EP0204180A1 - Schalter mit Schwefelhexafluorid, funktionierend in einer Umgebung bei sehr niedriger Temperatur - Google Patents

Schalter mit Schwefelhexafluorid, funktionierend in einer Umgebung bei sehr niedriger Temperatur Download PDF

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Publication number
EP0204180A1
EP0204180A1 EP86106465A EP86106465A EP0204180A1 EP 0204180 A1 EP0204180 A1 EP 0204180A1 EP 86106465 A EP86106465 A EP 86106465A EP 86106465 A EP86106465 A EP 86106465A EP 0204180 A1 EP0204180 A1 EP 0204180A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
breaker according
enclosure
condenser
liquid
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
EP86106465A
Other languages
English (en)
French (fr)
Other versions
EP0204180B1 (de
Inventor
Van Doan Pham
Edmond Thuries
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.)
Alstom SA
Original Assignee
Alstom SA
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
Priority claimed from FR8507437A external-priority patent/FR2582145B1/fr
Priority claimed from FR8511717A external-priority patent/FR2585875B2/fr
Priority claimed from FR8601771A external-priority patent/FR2594255B2/fr
Application filed by Alstom SA filed Critical Alstom SA
Priority to AT86106465T priority Critical patent/ATE47503T1/de
Publication of EP0204180A1 publication Critical patent/EP0204180A1/de
Application granted granted Critical
Publication of EP0204180B1 publication Critical patent/EP0204180B1/de
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 present invention relates to a high voltage circuit breaker with sulfur hexafluoride (SF6).
  • SF6 sulfur hexafluoride
  • Circuit breakers of this type are often installed outdoors and may have to operate in an environment with very low temperatures.
  • An object of the invention is to provide a circuit breaker in which no condensation can take place on the side walls of the circuit breaker.
  • Another object of the invention is to provide a circuit breaker in which at least partial evaporation of the condensed gas is ensured to maintain the gas density at a level compatible with proper operation of the circuit breaker.
  • the present invention relates to a high voltage circuit breaker comprising a sealed enclosure in which is disposed a fixed assembly comprising a main contact and an arcing contact and a movable assembly comprising a main contact and an arcing contact, the enclosure being filled with pressurized gas constituted at least partially of sulfur hexafluoride, characterized in that it comprises a condenser arranged outside the circuit breaker, the interior of the condenser being in communication with the interior of the enclosure by at least a first pipe ensuring a gas transfer between the interior of the enclosure and the condenser and by at least a second pipe for transfer the liquefied gas in the condenser to the interior of the enclosure.
  • circuit breakers filled with sulfur hexafluoride also applies to circuit breakers filled with a mixture of sulfur hexafluoride and nitrogen.
  • FIG. 1 we can distinguish, in an insulating envelope 1, preferably made of porcelain, a set of fixed contacts 10 and a movable assembly 20.
  • the envelope is filled with insulating gas which we will assume, for simplicity, to be pure sulfur hexafluoride.
  • the mobile assembly includes a series of contact fingers 21, constituting the main moving contact and cooperating with. the fixed main contact 11 and a series of contact fingers 22 forming the movable arcing contact and cooperating with the fixed arcing contact 12.
  • a blowing nozzle 23 makes it possible to channel the blown gas pushed, at the opening of the circuit breaker, by the fixed piston 24.
  • the circuit breaker is completed by a condenser 30, placed outside the circuit breaker.
  • This condenser is very simply constituted by a metal container, connected by two pipes 31 and 32 outside the circuit breaker.
  • the shape of the container is indifferent (sphere, torus, etc ).
  • the choice of metal and its thickness is such that the internal wall of the condenser can very quickly be brought to a temperature close to the temperature of the external environment.
  • the pipe 31 is of large diameter (5 to 15 cm) and opens at one end towards the wall of the circuit breaker and at the other end towards the middle of the condenser.
  • Line 32 has a smaller diameter of the order of a centimeter and opens at one end to the lowest part of the condenser and at the other end towards the center of the circuit breaker.
  • the main idea of the invention is to promote condensation in a given place when the temperature drops, to avoid condensation on the internal walls of the circuit breaker.
  • condensation preferably occurs in the condenser 30.
  • the gas rises through the duct 31 and partially condenses there.
  • the condensate 33 flows through the conduit 32 towards the interior of the circuit breaker.
  • the conduit 32 opens near the tube 13 supporting the fixed contact 11; this tube 13 is provided with a flange 14 constituting a weir making it possible to obtain the formation of a film of liquid SF6 which flows along the tube 13.
  • this liquid film evaporates which contributes to creating a gas with a higher density of SF6 in the space 25 of the circuit breaker.
  • a notch 16 in the fixed arcing contact makes it possible to facilitate the descent of the gas when the contacts are in the closed position.
  • This notch is made at the neck of the blowing nozzle, shown in broken lines. Through this notch 16 the heavy gas can easily descend to the volume 24A. When the circuit breaker opens following a fault on the network, a high density compressed gas is thus obtained through the nozzle 23.
  • FIG. 2 represents another embodiment of a circuit breaker, according to the invention.
  • the circuit breaker is shown in the closed position.
  • the fixed arcing contact 12A has, towards its end, openings 17, of small diameter, which can be closed by a valve 18 pushed by a spring 19 (FIG. 2A).
  • the cylinder 13A which carries the fixed arcing contact 12A receives a piston 26 mechanically linked by tie rods such as 27 to the moving element 20.
  • the piston 26 is hollow and receives the end of the conduit 32 connected to the condenser 30.
  • the piston 26 is provided with an orifice 26A provided with a normally open valve. The condensate from the condenser flows through the conduit 32 in the piston 26 then through the orifice 26A in the contact 12A.
  • the operation of the circuit breaker is as follows: when the circuit breaker closes, the spring 28 is compressed by the tie rods 27.
  • the liquid SF6 which forms at low outside temperature descends, as said above, in the hollow fixed contact 12A.
  • the spring 28 expands, pushes the piston 26 which compresses the gas below it causing the valve 18 to open and the SF6 to be sprayed, in the form of mist, in the arc zone .
  • This high density SF6 mist promotes cutting.
  • the valve 26A closes due to the increase in pressure in the cut-off chamber and prevents the gas from going up in the condenser.
  • tie rods such as 27 will no longer be necessary.
  • FIG. 3 represents an alternative embodiment of a circuit breaker of the type comprising a movable assembly with main contact 51 and arcing contact 52 and a fixed assembly comprising a fixed main contact 61 and a series of fingers 62 forming a fixed arcing contact.
  • a nozzle 63 and a deflector 64 delimit a chamber 65 in which the gas heats up and rises in pressure under the effect of the arc formed during a separation of the arcing contacts.
  • a piston 66 mechanically linked to the mobile assembly, or provided with own displacement means, pushes, during the opening of the circuit breaker, a fresh gas through an annular conduit formed by the deflector 64 and the contacts 62.
  • a condenser 70 is arranged outside the circuit breaker and connected by two conduits 71 and 72 outside the circuit breaker.
  • the conduit 71 of larger diameter than the conduit 72, opens into the circuit breaker on the side of the porcelain wall.
  • the conduit 72 of smaller diameter opens into the chamber 65.
  • the condenser shown is of toroidal shape.
  • a valve 75 closes when the pressure in the chamber 65 increases beyond a given limit and then prevents any communication between the condenser 70 and the chamber 65.
  • the nozzle 63 is advantageously curved to form a gutter to collect the liquid SF6 which flows along the wall of the chamber 65.
  • the heat released by the arc vaporizes this SF6 whose vapor pressure then increases locally, thus promoting the cut.
  • the arc is extinguished by blowing the compressed SF6 into the enclosure 66A using the piston 66.
  • FIG. 4 shows an overall view of a circuit breaker comprising, above the breaking chamber 100, a toric condenser 101, with its gas supply pipes 102 and its liquid pipes 103.
  • Column 105 contains the circuit-breaker operating linkage and chamber 106 its operating mechanism.
  • a second condenser 108 is placed, collecting the gaseous or already liquefied SF6.
  • the condensate is vaporized by a heating member 109 and reinjected inside the circuit breaker.
  • the heating energy supplied by the member 109 can be either electrical energy or thermal energy from the ground. At 1 or 2 meters in the ground, the temperature is sufficient to evaporate the liquid SF6 at - 50 ° C from 108.
  • All these variants aim to collect the liquid SF6 formed during the closing or opening periods of the circuit breaker in an area close to the arcing zone, and, when the circuit breaker opens, to spray and spray this liquid, using compressed gas, on the arch.
  • the reference 120 designates an insulating ceramic envelope of a circuit breaker sealed in a sealed manner by two end flanges 121 and 122, defining a sealed enclosure 123 filled with sulfur hexafluoride (SF6) under a pressure of a few bars.
  • SF6 sulfur hexafluoride
  • a set of contacts fixed comprising a main tubular contact 124 and an arcing contact 126.
  • the latter are provided with spark arrestors 128.
  • the fingers 126 and the spark arrestor are carried by a crown 125 fixed to the tube 124.
  • An insulating blowing nozzle 129 extends the tube 124.
  • the movable assembly comprises a tubular arcing contact 127 at the end of a tube 130 connected to an actuator not shown.
  • the tube loses a ring 131 of contact fingers 132, cooperating, when the circuit breaker is closed, with the fixed main contact 124.
  • the tube 130 slides in the flange 122; sealing is ensured by a seal 134.
  • the fixed assembly also comprises two tubes coaxial with each other and with tube 124.
  • One 135 is fixed to the flange 121, the other 136 is arranged in the extension of the fixed arcing contacts.
  • the two tubes 124 and 136 define an annular volume 137 in which a piston 138 slides in leaktight fashion.
  • the latter is carried by a tube 139 fixed to a crown 140 sliding, in a guided manner, inside the tube 135.
  • the crown 140 is fixed to the tube 139 by arms 141 passing through slots 142 of the tube 124.
  • a spring 143 disposed between the flange 121 and the piston 138, exerts on the latter a force tending to move the piston towards the arcing contacts.
  • a casing 144 made of insulating material with very good resistance to pressure such as epoxy glass, surrounds the arc zone. It is fixed on one side to the crown 140 and on the other side to a ring 145 sliding, in a guided manner, in a tube 146 fixed to the flange 122.
  • the circuit breaker is provided with a condenser 150 disposed outside of the circuit breaker and above it.
  • the condenser is connected to the circuit breaker by a pipe 151 ensuring a transfer of gas between the interior of the circuit breaker and the condenser.
  • a pipe 152 extended by a tube 153 opening out under the flange 121, allows the flow towards the interior of the circuit breaker of the liquid formed in the condenser.
  • the liquid passes into the volume 155, surmounting the piston 138, crosses the latter by channels 138A or by valves and reaches the volume 137.
  • the crown 125 is provided with valves 125A 'which open when the pressure in the volume 137 reaches a certain threshold.
  • a screen 125C contains the liquid of volume 137 to prevent it from flowing through the passages 125B passing through the crown 125.
  • the screen 125C defines with the adjacent parts a container 137A.
  • the circuit breaker works as follows.
  • the spring 143 is bandaged under the action of the envelope pushed by a ring 156 secured to the tubular contact 130 and coming to bear against the ring 145.
  • the SF6 gas condenses in the condenser 150 when the ambient temperature drops for example from -20 ° C to -50 ° C.
  • the liquid SF6 falls into the volume 155 through the tube 153, then passes through the small holes 138A (or the valves) to be stored in the container 137A.
  • the rod 130 is operated (towards the bottom of the figure).
  • the piston 138 compresses the gas in volume 137.
  • the valves 125A open when the pressure in volume 137 reaches a given threshold.
  • the compressed gas in the volume 137 leaves with the liquid SF6 to mix well in the enclosure 157 surrounding the arcing contacts.
  • the energy of the arc 158 and the compression energy of the movable piston 138 produce a very rapid rise in the temperature of this high density SF6 mixture and bring it to a high pressure.
  • the passages 125B in the crown 125 facilitate the filling of SF6 with volume 137 during the closing maneuver by sucking up the SF6 in volume 157.
  • the mobile contact 130 rises and drives the insulating envelope 144.
  • the movable contact 130 descends with a speed which may be greater than that of the casing 144 and of the piston 138.
  • the relaxation of the spring 143 makes it possible to compress the gas in the volume 137.
  • the use of the insulating envelope 144, and cylinders 135 and 146 makes it possible to dynamically separate the pressures of the enclosures 123 (outside the envelope) and 160.
  • the volume of the enclosure 123 is much lower than that of the enclosure 160.
  • the porcelain casing 120 of the circuit breaker breaks, the low value of the volume 123 prevents a violent explosion of the porcelain 120.
  • the gas in volume 160 slowly escapes to the atmosphere through the play of the guides of the rings 140 and 145, which offer a deliberately imperfect seal.
  • the upper plate 121 and the other parts which are fixed to it remain attached to the lower plate 122 and to the movable contact 130 by means of the arms 141, the casing 144 and the stop 146A of tube 146.
  • a safety membrane 161 When the pressure in the enclosure 160 rises too high, for example following a non-cut or an ignition between contacts, a safety membrane 161 operates.
  • a deflector 162 prevents the projection of the pieces of the membrane 161.
  • the presence of the insulating envelope 144 protects the porcelain 120 against rapid increases in pressure.
  • FIG. 7 shows another alternative embodiment of the invention.
  • the elements common to FIGS. 5 to 7 have been given the same reference numbers.
  • the condenser 150 with its tubes 151 and 152.
  • the set of fixed contacts comprises a tubular main contact 172 and an arcing contact 173 in the form of a rod fixed by the radial arms 174.
  • the moving element comprises a tube 175 carrying arcing contact fingers 176.
  • a crown 177 connects the tube 175 with a tube 178.
  • This tube carries a crown 179 on which are arranged main movable contacts 180, a spark arrester 181 and an insulating blowing nozzle 182.
  • the dashed lines show the position of the nozzle 182 and that of the arcing fingers 176 when the circuit breaker is closed.
  • Crowns 177 and 179 define a volume 183.
  • the crown 177 carries valves 177A and passages 177B.
  • a fixed annular piston 184 carried by a tubular rod 185 completes the breaking chamber.
  • the piston 184 defines with the crown 177 a volume to be compressed 186.
  • the liquid SF6 flowing through the tube 171 is collected in the funnel constituted by the nozzle 182, flows along the internal surface of this nozzle and then collects in the container 183A defined by the screen 183B and the adjacent walls.
  • the walls of the container 183A can be provided with thermal insulation.
  • the holes 177B facilitate the filling of the volume 186 when the circuit breaker closes.
  • FIG. 8 represents a circuit breaker identical to that of FIG. 7 further comprising a small tank 190 provided with openings 190A which when the circuit breaker is in the open position, are closed by a valve 191 pushed by a spring 192.
  • the piston 184 carries valves 184A making it possible to facilitate the filling of SF6 when the circuit breaker closes.
  • FIG. 8 makes it possible to collect, during the opening periods of the circuit breaker, a certain amount of liquid SF6 which remains placed above the arc zone and which, when closed, will fill the volume 183; with this arrangement, the SF6 does not fall into the volume 183 when the circuit breaker is in the "open" position.
  • Figures 9 and 10 relate to two other embodiments.
  • These embodiments also aim to collect the liquefied gas formed during the closing or opening periods of the circuit breaker in an area close to the arcing zone, and, when the circuit breaker opens, to spray and spray this liquid using compressed SF6 gas, on the arc.
  • This mobile assembly is enveloped by an external tube 178 of which the end constitutes a spark arrester 181.
  • This mobile assembly comprises an internal tube 175, provided at its end with a crown 179 fitted in the external tube 178, a fixed annular piston 184 carried by a tubular rod 185, an insulating blowing nozzle 182, and an annular reservoir 333 integral of the crown 179 by means of rods 334.
  • the main contact 180 and the arcing contact 176 are carried by the crown 179.
  • An annular space 331 is formed between the main contact 180 and the nozzle 182, and an orifice 332, formed in the crown 179, places the annular space 331 in communication with the reservoir 333 covered by a grid 341.
  • the crown 179 also includes orifices 337 putting the reservoir 333 into communication with an annular space 336 internal to the insulating nozzle 182.
  • the flange 121 receives a bell-shaped condenser 300 with or without cooling fins.
  • a transfer pipe 301 fulfills the role of the first pipe ensuring a transfer of gas between the interior of the enclosure and the condenser.
  • the condenser contains an insulating enclosure 310 separated by a partition 313, to form two equal or unequal compartments 311, 312.
  • the compartment 311 is connected to the orifice 302A by a siphon 303, this orifice being extended by a tube 304, and the compartment 312 is in direct communication with the orifice 302B.
  • the tubular contact 172 comprises a gutter 340 and an annular reservoir 338 constituted by an annular partition.
  • the dashed lines show the position of the nozzle 182 and that of the arcing contact 176 when the circuit breaker is closed.
  • the SF6 gas condenses in the condenser 300. This condensation causes the pressure to drop slightly and there is therefore a call for gas from the enclosure to the condenser through line 301.
  • the SF6 liquid is stored in the insulating enclosure 310, therefore in the two compartments 311, 312.
  • the SF6 liquid When the SF6 liquid reaches a certain level, it is transferred from the compartment 311 into the space 331 via the siphon 303 of the orifice 302A and the tube 304, and through the orifice 332 into the reservoir 333. From even, the liquid SF6 is transferred from the compartment 312 into the reservoir 338 through the orifice 302B and through the gutter 340.
  • the SF6 liquid is projected, by the acceleration effect of the movable contact, against the crown 179 and driven by the SF6 gas compressed in the cylinder towards the internal space 336 through the orifices 337.
  • the gas arrives at the neck of the nozzle 182 in the form of a mist.
  • a fine mesh 341 is used, and to better conserve the liquid SF6 in the reservoir 333, the latter is thermally isolated from the other surrounding metal parts.
  • This reservoir 333 and its fixing rods 334 can be replaced by only a flexible accordion container fixed to the crown 179.
  • the reservoir 333 and the rods 334 can be replaced by a flexible accordion-type reservoir and, when triggered, provide for this flexible reservoir to strike the piston 184 at the end of the stroke.
  • the elements common to the two embodiments are recognized, as regards the fixed assembly, the main contact 172, the arcing contact 173 fixed by radial arms 174, as regards the assembly mobile, the outer tube 178, the inner tube 175 have at its end the crown 179, the tubular rod 185 carrying the fixed piston 184, the blowing nozzle 182 and the arcing contact 176, then as regards the condenser 300 the transfer line 301, the two small transfer lines 302A, 302B, the tube 304, the enclosure insulation 310 provided with two compartments 311, 312.
  • the interior of the arcing contact 173 constitutes a reservoir 317 connected to the compartment 312 of the insulating enclosure 310 by the orifice 302B and by a tube 305.
  • the top of the reservoir 317 has an opening 318 which allows better contact with the surrounding gas during the vaporization of the SF6 liquid.
  • the main contact 180 is not installed on the mobile assembly but on the fixed assembly, at the end of the main contact 172, this contact 180 coming to bear on an end shoulder of the tube 178.
  • the liquid reservoir is placed inside the insulating nozzle 182, this reservoir 320, constituted by a partition 321, being in communication with the free space between crown 179 and piston 184, by means of valves 177A, this free space being in permanent communication with an annular space 336 by means of orifices 337.
  • the insulating nozzle 182 has an orifice 322 which makes it possible to supply the reservoir 320 with SF6 liquid.
  • a fine mesh 323 is placed at the top of the tank 320 to promote the spraying of the SF6 liquid.
  • valves 177A allow, thanks to the compressed SF6, to quickly inject and spray the SF6 liquid towards the arc zone. Compressed SF6 gas also passes through orifices 337.

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  • Circuit Breakers (AREA)
EP86106465A 1985-05-15 1986-05-13 Schalter mit Schwefelhexafluorid, funktionierend in einer Umgebung bei sehr niedriger Temperatur Expired EP0204180B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86106465T ATE47503T1 (de) 1985-05-15 1986-05-13 Schalter mit schwefelhexafluorid, funktionierend in einer umgebung bei sehr niedriger temperatur.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
FR8507437A FR2582145B1 (fr) 1985-05-15 1985-05-15 Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature
FR8507437 1985-05-15
FR8511717 1985-07-31
FR8511717A FR2585875B2 (fr) 1985-05-15 1985-07-31 Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature
FR8601771 1986-02-10
FR8601771A FR2594255B2 (fr) 1985-05-15 1986-02-10 Disjoncteur a hexafluorure de soufre fonctionnant dans un environnement a tres basse temperature.

Publications (2)

Publication Number Publication Date
EP0204180A1 true EP0204180A1 (de) 1986-12-10
EP0204180B1 EP0204180B1 (de) 1989-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106465A Expired EP0204180B1 (de) 1985-05-15 1986-05-13 Schalter mit Schwefelhexafluorid, funktionierend in einer Umgebung bei sehr niedriger Temperatur

Country Status (7)

Country Link
US (1) US4698469A (de)
EP (1) EP0204180B1 (de)
JP (1) JPH0610949B2 (de)
CN (1) CN1006112B (de)
BR (1) BR8602189A (de)
CA (1) CA1245693A (de)
DE (1) DE3666521D1 (de)

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JP4612407B2 (ja) * 2004-12-22 2011-01-12 株式会社東芝 開閉装置
DE502005009041D1 (de) 2005-09-26 2010-04-01 Abb Technology Ag Hochspannungsschalter mit verbesserter Schaltleistung
EP1947669A1 (de) * 2007-01-17 2008-07-23 Abb Research Ltd. Pol für einen gasinsolierten Hochspannungsschalter und Verfahren zur Herstellung eines solchen Schalterpols
EP2791959B1 (de) 2011-12-13 2016-03-09 ABB Technology AG Schutzschalter mit flüssigkeitsinjektion
FR3023649B1 (fr) * 2014-07-08 2016-08-19 Alstom Technology Ltd Disjoncteur utilisant l'etat diphasique d'un gaz pour ameliorer les proprietes de coupure
CN108987172B (zh) * 2018-09-19 2020-05-29 国网黑龙江省电力有限公司电力科学研究院 一种用于低温地区柱式断路器的外部长期加热装置
CN111725024B (zh) * 2020-06-29 2022-10-18 西安西电开关电气有限公司 一种高压断路器及其灭弧室
CN114068242A (zh) * 2020-08-06 2022-02-18 河南平芝高压开关有限公司 一种小型化断路器
CN112002605B (zh) * 2020-08-25 2022-08-12 西安西电开关电气有限公司 一种开关设备及其灭弧室
CN113690093B (zh) * 2021-08-25 2023-01-24 西安西电开关电气有限公司 断路器

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US3846602A (en) * 1971-10-05 1974-11-05 Siemens Ag Dual-pressure high-voltage compressed-gas insulated electric circuit breaker
DE2248116A1 (de) * 1972-09-28 1974-04-04 Siemens Ag Hochspannungs-leistungsschalter mit einem gasfoermigen loesch- und isoliermittel
US3985987A (en) * 1975-07-31 1976-10-12 Allis-Chalmers Corporation Means for recycling liquified insulating gas in a gas insulated circuit breaker
FR2400251A1 (fr) * 1977-08-10 1979-03-09 Merlin Gerin Disjoncteur haute tension a autosoufflage
EP0024542A1 (de) * 1979-08-30 1981-03-11 Sprecher & Schuh AG Druckgasschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018054677A1 (de) * 2016-09-23 2018-03-29 Siemens Aktiengesellschaft Vakuumschalter
CN109716475A (zh) * 2016-09-23 2019-05-03 西门子股份公司 真空开关
RU2707172C1 (ru) * 2016-09-23 2019-11-25 Сименс Акциенгезелльшафт Вакуумный выключатель
US10748723B2 (en) 2016-09-23 2020-08-18 Siemens Aktiengesellschaft Vacuum switch
CN109716475B (zh) * 2016-09-23 2021-09-03 西门子股份公司 真空开关

Also Published As

Publication number Publication date
US4698469A (en) 1987-10-06
CN86103295A (zh) 1986-11-12
JPH0610949B2 (ja) 1994-02-09
BR8602189A (pt) 1987-01-13
DE3666521D1 (en) 1989-11-23
EP0204180B1 (de) 1989-10-18
CN1006112B (zh) 1989-12-13
JPS61269822A (ja) 1986-11-29
CA1245693A (fr) 1988-11-29

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