EP2569795B1 - Druckgas-leistungsschalter - Google Patents

Druckgas-leistungsschalter Download PDF

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Publication number
EP2569795B1
EP2569795B1 EP11720067.5A EP11720067A EP2569795B1 EP 2569795 B1 EP2569795 B1 EP 2569795B1 EP 11720067 A EP11720067 A EP 11720067A EP 2569795 B1 EP2569795 B1 EP 2569795B1
Authority
EP
European Patent Office
Prior art keywords
volume
gas
contact piece
arc
hot gas
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.)
Revoked
Application number
EP11720067.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2569795A1 (de
Inventor
Radu-Marian Cernat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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
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Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2569795A1 publication Critical patent/EP2569795A1/de
Application granted granted Critical
Publication of EP2569795B1 publication Critical patent/EP2569795B1/de
Revoked legal-status Critical Current
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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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the invention relates to a compressed gas circuit breaker with a arranged between a first contact piece and a second contact piece arc zone, which is connected via a feed channel with a hot gas storage volume and the hot gas storage volume in turn is connected to a volume variable compression volume via an overflow, and with at least one Outflow opening, the compression volume limiting wall.
  • Such a compressed gas circuit breaker is for example in the utility model DE 200 15 563 U1 described.
  • the local compressed gas circuit breaker has a first and a second contact piece, between which extends an arc zone. Within the arc zone, the guidance of an arc is provided.
  • the arc zone in turn is connected via a feed channel with a hot gas storage volume, wherein the hot gas storage volume is followed by a volume variable compression volume.
  • Hot gas storage volume and compression volume are interconnected via an overflow channel.
  • a discharge opening is arranged in a wall bounding the compression volume.
  • the hot gas storage volume is provided to receive hot gas generated during a shift. Depending on the switching process, this amount of gas may vary. It may happen that as much hot gas is introduced into the hot gas storage volume that the pressure in the interior of the hot gas storage volume increases greatly.
  • the in the compression volume provided outflow opening is closed by a pressure relief valve. Upon reaching a certain pressure in the compression volume, the discharge opening is released.
  • the arranged at the outlet pressure relief valve is mechanically but also thermally loaded, which can cause wear on the pressure relief valve. As a result, regular revisions must be made to the discharge opening and the pressure relief valve located there to be serviced or replaced.
  • the object is achieved in a compressed gas circuit breaker of the type mentioned above in that the outflow opening is permanently open at least in the contacted state of the contacts.
  • Compressed gas circuit breakers are electrical switching devices that serve to interrupt currents.
  • a circuit breaker is capable of reliably interrupting both rated currents and residual currents, such as short-circuit currents, several times.
  • Compressed gas circuit breakers have an interrupter unit which serves to guide and position the contact pieces.
  • the interrupter unit is flushed and flooded by an electrically insulating gas (insulating gas), which is under an increased pressure (compressed gas). Increasing the pressure will increase the insulation resistance of the gas increases so that diverging electrical potentials are reliably isolated from each other in a small space by the pressurized insulating gas.
  • Compressed gas power switches have an encapsulating housing, within which the interrupter unit is positioned.
  • the interior of the encapsulating housing is filled with the pressurized insulating gas under pressure.
  • the pressure of the insulating gas is higher than the pressure of the surrounding surrounding the encapsulating medium and may for example be several bar.
  • Sulfur hexafluoride in particular, has proven advantageous as an electrically insulating gas.
  • other suitable electrically insulating gases such as nitrogen or mixtures comprising nitrogen and / or sulfur hexafluoride, etc. may also be used.
  • a compressed gas circuit breaker has at least a first and a second contact piece, between which an arc zone is arranged.
  • the two contact pieces may for example be designed as arcing contact pieces, which are electrically connected in parallel to a first and a second rated current contact piece.
  • Arc contact pieces are designed such that they occur in a switch-on temporally before the rated current contact pieces in galvanic contact with each other. Conversely, in a turn-off operation, the arcing contact pieces are longer in galvanic contact than the rated current contact pieces.
  • the arc contact pieces act in a leading-in at a switch-on and lagging at a turn-off against the associated electrically connected in parallel rated current contact pieces.
  • the rated current contact pieces are optimized in terms of their electrical load capacity, whereas the arcing contact pieces can be optimized in terms of Abbrandfestmaschine against the thermal effects of the arc.
  • the contacts can also take both the arc guide and the nominal current. This construction is particularly advantageous in low-cost switching devices to which only limited demands are made in terms of switching capacity.
  • the contact pieces are configured as separate arcing contact pieces and separate rated current contact pieces or as a combination of light and nominal arc contact pieces, it should be provided that a relative movement of the contact pieces takes place in a switching operation.
  • At least one of the contact pieces is movably mounted with respect to the other contact piece.
  • both arcing contact pieces are movably mounted, so that the contact separation speed can be increased in a switch-off or the contacting speed at a power-up in a simple manner.
  • arcing may occur as the two contact pieces approach each other. Between the contact pieces can occur arcing within the arc zone. The thermal effects occurring cause heating of the insulating gas located within the arc zone. This insulating gas is heated while expanding and converting to so-called hot switching gas or hot gas to. The hot gas should be removed from the arc zone and cooled or cached.
  • a galvanic contact between the two contact pieces is provided at the end of the switch-on process, so that possibly occurring flashovers automatically go out.
  • a burning arc In the arc zone, a burning arc often occurs during a switch-off event.
  • the arc burning in the arc zone expands the electrically insulating gas around it and also erodes further components of the compressed gas circuit breaker located in the immediate vicinity.
  • a plasma cloud of heated electrically isolated gas and vaporized materials such as plastics or metals is formed.
  • this plasma cloud is to be conveyed out of the arc zone as quickly as possible.
  • arc-heated and hot-gas converted electrically insulating gas is conducted via the feed channel into the hot gas storage volume.
  • the feed channel is dammed or released relative to each other via the position of the contact pieces.
  • a volume-variable compression volume which causes a pressure increase by mechanical compression of insulating gas within the compression volume.
  • the gases contained in the compression volume and in the hot gas storage volume can correspond with one another, so that, for example, mixing of gas stored in the compression volume can take place with the gas stored in the hot gas storage volume.
  • Compressed gas circuit breakers can be used to switch currents of any size up to short-circuit currents. For example, a circuit breaker must reliably switch off a rated current as well as a short-circuit current. However, if necessary, the current flowing through the circuit breaker is only a fraction of the rated current. Each of these currents must be switched off reliably. Since, regardless of the amount of current to be interrupted in each case an ignition of a Ausschaltlichtbogens is expected, the circuit breaker must produce a sufficient pressure increased gas quantity for flushing a Ausschaltlichtbogen for each switching case.
  • the compression volume is connected at this time in each case via the discharge opening with the surrounding areas.
  • the compression volume is connected at this time in each case via the discharge opening with the surrounding areas.
  • the outflow openings are closed at the earliest at the time at which a galvanic separation of the contact pieces takes place, ie closing the outflow opening is accompanied by a possible ignition of an arc. It can also be provided that a closure of the discharge opening takes place at the time in which a release of the feed channel takes place, ie, the time at which a return flow of previously expanded and stored in the hot gas storage volume hot gas begins. With the release of the feed channel, the hot gas storage volume be discharged and thus the outflow opening may also be subject to a closure at this time.
  • the outflow opening is permanently open.
  • a discharge opening is provided in a wall of the compression volume, which is independent of the relative position of the contact pieces to each other permanently an opening in the wall of the compression volume.
  • the hot gas storage volume and the compression volume can communicate with each other via an overflow channel. Via the overflow channel, it is thus possible to allow gas volumes to pass from one volume to the other volume. With an arrangement of the discharge opening in the compression volume, overpressure protection of the upstream hot gas storage volume can be granted via the discharge opening within the compression volume.
  • a stroke of the volume variable compression volume is due to the mechanical design of the compressed gas circuit breaker established. Regardless of the amount of current to be interrupted, the same compression pressure in the compression volume is always generated mechanically due to the volume change.
  • the hot gas storage volume is more or less filled with hot gas in proportion to the power of the current to be cut off and the burning arc.
  • Low power currents cause only a small charge of the hot gas storage volume.
  • Currents of corresponding greater strength, such as short-circuit currents cause a correspondingly greater filling of the hot gas storage volume.
  • a blowing of an arc is caused substantially by the action of the variable-volume compression device.
  • a further advantageous embodiment can provide that in the course of the overflow a differential pressure controlled valve is arranged.
  • a corresponding valve assembly can be arranged on the overflow channel, which releases or blocks the channel as a function of the pressure difference in the hot gas storage volume and in the compression volume.
  • the flow resistance of the permeable overflow channel is smaller than or equal to the flow resistance of the opened outflow opening.
  • the flow resistances of the overflow channel and the outflow opening it is possible to control an outflow free of any valves at the outflow opening.
  • an overflow channel with a smaller, in particular a substantially smaller flow resistance than the flow resistance of the outflow opening (s) it can be noted that the outflow of insulating gas compressed in the compression volume via the outflow opening is negligible and enables sufficient compression within the compression volume is. This gives rise to a possibility of keeping the outflow opening free of movable assemblies which possibly block the outflow opening.
  • the compression volume is limited by a piston movable relative to the wall, wherein the outflow opening is temporarily closed by the piston.
  • the compression volume is a mechanical compression device, which compresses due to a volume change in the interior befindliches insulating gas and increases in pressure.
  • the compression volume has a relative to a wall movable piston. If one now uses the stroke of the piston relative to the wall, it is possible to remotely control the outflow opening. Thus, it is possible to synchronize the timing of the closing of the discharge opening with respect to the time of the contact separation or the release of the feed channel or to a certain contact distance, etc.
  • a movement of the piston can be synchronized with one another via a corresponding gear arrangement with the relative movement of the contact pieces.
  • a path control has the further advantage that the outflow opening are dammed by otherwise necessary assemblies. This additional valves or the like are prevented and given a robust construction.
  • the wall is a circular cylindrical lateral surface of the compression volume.
  • the compression volume may for example have a lateral surface of a circular cylinder.
  • a corresponding shape-complementary piston is movable, which is displaceable in the longitudinal axis of the cylinder axis of the circular cylindrical lateral surface.
  • the wall is a piston opposite in the direction of movement end face of the compression volume.
  • An end wall for receiving the discharge opening allows the outflow opening permanently, regardless of the position of the compression piston of the compression device in the compression device to keep open and thus always a way to provide a relaxation of the compressed inside the compression volume electrically insulating gas enable. So it is possible, for example, that the discharge opening even when reaching the end position, d. e., the position in which maximum compression would be expected to provide an opening for the discharge of compressed electrically insulating gas from the compression volume.
  • FIGS. 1 . 2 and 3 the construction and operation of a compressed gas circuit breaker explained. It will be in the FIGS. 1 . 2 and 3
  • For each identical structural parts uses the same reference numerals and only alternative reference numerals used for different details.
  • a symmetry axis 2 divides the figures into a first and a second field.
  • the figures each show the switched-on state of a compressed-gas circuit breaker in a first field and the switched-off state of a compressed gas circuit breaker in a second field.
  • the FIG. 1 shows a section of a compressed gas circuit breaker in the cutout.
  • the compressed gas circuit breaker has an encapsulating housing 1.
  • the encapsulating housing 1 is substantially tubular and aligned coaxially with respect to an axis of symmetry 2.
  • the encapsulating housing 1 is shown as consisting of an insulating material. However, it can also be provided that the encapsulating housing 1 is designed to be electrically conductive.
  • an interrupter unit of the compressed gas circuit breaker is arranged in the interior of the encapsulating housing 1. The interrupter unit is aligned substantially coaxially to the symmetry axis 2.
  • the interrupter unit is supported directly on the encapsulating housing, wherein electrical connection points 3a, 3b are passed through the capsule housing 1 in a fluid-tight manner.
  • the encapsulating housing 1 completely encloses the interrupter unit and constitutes a gas-tight barrier.
  • the interrupter unit is spaced apart from the encapsulating housing 1 by means of an insulating arrangement and kept electrically insulated.
  • the connection points 3a, 3b are correspondingly electrically isolated by an electrical passed conductive encapsulating.
  • outdoor bushings can be used.
  • the connection points 3a, 3b penetrate the barrier of the encapsulation housing, regardless of its construction, in a fluid-tight manner.
  • a compressed gas circuit breaker with an electrically insulating encapsulating housing 1 is referred to as a live tank pressurized gas circuit breaker.
  • a compressed-gas circuit breaker with an electrically conductive encapsulating housing is referred to as a dead-tank pressurized gas circuit breaker.
  • Such a capsule housing may for example consist of a metallic material which carries ground potential.
  • the interior of the encapsulating housing 1 is filled with an electrically insulating gas.
  • the electrically insulating gas is provided with a higher pressure than the medium surrounding the encapsulating housing 1.
  • the electrically insulating gas is, for example, sulfur hexafluoride, nitrogen or another suitable gas.
  • the electrically insulating gas flows through the entire interior of the encapsulating housing 1.
  • the encapsulating housing 1 acts as a gastight barrier.
  • the enclosed in the interior of the encapsulating housing 1 insulating gas may have several bar overpressure and flooded and flows through all located within the encapsulating housing 1 assemblies. As such, it also floods the components of the interrupter unit.
  • the interrupter unit arranged in the interior of the encapsulating housing 1 is essentially assumed to be similar regardless of the type of encapsulating housing 1.
  • the interrupter unit has a first contact piece 4 and a second contact piece 5.
  • the first contact piece 4 and the second contact piece 5 are along the symmetry axis 2 relative to each other movable.
  • the first contact piece 4 is designed to be stationary in the present case, while the second contact piece 5 is displaceable along the symmetry axis 2 with respect to the encapsulation housing 1.
  • the first contact piece 4 are movable and the second contact piece 5 as a fixed contact piece or both contacts 4, 5 are designed to be movable.
  • the first contact piece 4 is designed bolt-shaped, whereas the second contact piece 5 is formed gegen Eisen bush-like.
  • the first contact piece 4 is coaxially surrounded by a first rated current contact piece 6.
  • the first rated current contact piece 6 and the first contact piece 4 are electrically conductively connected to each other, so that the first contact piece 4 and the first rated current contact piece 6 always carry the same electrical potential.
  • the second contact piece 5 is surrounded by a second rated current contact piece 7.
  • the second contact piece 5 is electrically conductively connected to the second rated current contact piece 7, so that the second rated current contact piece 7 and the second contact piece 5 always carry the same electrical potential.
  • the first rated current contact piece 6 is mounted stationary relative to the encapsulating housing 1.
  • the second contact piece 5 and the second rated current contact piece 7 are rigidly connected to each other via their electrically conductive connection, so that a relative movement of the second contact piece 5 with respect to the first contact piece 4 also has a relative movement of the second rated current contact piece 7 with respect to the first rated current contact piece 6 result.
  • the first rated current contact piece 6 is designed socket-shaped, so that in the socket-shaped recess of the first rated current contact piece 6, the second rated current contact piece 7 is retractable and contactable. It
  • the first rated current contact piece 6 is movable relative to the encapsulating housing 1 and the second rated current contact piece 7 is designed to be stationary relative to the encapsulating housing 1.
  • both the first rated current contact piece 6 and the second rated current contact piece 7 are movable relative to the encapsulating housing.
  • a selection of the mobility or location variability of the two contact pieces 4, 5 or the two rated current contact pieces 6, 7 can be made as required.
  • the contact separation speed can be increased at a turn-off or contacting speed at a power-up.
  • the first connection point 3a is contacted in an electrically conductive manner.
  • the first rated current contact piece 6 is provided with a circular cylindrical outer circumferential surface and projects into a guide sleeve 8.
  • the guide sleeve 8 is mounted stationarily to the encapsulating housing 1.
  • the second rated current contact piece 7 is displaceable along the symmetry axis 2 in the guide sleeve 8.
  • the second connection point 3b is electrically conductively connected to the guide sleeve 8.
  • the two rated current contact pieces 6, 7 serve as a nominal current path, which is designed as low impedance as possible, so that the contact resistance within the interrupter unit of the compressed gas circuit breaker is minimized.
  • the two contact pieces 4, 5 act as arcing contact pieces. In a turn-off, the rated current contact pieces 6, 7 are first separated. A current flow commutes on the still closed contact pieces 4, 5. After a separation of the contact pieces 4, 5, there may be an ignition of an arc. The arc is guided on the contact pieces 4, 5. Therefore, the two contact pieces 4, 5 are designed and configured for a high erosion resistance.
  • the second contact piece 5 with its sleeve-shaped form is provided at its end facing the first contact piece 4 with a plurality of elastically deformable contact fingers.
  • the contact fingers sit on a drive tube 9 on the front side.
  • the drive tube 9 is aligned coaxially with the axis of symmetry 2 and displaceable along the symmetry axis 2.
  • a Isolierstoffdüse 10 is arranged at the second rated current contact piece 7 .
  • the insulating material nozzle 10 is rotationally symmetrical and aligned coaxially with the axis of symmetry 2.
  • the Isolierstoffdüse 10 is connected at an angle rigid with the second rated current contact piece 7 and mitbewegbar in a movement of the second rated current contact piece 7.
  • the Isolierstoffdüse 10 surrounds the contact fingers of the second contact piece 5 and projects beyond this in the direction of the first contact piece 4.
  • the insulating material 10 has a Nozzle throat 11, which extends frontally in front of a socket opening of the second contact piece 5.
  • the nozzle throat 11 is essentially a cylindrical recess which runs coaxially to the symmetry axis 2.
  • the cross section of the nozzle throat 11 corresponds to the cross section of the first contact piece 4, wherein the cross section of the nozzle throat 11 is slightly larger than the cross section of the first contact piece 4.
  • the end of the insulating material nozzle 10 which bears from the second rated current contact piece 7 is supported at an angle with respect to a supporting sleeve 12 connected to the first rated current contact piece 6.
  • the Isolierstoffdüse 10 slides within the support sleeve 12 during the completion of a switching movement.
  • an arc zone within which an arc should preferably be performed.
  • An arc can occur both during a switch-on as well as during a switch-off process, wherein the arc should preferably burn with its base points on the two contact pieces 4, 5.
  • a premature contact of the two contact pieces 4, 5 before contacting the two rated current contact pieces 6, 7 is provided.
  • a separation of the two rated current contact pieces 6, 7 is provided before disconnecting the contact pieces 4, 5, ie, the contact pieces 4, 5 are compared to the rated current contact pieces 6, 7 configured as lagging.
  • the arc zone extends between the two contact pieces 4, 5 or around the two contact pieces 4, 5 around. In the present case, the arc zone can also be found within the nozzle throat 11 of the insulating nozzle 10.
  • the arc zone is connected via a feed channel 13 with a hot gas storage volume 14. In the present case, the feed channel 13 extends through the Isolierstoffdüse 10.
  • one or more channels pass through a wall of the insulating material nozzle 10 and open into the nozzle throat 11.
  • the hot gas storage volume 14 extends coaxially with the axis of symmetry 2 and has a substantially ring-cylindrical character.
  • the hot gas storage volume 14 extends coaxially with the axis of symmetry 2 and lies on the circumference of the second contact piece 5 and is limited by the second rated current contact piece 7.
  • the hot gas storage volume 14 is formed in the manner of a ring which is penetrated by the drive tube 9 and in turn is limited in the radial direction of the second rated current contact piece 7.
  • the hot gas storage volume 14 is also limited by the insulating material 10.
  • a partition 15 At the opposite end of the local end face is designed as a partition 15.
  • an overflow channel 16 is arranged.
  • the overflow channel 16 is realized by a plurality of bores lying in the partition wall 15, wherein the bores run parallel to the symmetry axis 2.
  • the overflow channel 16 can be closed by means of a differential-pressure-controlled valve, in particular a one-way valve 17.
  • the partition wall 15 is designed as a piston, which is displaceable within the guide sleeve 8 along the symmetry axis 2.
  • the piston limits a volume variable compression volume 18.
  • the piston receives the hot gas storage volume 14 in its interior.
  • the compression volume 18 extends from the arc zone in the direction of the axis of symmetry 2 behind the hot gas storage volume 14.
  • the compression volume 18, similar to the hot gas storage volume 14 has a hollow cylindrical shape, wherein a shell-side limitation of the compression volume 18 is given by the guide sleeve 8.
  • An inner shell-side boundary of the compression volume 18 is given by the drive tube 9.
  • the partition wall 15 and the drive tube 9 are connected to each other with angular locking.
  • the partition wall 15 forms a movable frontal boundary of the compression volume 18.
  • the compression volume 18 has a stationary end wall 19.
  • the fixed end wall 19 is rigidly connected to the guide sleeve 8.
  • the stationary end wall 19 is penetrated by the drive tube 9 and the drive tube 9 is movable relative to the stationary end wall 19.
  • a plurality of outflow openings 20a, 20b, 20c, 20d are arranged in a wall of the guide sleeve 8 .
  • the positions of the outflow openings 20a, 20b, 20c, 20d can be selected as required in the wall of the guide sleeve 8.
  • the number of outflow openings 20a, 20b, 20c, 20d is variable.
  • FIG. 1 is the location of the outflow openings 20a, 20b, 20c, 20d selected such that the first of the outflow openings 20a, 20b, 20c, 20d are dammed during a Ausschaltvorganges when the first contact piece 4, the nozzle throat 11 has just released.
  • the position of the outflow openings 20a, 20b, 20c, 20d is selected such that during a relative movement of the second rated current contact piece 7 within the guide sleeve 8, the rated current contact piece 7 or the piston / the partition wall 15 in front of the outflow openings 20a, 20b, 20c, 20d pushes.
  • the drive tube 9 is moved along the symmetry axis 2 by means of a drive device in such a way that the second contact piece 5 coupled thereto and the second rated current contact piece 7 are moved in the direction of the corresponding first contact piece 4 or the corresponding first rated current contact piece 6.
  • the first contact piece 4 dips into the nozzle throat 11 of the insulating material 10.
  • a drive movement is applied to the drive tube 9, whereby this is moved with opposite sense of direction than during a switch-on along the symmetry axis 2.
  • the two contact pieces 4, 5 remain at this time still in a galvanic contact.
  • One between the two connection points 3a, 3b flowing electric current commutes from the current path formed between the rated current contact pieces 6, 7 on the formed between the contact pieces 4, 5 current path.
  • the relative movement between the two contact pieces 4, 5 progresses.
  • An overpressure in the arc zone can be reduced, for example, by the drive tube 9 in the direction of the symmetry axis 2 by means of a hot gas flow.
  • the feed channel 13 opens into the hot gas storage volume 14, which has a constant volume. With increasing duration of burning of the turn-off arc in the arc zone More and more hot gas is pressed into the hot gas storage volume 14, so that within the hot gas storage volume 14, there is an increase in the local pressure, as over the feed channel 13 permanently hot switching gas nachdrteilt.
  • mechanically compressed insulating gas can pass into the hot gas storage volume 14 via the overflow channel 16 in the compression volume 18 and be used therefrom via the feed duct 13 for blowing out the arc.
  • the cold insulating gas acts after a first evacuation of the arc zone by the cached hot gas additionally cooling and is therefore particularly suitable to the hot arc cool, blow and finally extinguish.
  • the discharge openings 20a, 20b, 20c, 20d are gradually disregarded by the first contact piece 4 of the second rated current contact piece 7 after the suppression of the nozzle throat 11, so that at the end of the switch-off additional increase of the pressure within the compression volume 18 can take place, since a puffing of the compressed insulating gas via the outflow openings 20a, 20b, 20c, 20d is possible only to a reduced extent.
  • the overflow channel 16 the increased in its pressure electrically insulating gas can relax into the hot gas storage volume 14 inside.
  • FIG. 2 the Figures 2 and 3 now show alternative embodiments of the layers of outflow openings.
  • the function and construction of the in the Figures 2 . 3 shown pressure gas circuit breakers correspond to those in the FIG. 1 shown compressed gas circuit breaker.
  • FIG. 2 an alternative positioning of outflow openings 20e, 20f is provided.
  • the outflow openings 20e, 20f are in turn introduced into the compression volume 18 on the shell side, but the position is selected such that no damming of the outflow openings 20e, 20f occurs even in the switch-off state, ie the outflow openings 20e, 20f according to the construction FIG. 2 are permanently free from any overlap and thus permanently open.
  • FIG. 3 shows an alternative position of outflow openings 20g, 20h, which are now arranged in the stationary end wall 19 of the compression volume 18. Also the outflow openings 20g, 20h in the construction according to FIG. 3 are permanently kept free of any overlap, valve assembly or the like, so that they have the effect in the FIG. 2 Corresponding outflow openings 20e, 20f correspond.
  • discharge ports 20g, 20h cause a transgression or Verpuffen of compressed insulating gas from the compression volume 18 into the interior of the interrupter unit.
  • the overflow openings 20h, 20g provide a way out of the compression volume 18 in a region enclosed by the guide sleeve 8.
  • the electrically insulating gas exiting through the outflow openings 20g, 20h can also escape from the interrupter unit.
  • a backflow wave can arise within the interrupter unit, which can delay the escape of compressed insulating gas from the compression volume 18.

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  • Circuit Breakers (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
EP11720067.5A 2010-05-12 2011-05-03 Druckgas-leistungsschalter Revoked EP2569795B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010020979 DE102010020979A1 (de) 2010-05-12 2010-05-12 Druckgas-Leistungsschalter
PCT/EP2011/057010 WO2011141321A1 (de) 2010-05-12 2011-05-03 Druckgas-leistungsschalter

Publications (2)

Publication Number Publication Date
EP2569795A1 EP2569795A1 (de) 2013-03-20
EP2569795B1 true EP2569795B1 (de) 2015-03-18

Family

ID=44118960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11720067.5A Revoked EP2569795B1 (de) 2010-05-12 2011-05-03 Druckgas-leistungsschalter

Country Status (8)

Country Link
US (1) US9029726B2 (pt)
EP (1) EP2569795B1 (pt)
CN (1) CN102985990B (pt)
BR (1) BR112012028863A2 (pt)
DE (1) DE102010020979A1 (pt)
MX (1) MX2012013125A (pt)
RU (1) RU2562963C2 (pt)
WO (1) WO2011141321A1 (pt)

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CN104143467B (zh) * 2013-09-30 2017-07-21 国家电网公司 一种压气式灭弧装置及使用该灭弧装置的高压断路器
DE102014216171A1 (de) 2014-08-14 2016-03-03 Siemens Aktiengesellschaft Elektrische Schalteinrichtung
EP3093866B1 (en) * 2015-05-13 2020-04-22 ABB Schweiz AG An electric pole unit for medium voltage gas-insulated circuit breakers
CN105244242B (zh) * 2015-11-02 2017-09-15 上海电科电器科技有限公司 断路器及其排气结构
FR3049386B1 (fr) * 2016-03-24 2018-04-20 Schneider Electric Industries Sas Appareil electrique de coupure d'un courant electrique dans l'air comportant un dispositif de filtrage des gaz de coupure ameliore
DE102016214196B4 (de) * 2016-08-02 2019-11-21 Siemens Aktiengesellschaft Unterbrechereinheit für einen Leistungsschalter
JP6818604B2 (ja) * 2017-03-24 2021-01-20 株式会社日立製作所 ガス遮断器
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WO2019092866A1 (ja) * 2017-11-10 2019-05-16 株式会社 東芝 ガス遮断器
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DE102010020979A1 (de) 2011-11-17
RU2012153565A (ru) 2014-06-20
US20130056444A1 (en) 2013-03-07
BR112012028863A2 (pt) 2016-07-26
WO2011141321A1 (de) 2011-11-17
MX2012013125A (es) 2013-02-11
RU2562963C2 (ru) 2015-09-10
CN102985990A (zh) 2013-03-20
CN102985990B (zh) 2016-03-09
US9029726B2 (en) 2015-05-12

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