EP2256776A1 - Hochspannungsschutzschalter mit verbessertem Gasaustritt - Google Patents

Hochspannungsschutzschalter mit verbessertem Gasaustritt Download PDF

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Publication number
EP2256776A1
EP2256776A1 EP10163164A EP10163164A EP2256776A1 EP 2256776 A1 EP2256776 A1 EP 2256776A1 EP 10163164 A EP10163164 A EP 10163164A EP 10163164 A EP10163164 A EP 10163164A EP 2256776 A1 EP2256776 A1 EP 2256776A1
Authority
EP
European Patent Office
Prior art keywords
baffles
baffle
hot gases
exhaust
envelope
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
EP10163164A
Other languages
English (en)
French (fr)
Other versions
EP2256776B1 (de
Inventor
Lionel Jourdan
Cyrille Reyx
Chakib Fnineche
Jean-Baptiste Jourjon
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.)
General Electric Technology GmbH
Original Assignee
Areva T&D SAS
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 Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP2256776A1 publication Critical patent/EP2256776A1/de
Application granted granted Critical
Publication of EP2256776B1 publication Critical patent/EP2256776B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/88—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
    • 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
    • H01H2033/888—Deflection of hot gasses and arcing products
    • 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
    • H01H33/91—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 arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to the field of high voltage circuit breakers under tank or metal shell, type GIS (Gas Insulated Switchgear) or Dead tank type. These circuit breakers can be part of a metal enclosure.
  • GIS Gas Insulated Switchgear
  • Dead tank type can be part of a metal enclosure.
  • the invention relates more particularly to a method for evacuating the hot gases generated by a break in such a circuit breaker and the associated circuit breaker structure.
  • the hot gases i.e., plasma and exhaust gases
  • the hot gases can promote reboots between the various live cut-off parts and the parts connected to the earth such as the metal tank.
  • a first type of arrangement for example provided on Japanese type circuit breakers, such as that disclosed in the patent application JP2003217411 , comprises a short tube implanted at the outlet of the nozzle blowing hot gases and which also makes it possible to blow these directly inside the tank metallic.
  • the dielectric insulation is obtained by maintaining great distances between the discharge ring formed with the tube and the metal tank.
  • a second type of arrangement for example provided on the "Dead tank” as published in the patent application EP1806760 , allows to have a volume of dielectric gas present in the metal part of the exhaust sufficiently large to absorb all the hot gases generated during the longest arc period of the maximum short-circuit current.
  • This exhaust arrangement includes lateral openings on the side through which the hot gases escape into the interior of the metal vessel.
  • the first type referred to above encloses volumes of insulating gas which are by construction less than the amount of hot gases blown during a break. Therefore, larger overall dimensions of the metal tank than the second type are provided because these hot gases are discharged in an uncontrolled manner, and therefore dimensional safety margins must be taken to ensure dielectric strength to the tank.
  • the closure provided in the arrangement of the second type involves a sufficient volume to keep the hot gases inside the metal part of the exhaust. Also, the dimensional safety margin between the outside of the exhaust and the metal tank can be reduced.
  • the patent EP 1930929 discloses a so-called separation edge solution 21 at the exit of the exhaust gas 9 produced in the form of a narrow channel 22 between a portion of the fixed contact support 5 prolonged and an envelope 18 fixed to the bar conductor 13 for supplying current.
  • the realization of the edge 21 in the form of a groove transverse to the channel 22 avoids the Coanda effect, that is to say, to take off the flow of exhaust gases 9 and thus to avoid that these they adhere to the convex surface 20 of the exhaust outlet and thus are guided to dielectrically charged areas.
  • the patent EP 1835520 discloses a particular construction of an annular exhaust channel 20 by a kind of cap 16 around the support casing 8 of the fixed contact A.
  • the construction according to this patent is intended to avoid priming at the tank trying to orient the gas horizontally, that is to say substantially parallel to the walls of the tank, and to promote their cooling.
  • a problem that has so far not been highlighted is that of the risk of re-priming by direct projection of the metal particles or by displacement of metal particles resulting from opening maneuver (s) of the previous circuit breaker to sensitive areas, the displacement of said metal particles already present being caused by the discharge of the hot gases itself during a subsequent maneuver. Indeed, whatever the envisaged exhaust, during each opening maneuver there is friction between different parts that generate chips or metal particles. These metal particles created are projected by the exhaust gases and settle down the metal tank.
  • This problem can be all the more important as the space between the outside of the exhaust and the metal tank is reduced: in this case, the metal particles accumulated in the bottom of the tank are even closer to the exhaust and therefore likely to be displaced by the discharge of hot gases at the outlet of the exhaust to areas sensitive to reinforcement such as insulating cones.
  • insulating cones the elements shaped cones, made of electrically insulating material and whose function is to fix the exhaust casing to the metal tank .
  • the object of the invention is therefore to provide a solution for evacuation (exhaust) of the hot gases in baffles in a high-voltage circuit breaker which makes it possible to avoid, on the one hand, the risks of electrical rebooting by direct projection towards sensitive areas or by moving the metal particles already accumulated at the bottom of the metal tank towards said zones sensitive to reinforcement, such as insulating cones, and secondly, the risks of rebooting between arc contacts and between main (permanent) contacts.
  • one of the baffles downstream of the inlet baffle, comprises an inclined wall to deflect the hot exhaust gases radially outwardly of the envelope, the inclination of the wall being included in an angle between ° and 80 ° with respect to the longitudinal axis. This avoids the risk of a turbulent flow as soon as the baffles enter, since the hot gases are accelerated by said inclined wall.
  • the envelope comprises, at the output of the exit baffle, a surplus of material in the form of a rounded. Due to the presence of this rounding, the characteristics of the envelope according to the invention are improved: in other words, the risk of dielectric breakdown is limited to the metal tank.
  • An application particularly targeted by the invention is that according to which the high-voltage circuit breaker is a "GIS” or "Dead tank".
  • downstream and upstream are to be understood in relation to the direction of escape of hot gases GC evacuated during an arc failure by a high-voltage circuit breaker according to the invention.
  • the baffle 74 furthest downstream is the exhaust baffle inside the casing 3 which is the last crossing by the hot gases G.C.
  • FIG. 1 there is shown in longitudinal sectional view a circuit breaker 1 in metal casing (GIS) according to the state of the art arranged substantially horizontally and which extends along a longitudinal axis XX '.
  • This high-voltage circuit breaker 1 comprises a metal tank 2 filled with an insulating gas GI electrically connected to the ground.
  • An envelope 3 is arranged inside the metal tank 2 and is fixed to it by means of an insulating cone 4.
  • This envelope 3 consists of two parts, one of which is essentially in the form of a closed cylindrical drum by a hemispherical bottom 300 and the other 31 which constitutes a mouthpiece.
  • the barrel 30 closed at one of its ends by the hemispherical bottom 300 is cylindrical over a large part of its length and comprises a narrowing 301 at the other of its ends.
  • a tube 6 is fixed to the end piece 31 so as to extend inside the barrel 30 and the narrowing 301 of the casing 3.
  • the attachment between the barrel 30 and the end piece 31 is made by means of tabs 60.
  • the circuit breaker 1 also comprises a pair of arcing contacts of which only the fixed contact 50 is represented and is fixed to the casing 3.
  • the other movable contact in translation along the axis XX ' is integral with an insulating nozzle 51 intended to blow hot gases generated during the separation of the contacts.
  • the hot gases resulting from an arc cutting during which an opening operation of the arcing contacts is performed follow the path shown schematically in solid lines (GC) in Figure 1: these gases pass through the tube 6 (from the left to the right in Figure 1) and then change direction in contact with the hemispherical bottom 300 by passing through the volume of the cylindrical shaft 30 and then reach the inlet baffle 70 or in other words the annular volume between tube 6 and cylindrical drum 30 and closed 300.
  • the hot gases GC then follow the path delimited by the baffles 7 downstream of the entry baffle 7.
  • the hot gases GC which exit at the outlet 71 of the exhaust baffles 7 necessarily contain metal particles which are therefore deposited on the bottom of the tank 2.
  • the zones most sensitive to electrical reinforcement are those located Z between the insulating cone 4, which allows the fixing between the envelope 3 and the metal vessel 2, and the bottom 20 of the metal vessel 2.
  • the hot gases (GC) by the profile of the baffles 7 according to the state of the art are discharged in a direction directed towards the insulating cone 4, that is to say potentially towards the area sensitive to Z.
  • the envelope (3) consists of two parts 30, 31.
  • One of these parts consists of a cylindrical barrel 30 closed, at one of its ends 30a, by a hemispherical bottom 300 adapted to return the hot gases discharged from the blast nozzle 51 and between the fixed tube 6 and the contact fixed 50, towards the annular volume of the inlet baffles 70, 71. More exactly, the annular volume delimited between the fixed tube 6 and the cylindrical drum 30 defines a first inlet baffle 70 of the hot gases brought back from the Hemispherical bottom 300. The annular volume delimited between the fixed tube 6 and a constriction 301 provided at the end 30b of the opposite end of the shaft 300 defines a second inlet baffle 71.
  • the other of the parts of the envelope 30 is constituted by a tip 31.
  • This tip 31 comprises, at one of its ends, a cylindrical wall 310 of diameters and thickness between the outer diameter of the necking 301 and the inner diameter of the cylindrical end 30b of the barrel 30 of the casing 3, and a truncated cone-shaped wall 311 connected to the cylindrical wall 310 and to which the tube 6 is internally fixed.
  • the exhaust baffles 72, 73, 74 in the continuity of the second inlet baffle 71 are thus formed by interlocking the end piece 31 in the cylindrical drum 30.
  • the interlocking is such that the cylindrical wall 310 of the tip 31 is housed in the volume between the cylindrical end wall 30b and the shrinkage 301 of the barrel delimiting the two baffles 73, 74 further downstream.
  • An intermediate baffle 72 between the second input baffle 71 is delimited between the truncated cone-shaped wall 311 of the nozzle 31 and the narrowing 301 of the barrel 30.
  • the two changes in the velocity vector of the hot gases GC are accordingly made by said intermediate baffle 72 and the two most downstream baffles 73, 74.
  • the walls 3010 and 3110 respectively of the shaft 30 and the tip 31 at the junction of the baffles 7 have a curved profile with a radius of curvature adapted to limit the pressure losses and thus promote the flow of gases.
  • the inclined wall in the form of a truncated cone 311 delimiting a portion of the intermediate baffle is inclined at an angle ⁇ of between 5 and 80 ° with respect to the longitudinal axis XX '.
  • an effective escape of the hot gases in a high-voltage circuit breaker is obtained by avoiding the risk of rebooting at the sensitive areas, such as the insulating cones 4 at the arcing contacts or at the contacts permanent.
  • the metal particles produced during an exhaust arc cut-off according to the invention are accumulated in an area remote from the cone 4.

Landscapes

  • Circuit Breakers (AREA)
EP20100163164 2009-05-26 2010-05-18 Hochspannungsschutzschalter mit verbessertem Gasaustritt Active EP2256776B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0953457A FR2946181B1 (fr) 2009-05-26 2009-05-26 Disjoncteur haute tension a echappement de gaz ameliore.

Publications (2)

Publication Number Publication Date
EP2256776A1 true EP2256776A1 (de) 2010-12-01
EP2256776B1 EP2256776B1 (de) 2012-07-25

Family

ID=41600716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100163164 Active EP2256776B1 (de) 2009-05-26 2010-05-18 Hochspannungsschutzschalter mit verbessertem Gasaustritt

Country Status (3)

Country Link
EP (1) EP2256776B1 (de)
CN (1) CN101901720B (de)
FR (1) FR2946181B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104362031B (zh) * 2014-10-31 2017-09-29 平高集团有限公司 罐体及使用该罐体的灭弧室、高压开关装置
CN104362034B (zh) * 2014-10-31 2017-12-08 平高集团有限公司 一种开关罐体及使用该开关罐体的灭弧室、高压开关装置
CN104362035B (zh) * 2014-10-31 2017-10-10 平高集团有限公司 一种高压开关装置及其灭弧室、罐体
CN104362536B (zh) * 2014-10-31 2017-01-11 平高集团有限公司 一种封闭式开关装置及其灭弧室、罐体
CN104362032B (zh) * 2014-10-31 2017-12-05 平高集团有限公司 一种开关装置及其灭弧室、罐体

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984651A (en) * 1975-05-01 1976-10-05 Mcgraw-Edison Company Electrical loadbreak arc quenching and containing assembly
WO2001033594A1 (de) * 1999-11-03 2001-05-10 Siemens Aktiengesellschaft Druckgas-leistungsschalter
JP2003217411A (ja) 2002-01-18 2003-07-31 Toshiba Corp ガス遮断器
EP1768150A1 (de) 2005-09-26 2007-03-28 ABB Technology AG Hochspannungsschalter mit verbesserter Schaltleistung
EP1806760A1 (de) 2006-01-06 2007-07-11 Areva T&D Sa Gasaustritt für Schalter
EP1835520A1 (de) 2006-03-14 2007-09-19 ABB Technology AG Schaltkammer für einen gasisolierten Hochspannungsschalter
EP1930929A1 (de) 2006-12-06 2008-06-11 Abb Research Ltd. Hochspannungsschalter mit einem isoliergasgefüllten Metallbehälter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984651A (en) * 1975-05-01 1976-10-05 Mcgraw-Edison Company Electrical loadbreak arc quenching and containing assembly
WO2001033594A1 (de) * 1999-11-03 2001-05-10 Siemens Aktiengesellschaft Druckgas-leistungsschalter
JP2003217411A (ja) 2002-01-18 2003-07-31 Toshiba Corp ガス遮断器
EP1768150A1 (de) 2005-09-26 2007-03-28 ABB Technology AG Hochspannungsschalter mit verbesserter Schaltleistung
EP1806760A1 (de) 2006-01-06 2007-07-11 Areva T&D Sa Gasaustritt für Schalter
EP1835520A1 (de) 2006-03-14 2007-09-19 ABB Technology AG Schaltkammer für einen gasisolierten Hochspannungsschalter
EP1930929A1 (de) 2006-12-06 2008-06-11 Abb Research Ltd. Hochspannungsschalter mit einem isoliergasgefüllten Metallbehälter

Also Published As

Publication number Publication date
CN101901720B (zh) 2014-08-20
CN101901720A (zh) 2010-12-01
EP2256776B1 (de) 2012-07-25
FR2946181A1 (fr) 2010-12-03
FR2946181B1 (fr) 2011-07-01

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