EP0024542B1 - Interrupteur à gaz comprimé - Google Patents

Interrupteur à gaz comprimé Download PDF

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Publication number
EP0024542B1
EP0024542B1 EP80104263A EP80104263A EP0024542B1 EP 0024542 B1 EP0024542 B1 EP 0024542B1 EP 80104263 A EP80104263 A EP 80104263A EP 80104263 A EP80104263 A EP 80104263A EP 0024542 B1 EP0024542 B1 EP 0024542B1
Authority
EP
European Patent Office
Prior art keywords
gas
support insulator
switching chamber
connection line
blast switch
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.)
Expired
Application number
EP80104263A
Other languages
German (de)
English (en)
Other versions
EP0024542A1 (fr
Inventor
Guido Hux
Hubert Wallimann
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh 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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to AT80104263T priority Critical patent/ATE1401T1/de
Publication of EP0024542A1 publication Critical patent/EP0024542A1/fr
Application granted granted Critical
Publication of EP0024542B1 publication Critical patent/EP0024542B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—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 2825744 and from GB-PS 1229036.
  • 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 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 dimensioning of the diameter of the support insulator than would be necessary due to its purely mechanical stress.
  • the switching chamber is supported horizotnal 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 upwards in a jet via a nozzle and the suction side of the blower or the compressor scoops cooler or cooled quenching gas at a location laterally adjacent to the nozzle from the interior of the second support insulator .
  • the pressure gas switch 10 shown has a support housing 11 which is connected to earth potential and on which a tubular, upright support insulator 12 is flanged tightly, the height of which essentially depends 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 support insulator 12 there is a lower connecting flange 16 which is tightly connected to the insulator 14.
  • a push and pull rod 21 is coupled to the set 18 of movable contact pieces, which extends downwards 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 to 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 each other and ent hold an extinguishing gas under a pressure of about 5-20 bar, for example SF 6. As already mentioned in the introduction, it is important to avoid condensation of the extinguishing gas in such switches at lower ambient temperatures.
  • a heating device 27 which is electrically connected to the support housing 11 and is also connected to earth potential.
  • this has a heating element, for example an electric heating coil 28, which is arranged in a tube section 29 open at the bottom.
  • 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 at its upper end to a bend 31 to which a pipe leading radially out of the housing 30 is connected 32 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 the latter and which creates 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 by means of a strut 37, and a second one next 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 hole 43 leading radially out of the upper connecting flange 15, which in turn originates from the upper end of the switching chamber 13. It should be noted that, apart from the small pressure drop caused by the heating device 27 (when switched on), the switch extinguishing gas pressure is essentially the same everywhere in the switch 10 - be it in the switched-on or in the switch-off position shown.
  • the heating coil 28 heats up the extinguishing gas which brushes it, which in turn rises in the pipe 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 pipe 29 and the lower, open end of the pipe 29.
  • the heated extinguishing gas passes through the pipe 32 and the bore 33 at the bottom into the interior of the support insulator 12 and rises through it and through the switching chamber 13, cooling more or less, depending on the ambient temperature.
  • the already somewhat cooled extinguishing gas now leaves the switching chamber 13 through the bore 43 and the connecting piece 41 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)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Glass Compositions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Control Of Combustion (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (7)

1. Disjoncteur à gaz comprimé comprenant un support isolateur (12) tubulaire monté sur un boîtier support (11) au potentiel de la terre et qui porte de son côté au moins une chambre de disjonction (13), les volumes internes respectifs du boîtier support (11) et du support isolateur (12) ainsi que la chambre de disjonction (13) étant obturés par rapport à l'extérieur, mais se trouvant cependant en liaison de circulation entre eux et contenant un gas d'extinction sous pression, ainsi qu'un dispositif de chauffage (27) du gaz d'extinction, mis au potentiel de la terre, qui est relié à la chambre de disjonction (13) par le support isolateur (12), caractérisé en ce qu'un conduit de liaison (35) placé à côté du support isolateur (12) va de la chambre de disjonction (13) au dispositif de chauffage (27).
2. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que le conduit de liaison (35) est essentiellement constitué par un ou plusieurs isolateurs (36, 39) tubulaires disposés parallèlement au support isolateur (12).
3. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que le conduit de liaison (35) provient de la zone de l'extrémité de la chambre de disjonction (13) qui est distante du support isolateur (12) (fig. 1).
4. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que le conduit de liaison (35) provient de la zone de l'extrémité de la chambre de disjonction (13) qui est proche du support isolateur (12).
5. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que des moyens (29, 31; 40) sont prévus pour faire circuler le gaz d'extinction du bas vers le haut dans le support isolateur (12) et du haut vers le bas dans le conduit de liaison (35).
6. Disjoncteur à gaz comprimé selon la revendication 5, caractérisé en ce que lesdits moyens comprennent un refroidisseur de gaz (40) placé à l'extrémité supérieure du conduit de liaison (35).
7. Disjoncteur à gaz comprimé selon la revendication 5, caractérisé en ce que lesdits moyens comprennent un tuyau (29) logeant un élément chauffant (28) et placé dans la partie inférieure du conduit de liaison (35), tuyau dont l'extrémité inférieure est ouverte et dont l'extrémité supérieure est reliée par un coude (31) avec la zone inférieure du volume interne du support isolateur (12).
EP80104263A 1979-08-30 1980-07-19 Interrupteur à gaz comprimé Expired EP0024542B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104263T ATE1401T1 (de) 1979-08-30 1980-07-19 Druckgasschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH785779A CH641292A5 (de) 1979-08-30 1979-08-30 Druckgasschalter.
CH7857/79 1979-08-30

Publications (2)

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

Family

ID=4331475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104263A Expired EP0024542B1 (fr) 1979-08-30 1980-07-19 Interrupteur à gaz comprimé

Country Status (7)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3666521D1 (en) * 1985-05-15 1989-11-23 Alsthom Switch with sulfur hexafluoride operating in a very low temperature environment
FR2582145B1 (fr) * 1985-05-15 1987-06-19 Alsthom Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature
JPH0382922U (fr) * 1989-12-12 1991-08-23
FR2975836B1 (fr) 2011-05-24 2014-07-04 Schneider Electric Ind Sas Appareillage electrique a isolation gazeuse ayant des moyens de regulation de la pression de gaz
CN103107042A (zh) * 2013-01-22 2013-05-15 上海乐研电气科技有限公司 一种用于寒冷地区的六氟化硫高压断路器

Family Cites Families (9)

* 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
FR1531373A (fr) * 1966-11-03 1968-07-05 Merlin Gerin Disjoncteur à gaz comprimé à circuit fermé
GB1229036A (fr) * 1968-07-23 1971-04-21
DE1943218A1 (de) * 1969-08-20 1971-03-04 Siemens Ag Druckgasschalter
DE2005024C3 (de) * 1970-01-30 1974-10-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Druckgasschalter
JPS4936751A (fr) * 1972-08-10 1974-04-05
DE2249934A1 (de) * 1972-10-12 1974-04-25 Bbc Brown Boveri & Cie Fluessigkeitsarmer leistungsschalter
JPS5113217A (ja) * 1974-07-23 1976-02-02 Shinko Electric Co Ltd Dejitaruyokasetsutoshikijikiteepuno untenseigyohoho
CH619559A5 (en) * 1977-09-28 1980-09-30 Sprecher & Schuh Ag Compressed-gas high-voltage switch for outdoor installation

Also Published As

Publication number Publication date
EP0024542A1 (fr) 1981-03-11
CH641292A5 (de) 1984-02-15
ATE1401T1 (de) 1982-08-15
DE3060706D1 (en) 1982-09-16
JPS5636816A (en) 1981-04-10
CA1140191A (fr) 1983-01-25
ZA805057B (en) 1981-08-26

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