Classifications

• • 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
  • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
  • H01H31/36—Contact moved by pantograph

Definitions

• the invention relates to an outdoor switching device with an outdoor switching path, with a first contact piece, with a second contact piece, wherein the first contact piece by means of a drive arrangement relative to the second contact piece is movable and arranged on a pivot arm of the Antriebsanord- tion.
• Such outdoor switching device is known for example from the translation of European Patent DE 60 2005 000 144 T2.
• the local open-air switching device is referred to as a pivotable earthing switch, which has a first contact piece and a second contact piece.
• the first con ⁇ tact piece is pivotable about a pivot point, so that it is movable relative to the second contact piece.
• it is possible to form a Freiluftschalt- track between the two contact pieces.
• Swivel arm is mounted on a screw jack.
• An outdoor switching device is a switching device which uses atmospheric air to Dar ⁇ position of an outdoor switching path between relative to one other movable contacts. Atmospheric air has an average By ⁇ impact resistance, so that lead to achieve a secure insulation of different electric potentials ⁇ the contact pieces, these corresponding to each other,
• the open-air switching path has at mutually contacting con ⁇ tact breakfast on an impedance which should tend towards zero. With contact pieces remote from one another, the free air switching path has an impedance which should approach infinite th ⁇ .
• the fulcrum can be moved to contact the contact pieces to egg ⁇ nem preferably stationary contact piece.
• the pivot point can be moved away from a preferably fixed ⁇ fixed contact piece.
• the swivel arm comparatively ⁇ filigree be constructed so that only small masses are herumzuschwenken about the pivot point.
• the reduced length of the pivot arm a sufficiently stable pivot arm can be formed even with a delicate On ⁇ construction. To swinging mass is reduced and a zuverlässi ⁇ ges contacting the contact pieces is possible. It is pos ⁇ lich to optimize the screw jack in terms of mechanical stability, as this moves the bearing point with a swivel arm in the room.
• a contact / separation of the contact pieces is completed by a pivoting movement of a pivoting arm.
• the lifting gear and the pivot arm are independently controlled in their movements. For example, movements of the swivel arm and the lifting gear can take place in succession. It is advantageous, however, if the movement of the swivel arm and the BEWE ⁇ movement of the lifting gear overlap each other at least in sections, so that a resulting movement of the second contact piece is composed of a movement of the lifting gear and a movement of the swivel arm. Thus, it is possible to move the contact piece on a trajectory different from a circular path.
• a synchronization of the movements of swivel arm and lifting gear takes place. It may be provided at ⁇ play, that in dependence on the back ⁇ defined path of the lifting gear mechanism, the pivot arm pulls on a certain pivot angle. It can be provided a direct Pro ⁇ portion Rund between the movement of the lifting gear mechanism and the pivoting movement of the pivot arm.
• a further advantageous embodiment may provide that the screw jack emits a linear movement.
• the screw jack By means of the screw jack it is possible to make a linear BEWE ⁇ supply.
• This linear movement can be transmitted to the swivel arm, for example.
• the linear movement can be discharged through a correspondingly robust construction over ⁇ thereby so that on the screw jack, a linearly movable platform is provided for a rotary bearing of the pivot arm.
• a screw jack for example, a spin ⁇ delgetriebe be used, which convert a rotational movement in a simple manner in a linear stroke movement and so deliver a rotational movement proportional stroke to a seated on the spindle nut.
• other forms of transmission can be used.
• the screw jack can be telescopic.
• the stroke mechanism and / or the pivot arm can be formed as part of a current path, so that a contact of the pivot arm is arranged on the first contact piece via a current path as latestbil ⁇ Deten swivel arm.
• Swivel arm has a pivot point at a free end of the Hubgetriebes.
• a pivot point for the pivot arm at a free end of the lifting gear makes it possible to spend the fulcrum as close as possible to the environment of the second contact piece.
• Mit ⁇ means of the swing arm then the last remaining piece of the outdoor switching path can be bridged until the two contacts are in electrically conductive connection.
• a position of the fulcrum at a free end makes it possible to spend the fulcrum as free as possible of conversions or attachments in the vicinity of the second contact piece.
• a further advantageous embodiment may provide that the fulcrum is movable on a substantially linear trajectory.
• a method of fulcrum along a linear trajectory makes it possible to keep lateral accelerations away from the fulcrum.
• the fulcrum should be configured in the form of a rotation axis, which is aligned radially to the linear path curve. As a result, forces in a linear direction can be initiated directly in the bearing of the fulcrum. Tilting and possibly accidental pivoting of the pivot lever by lateral forces in a non-linear method of the fulcrum is avoided.
• a further advantageous embodiment may provide that the lifting gear a toggle mechanism, in particular a
• Scissors gear is.
• a toggle mechanism has holm shame lever elements which are hinged together and can be pulled apart accordion-like or pushed together.
• the possibility is given to vary the lifting height of the lifting gear, for example, on the one hand by the number of lever elements to be deflected or, moreover, to change the axia ⁇ le extension of the lever elements.
• a comparatively large stroke can be generated in a compact space.
• a scissors gear before ⁇ part way that it can perform a substantially line- are moving freely in space, since the lever members / pivot members support one another.
• Guide elements such as supporting frames, scenes or other components, which would be positioned along the path of the lifting gear, are not required in a scissors gear.
• a scissors gear may be variously constructed. Scissor elements can cross each other and be rotatably connected at the intersection. However, it can also be provided that the scissors elements are coupled toggle are divided. This has the advantage that sub-beams of the toggle lever fixedly schla ⁇ can be pivotally gene, so that a rotary movement are fixed divisible into sub-beams, such that movement of the upper struts on the toggle lever can be transferred.
• the toggle can be oriented in opposite directions and driven in opposite directions, so that the free ends of the toggle stabilize each other and deliver a linear movement. So can be formed by means of two toggle a pair of scissors.
• a further advantageous embodiment may provide that the toggle mechanism, in particular scissors gear, at ⁇ least one upper beam and a lower beam, wherein the pivot arm is connected to the upper beam.
• a scissors gear has at least one upper spar and a lower spar, which are rotatably connected to each other and thus form, for example, a knee lever.
• a pair of scissors can be formed, with the upper spar of which the pivoting arm is connected.
• Swivel arm and upper beam can be connected to each other with angular rigidity or rotation.
• At the top of the pivot point of the pivot arm can be arranged.
• the first contact piece is a fulcrum contact piece.
• the first contact piece as a Einschlaglich classroom allows the first contact piece to move freely through the room and to let in the second contact piece, which acts as a counter-contact piece.
• Contact piece for example, bolt-shaped, knife-shaped, tulip-like, slit-shaped with contact fingers, etc., be ⁇ staltet.
• a Einschlagrome scholar needed for its function, a counter-contact piece, which brings a counter force, to allow a resilient contact of the two contact pieces.
• Einschlag ⁇ contact piece By using a Einschlag ⁇ contact piece, it is possible to move the swivel arm at the free end through the room. An opposing force is given by the gencript harmony provided.
• the first contact piece can be kept structurally simple and gripping arms, etc. can be avoided on the first contact piece.
• the second contact piece should be stored stationary.
• a further advantageous embodiment may provide that the second contact piece is surrounded by an annular shield electrode.
• annular shield electrode it is possible to shield the contacting region of the first and second contact piece dielectrically.
• sharp-edged blade contact pieces can also be used as contact pieces.
• the annular shield electrode prevents the occurrence of discharges within the shielded area.
• the second contact piece may be Annae ⁇ hernd arranged centrally in the ring electrode.
• the first contact piece can dip into the screen area of the ring electrode. Since the movement of the first contact piece from egg ⁇ ner overlay is composed of a linear and a pivoting movement, in particular in the formation of the first contact piece is pivoting ⁇ A hit in the second contact piece allows a knife contact.
• the contact area of the two contact pieces can be positioned within the shielded area of the ring electrode.
• the pivoting first contact piece can be moved by a stroke into the interior of the ring electrode.
• a further advantageous embodiment can provide that the toggle mechanism, in particular scissors gear, kraftre ⁇ - producing countermass pieces.
• the toggle mechanism with upper and lower beam can be equipped with kraft ⁇ reducing countermass pieces, so that a movement of the moving spars is supported by the countermass pieces.
• the movement is supported by gravity-driven countermass pieces under ⁇ .
• a switch-off movement it is counteracted against the force of the countermass pieces, so that a switch-off movement is slowed down by the counterweight pieces.
• a movement can be supported or braked by a spring.
• Springs can be used individually or in packages. The design of the spring can vary. For example, tension springs, compression springs, torsion springs, etc. can be used.
• a further advantageous embodiment may provide that the pivot arm is connected at an obtuse angle with an upper beam of the toggle mechanism, in particular the scissors gear.
• a further advantageous embodiment may provide that the upper beam is folded in a pivot point of the pivot arm. A fold in the pivot allows a spacing of the first contact piece of the screw jack. Thus, a safety distance is formed by the first contact piece to the lifting gear, which prevents a striking of the first contact piece to the lifting gear.
• a further advantageous embodiment can provide that the outdoor switching device is a grounding switching device.
• an open-air switching device as a grounding switching device makes it possible, for example, to ground phase conductors on open-air-insulated switchgear or outdoor transmission lines under outdoor conditions.
• the first contact piece permanently leads to ground potential, wherein a contacting of the first contact piece via the pivot lever and the Hubge ⁇ gear can take place.
• elements of the Hubgetriebes and the pivot lever itself are electrically conductive formed as a grounding current path.
• the pivot lever and screw jack are accompanied by a reversibly deformable grounding ⁇ current path, which leads a ground potential up to the first contact piece.
• a grounding switching device can be arranged at ⁇ play on an electrically insulating support insulator which so-as a chassis for the lifting gear such as the swing arm is used.
• the outdoor switching device can be designed for example as a single-pole open-air switching device. However, it can also be seen ⁇ before, that the outdoor switching device is designed as a multi-pole, especially three-pole, outdoor switching device.
• a multi-pole open-circuit switching device is one of the number of phase conductors corresponding number of pivoting levers and lifting gear use, for example, a Forming a respective separate grounding current path to serve each of the phase conductors of a multi-phase Elektroenergyübertra ⁇ supply network.
• Figure 1 is a perspective view of an outdoor switching device
• FIG. 2 shows a detail of the outdoor switching apparatus shown in FIG.
• FIG. 3 is a plan view of that shown in FIG.
• the outdoor switching device has a first post insulator 1.
• the first support insulator 1 is presently exemplified as a columnar first support insulator 1, which is supported on a foundation.
• the longitudinal axis of the first post insulator 1 is vertically aligned.
• At its end of the foundation for supporting a base plate 2 is arranged on the first support insulator 1.
• the base plate 2 serves to position a drive arrangement 3.
• a drive cabinet 4 is furthermore arranged on the base plate 2.
• Arranged in the drive cabinet 4 are devices which serve to move the drive arrangement 3.
• an electric motor can be arranged, which converts an electrical energy into a movement, which is transmitted to the Antriebsanord ⁇ tion 3.
• control and monitoring units, protective devices, locking devices, etc. can also be arranged in the drive cabinet.
• the drive arrangement 3 has a lifting gear 3a and a swivel arm 3b.
• the design of screw jack 3a and pivot arm 3b are shown in more detail in Figures 2 and 3. In the figure 1, the drive assembly 3 is shown schematically.
• first contact piece 5 is arranged.
• the drive assembly 3 is subjected to ground potential, so that the first contact piece 5 permanently leads to ground potential.
• an air-insulated switching path (free air switching path) is arranged.
• the second contact piece 6 is arranged electrically insulated from the first contact piece 5.
• a second support insulator 7 is provided for holding the second contact piece 6, .
• the second supporting insulator 7 is fixed in an analogous manner as the first supporting insulator 1 to a foundation and at its ist ⁇ faces of the foundation end of the second contact piece 6 is fixed angularly rigid.
• the second contact piece 6 is electrically conductively connected to a phase conductor 8.
• a permanent composite is formed, so that the second contact piece 6 always has the same electrical potential as the phase conductor 8.
• the phase conductor 8 is designed as an overhead line.
• second support insulator 7 for positioning the second contact piece 6
• alternative support elements can also be used to position the second contact piece 6.
• insulating arrangements provided for supporting the phase conductor 8 may position the second contact piece 6.
• the use of a separate second post insulator 7 is not necessary.
• the second contact piece 6 should be held rigidly fixed, so that the second contact piece 6 is immovable relative to the first support insulator 1 / the base plate 2.
• the second contact piece 6 is surrounded by a ring electrode 9.
• the ring electrode 9 is in the present case designed in the manner of a toroid.
• the ring electrode 9 carries the same electrical potential as the second contact piece 6.
• a field-free space is formed in the interior of the ring electrode 9.
• the second contact piece 6 is arranged with its contact region, so that upon contact with the first contact piece 5, contact is made within the dielectrically shielded space.
• FIG. 2 shows by way of example the design of the drive arrangement 3 in a side view.
• the lifting gear 3 a is designed in the form of a counter-rotating, deflecting Kniehe ⁇ bel aufeisenden scissors gear.
• the Scherenge ⁇ gear has a lower beam 10 and an upper beam 11.
• the lower beam 10 is pivotally mounted at one end to the base plate 2.
• the lower beam 10 is connected via a so- ⁇ -called middle joint 12 to one end of the top bar.
• 11 In order to support a guide of the center joint 12 on a circular path, mirror-symmetrically to the longitudinal axis of the first support insulator 1, a further upper beam IIa and a further lower beam 10a are arranged in opposition.
• the further lower beam 10 a is in turn pivotally mounted with its one end to the base plate 2.
• To the other end of the further sub-beam 10a is connected via a further hinge means 12 to one end of the wide upper ⁇ ren Holmes IIa.
• the other end of the further upper spar IIa is connected to the other end of the upper spar 11 via a universal joint 13.
• the lower beam 10 and the further lower beam 10 a, the upper beam 11 and the further upper beam IIa thus each form a toggle, which are connected to each other via the universal joint 13, so that in an opposite rotational movement of the lower spar 10 and the wei ⁇ direct lower spar 10 a Lifting movement of the universal joint 13 takes place.
• the universal joint 13 thereby moves on a in Essentially linear trajectory.
• the two toggle levers are part of a scissors gearbox.
• a linear trajectory of the lifting gear 3a / universal joint 13 is aligned in the direction of the longitudinal axis of the first support insulator 1.
• countermass pieces 14a, 14b are arranged on the lower beam 10 and on the other lower beam 10a.
• the countermass pieces 14a, 14b generate during a lifting movement of the lifting gear 3a a counterforce to the moving sub ⁇ spars 10, 10a and upper spars 11, IIa.
• the universal joint 13 provides a pivot point for the pivot arm 3b available, wherein the pivot arm 3b along the path of movement of the universal joint 13 with the universal joint 13 is displaceable.
• a pivot of the pivot arm ⁇ 3b should be arranged in the region of the universal joint. 13
• a pivoting of the pivot arm 3b is made possible around a pivot point, which along the trajectory of the movable cross ⁇ joint 13 is displaceable.
• the pivot arm 3b is pivotable. Thereby, the first contact piece 5 can be moved around the pivot point of the pivot arm 3b on a circular path.
• the second contact piece By overlaying the circular path that can be generated by the pivoting arm 3b on the first contact piece 5 and the linear trajectory provided by the lifting gear 3a, the second contact piece is moved on a trajectory curved along the stroke of the lifting gear 3a.
• the corresponding trajectories of the central joints 12, 12a of the universal joint 13 and a resulting trajectory of the first contact piece 5a are shown by dash-dotted lines.
• a pivoting movement of the pivot arm 3b can be carried out independently of time of a movement of the lifting gear 3a.
• ⁇ nearest the lifting gear 3a is a linear displacement of the rotary Point of the pivot arm 3b causes and subsequently (or vice versa) pivoting of the pivot arm 3b is triggered and a contacting of the two contact pieces 5, 6 takes place.
• a movement of the lifting gear 3a and the pivot arm 3b takes place at the same time, so that the first contact piece 5 performs a resulting movement resulting from a superposition of a caused by the lifting gear 3a linear trajectory and one of the pivot arm 3b composed circular path composed.
• arm 3b is vorgese ⁇ hen.
• the swivel arm 3b is connected in an angularly rigid manner to the further upper beam IIa.
• the further upper beam IIa has a linearly extended rod shape, wherein the pivot arm 3b likewise has a linearly stretched rod shape.
• the pivot arm 3b and the further upper beam IIa abut each other, wherein between the longitudinal axes of the further upper beam IIa and the pivot arm 3b an obtuse angle is included.
• the first contact piece 5 is presently designed as Einschlagrome ⁇ piece.
• the first contact piece 5 is designed to bolt-shaped, this bolt is hammered into a counter-shaped second contact piece 6 at the end of a movement.
• the second contact piece 6 is such a rigid angle positioned such that it applies a reaction force to a contact of the first contact piece 5 to ermögli ⁇ chen.
• FIG. 3 shows a plan view of the drive arrangement 3 shown in Figure 2.
• the lower beam 10 as well as the additional lower beam 10a run in duplicate, so that it congruently one behind the other lie - provide bearings for the middle joints 12, 12a.
• the upper spar 11 and the further upper spar IIa are rotatably connected to the respective middle joint 12, 12a between the respective paired lower bars 10 and further lower bars 10a.
• the upper beam 11 and the further upper beam IIa support each other in the universal joint 13. Only one of the upper spars 11, 11 is connected to the first contact piece 5 via the pivot arm 3b angularly rigid.

Landscapes

• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Gas-Insulated Switchgears (AREA)
• Transmission Devices (AREA)

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Citations (6)

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• 2011
  • 2011-06-17 DE DE201110077768 patent/DE102011077768A1/de not_active Ceased
• 2012
  • 2012-06-08 WO PCT/EP2012/060898 patent/WO2012171855A1/de active Application Filing
  • 2012-06-08 CN CN201280029844.8A patent/CN103620717B/zh not_active Expired - Fee Related
  • 2012-06-08 RU RU2014101293A patent/RU2608753C2/ru active

Patent Citations (6)

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