EP1267374B1 - Elektrisches Schaltgerät mit beweglicher Kontaktbrücke - Google Patents

Elektrisches Schaltgerät mit beweglicher Kontaktbrücke Download PDF

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Publication number
EP1267374B1
EP1267374B1 EP20020354070 EP02354070A EP1267374B1 EP 1267374 B1 EP1267374 B1 EP 1267374B1 EP 20020354070 EP20020354070 EP 20020354070 EP 02354070 A EP02354070 A EP 02354070A EP 1267374 B1 EP1267374 B1 EP 1267374B1
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EP
European Patent Office
Prior art keywords
contact
rotation
contact means
bridge
movable
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 - Fee Related
Application number
EP20020354070
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English (en)
French (fr)
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EP1267374A1 (de
Inventor
Francis Schneider Electric Ind. S.A. Chevalier
Sandrine Schneider Electric Ind. S.A. Masson
Denis Schneider Electric Ind. S.A. Milan
Francois Schneider Electric Ind. S.A. Trichon
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP1267374A1 publication Critical patent/EP1267374A1/de
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Classifications

    • 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
    • H01H33/121—Load break switches
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2016—Bridging contacts in which the two contact pairs commutate at substantially different moments
    • 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
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch

Definitions

  • the invention relates to an electrical switchgear high-voltage switchgear such as a disconnector switch, a disconnector, an earthing switch or a switch, with or without breaking capacity, with or without switching power. closing.
  • a power switch for high-voltage cut-off in the air having a first connection pad connected to a fixed contact member, a second connection pad connected to a movable contact pad pivoting about a geometric axis fixed, and a drive mechanism of the blade.
  • the free end of the blade forms a permanent contact, and is provided with an arc contact formed by a rod guided in translation in a direction orthoradial with respect to the axis of rotation of the blade, and recalled by a spring return to a rest position partially retracted.
  • connection contact member comprises a permanent contact cooperating with the free end of the blade and a complementary arc contact formed by a blowing piston, movable inside a blowing chamber, biased towards a position resting by a blow spring, and provided with a clamp which cooperates with the rod carried by the blade.
  • a high voltage load break disconnector having a movable contact bridge connecting two connecting contact members.
  • a drive mechanism ensures the translation of the movable contact between a closed position and a cutting position, along a translation axis perpendicular to the contact bridge. In the sectioning position, a double break is performed and the contact bridge remains at a floating potential.
  • the isolation distance to be respected between the contact bridge and each of the two connection contacts is smaller than the isolation distance that would be required between two conductors, each at the potential of one of the connection contacts. The size is therefore reduced compared to an apparatus with movable movable contact of the type previously described.
  • the pure translation movement of the contact bridge has the consequence that it separates simultaneously from the two connection contacts, generating two electric arcs in series. It is therefore necessary to provide two arcing contact devices allowing the simultaneous extinction of the two arcs.
  • Arc contacts being moving parts, the reliability of the device is decreased and the price increased.
  • the moving mass at the time the cut takes place i.e. at the moment of separation of the arcing contacts, comprises the entire mass of the contact bridge and the arcing contacts, which imposes a drive mechanism of power and high energy.
  • a high-voltage switch-off disconnector comprising a movable contact bridge connecting two clamp-shaped connection pads.
  • One of the clamps is associated with an arc extinguishing chamber for loading openings.
  • the other clamp is dimensioned to ensure a great power of closure.
  • a drive mechanism operates the contact bridge such that at the opening, the bridge separates successively from the clamp associated with the extinguishing chamber and clamp with high closing power while closing, the bridge is first engaged in the clamp associated with the extinguishing chamber and then in the clamp with high closing power.
  • the contact bridge is a lever articulated by a median pivot to a driving rod movable in translation.
  • the sequencing is obtained either by ensuring different friction between the clamps and the bridge, either by providing different masses for the two lever arms of the bridge, or by providing lever arms of different lengths, or by combining the measures preceding.
  • the mechanism does not allow precise control of the position of the contact bridge during the maneuver.
  • switch disconnector baase voltage comprising a pair of movable knives cooperating at one end with a bar of a busbar and the other end with a fixed contact connected to an output conductor, an arc extinguishing chamber being arranged facing the fixed contact.
  • the pair of movable knives is articulated around a first axis connected by a first set of connecting rods to an operating shaft, a second set of connecting rods being articulated on the shaft and at the end of the knives bar side.
  • the first axis is subject to move parallel to itself along a path comprising an arc portion followed by a substantially rectilinear portion.
  • a first rotation of the shaft produced by means of the rods a displacement of the axis according to the arc portion of the circle, causing the separation of the pair of movable knives and the fixed contact.
  • a second rotation of the shaft consecutive to the first produces a displacement of the axis along the rectilinear portion causing a separation of the pair of knives and the bar.
  • the pair of knives substantially follows a rotational path about the axis of rotation of the operating shaft, while only a displacement of the portion in contact with the bar is necessary. This does not allow optimization of the maneuvering energy.
  • the pair of knives remains between the bar and the fixed contact.
  • the shortest current path passing through the air and in the pair of knives between the bar and the fixed contact hardly increases between the open position obtained at the end of the first phase and the so-called disconnection position. obtained at the end of the second phase.
  • the second phase of the movement does not improve the sectioning between the bar and the fixed contact.
  • the only effect of the second phase is to isolate the pair of knives.
  • Such a solution which may have an interest in low voltage, can not be transposed to high voltage.
  • the invention therefore aims to overcome the drawbacks of the state of the art, so as to provide a low voltage electrical switchgear switchgear and requiring only a low energy mechanism for opening and closing maneuvering . More specifically, it aims to improve the performance and simplify an electrical switchgear high-voltage switchgear.
  • the contact bridge makes a movement which is essentially a rotation around the second connecting contact member, so that the energy necessary to bring, from a closed rest position , the first movable contact at a given speed at the time of separation between the first movable contact and the first connection contact member is less than the energy that would be necessary if it were necessary to simultaneously move the second movable contact.
  • the contact bridge Due to the reversal of the direction of rotation in the second phase of the opening movement, the contact bridge separates from the second connecting contact member without approaching the first one so that overall, the length of the current path passing from one connecting contact member to the other via the air and the contact bridge increases continuously.
  • the contact bridge when it reaches the separation position, is separated from the two connecting contact elements and is at a floating potential.
  • the breakdown voltage i.e., the voltage at which an arc will arise between the contacts, is approximately twice the the disruptive voltage corresponding to a movable contact member which is still electrically connected to the second connection contact member. Indeed, there are two arcs that must burst simultaneously to establish a current, between the contact bridge and each of the contact elements of connection. It is therefore possible to obtain interesting performances in a reduced volume.
  • the contact bridge is in a double-disconnection position at the end of the second phase, approximately equidistant from the first and second connecting contact members.
  • the sectioning is obtained between the bridge and the first connecting contact member on the one hand, and between the contact bridge and the second connecting contact member on the other hand.
  • the distance required between the contact bridge and each connection contact member is therefore smaller than that which would be necessary between a fixed connection contact member and a movable contact pivoting about a fixed axis and remaining at the potential of the second member. connection contact.
  • the contact bridge in the disconnected position may be arranged in the direct vicinity of the wall, parallel to it for example, whereas in the case of a mobile contact remaining at the potential of one of the phases, it is necessary to respect between the movable contact in the disconnected position and the wall of the enclosure a phase-neutral safety distance. The same applies if the equipment has to be placed in the air near other equipment. Overall, therefore, a more compact apparatus is obtained.
  • the guiding device comprises a guide rod articulated on the second pivot and on a pivot integral with the frame. Guiding is then extremely simple to perform, and inexpensive. It makes it possible to produce the kinematics required for the two-phase movement as well as that required for the third phase.
  • the guiding device comprises a guiding slide secured to the frame and in which the second pivot slides.
  • the slide has a first ramp substantially orthoradial with respect to an imaginary axis parallel to the axis of rotation of the crank and passing close to the second connecting contact member, and a second ramp substantially radial with respect to the axis of rotation from the crank.
  • the guidance is then more complex from a constructive point of view, but it leaves an additional degree of freedom to the designer to establish an ideal curve of displacement of the contact bridge.
  • other guide devices are possible and in particular guiding devices cooperating with another material point of the contact bridge or one of the connecting rods.
  • the instantaneous center of rotation is not necessarily fixed in each of the phases.
  • the instantaneous center of rotation is close to the second movable contact member during the first phase. This allows a minimum movement between the second movable contact member and the second connection contact member during this phase, since it seeks to maintain contact between these two bodies.
  • the instantaneous center of rotation is close to the first movable contact member during the second phase. This makes it possible to quickly separate the second movable contact member from the second connection contact member, and thus rapidly increase the breakdown voltage between the contact bridge and the connecting contact members.
  • the separation movement comprises a third phase succeeding the second phase and in which the contact bridge pivots around the instantaneous center of rotation in the second direction of rotation, bringing the contact bridge into contact with an earthing contact or grounding member and bringing the first movable contact member into contact with the first contact member connection.
  • the first connection contact member is grounded.
  • the first connection contact member comprises an arc contact cooperating with an arc contact of the first movable contact member.
  • the arcing contacts may be of the blow piston and rod type, described in the US document, the description of which is incorporated herein by reference. It should be emphasized that the invention requires only one pair of arcing contact, compared to two for conventional contact bridge apparatus.
  • At least one of the connecting contact members comprises a clamp cooperating in the closed position with a knife of the movable contact member with which it is in contact.
  • the interest of this type of contact is to admit a certain degree of movement between the clamp and the knife before separation, and to admit in particular a certain degree of pivoting between the knife and the clamp.
  • the energy necessary for the separation between clamp and knife is not negligible, and the invention offers on this point the decisive advantage of a kinematics in which the first and second contact members do not separate simultaneously. .
  • the invention relates to high-voltage switchgear, in particular switchgear devices in air or in a gas with high dielectric strength, but also switchgear in oil.
  • high voltage is understood here, according to the international normative vocabulary, all the voltages higher than 1000V, which include both the medium voltage field and the very high voltage field.
  • a medium voltage overhead switch-disconnector 10 according to a first embodiment of the invention comprises a first connection contact member 12, a second connection contact member 14, and a movable contact bridge 16, driven by a mechanism Training 18.
  • the first connecting contact member 12 is fixed to an insulator 20 ensuring its holding relative to a sheet of a support frame 22, and is connected to an overhead conductor, in this case to a bar 24 of a set of power bars.
  • the first connecting contact member 12 is composed of a clip 26 and an arc contact formed by a piston 28 of the well-known type described for example in the document US 4,263,487 .
  • the second connecting contact member 14 is a clamp 29, visible in detail on the figure 4 , fixed at one end of a penetration 30 penetrating into the tank of an oil-insulated medium voltage electrical transformer, through the plate 22.
  • the movable contact bridge 16 is constituted by a rigid metal blade 32 forming a first movable contact member 34 on the side of one of its ends, and a second movable contact member 36 on the side of its opposite end.
  • the first movable contact member 34 is composed of a knife 38 and a spark arrester rod 40, visible on the figures 3 and 4 .
  • the second member 36 is a simple knife.
  • the body 32 of the rigid blade provides the electrical connection between the two movable contact members 34, 36 which are always at the same electrical potential.
  • the drive mechanism comprises a motor shaft 42 rotated by a motor mechanism not shown and driving a transmission shaft 44, also called drive shaft, via a driving crank 46 keyed on the motor shaft 42, a driven crank 48 keyed on the drive shaft 44 and a transmission rod 49 articulated on the two cranks 46, 48.
  • the drive shaft 42 and the drive shaft 44 are arranged perpendicularly in the plane of the figures and journalled on bearings supported by the frame 22.
  • the shaft 44 carries a double crank 50.
  • the crank 50 supports a first pivot 52 allowing the articulation of a first intermediate rod 54, and a second pivot 56 allowing the articulation of a second intermediate link 58.
  • the first link 54 is also articulated on the contact bridge 16, around a first pivot 60 of the bridge 16, located at an intermediate point between the two movable contact members 34, 36, near the first movable contact member 34.
  • the second link is also articulated on the contact bridge, about a second pivot 62 of the bridge 16, located at a point intermediate the first pivot 60 and the second movable contact member 36, close to the latter.
  • the second pivot 62 is guided in a guide slide 64, visible particularly on the figure 4 , which comprises a first ramp 66 inclined in a direction substantially orthoradial with respect to an imaginary axis 68 which would be parallel to the axis of rotation 70 of the drive shaft 44 and pass in the immediate vicinity of the second clamp 36, this first ramp 66 extending by a second ramp 72 substantially radial to the axis of rotation of the drive shaft 44.
  • the geometric axes of rotation of the pivots 52, 56, 60, 62 are all parallel to the geometric axis of rotation of the drive shaft 44, so that the movement of the bridge contact 16 is plane, that is to say that all its material points move parallel to the same reference plane, in this case the plane of the figures, which is perpendicular to the geometric axis of rotation of the
  • the contact bridge 16 having a plane movement, it is known that it is possible at any moment to determine an instantaneous center of rotation of the contact bridge 16, which is the single material point connected to the contact bridge 16 and having a speed zero at the moment considered in relation to a fixed reference system. It must be emphasized that the instantaneous center of rotation is likely to be different from one instant to another. Reference will also be made in the following to an instantaneous axis of rotation which will be the geometric axis of rotation perpendicular to the reference plane of the plane movement and passing at the instant considered by the center of rotation.
  • the angle of the first connecting rod 54 is the angle ⁇ 1 open between a geometrical straight line passing through the two pivots 52, 60 of the first connecting rod 54 on the one hand and a straight line passing through the pivot 52 of the first connecting rod on the crank and the axis of rotation of the shaft 44 on the other hand, angle whose apex is located on the pivot 52 of rotation of the first rod relative to the crank.
  • the angle of the second connecting rod is the angle ⁇ 2 open between a geometrical line passing through the two pivots 56, 62 of the second connecting rod 58 on the one hand and a straight line passing through the pivot 56 of the second connecting rod 50 on the crank and the axis of rotation of the shaft 44 on the other hand, whose apex is located on the pivot 56 of rotation of the second rod 58 relative to the crank 50.
  • the two knives 36, 38 of the contact bridge 16 are inserted into the clamps of the connecting contact members, so that the current flows between the bars and the bushing.
  • the spark rod 40 is inserted into the piston 28.
  • the angle ⁇ 1 of the first link 54 is close to a right angle, while the angle ⁇ 2 of the second link 58 is an acute angle less than 30 °.
  • a first so-called cut-off phase the apparatus moves from the closed position of the figure 1 at the transitional position of cutoff the figure 3 , passing through the transitional position before cutting off the figure 2 , Gradually opening angle ⁇ 1 of the first link and the angle ⁇ 2 of the second link.
  • the angle ⁇ 1 of the first connecting rod remains close to 90 °, so that the rotation of the crank 50 results in a significant displacement of the pivot 60, while the angle ⁇ 2 of the second rod 58 remains weak, which results in a small displacement of the pivot 62 along the first ramp 66 of the slide 64.
  • the plane movement of the contact bridge 16 is decomposed into a rotation in the counterclockwise direction in the figures, around an instantaneous center of rotation located near the second clamp 29 and the second knife 36, and a displacement of the instantaneous axis of rotation such as this remains near the second clamp 29 and the second knife 36.
  • the second knife 36 remains inserted in the second clamp 29. More specifically, between the position of the figure 1 and that of the figure 2 , the displacement of the bridge 16 gives rise to the separation between the first knife 38 and the first clamp 26. However, the spark arrester 40 remains inserted into the piston 28 and drives the latter.
  • the spark arrester 40 separates from the piston 28 which returns to its rest position abruptly under the bias of a return spring.
  • the separation of the arcing contacts 28, 40 gives rise to an electric arc which is blown by the retracting piston.
  • the duration of the trip between the position of the figure 2 and that of the figure 3 is preferably greater than one period of the alternating current, ie 20ms, so that at least two zero crossings of the current are ensured before the apparatus reaches the position of the figure 3 .
  • the electric arc goes out while the distance between the first contact members 12, 34 increases rapidly and that the residual gases of the cut are blown by the piston 28. This rapid separation provides sufficient dielectric strength to prevent recloshing when the transient recovery voltage increases between the first contact members.
  • the current is definitely interrupted.
  • the double disconnection position is reached when the contact bridge 16 is parallel to its closed position, substantially equidistant from the two connecting contact members 12, 14, at a distance sufficient to ensure the separation between the contact bridge 16 - which is at a floating potential - and each of the two connecting contact members 12, 14.
  • Closing occurs with reverse sequencing, caused by rotation of the drive shaft 44 clockwise.
  • the second knife 36 intermesh in the second clamp 29, then the first knife 38 and the spark screen 40 respectively in the first clamp 26 and in the piston 28.
  • the slide 64 makes it possible to reduce the number of degrees of freedom of the transmission constituted by the drive mechanism 18, so as to impose on the contact bridge 16 a complex movement comprising in the first phase a rotation in the direction counterclockwise and in the second phase a clockwise rotation.
  • a second embodiment is shown on the Figures 4 to 7 .
  • the electrical apparatus considered is an earthing switch 100, comprising a first connection clamp 102, a second connection clamp 104, a grounding clamp 106, and a contact bridge 110 driven by a drive mechanism 112 mounted on a support frame 113.
  • the contact bridge 110 has a blade shape and constitutes a first movable knife contact 114 at one of its ends and a second movable double knife contact 116 at the opposite end.
  • the clamps 104, 106 are fixed relative to the frame 113.
  • the drive mechanism 112 includes a drive shaft 118 driven by a motor mechanism not shown.
  • the shaft 118 is arranged perpendicular to the plane of the figures and pivots about an axis of rotation 122, guided by bearings supported relative to the frame 113.
  • the shaft carries a double crank 124.
  • the crank supports a first pivot 126 allowing the articulation of a first intermediate link 128, and a second pivot 130 allowing the articulation of a second intermediate link 132.
  • the first link 128 is also articulated on the contact bridge 110, around a first pivot 134 of the contact bridge, located near the first movable contact 114.
  • the second link 132 is also articulated on the contact bridge 110, near the second movable contact member 116, around a second pivot 136 of the bridge.
  • a guide rod 140 is articulated between the second pivot 136 of the bridge and a pivot 142 of rotation about a fixed geometric axis relative to the frame 113, disposed in the immediate vicinity of the first contact clamp 102.
  • the geometric axes of rotation of the pivots 126, 130, 134, 136, 142 are all parallel to the geometrical axis of rotation 122 of the drive shaft 118, so that the movement of the contact bridge 110 is plane, that is to say parallel to the plane of the figures.
  • the movement of the mechanism is broken down into three successive phases, without stopping in the intermediate positions represented on the figures 6 , 7 which are only transient.
  • the first phase is an opening phase, which allows to pass the closed position of the figure 5 at the open transitional position of the figure 6 .
  • the crank 124 pivots counterclockwise and drives the two intermediate rods 128, 132.
  • the second pivot 136 which is constrained by the guide rod 140 to follow a circular path around the fixed geometric axis of the pivot 142, moves only very little, so that the contact bridge 110 rotates around the instantaneous center of rotation which, during the first phase, remains located at the second clamp 104 and the second knife 116, allowing the separation between the first clamp 102 and the first knife 114 while imposing maintaining the second knife 116 in the second clamp 104.
  • the limitation of movement imposed by the guide rod 140 to the second pivot 136 of the contact bridge is close to that imposed by the first ramp 66 of the slide 70 of the first embodiment of the invention.
  • the second phase is a double sectioning phase, in which the limitation of movement imposed by the guide rod 140 to the second pivot 136 of the contact bridge is similar to that imposed by the second ramp 72 of the slideway 64 of the first embodiment. embodiment of the invention.
  • the contact bridge 110 undergoes a compound motion having a clockwise rotation about an instantaneous center of rotation located near the first pivot of the bridge.
  • the bridge 110 is in a position parallel to its closed position, approximately equidistant from the two connection clamps 102, 104, at a distance enabling double isolation, ie say a sectioning with respect to each of the connection clamps 102, 104.
  • the third phase of the movement is the actual grounding phase, in which the bridge 110 continues to rotate clockwise until the first movable contact 114 again enters the first clamp 102 while the second movable contact 116 enters the earthing clamp 106, causing the earthing or grounding of the conductor connected to the first connection clamp 102.
  • the instantaneous center of rotation is located more or less between the first and second pivots 134, 136 of the contact bridge.
  • the position of the bridge on the figure 8 is approximately 60 to 90 ° from its closed position.
  • the closure proceeds in an inverse sequence, caused by the rotation of the drive shaft 118 in the clockwise direction and passing the position of the figure 8 , at the position of the figure 7 , then to that of the figure 6 to the position of the figure 5 .
  • the slide can be replaced by a guide rod as described in the second embodiment.
  • the connecting rod may be replaced by a slideway which comprises two ramps identical to that of the first embodiment, and a third ramp corresponding to the trajectory taken by the second pivot in the third phase of the movement according to the second embodiment. embodiment.
  • the pliers contacts may be replaced by any other type of contact allowing a pivoting movement between the second movable contact member and the second connecting contact member.
  • the connecting rods of the mechanism may advantageously be doubled so as to provide better guidance. It will be particularly advantageous to double the second rod 58, to ensure better guidance of the second pivot of the contact bridge. In practice, there will be two identical and parallel connecting rods, on either side of the contact bridge.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (10)

  1. Elektrisches Hochspannungs-Schaltgerät (10) umfassend
    - ein Traggerüst (22, 113),
    - ein erstes Anschluss-Kontaktglied (12, 102),
    - ein zweites Anschluss-Kontaktglied (14, 104),
    - eine Kontaktbrücke (16, 110) mit einem ersten beweglichen Kontaktglied (34, 114) und einem zweiten beweglichen Kontaktglied (36, 116), welche elektrisch miteinander verbunden sind, wobei die Kontaktbrücke (16, 110) zwischen einer Einschaltstellung, in der das erste bewegliche Kontaktglied (34, 114) mit dem ersten Anschluss-Kontaktglied (12, 102) und das zweite bewegliche Kontaktglied (36, 116) mit dem zweiten Anschluss-Kontaktglied (14, 104) in Kontakt stehen, sowie einer Doppel-Trennstellung bewegt werden kann, in der die Kontaktbrücke (16, 110) in annähernd dem gleichen Abstand zum ersten Anschluss-Kontaktglied (12, 102) und zum zweiten Anschluss-Kontaktglied (14, 104) steht,
    - einen Betätigungsmechanismus (18, 112) zur Betätigung der Kontaktbrücke (16, 110) gemäß einer Trennbewegung in einer relativ zum Traggerüst verlaufenden Ebene von der Einschaltstellung in die Doppel-Trennstellung sowie gemäß einer Einschaltbewegung von der Doppel-Trennstellung in die Einschaltstellung, welche Bewegung der Ausschaltbewegung von der Einschaltstellung in die Doppel-Trennstellung entgegengerichtet ist, wobei der Betätigungsmechanismus so ausgebildet ist, dass die in einer Ebene erfolgende Trennbewegung eine erste Phase, in der die Kontaktbrücke (16, 110) in einem ersten Drehsinn um den Momentanpol verschwenkt und dadurch die Trennung des ersten beweglichen Kontaktglieds (34, 114) vom ersten Anschluss-Kontaktglied (12, 102) gewährleistet, sowie eine zweite Phase umfasst, in der die Kontaktbrücke (16, 110) in einem, dem ersten Drehsinn entgegengerichteten zweiten Drehsinn um den Momentanpol verschwenkt und dadurch die Trennung des zweiten beweglichen Kontaktglieds (36, 116) vom zweiten Anschluss-Kontaktglied (14, 104) gewährleistet,
    dadurch gekennzeichnet, dass der Betätigungsmechanismus so ausgebildet ist, dass die in einer Ebene erfolgende Einschaltbewegung in umgekehrter Abfolge eine erste Einschaltphase, in der die Kontaktbrücke (16, 110) im ersten Drehsinn um dem Momentanpol verschwenkt und dadurch den Kontakt zwischen dem zweiten beweglichen Kontaktglied (36, 116) und dem zweiten Anschluss-Kontaktglied (14, 104) gewährleistet, sowie eine anschließende zweite Einschaltphase umfasst, in der die Kontaktbrücke (I 6, 110) im zweiten Drehsinn um dem Momentanpol verschwenkt und dadurch den Kontakt zwischen dem ersten beweglichen Kontaktglied (34, 114) und dem ersten Anschluss-Kontaktglied (12, 102) gewährleistet.
  2. Elektrisches Schaltgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Betätigungsmechanismus (18, 112)
    - mindestens einen Kurbelarm (50, 124), der um eine in Bezug zum Traggerüst ortsfeste geometrische Achse verschwenkt,
    - mindestens eine erste Stange (54, 128), die den Kurbelarm mit einem ersten Drehzapfen (60, 134) der Kontaktbrücke verbindet, welcher erste Drehzapfen zwischen dem ersten beweglichen Kontaktglied (34, 114) und dem zweiten beweglichen Kontaktglied (36, 116) angeordnet ist,
    - mindestens eine zweite Stange (58, 132), die den Kurbelarm mit einem zweiten Drehzapfen (62, 136) der Kontaktbrücke verbindet, welcher zweite Drehzapfen zwischen dem ersten Drehzapfen (60, 134) und dem zweiten beweglichen Kontaktglied (36, 116) angeordnet ist,
    - sowie eine Führungsvorrichtung (64, 140) zur Führung der Kontaktbrücke umfasst.
  3. Elektrisches Schaltgerät nach Anspruch 2, dadurch gekennzeichnet, dass die Führungsvorrichtung eine an den zweiten Drehzapfen (136) sowie einen fest mit dem Traggerüst verbundenen Drehzapfen (142) angelenkte Führungsstange (140) umfasst.
  4. Elektrisches Schaltgerät nach Anspruch 2, dadurch gekennzeichnet, dass die Führungsvorrichtung eine fest mit dem Traggerüst verbundene Führungskulisse (64) umfasst, in der der zweite Drehzapfen entlang gleitet (62).
  5. Elektrisches Schaltgerät nach Anspruch 4, dadurch gekennzeichnet, dass die Kulisse (64) eine erste Schräge (66), welche annähernd orthoradial zu einer, parallel zur Rotationsachse (70) des Kurbelarms verlaufenden imaginären Achse sowie in der Nähe des zweiten Anschluss-Kontaktglieds (14) verläuft, sowie eine zweite Schräge (72) aufweist, die annähernd radial zur Rotationsachse des Kurbelarms (70) verläuft.
  6. Elektrisches Schaltgerät nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Momentanpol während der ersten Phase in der Nähe des zweiten beweglichen Kontaktglieds (36, 116) liegt.
  7. Elektrisches Schaltgerät nach irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Momentanpol während der zweiten Phase in der Nähe des ersten beweglichen Kontaktglieds (34, 114) liegt.
  8. Elektrisches Schaltgerät nach irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Trennbewegung eine, auf die zweite Phase folgende dritte Phase umfasst, in deren Verlauf die Kontaktbrücke (110) im zweiten Drehsinn um den Momentanpol verschwenkt und dabei die Kontaktbrücke (110) mit einem Erdungs- oder Masseverbindungs-Kontaktglied (106) sowie das erste bewegliche Kontaktglied (114) mit dem ersten Anschluss-Kontaktglied (102) in Kontakt bringt.
  9. Elektrisches Schaltgerät nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das erste Anschluss-Kontaktglied einen Lichtbogenkontakt (28) umfasst, der mit einem Lichtbogenkontakt (40) des ersten beweglichen Kontaktglieds zusammenwirkt.
  10. Elektrisches Schaltgerät nach irgendeinem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass mindestens eines der Anschluss-Kontaktglieder (12, 14, 102, 104) eine Kontaktzange umfasst, die in der Einschaltstellung mit einem Kontaktmesser (38, 36, 114, 116) des zugehörigen beweglichen Kontaktglieds zusammenwirkt.
EP20020354070 2001-06-11 2002-04-26 Elektrisches Schaltgerät mit beweglicher Kontaktbrücke Expired - Fee Related EP1267374B1 (de)

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FR0107564 2001-06-11
FR0107564 2001-06-11

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CN108493033A (zh) * 2018-05-16 2018-09-04 许昌亿源电气有限公司 一种户外高压隔离开关
DE102018222848A1 (de) * 2018-12-21 2020-06-25 Siemens Aktiengesellschaft Erdungsschalter für eine Mittel- und/oder Hochspannungs-Schaltungseinrichtung und entsprechende Schaltungseinrichtung
CN112176895B (zh) * 2020-10-19 2021-11-23 江苏盛达福交通工程有限公司 道路交通标线投影装置

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Publication number Priority date Publication date Assignee Title
DE1465937A1 (de) * 1964-08-26 1969-05-29 Licentia Gmbh Trennschalter bzw. Lasttrennschalter fuer Hochspannung
DE1690506A1 (de) * 1967-09-09 1971-06-03 Wickmann Werke Ag Hochspannungs-Lasttrennschalter
DE2434438A1 (de) * 1974-07-17 1976-01-29 Concordia Sprecher Schalt Lasttrennschalter
US4263487A (en) * 1980-03-31 1981-04-21 Electrical Equipment, Inc. Air switch
FR2511807A1 (fr) * 1981-08-20 1983-02-25 Alsthom Atlantique Sectionneur interrupteur multipolaire a embrochage et debrochage sur un jeu de barres

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EP1267374A1 (de) 2002-12-18
DE60238096D1 (de) 2010-12-09
CN1391246A (zh) 2003-01-15
CN1249755C (zh) 2006-04-05
NO20022763L (no) 2002-12-12
NO322270B1 (no) 2006-09-04
NO20022763D0 (no) 2002-06-10

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