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
• • 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
  • H01H33/92—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 liquid, e.g. oil
• • 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
  • H01H2033/906—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 with pressure limitation in the compression volume, e.g. by valves or bleeder openings

Definitions

• the invention relates to a disconnecting switching device with a first contact piece and with a second contact piece, which are movable relative to each other and separable in a separation zone, and with a compression device which has a compression space for receiving a fluid.
• Such a disconnecting device is known, for example, from US Pat. No. 4,829,150.
• a separation ⁇ switching device is described with a first contact piece and a second contact piece.
• the two contact pieces are arranged movable relative to each other.
• the two known contact pieces are separable from each other in a separation zone.
• the separation switching device has a compression device, which comprises a compression space for receiving a fluid.
• One of the contact pieces penetrates the compression space of the compression device, so that compressed fluid is conducted past the contact piece into the separation zone within the compression space.
• the known compression space is formed comparatively large-voluminous. Due to the large volume of the comp ⁇ rionsraumes high driving forces for actuating the compression device necessary.
• a disconnecting device is for example a device which serves to open a current path without current. Even when a current path is opened without current, discharge phenomena may occur on relatively movable contact pieces. Such discharge phenomena are fed, for example, by residual charges on lines or busbars, so that when the contact pieces are separated from one another, arcing phenomena can occur between them. Generation of a flow of a fluid in the separation zone of the separation switching device makes it possible to blow occurring arcs and to cool or to remove impurities from the separation zone.
• Suitable fluids are, for example, electrically insulating fluids, which extend between the contact pieces or around the contact pieces
• the separation zone is the space in which contacting / separation of the relatively movable contact pieces takes place.
• the separation zone is filled with an electrically insulating fluid, so that contact pieces, which can lead Differing electrical potentials vonei ⁇ Nander are electrically isolated.
• ei ⁇ ne separation point can be arranged to separate, for example Various ⁇ ne means an electrical power transmission device from each other. For example, cables can be disconnected from circuit breakers via the disconnecting switch.
• a Kompensions worn can be used with compression space.
• the compression space can have various types Ausgestal ⁇ lines.
• the compression space can be designed, for example, as a volume-variable element, so that when the volume of the compression space is reduced, a compression chamber rim réelle takes place within one of the compression space is Schlos ⁇ Senen amount of fluid.
• Ressionsvolumen such a mechanical Comp ⁇ for example, can be designed as Kolbenzylinderanord ⁇ planning.
• the compression device can also have a volume-constant compression space in which quantities of fluid are pressed in, whereby the fluid to be absorbed in the compression volume experiences an increase in pressure.
• the available installation space can be reduced.
• the first contact piece can be provided with at least one outflow opening, which allows the compressed fluid to escape into the separation zone.
• the off ⁇ flow orifice can be a mouth opening one outlet channel, which connects the compression chamber to the discharge port.
• the contact piece for example, have at least one outflow channel, which directs the compressed fluid from the compression chamber in the region of the separation zone.
• the arrangement of the outflow opening directly on the first contact piece provides the possibility of efficiently directing the compressed fluid into the areas in which the occurrence of discharge phenomena is the most probable. Thus, it is avoided that dielectrically stable regions are unnecessarily flushed by a fluid flow. Thus, the total volume, which is to be set under pressure in the compression space, can be reduced. Ent ⁇ speaking results in a more efficient use of compressed in Comp ⁇ ressionsraum fluid.
• a plurality of outlet openings may be arranged at different positions of the first contact piece.
• an outflow opening can be arranged in the contacting region of the first contact piece.
• immediacy bar after a contact separation of the first and the second Contact piece of this detected at this time as dielectrically critical area of a fluid flow.
• a plurality of outflow openings can, for example, bring about a radial discharge of the fluid into the separation zone.
• the total volume required to blow the separation zone is reduced. Accordingly, a lower energy is required ⁇ to effect a compression of the fluid.
• the compression space projects at least partially at least partially into the separation zone.
• An at least temporary protrusion of the compression space into the separation zone makes it possible to keep the flow compressed in the compression space in the direction of the outflow opening (s) positionable on the first contact piece relatively short. If the compression space is now brought into the separation zone, the required volume can be compressed directly in the region in which it is intended to flow out. In particular, frictional losses in outflow ducts which would occur in order to bring the fluid intended for outflowing into the region of the separation zone from remote compression spaces are thus avoided. Accordingly, this measure leads to the fact that, on the one hand, the volume to be provided for outflow can be reduced.
• the compression space can be moved together with a movable contact piece.
• the volume to be compressed can be sheet of fluid redu ⁇ , since this can leak loss and communicate directly into the separation zone.
• a projection of the compression space into the separation zone during the switched-on state should be sought. Where ⁇ , however, preferably the compression chamber should be removed from the separation zone in the disconnected position of the separation switching device.
• one or both contact pieces can be moved by means of a drive device, so that an insulation gap between the contact pieces can be produced within the separation zone, ie the distance between them is increased.
• the first contact piece may be formed in the manner of a bolt, whereas the second contact piece is formed in the manner of a bush, in which the counter-shaped
• bolt-shaped first contact piece is retractable.
• the two contact pieces are each electrically contacted with further phase conductor sections, so that a current path can be interrupted via a separation point.
• a further advantageous embodiment may provide that the compression space is at least partially bounded by the first contact piece, in particular encompassed.
• the first contact piece may for example be movable out ⁇ staltet and driven by a drive means in the separation zone into moved or be ⁇ be moved from the separation zone. If one uses now this first contact piece to limit the compression space, it is possible in a simple manner, in the immediate vicinity of the separation zone or within the separation zone, a compression of a fluid to be ⁇ act.
• the first contact piece can thus serve on the one hand for a power transmission or power line, on the other hand this contact piece can represent a barrier for limiting the compression space.
• the comp ⁇ ressionsraum should be encompassed by the first contact piece.
• the compression chamber at least in sections Huaweiord ⁇ NEN within the first contact piece, so that it is dielectrically shielded by the first contact piece.
• the compression space can be moved together with the first contact piece.
• the first contact piece for example, have a cylinder recess for limiting the compression space, in which a piston can dip. Equivalently, the first contact piece, for example in the manner of a piston, can dip into a cylinder recess and delimit the compression space.
• a common movement of at least portions of the compres sion ⁇ space allows the separation zone is kept free in the separation Stel ⁇ development of the two contact pieces of a protruding Komp- ressionsraum.
• Construction has the advantage that at one point or several points of the first contact piece, a discharge port can be positioned for example at ⁇ least so that flow out of the compression space compressed fluid from the compression chamber and can flow via the outflow opening into the separation zone. So it is for example possible to provide various ⁇ dene outflow on the first contact piece to cause different flow directions or a flow of the separation zone from different directions.
• Outflow opening for compressed in the compression space fluid is arranged in a contacting region of the first contact piece.
• An outflow opening can be arranged, for example, in the contacting region of the first contact piece.
• the Kontak ⁇ t ists Siemens a contact piece is the area in which a galvanic contact with another contact piece is provided.
• a contacting region of a contact piece is, for example, the region in which the contact pieces overlap one another. This area is to be regarded as a dielectrically particularly stressed since here the contact pieces approach each other or remove from each other, wherein the contact pieces may have different electrical Po ⁇ potentials.
• an increased dielectric load can occur at the areas facing one another, in particular at contacting areas, both from the first contact piece and from the second contact piece.
• a further advantageous embodiment can provide that the first contact piece acts as a cylinder or as a piston for a piston or cylinder which is movable relative to the first contact piece.
• An embodiment of the first contact piece as a cylinder makes it possible to use a cylinder space of the first contact piece to limit the compression space.
• a piston can be toggled project into the cylinder chamber, for example, the piston being arranged relative to the first movable contact piece.
• the piston should be stationarily positioned so that the first contact piece is slidably mounted on the piston.
• the Kolbenbo ⁇ the piston together with the cylinder space of the first contact piece limit the compression space of the compression device.
• the piston should be formed as part of the current path, which can be interrupted by the separation switching device.
• a sliding contact arrangement may preferably be formed between the piston and the cylinder.
• a shaping of the first contact piece may be provided as a piston, wherein the first contact piece can dive into a cylinder chamber.
• the second clock Kon ⁇ piece has a Vorumbleabêt and a Haupt.ab ⁇ cut.
• An arrangement of the second switching contact piece with precontact section and main contact section makes it possible to guide an arc preferably in a specific section of the second switching contact piece.
• the pre-contact section contacts the first switching contact piece in time prior to contact making on the main contact section of the second switching contact piece.
• Main contact portion is formed bush-shaped, wherein the pre-contact portion is within a socket opening plat ⁇ ed axially displaceable element.
• the Vor.abites serves firstly a time precontacting, but on the other hand the Vor.abites can shield the socket opening of the two ⁇ th switching contact piece dielectric and so increase the insulation resistance of the separation zone.
• the main contact portion is first released from the first contact piece and subsequently a separation of the pre-contact portion of the first contact piece pre ⁇ taken. Accordingly, arcing occurs preferably at the pre-contact section.
• the pre-contact section and the main contact section are relatively zueinan ⁇ movable.
• the pre-contact portion may be mounted relatively displaceable to the main contact portion of the second contact piece. This provides the possibility that a spring-loaded contact between the pre-contact portion and the first Kon ⁇ tact piece and the main contact portion and the first con ⁇ tact piece can be made independently. In a turn-off operation, it is possible to commutate a turn-off current from the main contact section to the pre-contact section.
• the pre-contact section can protect the main contact ⁇ section from arc erosion.
• a further advantageous embodiment can provide that from ⁇ switching process flows out of the compression chamber in the compression chamber compressed fluid during a.
• a compression of a fluid in the compression chamber during or prior to insertion an opening operation should be done so that in the course of a Ausschaltvor ⁇ gear is maintained within the compression chamber a sufficient Vo ⁇ lumen to druckerhöhtem fluid that can flow into the separation zone through a discharge opening.
• a continuous compression of the fluid in the course of an opening operation a continuous flow of the compressed off can ⁇ fluid through the outflow opening can be forced. Accordingly, a holding of pressure-elevated fluid in the run-up to a switch-off is not necessary.
• An outflow of fluid can already begin during an onset of the switch-off process and as continuously as possible during the presence of a relative movement of the contact pieces to each other in the course of a turn-off stop. Accordingly, dirt is flushed out of the separation zone.
• the separation zone is cooled and rinsed. Thus, a deletion of switching arcs in the separation zone is supported.
• an embodiment of the invention is sche ⁇ matically shown in a drawing and described in more detail below.
• Figure shows a section through a disconnecting device.
• the disconnecting switching device has an encapsulating housing 1.
• the encapsulating housing 1 in the present case has a metallic base body. In the interior of the encapsulating housing 1, a receiving space is arranged.
• the encapsulating housing 1 provides a barrier, so that 1 is arranged in the receiving space fluid can not escape from the Kapselungsge ⁇ housing 1 in the interior of the encapsulating housing.
• the trapped in the receiving space fluid is hermetically sealed against the environment.
• the trapped in the receiving chamber fluid is electrically insulating and is beauf beat ⁇ with a pressure, so that the insulation resistance is increased.
• Suitable electrically insulating fluids are, for example, gaseous sulfur hexafluoride, gaseous carbon dioxide or gaseous nitrogen.
• the encapsulating housing 1 has a first flange feedthrough 2 and a second flange feedthrough 3.
• the two flange adapters ments 2, 3 each have a flange which is closed in a fluid-tight manner by an electrically insulating bushing insulator.
• the feedthrough insulators are each traversed by a phase conductor portion fluid-tight, which extend from the environment of the encapsulating housing 1 in the interior of the receiving space.
• a first contact piece 4 and a second contact piece 5 are arranged.
• the two contact pieces 4, 5 are movable relative to each other.
• the first contact piece 4 is bolt-shaped and mounted displaceably along a longitudinal axis 6.
• the second contact piece 5 is of bush-shaped design, with a socket opening being formed such that the first contact piece 4 can enter into the socket opening of the second contact piece 5 with its contacting area.
• the second contact piece 5 is subdivided into a main contact section 5a, which surrounds the socket opening on the outer jacket side, and a pre-contact section 5b, which is encompassed by the main contact section 5a in the socket opening of the second
• the first clock-Kon ⁇ piece 5 is associated with a first guide unit 7 wel ⁇ che serve a guiding and directing the first contact piece. 4 Furthermore, the first guide unit 7 serves for electrical contacting of the first contact piece 4 with a phase conductor section which passes through the second
• Flange bushing 3 is passed into the environment of the encapsulating housing 1.
• the second contact piece 5 has a second guide unit 8, which serves for a positioning of the second contact piece 5.
• the second guide unit 8 is also a contacting of the second contact piece 5 with a phase conductor section, which is passed through the first flange bushing 2 in the environment of the encapsulating housing 1.
• the two guide units 7, 8 are supported on the encapsulation housing 1 on the inner shell side via electrically insulating support arrangements 9a, 9b.
• the pre-contact section 5b of the second contact piece 5 is on the second guide unit 8 in the direction of the longitudinal axis 6 slidably mounted.
• the pre-contact unit 5b is spring-loaded in the direction of the first contact piece 4 in the second guide unit 8, wherein in the open state of ⁇ the disconnecting switching device of the pre-contact section 5b the socket opening of the second contact piece 5 blocks to a large extent and these dielectrics shields.
• a shield hood 10 is complementary to ⁇ arranged on the second guide unit 8 5 shields the second contact piece dielectric.
• a further shielding hood 11 is struck on the first guide unit 7, which shields the first guide unit 7 and the first contact piece 4 dielectrically.
• the shielding hoods 10, 11 are respectively penetrated by recesses, via which access to the first or second contact piece 4, 5 is possible.
• the separation zone 12 is the area in which the formation of an electrically insulating path between the first contact piece 4 and the second contact piece 5 is possible. This electrically insulating route is also referred to as a switching path.
• the separation zone 12 can be at an opening operation lead to a generation of a switching arc, for example through charged lines which are attached to the Flansch notebook entryen 2, 3 passing phase conductor portions ⁇ closed.
• the separation zone 12 is advantageously flushed with the electrically insulating fluid, wherein during a switch-off operation, a flow through the separation zone 12 should be specifically induced with outflowing fluid.
• the separation zone 12 extends Zvi ⁇ rule the mutually facing areas of the first and second contact pieces 4, 5.
• the first contact piece 4 is at least partially hollow-cylindrical design, so that the first contact piece 5 can be slidably supported on the first guide unit 7 ,
• the first guide unit 7 acts as a piston which is immersed in a movement of the first contact piece 4 in the cylinder recess of the first contact piece 4 and is moved out of this. Accordingly, the first guide unit 7 is piston-like formed, whereas the first contact piece 4 is formed like a cylinder.
• the cylinder recess of the first contact ⁇ piece 4 acts as a compression chamber 13, which has a variable volume. The compression space 13 is filled with the fluid enclosed in the interior of the encapsulating housing 1.
• discharge channels 14a, 14b, 14c are arranged.
• the outflow channels 14a, 14b, 14c are aligned radially to the longitudinal axis 6.
• the outflow channels 14a, 14b, 14c open into the compression chamber 13.
• the outflow channels 14a, 14b, 14c each have at least one outflow opening in a contacting region of the first contact piece 4.
• the first and the second contact piece 4, 5 are in galvanic contact with each other.
• the compression space 13 has its largest volume (see Fig. Above the longitudinal axis 6).
• fluid ⁇ lies substantially in front of the same static pressure as the further enclosed within the capsule housing 1 fluid.
• the first contact piece 4 away from the second contact piece 5 (cf. below the longitudinal axis 6. Fig.) Is.
• the piston-shaped first guide element 7 is moved relative to the first contact piece 4, so that the volume of the compression space 13 is reduced.
• the trapped in ⁇ ner endeavour of the compression space 13 fluid is then placed under a pressure, because the cross section of the outflow ducts 14a, 14b, 14c / the mouth openings is not sufficient to the advancing in the course of a switching movement of the first contact piece 4 reducing the volume of the compression space 13 to compensate pressure-compensated in a timely manner. Accordingly, the inside of the compression space 13th trapped fluid increases in its pressure and in particular ⁇ special continuously pressed through the discharge channels 14a, 14b, 14c to the outside. Due to the cross sections of the outflow ⁇ channels 14 a, 14 b, 14 c takes place an acceleration of the passing fluid and the compressed in the compression chamber 13 fluid flows into the separation zone 12 inside.
• first contact piece 4 Below the longitudinal axis 6, an intermediate position of the first contact piece 4 is shown, in which the first contact piece 4 is moved from its closed position to its open position, already a galvanic separation of the two contact pieces 4, 5 is done, but not yet the end position of first contact piece 4 is reached. At this time, an increased pressure is recorded in the interior of the compression space (cf., the density of the particles shown symbolically in the compression space 13 above or below the longitudinal axis 6).

Landscapes

• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Circuit Breakers (AREA)
• Arc-Extinguishing Devices That Are Switches (AREA)
• Surgical Instruments (AREA)
• Switches Operated By Changes In Physical Conditions (AREA)
• Fluid-Pressure Circuits (AREA)
• Actuator (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=50390076

Family Applications (1)

Country Status (7)

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• 2013
  • 2013-04-04 DE DE102013205945.0A patent/DE102013205945A1/de not_active Withdrawn
• 2014
  • 2014-03-24 BR BR112015024787A patent/BR112015024787A2/pt not_active IP Right Cessation
  • 2014-03-24 EP EP14713431.6A patent/EP2956952A1/de not_active Withdrawn
  • 2014-03-24 CN CN201480017421.3A patent/CN105074861A/zh active Pending
  • 2014-03-24 US US14/782,160 patent/US20160049269A1/en not_active Abandoned
  • 2014-03-24 RU RU2015147193A patent/RU2015147193A/ru not_active Application Discontinuation
  • 2014-03-24 WO PCT/EP2014/055832 patent/WO2014161737A1/de active Application Filing

Non-Patent Citations (2)

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