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EP0160853B1 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé Download PDF

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Publication number
EP0160853B1
EP0160853B1 EP19850104380 EP85104380A EP0160853B1 EP 0160853 B1 EP0160853 B1 EP 0160853B1 EP 19850104380 EP19850104380 EP 19850104380 EP 85104380 A EP85104380 A EP 85104380A EP 0160853 B1 EP0160853 B1 EP 0160853B1
Authority
EP
European Patent Office
Prior art keywords
chamber
gas circuit
compressed gas
breaker according
openings
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
EP19850104380
Other languages
German (de)
English (en)
Other versions
EP0160853B2 (fr
EP0160853A3 (en
EP0160853A2 (fr
Inventor
Friedrich Dr. Pinnekamp
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0160853A2 publication Critical patent/EP0160853A2/fr
Publication of EP0160853A3 publication Critical patent/EP0160853A3/de
Application granted granted Critical
Publication of EP0160853B1 publication Critical patent/EP0160853B1/fr
Publication of EP0160853B2 publication Critical patent/EP0160853B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Definitions

  • the invention is based on a gas pressure switch according to the preamble of claim 1.
  • the invention relates to a prior art of gas pressure switches, as described in EP-A-0 067 460.
  • the quenching gas heated by the switching arc is stored in a toroidal heating chamber which coaxially surrounds the switching elements and flows into an annular space when the heating effect of the arc diminishes when the current zero crossing is approached.
  • this annular space it is mixed with fresh extinguishing gas from a piston-cylinder compression device, so that the mixed gas has a lower temperature than the heated extinguishing gas.
  • the quenching gas which has been mixed down to a comparatively low temperature, is then passed into the switching path between the two switching elements, where it effectively blows the switching arc.
  • such a switch is relatively complex and also requires additional drive energy to drive the compression device.
  • the invention solves the problem of specifying a compressed gas switch of the generic type in which the extinguishing gas used for the dielectric reconsolidation of the switching path is available at the end of the high current phase at a gas temperature which is considerably lower than the temperature of the heated extinguishing gas, saving on a compression device.
  • the compressed gas switch according to the invention is characterized in that the heated extinguishing gas and the cool extinguishing gas stored in the heating chamber before the switching process are mixed almost optimally, as a result of which sufficiently cooled extinguishing gas is available for the dielectric reconsolidation of the switching path after the zero current passage.
  • a heating chamber which is advantageous for cost considerations and design reasons and which extends predominantly in the axial direction.
  • the single figure shows a plan view of a compressed gas switch designed according to the invention and cut along its contact piece axis.
  • the pressure gas switch designed according to the invention is indicated in the left-hand part in the switched-on position, but in the right-hand part during the switching off.
  • a housing filled with an extinguishing gas such as sulfur hexafluoride at a pressure of a few bar.
  • this housing 1 there is a switching piece 2 designed as a fixed nozzle tube, into which a movable, fully cylindrical switching piece 3 is inserted in the switched-on position.
  • the switching piece 3 passes through an opening (not designated) of an insulating material body 4 which is designed as a nozzle and which is attached to the switching piece 2.
  • the heating chamber 5 In the insulating body 4 there is a heating chamber 5 surrounding the switching pieces 2 and 3 in a toroidal shape, which is delimited on the inside by the switching piece 2 and has an annular gap 6 between the insulating body 4 and the upper end of the switching piece 2, which in the switched-on position by the switching piece 3 is separated from the inside of the switching piece 2.
  • the heating chamber has an extension L in the axial direction which is several times greater than its depth D in the radial direction.
  • the chamber 8 is enclosed by the chamber 9 and is connected to it via openings 10 in the partition 8.
  • the chamber 8 has a comparatively small depth in the radial direction and opens into the annular gap 6.
  • the openings 10 are arranged on circles running azimuthally around the contact element axis, the center distances of which from one another in the axial direction are approximately the depth d extending in the radial direction correspond to the external chamber 9.
  • this switch When switching off (right part of the figure), the switching piece 3 is moved upwards. As soon as the switching pieces 2 and 3 separate, a switching arc 11 is formed between them. In the high current phase, the switching arc heats up the extinguishing gas located in the switching path between the switching pieces 2 and 3, causing its pressure to rise. The heated extinguishing gas of high pressure flows through the annular gap 6, which is comparatively large compared to the opening of the switching element 2, into the heating chamber 5 and is guided there in the chamber 8 along the partition wall 7 to the upper and lower ends of the chamber 8 delimited by the insulating body 4.
  • a particularly favorable course of the flow is achieved when the radial depth of the first chamber 8 at least partially decreases in the axial direction from the mouth of the annular gap 6.
  • the annular gap 6 acting as the inlet opening of the heating chamber 5 is approximately the same distance from the upper and removed the lower end of the heating chamber 5 or the chamber 8, the flow cross-section of the chamber 8 can even be kept considerably smaller than the flow cross-section of the annular gap 6, since in this case the extinguishing gas flow is divided into two approximately equal partial flows, which along the Move partition 7 towards the top and bottom of chamber 8.
  • the heated extinguishing gas guided along the partition 7 mixes only insignificantly with the cool extinguishing gas located in the chamber 8 and urges it essentially through the openings 10 into the outer chamber 9.
  • the openings 10 are dimensioned so that the pressure equalization between the chambers 8 and 9 takes place very quickly even when the extinguishing gas is heated up strongly as a result of high currents to be interrupted. Accordingly, it is generally sufficient if the partition 7 is at most a few millimeters thick.
  • a favorable division of the inflowing heated extinguishing gas is achieved when the flow cross section of the openings 10 arranged on an azimuthally extending around the cylinder axis is approximately equal to the flow cross section of the chamber 8 at the axial position of the chamber 8 assigned to this circle.
  • the heated extinguishing gas flows through the openings 10 into the chamber 9, where it mixes with the extinguishing gas located there before the pressure equalization.
  • mixture boundaries 12, 13 and 14 between cool and mixed extinguishing gas migrate into the chamber 9 from the openings 10.
  • the openings located on azimuthally extending around the cylinder axis can be evenly spaced from one another, but can also be designed as a gap running azimuthally around the cylinder axis.
  • the partition 10 can then be fastened by means of webs which extend radially outwards to the wall of the insulating body 4 which limits the heating chamber 5 to the outside.
  • the cooled, quenching gas mixed in the chamber 9 flows back through the openings 10 via the ring channel-like chamber 8 and the ring channel 6 back into the switching path and interrupts the arc 11.
  • the quality of the quenching gas acting on the switching path is thereby further improved that when it flows out of the openings 10 an additional mixing with the unmixed and therefore hot quenching gas located in the chamber 8 takes place.

Landscapes

  • Circuit Breakers (AREA)

Claims (10)

1. Disjoncteur à gaz comprimé comportant deux pièces de contact (2, 3) de forme cylindrique, mobiles l'une par rapport à l'autre le long de l'axe du cylindre et une chambre chaude (5) entourant coaxialement les pièces de contact (2, 3) et s'allongeant davantage dans le sens axial que dans le sens radial, pour recevoir du gaz d'extinction qui, dans le cas d'une opération de disjonction, est chauffé par un arc électrique de coupure (11) jaillissant entre les deux pièces de contact (2, 3), est amené par l'intermédiaire d'un espace annulaire (6) dans la chambre chaude (5) et y est mélangé à du gaz d'extinction froid, caractérisé en ce que la chambre chaude (5) est divisée par une cloison de séparation (7) disposée coaxialement aux pièces de contact (2, 3) en deux chambres de forme torique (8, 9), une première (8) de ces deux chambres (8, 9) étant en communication avec l'espace annulaire (8) et une seconde (9) de ces deux chambres (8, 9) étant en communication par des lumières (10) dans la cloison de séparation (7) avec la première chambre (8).
2. Disjoncteur à gaz comprimé suivant la revendication 1, caractérisé en ce que la première chambre (8) a la forme d'un canal annulaire qui s'étend axialement et qui possède une profondeur radiale faible par rapport à celle de la seconde chambre (9).
3. Disjoncteur à gaz comprimé suivant la revendication 2, caractérisé en ce que l'espace annulaire (6) s'ouvre dans le canal annulaire à peu près à égale distance des deux extrémités de ce dernier.
4. Disjoncteur à gaz comprimé suivant la revendication 2, caractérisé en ce que l'espace annulaire (6) s'ouvre dans le canal annulaire à une extrémité de ce dernier.
5. Disjoncteur à gaz comprimé suivant la revendication 2, caractérisé en ce que la profondeur radiale de la première chambre (8) va en diminuant au moins partiellement dans le sens axial à partir de l'orifice de l'espace annulaire (6).
6. Disjoncteur à gaz comprimé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la distance séparant des lumières (10) voisines est tout au plus égale au double de la profondeur radiale (d) de la seconde chambre (9).
7. Disjoncteur à gaz comprimé suivant la revendication 6, caractérisé en ce que les lumières (10) sont disposées sur des cercles azimutaux s'étendant autour de l'axe du cylindre, les espacements des centres de ces cercles correspondant tout au plus au double de la profondeur (d) de la seconde chambre (9) dans le sens radial.
8. Disjoncteur à gaz comprimé suivant la revendication 7, caractérisé en ce que les lumières (10) ont la forme de fentes azimutales entourant l'axe du cylindre.
9. Disjoncteur à gaz comprimé suivant la revendication 7 ou 8, caractérisé en ce que la section d'écoulement de toutes les lumières (10) disposées sur un cercle azimutal autour de l'axe du cylindre est à peu près égale à la section d'écoulement du canal annulaire de la première chambre (8) à l'endroit axial du canal annulaire correspondant à ce cercle.
10. Disjoncteur à gaz comprimé suivant l'une quelconque des revendications 6 à 9, caractérisé en ce que l'espacement des lumières (10) dans le sens axial correspond environ à la profondeur (d) de la seconde chambre (9) dans le sens radial.
EP19850104380 1984-05-08 1985-04-11 Disjoncteur à gaz comprimé Expired - Lifetime EP0160853B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH224384 1984-05-08
CH2243/84 1984-05-08

Publications (4)

Publication Number Publication Date
EP0160853A2 EP0160853A2 (fr) 1985-11-13
EP0160853A3 EP0160853A3 (en) 1987-07-22
EP0160853B1 true EP0160853B1 (fr) 1989-11-29
EP0160853B2 EP0160853B2 (fr) 1995-05-17

Family

ID=4229202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850104380 Expired - Lifetime EP0160853B2 (fr) 1984-05-08 1985-04-11 Disjoncteur à gaz comprimé

Country Status (3)

Country Link
EP (1) EP0160853B2 (fr)
JP (1) JPH0664976B2 (fr)
DE (2) DE3421356A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915700A1 (de) * 1989-05-13 1990-11-22 Licentia Gmbh Selbstblasschalter mit verdampfungskuehlung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907092U1 (de) * 1989-06-07 1989-08-10 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
FR2715497B1 (fr) * 1994-01-25 1996-02-16 Gec Alsthom T & D Sa Buse de disjoncteur à chambre d'expansion thermique.
DE19512652C1 (de) * 1995-04-05 1996-10-31 Aeg Energietechnik Gmbh Leistungsschalter
DE102011007103A1 (de) * 2011-04-11 2012-10-11 Siemens Aktiengesellschaft Elektrisches Schaltgerät
CN112017904B (zh) * 2019-05-28 2022-08-12 河南平芝高压开关有限公司 断路器及其静侧尾部气流通道结构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076494A5 (fr) * 1970-01-16 1971-10-15 Alsthom Cgee
DE2633093C2 (de) * 1976-07-20 1987-04-30 Siemens AG, 1000 Berlin und 8000 München Elektrischer Leistungsschalter mit einer geschlossenen, mit Löschgas gefüllten Löschkmammer
DE2811510C2 (de) * 1977-03-24 1983-03-24 Mitsubishi Denki K.K., Tokyo Elektrischer Druckgasschalter
CH632609A5 (de) * 1977-03-24 1982-10-15 Mitsubishi Electric Corp Stromunterbrecher mit lichtbogenloeschendem gas.
CA1096914A (fr) * 1977-03-24 1981-03-03 Masami Kii Coupe-circuit comportant plusieurs chambres et a soufflage d'un fluide extincteur d'arc
JPS54122881A (en) * 1978-03-17 1979-09-22 Mitsubishi Electric Corp Switchgear
FR2520928A1 (fr) * 1982-02-04 1983-08-05 Alsthom Atlantique Disjoncteur a auto-soufflage pneumatique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915700A1 (de) * 1989-05-13 1990-11-22 Licentia Gmbh Selbstblasschalter mit verdampfungskuehlung

Also Published As

Publication number Publication date
JPS60243920A (ja) 1985-12-03
JPH0664976B2 (ja) 1994-08-22
DE3574520D1 (de) 1990-01-04
EP0160853B2 (fr) 1995-05-17
EP0160853A3 (en) 1987-07-22
DE3421356A1 (de) 1985-11-14
EP0160853A2 (fr) 1985-11-13

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