EP2959494A1 - Elektrische anwendung mit einer beweglichen elektrode - Google Patents

Elektrische anwendung mit einer beweglichen elektrode

Info

Publication number
EP2959494A1
EP2959494A1 EP14705158.5A EP14705158A EP2959494A1 EP 2959494 A1 EP2959494 A1 EP 2959494A1 EP 14705158 A EP14705158 A EP 14705158A EP 2959494 A1 EP2959494 A1 EP 2959494A1
Authority
EP
European Patent Office
Prior art keywords
contact
downstream
upstream
electrode
face
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
EP14705158.5A
Other languages
English (en)
French (fr)
Other versions
EP2959494B1 (de
Inventor
Paul Vinson
Liului HUANG
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Technology AG filed Critical Alstom Technology AG
Publication of EP2959494A1 publication Critical patent/EP2959494A1/de
Application granted granted Critical
Publication of EP2959494B1 publication Critical patent/EP2959494B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H33/045—Means for extinguishing or preventing arc between current-carrying parts for arcs formed during closing
    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H01H33/245—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring using movable field electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact

Definitions

  • the invention provides an electrical apparatus for a high voltage electrical power transmission line, such as an earthing switch, a disconnector or a circuit breaker, including means for delaying the moment of appearance of an arc. during a closing phase of the electrical equipment and to limit the duration of such an arc during a closing phase or opening of the electrical equipment.
  • a high voltage electrical power transmission line such as an earthing switch, a disconnector or a circuit breaker
  • An electrical apparatus for a high voltage electrical power transmission line such as for example a disconnector for a high voltage transmission line is a safety device which aims to establish electrical isolation between live parts.
  • the electrical equipment comprises an upstream contact and a downstream contact, which are able to be brought into contact or to be separated, depending on whether or not an electrical connection is to be established between the two parts under tension.
  • the apparatus also comprises an electrically conductive closed enclosure, in which the contacts are received, and this enclosure is filled with an electrically insulating gas such as, for example, sulfur hexafluoride SF6 or a gaseous mixture under pressure, to limit the formation of the electric arc.
  • an electrically insulating gas such as, for example, sulfur hexafluoride SF6 or a gaseous mixture under pressure
  • arcs are formed between the two contacts. These arcs between contacts may have radial branches which, under certain conditions, may propagate radially and reach the surrounding conductive enclosure.
  • a solution that makes it possible in part to limit the appearance of the radial branches of the electric arcs consists in increasing the speed of movement of the moving contact.
  • this involves designing large training means dimensions, thus increasing the cost of fitting.
  • the rapid opening of a disconnector on a portion of vacuum bar sets can induce a so-called "trapped" electrical charge which is greater than in the case of a slow maneuver. This increases the likelihood of an arc developing towards the tank at the next closing maneuver.
  • the object of the invention is to propose electrical equipment designed to limit the risk of occurrence of radial branches of electric arcs, to optimize the reliability of the equipment during a step of opening or closing the apparatus by improving the capabilities of the device according to the three points mentioned above.
  • the invention proposes a high voltage apparatus having a longitudinal main axis A, comprising an upstream contact which is arranged at an upstream end of the apparatus and a downstream contact which is arranged at a downstream end of the apparatus, which is movable axially between a downstream opening position of the equipment in which the downstream contact is located axially downstream and away from the upstream contact and an upstream position in which the downstream contact is in contact with the upstream contact,
  • upstream electrode which is integral with the upstream contact and which extends radially around the upstream contact
  • a movable downstream electrode extending radially around the downstream contact, which is mounted axially movable in a manner synchronized with the movement of the downstream contact, between a downstream position and an intermediate position in which the downstream electrode is located downstream and away from the upstream electrode, the downstream electrode being electrically connected to the downstream contact
  • downstream contact is movable axially upstream from said upstream position in which the downstream contact comes into contact with the upstream contact, and a closed position of the apparatus in which the downstream contact is in contact with the upstream contact and with the upstream electrode.
  • the movable downstream contact is electrically connected to the upstream contact before it is connected to the upstream electrode. Also, the movable downstream contact makes it possible to make the electrical connection of the downstream electrode with the upstream electrode indirectly via the upstream contact, then directly, during a closing phase of the apparatus.
  • the downstream contact has an outer cylindrical face which is in contact with an inner cylindrical face complementary to the upstream electrode when the downstream contact is in contact with the upstream contact and with the upstream electrode.
  • the downstream electrode has an upstream end face which is located at a predefined longitudinal dimension with respect to an upstream end face of the downstream contact when the downstream contact and the downstream electrode are located axially between the downstream position. and the intermediate position.
  • the downstream contact is located axially projecting upstream with respect to the upstream end face of the downstream electrode when the longitudinal position of the downstream contact is located upstream of said intermediate position.
  • downstream end face of the upstream electrode is located at the same axial dimension as a downstream end face of the upstream contact when the upstream contact is in its downstream position.
  • the upstream contact is movably mounted in the equipment and is able to move in solidarity with the downstream contact between a downstream position in which the contact is established between the upstream contact and the downstream contact and an upstream position corresponding to the closed position of the apparatus.
  • the apparatus comprises means for driving the upstream contact in displacement axially downstream.
  • the upstream contact is driven by the downstream contact moving from its downstream position to its upstream position.
  • the upstream contact consists of a tubular element and the downstream contact comprises an axial rod whose free end is adapted to be received without play inside said tubular element.
  • Figures 1 to 5 are similar axial sections showing different successive positions of the upstream and downstream contacts, when closing the apparatus according to the invention
  • FIG. 6 is a view similar to that of Figure 1, showing an alternative embodiment of the contacts of the apparatus.
  • an electrical apparatus 10 for a high voltage electric power transmission line which here consists of a disconnector or a circuit breaker.
  • the apparatus 10 has the function of electrically connecting a live part of an electrical network, which is at a certain electrical potential, to another part of the electrical network, which may be at another electric potential, depending on the conditions of use of the equipment 10.
  • a series of arcs is formed inside the apparatus 10. These arcs can damage the internal components of the apparatus, it is preferable to limit them, or the less to control them.
  • the apparatus 10 consists of a generally elongate element of main axis A which is here oriented longitudinally.
  • the apparatus 10 comprises an upstream contact 12 which is arranged at an upstream axial end of the apparatus 10 with respect to the main axis A, here the right axial end in the figures, and which is connected to a part of the network. electric power transmission
  • the apparatus 10 also comprises a downstream contact 22 which is arranged at the downstream axial end of the apparatus 10, here the left end, and which is here connected to another part of the electrical power transmission network.
  • the downstream contact 22 is positioned axially vis-à-vis the upstream contact 12.
  • the upstream contact 12 and the downstream contact 22 each consist of an axially extending axial rod and the upstream end face 22a of the downstream contact 22 is adapted to come into operation. permanent contact with the downstream end face 12a vis-à-vis the fixed contact 12 when the apparatus is in a closed position.
  • rod used may designate both a solid rod and a hollow or tubular rod.
  • the upstream contact 12 has a tubular shape and the downstream contact 22 has a radially internal rod 14 and a tubular portion 16 surrounding the internal rod 14.
  • the upstream end 14a of the rod 14 is defined to be received without play inside the upstream contact 12, when the upstream 12 and downstream contacts 22 are connected to each other, as will be seen more in detail later.
  • the apparatus 10 also comprises a fixed body 20 through which the downstream contact 22 is guided in axial translation.
  • the fixed body 20 is made of an electrically conductive material and is connected to the earth's electrical potential.
  • An insulating material support 18 makes it possible to electrically isolate the fixed body from the downstream contact 22.
  • downstream contact 22 moves axially upstream towards the upstream contact 12, from a first downstream opening position of the apparatus 10 shown in FIGS. , in which the downstream contact 22 is situated at a distance from the upstream contact 12.
  • electric arcs can be formed between the two contacts 12, 22 and secondary electric arcs. may be formed between the contacts 12, 22 and the body 20 from these arcs.
  • the apparatus 10 comprises a downstream electrode 30 which is mounted at the downstream end of the apparatus 10 and an upstream electrode 32 which is mounted at the upstream end of the apparatus. the apparatus 10.
  • the downstream electrode 30 consists of an element of revolution which surrounds the downstream contact 22.
  • the downstream electrode 30 has a radially extending main upstream face 30a which faces the upstream contact 12 and the upstream electrode 32.
  • the upstream electrode 32 is of a shape similar to the shape of the downstream electrode 30. It consists of a revolution element which surrounds the upstream contact 12 and has a downstream face 32a extending mainly radially facing the face. upstream 30a of the downstream electrode 30.
  • the downstream electrode 30 is mounted axially movable relative to the body 20 between a downstream position shown in FIG. 1, in which the upstream face 30a of the downstream electrode 30 is flush with the upstream face 22a of the movable contact 22 and an upstream position. represented in FIGS. 2 and following.
  • the downstream electrode 30 moves axially synchronously with the axial displacement of the downstream contact 22 from the downstream position to an intermediate position shown in Figure 2 in which the downstream electrode 30 is in its extreme upstream position.
  • the downstream contact 22 moves axially upstream beyond the contact position shown in FIG. 4, towards a closed position of the apparatus 10 shown in FIG.
  • downstream contact 22 When the downstream contact 22 is in the closed position of the apparatus 10, it is simultaneously in contact with the upstream contact 12 and the upstream electrode 32.
  • the two electrodes are thus electrically connected to one another via the downstream contact 12.
  • downstream contact 22 is permanently in contact with the upstream contact 12, to avoid any occurrence of an electric arc in
  • the upstream contact 12 is able to move upstream, simultaneously with the downstream contact 22.
  • the upstream contact 12 is mounted to move relative to the fixed body 20 between a downstream position shown in FIGS. 1 to 4, and an upstream position shown in FIG.
  • the drive of the upstream contact 12 from its downstream position to its upstream position is performed via the downstream contact 22, so that the displacement of the two contacts 12, 22 is simultaneous.
  • the drive of the upstream contact 12 from its upstream position to its downstream position is carried out by example by elastic means (not shown) such as a compression spring for example.
  • the elastic means exert on the upstream contact 12 a continuous action of driving the upstream contact 12 to its downstream position.
  • the elastic means make it possible to maintain the upstream contact 12 and the downstream contact 22 in contact with each other during their upstream or downstream displacements between the contact position and the closed position of the Apparatus 10.
  • the upstream contact 12 remains stationary when the downstream contact 22 moves between the contact position and the closed position of the apparatus 10.
  • the electrical connection between the upstream contact 12 and the downstream contact 22 is made via the rod 14 whose free end 14a is received without play in the upstream contact 12. Electrical contact is maintained between the two electrical contacts, the inner shape of the upstream contact 12 is cylindrical, to allow axial sliding upstream of the free end 14a of the rod 14, while maintaining an electrical contact.
  • the electrical connection between the downstream contact 22 and the upstream electrode 32 is formed by the contact between an outer cylindrical face of the downstream contact 22 and an inner cylindrical face complementary to the upstream electrode 32.
  • this outer cylindrical face of the downstream contact 22 is its outer face.
  • this outer cylindrical face of the downstream contact 22 is the outer face of the tubular portion 16 surrounding the inner rod 14.
  • downstream contact 22 comes into contact with the upstream contact 12, as shown in FIG. 4, and then, as previously described, the downstream contact 22 move towards the upstream position of closure of the apparatus 10, simultaneously with the contact upstream 12 according to the first embodiment of the invention shown in Figure 5, or in sliding relative to the upstream contact according to the embodiment shown in Figure 6.
  • the downstream contact 22 then comes into contact with the upstream electrode 32, thus closing the apparatus 10.
  • the apparatus 10 is opened in a reverse movement of the upstream contact 12, the downstream contact 22 and the downstream electrode 30, that is to say by successively passing from the state shown in FIG. 5 in the state shown in Figure 1.
  • the upstream contact 12 moves downstream to the contact position shown in FIG.
  • downstream contact 22 and the downstream electrode 30 move simultaneously downstream to the open position of the apparatus 10 shown in FIG. 1.
  • their upstream end faces 22a and 30a are always at the same axial dimension with respect to each other, limiting the formation of radial arcs.

Landscapes

  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
EP14705158.5A 2013-02-20 2014-02-18 Schaltvorrichtung mit einer bewegbaren elektrode Active EP2959494B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1351440A FR3002364B1 (fr) 2013-02-20 2013-02-20 Appareillage electrique comportant une electrode mobile
PCT/EP2014/053077 WO2014128103A1 (fr) 2013-02-20 2014-02-18 Appareillage electrique comportant une electrode mobile

Publications (2)

Publication Number Publication Date
EP2959494A1 true EP2959494A1 (de) 2015-12-30
EP2959494B1 EP2959494B1 (de) 2016-11-16

Family

ID=48692597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14705158.5A Active EP2959494B1 (de) 2013-02-20 2014-02-18 Schaltvorrichtung mit einer bewegbaren elektrode

Country Status (3)

Country Link
EP (1) EP2959494B1 (de)
FR (1) FR3002364B1 (de)
WO (1) WO2014128103A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2483121A1 (fr) * 1980-05-23 1981-11-27 Alsthom Atlantique Sectionneur de poste blinde a haute tension
CH658936A5 (de) * 1982-08-26 1986-12-15 Bbc Brown Boveri & Cie Metallgekapseltes hochspannungsschaltgeraet.
FR2553926B1 (fr) * 1983-10-24 1986-08-01 Merlin Gerin Disjoncteur haute tension a resistances de fermeture
JPS62170118A (ja) * 1986-01-23 1987-07-27 株式会社東芝 ガス絶縁断路器
JPH01307122A (ja) * 1988-06-06 1989-12-12 Toshiba Corp 断路器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014128103A1 *

Also Published As

Publication number Publication date
EP2959494B1 (de) 2016-11-16
FR3002364B1 (fr) 2016-08-19
FR3002364A1 (fr) 2014-08-22
WO2014128103A1 (fr) 2014-08-28

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