SE466979B - SELF-Blow type high voltage switch - Google Patents
SELF-Blow type high voltage switchInfo
- Publication number
- SE466979B SE466979B SE9002885A SE9002885A SE466979B SE 466979 B SE466979 B SE 466979B SE 9002885 A SE9002885 A SE 9002885A SE 9002885 A SE9002885 A SE 9002885A SE 466979 B SE466979 B SE 466979B
- Authority
- SE
- Sweden
- Prior art keywords
- chamber
- compression chamber
- pressure
- switch
- pressure collection
- Prior art date
Links
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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/905—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the compression volume being formed by a movable cylinder and a semi-mobile piston
-
- 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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume
-
- 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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
Landscapes
- Circuit Breakers (AREA)
Description
X; 466 979 REDOGÖRELSE FÖR UPPFINNINGEN Huvudändamälet med föreliggande uppfinning är att vid en pufferbrytare av självblåsande typ förbättra brytförmågan i det andra frånslaget i en från-till/från-operation. Detta uppnås enligt uppfinningen genom den i kännetecknande delen av patentkrav 1 angivna åtgärden. X; DISCLOSURE OF THE INVENTION The main object of the present invention is to improve the breaking capacity of the second cut-off in a off-on / off operation in a self-blowing buffer breaker. This is achieved according to the invention by the measure stated in the characterizing part of claim 1.
Vid en brytare enligt uppfinningen vilar puffervolymens blåskolv på en eller flera fjädrar som är anpassade till styrka och förspänning på ett sådant sätt att vid ett visst övertryck i puffervolymen kommer pufferkol- ven att röra sig en förutbestämd sträcka och puffervolymen blir därmed temporärt större. I slutet av frånmanövern då den mellan puffervolymen och självblåsvolymen anordnade backventilen öppnar och övertrycket i puffer- volymen sjunker, kommer kolven att göra en återgående rörelse varvid en gaspuff trycks in i självblåsvolymen. Denna extra gaspuff som alltså åstadkommas med hjälp av den rörliga kolven är ett viktigt tillskott till gasmassan i självblåsvolymen, i vilken temperaturen sänks väsentligt, varvid brytförmågan i det andra frànslaget i en från-till/från-manöver kraftigt förbättras.In a switch according to the invention, the blue piston of the buffer volume rests on one or more springs which are adapted to strength and prestress in such a way that at a certain overpressure in the buffer volume the buffer piston will move a predetermined distance and the buffer volume will thus be temporarily larger. At the end of the maneuver when the non-return valve arranged between the buffer volume and the self-blowing volume opens and the overpressure in the buffer volume decreases, the piston will make a reciprocating movement, a gas puff being pressed into the self-blowing volume. This extra gas puff, which is thus produced by means of the movable piston, is an important addition to the gas mass in the self-blowing volume, in which the temperature is lowered considerably, whereby the breaking capacity of the second switch-off in a from-to-from maneuver is greatly improved.
Det är i och för sig tidigare känt att i pufferbrytare, som inte är för- sedda med självblåsvolym, anordna blåskolven axiellt förskjutbar mot ver- kan av en fjäder, se t ex patentpublikationerna DE 2 363 171 och SE 471 032. Den fjädrande kolven vid de kända konstruktionerna har dock en helt annan funktion än vid föreliggande uppfinning. Vid de kända konstruk- tionerna syftar den fjädrande kolven dels till att åstadkomma en snabbare tryckökning i puffercylindern, dels till att reducera det maximala trycket i cylindern och ge en jämnare tryckfördelning under en längre tid.It is per se previously known that in buffer switches, which are not provided with self-blowing volume, the blowing piston is arranged axially displaceable against the action of a spring, see for example the patent publications DE 2 363 171 and SE 471 032. The resilient piston at however, the known constructions have a completely different function than in the present invention. In the known constructions, the resilient piston aims partly to achieve a faster increase in pressure in the buffer cylinder, partly to reduce the maximum pressure in the cylinder and give a more even pressure distribution over a longer period of time.
BEsrmIvNING Av UTFönINGsExmEL Uppfinningen skall förklaras närmare genom beskrivning av ett utförings- -exempel under hänvisning till bifogade ritningsfigur, som visar den centrala delen av en enligt uppfinningen utförd högspänningsbrytare i axialsnitt. Figurdelen till vänster om mittlinjen visar brytaren i till- läget, medan figurdelen till höger om mittlinjen visar brytaren i från- läget. 3 466.979' Den i ritningen visade brytaren har ett gastätt hölje 1 som åtminstone delvis består av isolermaterial och som innehåller en fast pluggformig ljusbågskontakt 2 och en axiellt rörlig hylsformig ljusbågskontakt 3. Den rörliga kontakten 3 är via en rörformig kontaktstång 4 och en isolerande manöverstång (ej visad) kopplad till ett manöverdon av exempelvis det utförande som beskrivits i svenska patentansökningen 9001116-4. Med hjälp av manöverdonet kan den rörliga kontakten förskjutas mellan det till vänster i figuren visade tilläget och det till höger i figuren visade franläget . ~ i Den rörliga kontakten 3 uppbär en av metall utförd hålcylinder 5 som innesluter ett tryckuppsamlingsrum 6, vars volym är konstant, ett komp- ressionsrum 7, samt en elektriskt isolerande blåsdysa 8 med en ringformig kanal 9, som förbinder tryckuppsamlingsrummet 6 med det område där ljus- bågen brinner vid en frånmanöver. Hålcylindern 5 utgör brytarens rörliga driftströmskontakt, vilken samverkar med en fast driftströmskontakt 10.DESCRIPTION OF THE INVENTION EXAMPLE The invention will be explained in more detail by describing an exemplary embodiment with reference to the accompanying drawing figure, which shows the central part of a high-voltage circuit breaker according to the invention in axial section. The figure part to the left of the center line shows the switch in the off position, while the figure part to the right of the center line shows the switch in the off position. The switch shown in the drawing has a gas-tight housing 1 which at least partly consists of insulating material and which contains a fixed plug-shaped arc contact 2 and an axially movable sleeve-shaped arc contact 3. The movable contact 3 is via a tubular contact rod 4 and an insulating control rod ( not shown) connected to an actuator of, for example, the embodiment described in Swedish patent application 9001116-4. With the aid of the actuator, the movable contact can be displaced between the position shown on the left in the figure and the position shown on the right in the figure. The movable contact 3 carries a hollow cylinder 5 made of metal which encloses a pressure collecting space 6, the volume of which is constant, a compression chamber 7, and an electrically insulating blow nozzle 8 with an annular channel 9, which connects the pressure collecting space 6 to the area where the arc burns during a maneuver. The hollow cylinder 5 constitutes the movable operating current contact of the switch, which cooperates with a fixed operating current contact 10.
Tryckuppsamlingsrummet 6 och kompressionsrummet 7 är koaxiellt anordnade omkring den rörliga kontaktstången 4 och är åtskilda av en vägg 11 försedd med öppningar 12. I anslutning till dessa öppningar är en såsom backventil fungerande ringformig skiva 13 anordnad, vilken är axiellt förskjutbar mellan väggen 11 och ett på den rörliga kontaktstången fixerat begräns- ningsanslag 14. Denna backventil 13 tillåter strömning endast i riktning från kompressionsrummet 7 till tryckuppsamlingsrummet 6.The pressure collection space 6 and the compression space 7 are coaxially arranged around the movable contact rod 4 and are separated by a wall 11 provided with openings 12. In connection with these openings an annular disc 13 acting as a non-return valve is arranged, which is axially displaceable between the wall 11 and a the movable contact rod fixed limiting stop 14. This non-return valve 13 allows flow only in the direction from the compression chamber 7 to the pressure collection chamber 6.
Kompressionsrummet 7 avgränsas av en blåscylinder 15 och en blåskolv 16, där blåscylindern 15 i sin tur avgränsas av hålcylindern 5, den rörliga kontaktstången 4 och väggen 11, vilken utgör botten i blåscylindern.The compression chamber 7 is delimited by a blowing cylinder 15 and a blowing piston 16, where the blowing cylinder 15 is in turn delimited by the hollow cylinder 5, the movable contact rod 4 and the wall 11, which forms the bottom of the blowing cylinder.
Blåskolven 16 utgöres av en ringformig skiva som vilar på ett antal fjäd- rar 17, vilka stöder mot ett fast mothåll 18.The blow piston 16 consists of an annular disc resting on a number of springs 17, which support against a fixed abutment 18.
Vid en brytmanöver dras kontaktstången 4 nedåt med hjälp av manöverdonet. varvid först driftströmskontakterna 5 och 10 skiljs åt. Strömmen kommute- rar därvid över till ljusbâgskontakterna 2, 3 som skiljs åt, och en ljus- bâge bildas mellan dem. Ljusbågen upphettar gasen i ljusbågsområdet varvid gastrycket ökar och en gasströmning genom kanalen 9 in i tryckuppsamlings- rummet 6 sätts igång. Till följd av denna strömning ökar trycket i tryck- 1/ 466 979 uppsamlingsrummet 6. Ljusbágsströmmen följer den nätfrekventa sinuskurvan, och när strömvärdet närmar sig nollgenomgången börjar trycket i ljusbågs- området avta. Kontaktrörelsen har nu fortskridit så långt, att pluggkon- takten 2 har frigett dysutloppet, där trycket nu är lägre än i tryckupp- samlingsrummet 6. Detta ger upphov till en gasströmning från tryckuppsam- lingsrummet 6 genom kanalen 9 och dysan 8 till ett omgivande expansionsrum 19. Ljusbågen kyls genom denna strömning och släcks vid följande ström- nollgenomgång. trycket i kompressionsrummet nått en viss nivå rör sig blåskolven en förutbestämd sträcka, vilket innebär att kompressionsrummet temporärt ökar. Mot slutet av frånmanövern minskar trycket i tryckuppsamlingsrummet 6, så som ovan beskrivits, och backventilen 13 öppnar. Trycket i kompres- sionsrummet 7 minskar därvid, vilket medför att blåskolven 16 gör en åter- gående rörelse och en extra gaspuff trycks in i tryckuppsamlingsrummet 6 förbättras.During a switching operation, the contact rod 4 is pulled downwards by means of the actuator. first separating the operating current contacts 5 and 10. The current then commutates over to the arc contacts 2, 3 which are separated, and an arc is formed between them. The arc heats the gas in the arc region, increasing the gas pressure and starting a gas flow through the channel 9 into the pressure collection space 6. As a result of this flow, the pressure in the pressure collection space 6 increases. The arc current follows the mains frequency sine curve, and as the current value approaches zero crossing, the pressure in the arc region begins to decrease. The contact movement has now progressed so far that the plug contact 2 has released the nozzle outlet, where the pressure is now lower than in the pressure collection space 6. This gives rise to a gas flow from the pressure collection space 6 through the channel 9 and the nozzle 8 to a surrounding expansion chamber 19. The arc is cooled by this flow and extinguished at the next current zero crossing. the pressure in the compression chamber has reached a certain level, the blow piston moves a predetermined distance, which means that the compression chamber temporarily increases. Towards the end of the maneuver, the pressure in the pressure collection space 6 decreases, as described above, and the non-return valve 13 opens. The pressure in the compression chamber 7 is thereby reduced, which means that the blow piston 16 makes a reciprocating movement and an extra gas puff is pressed into the pressure collection chamber 6 is improved.
Vid brytning av relativt små strömmar år den av ljusbågen alstrade tryck- ökningen i tryckuppsamlingsrummet 6 otillräcklig för att åstadkomma en effektiv släckgasström. I sådana fall sker ljusbågssläckningen med hjälp av kompressionsrummet 7, i vilket en tryckuppbyggnad sker under frånslags- förloppet på grund av väggens 11 nedåtgående rörelse. Trycket i kompres- sionsrummet 7 blir därvid högre än i tryckuppsamlingsrummet 6, vilket med- för att backventilen 13 öppnar och kall släckgas strömmar från kompres- sionsrummet 7 via tryckuppsamlingsrummet 6 och kanalen 9 till blåsdysan 8, där ljusbågen avkyls och släcks.When breaking relatively small currents, the pressure increase generated by the arc in the pressure collection space 6 is insufficient to produce an efficient extinguishing gas flow. In such cases, the arc is extinguished by means of the compression chamber 7, in which a pressure build-up takes place during the shut-off process due to the downward movement of the wall 11. The pressure in the compression chamber 7 then becomes higher than in the pressure collection chamber 6, which means that the non-return valve 13 opens and cold extinguishing gas flows from the compression chamber 7 via the pressure collection chamber 6 and the channel 9 to the blow nozzle 8, where the arc is cooled and extinguished.
Uppfinningen är inte begränsad till det visade utföringsexemplet, utan flera varianter är möjliga inom ramen för patentkraven. Exempelvis kan blåskolven 16 vara försedd med en övertrycksventil för utsläpp av gas från kompressionsrummet 7 till expansionsrummet 19 om trycket i kompressions- rummet skulle överstiga en viss nivå. Dessutom kan blåskolven vara försedd med en backventil för att vid tillslagning av brytaren återfylla kompres- sionsrummet med gas från expansionsrummet.The invention is not limited to the exemplary embodiment shown, but several variants are possible within the scope of the claims. For example, the blow piston 16 may be provided with a pressure relief valve for discharging gas from the compression chamber 7 to the expansion chamber 19 if the pressure in the compression chamber should exceed a certain level. In addition, the blow piston can be equipped with a non-return valve to refill the compression chamber with gas from the expansion chamber when the switch is switched on.
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9002885A SE466979B (en) | 1990-09-11 | 1990-09-11 | SELF-Blow type high voltage switch |
DE1991606986 DE69106986T2 (en) | 1990-09-11 | 1991-09-05 | High voltage switch with self-blowing. |
EP19910114964 EP0475270B1 (en) | 1990-09-11 | 1991-09-05 | High-voltage circuit breaker of self-blasting type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9002885A SE466979B (en) | 1990-09-11 | 1990-09-11 | SELF-Blow type high voltage switch |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9002885D0 SE9002885D0 (en) | 1990-09-11 |
SE9002885L SE9002885L (en) | 1992-03-12 |
SE466979B true SE466979B (en) | 1992-05-04 |
Family
ID=20380323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9002885A SE466979B (en) | 1990-09-11 | 1990-09-11 | SELF-Blow type high voltage switch |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0475270B1 (en) |
DE (1) | DE69106986T2 (en) |
SE (1) | SE466979B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2696274B1 (en) * | 1992-09-29 | 1994-11-04 | Alsthom Gec | Self-blowing high voltage circuit breaker having a reduced gas compression interrupting chamber. |
JPH06310000A (en) * | 1993-04-20 | 1994-11-04 | Hitachi Ltd | Grounding switch |
FR2715499B1 (en) * | 1994-01-25 | 1996-03-15 | Gec Alsthom T & D Sa | Self-blowing circuit breaker with pneumatically locked piston. |
ATE160466T1 (en) * | 1994-06-20 | 1997-12-15 | Gec Alsthom T & D Ag | COMPRESSED GAS SWITCH |
DE29509015U1 (en) * | 1995-05-24 | 1995-08-03 | Siemens AG, 80333 München | High-voltage circuit breakers with a fixed heating volume |
FR2748598B1 (en) * | 1996-05-13 | 1998-06-05 | Gec Alsthom T & D Sa | HIGH-VOLTAGE SELF-BLOWING CIRCUIT BREAKER |
FR2751462B1 (en) * | 1996-07-22 | 1998-08-28 | Gec Alsthom T & D Sa | HIGH VOLTAGE CIRCUIT BREAKER WITH SELF-BLOWING ARC |
FR2751782B1 (en) * | 1996-07-23 | 1998-08-28 | Gec Alsthom T & D Sa | HIGH VOLTAGE CIRCUIT BREAKER WITH SELF-BLOWING ARC |
FR2799571B1 (en) * | 1999-10-07 | 2001-12-21 | Schneider Electric High Voltag | SELF-EXPANSION BREAKER WITH PRESSURE AND FILLING VALVE |
ES2179773B1 (en) * | 2001-03-30 | 2004-03-16 | Grupo Ormazabal Sa | BLOWING SYSTEM FOR LOAD CUTTING SWITCHES |
KR101309317B1 (en) * | 2009-09-10 | 2013-09-30 | 엘에스산전 주식회사 | Valve for gas circuit breaker and a gas circuit breaker with the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1765153A1 (en) * | 1967-04-13 | 1971-07-01 | Magrini Fab Riun Scarpa | Self-extinguishing electrical gas pressure switch with switching chamber with a mouth opening |
JPS4981874A (en) * | 1972-12-14 | 1974-08-07 | ||
FR2291601A1 (en) * | 1974-11-15 | 1976-06-11 | Alsthom Cgee | Arc extinction by aurocompression in circuit breakers - involves use of cylinder type unit which has piston in centre delayed by spring |
JPS5813565Y2 (en) * | 1977-10-31 | 1983-03-16 | 日新電機株式会社 | Suction puffer type switch |
DE3141324C2 (en) * | 1981-10-17 | 1986-02-06 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Circuit breaker |
-
1990
- 1990-09-11 SE SE9002885A patent/SE466979B/en unknown
-
1991
- 1991-09-05 EP EP19910114964 patent/EP0475270B1/en not_active Expired - Lifetime
- 1991-09-05 DE DE1991606986 patent/DE69106986T2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0475270A2 (en) | 1992-03-18 |
EP0475270A3 (en) | 1992-11-19 |
SE9002885L (en) | 1992-03-12 |
DE69106986D1 (en) | 1995-03-09 |
EP0475270B1 (en) | 1995-01-25 |
SE9002885D0 (en) | 1990-09-11 |
DE69106986T2 (en) | 1995-09-21 |
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