EP0986081A1 - Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit - Google Patents

Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit Download PDF

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Publication number
EP0986081A1
EP0986081A1 EP99402150A EP99402150A EP0986081A1 EP 0986081 A1 EP0986081 A1 EP 0986081A1 EP 99402150 A EP99402150 A EP 99402150A EP 99402150 A EP99402150 A EP 99402150A EP 0986081 A1 EP0986081 A1 EP 0986081A1
Authority
EP
European Patent Office
Prior art keywords
contact
switch
block
longitudinal direction
contacts
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
EP99402150A
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English (en)
French (fr)
Other versions
EP0986081B1 (de
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
Alstom France 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 Alstom France SA filed Critical Alstom France SA
Publication of EP0986081A1 publication Critical patent/EP0986081A1/de
Application granted granted Critical
Publication of EP0986081B1 publication Critical patent/EP0986081B1/de
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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch

Definitions

  • the invention relates to a compressed gas switch, in particular a high voltage circuit breaker, comprising in an envelope which extends in a direction longitudinal, a first set of contacts including a first permanent current contact and first contact arcing, a second movable contact assembly according to the longitudinal direction with respect to the first crew of contacts and including a second permanent contact and a second arcing contact intended to connect respectively at the first permanent contact and at the first arcing contact, and a resistance insertion system during closing of the switch, this resistor being connected electrically in series between the first arcing contact and the first permanent current contact.
  • Such resistance serves to limit the effects of transient currents on the network when closing the switch.
  • this resistance is inserted when is established, when the switch closes, an electrical connection between the arcing contacts and is short-circuited before the connection between the permanent current contacts.
  • the resistor When opening the switch, the resistor must not be inserted.
  • the duration of insertion of this resistance may vary from one installation to another. This duration is generally dependent on the speed at which the crew is moved of mobile contacts. Some switches allow to obtain an insertion time of the order of 6 ms for a moving speed of the moving contact assembly of around 4 m / s. Some installations require the use of switches to reach a much longer resistance insertion time, of the order of 14 ms.
  • An object of the invention is to propose a system insertion of a resistance to obtain a duration insertion of significant resistance.
  • Another object of the invention is to propose a system insertion of a closing resistor which is compact and which requires few parts.
  • the invention relates to a switch compressed gas comprising, in an envelope which extends in a longitudinal direction, a first crew of contacts including a first permanent current contact and a first arcing contact, a second set of contacts movable in the longitudinal direction relative to the first contact crew and including a second contact permanent and a second arcing contact intended to connect respectively at the first permanent contact and at the first arcing contact, and a resistor insertion system when the switch closes, this resistance being electrically connected in series between the first arcing contact and the first permanent current contact, characterized in that the insertion system of the resistance includes two auxiliary contacts, the first is electrically connected to the first contact of permanent current and the second is connected to the first contact arcing, in that these two auxiliary contacts are mounted moving relative to each other in the direction longitudinal so as to be able to approach one of the other, when the switch closes, to establish a connection that bypasses the resistor and so as to be united in displacement following the longitudinal direction, when closing the switch, before establishing said connection which
  • the first arcing contact has the shape of a rod on which a metal block slides carrying the second auxiliary contact and this block is pushed in the longitudinal direction, when closing the switch, by a nozzle secured to the second contact arc.
  • the duration of insertion of the resistance can be set to the speed of movement of the crew of mobile contacts.
  • the block has a substantially conical end which fits into the nozzle. In this way, we remove the shock effect on the block when the switch closes, which contributes to put the block in motion at the same speed as the contact mobile.
  • the block includes a tubular extension which extends in the direction longitudinal and on which an insulating piece slides integral with the first auxiliary contact, the extension tubular having an end forming a piston which cooperates with a recess in the insulating part of such so that the piston is made integral with the part insulating, when the switch closes, through play a depression created in the recess of the insulating part between the piston and the insulating part.
  • the block includes an internal chamber which is divided by a radial shoulder of the stem of the first arcing contact, and in which a spring is placed in the chamber against the radial shoulder of the rod in such a way that moving the block along the stem of the first arcing contact, when the switch closes, causes the spring to compress as the chamber fills with gas and that when opening the switch, the spring when relaxing exerts a force recall which tends to automatically move the block in opposite direction at the same time as the gases are evacuated from the chamber through an orifice thereof, the orifice being further calibrated for resistance against the force of spring reminder.
  • Such an arrangement makes it possible to obtain simple way with few parts and by pneumatic means, when the switch is opened, a disconnection of the auxiliary contacts effective only after disconnection of arcing contacts and current contacts permanent. Resistance cannot be inserted during opening the switch.
  • the first contact auxiliary and the first permanent current contact are mounted integral on a tube movable in the direction longitudinal, and in which a spring is arranged against the movable tube to oppose the movement of this tube in the longitudinal direction, when closing the switch, this spring exerting a restoring force during of the switch opening which tends to move automatically the tube in said longitudinal direction and in a contrary direction.
  • Figure 1 shows very schematically a switch according to the invention in open position complete.
  • Figure 2 shows very schematically the switch of Figure 1 in a first position intermediate closure.
  • Figure 3 shows very schematically the switch of figure 1 in a second position intermediate closure.
  • Figure 4 shows very schematically the switch of Figure 1 in a third position intermediate closure.
  • Figure 5 shows very schematically the switch of Figure 1 in a fourth position intermediate closure.
  • Figure 6 shows very schematically the switch of Figure 1 in a closed position complete.
  • the switch shown is a switch used for very high voltage. It includes in an envelope insulating or metallic 1 of substantially cylindrical shape, for example in porcelain, which extends in a direction longitudinal D, a first movable contact assembly 2 in direction D and a second set of contacts 3.
  • the envelope is normally filled with a dielectric gas like SF6 under a pressure of a few bars to form a switching chamber.
  • the switch shown in the figures presents a symmetry of revolution in direction D.
  • the switch includes at the end of the break on the side of contact 3, resistance R which is conventionally inserted into the electrical circuit of the switch when closing it.
  • the moving contact assembly 2 includes a contact permanent current 2A in the form of a crown of metal fingers and a hollow arc contact 2B also in the form of a crown of metallic fingers, the hollow arc contact 2B being arranged coaxially in contact 2A according to the direction D.
  • These movable contacts 2A and 2B are carried by a 2C tube fitted with a piston (not shown) of gas compression to extinguish the arc upon opening of the switch as is well known.
  • 2C tube also carries a 2D gas pipeline nozzle, the diverging, which is coaxial with contacts 2A and 2B following the direction D, opens with a diverging tulip on the side of the contact crew 3.
  • the contact crew 2A, 2B with the 2D nozzle is moved in translation in the direction D by an operating member of the switch not shown.
  • the contact arrangement 3 includes a current contact permanent 3A which is in the form of a crown of metal fingers arranged coaxially along the direction D at the crown of fingers of contact 2A and a arcing contact in the form of a rod 3B (possibly hollow) which extends in the direction D coaxially to the contact finger ring 2B.
  • a current contact permanent 3A which is in the form of a crown of metal fingers arranged coaxially along the direction D at the crown of fingers of contact 2A
  • a arcing contact in the form of a rod 3B possibly hollow
  • the arcing contact in the form of a rod 3B fits into the movable hollow arc contact 2B through the 2D nozzle and the 3A contact engages the contact 2A.
  • Resistor R is maintained in an insulating support 4 which is integral with the rod of the arcing contact 3B and extends in the direction D. This resistor R is connected electrically in series between the arcing contact 3B and the permanent current contact 3A although this does not appear not in the figures.
  • a metal block 5 is slidably mounted on the rod 3B in electrical contact with it via of accordion contacts 6.
  • Block 5 has one end of substantially conical shape adapted to fit into diverging from the nozzle neck and present on the surface outside of this conical end a bead peripheral 5A on which the edge of the the opening of the diverging portion of the 2D nozzle.
  • This block 6 carries a first auxiliary arcing contact 7A which is in the form of a crown of fingers and which cooperates with a second auxiliary arcing contact 7B in the form of a tube, these two arcing contacts auxiliaries 7A and 7B used to short-circuit the resistance R when the switch closes.
  • the fingers of contact 7A extend in direction D towards resistance R and the contact tube 7B extends in opposite direction, that is to say to the moving contact assembly 2.
  • the auxiliary contact 7B is electrically connected to the 3A permanent current contact via a metal tube 8 which is mounted movable in the direction D in the envelope 1, on another fixed metal tube 9 in the envelope and which surrounds the resistance R.
  • the tube metallic 8 is in electrical contact with the tube metallic 9 by means of sliding contacts 8A.
  • Block 5 which carries the auxiliary contact 7A comprises an internal chamber 10 which is sealed through by rod 3B of the fixed arcing contact of crew 3, on which it slides.
  • This room 10 is divided by a radial shoulder 11 of rod 3B (forming a sort of piston) on which a spring 12 is supported.
  • Chamber 10 has 5B calibrated orifices allowing exhaust gases from inside the chamber 10. The spring 12 is compressed when block 5 is moved in direction D from top to bottom in Figure 1.
  • Block 5 is extended by a tubular portion 5C which extends in the direction D by surrounding the rod 3B.
  • An insulating part 13 is slidably mounted on this tubular portion 5C.
  • the tubular portion 5C has a enlargement of the perimeter which forms a 5D piston suitable for come and break into an obviously 13A complementary to part 13.
  • the piston 5D has valves 5E oriented in such a way that the gases in the recess 13A can be freed from this obviously when the 5D piston inserts in this obviously.
  • the part 13 is integral with the tube 8 by through an insulating support cone 14 so that the tube 8 and therefore the contacts 3A and 7B are integral in movement in direction D with the insulating part 14.
  • a spring 15 is disposed between the tube 8 and a shoulder of the tube 9. This spring 15 is compressed when the tube 8 is moved in direction D from top to bottom on Figure 1. In addition, the stroke of the tube 8 from top to bottom in Figure 1 is stopped by a stop formed by the end of the tube 9 and the insulating cone 14.
  • arcing contacts auxiliaries 7A and 7B are separated by a certain distance dAX which can be used to adjust the insertion time of the resistance when closing the switch.
  • this resistance insertion time can be adjusted by the distance dAX 'which corresponds to the stroke of the tube 8 until the insulating cone abuts against the edge of tube 9.
  • the switch is in the fully positioned opened.
  • Contacts 2A, 2B and 7A are separate contacts 3A, 3B and 7B respectively.
  • the 5D piston is fully inserted into the recess 13A; there is no gas at the interface between the piston 5D and the insulating part 13 which creates depression.
  • FIG. 2 a switch closing operation has begun.
  • Crew 2 begins a closing race in direction D in the direction indicated by arrow F.
  • Contacts 2A and 2B are brought closer to contacts 3A and 3B and an electric arc is created first between the contacts arc 2B and 3B.
  • Current therefore flows from arcing contact 2B towards the arcing contact 3B.
  • the distance dAX is large enough to avoid arcing electric between the auxiliary arcing contacts 7A and 7B.
  • the current therefore crosses the rod of the arcing contact 3B and the resistance R which is inserted into the electrical circuit of the switch.
  • the 2D nozzle was moved at the same time as the 2A contacts and 2B and struck the bead 5A on the surface tapered from the front end of block 5.
  • this conical end of block 5 was first inserted gradually in the tulip-shaped diverging of the 2D nozzle which means that it will be set in motion without oscillations due to shock.
  • Arc contact auxiliary 7A approaches the auxiliary arcing contact 7B until the distance dAX is small enough to that an electric arc is created between these two contacts.
  • This connection between the two contacts 7A and 7B short-circuits resistance R the current therefore crosses the 2B arcing contact, 3B arcing contact, contacts accordion 6, metal block 5, arcing contact auxiliary 7A, auxiliary arcing contact 7B, tube 8, accordion contacts 8A and tube 9.
  • FIG. 6 the switch is completely closed.
  • the contacts 2A, 2B and 7A are connected to contacts 3A, 3B and 7B respectively, the connection of the current contacts permanent 2A and 3A established after connection of auxiliary arcing contacts 7A and 7B.
  • block 5 a still been pushed in the direction of arrow F by the 2D nozzle and the spring 12 has been further compressed.
  • the spring 15 has relaxed and exerted a restoring force which moved the tube 8 and therefore the contacts 3A and 7B in the opposite direction to arrow F.
  • the tube 8 therefore returned to the position he occupied on the Figure 1 when the switch was fully open.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Keying Circuit Devices (AREA)
EP99402150A 1998-09-09 1999-08-31 Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit Expired - Lifetime EP0986081B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9811244 1998-09-09
FR9811244A FR2783088B1 (fr) 1998-09-09 1998-09-09 Interrupteur avec un systeme d'insertion d'une resistance a longue duree d'insertion

Publications (2)

Publication Number Publication Date
EP0986081A1 true EP0986081A1 (de) 2000-03-15
EP0986081B1 EP0986081B1 (de) 2006-05-24

Family

ID=9530253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99402150A Expired - Lifetime EP0986081B1 (de) 1998-09-09 1999-08-31 Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit

Country Status (6)

Country Link
US (1) US6239399B1 (de)
EP (1) EP0986081B1 (de)
CN (1) CN1135584C (de)
CA (1) CA2281971C (de)
DE (1) DE69931441D1 (de)
FR (1) FR2783088B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4235340B2 (ja) * 2000-04-04 2009-03-11 キヤノン株式会社 情報処理装置及び情報処理方法
US7473863B2 (en) * 2003-02-06 2009-01-06 Cooper Technologies Company High voltage operating rod sensor and method of making the same
US7078643B2 (en) * 2003-12-15 2006-07-18 Rostron Joseph R Capacitor switch with internal retracting impedance contactor
FR2953639B1 (fr) * 2009-12-09 2012-01-13 Areva T & D Sas Disjoncteur a haute tension a ecran amovible pour l'amelioration du gradient de champ
CN104299841B (zh) * 2014-04-25 2016-11-23 国家电网公司 灭弧室及使用该机构的断路器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737937A1 (fr) * 1995-08-18 1997-02-21 Gec Alsthom T & D Sa Disjoncteur a double mouvement avec resistance de fermeture
FR2751781A1 (fr) * 1996-07-24 1998-01-30 Gec Alsthom T & D Sa Disjoncteur avec insertion temporaire de resistance a la fermeture

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450501A1 (fr) * 1979-03-02 1980-09-26 Alsthom Cgee Dispositif d'insertion de resistance a la fermeture d'un appareil d'interruption
US4393291A (en) * 1979-10-12 1983-07-12 Brush Switchgear Limited Gas blast interrupters
FR2649531B1 (fr) * 1989-07-04 1995-11-10 Alsthom Gec Disjoncteur a haute ou moyenne tension
FR2676587B1 (fr) * 1991-05-17 1994-06-10 Alsthom Gec Disjoncteur a grand pouvoir de coupure.
FR2737936B1 (fr) * 1995-08-18 1997-09-19 Gec Alsthom T & D Sa Disjoncteur muni d'une resistance de fermeture avec dispositif d'insertion
FR2748597B1 (fr) * 1996-05-13 1998-06-12 Gec Alsthom T & D Sa Disjoncteur a haute tension avec insertion de resistance a la fermeture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737937A1 (fr) * 1995-08-18 1997-02-21 Gec Alsthom T & D Sa Disjoncteur a double mouvement avec resistance de fermeture
FR2751781A1 (fr) * 1996-07-24 1998-01-30 Gec Alsthom T & D Sa Disjoncteur avec insertion temporaire de resistance a la fermeture

Also Published As

Publication number Publication date
CA2281971C (fr) 2004-06-15
FR2783088A1 (fr) 2000-03-10
US6239399B1 (en) 2001-05-29
CN1248780A (zh) 2000-03-29
CN1135584C (zh) 2004-01-21
EP0986081B1 (de) 2006-05-24
CA2281971A1 (fr) 2000-03-09
FR2783088B1 (fr) 2000-10-13
DE69931441D1 (de) 2006-06-29

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