EP0895262A1 - Gasschalter mit komprimierbaren Volum und Wärmeausdehnung - Google Patents

Gasschalter mit komprimierbaren Volum und Wärmeausdehnung Download PDF

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Publication number
EP0895262A1
EP0895262A1 EP98401796A EP98401796A EP0895262A1 EP 0895262 A1 EP0895262 A1 EP 0895262A1 EP 98401796 A EP98401796 A EP 98401796A EP 98401796 A EP98401796 A EP 98401796A EP 0895262 A1 EP0895262 A1 EP 0895262A1
Authority
EP
European Patent Office
Prior art keywords
contact
wear contact
hollow
axis
rod
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.)
Withdrawn
Application number
EP98401796A
Other languages
English (en)
French (fr)
Inventor
Michel Perret
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D 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
Application filed by GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0895262A1 publication Critical patent/EP0895262A1/de
Withdrawn legal-status Critical Current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
    • H01H33/88—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

Definitions

  • the invention relates to a compressed gas switch comprising two contact sets each having at least one wear contact, one of which is movable along an axis with respect to the other which is fixed and where the contact wear provided to the fixed contact crew in the form of a rod and is introduced, in the closed position, in the hollow wear contact of the contact assembly mobile which is moved along the axis by an insulating operating rod, with in addition a gas compression chamber which communicates, in position opening, through an insulating nozzle with an expansion chamber, this nozzle being coaxial with the two contact crews and fixed on the crew of movable contacts to be crossed by the wear contact of the crew fixed contacts in closed position.
  • Such a switch which can be used in high or medium voltage for circuit breaker, disconnector, in a shielded or open position, is already known from the patent application FR-9211588.
  • the compression which communicates through the nozzle neck, in the open position of the switch, with the expansion chamber is a compression chamber constant volume thermal.
  • the gas used to blow the arc is compressed by a piston placed in another volume compression chamber variable provided behind the thermal compression chamber with respect to to the nozzle.
  • the piston compression chamber and the compression chamber communicate with each other by one-way valves provided in a wall separating these two chambers. In this known construction, it it is therefore necessary to delimit two compression volumes of the gas and provide communication valves between these two volumes.
  • the object of the invention is to propose a solution to simplify the construction of such a switch so as to reduce in particular the number of constituent parts.
  • the gas switch according to the invention is characterized in that a piston, which is integral with the hollow wear contact, is mounted sliding in a cylinder integral with the operating rod, this cylinder delimiting the compression chamber with the piston and the nozzle, in that the hollow wear contact is movable relative to the operating rod along the axis, and in that a locking means is provided for immobilizing along the axis the hollow wear contact during the start of the stroke of the rod operation between the closed position and the open position and for fastening said hollow wear contact in motion to the operating rod in end of the race.
  • the operating rod moves the cylinder with the nozzle along the axis, while the piston remains fixed the along this axis.
  • the wear contact of the fixed contact crew is released from the wear contact of the crew movable contacts, also disengages from the nozzle, which allows setting communication of the compression chamber with the expansion chamber by the nozzle neck.
  • Such an arrangement also avoids the pressure drops usually due the transfer of gas from the compression volume by piston to the volume of thermal compression.
  • the layout according to the invention provides better control of thermal compression.
  • Figure 1 schematically illustrates a compressed gas switch according to the invention in the closed position.
  • Figure 2 schematically illustrates the switch of Figure 1 in a first intermediate position between its closed position and its position opening hours.
  • Figure 3 schematically illustrates the switch of Figure 1 in a second intermediate position between its closed position and its position opening hours.
  • Figure 4 schematically illustrates the switch of Figure 1 in a third intermediate position between its closed position and its position opening hours.
  • FIG. 5 schematically illustrates the switch of Figure 1 in its fully open position.
  • the contact crews 1 and 2 respectively each have a permanent current contact 4 respectively 5 and a wear or arcing contact 6 respectively 7 which are electrically connected to an electrical connection not shown. These different contacts are essentially symmetrical of rotation and are essentially tubular which ensures a great compactness of the whole.
  • the contact assembly 2 is mobile and can slide in the envelope on along the axis 3 under the action of an insulating operating rod 8 which is operated from outside the housing and which extends along this axis 3. It has an insulating nozzle 9 with a neck 10 which is used for blowing the arc electric as is well known. In the closed position, this nozzle 9 is arranged coaxially between contact 4 and contact 6. It is fixed to the cylinder forming the contact 5 and has its neck 10 which is crossed by the wear contact 6 in rod form which is itself inserted into the hollow wear contact 7.
  • the contact equipment 2 also includes a compression chamber thermal 11 defined by the cylinder forming the contact 5.
  • This compression 11, is intended to accumulate compressed gas, and to be put in communication with an expansion volume V of an expansion chamber 12 through the nozzle 9 when the wear contact 6 is released from the nozzle 9 during the break.
  • the cylinder constituting the contact 5 is slidably mounted in a tube cylindrical metal guide 13 which is fixedly mounted in the housing along the axis 3. It is surrounded by a sliding contact 14 mounted inside the tube 13 which is used for the passage of current between the tube 13 and the contact 5.
  • a metal crown 15 which extends radially in the cylinder forming the permanent current contact 5, this crown constituting a gas compression piston in the compression 11.
  • the crown 15 or compression piston comprises one or several unidirectional valves allowing a gas inlet, at the engagement, in chamber 11 from the volume located at the rear of the crown 15 (on the right in the figures). It will therefore be understood that the volume of the compression chamber 11 is compressible and is delimited by the cylinder 5, the nozzle 9 and the piston.
  • the crown 15 is further surrounded by a sliding contact 17 which is mounted in cylinder 5 to ensure a flow of current from this cylinder to the wear contact 7.
  • This rod 18 also crosses radially a tubular extension of the wear contact 7 by a longitudinal slot 19, the operating rod 8 sliding along axis 3 inside the tubular extension of the wear contact 7.
  • the connecting rod 18 can slide on a certain distance along the axis 3 in the slot 19 by driving the cylinder 5 while the tubular extension of the wear contact 7 remains fixed along this axis 3.
  • the tubular extension of the wear contact 7 also slides the along axis 3 in another fixed tube 20 along axis 3 serving as support guide.
  • the tubular extension of the wear contact 7 comprises one or more side holes 21 in which are housed locking balls 22 which come to engage in recesses 23 and 24 provided respectively in the tube 20 and in the operating rod 8.
  • the recesses 23 and 24 are spaced apart from each other along axis 3 a distance substantially less than the length of the slot 19 in the tubular extension of the wear contact 7.
  • the tubular extension of the wear contact 7 also has one or more several gas exhaust openings 25 arranged substantially in rear of the piston (on the right in the figure) and a warhead 26 serving as deflector for these gases.
  • the operating rod 8 continues its course to the right on the figure and now trains the whole crew of movable contacts 2, namely the cylinder 5 with the nozzle 9 and the wear contact 7 with the piston.
  • the wear contacts 7 and 6 separate first and a electric arc between these two contacts.
  • the wear contact 6 still crosses the nozzle 9 which isolates the expansion chamber 12 from the compression chamber 11.
  • the gas under pressure in the compression chamber 11 still rises in pressure under the effect of the electric arc and comes to escape towards the interior of the hollow wear contact 7 which is used for blowing the electric arc. It emerges from hollow wear contact 7 through the lateral openings 25 being guided by the warhead 26, then escapes through the open end of the cylinder 5 behind the piston, and finally by lateral openings 27 provided in the tube 13.
  • the circulation of gas participating in this first blowing of the arc is symbolized by arrows.
  • the separation distance of the recesses 23 and 24 along of axis 3 allows to set the desired piston compression value in the compression chamber 11.
  • the thermal compression of the gas in the chamber 11 is done at constant volume without pressure loss. Such an arrangement allows double blowing of the electric arc to cut large currents such as capacitive currents with low operating energy.

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  • Circuit Breakers (AREA)
EP98401796A 1997-07-24 1998-07-16 Gasschalter mit komprimierbaren Volum und Wärmeausdehnung Withdrawn EP0895262A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709419 1997-07-24
FR9709419A FR2766609B1 (fr) 1997-07-24 1997-07-24 Interrupteur a gaz a volume d'expansion thermique compressible

Publications (1)

Publication Number Publication Date
EP0895262A1 true EP0895262A1 (de) 1999-02-03

Family

ID=9509578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401796A Withdrawn EP0895262A1 (de) 1997-07-24 1998-07-16 Gasschalter mit komprimierbaren Volum und Wärmeausdehnung

Country Status (3)

Country Link
US (1) US5939692A (de)
EP (1) EP0895262A1 (de)
FR (1) FR2766609B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807870A1 (fr) * 2000-04-18 2001-10-19 Alstom Interrupteur a soufflage d'arc, possedant une chambre de coupure a compression de gaz reduite et un mouvement alternatif du piston
FR2892851A1 (fr) * 2005-11-03 2007-05-04 Areva T & D Sa Chambre de coupure de courant a double chambre de compression

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE518289T1 (de) * 2001-10-29 2011-08-15 Abb Research Ltd Gis-stützisolator mit integrierter barriere
ATE388478T1 (de) † 2002-09-24 2008-03-15 Abb Schweiz Ag Leistungsschalter
DE60311485T2 (de) * 2003-12-19 2007-11-15 Abb Technology Ag Gasisolierte Schaltvorrichtung mit einer Düse
DE102011083594A1 (de) * 2011-09-28 2013-03-28 Siemens Aktiengesellschaft Leistungsschalterunterbrechereinheit
JP2017050048A (ja) * 2015-08-31 2017-03-09 株式会社日立製作所 ガス遮断器
CN114141574B (zh) * 2021-10-20 2024-03-26 平高集团有限公司 一种断路器及其主拉杆

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491675A1 (fr) * 1980-10-07 1982-04-09 Alsthom Atlantique Dispositif de coupure a double mouvement des contacts
DE3930548A1 (de) * 1989-09-13 1991-03-21 Licentia Gmbh Schalter mit selbsterzeugter lichtbogenbeblasung
EP0508160A2 (de) * 1991-04-12 1992-10-14 GEC Alsthom T&D AG Druckgasschalter
EP0591039A1 (de) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression
EP0641002A1 (de) * 1993-08-30 1995-03-01 Gec Alsthom T Et D Sa Hoch- oder Mittelspannungsschalter mit Druckkontakten
EP0664552A1 (de) * 1994-01-25 1995-07-26 Gec Alsthom T & D Sa Autopneumatischer Druckgasschalter mit Doppelbewegung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596574B1 (fr) * 1986-04-01 1988-05-20 Alsthom Disjoncteur a haute tension a gaz dielectrique sous pression

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491675A1 (fr) * 1980-10-07 1982-04-09 Alsthom Atlantique Dispositif de coupure a double mouvement des contacts
DE3930548A1 (de) * 1989-09-13 1991-03-21 Licentia Gmbh Schalter mit selbsterzeugter lichtbogenbeblasung
EP0508160A2 (de) * 1991-04-12 1992-10-14 GEC Alsthom T&D AG Druckgasschalter
EP0591039A1 (de) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression
EP0641002A1 (de) * 1993-08-30 1995-03-01 Gec Alsthom T Et D Sa Hoch- oder Mittelspannungsschalter mit Druckkontakten
EP0664552A1 (de) * 1994-01-25 1995-07-26 Gec Alsthom T & D Sa Autopneumatischer Druckgasschalter mit Doppelbewegung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807870A1 (fr) * 2000-04-18 2001-10-19 Alstom Interrupteur a soufflage d'arc, possedant une chambre de coupure a compression de gaz reduite et un mouvement alternatif du piston
EP1148527A1 (de) * 2000-04-18 2001-10-24 Alstom Schalter mit Lichtbogenbeblasung, versehen mit einer Lichtbogenkammer mit reduzierter Gaskompression und hin- und hergehendem Kolben
US6489581B2 (en) 2000-04-18 2002-12-03 Alstom Arc-blasting switch possessing a break chamber with low gas compression and reciprocating piston movement
FR2892851A1 (fr) * 2005-11-03 2007-05-04 Areva T & D Sa Chambre de coupure de courant a double chambre de compression
WO2007051778A1 (fr) * 2005-11-03 2007-05-10 Areva T & D Sa Chambre de coupure de courant a double chambre de compression
US7964816B2 (en) 2005-11-03 2011-06-21 Areva T&T SA Interrupting chamber having two compression chambers
KR101332724B1 (ko) * 2005-11-03 2013-11-25 알스톰 그리드 에스아에스 이중의 압축 챔버를 구비한 전류 차단기 장치

Also Published As

Publication number Publication date
US5939692A (en) 1999-08-17
FR2766609B1 (fr) 1999-09-24
FR2766609A1 (fr) 1999-01-29

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