EP0986081B1 - Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit - Google Patents

Hochspannungsschalter mit Widerstandeinschaltssytem über langere Zeit Download PDF

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Publication number
EP0986081B1
EP0986081B1 EP99402150A EP99402150A EP0986081B1 EP 0986081 B1 EP0986081 B1 EP 0986081B1 EP 99402150 A EP99402150 A EP 99402150A EP 99402150 A EP99402150 A EP 99402150A EP 0986081 B1 EP0986081 B1 EP 0986081B1
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EP
European Patent Office
Prior art keywords
contact
interrupter
block
longitudinal axis
along
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.)
Expired - Lifetime
Application number
EP99402150A
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English (en)
French (fr)
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EP0986081A1 (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
Areva T&D SAS
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Publication date
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Publication of EP0986081A1 publication Critical patent/EP0986081A1/de
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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

  • a compressed gas switch in particular a high-voltage circuit breaker, comprising in a casing extending in a longitudinal direction, a first pair of contacts including a first permanent current contact and a first arc contact. a second movable contact assembly in the longitudinal direction with respect to the first pair of contacts and including a second permanent contact and a second arcing contact for respectively connecting to the first permanent contact and the first arcing contact; and a system for inserting a resistor when closing the switch, this resistor being electrically connected in series between the first arcing contact and the first permanent current contact.
  • FR2751781 discloses a device according to the preamble of claim 1.
  • Such a resistor serves to limit the effects of transient currents on the network when the switch is closed.
  • this resistor is inserted when an electrical connection between the arcing contacts is established when the switch is closed and is short-circuited before the connection between the permanent current contacts is established. When opening the switch, the resistor must not be inserted.
  • the duration of insertion of this resistance can vary from one installation to another. This duration is generally dependent on the speed at which the mobile contact crew is moved. Some switches make it possible to obtain an insertion time of the order of 6 ms for a traveling speed of the mobile contact crew of the order of 4 m / s. Some installations require the use of switches to achieve a much longer insertion time of the resistance, of the order of 14 ms.
  • An object of the invention is to propose a system for inserting a resistor making it possible to obtain a duration of insertion of the important resistance.
  • Another object of the invention is to propose a system for inserting a closure resistor that is compact and requires few parts.
  • the invention relates to a compressed gas switch according to claim 1.
  • the first arcing contact has the shape of a rod on which slides a metal block carrying the second auxiliary contact and this block is pushed in the longitudinal direction, when closing the switch, by a nozzle integral with the second arc contact.
  • the duration of insertion of the resistor can be adjusted to the moving speed of the moving contact crew.
  • the block has a substantially conical end which fits into the nozzle. In this way, it eliminates the shock effect on the block when closing the switch, which helps to move the block at the same speed as the moving contact.
  • the block comprises a tubular extension which extends in the longitudinal direction and on which slides an insulating part integral with the first auxiliary contact, the tubular extension having an end forming a piston which cooperates with a recess in the insulating part in such a way that the piston is made integral with the insulating part, when the switch is closed, by the play of a depression created in the recess of the insulating part between the piston and the insulating part.
  • the auxiliary contacts are linked in displacement, when closing the switch, by a simple pneumatic suction system that requires no linkage.
  • the block comprises an internal chamber which is divided by a radial shoulder of the rod of the first arcing contact, and in which a spring is placed in the chamber against the radial shoulder of the rod such that the movement of the block along the rod of the first arc contact, when closing the switch, causes the compression of the spring at the same time that the chamber fills with gas and that, when opening the switch, the spring while relaxing exerts a force of return which tends to automatically move the block in the opposite direction at the same time as the gases are discharged from the chamber through an orifice thereof, the orifice being further calibrated so that resistance is exerted against the return force spring.
  • the first auxiliary contact and the first permanent current contact are mounted integral on a tube movable in the longitudinal direction, and in which a spring is arranged against the tube mobile to oppose the displacement of this tube in the longitudinal direction, when closing the switch, the spring exerting a restoring force when opening the switch which tends to automatically move the tube in said direction longitudinal and in a contrary direction.
  • the switch shown is a switch used for the very high voltage. It comprises in an insulating or metal casing 1 of substantially cylindrical shape, for example of porcelain, which extends in a longitudinal direction D, a first movable contact crew 2 in the direction D and a second crew of contacts 3.
  • the envelope is normally filled with a dielectric gas such as SF6 at a pressure of a few bars to form a breaking chamber.
  • the switch shown in the figures has a symmetry of revolution in the direction D.
  • the switch comprises at the end of the interrupting chamber on the side of the contacting equipment 3, a resistor R which is conventionally inserted in the electrical circuit of the switch when the latter is closed.
  • the mobile contact equipment 2 includes a permanent current contact 2A in the form of a ring of metal fingers and a hollow arc contact 2B which is also in the form of a ring of metal fingers, the contact of hollow arc 2B being arranged coaxially with the contact 2A in the direction D.
  • These movable contacts 2A and 2B are carried by a tube 2C equipped with a piston (not shown) of compression of the gas for the extinction of the arc at the opening of the switch as is well known.
  • the tube 2C also carries a 2D gas channel nozzle whose diverging, which is coaxial with the contacts 2A and 2B in the direction D, opens with a tulip diverging on the side of the crew of contacts 3.
  • the crew contact 2A, 2B with the 2D nozzle is moved in translation in the direction D by an actuator of the not shown switch.
  • the contact equipment 3 comprises a permanent current contact 3A which is in the form of a ring of metal fingers arranged coaxially in the direction D at the crown. of fingers of the contact 2A and an arc contact having the shape of a rod 3B (possibly hollow) which extends in the direction D coaxially to the finger ring of the contact 2B.
  • the rod-shaped arc contact 3B is inserted in the moving hollow arc contact 2B through the 2D nozzle and the contact 3A engages the contact 2A.
  • the resistor R is held 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 electrically connected in series between the arcing contact 3B and the contact. permanent current 3A although this does not appear in the figures.
  • a metal block 5 is slidably mounted on the rod 3B in electrical contact therewith via accordion contacts 6.
  • the block 5 has an end of substantially conical shape adapted to be inserted into the diverging neck of the nozzle and has on the outer surface of this conical end a peripheral bead 5A on which abuts the edge of the diverging opening of the nozzle 2D.
  • This block 6 carries a first auxiliary arc contact 7A which is in the form of a crown of fingers and which cooperates with a second auxiliary arc contact 7B in the form of a tube, these two auxiliary arc contacts 7A and 7B serving to short-circuit the resistor R when closing the switch.
  • the fingers of the contact 7A extend in the direction D towards the resistor R and the tube of the contact 7B extends in the opposite direction, that is to say toward the mobile contact crew 2.
  • the auxiliary contact 7B is electrically connected to the permanent current contact 3A via a metal tube 8 which is mounted to move in the direction D in the envelope 1, on another metal tube 9 fixed in the envelope and which surrounds the resistor R.
  • the metal tube 8 is in electrical contact with the metal tube 9 via sliding contacts 8A.
  • the block 5 which carries the auxiliary contact 7A comprises an internal chamber 10 which is penetrated in a sealed manner by the rod 3B of the fixed arc contact of the crew 3, on which it slides.
  • This chamber 10 is divided by a radial shoulder 11 of the rod 3B (forming a kind of piston) on which a spring 12 rests.
  • the chamber 10 comprises calibrated orifices 5B allowing exhaust gases inside the chamber 10.
  • the spring 12 is compressed when the block 5 is moved in direction D from top to bottom in FIG.
  • the block 5 is extended by a tubular portion 5C which extends in the direction D surrounding the rod 3B.
  • An insulating part 13 is slidably mounted on this tubular portion 5C.
  • the tubular portion 5C has a perimeter widening which forms a piston 5D adapted to come into a recess 13A complementary to the part 13.
  • the piston 5D comprises valves 5E oriented so that the gases in the recess 13A can be released from this obviously when the 5D piston fits into this obviously.
  • the piece 13 is secured to the tube 8 by means of an insulating support cone 14 so that the tube 8 and thus the contacts 3A and 7B are integral in movement in the 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 in FIG. 1.
  • the stroke of the tube 8 from above bottom in Figure 1 is stopped by a stop formed by the end of the tube 9 and the insulating cone 14.
  • the auxiliary arcing contacts 7A and 7B are separated by a distance dAX which can be used to adjust the duration of insertion of the resistor. closing the switch.
  • this duration of insertion of the resistance can be regulated by the distance dax 'which corresponds to the stroke of the tube 8 until the insulating cone abuts against the edge of the tube 9.
  • the switch is in fully open position.
  • the contacts 2A, 2B and 7A are respectively separated from the contacts 3A, 3B and 7B.
  • the piston 5D is fully depressed in the recess 13A; there is no gas at the interface between the piston 5D and the insulating part 13 which creates a vacuum.
  • FIG. 2 a closing operation of the switch has begun.
  • Crew 2 starts a closing stroke in the direction D in the direction indicated by arrow F.
  • the contacts 2A and 2B are brought closer to the contacts 3A and 3B and an electric arc is first created between the arcing contacts 2B and 3B.
  • the current thus passes from the arc contact 2B to the arc contact 3B.
  • the distance dax is large enough to prevent arc initiation between the auxiliary arc contacts 7A and 7B.
  • the current thus passes through the rod of the arcing contact 3B and the resistor R which is inserted into the electrical circuit of the switch.
  • the 2D nozzle was moved at the same time as the contacts 2A and 2B and hit the bead 5A on the conical surface of the front end of the block 5.
  • this conical end of the block 5 is first gradually inserted into the divergent tulip-shaped nozzle 2D so that its setting in motion will be made without oscillations due to impact.
  • the auxiliary arc contact 7A approaches the auxiliary arc contact 7B until the distance dax is sufficiently small to create an electric arc between these two contacts.
  • This connection between the two contacts 7A and 7B bypasses the resistance R the current thus passes through the arc contact 2B, the arc contact 3B, the accordion contacts 6, the metal block 5, the auxiliary arc contact 7A , the auxiliary arc contact 7B, the tube 8, the accordion contacts 8A and the tube 9.
  • the switch is completely closed.
  • the contacts 2A, 2B and 7A are connected to the contacts 3A, 3B and 7B respectively, the connection of the permanent current contacts 2A and 3A being established after the connection of the auxiliary arcing contacts 7A and 7B.
  • the block 5 has been pushed in the direction of the arrow F by the 2D nozzle and the spring 12 has been compressed again.
  • 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 the arrow F.
  • the tube 8 has returned to the position it occupied in Figure 1 when the switch was fully open.
  • the crew 2 When opening the switch, the crew 2 is moved at high speed in the opposite direction to the arrow F with the nozzle 2D.
  • the permanent current contacts 2A and 3A separate first, then the arc contacts 2B and 3B.
  • the block 5 no longer undergoing the thrust of the 2D nozzle moves automatically in the same direction as the moving assembly 2 by the play of the restoring force exerted by the spring 12 (which relaxes) at the same time as the gas in the chamber 10 of the block 5 is evacuated by the orifices 5B.
  • These orifices are calibrated as indicated above so as to exert resistance to the return force of the spring 12 so that the block 5 moves more slowly than the crew 2 in the direction opposite to the arrow F.
  • the auxiliary arcing contacts 7A and 7B remain connected for some time after the separation of the arcing contacts 2B and 3B so that the resistor also remains short-circuited. when opening the switch.
  • the piston 5D is inserted again into the recess 13A of the insulating part 13 and the gases at the interface of the piston 5D and the insulating part 13 are driven out by the valve 5E.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Keying Circuit Devices (AREA)

Claims (6)

  1. Druckgasschalter, der in einer Ummantelung (1), welche sich in einer Longitudinalrichtung (D) erstreckt, einen ersten Kontaktsatz (3) aufweist, der einen ersten Gleichstromkontakt (3A) und einen ersten Bogenkontakt (3B) umfasst, und einen zweiten Kontaktsatz (2), der in der Longitudinalrichtung in Bezug auf den ersten Kontaktsatz beweglich ist und einen zweiten Gleichstromkontakt (2A) sowie einen zweiten Bogenkontakt (2B) aufweist, die jeweils mit dem ersten Gleichstromkontakt und dem ersten Bogenkontakt zu verbinden sind, und ein System zum Einfügen eines Widerstands (R) beim Schließen des Schalters, wobei dieser Widerstand zwischen dem ersten Bogenkontakt (3B) und dem ersten Gleichstromkontakt (3A) elektrisch in Reihe geschaltet ist, wobei das Widerstandseinfügesystem zwei Hilfskontakte umfasst, von denen der erste (7B) mit dem ersten Gleichstromkontakt (3A) elektrisch verbunden ist und der zweite (7A) mit dem ersten Bogenkontakt (3B) verbunden ist, und diese beiden Hilfskontakte beweglich zueinander in einer Longitudinalrichtung derart angebracht sind, dass sie sich beim Schließen des Schalters einander annähern können, um eine Verbindung herzustellen, welche den Widerstand kurzschließt, dadurch gekennzeichnet, dass die Hilfskontakte bei ihrer Bewegung in der Longitudinalrichtung während des Schließens des Schalters vor Beginn des Verbindungsvorgangs, welcher den Widerstand kurzschließt, einstückig bzw. fest miteinander verbunden sind.
  2. Schalter nach Anspruch 1, wobei der erste Bogenkontakt die Form einer Stange aufweist, auf der ein Metallblock (5) gleitet, welcher den zweiten Hilfskontakt trägt, und wobei dieser Block in der Longitudinalrichtung beim Schließen des Schalters durch eine mit dem zweiten Bogenkontakt einstückige Düse (2D) gedrückt wird.
  3. Schalter nach Anspruch 2, wobei der Block (5) ein im wesentlichen konisches Ende aufweist, das in die Düse (2D) eingesetzt ist.
  4. Schalter nach Anspruch 2, wobei der Block eine rohrförmige Verlängerung (5C) umfasst, die sich in der Longitudinalrichtung erstreckt und an der ein mit dem ersten Hilfskontakt einstückiges bzw. fest verbundenes Isolierstück (13) gleitet, wobei die rohrförmige Verlängerung ein Ende aufweist, das einen Kolben (5D) bildet, der mit einer Ausnehmung (13A) in dem Isolierstück derart zusammenwirkt, dass der Kolben beim Schließen des Schalters durch das Spiel einer in der Ausnehmung des Isolierstücks zwischen dem Kolben und dem Isolierstück geschaffenen Vertiefung einstückig mit dem Isolierstück gemacht wird.
  5. Schalter nach Anspruch 2, wobei der Block (5) eine innere Kammer (10) umfasst, die durch eine radiale Schulter der Stange des ersten Bogenkontakts unterteilt ist, und wobei eine Feder (12) in der Kammer gegen die radiale Schulter (11) der Stange derart angeordnet ist, dass die Bewegung des Blocks längs der Stange des ersten Bogenkontakts beim Schließen des Schalters die Komprimierung der Feder gleichzeitig mit einer Auffüllung der Kammer mit Gas hervorruft, und beim Öffnen des Schalters die Feder beim Entspannen eine Rückstellkraft ausübt, die dazu tendiert, den Block automatisch in umgekehrter Richtung gleichzeitig mit der Evakuierung der Gase aus der Kammer über eine Öffnung (5B) derselben zu verschieben, wobei die Öffnung außerdem so kalibriert ist, dass sie einen Widerstand gegen die Rückstellkraft der Feder ausübt.
  6. Schalter nach Anspruch 1, wobei der erste Hilfskontakt (7B) und der erste Gleichstromkontakt (3A) einstückig an einem beweglichen Rohr (8) in der Longitudinalrichtung angeordnet sind, und wobei eine Feder (15) gegen das bewegliche Rohr angeordnet ist, um der Verschiebung dieses Rohrs in der Longitudinalrichtung beim Schließen des Schalters entgegenzuwirken, wobei diese Feder eine Rückstellkraft beim Öffnen des Schalters ausübt, die dazu tendiert, das Rohr automatisch in der Longitudinalrichtung und in einer entgegengesetzten Richtung zu bewegen.
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
FR9811244A FR2783088B1 (fr) 1998-09-09 1998-09-09 Interrupteur avec un systeme d'insertion d'une resistance a longue duree d'insertion
FR9811244 1998-09-09

Publications (2)

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

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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

Family Cites Families (8)

* 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
FR2737937B1 (fr) * 1995-08-18 1997-09-19 Gec Alsthom T & D Sa Disjoncteur a double mouvement avec resistance de fermeture
FR2748597B1 (fr) * 1996-05-13 1998-06-12 Gec Alsthom T & D Sa Disjoncteur a haute tension avec insertion de resistance a la fermeture
FR2751781B1 (fr) * 1996-07-24 1998-09-04 Gec Alsthom T & D Sa Disjoncteur avec insertion temporaire de resistance a la fermeture

Also Published As

Publication number Publication date
CN1248780A (zh) 2000-03-29
CA2281971C (fr) 2004-06-15
EP0986081A1 (de) 2000-03-15
FR2783088B1 (fr) 2000-10-13
FR2783088A1 (fr) 2000-03-10
CN1135584C (zh) 2004-01-21
CA2281971A1 (fr) 2000-03-09
DE69931441D1 (de) 2006-06-29
US6239399B1 (en) 2001-05-29

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