EP0884745A1 - Leistungsschalter mit einem Einschaltwiderstand - Google Patents

Leistungsschalter mit einem Einschaltwiderstand Download PDF

Info

Publication number
EP0884745A1
EP0884745A1 EP98401355A EP98401355A EP0884745A1 EP 0884745 A1 EP0884745 A1 EP 0884745A1 EP 98401355 A EP98401355 A EP 98401355A EP 98401355 A EP98401355 A EP 98401355A EP 0884745 A1 EP0884745 A1 EP 0884745A1
Authority
EP
European Patent Office
Prior art keywords
contacts
circuit breaker
semi
closing
arcing
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
EP98401355A
Other languages
English (en)
French (fr)
Other versions
EP0884745B1 (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
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 EP0884745A1 publication Critical patent/EP0884745A1/de
Application granted granted Critical
Publication of EP0884745B1 publication Critical patent/EP0884745B1/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 circuit breaker comprising a first contact permanent and a first arcing contact fixedly mounted in an enclosure, a second permanent contact and a second arcing contact mounted mobile in the envelope in a certain longitudinal direction and intended to cooperate with the first fixed contacts and a resistor insertion system closing, the second movable contacts being part of a crew carrying a blowing nozzle.
  • the object of the invention is to propose a system for inserting the closing resistance for such a circuit breaker which is of a simple design and which allows to obtain a good compactness of the assembly with a minimum moving parts.
  • the invention relates to such a circuit breaker characterized in that that said closing resistance insertion system comprises a block semi-mobile which is arranged to be moved, during a closing operation, by the blowing nozzle in said longitudinal direction and which carries a third arcing contact intended to cooperate with a fourth fixed arcing contact connected to the fixed permanent contact, this semi-mobile block by its displacement, bringing the third and fourth arcing contacts together to short-circuit this closing resistance while said first and second arcing contacts are connected to each other and that the permanent contacts are separated from each other, these permanent contacts being connected to each other only after the third and fourth arcing contacts are themselves connected to each other.
  • the semi-mobile block has a conical end which fits into the blowing nozzle in the shape of a tulip during the closing operation of the circuit breaker.
  • the effects of the shock between the nozzle and the block are eliminated.
  • semi-mobile when they come into contact with each other and we get a displacement speed of the semi-mobile unit identical to that of the first movable contacts when the circuit breaker closes.
  • the semi-mobile block has a tubular shape and has a spring which is compressed on closing of the circuit breaker and a chamber that fills with gas during this closing operation so that when the circuit breaker opens, the spring by relaxing automatically moves the semi-movable block in the direction of movement of the first arcing contacts and permanent to separate the third and fourth arcing contacts.
  • the displacement of this semi-mobile block the opening of the circuit breaker is delayed and slowed down compared to displacement of the first arcing contacts and permanent because the spring relaxation is accompanied by a necessary evacuation of gas from the chamber by calibrated openings.
  • circuit breaker An exemplary embodiment of the circuit breaker according to the invention is described below in more detail and illustrated in the drawings.
  • Figure 1 very schematically shows a circuit breaker according to the invention in the fully open position.
  • Figure 2 very schematically shows the circuit breaker of Figure 1 in a first intermediate closed position.
  • Figure 3 shows very schematically the circuit breaker of Figure 1 in a second intermediate closed position.
  • Figure 4 very schematically shows the circuit breaker of Figure 1 in a fully closed position.
  • Figure 5 shows very schematically the circuit breaker of Figure 1 in a first intermediate opening position.
  • Figure 6 shows very schematically the circuit breaker of Figure 1 in a second intermediate open position.
  • the circuit breaker partially shown in the figures includes a insulating casing 1 of cylindrical shape, for example of porcelain, which delimits an interior volume 2 intended to be filled with a dielectric gas as SF6 under a pressure of a few bars.
  • This circuit breaker is a single movement circuit breaker, i.e. with a single movable equipment of arcing and permanent contacts, and includes a insertion system of a closing resistor whose arrangement allows simply control the duration of insertion of the closing resistance of the circuit breaker, this resistor should not be inserted when the circuit breaker.
  • the closing resistor 4 consists of a stack of resistors housed in an insulating support 5 placed inside the enclosure to one end of it. Closing resistor 4 is in electrical contact with a metal block 6 on which is fixed a metal rod 7 which extends axially in the envelope. In the embodiment shown in the figures, the closing resistor 4 extends axially in the envelope but one could also provide an eccentric arrangement of this resistance in the envelope without departing from the scope of the invention.
  • the fixed arcing contact 8 is disposed at the free end of the rod 7.
  • the fixed permanent contact 9 is arranged at one end of a metal tube 9A arranged coaxially around the rod 7.
  • An insulating cone 10 is provided so optional to hold the rod 7 inside the tube 9A.
  • the closing resistor 4 insertion system comprises a block semi-mobile metallic 14 of tubular shape which is mounted to be able slide on the rod 7, that is to say along the axis 3.
  • This semi-mobile block 14 is electrically connected to the rod 7 by sliding contacts 17. It carries a arcing contact 15 subsequently called first switching contact in the form of tulip which is intended to cooperate with another arcing contact 16 in the form ring (hereinafter called second switching contact) disposed at inside the cylindrical tube 9A and electrically connected thereto.
  • the arrangement of the resistance insertion system is essentially arranged axially in the envelope which can therefore have a relatively small diameter.
  • the semi-mobile block 14 has one end, which faces the blowing nozzle 13, cone-shaped adapted to come fit into the nozzle.
  • the other end face (left face on the figures) of the semi-mobile block 14 closes behind a compression piston 18 which is constituted by a crown secured to the rod 7.
  • a spring 20 is mounted between the piston 18 and a shoulder located at rear of the conical end of the semi-movable block.
  • the space defined between this piston and this other end face constitutes a chamber 19 with volume variable.
  • Chamber 19 in the semi-mobile block communicates with the volume inside the tube 9A through openings 21.
  • FIG. 1 the circuit breaker is in the fully open position.
  • the fixed contacts 8 and 9 are separated from mobile contacts 11 and 12.
  • Contact 15 is separated from contact 16.
  • the spring 20 in the semi-movable block is completely relaxed and the space between the piston 18 and the left face of the semi-mobile block is minimum.
  • the arcing contacts 8 and 11 are less distant by construction from each other than permanent contacts 9 and 12 ce which means that when the circuit breaker closes, the contacts 8 and 11 are connected mutually before contacts 9 and 12.
  • the contacts of switching 15 and 16 are distant from each other by a distance such that these contacts connect to each other after connecting the arcing contacts but before the connection of the permanent contacts which allows control, via the displacement of the semi-mobile block, the duration of the insertion of the resistor 4 at the closing as we will see later.
  • the chamber 19 is filled gas passing through the openings 21.
  • the arcing contacts 8 and 11 are connected to each other while the switching contacts 15 and 16 are just close enough to each other to that an electric arc 22 can be created between them without an electric arc can be created between permanent contacts 9 and 12. Indeed, the latter are at this time distant from each other by a greater distance than that separating the switching contacts.
  • the closing resistance 4 is short-circuited since the current flows between the arcing contacts 11 and 8, in the rod 7, in the sliding contacts 17, in the semi-mobile block 14, in switching contact 15, in switching contact 16 and in the tube 9A.
  • the movable contacts 11 and 12 are move from left to right in the figures. Permanent contacts 9 and 12 separate first from each other, then then the arcing contacts 8 and 11 but the switching contacts 15 and 16 always remain connected for some time to each other as shown in Figures 5 and 6 because the block semi-mobile moves more slowly than mobile contacts. In fact, the block semi-mobile moves from left to right in the figures by the action of the spring 20 which exerts a restoring force by relaxing against the piston 18.
  • the relaxation of the spring 20 is delayed and slowed down by the fact that a force opposite of resistance opposes the restoring force exerted by the spring, this contrary force resulting from the necessary compression of gas in the chamber 19 whose volume decreases as the semi-movable block moves because the gas exhaust openings in this chamber are calibrated so adequate.
  • This calibration is such that the switching contacts 15 and 16 are only separate from each other after complete separation of the contacts arc. In this way, the short-circuit current cannot pass through the closing resistance 4 when opening the circuit breaker. It's only when the electric arc created between the arcing contacts is blown out in particular that the semi-mobile block 14 finishes its race to separate the contacts 15 and 16 and return to its initial position illustrated in FIG. 1.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Keying Circuit Devices (AREA)
  • Cookers (AREA)
EP98401355A 1997-06-12 1998-06-08 Leistungsschalter mit einem Einschaltwiderstand Expired - Lifetime EP0884745B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9707284A FR2764728B1 (fr) 1997-06-12 1997-06-12 Disjoncteur a resistance de fermeture
FR9707284 1997-06-12

Publications (2)

Publication Number Publication Date
EP0884745A1 true EP0884745A1 (de) 1998-12-16
EP0884745B1 EP0884745B1 (de) 2004-03-17

Family

ID=9507893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401355A Expired - Lifetime EP0884745B1 (de) 1997-06-12 1998-06-08 Leistungsschalter mit einem Einschaltwiderstand

Country Status (9)

Country Link
US (1) US5955715A (de)
EP (1) EP0884745B1 (de)
CN (1) CN1089939C (de)
AT (1) ATE262216T1 (de)
BR (1) BR9802002A (de)
CA (1) CA2239239C (de)
DE (1) DE69822369T2 (de)
FR (1) FR2764728B1 (de)
RU (1) RU2157016C2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887070B1 (fr) * 2005-06-10 2008-11-07 Areva T & D Ag Commutateur electrique comportant un contact fixe annulaire
DE502007004867D1 (de) * 2007-09-10 2010-10-07 Abb Technology Ag Einschaltwiderstand für Hochspannungsleistungsschalter
FR2922354B1 (fr) * 2007-10-15 2009-12-11 Areva T & D Sa Disjoncteur a deux chambres de coupure alignees, a transmission commune et encombrement reduit
CN101409176B (zh) * 2008-12-04 2011-12-07 天水长城开关厂有限公司 一种真空断路器用主回路结构
US9305726B2 (en) * 2014-08-27 2016-04-05 Eaton Corporation Arc extinguishing contact assembly for a circuit breaker assembly
CN109872885A (zh) * 2017-12-04 2019-06-11 江苏大全封闭母线有限公司 一种动静触头插拔限位机构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3411445A1 (de) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hochspannungsschalter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596575B1 (fr) * 1986-03-26 1988-05-20 Alsthom Disjoncteur a gaz dielectrique sous pression
FR2629260B1 (fr) * 1988-03-23 1994-07-08 Alsthom Disjoncteur a haute tension a faible energie de manoeuvre
FR2657459A1 (fr) * 1990-01-19 1991-07-26 Alsthom Gec Disjoncteur a haute tension a resistance de fermeture.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3411445A1 (de) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hochspannungsschalter

Also Published As

Publication number Publication date
FR2764728A1 (fr) 1998-12-18
RU2157016C2 (ru) 2000-09-27
CA2239239A1 (fr) 1998-12-12
DE69822369T2 (de) 2005-03-17
EP0884745B1 (de) 2004-03-17
FR2764728B1 (fr) 1999-09-24
US5955715A (en) 1999-09-21
CN1089939C (zh) 2002-08-28
CN1202716A (zh) 1998-12-23
ATE262216T1 (de) 2004-04-15
BR9802002A (pt) 1999-10-19
DE69822369D1 (de) 2004-04-22
CA2239239C (fr) 2004-01-13

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