fixed contact 4 and the plates 10 'does not have a bolt hole. amplification by leveraging the electrodynamic pinch of the fixed contact is thus increased compared to device of Figure 6.
- the clevis 13 could be replaced by a metal form frame rectangular, the amounts perpendicular to the fingers 21 and 31 would be pierced with holes having the function of the holes 18 of the shoulders 13A and 13B.
- a insulating material covering the upper and lower lower part of the frame could be sufficient to ensure insulating stop element function for contact fixed.
- an earthing switch allows the entire locking system in the closed position is provided by the contact mobile.
- the open position of the disconnector it is possible to easily maintain the desired dielectric distance in the interval between the fixed contact and the mobile contact since the contact fixed may be small.
- the axis of rotation of the movable contact can be arranged to a distance relatively close to the bar that supports the fixed contact. In this way, one can ensure with a small footprint the holding of high voltages in an open configuration of the earthing switch.
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- Tumbler Switches (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
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- Forklifts And Lifting Vehicles (AREA)
- Operation Control Of Excavators (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
- chaque bras coudé en L est fendu longitudinalement sur les deux branches du L pour former les doigts flexibles sur la majeure partie d'un bras, de façon à obtenir encore plus de souplesse dans l'écartement des extrémités des doigts et assurer un contact électrique optimal entre le contact fixe et le contact mobile du sectionneur ;
- les moyens de jointure mécaniquement reliés aux deux extrémités respectives des deux bras coudés comprennent une chape rigide assurant la fonction d'un noeud de charnière pour une pince électrodynamique dont les leviers sont constitués par les doigts flexibles des deux bras, cette chape comprenant une plaque rectangulaire dont une face présente deux épaulements parallèles sur deux bords opposés, chaque épaulement comportant au moins deux trous pénétrés chacun par une tige apte à assurer une liaison mécanique entre la chape et un doigt flexible ;
- un élément de butée électriquement isolant porté par le contact mobile est constitué par une barre en matériau isolant qui est fixée au milieu de la plaque de la chape parallèlement aux deux épaulements, cette barre étant prise en étau par les doigts flexibles des deux bras parallèles dans la position ouverte du sectionneur ;
- des plaques métalliques sont fixées aux doigts flexibles des deux bras parallèles, chaque plaque métallique présentant une extrémité biseautée ou arrondie du côté par lequel le contact fixe est apte à être engagé dans le contact mobile, et l'écartement entre deux plaques métalliques en vis à vis dans la position ouverte du sectionneur est inférieur à la largeur du contact fixe ;
- les deux bras parallèles sont prolongés axialement sur leurs branches les plus longues par une tige conductrice montée rotative autour de l'axe de rotation de l'ensemble de contact mobile pivotant. D'autres types ou modes de réalisation d'un sectionneur de terre selon l'invention sont décrits plus en détail dans la description qui suit. Un premier type de réalisation est décrit plus en détail et est illustré par les dessins des figures 3 à 5. Un second type de réalisation englobant le mode de réalisation avantageux résumé précédemment est aussi décrit plus en détail et est illustré par les dessins des figures 6 à 10.Les figures 1 et 2 illustrent le principe électrotechnique de la force élémentaire exploité par l'invention.
- La figure 3 montre une vue partielle en perspective d'un sectionneur de terre selon l'invention dans un premier type de réalisation.
- La figure 4 montre une vue en coupe longitudinale du sectionneur de terre de la figure 3, selon un plan parallèle à un bras en L du sectionneur.
- La figure 5 montre une vue partielle de dessus du sectionneur de terre de la figure 3.
- La figure 6 représente schématiquement une vue partielle de dessus d'un sectionneur de terre selon l'invention dans un second type de réalisation, et illustre le principe du pincement électrodynamique amplifié par un effet de levier.
- La figure 7 représente schématiquement une vue latérale du sectionneur de terre de la figure 6.
- La figure 7a représente très schématiquement une vue de dessus d'un élément visible latéralement sur la figure 7.
- La figure 8 montre une vue partielle en perspective d'un sectionneur de terre selon l'invention dans un mode de réalisation avantageux du second type.
- La figure 9 montre une vue partielle de dessus du sectionneur de terre de la figure 8.
- La figure 10 représente schématiquement un détail d'une variante au sectionneur de terre de la figure 9.
Claims (18)
- Sectionneur de terre comprenant un ensemble de contact (1) mobile pivotant autour d'un axe de rotation et un contact fixe (4) agencé pour être électriquement connecté à une extrémité dudit ensemble de contact (1) mobile lorsque cet ensemble est amené dans la position de fermeture du sectionneur, caractérisé en ce que ledit ensemble de contact (1) mobile comprend deux bras (2, 3) électriquement conducteurs sensiblement parallèles qui sont coudés pour former chacun au moins approximativement un L, chaque bras coudé (2, 3) comprenant au moins un doigt flexible (2B1, 2B2, 3B1, 3B2 ; 21, 23, 31, 33) qui s'étend au moins sur la branche la plus courte du L, ledit contact fixe (4) étant disposé de façon à être engagé entre au moins une paire de doigts flexibles dans la position de fermeture du sectionneur, et en ce que des moyens de jointure (E, 13) sont mécaniquement reliés aux deux extrémités respectives des deux bras coudés (2, 3) sur les branches les plus courtes des L afin de permettre un effet de levier qui amplifie le pincement électrodynamique exercé sur le contact fixe (4) par lesdits doigts flexibles lorsque un courant de court-circuit ou courant de défaut parcourt lesdits bras (2, 3).
- Sectionneur de terre selon la revendication 1, dans lequel le contact fixe (4) et l'ensemble de contact (1) mobile sont disposés l'un par rapport à l'autre de telle manière qu'en position de fermeture complète du sectionneur, le contact fixe soit en appui contre un élément de butée (8, 8') électriquement isolant porté par l'ensemble de contact mobile.
- Sectionneur de terre selon l'une des revendications 1 et 2, dans lequel le contact fixe (4) a la forme d'un plot sensiblement cylindrique dont l'axe définit une ligne (lv) sensiblement verticale, et dans lequel ladite ligne s'étend axialement en direction de l'axe de rotation de l'ensemble de contact (1) mobile.
- Sectionneur de terre selon l'une des revendications 1 à 3, dans lequel les branches les plus courtes (2B, 3B) de chaque bras coudé (2, 3) en forme de L sont fendues longitudinalement pour former des doigts flexibles (2B1, 2B2, 3B1, 3B2).
- Sectionneur de terre selon la revendication 4, dans lequel les branches les plus longues de chaque bras coudé (2, 3) en forme de L sont aussi fendues longitudinalement, de façon à obtenir des doigts flexibles (21, 23, 31, 33) coudés en forme de L.
- Sectionneur de terre selon l'une des revendications 1 à 4, dans lequel lesdits moyens de jointure sont constitués d'une entretoise (E) qui comprend un manchon (8) en matière électriquement isolante qui entoure un boulon (6) traversant deux doigts flexibles (2B1, 3B1 ; 2B2, 3B2) des deux bras parallèles (2, 3).
- Sectionneur de terre selon la revendication 5, dans lequel lesdits moyens de jointure comprennent une chape (13) rigide assurant la fonction d'un noeud de charnière pour une pince électrodynamique dont les leviers sont constitués par les doigts flexibles des deux bras parallèles (2, 3).
- Sectionneur de terre selon la revendication 7, dans lequel ladite chape (13) comprend une plaque (13C) rectangulaire dont une face présente deux épaulements (13A, 13B) parallèles sur deux bords opposés, chaque épaulement comportant au moins deux trous (18) pénétrés chacun par une tige (14) apte à assurer une liaison mécanique entre ladite chape et un doigt flexible d'un bras coudé (2, 3).
- Sectionneur de terre selon la revendication 8, dans lequel un manchon en matériau isolant (24) est intercalé entre la paroi d'un trou (18) et la tige (14) qui pénètre dans ce trou.
- Sectionneur de terre selon l'une des revendications précédentes, dans lequel des plaques métalliques (10') sont fixées aux doigts flexibles des deux bras parallèles (2, 3), chaque plaque métallique présentant une extrémité biseautée ou arrondie du côté par lequel le contact fixe est apte à être engagé dans l'ensemble de contact mobile, et dans lequel l'écartement (l1) entre deux plaques métalliques (10') en vis à vis dans la position ouverte du sectionneur est inférieur à la largeur (12) du contact fixe (4).
- Sectionneur de terre selon la revendication 10 prise en combinaison avec la revendication 9, dans lequel ladite tige (14) possède une première partie (14A) filetée qui coopère avec des moyens de serrage (25) pour contribuer à la fixation d'une plaque métallique (10') sur un doigt flexible (31) et une seconde partie (14B) non filetée apte à coulisser dans ledit manchon isolant (24), et dans lequel lesdits moyens de serrage (25) possèdent un organe de butée (26) agencé pour limiter à une distance prédéterminée (d) le coulissement de ladite seconde partie (14B) dans ledit manchon isolant (24) lors de la fermeture du sectionneur en présence d'un fort courant.
- Sectionneur de terre selon la revendication 11, dans lequel ladite distance prédéterminée (d) est voisine de l'amplitude (e) d'écartement d'un doigt flexible (21, 31) définie comme la moitié de la différence entre l'écartement (l1) entre deux plaques métalliques (10') et la largeur (12) du contact fixe (4).
- Sectionneur de terre selon l'une des revendications 10 à 12 prise en combinaison avec la revendication 8, dans lequel l'élément de butée (8') électriquement isolant qui est porté par l'ensemble de contact mobile est solidaire d'une barre électriquement isolante (19) qui présente des parties à section en U et qui est fixée au milieu de la plaque (13C) de ladite chape (13) parallèlement aux deux épaulements (13A, 13B), et dans lequel ladite barre isolante est prise en étau par les doigts flexibles des deux bras parallèles (2, 3) dans la position ouverte du sectionneur.
- Sectionneur de terre selon la revendication 13, dans lequel ledit élément de butée (8') est constitué par des parties de ladite barre isolante (19) qui possèdent une section sensiblement rectangulaire.
- Sectionneur de terre selon l'une des revendications précédentes, dans lequel une cale (9) est disposée entre les deux bras parallèles (2, 3) au voisinage de leurs coudes et définit un espacement minimal autorisé entre les deux bras lorsque ledit ensemble de contact (1) mobile est parcouru par un courant de court-circuit.
- Sectionneur de terre selon l'une des revendications précédentes, dans lequel les deux bras parallèles (2,3) sont prolongés axialement sur leurs branches les plus longues par une tige conductrice (12) montée rotative autour de l'axe de rotation de l'ensemble de contact (1) pivotant.
- Sectionneur de terre selon la revendication 16, dans lequel en position de fermeture complète du sectionneur, ladite tige conductrice (12) est inclinée par rapport à une position verticale de non équilibre.
- Sectionneur de terre selon la revendication 5, dans lequel chaque bras coudé en forme de L comprend trois doigts flexibles (31, 32, 33).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0450491 | 2004-03-10 | ||
FR0450491A FR2867603B1 (fr) | 2004-03-10 | 2004-03-10 | Sectionneur de terre pivotant a insertion directe et a mouvement simple |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1575067A1 true EP1575067A1 (fr) | 2005-09-14 |
EP1575067B1 EP1575067B1 (fr) | 2006-09-27 |
Family
ID=34814591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05101787A Not-in-force EP1575067B1 (fr) | 2004-03-10 | 2005-03-08 | Sectionneur de terre pivotant à insertion directe et à mouvement simple |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1575067B1 (fr) |
AT (1) | ATE341090T1 (fr) |
DE (1) | DE602005000144T2 (fr) |
FR (1) | FR2867603B1 (fr) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007023093A1 (fr) | 2005-08-26 | 2007-03-01 | Siemens Aktiengesellschaft | Dispositif de contact presentant un element de limitation qui limite la deviation de la piece de contact mobile |
EP2707890A4 (fr) * | 2011-05-11 | 2015-03-18 | Mikhail Sotnikov | Lame de déconnexion haute tension pour usage extérieur avec isolation aérienne |
CN104715958A (zh) * | 2013-12-16 | 2015-06-17 | 西门子公司 | 一种接地开关及其隔离开关 |
RU2580937C1 (ru) * | 2014-12-22 | 2016-04-10 | Общество с ограниченной ответственностью "Эльмаш (УЭТМ)" | Комбинированный газонаполненный аппарат высокого напряжения |
WO2016082043A1 (fr) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | Interrupteur sectionneur télescopique haute tension isolé à l'air avec un contact mobile à alimentation en pression |
WO2016082042A1 (fr) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | Interrupteurs-sectionneurs télescopiques à haute tension isolés par air pour bus à phase isolée |
WO2018024439A1 (fr) * | 2016-08-03 | 2018-02-08 | Siemens Aktiengesellschaft | Bras de contact pour appareil de commutation haute tension et procédé pour son utilisation |
CN108807107A (zh) * | 2018-09-04 | 2018-11-13 | 广东电网有限责任公司 | 熔断开关及电气设备 |
CN112420437A (zh) * | 2020-11-23 | 2021-02-26 | 西安西电开关电气有限公司 | 一种具有辅助支撑的双闭锁装置及大容量开关设备 |
CN113192789A (zh) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | 一种柱上隔离开关及其接线端子 |
CN118471722A (zh) * | 2024-07-11 | 2024-08-09 | 浙江正泰电气科技有限公司 | 一种触头组件及隔离开关 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011077768A1 (de) | 2011-06-17 | 2012-12-20 | Siemens Aktiengesellschaft | Freiluftschaltgerät |
DE102016207120A1 (de) * | 2016-04-27 | 2017-11-02 | Siemens Aktiengesellschaft | Elektrische Kontaktanordnung |
Citations (6)
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CH142858A (fr) * | 1929-02-16 | 1930-10-15 | Kesl Charles | Dispositif de contact pour appareil électrique. |
DE643542C (de) * | 1934-08-04 | 1937-04-10 | Siemens Schuckertwerke Akt Ges | Schubtrennschalter |
DE1218579B (de) * | 1962-05-09 | 1966-06-08 | Elek Scher App Fab | Einsaeulentrenner fuer Hochspannungsanlagen |
DE2217981A1 (de) * | 1971-04-21 | 1972-10-26 | Elektrischer Festkontakt fur Kontakt | |
DE3204438A1 (de) * | 1982-02-08 | 1983-08-18 | Siemens AG, 1000 Berlin und 8000 München | Elektrischer trenn- oder erdungsschalter, bestehend aus jeweils um einen drehpunkt beweglichen schaltmessern und messerkontakten |
DE4436120A1 (de) * | 1994-09-27 | 1996-03-28 | Thomas Dipl Ing Schoenemann | Schaltkontakt mit spreizbarem Doppelmesser |
-
2004
- 2004-03-10 FR FR0450491A patent/FR2867603B1/fr not_active Expired - Fee Related
-
2005
- 2005-03-08 AT AT05101787T patent/ATE341090T1/de not_active IP Right Cessation
- 2005-03-08 DE DE602005000144T patent/DE602005000144T2/de active Active
- 2005-03-08 EP EP05101787A patent/EP1575067B1/fr not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH142858A (fr) * | 1929-02-16 | 1930-10-15 | Kesl Charles | Dispositif de contact pour appareil électrique. |
DE643542C (de) * | 1934-08-04 | 1937-04-10 | Siemens Schuckertwerke Akt Ges | Schubtrennschalter |
DE1218579B (de) * | 1962-05-09 | 1966-06-08 | Elek Scher App Fab | Einsaeulentrenner fuer Hochspannungsanlagen |
DE2217981A1 (de) * | 1971-04-21 | 1972-10-26 | Elektrischer Festkontakt fur Kontakt | |
DE3204438A1 (de) * | 1982-02-08 | 1983-08-18 | Siemens AG, 1000 Berlin und 8000 München | Elektrischer trenn- oder erdungsschalter, bestehend aus jeweils um einen drehpunkt beweglichen schaltmessern und messerkontakten |
DE4436120A1 (de) * | 1994-09-27 | 1996-03-28 | Thomas Dipl Ing Schoenemann | Schaltkontakt mit spreizbarem Doppelmesser |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007023093A1 (fr) | 2005-08-26 | 2007-03-01 | Siemens Aktiengesellschaft | Dispositif de contact presentant un element de limitation qui limite la deviation de la piece de contact mobile |
CN101248503B (zh) * | 2005-08-26 | 2011-07-06 | 西门子公司 | 带有限制可移动的接触件偏转的限制元件的触点装置 |
EP2707890A4 (fr) * | 2011-05-11 | 2015-03-18 | Mikhail Sotnikov | Lame de déconnexion haute tension pour usage extérieur avec isolation aérienne |
CN104715958A (zh) * | 2013-12-16 | 2015-06-17 | 西门子公司 | 一种接地开关及其隔离开关 |
CN104715958B (zh) * | 2013-12-16 | 2017-12-12 | 西门子公司 | 一种接地开关及其隔离开关 |
WO2016082042A1 (fr) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | Interrupteurs-sectionneurs télescopiques à haute tension isolés par air pour bus à phase isolée |
WO2016082043A1 (fr) * | 2014-11-26 | 2016-06-02 | Mikhail Sotnikov | Interrupteur sectionneur télescopique haute tension isolé à l'air avec un contact mobile à alimentation en pression |
RU2580937C1 (ru) * | 2014-12-22 | 2016-04-10 | Общество с ограниченной ответственностью "Эльмаш (УЭТМ)" | Комбинированный газонаполненный аппарат высокого напряжения |
WO2018024439A1 (fr) * | 2016-08-03 | 2018-02-08 | Siemens Aktiengesellschaft | Bras de contact pour appareil de commutation haute tension et procédé pour son utilisation |
CN108807107A (zh) * | 2018-09-04 | 2018-11-13 | 广东电网有限责任公司 | 熔断开关及电气设备 |
CN108807107B (zh) * | 2018-09-04 | 2024-01-09 | 广东电网有限责任公司 | 熔断开关及电气设备 |
CN112420437A (zh) * | 2020-11-23 | 2021-02-26 | 西安西电开关电气有限公司 | 一种具有辅助支撑的双闭锁装置及大容量开关设备 |
CN113192789A (zh) * | 2021-03-24 | 2021-07-30 | 天津平高智能电气有限公司 | 一种柱上隔离开关及其接线端子 |
CN113192789B (zh) * | 2021-03-24 | 2023-05-12 | 天津平高智能电气有限公司 | 一种柱上隔离开关及其接线端子 |
CN118471722A (zh) * | 2024-07-11 | 2024-08-09 | 浙江正泰电气科技有限公司 | 一种触头组件及隔离开关 |
Also Published As
Publication number | Publication date |
---|---|
FR2867603B1 (fr) | 2006-06-02 |
ATE341090T1 (de) | 2006-10-15 |
EP1575067B1 (fr) | 2006-09-27 |
DE602005000144T2 (de) | 2007-10-25 |
FR2867603A1 (fr) | 2005-09-16 |
DE602005000144D1 (de) | 2006-11-09 |
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