EP2099047A1 - Agencement de contact d'usure et disjoncteur - Google Patents

Agencement de contact d'usure et disjoncteur Download PDF

Info

Publication number
EP2099047A1
EP2099047A1 EP08152197A EP08152197A EP2099047A1 EP 2099047 A1 EP2099047 A1 EP 2099047A1 EP 08152197 A EP08152197 A EP 08152197A EP 08152197 A EP08152197 A EP 08152197A EP 2099047 A1 EP2099047 A1 EP 2099047A1
Authority
EP
European Patent Office
Prior art keywords
contact
nozzle
connection space
gas
circuit breaker
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
EP08152197A
Other languages
German (de)
English (en)
Other versions
EP2099047B1 (fr
Inventor
Christian Franck
Martin Kriegel
Olaf Hunger
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Priority to EP20080152197 priority Critical patent/EP2099047B1/fr
Publication of EP2099047A1 publication Critical patent/EP2099047A1/fr
Application granted granted Critical
Publication of EP2099047B1 publication Critical patent/EP2099047B1/fr
Not-in-force 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
    • H01H33/91—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
    • 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
    • H01H2033/907—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 using tandem pistons, e.g. several compression volumes being modified in conjunction or sequential

Definitions

  • the invention relates to a AbbrandCountan extract for a circuit breaker and a circuit breaker comprising such Abbrandcardan whatsoever.
  • Circuit-breakers of the type described are used in the high and medium voltage range of power distribution systems.
  • Fig. 10 is a generic contact arrangement is known, in which the switching pin carries an annular plate which is located in the closed position just behind the throat of the nozzle and a terminal space, which follows the throat, is cylindrical and at the end facing away from the throat opening , dammed.
  • the plate backs up the gas, thereby preventing the pressurized gas from abruptly flowing past the contact pin out of the arc chamber as soon as the contact pin releases the throat.
  • the gas can only flow out when the plate is completely retracted from the terminal compartment. At this time, the distance between the contact pieces is already so large that there is no risk of re-ignition.
  • a thin-tip and thickened-shaft switching pin which is passed through a nozzle having one or more passages or throat areas, the cross-sections of the passages and tip being aligned with each other so that extinguishing gas can be stowed within the nozzle until the contact pin has reached a sufficient distance from the contact tube.
  • the invention is based on the object to provide a generic Abbrandtitlean angel, which can be controlled so that it has a better switching behavior, especially in the capacitive switching relatively small currents.
  • a circuit breaker should be specified, which has the same advantages.
  • the AbbrandCountan extract for a circuit breaker can be switched between a closed position and an open position and according to the invention comprises: a first contact piece and a second contact piece, which are in contact with each other in contact, an arc chamber, a nozzle of insulating material, which forms a throat, the preferred surrounds the second contact piece in the closed position, and with a following on the throat, facing away from the throat end open terminal space, with a relation to the terminal space or the nozzle displaceable gas retention element is present, which narrows in the closed position, the cross section of the terminal space, and which in the off position, the cross section of the terminal compartment largely and preferably fully releases, and wherein a position of the gas backflow element is controllable in the terminal compartment independently of the second contact piece.
  • the gas backflow element prevents a rapid flow at speeds which may lie in the supersonic range around the tip of the contact pin as soon as the contact pin is withdrawn. Due to the independently controllable positioning of the gas flashback element in the terminal space adjoining the nozzle passage, a certain adjustable volume is made available to the quenching gas and a moderate, controllable extinguishing gas flow is permitted and at the same time an excessive pressure drop and density drop of the quenching gas are prevented.
  • the gas retention element in the on position, the cross section of the terminal compartment largely and in particular completely block or dam, and / or the gas retention element can completely release the cross section of the terminal compartment in the off position.
  • the second contact piece is displaceable independently of the gas retention element, and / or the gas retention element is independent of the second contact piece, in particular the same or opposite to this, displaced.
  • a position of the gas backflow element independently of the nozzle, in particular rectified and / or opposite to the nozzle be movable.
  • the gas backup element can be firmly connected to a housing of the circuit breaker.
  • the volume of the free part of the connection space can be increased later or slower than would be possible with a rigid coupling of the blocking element to the contact pin.
  • Another object of the invention is a circuit breaker with such AbbrandCountanordung and a method for power interruption with such Abbrandcardanordung, wherein a Gasschreibstau- or blocking element in the connection space between Düsenengnis and exhaust is present and obstructs at least temporarily during a switching operation, the gas outflow from the Düsenengnis and thereby keeps the density of the extinguishing gas in the arc zone high.
  • the Abbrandnessan extract according to independent claim 1 according to the invention comprises a relative to the connection space 7 or the nozzle 2 displaceable gas retention element 19, which narrows the cross section of the connection space 7, z. B. by forming a planar cross-sectional constriction in the connection space, and which releases the cross-section of the connection space 7 in the off position, z. B. by being outside the terminal compartment 7.
  • the features of the dependent claims are optional and indicate preferred embodiments in any combination.
  • Fig. 1 an example of a part of a circuit breaker is shown, which comprises a central Abbrandcardan extract and cooperating with this pressure generating device and an outer rated current contact arrangement. Parts of the circuit breaker are shown only as far as they are essential for the function of Abbrandcardan nie.
  • the consumable contact arrangement comprises a first contact piece designed as a contact tube 1 slotted in the end region, a fixedly connected to the same nozzle 2, which consists of an insulating material, and designed as a contact pin 3 second contact piece.
  • An end portion of the contact tube 1 is surrounded by a sleeve 4, which also consists of an insulating material.
  • the nozzle 2 forms a continuous central opening, which comprises an arc chamber 5, which extends when switching off between the first contact piece 1 and the second contact piece 3 and to which a cylindrical throat 6 adjoins.
  • the opening On the side facing away from the arc chamber 5 side of the throat 6, the opening, forming a typically conical transition zone or diffuser expands to a preferably cylindrical terminal compartment 7 of larger diameter, which is open at the opposite, the throat 6 opposite end by the den Connection space 7 enclosing wall breaks off as shown or another room of larger cross-section connects.
  • the nozzle can also have a plurality of passages, wherein the nozzle in turn merges into an expanding opening, which forms a transition zone or an end diffuser or main diffuser, to which the connection space adjoins.
  • the transition zone is typically conical, but may also have a different contour.
  • the damming by the inventive backflow element 19 for the backflow of quenching gas takes place mainly or preferably in the connection space 7, which is separated from the nozzle groove 6 through the end-side diffuser.
  • throat 6 and connection space 7 may be made of the same material and, in particular, in one piece.
  • the nozzle 2 may comprise the throat 6 and the connection space 7, the connection space 7 being widened with respect to the throat 6 and preferably extended continuously.
  • the contact pin 3 protrudes in the closed position (above) through the connection space 7 and with a small lateral distance to the nozzle 2 through the throat 6 and further through the arc chamber 5.
  • the tip of the contact pin 3 is located inside the contact tube 1 and fills the cross section just behind its end, where the cross section is the smallest, from, so that the contact tube 1, the contact pin 3 slightly behind the tip touches from the outside and thus contacted. In the off position (below), the tip of the contact pin 3 is approximately in the rear region of the connection space. 7
  • a first tubular rated current contact 8 connects, which surrounds the contact tube 1 at a distance, so that between these parts a heating chamber 9 of a pressure generating device is located, which is connected via an annular channel 10 in the nozzle 2 with the arc chamber 5.
  • the heating chamber 9 is separated from a compression chamber 12 by a connecting wall 11 connecting the contact tube 1 to the first rated current contact 8, which has openings provided with check valves.
  • the pressure generating device further comprises a fixedly connected to the housing of the circuit breaker annular piston 13 which limits the compression space 12 at its end facing away from the intermediate wall 11 end.
  • a second tubular rated current contact 14 which surrounds the nozzle 2 at a distance and overlaps in the closed position with the first rated current contact 8 and touches it from the outside and contacted.
  • the second rated current contact 14 carries inside a transverse wall 15 with a central opening through which the contact pin 3 is guided. Protrudes through another opening a rod 16 which is fixedly connected via a ring 17 with the nozzle 2.
  • the illustrated part of the circuit breaker is surrounded by a non-illustrated tubular housing at a distance.
  • the housing includes an exhaust space, with which the arc chamber 5 is connected through the interior of the contact tube 1 and also via the throat 6 and the terminal compartment 7. Further, it contains a drive to which the contact tube 1 is connected and the first rated current contact 8 and To the dme contact tube attached nozzle 2.
  • the drive is further operatively connected to a gear that drives the pin 3.
  • an off which transfers the circuit breaker and in particular the AbbrandWalletan whatsoever from the on state to the off state, the drive to the contact tube 1 and the parts connected to it on the one hand and, on the other hand, via the gear, the contact pin 3 opposite movements.
  • Fig. 2 shows an embodiment which differs slightly from the above-described only insofar as the gas retention element 19 is not fixed to the housing of the circuit breaker is connected, but via a carried out by the transverse wall 15 stabfömigen carrier 18 'with another, also operatively connected to the drive gearbox.
  • the position of the gas retention element 19 can be controlled independently of the nozzle 2 and / or the second contact piece 3, resulting in an overall somewhat more complicated construction.
  • FIG. 3a-f the circuit breaker will be switched off in accordance with the conditions specified in Fig. 1 illustrated first embodiment, in which a capacitor bank is disconnected from the network.
  • Fig. 4 which on the time axis also references to some of the FIGS. 3a-f contains, which each show the circuit breaker in a position corresponding to the time.
  • the contact pin 3 In the course of further movement of the contact tube 1 and the onset of opposite movement of the contact pin 3, the contact pin 3 is completely pulled out of the contact tube 1 and separated to form an arc from the contact tube 2 ( Fig. 3c ).
  • the arc extinguishes at the next current zero crossing under the action of the from the compression chamber 12 via the heating chamber 9 and the annular channel 10 in the arc chamber 5 and through the contact tube 1 in the Exhaust space flowing extinguishing gas.
  • the capacitor bank maintains its voltage, which corresponds to the full line voltage because of the phase shift of 90 ° between current and voltage at the current zero crossing.
  • the embodiment shown offers the possibility of controlling the position of the gas retention element 19 independently of the nozzle 2 and / or independently of the second contact piece 3.
  • the gas retention element 19 can first be moved in the same direction as the nozzle 2, either so that they completely follows their movement or something remains, so that the shared part of the terminal compartment 7 at first not or only slowly increases and hardly any flow from Arc space 5 occurs in the terminal compartment 7.
  • the movement of the gas flashback element 19 can be stopped or the gas flashback element 19 in the opposite direction - ie in the same direction as the contact pin 3 - moves and withdrawn from the terminal compartment 7.
  • the circuit breaker can z. B. a blow piston switch, a Disposable, further a high or medium voltage switch, and a switch with a single movement of a contact piece or with dual drive for both contacts.

Landscapes

  • Circuit Breakers (AREA)
EP20080152197 2008-03-03 2008-03-03 Agencement de contact d'usure et disjoncteur Not-in-force EP2099047B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20080152197 EP2099047B1 (fr) 2008-03-03 2008-03-03 Agencement de contact d'usure et disjoncteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080152197 EP2099047B1 (fr) 2008-03-03 2008-03-03 Agencement de contact d'usure et disjoncteur

Publications (2)

Publication Number Publication Date
EP2099047A1 true EP2099047A1 (fr) 2009-09-09
EP2099047B1 EP2099047B1 (fr) 2012-10-03

Family

ID=39699226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080152197 Not-in-force EP2099047B1 (fr) 2008-03-03 2008-03-03 Agencement de contact d'usure et disjoncteur

Country Status (1)

Country Link
EP (1) EP2099047B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2626878A1 (fr) 2012-02-10 2013-08-14 ABB Technology AG Disjoncteur haute tension à isolation gazeuse avec élément d'obstruction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019806A1 (fr) * 1979-05-25 1980-12-10 Mitsubishi Denki Kabushiki Kaisha Disjoncteur de puissance avec des moyens d'extinction des arcs
US4939322A (en) 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker
EP1306868A1 (fr) 1998-02-25 2003-05-02 Siemens Aktiengesellschaft Sectionneur de puissance haute tension à buse isolante

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019806A1 (fr) * 1979-05-25 1980-12-10 Mitsubishi Denki Kabushiki Kaisha Disjoncteur de puissance avec des moyens d'extinction des arcs
US4939322A (en) 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker
EP1306868A1 (fr) 1998-02-25 2003-05-02 Siemens Aktiengesellschaft Sectionneur de puissance haute tension à buse isolante

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2626878A1 (fr) 2012-02-10 2013-08-14 ABB Technology AG Disjoncteur haute tension à isolation gazeuse avec élément d'obstruction

Also Published As

Publication number Publication date
EP2099047B1 (fr) 2012-10-03

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