WO2016151002A1 - Buse isolante et dispositif de commutation électrique pourvu dune buse isolante - Google Patents

Buse isolante et dispositif de commutation électrique pourvu dune buse isolante Download PDF

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Publication number
WO2016151002A1
WO2016151002A1 PCT/EP2016/056348 EP2016056348W WO2016151002A1 WO 2016151002 A1 WO2016151002 A1 WO 2016151002A1 EP 2016056348 W EP2016056348 W EP 2016056348W WO 2016151002 A1 WO2016151002 A1 WO 2016151002A1
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WO
WIPO (PCT)
Prior art keywords
channel
insulating nozzle
region
contact piece
cross
Prior art date
Application number
PCT/EP2016/056348
Other languages
German (de)
English (en)
Inventor
Radu-Marian Cernat
Andreas Groiss
Thomas Krull
Edelhard Kynast
Volker Lehmann
Andrzej Nowakowski
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2016151002A1 publication Critical patent/WO2016151002A1/fr

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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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Definitions

  • Insulating nozzle and electrical switching device with the insulating nozzle Insulating nozzle and electrical switching device with the insulating nozzle
  • the invention relates to an insulating nozzle for an electrical switching device and an electrical switching device comprising the insulating nozzle, having a first inner region on a first side, adapted for receiving a first electrical contact piece, and a second inner region on a second side, adapted for receiving a second electrical contact piece ,
  • the second contact piece is movable relative to the first contact piece arranged.
  • a continuous channel is arranged, designed as a constriction of the insulating nozzle.
  • High voltage circuit breakers are electrical switching devices for switching voltages, in particular greater than 70 kV and currents, in particular in the range of 10 A up to
  • the switching devices are designed to connect and disconnect circuits and to safely conduct operating and short-circuit currents in the closed state.
  • arcs usually occur, which support the switching process and can be safely controlled.
  • a special design of the switching device which comprises a breaker unit with two contact pieces and an insulating nozzle, ensures that erosion arcs occurring during switching.
  • Such electrical switching device with insulating is known for example from the document DE 296 07 660 Ul.
  • a particular embodiment of electrical switching devices for switching high voltages are Diskomp- ressions high voltage circuit breakers. They usually have two contact systems, the rated current and the arc contact system. The rated current contact system in the closed state is a low-resistance connection between two
  • the arcing contact system is erosion-resistant and only appears during the switching operations. It carries the arc at a switch-off from the time of contact separation to deletion and when switching from pre-flashover to contact.
  • the two contact systems are staggered so that when opened the rated current contact system opens in front of the arcing contact system and closes when closing the rated contact system after the arcing contact system.
  • the rated current contact system is not exposed to the switching arc, and due to the different impedance of the two contact systems, only low-energy commutation arcs are produced at the rated current contact system.
  • the arcing contacts which are also referred to as contact pieces, are guided with a small gas gap through an auxiliary and insulating nozzle, thereby producing a wall-stabilized switching arc.
  • a flow through the constriction is prevented or reduced, and thereby a pressure build-up in a heating volume is effected.
  • the Contact system In addition to mechanical damage caused by unfavorable collisions of the arcing contacts with insulating parts, there is a risk, from a dielectric point of view, that the field strength load will reach critical values when the gas gap is reduced, resulting in overloading of the insulating parts.
  • the Contact system must be designed to be operated in as short a time as possible, whereby it is accelerated quickly to high speeds, and is braked back to a rest position after a relatively short distance.
  • the movement sequence is controlled by a complex transmission in which components mesh, collide and / or deflect. In the course of the longitudinal movement, the contact system experiences an additional transverse acceleration, which can lead to a pendulum movement of the arcing contacts in the nozzle restriction. The distance between contact and insulating part can thus fall below a critical level.
  • Object of the present invention is to provide an insulating nozzle for an electrical switching device, in particular a high-voltage circuit breaker, which solves the problems described above.
  • it is an object to provide a structure of an insulating nozzle, which prevents contact of arcing contacts with the insulating nozzle, at least in the region of the arc and ensures good pressure build-up in the heating volume.
  • an insulating nozzle for an electrical switching device with the features according to claim 1 and / or by an electrical switching device according to claim 14.
  • Advantageous embodiments of the insulating nozzle according to the invention and / or electrical switching device are specified in the subclaims.
  • objects of the main claims with each other and with features of subclaims and features of the dependent claims can be combined with each other.
  • Switching device comprises a first inner region on a first side, adapted to receive a first electrical contact piece, and a second inner region on a second side, adapted for receiving a second electrical contact piece.
  • the second contact piece is movable relative to the first contact piece arranged.
  • the insulating nozzle further comprises a continuous channel, arranged in a region between the first and the second inner region, which is formed as a bottleneck of the insulating nozzle. According to the invention, the channel has at least two different areas with mutually different cross sections.
  • Diameter of the Isolierdüsenengstelle be made larger than technically required, especially in a first region of the channel.
  • the pressure build-up in the heating volume which is necessary to extinguish an arc, would be reduced. Therefore, in a region of the channel with low dielectric stress, a reduced diameter of the channel is selected, whereby a sufficient pressure build-up can be ensured and a guide of contact pieces takes place.
  • a contact of the arcing contacts with the nozzle throat can be prevented by a large channel cross-section or channel diameter and by a second region with low dielectric stress, which has a small channel cross-section or channel diameter , a sufficient pressure build-up can be guaranteed.
  • the first region of the channel may have a cross-section which is substantially larger than the cross-section of a second region of the channel, in order to reduce the interaction upon occurrence of an arc between the first and the second contact piece with material of the insulating sleeve.
  • the first region is arranged in particular on one side of the channel to the first side of the insulating nozzle out.
  • this area which is highly stressed by dielectrics, a defined, large distance between arcing contact and insulating material is maintained by the bottleneck geometry with a large cross section. Threading into this area without touching the insulating material of the nozzle is facilitated by an increased diameter in this area.
  • a second region of the channel may have a second cross section, which is substantially in the region of the cross section of the second contact piece, for mechanical support of the second contact piece, the region being arranged in particular on one side of the channel towards the second side of the insulating nozzle.
  • this area is a
  • the at least one first region of the channel may have a cylindrical shape, in particular in conjunction with a cylindrical second region of the channel.
  • an equal distance to all sides between the insulating material and the contact piece can be ensured, in particular in a phase of the strong approximation of the contacts to one another.
  • a greater distance, in particular, which remains constant in a phase of strong approach, ensures little to no interaction of the arc with the insulating material in this area.
  • a cylindrical second region of the channel ie a cylindrical shape of the insulating nozzle throat in the second region of smaller cross-section than the first region has the advantage the switching arc comes into contact with the insulating material as early as possible in terms of time, and an increase in pressure in the heating volume is initiated as early as possible.
  • the at least one first region of the channel may alternatively or additionally have a conical shape, in particular the shape of a truncated cone with a top surface which has the cross section of the first region of the channel and a base surface with a larger cross section, the base surface being on the side the channel is arranged to the first
  • a conical inlet bevel can be arranged, in the form of a truncated cone with increasing cross section in the direction of the second side of the insulating. This allows a better threading of a contact piece in the bottleneck, without jamming or strong mechanical stress of the insulating nozzle material.
  • a mechanical damage to the insulating nozzle by abrasion upon contact of the contact piece with the insulating material, eg. B. with pendulum movement of the contact piece with respect to the central axis of the nozzle is prevented or at least reduced.
  • a strong mechanical damage to the nozzle, z. B. by tilting or wedging the contact piece in the bottleneck is prevented.
  • the conical inlet slope towards a central axis of the insulating nozzle may have an angle in the range of less than 10 degrees. In this area, a small angle between the contact piece and its direction of motion is given, so that upon mechanical contact of the contact piece with the Isolierma- material, the contact piece is directed back in the direction of the central axis, without jamming or to produce large material abrasion.
  • a cylindrical inlet area can be arranged, with a cross section larger than the cross section of the second region. This has the same effect as the conical inlet slope described above, and can facilitate threading the contact piece into the throat of the nozzle.
  • a cylindrical inlet region is simpler and cheaper to produce than a conical inlet slope.
  • a cylindrical portion having a second cross section smaller than the first cross section may be arranged. This results in a geometry with advantages, as previously described for a cylindrical inlet slope and a cylindrical first and second area.
  • the insulating nozzle, regions of the channel, and / or the channel itself can be rotationally symmetrical, in particular with circular cross sections.
  • a clamping device and / or a thread for holding the nozzle can be arranged, in particular a thread circulating around the nozzle.
  • the nozzle may be mechanically secure and fixed in the electrical switching device, in particular on the side and with the tulip contact adjacent to the boiler room, in which the heated gas can flow.
  • On the second side in an outer region may be arranged a recess for holding a seal, in particular a PTFE seal.
  • the second side can be stored gas-tight mechanically stable in the electrical switching device.
  • the insulating nozzle may be made of PTFE or include PTFE.
  • PTFE as a material for the insulating nozzle shows good electrical insulator properties, good mechanical, chemical and thermal properties. mixed stability, and can prevent jamming by its mechanical lubricating properties of contact pieces.
  • An electrical switching device comprises a first and a second electrical contact piece, wherein the second electrical contact piece is arranged to be movable relative to the first electrical contact piece. Furthermore, the electrical switching device comprises an insulating nozzle described above.
  • the electrical switching device can be designed in the form of a compressed gas-insulated circuit breaker.
  • the advantages of the electrical switching device according to the invention are analogous to the advantages described above in connection with the insulating nozzle.
  • the second electrical contact piece may have a complementary shape and / or a substantially same cross-section to at least a portion of the channel or the bottleneck. With a complementary shape and a cross section in the region of the throat of the channel, in particular the region with the smallest cross section, a good, temporary gas seal of the channel can be effected.
  • Heating, expanding gas in the region of an arc can expand in the direction of the heating chamber, in particular by a fluid channel z.
  • B. comprises from the first side of the insulating nozzle, and the gas can bring in a second step, in a backflow extinguish the arc.
  • FIG. 1 shows a section along a longitudinal axis 2 of an insulating nozzle 1 for an electrical switching device according to the prior art
  • FIG. 2 shows a section analogous to FIG. 1 with a channel 5, which connects a first side 3 and a second side 4, and according to an exemplary embodiment of the invention has at least two cylindrical regions 8, 9 with different cross sections, and
  • FIG. 3 shows a section analogous to FIG. 2 with a channel 5, which has a cylindrical 9 and a conical 8 region, and
  • FIG. 4 shows a section analogous to FIG. 1 with a run-in slope 10 in the channel 5 towards a side 4, and
  • FIG. 5 shows a section analogous to FIG. 2 with a channel 5, which has two cylindrical areas 8, 9 with different cross-sections and an inlet bevel 10 analogous to FIG. 4, and FIG
  • FIG. 6 shows a section analogous to FIG. 1 with a channel 5, which has a cylindrical region 12 which encloses a cylindrical region 13 with a smaller cross section
  • FIG. 7 shows a section along the center axis 2 of an electrical device according to the invention
  • FIG. 1 shows an insulating nozzle 1 for an electrical
  • the insulating nozzle 1 is constructed rotationally symmetrical about the central axis 2.
  • the wall of the insulating nozzle 1 encloses on a first side 3 a substantially cylindrical cavity with a first diameter d i ( and on an opposite, second side 4 a substantially conical cavity with an equal or smaller diameter d 2 , which in Rich A continuous channel is arranged between the two sides 3, 4, which is designed as a constriction 5 and has substantially the shape of a cylindrical cavity, with a third diameter d 3 , which is smaller than the diameter di on the first side 3 and the diameter d 2 on the second side 4.
  • the diameters may be in the range of millimeters, in particular the first diameter di in the range of 50 to 100 mm, the second diameter d 2 in the range of 30 to 60 mm and the third diameter d 3 in the range of 20 to 30 mm.
  • a clamping device 6 is provided on the outer circumference of the insulating nozzle 1 in order to secure the insulating nozzle 1 in an electrical switching device.
  • other fastening devices may be used, for. B. thread 6.
  • the insulating nozzle 1 are mechanically stable to electrical contact pieces on the first page 3 are attached.
  • a recess 7 for holding a seal is provided on the outer periphery of the insulating nozzle 1, which also takes the form of a clamping device may be to secure the insulating nozzle 1 in an electrical switching device.
  • the seal allows z.
  • As a PTFE seal can be used.
  • FIG. 2 shows an insulating nozzle 1 in accordance with the invention
  • the insulating nozzle 1 has a channel 5 which connects the cavities of the first side 3 and the second side 4 of the insulating nozzle 1 with each other.
  • the channel 5 comprises at least two cylindrical regions 8, 9 with different cross sections.
  • the first region 8 has a larger diameter than the second region 9.
  • a second contact piece can be inserted from the second side 4 when contacted in the insulating nozzle.
  • the first contact piece may be fixedly arranged in the cylindrical cavity of the first side 3 near the channel 5.
  • an arc develops between the contacts, which is also referred to as a rollover.
  • the distance of the contact pieces is still relatively large and the dielectric stress of the Isolierdü- senmaterials low.
  • the second contact piece is inserted into the channel 5 in the second region 9 with a small diameter.
  • the contact piece may have a diameter substantially in the region of the diameter of the channel 5 in the second region 9, with a complementary shape, or a slightly smaller one Diameter. Due to the small size of a gap between moving contact piece and channel 5 in the second region 9, a gas exchange or gas flow in this area is prevented or impeded. The movement of the second contact piece and the heating of the gas in the region of the arc, wherein the gas expands due to the heating, lead to a pressure build-up in the region between the contact pieces.
  • the high pressure may allow gas to flow into a pressure chamber, as will be described in detail below in connection with FIG.
  • the second contact piece moves with its tip in the channel 5 in the first region 8 with a larger diameter than the diameter of the second region 9. This gives a greater distance between the material of the insulating nozzle 1 and the second contact piece in this area. The material is less stressed and thus less or not damaged.
  • FIG. 3 shows an insulating nozzle 1 in a sectional view similar to FIG.
  • the channel 5 has a conical region 8 adjacent to a cylindrical region 9.
  • the conical region has the shape of a truncated cone, with a larger base area toward the first side 3 towards the cover surface toward the second side 4, which corresponds to the cross-sectional area or base area of the cylinder which surrounds the channel 5 in FIG second area 9 forms.
  • the diameter of the channel 5, starting from the end of the second area 9 towards the first side 3 in the first area 8 increases continuously.
  • the advantage of the increase in the distance between the contact piece and insulating material in the direction of the first page 3 is analogous to the embodiment of Figure 2 with a cylindrical shape, instead of conical shape of the channel 5 in area 8 in Figure 3.
  • the increasing distance between the contact piece and insulating material in the direction of the first Page 3 results in an increasing distance between the contact piece and insulating material upon movement of the contact piece in the direction of the first page 3, wherein the distance between the two contact pieces is reduced to each other.
  • the constriction in the region 9 of the channel 5, with essentially the same diameter and the same shape as the contact piece has the advantages described above, that the contact piece is mechanically supported for the suppression of z. B. pendulum movements and that an early pressure build-up occurs when the gas is heated by the arc. As the dielectric load increases, the distance between the contact piece and the insulating material increases, which prevents or reduces damage to the insulating nozzle 1.
  • FIG. 4 shows an insulating nozzle 1 similar to the insulating nozzle in FIG. 1 in a sectional view.
  • the insulating nozzle 1 has in the channel 5 on the side of the channel 5, which faces the second side 4, an inlet bevel 10.
  • the inlet slope 10 may, for. B. in the form of an inner circumferential surface of the channel 5, which forms an angle to the center axis in the range of 10 °.
  • This lateral surface may be in the form of a lateral surface of a cone, which ends with a cover surface in the direction of the first side 3, which is a cross section of the cylindrical channel part 5.
  • the inlet slant facilitates insertion of the contact piece into the channel 5, in particular without tilting the contact piece or material abrasion from the insulating nozzle 5.
  • FIGS. 4 and 5 show an insulating nozzle 1 analogous to the insulating nozzle 5 of Figure 2 is shown in section, with an inlet bevel 10 analogous to the inlet bevel 10 known from the embodiment of Figure 4.
  • an insulating 10 with a conical region 8 as shown in FIG. 3, and an inlet bevel 10, as shown in FIGS. 4 and 5.
  • the advantages are, as described above, analogous to the advantages of a run-in slope 10, as shown in FIGS. 4 and 5, and an increased diameter of the passage 5 in the region 8, as shown in FIGS. 2, 3 and 5.
  • FIG. 6 shows an insulating nozzle 1 with a continuous, cylindrical channel 5 analogous to the channel 5 in FIG. 1, wherein a cylindrical region 13 with a second, smaller diameter is arranged in a cylindrical region 12 with a first diameter.
  • the cylindrical region 13 with a smaller diameter shown in the sectional view in FIG. 6 is encompassed by the region 12, wherein the region 13 in the exemplary embodiment of FIG. 6 is arranged closer to the side 4 than to the side 3 in the channel 5.
  • An insulating nozzle 1, analogous to the insulating nozzle 1 shown in FIG. 5, only has a cylindrical inlet region instead of a conical inlet region 10. The advantages are as described in the exemplary embodiment of FIG. 5, whereby a cylindrical inlet region can be manufactured more simply and less expensively as a conical inlet region 10.
  • FIG. 7 shows a section along the central axis 2 of an electrical switching device 14 with insulating nozzle 1, it being possible to use an insulating nozzle according to the invention described above as the insulating nozzle.
  • the electrical switching device 14 in particular designed as a high-voltage power switch, comprises a first and a second electrical contact piece 15, 16, ie lighting bow contact pieces, which are arranged coaxially facing each other. Furthermore, the electrical switching device 14 comprises two coaxial oppositely arranged continuous current contact pieces 18, 19, each of which a contact piece 15, 16 surrounded.
  • the first contact piece 15 is designed as a tulip contact and is driven in the course of a switch-off movement in the direction of the arrow 20.
  • an arc 17 which contains the extinguishing gas in its sphere of influence, for. B. SF 6 heats up.
  • This extinguishing gas flows at least partially through a channel 21, which is formed as a jacket between the tulip contact piece 15 and the first side 3 of the insulating nozzle 1.
  • the quenching gas flows through the channel 21 into the heating gas chamber 22, where it is first stored and from where it flows back to the arc 17, as soon as the quenching gas pressure drops there. This is normally the case with a current zero crossing of the current to be switched.
  • Extinguishing gas then inflates the arc 17 and supports the deletion or the dielectric reconsolidation of the
  • the insulating nozzle or insulating gas nozzle 1 is provided, which surrounds the arc.
  • the insulating material nozzle 1 can be greatly accelerated with the drivable first contact piece 15 during the switching-off operation in the direction of the arrow 20.
  • both contact pieces 15, 16 are driven and thus moved toward each other. Due to the greatly accelerated movement and because of the high prevailing in the region of the insulating nozzle 1 temperatures and gas pressures, the insulating nozzle 1 must be particularly stable and secure to a connected to the drive of the switch component, eg. B. the cylindrical flange 23 may be attached. The insulating nozzle 1 is screwed into the flange 23
  • a thread and / or a clamping device 6 In the case of a version with a thread 6, this can engage in an internal thread of the flange 23.
  • the electrical switching device 14 which may be designed as a breaker unit of a high-voltage circuit breaker, a nozzle 24 is pushed into the insulating nozzle 1 and supports the insulating nozzle 1 against radial deformation from the inside.
  • the nozzle 24 is connected to a flange 25 which radially covers the nozzle body 1 and is connected to the cylindrical flange 23 by means of screws 26. This ensures that the nozzle 24 is not rotatable.
  • the nozzle 24 may have a knurling on its outer circumferential surface, which may be pressed into the nozzle body 1 and presses against the inner circumferential surface 27 on the first side 3. As a result, a rotation of the insulating nozzle 1 in the thread 28 can be prevented.
  • the electrical switching device 14 may be sealed gas-tight in an insulating housing 29, so that no insulating gas, eg. B. SF 6 can escape into the environment.
  • the nozzle 24 and the flange 25 may be made of metal, for example aluminum.
  • the insulating nozzle 1 is z. B. of PTFE.
  • a seal for the recess for holding the seal 7 may also be made of PTFE.
  • Contacts 15, 16, 18, 19 are advantageously formed of electrically highly conductive materials, such as. As metals, especially steel or copper.
  • the insulating nozzle 1 is shown in a general form schematically, without showing the inventive design of the channel 5 with different diameters.
  • the use of an insulating nozzle 1 according to the invention, as illustrated in FIGS. 2 to 6 and described above, with a constriction in the form of a channel 5 with different diameters permits rapid pressure build-up in the heating gas chamber 22 when contacting the arcing contacts 15 and 16. and with increasing dielectric load when approaching the contacts 15, 16 in a first area 8, a lower load on the insulating nozzle 1.
  • an inlet slope 10 in the channel 5, i. in the constriction further improves the insertion of the contact 16 with respect to the conical formation of the cavity on the second side 4 of the insulating nozzle 1.
  • a diameter of the constriction 5 in the second region 9 of the channel 5 in the region of the diameter or substantially with the diameter of the second Contact piece 16 allows an early pressure build-up when heating the gas through the arc 17, since a gas flow in the direction of the second side 4 is obstructed or prevented.
  • the heated by the arc 17 gas which is expanded in the direction of the first page 3 and pressed over the channel 21 into the heating gas chamber 22.
  • the tip of the contact piece 16 with the arc 17 passes through the first region 8 of the channel 5, which has a larger diameter than the second region of the channel 9.
  • the larger diameter results in a larger distance of the contact piece 16 to the insulating material of the insulating nozzle 1, whereby the decrease in the distance of the contact pieces 15, 16 increasing dielectric load can be compensated or prevented.
  • the insulating nozzle 1 is less damaged by the larger diameter of the channel 5 in the first region 8 compared to the diameter in the region 9, since a sufficient, defined distance contact piece 16 and insulating nozzle 1 in the region of the light bottom 17 and / or in the first area 8 of Channel 5 can be met.
  • the small diameter in the second region 9, which substantially corresponds to the diameter of the contact piece 16 does not cause the heated gas to move in the direction of the second 4, but in the direction of the first side 3 flows and thus in the Schugasraum 22.
  • at the zero crossing of the current of the arc 17 decreases between the approximated contact pieces 15, 16 and the increased gas pressure in the heating gas chamber 22 leads to a gas flow in the channel 21 in the direction back to the arc 17.
  • the contact pieces 15, 16 are electrically contacted and prevent the formation of arcs when approaching the TreasurestromWallet- pieces 18, 19.
  • An electrical contact between the Treasurestromtitle Stahlen 18, 19 can be done without damage to the Treasurestromtitle Symposiume 18, 19 by arcs.
  • electrical contact interruption the process is analog, only in the opposite direction.
  • the Treasurestromutton Supere 18, 19 can be separated without arcs or damage by arcing.
  • the arc contact pieces 15, 16 are subsequently separated, with an arc 17 being formed between the first and second contact pieces 15, 16.
  • the region 9 of the channel 5 of the insulating nozzle 1, with substantially the same diameter as the contact piece 16, provides a block of a gas flow in the direction of the second side 4, as described above.
  • the gas, which is heated by the arc 17 and expands flows into the heating gas chamber 22.
  • the larger diameter of the channel 5 in the first region 8 provides a greater distance between the contact piece 16 and insulating material of the insulating 1 in this area 8, causing damage of the material is prevented or reduced by the arc.
  • the exemplary embodiments described above can be combined with one another and with exemplary embodiments known from the prior art.
  • the first contact piece 15, in particular tulip contact piece can be permanently installed opposite the insulating nozzle 1 in the electrical switching device 14, wherein the second contact piece 16 is arranged to be movable.
  • both contact pieces 15, 16 may be movably arranged in the electrical switching device 14, in particular also movable relative to the insulating nozzle 1.
  • the insulating nozzle 1 may consist of PTFE, or alternatively or additionally, other insulating materials such.
  • B. plastic include.
  • the insulating gas may consist of SF 6 , other gases or gas mixtures.
  • the insulating nozzle 1 may consist of a cylindrical region on one side and a frusto-conical region on the opposite side and a continuous channel as a constriction, which fluidly connects the two sides.
  • the area on the first page may be different
  • the channel 5 has at least two regions with different cross sections or diameters as bottlenecks.
  • a portion of the channel 5 is formed to block a gas flow toward one side and a second portion is formed in a shape in which damage to the insulating material of the insulating nozzle 1 by an arc is suppressed or at least reduced.
  • the area for blocking the gas flow may alternatively and / or in addition to the suppression of oscillations or other movements of the movable contact in the direction of Isolierdüsenwandung be formed. LIST OF REFERENCE NUMBERS

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Abstract

L'invention concerne une buse isolante (1) destinée à un dispositif de commutation électrique (14) et un dispositif de commutation électrique (14) équipé de la buse isolante (1), comprenant une première zone intérieure sur un premier côté (3), adaptée pour recevoir un premier élément de contact électrique (15), et une seconde zone intérieure sur un second côté (4), adaptée pour recevoir un second élément de contact électrique (16). Le second élément de contact (16) peut être disposé de façon mobile par rapport au premier contact (15). La buse isolante (1) comprend en outre un conduit traversant (5) disposé dans une zone située entre les première et seconde zones intérieures et conçu comme un rétrécissement de la buse isolante (1). Le conduit (5) comporte au moins deux zones différentes (8, 9) de sections transversales différentes.
PCT/EP2016/056348 2015-03-25 2016-03-23 Buse isolante et dispositif de commutation électrique pourvu dune buse isolante WO2016151002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015205388.1A DE102015205388A1 (de) 2015-03-25 2015-03-25 Isolierdüse und elektrische Schalteinrichtung mit der Isolierdüse
DE102015205388.1 2015-03-25

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Publication Number Publication Date
WO2016151002A1 true WO2016151002A1 (fr) 2016-09-29

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WO (1) WO2016151002A1 (fr)

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EP3584816B1 (fr) * 2017-02-20 2024-04-10 Mitsubishi Electric Corporation Disjoncteur à gaz
EP3618088A1 (fr) * 2018-08-30 2020-03-04 ABB Schweiz AG Buse pour disjoncteur haute ou moyenne tension
DE102018216016A1 (de) * 2018-09-20 2020-03-26 Siemens Aktiengesellschaft Hochspannungs-Schaltgerät mit einer Vorrichtung und Verfahren zur Spektralanalyse
EP4053873A1 (fr) * 2021-03-04 2022-09-07 General Electric Technology GmbH Buse isolante pour disjoncteur à configuration interne améliorée

Citations (8)

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DE736317C (de) * 1934-01-05 1943-06-11 Aeg Druckgasschalter
US4939322A (en) * 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker
JPH03134926A (ja) * 1989-10-20 1991-06-07 Toshiba Corp パッファ形ガスしゃ断器
DE29607660U1 (de) 1996-04-22 1996-06-20 Siemens Ag Unterbrechereinheit eines Hochspannungs-Leistungsschalters
EP0809268A2 (fr) * 1996-05-24 1997-11-26 Siemens Aktiengesellschaft Disjoncteur haute tension dÔté d'une tuyère en matière isolante
US6015960A (en) * 1997-10-02 2000-01-18 Gec Alsthom T&D Sa Compressed gas interrupter with a rack mechanism
DE19936987C1 (de) * 1999-07-30 2001-01-25 Siemens Ag Hochspannungsschalter mit Lichtbogenkontakten und einer Elektrode
FR2922679A1 (fr) * 2008-04-15 2009-04-24 Areva T & D Sa Chambre de coupure de disjoncteur a la tenue en tension transitoire de retablissement amelioree.

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US4471185A (en) * 1982-01-04 1984-09-11 General Electric Company Series multiple nozzles for gas blast circuit interrupter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736317C (de) * 1934-01-05 1943-06-11 Aeg Druckgasschalter
US4939322A (en) * 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker
JPH03134926A (ja) * 1989-10-20 1991-06-07 Toshiba Corp パッファ形ガスしゃ断器
DE29607660U1 (de) 1996-04-22 1996-06-20 Siemens Ag Unterbrechereinheit eines Hochspannungs-Leistungsschalters
EP0809268A2 (fr) * 1996-05-24 1997-11-26 Siemens Aktiengesellschaft Disjoncteur haute tension dÔté d'une tuyère en matière isolante
US6015960A (en) * 1997-10-02 2000-01-18 Gec Alsthom T&D Sa Compressed gas interrupter with a rack mechanism
DE19936987C1 (de) * 1999-07-30 2001-01-25 Siemens Ag Hochspannungsschalter mit Lichtbogenkontakten und einer Elektrode
FR2922679A1 (fr) * 2008-04-15 2009-04-24 Areva T & D Sa Chambre de coupure de disjoncteur a la tenue en tension transitoire de retablissement amelioree.

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