EP3095125B1 - Trennschalter zur erkennung des defekts einer beschleunigungsfeder eines lichtbogenkontakts - Google Patents

Trennschalter zur erkennung des defekts einer beschleunigungsfeder eines lichtbogenkontakts Download PDF

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Publication number
EP3095125B1
EP3095125B1 EP15700548.9A EP15700548A EP3095125B1 EP 3095125 B1 EP3095125 B1 EP 3095125B1 EP 15700548 A EP15700548 A EP 15700548A EP 3095125 B1 EP3095125 B1 EP 3095125B1
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EP
European Patent Office
Prior art keywords
contact
mobile
arcing
end stop
relative
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Application number
EP15700548.9A
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English (en)
French (fr)
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EP3095125A1 (de
Inventor
Mathieu Bernard
Frédéric Roussel
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication of EP3095125A1 publication Critical patent/EP3095125A1/de
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    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • 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
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers

Definitions

  • the present invention relates to the field of electrical switchgear, in particular the disconnector or earthing switch type, preferably high voltage. Even more preferentially, the invention relates to a high-voltage disconnector of the GIS (gas insulated switchgear) type, that is to say located in a metal or shielded casing with electrical insulation conferred by gas. SF6 or equivalent.
  • GIS gas insulated switchgear
  • an electrical switchgear of the disconnector or earthing switch type comprises an electrically conductive assembly which is moved at a constant translational speed during each opening operation and during each closing operation.
  • the conductor assembly which is generally equipped with a permanent contact and an arcing contact, undergoes mechanical and electrical stresses that gradually generate its degradation. This phenomenon is also observed on the other permanent contact and the other arcing contact of the apparatus, said fixed contacts.
  • the document FR 2 547 107 proposes an electrical apparatus with a fixed arc contact coupled to a spring, which makes it possible to accelerate the spacing speed of the two arcing contacts at the time of their separation. Nevertheless, the fixed arcing contact can no longer really be regarded as fixed, since it is slidably mounted on the fixed frame of the apparatus. On the other hand, conventional designs of switchgear usually do not monitor the area of the fixed contact, so that the detection of a possible anomaly on the spring is not possible. This seems unacceptable, because a break of the spring undetected would cause a dangerous malfunction of switchgear.
  • EP-A-0348645 discloses an electrical switchgear apparatus according to the preamble of claim 1. There is therefore a need for optimization of these switchgear, in particular to reduce the adverse effects related to the formation of arcing between contacts during opening operations.
  • the invention therefore aims to at least partially overcome the disadvantages mentioned above, relating to the achievements of the prior art.
  • the subject of the invention is an electrical switchgear, in particular a disconnector, comprising two electric arc contacts designed to be brought from a closed position to an open position during an operation. opening, relative displacement in translation along a central axis of these arc contacts.
  • one of the two electrical arcing contacts is a moving arcing contact making integral part of an electrically conductive moving assembly also comprising another body movably slidable relative to the moving arcing contact in a direction of movement of this electrically conductive assembly, the latter further comprising resilient return means interposed between said contact movable arc and said other body, said apparatus being designed such that during an opening operation, said resilient biasing means can first store energy by relative displacement between said arc contact mobile and said other body, then release the stored energy to cause an acceleration of said moving arc contact.
  • said elastic return means place said movable arcing contact and said other body in a specific relative position, the apparatus being designed so that following the release of energy by the elastic means of recall during the opening operation, if said movable arcing contact and said other body do not regain their determined relative position, said other body is prevented by abutment from reaching said open position.
  • the invention is first of all remarkable in that it makes it possible to vary the speed of said arcing contact of the moving assembly, during the same opening operation, by means of the acceleration caused by the release of energy from the elastic return means. Consequently, this controlled variation can be determined so as to to best limit the mechanical and electrical wear of the electrically conductive assembly.
  • the release of energy is preferentially initiated after the separation of the permanent contacts, and during the separation of the arcing contacts, that is to say initiated at the precise moment of the separation of the contacts. arcs or before that moment, and completed after they are separated.
  • the speed of the moving arc contact embossed on the electrically conductive assembly is even higher during this critical phase of the opening operation, which limits the damage due to electrical stresses.
  • This feature of the invention is also advantageous in that it allows a variation of the speed of said arc contact of the moving assembly, while moving at a constant speed of translation the point of attachment of a device of the invention. driving the electrically conductive moving assembly. Consequently, this drive device can advantageously incorporate a motor driven at constant speed, even if a variable speed could be implemented, without departing from the scope of the invention.
  • the acceleration spring is not arranged on the side of the fixed elements, but on the assembly comprising the movable electrodes.
  • the acceleration spring is not arranged on the side of the fixed elements, but on the assembly comprising the movable electrodes.
  • a position sensor or a visual detection of this particular position of said other body then makes it possible to easily detect the failure of the elastic return means used for the acceleration of the moving arcing contact.
  • the invention therefore has a so-called "positive action" design.
  • this solution reduces the overall size of the equipment compared to those encountered in the prior art.
  • the modification made to the fixed contact to make it slightly mobile causes a significant increase in the dimensioning, especially for purposes of translational guidance of this contact.
  • the impact on the dimensioning is much smaller because this assembly already has a large bulk, in particular a long length to ensure its guidance in translation.
  • the speed of the electrically conductive assembly can be slow, until the separation of the permanent contacts in order to limit the mechanical wear of these, then rise to limit the electrical wear of the arcing contacts.
  • said other body comprises a support element of at least one travel stop mounted movably on said support element between a withdrawal position and a locking projecting position, said moving arc contact being equipped with at least one an actuator which, when said movable arcing contact and said other body occupy their determined relative position, cooperates with the travel stopper by maintaining it in its retracted position.
  • a fixed body of the apparatus comprises at least one complementary abutment provided to retain said travel stop when it occupies its protruding blocking position reached in the event of absence of cooperation with the actuating member, said complementary stop holding said travel stop so that said other body is held at a distance from its open position.
  • elastic return means are interposed between the support member and the travel stop, so as to force it towards its protruding locking position.
  • the apparatus comprises a position sensor of said other body relative to the fixed body of the apparatus.
  • This position sensor can be connected to a control unit capable of generating an alert when said other body does not reach its open position, due to a failure of the elastic return means.
  • said apparatus further comprises rotation means for causing a rotation of the arc contacts with respect to each other along said central axis, at least after the separation of the arcing contacts during an opening operation.
  • the proposed solution is advantageous in that it allows, by relative rotation of the two arcing contacts, to stretch the electric arc occurring between them during an opening operation. This stretch promotes the extinction of the arc, and also distributes the electrical wear on these arcing contacts. The detrimental effects associated with the repetition formation of arcing between the arcing contacts are therefore still largely mitigated by this feature, and the lifetime of these contacts is still advantageously improved.
  • said rotation means are designed to initiate the relative rotation of the two arcing contacts during the separation of the arcing contacts, ie initiated at the precise instant of the separation of the contacts. arcs or before that moment.
  • the apparatus design is retained so that the rotation is stopped at a moment following that of the extinction of the electric arc.
  • this primer takes place preferably after the start of the opening operation, and that the rotation is stopped before the end of this same operation.
  • the relative rotation takes place over a period corresponding to a few milliseconds over a total opening stroke duration of approximately 10s, and / or over a distance corresponding to one third of the total stroke of the moving assembly during the opening operation.
  • the design of the apparatus is such that no rotation occurs during the closing operations.
  • said rotation means are designed so that the relative angular position between the two arcing contacts differs between that adopted in a closed position of the arcing contacts, and that adopted in the position of closing of the cycle directly consecutive. This further distributes the electrical wear on the arcing contacts, the life of which is further improved.
  • the equipment may be designed so that the angular extent of the relative rotation after each cycle is such that 360 is not a multiple of the value of this extent. With such a principle, after a complete revolution of relative rotation between the arcing contacts, generally obtained after several cycles, the relative position between the two arcing contacts is not the same as that adopted at the beginning of the revolution. previous. This angular extent is preferably identical to each cycle.
  • the relative rotation between the arcing contacts can be obtained by rotating the two contacts, or only one of them, whether it is movable in translation or fixed.
  • said rotation means are designed to apply a relative rotation of the two arcing contacts only during the energy release phase of said elastic return means, and even more preferably during a very large part of this phase of release of energy.
  • said rotating means comprise a finger system housed in a helical groove, said relative rotation of the two arcing contacts operating automatically by moving the finger in the helical groove, during sliding between said other body and the movable arcing contact, during the energy release phase of said elastic return means.
  • this principle provides a simple and effective solution for converting the sliding motion of the moving arc contact into a helical motion, including the desired rotation of the arc contact.
  • This principle of finger and helical groove, or the like, is otherwise applicable even when the apparatus does not have a system for accelerating the moving arcing contact.
  • said system also comprises a ring surrounding the movable arcing contact, said ring being integral with the end of the finger opposite to that housed in said groove made in said other body.
  • said ring is connected to the movable arcing contact so that when it is rotated in a first direction of rotation, it carries with it the arcing contact in rotation along the central axis, and so that when it is rotated in a second direction of rotation opposite to the first, it causes no rotation of the arc contact.
  • said elastic return means of the electrically conductive assembly comprise at least one compression or traction spring.
  • said other body of the electrically conductive assembly is intended to be connected to a point of attachment of a driving device of said movable electrically conductive assembly.
  • said other body comprises the permanent electrical contact.
  • the apparatus comprises abutment means making it possible, during an opening operation, to block the translational movement of said movable arcing contact with respect to a fixed body of the apparatus, and said other body is equipped with unlocking means adapted to release said abutment means after said other body has been moved relative to the movable arcing contact by a predetermined distance.
  • said abutment means comprise at least a first movable abutment mounted on said movable arcing contact, and at least one second abutment mounted on said fixed body of the apparatus, and said unlocking means take the form of at least one ramp capable of displacing, by contact, the first stop relative to the moving arc contact.
  • the first stop is a roller.
  • the subject of the invention is a method for implementing an opening operation using an apparatus as described above, carried out so that, following the release of energy by the means return elastics, if said movable arcing contact and said other body do not regain their determined relative position occupied in the closed position, said other body is prevented by abutment from reaching said open position.
  • this disconnector can be a disconnector earth, preferably a high-voltage disconnector type GIS.
  • the disconnector 1 comprises a cutoff chamber 2 shown only partially, enclosed in an enclosure containing an insulating gas such as SF6 gas or any other gaseous mixture deemed appropriate.
  • the chamber 2 encloses a fixed permanent contact 4a, as well as a fixed electric arc contact 5a, intended to be located radially inwardly with respect to the permanent contact.
  • This assembly 6 contains an electrically conductive moving assembly 6, connected to a fixed body 8 in which it is movable in translation, in a direction of displacement represented by the arrow 11.
  • This assembly 6 has an end equipped with a movable permanent contact 4b in the form of a tube, and also comprises a moving electric arc contact 5b arranged radially inwardly with respect to the permanent contact 4b. These two contacts 4b, 5b are intended to cooperate with the aforementioned fixed contacts.
  • the assembly 6 generally takes the form of a sliding cylinder, like the piston of a cylinder, in a cylindrical housing 10 of the body 8.
  • the permanent contact 4b forms the outer body of the assembly, through which passes the arc contact 5b. More specifically, the permanent contact 4b is integral with a dielectric element 13 fixed on an inner flange 14 of this permanent contact 4b. In contrast, the latter is equipped with a dielectric bottom 15. These elements 4b, 13 and 15 together form a fixed body, said "other body 4b '".
  • the dielectric element 13 has an annular-shaped front portion fixed on the flange 14, which is extended by two angular cylinder sectors 7, diametrically opposite on either side of the plane P2. The rear end of these sectors 7, which extend longitudinally, is fixed on the dielectric bottom 15.
  • a bore 12 oriented in the direction 11, and slidingly housing the arc contact 5b.
  • the latter is slidably mounted relative to the permanent contact 4b in the direction of displacement 11. More generally, it is slidably mounted relative to the assembly of the other body 4b ', in the direction of displacement 11.
  • the electrically conductive assembly 6 comprises elastic return means, such as a compression spring 16, forcing the arc contact 5b to move towards a first end position relative to the permanent contact 5b, corresponding to the position in which it is located retracted to the maximum in the cylinders of the permanent contact 4b, as shown on the Figures 2a and 2b .
  • elastic return means such as a compression spring 16 forcing the arc contact 5b to move towards a first end position relative to the permanent contact 5b, corresponding to the position in which it is located retracted to the maximum in the cylinders of the permanent contact 4b, as shown on the Figures 2a and 2b .
  • This first position towards which the spring 16 tends to push the arc contact 5b, therefore corresponds to a position in which this contact is forced against the bottom 15 of the other body 4b '.
  • the spring 16 disposed around the arc contact 5b is supported by one of its ends on an abutment surface 18 of this contact, and bears against the other of its ends on the flange 14 of the permanent contact 4b.
  • the spring 16 is thus arranged radially between this contact 4b and the dielectric element 13.
  • the abutment surface 18 is formed at the end of a rod 17 of the contact 5b. It is part of a base 20 of the arc contact 5b, in the general shape of a disc. The base 20 linearly guides the contact 5b while allowing the rod 17 to pivot freely, along the central axis 19 of the arc contacts corresponding also to the central and longitudinal axis of the assembly of the disconnector 1.
  • this contact in order to put the permanent contact 4b in motion, in order to implement the opening and closing operations of the disconnector 1, this contact is connected at its rear end to a point of attachment 22 of a disconnecting device.
  • This device 30 may be made in a conventional manner, for example in order to apply a constant translation speed at the point of attachment 22, in the direction 11, during each closing operation and each opening operation.
  • the fixed part 8 of the disconnector is also equipped with uprights 34 parallel to the axis 19, and arranged diametrically opposite on both sides of the plane P1. These two uprights 34 are fixed on a fixed base 35 and each form, at the opposite end, respectively two axial stops 38. These form stop means jointly with rollers 23, the latter constituting the first stops, and the stops 38 forming second stops.
  • the abutments 23, 38 are opposite and aligned in pairs in the direction 11, implying that the two rollers 23 are also arranged diametrically opposite, on either side of the plane P1.
  • These two rollers 23 are each mounted movably on the base 20 in the form of a disc.
  • Elastic return means, such as one or more compression springs 24 force the rollers 23 to move towards the outside of the base 20. They project from this base, radially outside, when the disconnector is located in the closure configuration shown on the Figures 2a and 2b .
  • the rollers 23 may bear against the inner surface of the permanent contact 4b.
  • the stops 23, 38 are at a distance from each other, and do not cooperate with each other. However, as will be detailed below, these stops are made to cooperate temporarily two by two during a specific phase the opening operation, before longitudinal ramps 40 provided on the other body 4b 'move by contact the rollers 23, thereby to release the first and second stops.
  • the ramps 40 therefore fulfill a function of unlocking the stop means.
  • the disconnector 1 is equipped with a system 50 allowing an automatic and controlled rotation of the arc contact 5b, and more precisely of its rod 17 along the axis 19.
  • the system 50 first comprises a ring 52 integral in translation with the rod 17 which it surrounds. In addition, it is integral in rotation of the same rod, but only in one of the two directions of rotation. Therefore, in a first direction of rotation of the ring 52 along the axis 19, this ring carries with it the arc contact rod, while in the other direction of rotation, the ring 52 rotates but the rod 17 remains fixed in rotation.
  • the ring 52 centered on the axis 19 fixedly bears a finger (referenced 54 on the figure 4c which will be described later).
  • This finger is oriented radially and its free end, opposite to that integral with the ring 52, is housed in a helical groove 56 of axis 19 formed through the dielectric element 13.
  • two fingers carried by the ring 52 are provided, cooperating with two helical grooves 56 made respectively through the two angular sectors 7 of the dielectric element 13.
  • the two identical grooves 56 are initiated in front of angular sectors 7, and extend rearward helically before being extended by a small straight portion parallel to the direction 11.
  • the disconnector 1 is shown in the closed position, in which the electrical contacts cooperate in pairs.
  • the arc contact 5b is forced against the bottom 15 of the other body 4b 'by the compression spring 16, bringing the front ends of the arc contact 5b and the permanent contact 4b to be substantially in the same plane, orthogonal to the central axis 19.
  • the displacement stops 23, 38 come into contact two by two. This moment corresponds to that schematized that the figures 3a and 3b .
  • the uprights 34 pass through dedicated openings in the bottom 15 of the other body 4b '.
  • the cooperation between the stops leads to blocking the translation movement of the arc contact 5b relative to the fixed body 8, while the translational movement of the permanent contact 4b is continued, still under the action of the drive device.
  • the spring 16 is strongly compressed, because the arc contact 5b is temporarily blocked in translation relative to the permanent contact 4b.
  • the arc contact 5b thus remains a motionless moment in translation, without being driven by the permanent contact 4b and the assembly of the other body 4b ', which continues its course.
  • each finger 54 moves within its associated groove 56, thereby causing the rotation of the ring 52 in the second direction of rotation, that is to say, the one causing not the rod 17 of the arc contact 5b.
  • This rod 17 therefore remains rotationally fixed relative to the arc contact support 15.
  • the finger 54 is supported on the front end of the helical groove 56, or close to this end.
  • the ramps 40 of the fixed body 8 press radially inwards on the rollers 23, and cause the withdrawal of the latter in the support 20.
  • the angular offset between the ramps 40 and the uprights 34 prevents their entry into position. contact and allows the continuation of their relative displacement in the direction 11.
  • the high speed displacement of the arc contact 5b attenuates the electrical stresses. These are further weakened by the fact that during the relative displacement between the two contacts 4b, 5b, the finger 54 moves within the helical groove 56, thereby causing the ring 52 to rotate in the first direction rotation, that is to say the one driving the rod 17 of the arc contact 5b.
  • the release of energy from the spring and the rotation of the arcing contact are performed simultaneously, preferably during the separation of the arcing contacts, that is, they are initiated at the precise instant of the separation of the contacts of arcs or before this same instant.
  • the rotation is stopped slightly before the end of the energy release phase, and more precisely stopped when the finger 54 enters the straight extension of the groove 56.
  • the disconnector 1 is designed so that at this moment of end of rotation, the electric arc is already off.
  • the acceleration phase of the arc contact 5b is observed until the moment when this contact comes into abutment on the bottom 15 of the other body 4b 'of the moving assembly 6. This stop occurs before obtaining the complete opening.
  • the rollers 23 roll on the uprights 34, which keep them recessed in the base 20 of the arc contact 5b. This rolling, which participates in the centering of the arc contact 5b, is also continued until the complete opening of the disconnector.
  • the arc contact 5b After this opening phase, the arc contact 5b has been moved in rotation relative to its initially occupied position in the closed position.
  • the angular extent of this rotation is for example between 92 and 100 ° in the solution shown. Therefore, since the next closing operation causes no rotation of the arc contact 5b, the latter is then returned to the closed position in an angular position distinct from that adopted in the previous cycle.
  • the fixed body 8 comprises a series of two other uprights 60, also parallel to the axis 19 and arranged diametrically opposite on either side of the plane P2. These two uprights 60 are fixed on the fixed bottom 35. In closure and opening configurations, they are interposed radially between the dielectric element 13 of the other body 4b ', and the inner surface of the permanent contact 4b. It is noted that during the opening operation described above, these amounts 60 do not hinder the movement of the arc contact 5b, since the base 20 of the latter has at its periphery corresponding notches 62 for the passage of these amounts. One of these notches 62 is shown in figure 4c .
  • the bottom 15 of the other body 4b ' has dedicated openings for traversing the uprights 60 during its movement.
  • This bottom 15 is also equipped with a support element 66, located radially inwards relative to the uprights 60.
  • This element 66 is dedicated to supporting at least one travel stop 68, mounted radially movable on this element support between a withdrawal position and a projecting locking position. On the figure 5a it is the withdrawal position that is represented.
  • race stops 68 arranged diametrically opposite from each other, are provided. other plan P2, so as to cooperate in pairs with amounts 60.
  • the arc contact 5b is housed in the bottom of the other body 4b 'under the effect of the spring 16.
  • the contacts 5b, 4b then occupy a position called relative position determined, represented on the Figures 2a and 5a .
  • the two race stops 68 thus occupy their retracted position in which they are situated radially opposite two their associated uprights 60, in contact with them or leaving room for a small radial clearance.
  • the retracted position is maintained by two actuating members 70 cooperating respectively with the two race stops 68.
  • Each member 70 is in the form of a pin oriented along the main axis of the disconnector, and carried by the base 20 of the arcing contact 5b from which it extends in the direction of the fixed base 35. In this holding configuration of its associated abutment 68, each pin 70 passes through an axial opening of this abutment, which prevents the latter from move radially outwardly as it is forced by a spring 72 placed between the travel stopper 68 and the support 66.
  • each travel stopper 68 can therefore move relative to its associated amount 60, during the opening and closing operations.
  • each upright 60 has a radial opening 74 which the stop 76 located closest to the bottom 35 constitutes a complementary stop for retaining the travel stopper 68, in the circumstances which will be described below.
  • the disconnector 1 is designed so that in normal operation, during an opening operation, the relative displacement between the arcing contact 5b and the permanent contact 4b starts only when the race stops 68 are opposite. radially from the distal end of the uprights 60. This moment is represented on the figure 3a .
  • the pins 70 are gradually withdrawn from the openings of the stops 68 in which they are, when the contacts 5b, 4b occupy their determined relative position.
  • the pins 70 are therefore completely withdrawn from the openings, which causes the travel stops 68 to be displaced by the springs 72 radially outwardly. Nevertheless, this radial displacement is limited because the race stops 68 arrive quickly in contact with the inner surface of the uprights 60. This contact continues during the phase of energy release of the spring, during which the stops 68 slide on the amounts 60.
  • the design of the disconnector is such that, during normal operation, during the energy release phase, the two contacts 5b, 4b regain their determined relative position, before the race stops 68 do not reach the right of the openings 74. In this case, when passing through the openings 74, the stops 68 retained in the retracted position by the pins 70 can not relax radially through these openings 74, and the axial displacement of the movable assembly 6 can continue normally until the open position shown on the figure 5a .
  • the arc contact 5b can not be brought back into the bottom of the other body 4b 'during the phase supposed to release the energy previously accumulated in the spring.
  • the failure of the spring means that the contacts 5b, 4b do not regain their determined relative position.
  • the pins 70 no longer enter the dedicated openings made on the race stops 68. Therefore, when passing to the right of the openings 74, the stops 68 are forced by the springs 72 to move radially outwards, through these openings 74. The stops 68 then reach their projecting locking position, in which they come into contact with the edges 76 forming complementary stops.
  • This holding away from the permanent contact 4b constitutes a positive action design, making it possible to easily detect the failure of the spring 16, for example visually or with the aid of a simple position sensor (not shown) of the permanent contact 4b, relatively 8. Also, when the other body 4b 'has not reached the open position of the figures 5a and 5b at the end of the opening operation, this sensor can generate, via a disconnector control unit, a failure alert. An operator can then intervene on the disconnector 1 and make the appropriate changes, before a new closing operation is performed on this disconnector.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (14)

  1. Elektrisches Schaltgerät (1), insbesondere ein Trennschalter, der zwei elektrische Lichtbogenkontakte (5a, 5b) aufweist, die ausgelegt sind, um während eines Öffnungsvorgangs durch relatives Verschieben in Translation entlang einer Mittelachse (19) von diesen Lichtbogenkontakten von einer Schließstellung in eine Öffnungsstellung gebracht zu werden,
    wobei einer der zwei elektrischen Lichtbogenkontakte (5b) ein beweglicher Lichtbogenkontakt ist, der fester Bestandteil von einer elektrisch leitenden, beweglichen Anordnung (6) ist, die auch einen anderen Körper (4b') aufweist, der relativ zu dem beweglichen Lichtbogenkontakt (5b) in einer Bewegungsrichtung (11) dieser elektrisch leitenden Anordnung (6) gleitbeweglich befestigt ist, wobei diese Letztere ferner elastische Rückstellmittel (16) aufweist, die zwischen dem beweglichen Lichtbogenkontakt (5b) und dem anderen Körper (4b') angeordnet sind, wobei das Gerät derart ausgelegt ist, dass die elastischen Rückstellmittel (16) während eines Öffnungsvorgangs zunächst durch relatives Verschieben zwischen dem beweglichen Lichtbogenkontakt (5b) und dem anderen Körper (4b') Energie speichern und dann die gespeicherte Energie freisetzen können, um eine Beschleunigung des beweglichen Lichtbogenkontakts (5b) zu bewirken,
    und dadurch, dass in Schließstellung die elastischen Rückstellmittel (16) den beweglichen Lichtbogenkontakt (5b) und den anderen Körper (4b') in einer bestimmten Relativstellung positionieren, dadurch gekennzeichnet, dass das Gerät derart ausgelegt ist, dass nach dem Freisetzen von Energie durch die elastischen Rückstellmittel (16) während des Öffnungsvorgangs, wenn der bewegliche Lichtbogenkontakt (5b) und der andere Körper (4b') ihre bestimmte Relativstellung nicht wiederfinden, der andere Körper (4b') durch Anschlag daran gehindert wird, die Öffnungsstellung zu erreichen.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, dass der andere Körper (4b') ein Trägerelement (66) von mindestens einem Endanschlag (68) aufweist, der auf diesem Trägerelement zwischen einer zurückgezogenen Stellung und einer hervorstehenden Blockierungsstellung beweglich befestigt ist, wobei der bewegliche Lichtbogenkontakt (5b) mit mindestens einem Betätigungsorgan (70) ausgestattet ist, das, wenn der bewegliche Lichtbogenkontakt (5b) und der andere Körper (4b') ihre bestimmte Relativstellung einnehmen, mit dem Endanschlag (68) zusammenwirkt, indem es ihn in seiner zurückgezogenen Stellung hält, und dass ein fester Körper (8) des Gerätes mindestens einen zusätzlichen Anschlag (76) aufweist, der vorgesehen ist, um den Endanschlag (68) zurückzuhalten, wenn dieser seine hervorstehende Blockierungsstellung einnimmt, die in Abwesenheit des Zusammenwirkens mit dem Betätigungsorgan (70) erreicht wird, wobei der zusätzliche Anschlag (76) den Endanschlag (68) derart zurückhält, dass der andere Körper (4b') von seiner Öffnungsstellung beabstandet gehalten wird.
  3. Gerät nach Anspruch 2, dadurch gekennzeichnet, dass die elastischen Rückstellmittel (72) zwischen dem Trägerelement (66) und dem Endanschlag (68) derart angeordnet sind, um diesen in Richtung seiner hervorstehenden Blockierungsstellung zu treiben.
  4. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es einen Positionssensor des anderen Körpers (4b') relativ zu dem festen Körper (8) des Gerätes aufweist.
  5. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gerät ferner Mittel zum in Drehung Versetzen (54, 56) aufweist, die ermöglichen, mindestens nach dem Trennen der Lichtbogenkontakte während eines Öffnungsvorgangs eine Drehung der Lichtbogenkontakte (5a, 5b) zueinander entlang der Mittelachse (19) zu bewirken.
  6. Gerät nach Anspruch 5, dadurch gekennzeichnet, dass die Mittel zum in Drehung Versetzen (54, 56) ausgelegt sind, um die relative Drehung der zwei Lichtbogenkontakte (5a, 5b) während des Trennens der Lichtbogenkontakte einzuleiten.
  7. Gerät nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Mittel zum in Drehung Versetzen (54, 56) derart ausgelegt sind, dass sich die relative Winkelposition zwischen den zwei elektrischen Lichtbogenkontakten (5a, 5b) von jener, die in einer Schließstellung der Lichtbogenkontakte eingenommen wird, und von jener, die in der Schließstellung des direkt nachfolgenden Zyklus eingenommen wird, unterscheidet.
  8. Gerät nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass die Mittel zum in Drehung Versetzen (54, 56) ausgelegt sind, um eine relative Drehung der zwei Lichtbogenkontakte (5a, 5b) nur während der Phase des Freisetzens der Energie der elastischen Rückstellmittel (16) anzuwenden.
  9. Gerät nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Mittel zum in Drehung Versetzen ein Fingersystem (54) aufweisen, das in einer schraubenförmigen Rille (56) angeordnet ist, wobei die relative Drehung der zwei Lichtbogenkontakte (5a, 5b) automatisch durch Verschieben des Fingers (54) in der schraubenförmigen Rille (56) während des Gleitens zwischen dem anderen Körper (4b') und dem beweglichen Lichtbogenkontakt (5b) während der Phase des Freisetzens der Energie der elastischen Rückstellmittel (16) erfolgt.
  10. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der andere Körper (4b') dazu bestimmt ist, mit einem Befestigungspunkt (22) einer Antriebsvorrichtung (30) der elektrisch leitenden, beweglichen Anordnung (6) verbunden zu werden.
  11. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der andere Körper (4b') einen elektrischen Dauerkontakt (4b) aufweist.
  12. Gerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es Anschlagmittel (23, 28) aufweist, die ermöglichen, während eines Öffnungsvorgangs die Translationsbewegung des beweglichen Lichtbogenkontakts (5b) in Bezug auf einen festen Körper (8) des Gerätes zu blockieren, und dadurch, dass der andere Körper (4b') mit Verriegelungsmitteln (40) ausgestattet ist, die ausgelegt sind, um die Anschlagmittel freizugeben, nachdem dieser andere Körper relativ zu dem beweglichen Lichtbogenkontakt (5b) um einen vorbestimmten Abstand verschoben worden ist.
  13. Gerät nach Anspruch 12, dadurch gekennzeichnet, dass die Anschlagmittel mindestens einen ersten beweglichen Anschlag (23), der auf dem beweglichen Lichtbogenkontakt (5b) befestigt ist, und mindestens einen zweiten Anschlag (38) aufweisen, der auf dem festen Körper (8) des Gerätes befestigt ist, und dadurch, dass die Verriegelungsmittel (40) die Form von mindestens einer Rampe annehmen, die geeignet ist, den ersten beweglichen Anschlag (23) relativ zu dem Lichtbogenkontakt (5b) durch Kontakt zu verschieben.
  14. Verfahren zum Umsetzen eines Öffnungsvorgangs mit Hilfe eines Gerätes (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass dieser Vorgang derart durchgeführt wird, dass infolge des Freisetzens von Energie durch die elastischen Rückstellmittel (16), wenn der bewegliche Lichtbogenkontakt (5b) und der andere Körper (4b') ihre bestimmte Relativstellung, die in der Öffnungsstellung eingenommen wird, nicht wiederfinden, der andere Körper (4b') durch Anschlag daran gehindert wird, die Öffnungsstellung zu erreichen.
EP15700548.9A 2014-01-14 2015-01-12 Trennschalter zur erkennung des defekts einer beschleunigungsfeder eines lichtbogenkontakts Active EP3095125B1 (de)

Applications Claiming Priority (2)

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FR1450261A FR3016470B1 (fr) 2014-01-14 2014-01-14 Sectionneur a detection de defaillance d'un ressort d'acceleration d'un contact d'arc
PCT/EP2015/050415 WO2015107023A1 (fr) 2014-01-14 2015-01-12 Sectionneur a detection de defaillance d'un ressort d'acceleration d'un contact d'arc

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EP3142134A1 (de) * 2015-09-14 2017-03-15 Siemens Aktiengesellschaft Assistenzsystem zur detektion einer störung eines trennschalters, das an mittel- und hochspannungen angepasst ist
WO2018036904A1 (de) * 2016-08-26 2018-03-01 Abb Schweiz Ag Schalter und verfahren zum trennen eines schalters
US11069494B2 (en) * 2017-11-17 2021-07-20 Mitsubishi Electric Corporation Switchgear
EP3776616B1 (de) 2018-03-28 2023-02-15 Hitachi Energy Switzerland AG Federbelastetes hilfskontaktsystem für busübertragungsschaltung in einem drehtrennschalter
EP3748658B1 (de) * 2019-06-04 2022-03-23 General Electric Technology GmbH Kontaktanordnung für einschaltwiderstände

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FR2547107B1 (fr) 1983-06-06 1986-05-09 Merlin Gerin Sectionneur d'isolement blinde
DE3832171A1 (de) * 1988-07-01 1990-01-04 Licentia Gmbh Einrichtung zur raschen ein- und ausschaltung von kleinen stroemen fuer trennschalter von v.i.s.
KR101786518B1 (ko) * 2011-04-27 2017-10-18 엘에스산전 주식회사 가스 절연 차단기용 소호부
CN102306559B (zh) * 2011-09-02 2013-10-09 平高集团有限公司 一种动静触头连接组件及其高压隔离接地开关
FR2984590B1 (fr) * 2011-12-14 2014-07-04 Alstom Technology Ltd Ensemble conducteur mobile pour sectionneur, comprenant un ressort permettant d'accelerer la separation des contacts d'arc
FR3001081B1 (fr) * 2013-01-14 2016-05-13 Alstom Technology Ltd Sectionneur a contact d'arc rotatif

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FR3016470B1 (fr) 2016-02-26
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WO2015107023A1 (fr) 2015-07-23

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