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EP0160853B2 - Disjoncteur à gaz comprimé - Google Patents
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EP0160853B2 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé Download PDF

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Publication number
EP0160853B2
EP0160853B2 EP19850104380 EP85104380A EP0160853B2 EP 0160853 B2 EP0160853 B2 EP 0160853B2 EP 19850104380 EP19850104380 EP 19850104380 EP 85104380 A EP85104380 A EP 85104380A EP 0160853 B2 EP0160853 B2 EP 0160853B2
Authority
EP
European Patent Office
Prior art keywords
chamber
openings
gas circuit
compressed gas
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 - Lifetime
Application number
EP19850104380
Other languages
German (de)
English (en)
Other versions
EP0160853A2 (fr
EP0160853B1 (fr
EP0160853A3 (en
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
Publication of EP0160853B1 publication Critical patent/EP0160853B1/fr
Application granted granted Critical
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 compressed gas switch according to the preamble of patent claim 1.
  • the invention relates to a prior art of pressure gas switches, as described in FR-A-23 85 214.
  • a pressure gas switch with a pressure chamber 22 can be seen from FIG. 10 of FR 23 85 214 A1.
  • the pressure chamber contains, in a coaxial arrangement, two toroidal chambers 9, 10 which are separated from one another by a cylindrical wall carrying a fixed contact 3.
  • the lower end of the chamber 10 is connected to an arc chamber which receives the switching arc when it is switched off and its upper end is connected to the upper end of the chamber 9 via openings 11 in the wall.
  • the lower end of the chamber 9 opens into an annular gap 8 which is delimited by the lower end of the wall and an outflow guide 23 and which is closed in the switched-on state and at the beginning of the switching-off process by a movable contact 4 with respect to the arc chamber.
  • the quenching gas heated by the switching arc therefore initially flows exclusively into the chamber 9 via the chamber 10 and the openings 11.
  • the contact 4 provided for carrying the nominal current is exposed to the oxidizing and corrosive effect of the hot gases led from the arc chamber through the chamber 10.
  • the invention solves the problem of specifying a gas pressure switch of the general type in which the extinguishing gas used for dielectric re-consolidation 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, so that 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 shown in the left part in the switched-on position. on the other hand, in the right part during switching off.
  • a housing filled with an extinguishing gas such as sulfur hexafluoride at a pressure of a few bar
  • an extinguishing gas such as sulfur hexafluoride at a pressure of a few bar
  • 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 in circles running azimuthally about the contact piece 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 switching elements 2 and 3 separate, a switching arc 11 forms between them. In the high current phase, the switching arc heats up the extinguishing gas located in the switching path between switching elements 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.
  • the flow cross-section of the chamber 8 designed as an annular channel need not be larger than the flow cross-section of the annular gap 6, since it is then generally ensured that the flow of the heated extinguishing gas represented by arrows takes place essentially without resistance.
  • 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 are 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 occurs 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 distribution 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 running around the cylinder axis can be evenly spaced from each other, 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 extending 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 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 there is an additional mixing with the unmixed and therefore hot quenching gas located in the chamber 8.

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  • Circuit Breakers (AREA)

Claims (7)

  1. Commutateur à gaz comprimé avec 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 avec une chambre de chauffage (5) s'étendant sur une plus grande longueur en direction axiale qu'en direction radiale, entourant coaxialement les pièces de contact (2, 3), pour recevoir un gaz de soufflage, qui est échauffé lors d'une opération de coupure par un arc électrique de coupure (11) jaillissant entre les deux pièces de contact (2, 3), est conduit dans la chambre de chauffage (5) par un intervalle annulaire (6) délimité par l'extrémité d'une (2) des deux pièces de contact et par un corps en matière isolante (4), y est mélangé avec un gaz de soufflage froid et, après le mélange, est renvoyé à l'arc électrique de coupure (11), dans lequel la chambre de chauffage (5) est divisée, par une cloison de séparation (7) disposée coaxialement par rapport aux pièces de contact (2, 3), en deux chambres (8, 9) de forme toroïdale, dont la chambre interne (8) est reliée à l'intervalle annulaire (6) et la chambre externe (9) est reliée à la chambre interne (8) par des ouvertures (10) percées dans la cloison de séparation (7), ouvertures (10) qui sont disposées sur un cercle orienté en direction azimutale autour de l'axe du cylindre, caractérisé en ce que le chemin, délimité par la pièce de contact (2) et le corps en matière isolante (4), pour le gaz de soufflage après le mélange, ramène de la chambre interne (8) à l'arc électrique de coupure (11), en ce que le corps en matière isolante (4) entoure les chambres interne (8) et externe (9), en ce que les ouvertures (10) sont disposées sur plus de deux cercles orientés en direction azimutale autour de l'axe du cylindre et axialement distants, dont les distances entre les points centraux l'un de l'autre correspondent au maximum au double de la profondeur (d), s'étendant en direction radiale, de la chambre externe (9), en ce que la section d'écoulement de toutes les ouvertures (10) disposées sur un cercle orienté en direction azimutale autour de l'axe du cylindre est environ égale à la section d'écoulement de la chambre interne (8) pour la position axiale correspondant à ce cercle, et en ce que la distance entre des ouvertures (10) voisines correspond au maximum au double de la profondeur (d), s'étendant en direction radiale, de la chambre externe (9).
  2. Commutateur à gaz comprimé suivant la revendication 1, caractérisé en ce que la première chambre (8) est constituée par un canal annulaire s'étendant axialement, avec une profondeur radiale faible comparée à la seconde chambre (9).
  3. Commutateur a gaz comprimé suivant la revendication 2, caractérisé en ce que l'intervalle annulaire (6) débouche dans le canal annulaire environ à égale distance des deux extrémités du canal annulaire.
  4. Commutateur à gaz comprimé suivant la revendication 2, caractérisé en ce que l'intervalle annulaire (6) débouche dans le canal annulaire à une extrémité du canal annulaire.
  5. Commutateur à gaz comprimé suivant la revendication 2, caractérisé en ce que la profondeur radiale de la première chambre (8) diminue, au moins en partie, à partir de l'embouchure de l'intervalle annulaire (6), en regardant en direction axiale.
  6. Commutateur à gaz comprimé suivant l'une des revendications 1 à 5, caractérisé en ce que les ouvertures (10) constituent une fente s'étendant en direction azimutale autour de l'axe du cylindre.
  7. Commutateur à gaz comprimé suivant l'une des revendications 1 à 6, caractérisé en ce que la distance entre les ouvertures (10) en direction axiale correspond environ à la profondeur (d), s'étendant en direction radiale, de la seconde chambre (9).
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
CH2243/84 1984-05-08
CH224384 1984-05-08

Publications (4)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915700C3 (de) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Druckgasschalter mit Verdampfungskühlung
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
CA1096914A (fr) * 1977-03-24 1981-03-03 Masami Kii Coupe-circuit comportant plusieurs chambres et a soufflage d'un fluide extincteur d'arc
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.
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

Also Published As

Publication number Publication date
EP0160853A2 (fr) 1985-11-13
DE3421356A1 (de) 1985-11-14
JPS60243920A (ja) 1985-12-03
JPH0664976B2 (ja) 1994-08-22
EP0160853B1 (fr) 1989-11-29
DE3574520D1 (de) 1990-01-04
EP0160853A3 (en) 1987-07-22

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