EP0024542A1 - Gas blast switch - Google Patents

Gas blast switch Download PDF

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Publication number
EP0024542A1
EP0024542A1 EP80104263A EP80104263A EP0024542A1 EP 0024542 A1 EP0024542 A1 EP 0024542A1 EP 80104263 A EP80104263 A EP 80104263A EP 80104263 A EP80104263 A EP 80104263A EP 0024542 A1 EP0024542 A1 EP 0024542A1
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EP
European Patent Office
Prior art keywords
switching chamber
support insulator
insulator
gas
support
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
EP80104263A
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German (de)
French (fr)
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EP0024542B1 (en
Inventor
Guido Hux
Hubert Wallimann
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Rockwell Automation Switzerland GmbH
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Sprecher und Schuh AG
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Priority to AT80104263T priority Critical patent/ATE1401T1/en
Publication of EP0024542A1 publication Critical patent/EP0024542A1/en
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Publication of EP0024542B1 publication Critical patent/EP0024542B1/en
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    • 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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H33/562—Means for avoiding liquefaction or for disposing of liquefaction products

Definitions

  • the invention relates to a gas pressure switch of the type mentioned in the preamble of claim 1.
  • the purpose of the heating device provided for the extinguishing gas is to prevent condensation of the pressurized extinguishing gas and the associated reduction in its density and dielectric strength at low ambient temperatures.
  • Such gas switches are known for example from DE-OS 28 25 744 and from GB-PS 1.229.036.
  • the extinguishing gas heated by the heating device rises by thermosiphon effect in a chimney-like pipeline running through the support insulator in the longitudinal direction to the switching chamber, while from this the cooler or the cooled gas in the between the inner wall of the support insulator and the outer wall of the Pipe free jacket space sinks back to the heater.
  • the support insulators have respectable heights, so that an effective and sufficiently rapid circulation of the extinguishing gas heated by the heating device (without further aids) requires sufficient flow cross sections of both the pipeline and the jacket space. This in turn requires a larger one Dimensioning the diameter of the support insulator than would be necessary due to its purely mechanical stress.
  • the switching chamber is supported horizontally on two tubular support insulators.
  • the interior of the first of these support insulators only serves as an exhaust space for the switching gases and is only opened via a valve during a switch-off stroke.
  • the interior of the second support insulator also serves to supply the heated and pressurized quenching gas to the switching chamber and to return the cooler or cooled quenching gas from the switching chamber back to the heating device.
  • the two flow paths in the interior of the second support insulator run directly next to one another and are not separated from one another by a partition.
  • the heated extinguishing gas which is further compressed by a blower or a compressor, is blown upward in a jet via a nozzle, and the suction side of the blower or the compressor draws cooler or cooled quenching gas from the interior of the second support insulator at a location adjacent to the nozzle .
  • one purpose of the present invention is to provide a switch of the type mentioned in the introduction, in which a sufficiently rapid circulation of the extinguishing occurs without increasing the cross section of the tragisolaror due to the effect of the heating device gases forms, the length of the support insulator is hardly an obstacle to this circulation.
  • the compressed gas switch 10 shown has a support housing 11 which is at ground potential and on which a tubular, upright support insulator 12 is flanged tightly, the height of which is essentially dependent on the nominal voltage and also on the type of installation for which the switch 10 is intended.
  • the support insulator 12 carries a switching chamber 13 arranged vertically here, which is enclosed by a tubular insulator 14 and is sealed at the top with a connecting flange 15. Between the insulator 14 and the supporting insulator 12 there is a lower connecting flange 16 which is tightly connected to the latter.
  • a set 17 with which Upper connecting flange 15 electrically connected contact pieces and a set 18 movable contact pieces are arranged, which are electrically connected to the lower connecting flange 16 and which are associated with a movable blowing nozzle 19 and a pump cylinder 20.
  • a push and pull rod 21 is coupled to the set 18 of movable contact pieces, which extends downward out of the switching chamber 13 and is anchored at the bottom to a push and pull tube 22 made of an insulating material, which at that time was connected via a further rod 23 and a connecting rod 24 is coupled to a crank 25 of a drive, not shown.
  • a compression spring 26 supported at the top in the support housing 11 and at the bottom on the rod 23 serves as an energy store for the switch-off stroke.
  • the switching chamber 13 and the interior of the support insulator 12 and the support housing 11 are sealed off from the outside, but are in flow communication with one another and contain an extinguishing gas under a pressure of about 5-20 bar, for example SF 6. As already mentioned in the introduction, it is It is important to avoid condensation of the extinguishing gas at lower ambient temperatures with such switches.
  • a heating device 27 which is electrically connected to the support housing 11 and is also connected to earth potential.
  • a heating - element for example an electric heating coil 28 which is arranged in a downwardly open tubular section 29th
  • This pipe section 29 is arranged coaxially and with radial play in a cup-shaped housing 30 - preferably made of a material which is poorly thermally but sufficiently electrically conductive - and is connected with its upper end to a bend 31, to which a radial pipe 32 leading out of the housing 30 is connected.
  • the tube 32 leads to a radial bore 33 in the flange 34 of the support housing, to which the support insulator 12 is tightly attached.
  • a connection line 35 Connected to the top of the housing 30 is a connection line 35 which is arranged next to the support insulator 12 and parallel to it, and which establishes a flow connection between the heating device 27 and the switching chamber 13.
  • this connecting line 35 has a first, tubular insulator 36, a metallic connecting sleeve 38 fastened at the level of the lower connecting flange 16 and to it via a strut 37, and a second one, in addition to the insulator 14 and in parallel this arranged tubular insulator 39, the upper end of which is connected to a metallic connecting piece 42 provided with cooling fins 40 and a laterally projecting connecting piece 41.
  • the connecting piece 41 is connected in a manner not shown in detail to a bore 43 leading radially out of the upper connecting flange 15, which in turn extends from the upper end of the switching chamber 13. It should be noted that in switch 10 - be it in the switch-on or in the switch-off position shown - apart from the small pressure drop caused by the heating device 27 (when switched on), the extinguishing gas pressure is essentially the same everywhere.
  • the heating coil 28 heats the extinguishing gas which brushes it, which in turn rises in the tube 29 and at the same time draws further extinguishing gas from the connecting line 35 via the jacket space remaining between the housing 30 and the tube 29 and the lower, open end of the tube 29.
  • the heated extinguishing gas passes through the pipe 32 and the bore 33 below in the interior of the T tragisolators 12 and rises through this and through the switching chamber 13, whereby it cools, depending on the ambient temperature, more or less.
  • the somewhat cooled quenching gas now leaves the switching chamber 13 and enters the connecting piece 42 provided with cooling fins, where it is cooled further. As a result, the gas now drops again in the connecting line 35 to the heating device 27.
  • a temperature sensor 44 In the area of the lower end of the connecting line 35, a temperature sensor 44, only shown schematically, may be provided, which e.g. regulates the heating power consumed by the heating coil 28 via a switch 45, e.g. switches on or off.
  • the connecting line 35 in FIG. 2 only extends to the lower connecting flange 16. Accordingly, the connecting line 35 has only the tubular insulator 36 on which the connecting piece 42 is placed tightly. Its connecting piece 41 is connected to a passage 46 formed in the lower connecting flange 16, which in turn extends from the lower end of the switching chamber 13.
  • the entire switch is included in this circulation path.
  • This embodiment is therefore particularly suitable for outdoor installation in areas where particularly low ambient temperatures are to be expected.
  • the somewhat less complex embodiment of FIG. 2 on the other hand, is more suitable for installation in areas in which extremely low ambient temperatures are not to be expected.
  • extinguishing gas circulation can be increased using known means, such as a pump or fan, which are not shown in the drawings.
  • This increased extinguishing gas circulation can be advantageous both in extremely cold weather and in the event of a high current load on the compressed gas switch, in which case the heating coil 28 is switched off by the temperature sensor 44 and the switch 45.

Landscapes

  • Circuit Breakers (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Control Of Combustion (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Glass Compositions (AREA)

Abstract

1. Gas-blast switch having a tubular support insulator (12) being supported on a support housing (11) at ground potential and supporting in turn at least one switching chamber (13) the inner spaces of the support housing (11), of the support insulator (12) and of the switching chamber (13) being totally enclosed but in flow communication with one another and containing a pressurized quenching gas, said switch having further a quenching gas heating device (27) at ground potential, the device being in flow communication with the switching chamber (13) via the support insulator (12), characterized in that a connection line (35) leading from the switching chamber (13) and positioned adjacent the support insulator (12) extends to the heating device (17).

Description

Die Erfindung betrifft einen Druckgasschalter der im Oberbegriff des Patentanspruches 1 erwähnten Gattung.The invention relates to a gas pressure switch of the type mentioned in the preamble of claim 1.

Die für das Löschgas vorgesehene Heizvorrichtung bezweckt, bei niedrigen Umgebungstemperaturen eine Kondensation des unter Druck stehenden Löschgases und die damit einhergehende Verminderung dessen Dichte und dielektrischer Festigkeit zu verhindern.The purpose of the heating device provided for the extinguishing gas is to prevent condensation of the pressurized extinguishing gas and the associated reduction in its density and dielectric strength at low ambient temperatures.

Solche Druckgasschalter sind zum Beispiel aus der DE-OS 28 25 744 und aus der GB-PS 1.229.036 bekannt. Bei diesen Schaltern steigt das durch die Heizvorrichtung erwärmte Löschgas durch Thermosyphon-Wirkung in einer durch den Tragisolator in Längsrichtung hindurch verlaufende, kaminartige Rohrleitung zur Schaltkammer empor, während aus dieser das kühlere oder das abgekühlte Gas in dem zwischen der Innenwand des Tragisolators und der Aussenwand der Rohrleitung frei bleibenden Mantelraum wieder zur Heizvorrichtung hin absinkt. Bei Schaltern für vergleichsweise hohe Nennspannungen weisen die Tragisolatoren respektable Höhen auf, so dass eine wirksame und genügend rasche Zirkulation des von der Heizvorrichtung erwärmten Löschgases (ohne weitere Hilfsmittel) ausreichender Strömungsquerschnitte sowohl der Rohrleitung als auch des Mantelraumes bedarf. Dies wiederum bedingt eine grössere Bemessung des Durchmessers des Tragisolators als es durch dessen rein mechanische Beanspruchung notwendig wäre.Such gas switches are known for example from DE-OS 28 25 744 and from GB-PS 1.229.036. In these switches, the extinguishing gas heated by the heating device rises by thermosiphon effect in a chimney-like pipeline running through the support insulator in the longitudinal direction to the switching chamber, while from this the cooler or the cooled gas in the between the inner wall of the support insulator and the outer wall of the Pipe free jacket space sinks back to the heater. In the case of switches for comparatively high nominal voltages, the support insulators have respectable heights, so that an effective and sufficiently rapid circulation of the extinguishing gas heated by the heating device (without further aids) requires sufficient flow cross sections of both the pipeline and the jacket space. This in turn requires a larger one Dimensioning the diameter of the support insulator than would be necessary due to its purely mechanical stress.

Bei einem anderen, bekannten Schalter der eingangsgenannten Art (US-PS 3.749.869) ist die Schaltkammer horizontal auf zwei rohrförmigen Tragisolatoren abgestützt. Der Innenraum des ersten dieser Tragisolatoren dient nur als Auspuffraum für die Schaltgase und wird nur bei einem Ausschalthub über ein Ventil geöffnet. Der Innenraum des zweiten Tragisolators dagegen, dient ebenfalls zum Zuführen des erwärmten und unter Druck stehenden Löschgases zur Schaltkammer und zum Rückführen des kühleren bzw. gekühlten Löschgases von der Schaltkammer zurück zur Heizvorrichtung. Die beiden Strömungswege im Innenraum des zweiten Tragisolators laufen unmittelbar nebeneinander und sind nicht etwa durch eine Trennwand voneinander getrennt. Ueber eine Düse wird das erwärmte und durch ein Gebläse oder einen Kompressor weiter komprimierte Löschgas in einem Strahl nach oben geblasen und die Saugseite des Gebläses bzw. des Kompressors schöpft kühleres bzw. abgekühltes Löschgas an einer der Düse seitlich benachbarten Stelle aus dem Innenraum des zweiten Tragisolators.In another known switch of the type mentioned (US Pat. No. 3,749,869), the switching chamber is supported horizontally on two tubular support insulators. The interior of the first of these support insulators only serves as an exhaust space for the switching gases and is only opened via a valve during a switch-off stroke. The interior of the second support insulator, on the other hand, also serves to supply the heated and pressurized quenching gas to the switching chamber and to return the cooler or cooled quenching gas from the switching chamber back to the heating device. The two flow paths in the interior of the second support insulator run directly next to one another and are not separated from one another by a partition. The heated extinguishing gas, which is further compressed by a blower or a compressor, is blown upward in a jet via a nozzle, and the suction side of the blower or the compressor draws cooler or cooled quenching gas from the interior of the second support insulator at a location adjacent to the nozzle .

Dass die Länge der Strömungswege bei dieser Anordnung nur sehr beschränkt sein kann, leuchtet ohne weiteres ein. Dementsprechend ist diese Anordnung bei Hochspannungsschaltern (mit Tragisolatorenbeträchtlicher Höhe) nicht brauchbar.It is obvious that the length of the flow paths in this arrangement can be very limited. Accordingly, this arrangement is not useful in high-voltage switches (with considerable height of isolators).

Dementsprechend ist ein Zweck der vorliegenden Erfindung darin zu sehen, einen Schalter der eingangs genannten Art zu schaffen, bei dem sich ohne Vergrösserung des Querschnittes des Tragisolarors durch die Wirkung der Heizvorrichtung eine ausreichend rasche Zirkulation des Löschgases ausbildet, wobei die Länge des Tragisolatores dieser Zirkulation kaum hemmend im Wege steht.Accordingly, one purpose of the present invention is to provide a switch of the type mentioned in the introduction, in which a sufficiently rapid circulation of the extinguishing occurs without increasing the cross section of the tragisolaror due to the effect of the heating device gases forms, the length of the support insulator is hardly an obstacle to this circulation.

Dieser Zweck wird beim vorgeschlagenen Druckgasschalter durch die im Kennzeichen des Patentanspruches 1 angegebenen Merkmale erreicht.This purpose is achieved in the proposed gas pressure switch by the features specified in the characterizing part of patent claim 1.

Merkmale bevorzugter Ausführungsformen sind den abhängigen Patentansprüchen sowie der nachfolgenden Beschreibung von Ausführungbeispielen der Erfindung zu entnehmen. Es zeigt:

  • Fig. 1 einen Längsschnitt durch eine erste, und
  • Fig. 2 einen Längsschnitt durch eine zweite Ausführungsform.
Features of preferred embodiments can be found in the dependent patent claims and the following description of exemplary embodiments of the invention. It shows:
  • Fig. 1 shows a longitudinal section through a first, and
  • Fig. 2 shows a longitudinal section through a second embodiment.

In der Zeichnung sind für funktionell sich entsprechende Teile jeweils dieselben Bezugsziffern verwendet.In the drawing, the same reference numerals are used for functionally corresponding parts.

Der dargestellte Druckgasschalter 10besitzt ein an Erdpotential liegendes Traggehäuse 11, auf dem ein rohrförmiger, aufrecht stehender Tragisolator 12 dicht angeflanscht ist, dessen Höhe im wesentlichen von der Nennspannung und auch von der Aufstellungsart, für die der Schalter 10 bestimmt ist, abhängig ist.The compressed gas switch 10 shown has a support housing 11 which is at ground potential and on which a tubular, upright support insulator 12 is flanged tightly, the height of which is essentially dependent on the nominal voltage and also on the type of installation for which the switch 10 is intended.

Der Tragisolator 12 trägt eine hier vertikal angeordnete Schaltkammer 13, die von einem rohrförmigen Isolator 14 umschlossen ist und oben mit einem Anschlussflansch 15 dicht verschlossen ist. Zwischen dem Isolator 14 und dem Tragisolator 12 ist ein dicht mit diesen verbundener, unterer Anschlussflansch 16 angeordnet.The support insulator 12 carries a switching chamber 13 arranged vertically here, which is enclosed by a tubular insulator 14 and is sealed at the top with a connecting flange 15. Between the insulator 14 and the supporting insulator 12 there is a lower connecting flange 16 which is tightly connected to the latter.

In der Schaltkammer 13 ist ein Satz 17 fester, mit dem oberen Anschlussflansch 15 elektrisch verbundener Kontaktstücke und ein Satz 18 beweglicher Kontaktstücke angeordnet, die elektrisch mit dem unteren Anschlussflansch 16 verbunden sind und denen eine bewegliche Blasdüse 19 sowie ein Pumpzylinder 20 zugeordnet sind. An den Satz 18 beweglicher Kontaktstücke ist eine Schub- und Zugstange 21 gekoppelt, die sich nach unten aus der Schältkammer 13 heraus erstreckt und unternends an einen Schub- und Zugrohr 22 aus einem Isolierstoff verankert ist, welches seinerzeit über eine weitere Stange 23 und einen Pleuel 24 an eine Kurbel 25 eines nicht näher dargestellten Antriebes gekoppelt ist. Eine obernends im Traggehäuse 11 und unternends an der Stange 23 abgestützte Druckfeder 26 dient als Kraftspeicher für den Ausschalthub.In the switching chamber 13 is a set 17 with which Upper connecting flange 15 electrically connected contact pieces and a set 18 movable contact pieces are arranged, which are electrically connected to the lower connecting flange 16 and which are associated with a movable blowing nozzle 19 and a pump cylinder 20. A push and pull rod 21 is coupled to the set 18 of movable contact pieces, which extends downward out of the switching chamber 13 and is anchored at the bottom to a push and pull tube 22 made of an insulating material, which at that time was connected via a further rod 23 and a connecting rod 24 is coupled to a crank 25 of a drive, not shown. A compression spring 26 supported at the top in the support housing 11 and at the bottom on the rod 23 serves as an energy store for the switch-off stroke.

Die Schaltkammer 13 und die Innenräume des Tragisolators 12 sowie des Traggehäuses 11 sind nach aussen dicht abgeschlossen, stehen jedoch untereinander in Strömungsverbindung und enthalten ein unter einem Druck von etwa 5-20 bar stehendes Löschgas, zum Beispiel SF 6 Wie bereits einleitend erwähnt, ist es wichtig, bei solchen Schaltern eine Kondensation des Löschgases bei tieferen Umgebungstemperaturen zu vermeiden.The switching chamber 13 and the interior of the support insulator 12 and the support housing 11 are sealed off from the outside, but are in flow communication with one another and contain an extinguishing gas under a pressure of about 5-20 bar, for example SF 6. As already mentioned in the introduction, it is It is important to avoid condensation of the extinguishing gas at lower ambient temperatures with such switches.

Zu diesem Zweck ist eine elektrisch mit dem Traggehäuse 11 verbundene - also ebenfalls an Erdpotential liegende - Heizvorrichtung 27 vorgesehen. Diese weist im einzelnen ein Heiz- element, zum Beispiel eine elektrische Heizwendel 28 auf, die in einem unten offenen Rohrabschnitt 29 angeordnet ist. Dieser Rohrabschnitt 29 ist koaxial und mit radialem Spiel in einem.becherförmigen Gehäuse 30 - vorzugsweise aus einem thermisch schlecht jedoch elektrisch ausreichend leitendem Material - angeordnet, und ist mit seinem oberen Ende an einen Krümmer 31 angeschlossen, an den ein radial aus dem Gehäuse 30 herausführendes Rohr 32 angeschlossen ist. Das Rohr 32 führt zu einer radialen Bohrung 33 im Flansch 34 des Traggehäuses, an welchem der Tragisolator 12 dicht befestigt ist. Obernends ist am Gehäuse 30 eine neben dem Tragisolator 12 und parallel zu diesem angeordnete Verbindungsleitung 35 angeschlossen, welche eine Strömungsverbindung zwischen der Heizvorrichtung 27 und der Schaltkammer 13 herstellt.For this purpose, a heating device 27 is provided which is electrically connected to the support housing 11 and is also connected to earth potential. This includes in particular, a heating - element, for example an electric heating coil 28 which is arranged in a downwardly open tubular section 29th This pipe section 29 is arranged coaxially and with radial play in a cup-shaped housing 30 - preferably made of a material which is poorly thermally but sufficiently electrically conductive - and is connected with its upper end to a bend 31, to which a radial pipe 32 leading out of the housing 30 is connected. The tube 32 leads to a radial bore 33 in the flange 34 of the support housing, to which the support insulator 12 is tightly attached. Connected to the top of the housing 30 is a connection line 35 which is arranged next to the support insulator 12 and parallel to it, and which establishes a flow connection between the heating device 27 and the switching chamber 13.

Diese Verbindungsleitung 35 weist bei der Ausführungsform gemäss Fig. 1 einen ersten, rohrförmigen Isolator 36, eine auf der Höhe des unteren Anschlussflansches 16 und an diesen über eine Strebe 37 befestigte, metallische Verbindungsmuffe 38, sowie einen zweiten, neben dem Isolator 14 und parallel zu diesem angeordneten rohrförmigen Isolator 39 auf, dessen oberes Ende mit einem metallischen, mit Kühlrippen 40 und einem seitlich abstehenden Anschlussstutzen 41 versehenen Anschlussstück 42 verbunden ist. Der Anschlussstutzen 41 ist auf nicht näher dargestellte Weise dicht an eine radial aus dem oberen Anschlussflansch 15 herausführende Bohrung 43 angeschlossen, die ihrerseits vom oberen Ende der Schaltkammer ,13 ausgeht. Es ist zu beachten, dass im Schalter 10 - sei es in Einschalt-oder in der dargestellten Ausschaltstellung - abgesehen von dem kleinen, durch die Heizvorrichtung 27 (wenn eingeschaltet) bedingten Druckgefälle, überall im wesentlichen der gleiche Löschgasdruck herrscht.In the embodiment according to FIG. 1, this connecting line 35 has a first, tubular insulator 36, a metallic connecting sleeve 38 fastened at the level of the lower connecting flange 16 and to it via a strut 37, and a second one, in addition to the insulator 14 and in parallel this arranged tubular insulator 39, the upper end of which is connected to a metallic connecting piece 42 provided with cooling fins 40 and a laterally projecting connecting piece 41. The connecting piece 41 is connected in a manner not shown in detail to a bore 43 leading radially out of the upper connecting flange 15, which in turn extends from the upper end of the switching chamber 13. It should be noted that in switch 10 - be it in the switch-on or in the switch-off position shown - apart from the small pressure drop caused by the heating device 27 (when switched on), the extinguishing gas pressure is essentially the same everywhere.

Im Betrieb heizt die Heizwendel 28 das dieses bestreichende Löschgas auf, welches seinerseits im Rohr 29 aufsteigt und zugleich über den zwischen Gehäuse 30 und Rohr 29 frei bleibenden Mantelraum und das untere, offene Ende des Rohres 29 weiteres Löschgas aus der Verbindungsleitung 35 nachzieht. Das erwärmte Löschgas gelangt über das Rohr 32 und die Bohrung 33 unternends in den Innenraum des Tragisolators 12 und steigt durch diesen und durch die Schaltkammer 13 empor, wobei es sich, je nach Umgebungstemperatur, mehr oder weniger abkühlt. Durch die Bohrung 43 und den Anschlussstutzen 41 verlässt nun das bereits etwas abgekühlte Löschgas die Schaltkammer 13 und gelangt in das mit Kühlrippen versehene Anschlussstück 42, wo es eine weiter Abkühlung erfährt. Daduch sinkt das Gas nun wieder in der Verbindungsleitung 35 zur Heizvorrichtung 27 hin ab.In operation, the heating coil 28 heats the extinguishing gas which brushes it, which in turn rises in the tube 29 and at the same time draws further extinguishing gas from the connecting line 35 via the jacket space remaining between the housing 30 and the tube 29 and the lower, open end of the tube 29. The heated extinguishing gas passes through the pipe 32 and the bore 33 below in the interior of the T tragisolators 12 and rises through this and through the switching chamber 13, whereby it cools, depending on the ambient temperature, more or less. Through the bore 43 and the connecting piece 41, the somewhat cooled quenching gas now leaves the switching chamber 13 and enters the connecting piece 42 provided with cooling fins, where it is cooled further. As a result, the gas now drops again in the connecting line 35 to the heating device 27.

Da in Einschaltstellung des Schalters in der Schaltkammer 13 je nach geführtem Strom ebenfalls Wärme entsteht, braucht die Heizwendel nicht ununterbrochen eingeschaltet zu bleiben. Deshalb kann, z.B. im Bereich des unteren Endes der Verbindungsleitung 35, ein nur schematisch angegebener Temperaturfühler 44 vorgesehen sein, der z.B. über einen Schalter 45 die von der Heizwendel 28 aufgenommene Heizleistung regelt, z.B. zu- oder abschaltet.Since heat is also generated in the switch chamber 13 when the switch is in the on position, depending on the current being conducted, the heating coil need not remain switched on continuously. Therefore, e.g. In the area of the lower end of the connecting line 35, a temperature sensor 44, only shown schematically, may be provided, which e.g. regulates the heating power consumed by the heating coil 28 via a switch 45, e.g. switches on or off.

Der wesentliche Unterschied zwischen der Ausführungsform der Fig. 1 und jener der Fig. 2 besteht darin, dass die Verbindungsleitung 35 bei der Fig. 2 nur bis zum unteren Anschlussflansch 16 reicht. Dementsprechend weist die Verbindungsleitung 35 nur den rohrförmigen Isolator 36 auf, auf den das Anschlussstück 42 dicht aufgesetzt ist. Dessen Anschlussstutzen 41 ist mit einem im unteren Anschlussflansch 16 ausgebildeten Durchlass 46 verbunden, der seinerseits vom unteren Ende der Schaltkammer 13 ausgeht.The essential difference between the embodiment of FIG. 1 and that of FIG. 2 is that the connecting line 35 in FIG. 2 only extends to the lower connecting flange 16. Accordingly, the connecting line 35 has only the tubular insulator 36 on which the connecting piece 42 is placed tightly. Its connecting piece 41 is connected to a passage 46 formed in the lower connecting flange 16, which in turn extends from the lower end of the switching chamber 13.

In beiden Fällen ist eine (selbst wenn nur die Thermosyphon-Wirkung ausgenützt wird) wirksame Zirkulation des Löschgases durch die Heizvorrichtung hindurch gewährleistet.In both cases (even if only the thermosiphon effect is used) an effective circulation of the extinguishing gas through the heating device is ge ensures.

Bei der Ausführungsform der Fig. 1 wird der gesamte Schalter in diesen Zirkulationsweg einbezogen. Diese Ausführungsform eignet sich daher besonders zur Freiluft-Aufstellung in Gebieten, wo besonders niedrige Umgebungstemperaturen zu erwarten sind. Die etwas weniger aufwendige Ausführungsform der Fig. 2 eignet sich dagegen eher zur Aufstellung in Gebieten, in denen nicht extrem tiefe Umgebungstemperaturen zu erwarten sind.In the embodiment of FIG. 1, the entire switch is included in this circulation path. This embodiment is therefore particularly suitable for outdoor installation in areas where particularly low ambient temperatures are to be expected. The somewhat less complex embodiment of FIG. 2, on the other hand, is more suitable for installation in areas in which extremely low ambient temperatures are not to be expected.

Selbstverständlich kann die Löschgaszirkulation mit bekannten, in den Zeichnungen nicht näher dargestellten Mitteln, wie Pumpe oder Ventilator, verstärkt werden. Diese verstärkte Löschgaszirkulation kann sowohl bei extrem kalter Witterung, als auch bei hoher Strombelastung des Druckgasschalters von Vorteil sein, wobei in letzterem Fall die Heizwendel 28 durch den Temperaturfühler 44 und den Schalter 45 abgeschaltet ist.Of course, the extinguishing gas circulation can be increased using known means, such as a pump or fan, which are not shown in the drawings. This increased extinguishing gas circulation can be advantageous both in extremely cold weather and in the event of a high current load on the compressed gas switch, in which case the heating coil 28 is switched off by the temperature sensor 44 and the switch 45.

Claims (7)

1. Druckgasschalter mit einem rohrförmigen Tragisolator (12), der auf einem an Erdpotential liegenden Traggehäuse (11) abgestützt ist und seinerseits wenigstens eine Schaltkammer (13) trägt, wobei die Innenräume des Traggehäuses (11) und des Tragisolators(12) sowie die Schaltkammer (13) nach aussen abgekapselt, jedoch untereinander in Strömungsverbindung stehen und ein Löschgas unter Druck enthalten, sowie mit einer am Erdpotential liegenden Löschgas-Heizvorrichtung (27) die über den Tragisolator (12) mit der Schaltkammer (13) in Verbindung steht, dadurch gekennzeichnet, dass von der Schaltkammer (13) eine neben dem Tragisolator (12) angeordnete Verbindungsleitung(35) zu der Heizvorrichtung (27)-ausgeht.1. Gas switch with a tubular support insulator (12), which is supported on a grounded support housing (11) and in turn carries at least one switching chamber (13), the interior of the support housing (11) and the support insulator (12) and the switching chamber (13) encapsulated to the outside, but in flow connection with one another and containing an extinguishing gas under pressure, and with an extinguishing gas heating device (27) which is at earth potential and is connected to the switching chamber (13) via the support insulator (12), characterized that a connection line (35) arranged next to the support insulator (12) to the heating device (27) extends from the switching chamber (13). 2. Druckgasschalter nach Patentanspruch 1, dadurch gekennzeichnet, dass die Verbindungsleitung (35) im wesentlichen durch einen oder mehrere rohrförmige, parallel zum Tragisolator (12) angeordnete Isolatoren (36,39) gebildet ist.2. Pressure gas switch according to claim 1, characterized in that the connecting line (35) is essentially formed by one or more tubular insulators (36, 39) arranged parallel to the supporting insulator (12). 3. Druckgasschalter nach Patentanspruch 1, dadurch gekennzeichnet, dass die Verbindungsleitung (35) vom Bereich des dem Tragisolator (12) abgekehrten Endes der Schaltkammer (13) ausgeht (Fig. 1).3. Gas-blast switch according to claim 1, characterized in that the connecting line (35) extends from the region of the end of the switching chamber (13) remote from the supporting insulator (12) (FIG. 1). 4. Druckgasschalter nach Patentanspruch 1, dadurch gekennzeichnet, dass die Verbindungsleitung (35) vom Bereich des dem Tragisolator (12) zugekehrten Endes der Schaltkammer (13) ausgeht (Fig. 2).4. Gas switch according to claim 1, characterized in that the connecting line (35) from the region of the support insulator (12) facing end of the switching chamber (13) (Fig. 2). 5. Druckgasschalter nach Patentanspruch 1, dadurch gekennzeichnet, dass Mittel (29,31; 40) vorgesehen sind, um das Löschgas im Tragisolator (12) von unten nach oben und in der Verbindungsleitung (35) von oben nach unten strömen zu lassen.5. Pressure gas switch according to claim 1, characterized in that means (29,31; 40) are provided to let the extinguishing gas flow in the support insulator (12) from bottom to top and in the connecting line (35) from top to bottom. 6. Druckgasschalter nach Patentanspruch 5, dadurch gekennzeichnet, dass die genannten Mittel einen am obern Ende der Verbindungsleitung (35) angeordneten Gaskühler (40) aufweisen.6. Pressure gas switch according to claim 5, characterized in that said means have a gas cooler (40) arranged at the upper end of the connecting line (35). 7. Druckgasschalter nach Patentanspruch 5, dadurch gekennzeichnet, dass die genannten Mittel ein im unteren Bereich der Verbindungsleitung (35) angeordnetes, ein Heizelement (28) enthaltendes Rohr (29) aufweisen, dessen unteres Ende offen ist, und dessen oberes Ende über einen Krümmer (31) mit dem unteren Bereich des Innenraumes des Tragisolators (12) verbunden ist.7. Pressure gas switch according to claim 5, characterized in that said means have a in the lower region of the connecting line (35) arranged, a heating element (28) containing tube (29), the lower end of which is open, and the upper end of which is via a bend (31) is connected to the lower region of the interior of the support insulator (12).
EP80104263A 1979-08-30 1980-07-19 Gas blast switch Expired EP0024542B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104263T ATE1401T1 (en) 1979-08-30 1980-07-19 GAS SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7857/79 1979-08-30
CH785779A CH641292A5 (en) 1979-08-30 1979-08-30 EXHAUST GAS SWITCH.

Publications (2)

Publication Number Publication Date
EP0024542A1 true EP0024542A1 (en) 1981-03-11
EP0024542B1 EP0024542B1 (en) 1982-07-28

Family

ID=4331475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104263A Expired EP0024542B1 (en) 1979-08-30 1980-07-19 Gas blast switch

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EP (1) EP0024542B1 (en)
JP (1) JPS5636816A (en)
AT (1) ATE1401T1 (en)
CA (1) CA1140191A (en)
CH (1) CH641292A5 (en)
DE (1) DE3060706D1 (en)
ZA (1) ZA805057B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582145A1 (en) * 1985-05-15 1986-11-21 Alsthom Sulphur hexafluoride circuit breaker operating in a very-low-temperature environment
EP0204180A1 (en) * 1985-05-15 1986-12-10 Alsthom Switch with sulfur hexafluoride operating in a very low temperature environment
CN103779132A (en) * 2013-01-22 2014-05-07 上海乐研电气科技有限公司 Sulfur hexafluoride high-voltage circuit breaker used in cold regions
EP2715892B1 (en) 2011-05-24 2017-07-26 Schneider Electric Industries SAS Gas insulated switchgear having a fluorine compound

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382922U (en) * 1989-12-12 1991-08-23

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358104A (en) * 1964-10-29 1967-12-12 Westinghouse Electric Corp Heating means for compressed-gas circuit interrupters
CH475644A (en) * 1966-11-03 1969-07-15 Merlin Gerin Closed circuit compressed gas circuit breaker
DE1943218A1 (en) * 1969-08-20 1971-03-04 Siemens Ag Gas pressure switch
GB1229036A (en) * 1968-07-23 1971-04-21
US3742169A (en) * 1970-01-30 1973-06-26 Siemens Ag Device for compressed gas circuit breaker
FR2203157A1 (en) * 1972-10-12 1974-05-10 Bbc Brown Boveri & Cie
FR2404907A1 (en) * 1977-09-28 1979-04-27 Sprecher & Schuh Ag HIGH VOLTAGE COMPRESSED GAS CIRCUIT BREAKER FOR THE EXTERIOR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936751A (en) * 1972-08-10 1974-04-05
JPS5113217A (en) * 1974-07-23 1976-02-02 Shinko Electric Co Ltd DEJITARUYOKASETSUTOSHIKIJIKITEEPUNO UNTENSEIGYOHOHO

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358104A (en) * 1964-10-29 1967-12-12 Westinghouse Electric Corp Heating means for compressed-gas circuit interrupters
CH475644A (en) * 1966-11-03 1969-07-15 Merlin Gerin Closed circuit compressed gas circuit breaker
GB1229036A (en) * 1968-07-23 1971-04-21
DE1943218A1 (en) * 1969-08-20 1971-03-04 Siemens Ag Gas pressure switch
US3742169A (en) * 1970-01-30 1973-06-26 Siemens Ag Device for compressed gas circuit breaker
FR2203157A1 (en) * 1972-10-12 1974-05-10 Bbc Brown Boveri & Cie
FR2404907A1 (en) * 1977-09-28 1979-04-27 Sprecher & Schuh Ag HIGH VOLTAGE COMPRESSED GAS CIRCUIT BREAKER FOR THE EXTERIOR

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582145A1 (en) * 1985-05-15 1986-11-21 Alsthom Sulphur hexafluoride circuit breaker operating in a very-low-temperature environment
EP0204180A1 (en) * 1985-05-15 1986-12-10 Alsthom Switch with sulfur hexafluoride operating in a very low temperature environment
EP2715892B1 (en) 2011-05-24 2017-07-26 Schneider Electric Industries SAS Gas insulated switchgear having a fluorine compound
CN103779132A (en) * 2013-01-22 2014-05-07 上海乐研电气科技有限公司 Sulfur hexafluoride high-voltage circuit breaker used in cold regions
CN103779132B (en) * 2013-01-22 2019-09-06 上海乐研电气有限公司 A kind of SF 6 high-voltage circuit breaker for cold district

Also Published As

Publication number Publication date
ZA805057B (en) 1981-08-26
ATE1401T1 (en) 1982-08-15
CA1140191A (en) 1983-01-25
DE3060706D1 (en) 1982-09-16
EP0024542B1 (en) 1982-07-28
CH641292A5 (en) 1984-02-15
JPS5636816A (en) 1981-04-10

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