EP3948912A1 - Medium-voltage circuit breaker - Google Patents

Medium-voltage circuit breaker

Info

Publication number
EP3948912A1
EP3948912A1 EP20710860.6A EP20710860A EP3948912A1 EP 3948912 A1 EP3948912 A1 EP 3948912A1 EP 20710860 A EP20710860 A EP 20710860A EP 3948912 A1 EP3948912 A1 EP 3948912A1
Authority
EP
European Patent Office
Prior art keywords
contact
hollow
contacts
volume
self
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.)
Granted
Application number
EP20710860.6A
Other languages
German (de)
French (fr)
Other versions
EP3948912B1 (en
Inventor
Marvin Bendig
Paul Gregor Nikolic
Florian Pleye
Martin Schaak
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP3948912A1 publication Critical patent/EP3948912A1/en
Application granted granted Critical
Publication of EP3948912B1 publication Critical patent/EP3948912B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H33/7015—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
    • H01H33/88—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

Definitions

  • the invention relates to a medium-voltage switch-disconnector according to the preamble of claim 1.
  • the object of the invention is to provide a medium-voltage switch-disconnector that can be operated with an insulating medium as an alternative to the SF 6 , but exhibits the same arc extinguishing behavior as a conventional SF 6 -operated switch-disconnector and can basically be operated with a drive unit which is also a conventional size.
  • the object is achieved in a medium-voltage switch-disconnector with the features of claim 1.
  • the medium-voltage switch-disconnector according to the invention according to claim 1 has two contacts mounted so as to be movable relative to one another.
  • One of the contacts is designed as a hollow contact that is part of a hollow contact system.
  • an insulating nozzle is provided which surrounds at least one of the two contacts, the insulating nozzle having a self-blowing volume for receiving an insulating gas, the self-blowing volume in turn having an opening which is directed towards an arc chamber.
  • the invention is characterized in that the hollow contact comprises a contact bore for receiving a pin contact, which opens into the arc space on a first side and is connected to a compression volume on a second side, which is also part of the hollow contact system.
  • the compression volume is limited on a side facing away from the contact bore by a plunger mounted movably with respect to the hollow contact system. With an opening movement of the contacts, the stamp executes a translational movement with respect to the hollow contact system, which causes a reduction in the compression volume.
  • the combination of the features described has the effect that, by reducing the compression volume, insulating gas that is present in the compression volume flows through the contact hole into the arc chamber, this insulating gas on the one hand cooling an arc that is present there, heating it up and moving it into the self-blowing volume, which is present in the insulating material nozzle flows in.
  • this insulating gas flows back into the arc chamber and cools it so that the arc is extinguished when an alternating current crosses zero.
  • the invention reduces the mechanical energy required to generate application of a blowing pressure that is necessary to blow the arc so that the energy of the arc itself is used in combination with blowing from the compression volume to build up pressure.
  • the switch-off capacity is positively influenced by the corresponding gas flow.
  • the invention further reduces the mechanical effort that has to be expended for blowing and thus successfully extinguishing the switching arc by using the energy input of the switching arc to extinguish the arc.
  • gas from the blowing out of the compression volume, which is reduced by the plunger is built up on a contact side, thus generating an additional blowing pressure in this self-blowing volume.
  • the hollow contact system is designed to be stationary during an opening movement of the contacts and the punch is in connection with a drive system for executing the trans latory movement with respect to the hollow contact system. Since the hollow contact system has a greater mass than the pin contact engaging in the hollow contact, it is advisable to move the pin contact, since this requires less drive energy. Therefore, the hollow contact system or the hollow contact is designed as a fixed contact per se.
  • the stamp is connected to the drive; in a further preferred embodiment of the invention, the stamp and the pin contact are connected to a single drive unit via a mechanical device.
  • the hollow contact is designed as a tulip contact to be used, which has a rounding at its opening, which is suitable for receiving a likewise rounded pin contact in a self-centering manner, so that in a closed state of the switch disconnector the pin contact at least partially into the contact bore of the hollow contact engages.
  • the insulating material nozzle is arranged around the hollow contact and preferably surrounds it concentrically.
  • the self-blowing volumes are arranged with their openings very close to the edge of the hollow contact, so that in a preferred embodiment a part of the hollow contact, preferably an outer edge of the Hollow contact, in turn, forms part of the opening of the self-blowing volume.
  • Figure 1 shows a cross section through a medium voltage
  • FIG. 2 shows the same switch disconnector according to FIG. 1 with reduced compression volume and extinguished switching arc
  • FIG. 3 is a schematic representation of the extinguishers
  • FIG. 1 The contacts of a medium-voltage switch-disconnector 2 are shown schematically in FIG. For the sake of simplicity, peripheral systems and the housing of the switch disconnector 2 are not shown.
  • Figure 1 only a hollow contact system 6, which has a hollow contact 4, which is designed as a tulip contact 5, as well as a pin contact 18 and an insulating material nozzle 8 surrounding the hollow contact 5 are shown.
  • the hollow contact system 6 includes besides the hollow contact 4 and an insulating nozzle holder 28, a housing 44 into which the hollow contact 4 is introduced and which at least partially encloses a compression volume 20.
  • the hollow contact 4 has, as the name suggests, a contact bore 16 which is connected to an arc chamber on a first side and opens into the compression volume 20 on its second side, the side facing away from the arc chamber 14.
  • a punch 24 is provided, which limits the compression volume 20 on a side 22 facing away from the contact bore 16.
  • the punch 24 performs a translational movement in the direction of the arrow 26.
  • This translational movement 26 reduces the compression volume 20, which is shown by the dashed line of the punch 24 in FIG.
  • an insulating gas which is illustrated in FIG. 2 by a cold gas flow 32, is pressed through the contact bore 16 into the arc chamber 14.
  • the cold gas stream 32 splits, part of which is directed directly at the switching arc 30 and cools it in the process.
  • a partial flow 34 of the cold gas flow runs in the direction of the self-blowing volume, as a result of which there is a pressure increase in the self-blowing volume 10.
  • the pressure increase in the self-blowing volume 10 results on the one hand from the increasing amount of gas there, and on the other hand also from the increased temperature of the former cold gas flowing in there, which is already heated by the switching arc 30.
  • the energy of the switching arc 30 is thus used to heat the former cold gas 32, which increases the pressure in the
  • Self-blowing volume 10 can rise up to a critical pressure P k .
  • P k critical pressure
  • the critical pressure P k is reached in the self-blowing volume 10
  • there is a reversal of the gas flow out of the self-blowing volume which leads to an increased blowing of the switching arc 30 and is illustrated by the arrow 36 in FIG.
  • FIG. 3 a diagram is shown purely schematically which is based on experimental measured values, but which is shown here purely qualitatively.
  • the X-axis shows a blowing pressure P
  • the Y-axis shows the maximum current steepness of the alternating current that can be interrupted by the medium-voltage switch-disconnector at a blowing pressure P at zero current (di / dt crit ).
  • Curve 48 shows qualitatively the course of this interruptible current gradient when the switching arc 30 is blown through the hollow contact 4 due to the reduction in compression volume 20.
  • the use of self-blowing volumes 10 was dispensed with.
  • An even clearer increase in the breaking capacity can be seen in the qualitatively represented curve 46, which is recorded using self-blowing volumes and otherwise the same conditions as shown in FIGS. 1 and 2. This shows that the interaction of the self-blowing volumes 10 and the plunger 24, which reduces the compression volume 20 and thus blows the switching arc 30, leads to a significant increase in the breaking capacity, which is a measure of the effective extinction of the switching arc 30.
  • a drive unit is preferably provided, which is designed such that the punch 24 and the moving contact 18 are moved by a central drive unit.
  • the pin contact 18 and the stem 24 are connected via a mechanical deflection unit, also not shown, so that the translatory movement 26, which essentially also corresponds to the translatory movement of the pin contact 18, is carried out synchronously. This means that there is no need for an additional, cost-intensive drive unit that would require additional installation space.
  • By moving the Stamp 24 with the already necessary movement of the pin contact 18 can already be used drive energy to move both components synchronously.
  • the already existing drive energy is also used to blow additional insulating gas into the arc chamber 14 and to accelerate the extinguishing of the switching arc 30. Furthermore, the energy of the switching arc 30 is still used to fill the self-blowing volumes 10 to a critical pressure and a return flow from the
  • This return flow which is also referred to as hot gas flow 38, also contributes to the deletion of the switching arc 30.
  • the self-blowing volumes 10 are preferably arranged rotationally symmetrically around the hollow contact 4 in such a way that the edge of the hollow contact 4, which also forms the so-called tulip, preferably represents part of the opening 12 of the volume 10.
  • the opening 12 of the volume 10 not only the opening itself, but an opening channel were ver, which is just partially formed by the outer edge of the hollow contact 4. In this way, the opening 12 is arranged very close to the point of origin of the switching arc 30 and can thus develop its greatest effect.
  • SF 6 -free gases are used as the insulating gas, with organofluorine compounds from the series of fluoronitriles or fluoroketones being able to be used.
  • organofluorine compounds from the series of fluoronitriles or fluoroketones being able to be used.
  • less problematic and easier to handle natural gases or mixtures of these gases are preferably used.
  • clean air which is preferably produced synthetically, can be used.
  • the heat of the switching arc 30 can lead to a burn-off of the material of the insulating nozzle 8, which can occur on the surface. It can be useful to add oxygen to the insulating gas in order, for example, to bind the resulting carbon again during this burn-off.
  • 1, 2 and 3 thus represent a combination of extinguishing the switching arc 30 as promptly as possible and with little technical effort and low drive energies.
  • the measure of the compression volume 20 and the movement of the plunger 24 are used, which is supported by the self-blowing volumes 10, which are additionally filled by the plunger movement 22.
  • the mechanical effort to be applied for blowing and successfully extinguishing the switching arc 30 is reduced. This is done in that the energy input of the switching arc 30 is used to extinguish the arc, as has already been described.
  • insulating gas is supplied from the blowing in the self-blowing volume 10, blown back after reaching a critical tempera ture and thus an additional blowing pressure is built up from the self-blowing volume.

Landscapes

  • Circuit Breakers (AREA)

Abstract

The invention relates to a medium-voltage circuit breaker, comprising: - two contacts mounted so as to be movable relative to one another, a first of the contacts being a pin contact (18) and the second of the contacts being a hollow contact (4) having a contact bore (16) for accommodating the pin contact (18), - a hollow contact system (6) which comprises the hollow contact (4) and a compression volume (20), - an arcing chamber (14), - an insulating material nozzle (8) which surrounds at least one of the contacts (4, 18) and comprises a self-blast volume (10) for accommodating an insulating gas, the self-blast volume (10) having an opening (12) to the arcing chamber (14), - a plunger (24) which is movably mounted with respect to the hollow contact system (6), wherein - the contact bore (16) opens into the arcing chamber (14) on a first side (17) and is connected to the compression volume (20) on a second side (19), - the compression volume (20) is delimited by the plunger (24) on a side (22) facing away from the contact bore (16), - the plunger (24) performs a translational movement (26) with respect to the hollow contact system (6) during an opening movement of the contacts (4, 18) and causes the compression volume (20) to reduce.

Description

Beschreibung description
Mittelspannungs-Lasttrennschalter Medium voltage switch-disconnectors
Die Erfindung betrifft einen Mittelspannungs-Lasttrenn- schalter nach dem Oberbegriff des Patentanspruchs 1. The invention relates to a medium-voltage switch-disconnector according to the preamble of claim 1.
Zur Substitution des Isoliergases Schwefelhexafluorid (SF6) , das wegen seines hohen Treibhauspotenzials durch Alternativen ersetzt werden soll, werden verschiedene elektrisch isolie rende Gase bzw. Flüssigkeiten untersucht. Insbesondere werden im Stand der Technik fluororganische Verbindungen beschrie ben, unter denen insbesondere die Fluorketone und die Fluor nitrile hervorgehoben werden. Aufgrund einer möglichen Toxi zität von Fluornitrilen und aufgrund eines ungünstigen Aggre gatszustandes der Fluorketone bei Betriebsbedingungen von Isoliergasen in Stromunterbrechern, werden jedoch auch Luft, synthetische Luft oder Mischungen aus natürlichen Gasen wie Kohlenstoffdioxid, Stickstoff oder Sauerstoff eingehend un tersucht. Zum derzeitigen Stand haben die beschriebenen Al ternativgase zwar ihre grundsätzliche Eignungsfähigkeit als Ersatz für das sehr gut isolierende Schwefelhexafluorid unter Beweis gestellt, dennoch bieten sie letztlich nicht in ihrer Gesamtheit die positiven, insbesondere elektrisch isolieren den Eigenschaften des Schwefelhexafluorids. Aus diesem Grund bedarf es in einigen Anwendungen von Stromunterbrechern auch konstruktiver Änderungen im System, um dasselbe Isolierver halten bzw. auch dasselbe Lichtbogenlöschverhalten zu erzie len wie das mit einem Stromunterbrecher mit einer SF6- Isolierung der Fall ist. To replace the insulating gas sulfur hexafluoride (SF 6) , which should be replaced by alternatives due to its high global warming potential, various electrically insulating gases and liquids are being investigated. In particular, organofluorine compounds are described in the prior art, among which, in particular, the fluoroketones and the fluoronitriles are emphasized. However, due to the possible toxicity of fluoronitriles and an unfavorable aggregate state of the fluoroketones under operating conditions of insulating gases in circuit breakers, air, synthetic air or mixtures of natural gases such as carbon dioxide, nitrogen or oxygen are also examined in detail. At the current state, the alternative gases described have indeed proven their fundamental suitability as a substitute for the very good insulating sulfur hexafluoride, but ultimately they do not offer the positive, in particular electrically insulating properties of sulfur hexafluoride in their entirety. For this reason, some circuit breaker applications also require design changes in the system in order to keep the same Isolierver or the same arc extinguishing behavior as is the case with a circuit breaker with SF 6 insulation.
Die Aufgabe der Erfindung besteht darin, einen Mittelspan- nungs-Lasttrennschalter bereitzustellen, der mit einem zum SF6 alternativen Isoliermedium betreibbar ist, jedoch das gleiche Lichtbogenlöschverhalten an den Tag legt, wie ein herkömmlicher SF6-betriebener Lasttrennschalter und dabei grundsätzlich mit einem Antriebsaggregat betreibbar ist, das ebenfalls einer herkömmlichen Größe entspricht. Die Lösung der Aufgabe besteht in einem Mittelspannungs- Lasttrennschalter mit den Merkmalen des Patentanspruchs 1. The object of the invention is to provide a medium-voltage switch-disconnector that can be operated with an insulating medium as an alternative to the SF 6 , but exhibits the same arc extinguishing behavior as a conventional SF 6 -operated switch-disconnector and can basically be operated with a drive unit which is also a conventional size. The object is achieved in a medium-voltage switch-disconnector with the features of claim 1.
Der erfindungsgemäße Mittelspannungs-Lasttrennschalter gemäß Patentanspruch 1 weist zwei zueinander beweglich gelagerte Kontakte auf. Einer der Kontakte ist dabei als Hohlkontakt ausgestaltet, der Teil eines Hohlkontaktsystems ist. Ferner ist eine Isolierstoffdüse vorgesehen, die mindestens einen der beiden Kontakte umgibt, wobei die Isolierstoffdüse ein Selbstblasvolumen zur Aufnahme eines Isoliergases aufweist, wobei das Selbstblasvolumen wiederum eine Öffnung aufweist, die zu einem Lichtbogenraum hin gerichtet ist. Die Erfindung zeichnet sich dadurch aus, dass der Hohlkontakt eine Kontakt bohrung zur Aufnahme eines Stiftkontaktes umfasst, die an ei ner ersten Seite in den Lichtbogenraum mündet und an einer zweiten Seite mit einem Kompressionsvolumen in Verbindung steht, das ebenfalls Bestandteil des Hohlkontaktsystems ist. Das Kompressionsvolumen ist an einer der Kontaktbohrung abge wandten Seite von einem bezüglich des Hohlkontaktsystems be weglich gelagerten Stempel begrenzt. Der Stempel vollzieht bei einer Öffnungsbewegung der Kontakte eine translatorische Bewegung bezüglich des Hohlkontaktsystems , was eine Verklei nerung des Kompressionsvolumens bewirkt. The medium-voltage switch-disconnector according to the invention according to claim 1 has two contacts mounted so as to be movable relative to one another. One of the contacts is designed as a hollow contact that is part of a hollow contact system. Furthermore, an insulating nozzle is provided which surrounds at least one of the two contacts, the insulating nozzle having a self-blowing volume for receiving an insulating gas, the self-blowing volume in turn having an opening which is directed towards an arc chamber. The invention is characterized in that the hollow contact comprises a contact bore for receiving a pin contact, which opens into the arc space on a first side and is connected to a compression volume on a second side, which is also part of the hollow contact system. The compression volume is limited on a side facing away from the contact bore by a plunger mounted movably with respect to the hollow contact system. With an opening movement of the contacts, the stamp executes a translational movement with respect to the hollow contact system, which causes a reduction in the compression volume.
Die Kombination der beschriebenen Merkmale bewirkt, dass durch die Verkleinerung des Kompressionsvolumens Isoliergas, das in dem Kompressionsvolumen vorhanden ist, durch die Kon taktbohrung in den Lichtbogenraum strömt, wobei dieses Iso liergas einerseits einen dort vorhandenen Lichtbogen kühlt, sich dabei erhitzt und in das Selbstblasvolumen, das in der Isolierstoffdüse vorhanden ist, einfließt. Ab Erreichen eines kritischen Drucks und einer kritischen Temperatur sowohl im Lichtbogenraum als auch in dem Selbstblasvolumen strömt die ses Isoliergas zurück in den Lichtbogenraum und kühlt diesen, sodass es beim darauffolgenden Nulldurchgang eines Wechsel stroms zu einem Erlöschen des Lichtbogens kommt. Die Erfin dung reduziert die notwendige mechanische Energie zur Auf- bringung eines Beblasungsdrucks, der notwendig ist, um den Lichtbogen zu beblasen, sodass die Energie des Lichtbogens selbst in Kombination mit einer Beblasung aus dem Kompressi onsvolumen zum Druckaufbau genutzt wird. Durch die Positio nierung des Selbstblasvolumens in der Isolierstoffdüse wird dabei durch die entsprechende Gasströmung die Ausschaltleis- tung positiv beeinflusst. Die Erfindung reduziert im Weiteren den zur Beblasung und damit zur erfolgreichen Löschung des Schaltlichtbogens aufzubringenden mechanischen Aufwand dadurch, dass der Energieeintrag des Schaltlichtbogens zur Lichtbogenlöschung eingesetzt wird. Gleichzeitig wird im Selbstblasvolumen Gas aus der Beblasung aus dem Kompressions volumen, das durch den Stempel reduziert wird, auf einer Kon taktseite aufgestaut und so ein zusätzlicher Beblasungsdruck in diesem Selbstblasvolumen erzeugt. The combination of the features described has the effect that, by reducing the compression volume, insulating gas that is present in the compression volume flows through the contact hole into the arc chamber, this insulating gas on the one hand cooling an arc that is present there, heating it up and moving it into the self-blowing volume, which is present in the insulating material nozzle flows in. When a critical pressure and a critical temperature are reached both in the arc chamber and in the self-blowing volume, this insulating gas flows back into the arc chamber and cools it so that the arc is extinguished when an alternating current crosses zero. The invention reduces the mechanical energy required to generate application of a blowing pressure that is necessary to blow the arc so that the energy of the arc itself is used in combination with blowing from the compression volume to build up pressure. By positioning the self-blowing volume in the insulating nozzle, the switch-off capacity is positively influenced by the corresponding gas flow. The invention further reduces the mechanical effort that has to be expended for blowing and thus successfully extinguishing the switching arc by using the energy input of the switching arc to extinguish the arc. At the same time, in the self-blowing volume, gas from the blowing out of the compression volume, which is reduced by the plunger, is built up on a contact side, thus generating an additional blowing pressure in this self-blowing volume.
In einer Ausführungsform der Erfindung ist das Hohlkontakt system bei einer Öffnungsbewegung der Kontakte stationär aus gestaltet und der Stempel ist dabei zur Ausführung der trans latorischen Bewegung gegenüber des Hohlkontaktsystems mit ei nem Antriebssystem in Verbindung. Da das Hohlkontaktsystem eine größere Masse aufweist als der in den Hohlkontakt ein greifende Stiftkontakt ist es zweckmäßig, den Stiftkontakt zu bewegen, da dies weniger Antriebsenergie erfordert. Daher ist das Hohlkontaktsystem bzw. der Hohlkontakt an sich als Fest kontakt ausgestaltet. Der Stempel ist dabei mit dem Antrieb verbunden, in einer weiteren bevorzugten Ausgestaltungsform der Erfindung stehen der Stempel und der Stiftkontakt über eine mechanische Vorrichtung mit einem einzigen Antriebsag gregat in Verbindung. In one embodiment of the invention, the hollow contact system is designed to be stationary during an opening movement of the contacts and the punch is in connection with a drive system for executing the trans latory movement with respect to the hollow contact system. Since the hollow contact system has a greater mass than the pin contact engaging in the hollow contact, it is advisable to move the pin contact, since this requires less drive energy. Therefore, the hollow contact system or the hollow contact is designed as a fixed contact per se. The stamp is connected to the drive; in a further preferred embodiment of the invention, the stamp and the pin contact are connected to a single drive unit via a mechanical device.
Der Hohlkontakt ist in bevorzugter Ausgestaltungsform als an zuwendender Tulpenkontakt ausgestaltet, der an seiner Öffnung eine Abrundung aufweist, was dazu geeignet ist, einen eben falls abgerundeten Stiftkontakt selbstzentrierend aufzuneh men, sodass in einem geschlossenen Zustand des Lasttrenn schalters der Stiftkontakt zumindest teilweise in die Kon taktbohrung des Hohlkontaktes eingreift. In einer weiteren bevorzugten Ausgestaltungsform der Erfin dung ist die Isolierstoffdüse um den Hohlkontakt herum ange ordnet und umgibt diesen dabei bevorzugt konzentrisch. Die Selbstblasvolumina (grundsätzlich ist ein Selbstblasvolumen ausreichend, in der Regel sind jedoch mehrere Selbstblasvolu mina von Vorteil) sind mit ihren Öffnungen dabei sehr nahe am Rand des Hohlkontaktes angeordnet, sodass in einer bevorzug ten Ausgestaltungsform ein Teilbereich des Hohlkontaktes, be vorzugt ein äußerer Rand des Hohlkontaktes, wiederum einen Teil der Öffnung des Selbstblasvolumens bildet. In a preferred embodiment, the hollow contact is designed as a tulip contact to be used, which has a rounding at its opening, which is suitable for receiving a likewise rounded pin contact in a self-centering manner, so that in a closed state of the switch disconnector the pin contact at least partially into the contact bore of the hollow contact engages. In a further preferred embodiment of the invention, the insulating material nozzle is arranged around the hollow contact and preferably surrounds it concentrically. The self-blowing volumes (one self-blowing volume is generally sufficient, but several self-blowing volumes are generally advantageous) are arranged with their openings very close to the edge of the hollow contact, so that in a preferred embodiment a part of the hollow contact, preferably an outer edge of the Hollow contact, in turn, forms part of the opening of the self-blowing volume.
Weitere Ausgestaltungsformen der Erfindung und weitere Merk male werden anhand der folgenden Figuren näher erläutert. Da bei handelt es sich um rein schematische und exemplarische Darstellungen, die keine Einschränkung des Schutzbereichs darstellen. Dabei zeigen: Further embodiments of the invention and further features are explained in more detail with reference to the following figures. These are purely schematic and exemplary representations that do not restrict the scope of protection. Show:
Figur 1 einen Querschnitt durch einen Mittelspannungs-Figure 1 shows a cross section through a medium voltage
Lasttrennschalter mit Kompressionsvolumen im Hohlkontaktsystem und Selbstblasvolumen während des Auftretens eines Schaltlichtbogens , Switch-disconnector with compression volume in the hollow contact system and self-blowing volume during the occurrence of a switching arc,
Figur 2 der gleiche Lasttrennschaler gemäß Figur 1 mit verringertem Kompressionsvolumen und gelöschtem Schaltlichtbogen, und FIG. 2 shows the same switch disconnector according to FIG. 1 with reduced compression volume and extinguished switching arc, and
Figur 3 eine schematische Darstellung der Löscheigen FIG. 3 is a schematic representation of the extinguishers
schaften in Abhängigkeit des Druckes. properties depending on the pressure.
In Figur 1 sind schematisch die Kontakte eines Mittelspan- nungs-Lasttrennschalters 2 dargestellt. Der Einfachheit hal ber wird auf die Darstellung von Peripheriesysteme sowie das Gehäuse des Lasttrennschalters 2 verzichtet. In Figur 1 sind lediglich ein Hohlkontaktsystem 6, das einen Hohlkontakt 4, der als Tulpenkontakt 5 ausgestaltet ist, sowie ein Stiftkon takt 18 und eine den Hohlkontakt 5 umgebenden Isolierstoffdü se 8 dargestellt. Das Hohlkontaktsystem 6 umfasst dabei neben dem Hohlkontakt 4 und eine Isolierstoffdüsenhalterung 28 ein Gehäuse 44, in das der Hohlkontakt 4 eingebracht ist und das zumindest teilweise ein Kompressionsvolumen 20 umschließt.The contacts of a medium-voltage switch-disconnector 2 are shown schematically in FIG. For the sake of simplicity, peripheral systems and the housing of the switch disconnector 2 are not shown. In Figure 1, only a hollow contact system 6, which has a hollow contact 4, which is designed as a tulip contact 5, as well as a pin contact 18 and an insulating material nozzle 8 surrounding the hollow contact 5 are shown. The hollow contact system 6 includes besides the hollow contact 4 and an insulating nozzle holder 28, a housing 44 into which the hollow contact 4 is introduced and which at least partially encloses a compression volume 20.
Der Hohlkontakt 4 weist dabei, wie dies bereits der Name sagt, eine Kontaktbohrung 16 auf, die an einer ersten Seite mit einem Lichtbogenraum in Verbindung steht und an ihrer zweiten Seite, dem Lichtbogenraum 14 abgewandten Seite in das Kompressionsvolumen 20 mündet. The hollow contact 4 has, as the name suggests, a contact bore 16 which is connected to an arc chamber on a first side and opens into the compression volume 20 on its second side, the side facing away from the arc chamber 14.
Ferner ist ein Stempel 24 vorgesehen, der das Kompressionsvo lumen 20 an einer der Kontaktbohrung 16 abgewandten Seite 22 begrenzt. Der Stempel 24 vollzieht bei einer Öffnungsbewegung der Kontakte 4, 18 eine translatorische Bewegung in Richtung des Pfeiles 26. Durch diese translatorische Bewegung 26 wird das Kompressionsvolumen 20 verringert, was durch die gestri chelte Andeutung des Stempels 24 in Figur 2 dargestellt ist. Durch die Bewegung des Stempels 24 und die Verringerung des Kompressionsvolumens 20 wird ein Isoliergas, das in Figur 2 durch einen Kaltgasstrom 32 veranschaulicht ist, durch die Kontaktbohrung 16 in den Lichtbogenraum 14 gepresst. Dort spaltet sich der Kaltgasstrom 32 auf, ein Teil davon ist di rekt auf den Schaltlichtbogen 30 gerichtet und kühlt diesen dabei. Ein Teilstrom 34 des Kaltgasstromes verläuft dabei je doch in Richtung des Selbstblasvolumens, wodurch es in dem Selbstblasvolumen 10 zu einem Druckanstieg kommt. Der Druck anstieg im Selbstblasvolumen 10 resultiert zum einen aus der dort ansteigenden Gasmenge, und zum anderen auch durch die erhöhte Temperatur des dort einströmenden ehemaligen Kaltga ses, das bereits durch den Schaltlichtbogen 30 erwärmt ist. Die Energie des Schaltlichtbogens 30 wird somit zur Erwärmung des ehemaligen Kaltgases 32 verwandt, was den Druck im Furthermore, a punch 24 is provided, which limits the compression volume 20 on a side 22 facing away from the contact bore 16. When the contacts 4, 18 open, the punch 24 performs a translational movement in the direction of the arrow 26. This translational movement 26 reduces the compression volume 20, which is shown by the dashed line of the punch 24 in FIG. As a result of the movement of the plunger 24 and the reduction in the compression volume 20, an insulating gas, which is illustrated in FIG. 2 by a cold gas flow 32, is pressed through the contact bore 16 into the arc chamber 14. There the cold gas stream 32 splits, part of which is directed directly at the switching arc 30 and cools it in the process. A partial flow 34 of the cold gas flow, however, runs in the direction of the self-blowing volume, as a result of which there is a pressure increase in the self-blowing volume 10. The pressure increase in the self-blowing volume 10 results on the one hand from the increasing amount of gas there, and on the other hand also from the increased temperature of the former cold gas flowing in there, which is already heated by the switching arc 30. The energy of the switching arc 30 is thus used to heat the former cold gas 32, which increases the pressure in the
Selbstblasvolumen 10 bis zu einem kritischen Druck Pk anstei- gen lässt. Bei Erreichen des kritischen Druckes Pk im Selbst blasvolumen 10 kommt es zu einer Umkehr des Gasstromes aus dem Selbstblasvolumen heraus, was zu einer verstärkten Bebla sung des Schaltlichtbogens 30 führt und durch den Pfeil 36 in Figur 2 veranschaulicht ist. In Figur 3 ist rein schematisch ein Diagramm dargestellt, das auf experimentellen Messwerten beruht, das hier jedoch rein qualitativ dargestellt ist. Auf der X-Achse ist dabei ein Be blasungsdruck P angegeben, auf der Y-Achse ist die durch den Mittelspannungslasttrennschalter bei einem Beblasungsdruck P unterbrechbare maximale Stromsteilheit des Wechselstroms im Stromnulldurchgang (di/dtkrit) dargestellt. Diese ist ein Maß für die Schaltleistung des Mittelspannungslasttrennschalters. Ein höherer Wert bedeutet eine höhere Ausschaltleistung . Die Kurve 48 zeigt qualitativ den Verlauf dieser unterbrechbaren Stromsteilheit bei einer Beblasung des Schaltlichtbogens 30 durch den Hohlkontakt 4 aufgrund der Verkleinerung des Kom pressionsvolumens 20. Bei der Aufnahme dieser Kurve 48 wurde auf die Anwendung von Selbstblasvolumina 10 verzichtet. Es ist ein kontinuierlicher Anstieg der Ausschaltleistung mit steigendem Beblasungsdruck P zu verzeichnen. Ein noch deutli cherer Anstieg der Ausschaltleistung ist jedoch in der quali tativ dargestellten Kurve 46 zu verzeichnen, die unter Ver wendung von Selbstblasvolumina und ansonsten gleichen Bedin gungen, wie in Figur 1 und 2 dargestellt, aufgenommen ist. Dies zeigt, dass das Zusammenwirken der Selbstblasvolumina 10 und des Stempels 24, der das Kompressionsvolumen 20 reduziert und somit das Beblasen des Schaltlichtbogens 30 vornimmt, zu einer signifikanten Steigerung der Ausschaltleistung führt, was ein Maß für die effektive Löschung des Schaltlichtbogens 30 darstellt. Self-blowing volume 10 can rise up to a critical pressure P k . When the critical pressure P k is reached in the self-blowing volume 10, there is a reversal of the gas flow out of the self-blowing volume, which leads to an increased blowing of the switching arc 30 and is illustrated by the arrow 36 in FIG. In FIG. 3, a diagram is shown purely schematically which is based on experimental measured values, but which is shown here purely qualitatively. The X-axis shows a blowing pressure P, while the Y-axis shows the maximum current steepness of the alternating current that can be interrupted by the medium-voltage switch-disconnector at a blowing pressure P at zero current (di / dt crit ). This is a measure of the switching capacity of the medium-voltage switch-disconnector. A higher value means a higher breaking capacity. Curve 48 shows qualitatively the course of this interruptible current gradient when the switching arc 30 is blown through the hollow contact 4 due to the reduction in compression volume 20. When recording this curve 48, the use of self-blowing volumes 10 was dispensed with. There is a continuous increase in the breaking capacity with increasing blowing pressure P. An even clearer increase in the breaking capacity can be seen in the qualitatively represented curve 46, which is recorded using self-blowing volumes and otherwise the same conditions as shown in FIGS. 1 and 2. This shows that the interaction of the self-blowing volumes 10 and the plunger 24, which reduces the compression volume 20 and thus blows the switching arc 30, leads to a significant increase in the breaking capacity, which is a measure of the effective extinction of the switching arc 30.
Bevorzugt ist eine in den Figuren nicht dargestellte An triebseinheit vorgesehen, die so ausgestaltet ist, dass der Stempel 24 und der Bewegkontakt 18 durch eine zentrale An triebseinheit bewegt wird. Der Stiftkontakt 18 und der Stem pel 24 stehen dabei über eine ebenfalls nicht dargestellte mechanische Umlenkeinheit in Verbindung, sodass die transla torische Bewegung 26, die im Wesentlichen auch der translato rischen Bewegung des Stiftkontaktes 18 entspricht, synchron ausgeführt wird. Somit kann auf eine zusätzliche kosteninten sive Antriebseinheit, die zusätzlichen Bauraum benötigen wür de, verzichtet werden. Durch die gleichzeitige Bewegung des Stempels 24 mit der ohnehin notwendigen Bewegung des Stift kontaktes 18 kann dabei bereits vorhandene Antriebsenergie genutzt werden, um beide Bauteile synchron zu bewegen. A drive unit, not shown in the figures, is preferably provided, which is designed such that the punch 24 and the moving contact 18 are moved by a central drive unit. The pin contact 18 and the stem 24 are connected via a mechanical deflection unit, also not shown, so that the translatory movement 26, which essentially also corresponds to the translatory movement of the pin contact 18, is carried out synchronously. This means that there is no need for an additional, cost-intensive drive unit that would require additional installation space. By moving the Stamp 24 with the already necessary movement of the pin contact 18 can already be used drive energy to move both components synchronously.
Dadurch wird die bereits vorhandene Antriebsenergie auch dazu genutzt, zusätzliches Isoliergas in den Lichtbogenraum 14 zu blasen und das Löschen des Schaltlichtbogens 30 zu beschleu nigen. Ferner wird die Energie des Schaltlichtbogens 30 noch weiter genutzt, um die Selbstblasvolumina 10 bis zu einem kritischen Druck zu füllen und einen Rückstrom aus dem As a result, the already existing drive energy is also used to blow additional insulating gas into the arc chamber 14 and to accelerate the extinguishing of the switching arc 30. Furthermore, the energy of the switching arc 30 is still used to fill the self-blowing volumes 10 to a critical pressure and a return flow from the
Selbstblasvolumina 10 zu bewirken. Dieser Rückstrom, der auch als Heißgasstrom 38 bezeichnet wird, trägt zusätzlich zum Lö schen des Schaltlichtbogens 30 bei. To effect self-blowing volumes 10. This return flow, which is also referred to as hot gas flow 38, also contributes to the deletion of the switching arc 30.
Die Selbstblasvolumina 10 sind bevorzugt rotationssymmetrisch um den Hohlkontakt 4 in der Art angeordnet, so dass der Rand des Hohlkontaktes 4, der auch die sogenannte Tulpe bildet, bevorzugt einen Teil der Öffnung 12 des Volumens 10 dar stellt. Hierbei wird unter der Öffnung 12 des Volumens 10 nicht nur die Öffnung an sich, sondern ein Öffnungskanal ver standen, der eben teilweise von der äußeren Berandung des Hohlkontaktes 4 gebildet wird. Auf diese Weise ist die Öff nung 12 sehr nah am Entstehungsort des Schaltlichtbogens 30 angeordnet und kann damit ihre stärkste Wirkung entfalten. The self-blowing volumes 10 are preferably arranged rotationally symmetrically around the hollow contact 4 in such a way that the edge of the hollow contact 4, which also forms the so-called tulip, preferably represents part of the opening 12 of the volume 10. Here, under the opening 12 of the volume 10 not only the opening itself, but an opening channel were ver, which is just partially formed by the outer edge of the hollow contact 4. In this way, the opening 12 is arranged very close to the point of origin of the switching arc 30 and can thus develop its greatest effect.
Als Isoliergas werden hierbei insbesondere SF6-freie Gase verwendet, wobei fluororganische Verbindungen aus den Reihen der Fluornitrile oder Fluorketone zum Einsatz kommen können. Bevorzugt werden jedoch weniger problematische und leichter handzuhabende natürliche Gase bzw. Mischungen aus diesen Ga sen verwendet. Hierbei kann zum Beispiel gereinigte Luft (Clean Air) , die bevorzugt synthetisch hergestellt wird, ver wendet werden. Je nach Verwendung des Materials der Isolier stoffdüse 8 kann es durch die Wärme des Schaltlichtbogens 30 zu einem Abbrand des Materials der Isolierstoffdüse 8 kommen, der oberflächlich von Statten gehen kann. Hierbei kann es zweckmäßig sein, dem Isoliergas Sauerstoff beizumischen, um beispielsweise entstehenden Kohlenstoff bei diesem Abbrand erneut zu binden. Die in den Figuren 1, 2, bzw. 3 beschriebenen Maßnahmen stel len somit eine Kombination dar, den Schaltlichtbogen 30 mög lichst zeitnah und mit geringem technischem Aufwand und ge- ringen Antriebsenergien zu löschen. Dabei wird einerseits auf die Maßnahme des Kompressionsvolumens 20 und die Bewegung des Stempels 24 gesetzt, was durch die Selbstblasvolumina 10, die durch die Stempelbewegung 22 zusätzlich gefüllt werden, un terstützt wird. Somit wird der zur Beblasung und erfolgrei- chen Löschung des Schaltlichtbogens 30 aufzubringende mecha nische Aufwand reduziert. Dies geschieht dadurch, dass der Energieeintrag des Schaltlichtbogens 30 zur Lichtbogenlö schung eingesetzt wird, wie bereits beschrieben ist. Gleich zeitig wird in dem Selbstblasvolumen 10 Isoliergas aus der Beblasung zugeführt, nach Erreichen einer kritischen Tempera tur zurückgeblasen und so ein zusätzlicher Beblasungsdruck aus den Selbstblasvolumina aufgebaut. In particular, SF 6 -free gases are used as the insulating gas, with organofluorine compounds from the series of fluoronitriles or fluoroketones being able to be used. However, less problematic and easier to handle natural gases or mixtures of these gases are preferably used. Here, for example, clean air, which is preferably produced synthetically, can be used. Depending on the use of the material of the insulating nozzle 8, the heat of the switching arc 30 can lead to a burn-off of the material of the insulating nozzle 8, which can occur on the surface. It can be useful to add oxygen to the insulating gas in order, for example, to bind the resulting carbon again during this burn-off. The measures described in FIGS. 1, 2 and 3 thus represent a combination of extinguishing the switching arc 30 as promptly as possible and with little technical effort and low drive energies. On the one hand, the measure of the compression volume 20 and the movement of the plunger 24 are used, which is supported by the self-blowing volumes 10, which are additionally filled by the plunger movement 22. Thus, the mechanical effort to be applied for blowing and successfully extinguishing the switching arc 30 is reduced. This is done in that the energy input of the switching arc 30 is used to extinguish the arc, as has already been described. At the same time insulating gas is supplied from the blowing in the self-blowing volume 10, blown back after reaching a critical tempera ture and thus an additional blowing pressure is built up from the self-blowing volume.
Bezugszeichenliste List of reference symbols
2 Lasttrennschalter 2 switch disconnectors
4 Hohlkontakt 4 hollow contact
5 Tulpenkontakt 5 tulip contact
6 Hohlkontaktsystem 6 hollow contact system
8 Isolierstoffdüse 8 insulating nozzle
10 Selbstblasvolumen 10 self-blowing volume
12 Öffnung Volumen 12 opening volume
14 Lichtbogenraum 14 arc room
16 Kontaktbohrung 16 contact hole
17 erste Seite Kontaktbohrung 17 first page contact hole
18 Stiftkontakt 18 pin contact
19 zweite Seite Kontaktbohrung 19 second side contact hole
20 Kompressionsvolumen 20 compression volume
22 Seite Kontaktbohrung abgerundet 22 Side contact hole rounded
24 Stempel 24 stamps
26 translatorische Bewegung 26 translational movement
28 Isolierstoffdüsenhalter 28 insulating nozzle holder
30 Lichtbogen 30 arcs
32 Kaltgasstrom 32 cold gas flow
34 Kaltgasstrom im Selbstblasvolumen 34 Cold gas flow in the self-blowing volume
36 Selbstblasstrom 36 self-blowing stream
38 Heißgasstrom 38 hot gas flow
40 Festkontakt 40 Fixed contact
42 Bewegkontakt 42 Moving contact
44 Gehäuse Hohlkontaktsystem 44 Housing hollow contact system
46 Verlauf mit Selbstblasvolumen 46 Course with self-blowing volume
48 Verlauf ohne Selbstblasvolumen 48 Course without self-blowing volume

Claims

Patentansprüche Claims
1. Mittelspannungs-Lasttrennschalter mit 1. Medium voltage switch-disconnector with
- zwei zueinander beweglich gelagerten Kontakten, wobei ein erster der Kontakte ein Stiftkontakt (18) ist und der zweite der Kontakte ein Hohlkontakt (4) mit einer Kontaktbohrung (16) zur Aufnahme des Stiftkontakts (18) ist, - two mutually movably mounted contacts, a first of the contacts being a pin contact (18) and the second of the contacts being a hollow contact (4) with a contact hole (16) for receiving the pin contact (18),
- einem Hohlkontaktsystem (6), das den Hohlkontakt (4) und ein Kompressionsvolumen (20) umfasst, - A hollow contact system (6) which comprises the hollow contact (4) and a compression volume (20),
- einem Lichtbogenraum (14), - an arc chamber (14),
- einer Isolierstoffdüse (8), die mindestens einen der Kon takte (4, 18) umgibt und ein Selbstblasvolumen (10) zur Auf nahme eines Isoliergases umfasst, wobei das Selbstblasvolumen (10) eine Öffnung (12) zum Lichtbogenraum (14) aufweist, - An insulating material nozzle (8) which surrounds at least one of the contacts (4, 18) and comprises a self-blowing volume (10) for receiving an insulating gas, the self-blowing volume (10) having an opening (12) to the arc chamber (14),
- einem Stempel (24), der zum Hohlkontaktsystem (6) beweglich gelagert ist, - A punch (24) which is movably mounted to the hollow contact system (6),
wobei in which
- die Kontaktbohrung (16) an einer ersten Seite (17) in den Lichtbogenraum (14) mündet und an einer zweiten Seite (19) mit dem Kompressionsvolumen (20) in Verbindung steht, - the contact bore (16) opens into the arc chamber (14) on a first side (17) and is connected to the compression volume (20) on a second side (19),
- das Kompressionsvolumen (20) an einer von der Kontaktboh rung (16) abgewandten Seite (22) vom Stempel (24) begrenzt ist, - The compression volume (20) on a side (22) facing away from the Kontaktboh tion (16) is limited by the punch (24),
- der Stempel (24) bei einer Öffnungsbewegung der Kontakte (4, 18) eine translatorische Bewegung (26) bezüglich des Hohlkontaktsystems (6) vollzieht und eine Verkleinerung des Kompressionsvolumens (20) bewirkt. - When the contacts (4, 18) open, the plunger (24) executes a translatory movement (26) with respect to the hollow contact system (6) and causes the compression volume (20) to be reduced.
2. Mittelspannung-Lasttrennschalter nach Anspruch 1, dadurch gekennzeichnet, dass das Hohlkontaktsystem (6) bei einer Öff nungsbewegung stationär ausgestaltet ist und der Stempel (24) zur Ausführung der translatorischen Bewegung (26) gegenüber des Hohlkontaktsystems (6) mit einem Antriebssystem in Ver bindung steht. 2. Medium-voltage switch disconnector according to claim 1, characterized in that the hollow contact system (6) is designed to be stationary with a Publ movement movement and the punch (24) for performing the translational movement (26) with respect to the hollow contact system (6) with a drive system in Ver commitment.
3. Mittelspannung-Lasttrennschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Hohlkontakt (4) als Tulpen kontakt (5) ausgestaltet ist. 3. Medium-voltage switch disconnector according to claim 1 or 2, characterized in that the hollow contact (4) is designed as a tulip contact (5).
4. Mittelspannung-Lasttrennschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass ein Bewegkontakt (42) als Stiftkontakt (18) ausgebildet ist und in einem geschlos- senen Zustand des Lasttrennschalters (2) zumindest teilweise in die Kontaktbohrung (16) des Hohlkontaktes (4) eingreift. 4. Medium-voltage switch disconnector according to one of claims 1 to 3, characterized in that a moving contact (42) is designed as a pin contact (18) and in a closed state of the switch disconnector (2) at least partially into the contact bore (16) of the Hollow contact (4) engages.
5. Mittelspannung-Lasttrennschalter nach einem der Ansprüche5. Medium voltage switch disconnector according to one of the claims
1 bis 3, dadurch gekennzeichnet, dass die Isolierstoffdüse (8) um den Hohlkontakt (4) angeordnet ist. 1 to 3, characterized in that the insulating material nozzle (8) is arranged around the hollow contact (4).
6. Mittelspannung-Lasttrennschalter nach einem der Ansprüche6. Medium voltage switch disconnector according to one of the claims
2 bis 5, dadurch gekennzeichnet, dass der Stempel (24) und der Stiftkontakt (18) gekoppelt durch ein Antriebsaggregat bewegbar angeordnet sind. 2 to 5, characterized in that the plunger (24) and the pin contact (18) are coupled and movably arranged by a drive unit.
7. Mittelspannung-Lasttrennschalter nach einem der vorherge henden Ansprüche, dadurch gekennzeichnet, dass die Öffnung (12) des Selbstblasvolumens (10) zumindest teilweise durch einen Teilbereich des Hohlkontaktes (4) gebildet ist. 7. Medium voltage switch disconnector according to one of the preceding claims, characterized in that the opening (12) of the self-blowing volume (10) is at least partially formed by a portion of the hollow contact (4).
EP20710860.6A 2019-05-10 2020-03-05 Medium voltage load break switch Active EP3948912B1 (en)

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DE102019206807.3A DE102019206807A1 (en) 2019-05-10 2019-05-10 Medium voltage switch-disconnectors
PCT/EP2020/055866 WO2020229011A1 (en) 2019-05-10 2020-03-05 Medium-voltage circuit breaker

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EP3948912B1 EP3948912B1 (en) 2023-12-20

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DE (1) DE102019206807A1 (en)
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EP4024425A1 (en) * 2020-12-28 2022-07-06 Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co. Switching device with movable nozzle element

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR828466A (en) * 1937-01-28 1938-05-18 Alsthom Cgee Improvement in switches, arc blowing by gas under pressure, operating as self-compressors
CH556602A (en) * 1973-01-12 1974-11-29 Sprecher & Schuh Ag PRESSURE GAS SWITCH.
JPS52133575A (en) * 1976-05-04 1977-11-09 Hitachi Ltd Buffer gas breaker
DE3440212A1 (en) * 1984-10-10 1986-04-17 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
CN1008415B (en) * 1985-09-30 1990-06-13 Bbc勃朗勃威力有限公司 Gas-blast switch
JPH11213827A (en) * 1998-01-22 1999-08-06 Hitachi Ltd Puffer type gas-blast circuit breaker
JP4174094B2 (en) * 1998-01-29 2008-10-29 株式会社東芝 Gas circuit breaker
DE112005001520A5 (en) * 2004-08-23 2007-08-30 Abb Technology Ag HIGH POWER SWITCH
JP2006164673A (en) * 2004-12-06 2006-06-22 Hitachi Ltd Current breaking method of puffer type gas-blast circuit breaker and puffer type gas-blast circuit breaker using it
FR2906929B1 (en) * 2006-10-09 2009-01-30 Areva T & D Sa ACTUATION BY CONTACTS OF A DOUBLE MOVEMENT CUT CHAMBER BY AN INSULATING TUBE
DE102013200913A1 (en) * 2013-01-22 2014-07-24 Siemens Aktiengesellschaft switching arrangement
CN106030744B (en) * 2013-12-23 2019-07-02 Abb瑞士股份有限公司 Electrical switchgear
DE102015218003A1 (en) * 2015-09-18 2017-03-23 Siemens Aktiengesellschaft Medium or high voltage switchgear with a gas-tight insulation space
EP3764382A1 (en) * 2016-06-03 2021-01-13 ABB Schweiz AG Gas-insulated low- or medium-voltage load break switch
EP3261107A1 (en) * 2016-06-20 2017-12-27 ABB Schweiz AG Gas-insulated low- or medium-voltage switch with swirling device
DE102016219812A1 (en) * 2016-10-12 2018-04-12 Siemens Aktiengesellschaft switching arrangement
CN207367873U (en) * 2017-07-07 2018-05-15 河北电力装备有限公司 A kind of piston gas-pressing formula on-load switch

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CN113966542A (en) 2022-01-21
ES2974369T3 (en) 2024-06-27
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WO2020229011A1 (en) 2020-11-19
DE102019206807A1 (en) 2020-11-12

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