EP3226274A1 - Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters - Google Patents

Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters Download PDF

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Publication number
EP3226274A1
EP3226274A1 EP16290057.5A EP16290057A EP3226274A1 EP 3226274 A1 EP3226274 A1 EP 3226274A1 EP 16290057 A EP16290057 A EP 16290057A EP 3226274 A1 EP3226274 A1 EP 3226274A1
Authority
EP
European Patent Office
Prior art keywords
electrical connection
contact
electrical
displacement
disconnector
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.)
Withdrawn
Application number
EP16290057.5A
Other languages
English (en)
French (fr)
Inventor
Jerome Domenech
Thierry Millet
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP16290057.5A priority Critical patent/EP3226274A1/de
Publication of EP3226274A1 publication Critical patent/EP3226274A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch
    • H01H31/24—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with rectilinearly-movable bridging contact
    • 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
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/127—Load break switches comprising a separate circuit breaker movable with a sectionalising contact arm and operated by such movement
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion

Definitions

  • the present invention relates to a disconnector adapted to medium and high voltages (typically between 1kV and 550kV, or even greater than 550kV), and a disconnection method according to independent claims 1 and 13.
  • a function of the disconnector installations is to be able to connect, but above all to disconnect electrical connection elements which are generally enclosed in an enclosure filled with an insulating medium, such as sulfur hexafluoride, intended to limit the creation of arcing during the connection / disconnection of said electrical connection elements.
  • Such installations are, for example, metal insulated switchgear (GIS) type metal-wrapped substations.
  • GIS metal insulated switchgear
  • a disconnector comprises a connector or movable main contact to be inserted into or removed from a fixed main connector or contact.
  • One of these solutions is to couple said movable main contact to a movable arcing contact, the latter being intended to be inserted into or removed from a fixed arcing contact integral with said fixed contact.
  • the fixed main contact and the fixed arcing contact are connected to a first electrical apparatus, and the movable contact and moving arcing contact are connected to a second electrical apparatus.
  • the contacting of the main contacts and the arcing contacts closes the electrical circuit connecting the first and second electrical equipment.
  • the separation of said contacts opens said circuit and disconnects the first electrical equipment of the second electrical equipment.
  • the arcing contacts are used to delay the moment of appearance of an electric arc with respect to the moment of disconnection of the main contacts and to limit the duration of such an arc, in particular in order to reduce wear.
  • said moving arc contact is coupled to the movable main contact by a displacement device, typically a spring device, allowing on the one hand a disconnection of the arcing contacts taking place after disconnection of the main contacts, and secondly, a sudden acceleration of the moving arcing contact to instantly increase the spacing between the fixed arcing contact and the movable arcing contact when the main contacts (fixed and mobile) are already disconnected and progressively relative distance at constant speed during a disconnection phase, ie opening of the electrical circuit connecting the first electrical apparatus to said second electrical equipment.
  • the movable arcing contact is positioned in a chamber within said movable main contact, the latter being at a final disconnection position.
  • Another solution is to use a special material, such as carbon or copper-tungsten, for the movable main contact which in this case also has the arc contact function. Unlike the previous solution, a single moving contact is therefore present in the disconnector.
  • An object of the present invention is to provide a disconnector adapted to high voltages and a disconnection method that allows a faster interruption of the electric arc formed between the main contacts during the disconnection of the first and second electrical equipment, ie during the opening of the electrical circuit connecting said first electrical equipment to said second electrical equipment, advantageously reducing the wear of the surfaces subjected to said electric arc.
  • the first contact being electrically connected to the second contact when the electrical connection CE1, the electrical connection CE2, the electrical connection CE3 and the electrical connection CE4 are established and in particular the part A2 is at the said second position PB, the part B1 being then at said connection position and said part B2 at said position SA, the disconnector being configured to successively break the electrical connection CE1, then the electrical connections CE3 and CE4, ie in a first step the electrical connection CE1, then in a second time the electrical connections CE3 and CE4, the disconnector being configured so that the breaking of the electrical connections CE3 and CE4 generate in particular two distinct electric arcs, for example generated in series or in parallel, during a disconnection of said first contact and said second contact by removal part B1 of said part A1.
  • the breaks of the electrical connections CE3 and CE4 can be simultaneous or successive, so as to create separate electric arcs respectively in parallel (temporally simultaneous) or in series (temporally successive).
  • the electrical connection CE3 is broken before the electrical connection CE4.
  • the electrical connection CE3 is a point electrical connection, for example resulting from the contact between an electrical contact with spherical contact surface against electrical contact with flat contact surface
  • the electrical connection CE4 is a "flat" electrical connection, for example resulting from the contact between an electrical contact with a flat contact surface against another electrical contact with a flat contact surface, said planar contact surfaces being parallel.
  • the electrical connection CE3 and the electrical connection CE4 are broken simultaneously during a disconnection of said first contact and said second contact by removal of the part B1 of said part A1.
  • the figure 1 shows an embodiment of a disconnector according to the invention.
  • the latter is shown in the closed position.
  • the Figures 2 to 5 show the same disconnector at different times chronologically successive when it opens.
  • the same references apply to the same elements of the disconnector throughout its opening illustrated by the Figures 2 to 5 .
  • the disconnector according to the invention makes it possible to connect a first electrical equipment to a second electrical equipment when it is in the closed position as presented in FIG. figure 1 and disconnecting said first electrical equipment from said second electrical equipment when in the open position as presented in FIG. figure 5 , the open position referring to the interruption of the electrical circuit connecting the first electrical equipment to the second electrical equipment by means of said disconnector.
  • the disconnector, said first electrical equipment and said second electrical equipment are typically encapsulated in an interrupting chamber comprising an insulating medium such as sulfur hexafluoride, said first electrical equipment being for example located at an upstream end of said disconnector and said second electrical equipment being situated for example at a downstream end of said disconnector.
  • an insulating medium such as sulfur hexafluoride
  • Said disconnector according to the invention comprises a first contact 1 and a second contact 2, arranged for example longitudinally along an axis X, the second contact 2 being located for example downstream of said first contact 1.
  • the first contact 1 and the second contact 2 are electrically connected to each other.
  • the Figures 2 to 5 then illustrate the opening of said isolator by chronologically showing the steps leading to the complete disconnection of the first contact 1 of the second contact 2 as explained in more detail later in this document.
  • the first contact 1 can for example be connected to the first electrical equipment and the second contact 2 to the second electrical equipment.
  • the present invention proposes to disconnect the first contact 1 of said second contact 2 by moving the latter relative to the first contact 1 so as to create a succession of electric arcs as will be presented later . This succession of electric arcs improves the breaking qualities of the present disconnector.
  • the first contact 1 comprises a part A1 and a part A2 movable relative to the part A1.
  • the second contact 2 comprises a portion B1 and a portion B2 movable relative to the portion B1.
  • "Mobile” according to the present invention means in particular able to translate along said axis X.
  • the A2 part, respectively B2 is preferably movable, for example in translation along said axis X, in a cavity of said part A1 , respectively B1, for example a substantially cylindrical cavity whose longitudinal axis is preferably arranged along said axis X, said cavity being open at one of its ends, for example at a downstream end, respectively upstream, along said axis X, and closed at the other end, for example at its upstream end, respectively downstream.
  • the part A1, respectively B1, or more particularly their respective cavity serves as a support and / or guide for part A2, respectively B2.
  • each cavity may allow for example to guide in translation the movable part that accommodates.
  • the closed end of the cavity of the portion A1 comprises an insulator 12 arranged so as to prevent an electric arc between the portion A2 and the upstream bottom of said cavity.
  • said insulator 12 covers, for example, the closed base of said cylindrical shape whose open base is directed towards said second contact and the generatrices connecting said open base to said closed base extend parallel to said axis X.
  • said cavity in part A1 comprises a first part and a second part, the first part being closer to second contact 2 than the second part and being intended to receive and contact part B1, the second part accommodating at least partially said part A2 intended to contact the part B2.
  • the first part of the cavity is an upstream cylindrical part whose diameter is greater than a downstream cylindrical portion corresponding to said second portion of the cavity.
  • the part A1 comprises a main electrical contact C1, equipping for example the first part of the cavity, and a secondary electrical contact C2, equipping for example the second part of said cavity.
  • the main electrical contact C1 is intended to electrically contact the part B1 of the second contact 2 when the first contact 1 is connected to the second contact 2 in order to establish an electrical connection CE1 between the part A1 and the part B1.
  • the secondary electrical contact C2 is intended to electrically contact the part A2 in order to establish an electrical connection CE2 between the part A1 and the part B2, this electrical connection CE2 being maintained whatever the position of the moving part A2, for example, regardless of the position of said portion A2 in said cavity of part A1.
  • Part A2 is for example of cylindrical shape whose longitudinal axis is arranged longitudinally along said axis X.
  • Part A2 is movable between a first position PA, for example a down position, and a second position PB, by example an upstream position.
  • Said first position PA and said second position PB are in particular defined with respect to a frame attached to part A1 and define, for example, the position of a downstream end of said part A2 with respect to said part A1 when part A2 moves relative to in the A1 part, for example upstream downstream during the disconnection or downstream upstream at the connection of the first contact 1 with the second contact 2.
  • part A2 is configured to move in the cavity of said portion A1 of the first position PA at the second position PB, and vice versa, while continuously maintaining the electrical connection CE2, ie an electrical contact with the part A1 in particular via said secondary electrical contact C2.
  • said first position PA of said portion A2 is, along said X axis, closer to the second contact than said second position PB.
  • the displacement of said portion A2 is in particular ensured by a displacement device configured to exert a force on said part A2 opposing its displacement from the first position PA to the second position PB.
  • a displacement device comprises, for example, a mechanical device configured to store energy when the part A2 is for example pushed by said part B2 towards the second position PB during a connection of the first contact 1 with the second contact.
  • Such a displacement device is for example a spring 11, the latter being for example interposed between an upstream end of the part A2 and the bottom of the cavity of the part A1, ie the upstream end of said cavity, said spring 11 being for example in support or fixed against the insulation 12 of closed end or upstream of the cavity of the portion A1, or preferably fixed to said portion A1 and said portion A2.
  • said portion A2 is recessed inside the cavity of said portion A1 in which it is movable, in particular with respect to the downstream end of said cavity, or relative to at the downstream end of the part A1, and this, regardless of its position in said cavity, ie whether it is at said first position PA or at said second position.
  • the upstream end of the part A2 is always located in the second part of the cavity and the downstream end of said part A2 is always located in the first part of said cavity of the part A1.
  • the part B1 is preferably mobile, for example by a translational movement along said axis X, relative to the part A1 between a connection position to which the part B1 establishes an electrical connection CE1 with the part A1, in particular electrically contacting the A1 part via the main contact C1, and a disconnection position to which the electrical connection CE1 is broken.
  • a main displacement device of the disconnector allows a relative movement of the part B1 relative to the part A1 during the connection and disconnection of said parts by allowing their respective reconciliation during the connection and their respective distance when disconnection.
  • a main displacement device is a cam system enabling the part B1 of the first contact 1 to be moved away from or closer to - in the direction of rotation of said cam - in order to break or respectively establish an electrical connection between the first contact. 1 and the second contact 2.
  • Part B1 is preferably interlockable in part A1 to establish said electrical connection CE1.
  • the portion B1 is of cylindrical shape, of which an external diameter is between the diameter of the first part of the cavity of part A1 and the diameter of the second part of the cavity of part A1. In this way, the upstream end of the part B1 can fit inside the downstream end of the part A1 as illustrated in FIG. figure 1 .
  • the part B2 is mounted movably, in particular freely sliding, in particular longitudinally along said axis X, in the part B1, in particular in the cavity of the latter, between a position SA (for example a downstream position) to which it establishes an electrical connection CE3 with the part B1 by means for example of a first electrical arc contact, and a position SB (for example an upstream position) to which the electrical connection CE3 is broken, and to which it is for example isolated electrically from part B1.
  • the part B1 comprises a first stop 23 to block the part B2 at said position SA and a second stop 24 to block the part B2 at said position SB, so that a displacement of the part B2 is limited to positions between the first stop 23 and the second stop 24.
  • the second stop 24 comprises an insulator for avoiding an electrical contact between the part B2 and said second stop when said portion B2 abuts against said second stop 24.
  • Part B2 according to the invention preferably comprises a convex or substantially spherical surface, preferably symmetrical with respect to the X axis, and intended to contact the part B1 at said SA position in a substantially punctual manner in order to establish the electrical connection CE3 , the latter being therefore also substantially punctual and likely to the breaking of the contact CE1, a repulsive necking force directed along said axis X and able to move the part B2 of the position SA at the SB position.
  • Part B2 and part A2 both preferably comprise a flat surface, parallel to each other and intended to come into contact with each other in order to form the electrical connection CE4.
  • Part B2 according to the invention is for example in the form of a cap comprising a head and a trunk, preferably both cylindrical, said cap being disposed longitudinally along said axis X.
  • said head is cylindrical in shape and has a diameter greater than diameter of said trunk and is disposed downstream of said trunk so as to abut against said first stop 23 or second stop 24 during a displacement of said portion B2 in the part B1, for example in the cavity of the part B1.
  • the part B2 to at least one part forming a protrusion out of the part B1, for example out of the cavity of the part B1, extending towards the first contact 1, for example beyond the upstream end of the part B1, and ending upstream for example by said flat surface.
  • said protruding part is the trunk of said plug, for example the upstream end of said trunk whose longitudinal axis is disposed along the axis X.
  • Said projecting portion is in particular configured to electrically contact the downstream end of the part A2 when the first contact 1 and the second contact 2 are connected to each other.
  • the head of said plug comprises at its downstream end intended to contact the portion B1 said convex or substantially spherical surface so that the CE3 connection is punctual and likely to cause a necking repulsion between the part B1 and the B2 part during the electrical disconnection of the first contact of said second contact.
  • said part B2 is thus particularly configured to be in electrical contact with the part B1 when it abuts against said first stop 23 and to be electrically disconnected from said. part B1 when it abuts against said second stop 24, or in particular as soon as a contact with said first stop 23 is broken, said first stop 23 being able to serve as an electrical contact to establish or break the electrical connection CE3.
  • said part B1 comprises an insulator 13 electrically insulating the part B2 of the part B1 as soon as the electrical connection CE3 is broken and can also advantageously serve as a guide in translation for a displacement of said part B2.
  • Said insulator 13 is for example fixed on the longitudinal walls of the cavity of the part 1, between the closed downstream end and the open upstream end, or in particular between the first abutment 23 and the second abutment 24.
  • said insulator 13 covers the entire cylindrical surface of said cavity, in particular between the first stop 23 and the second stopper 24.
  • said insulator 13 is configured to prevent any electrical contact of the lateral sides of the part B2 with the part B1, while allowing for example a support of said lateral sides against the part B1 by means of said insulator 13.
  • the figure 1 shows the disconnector according to the invention in the closed position.
  • the current I can pass from the first contact 1 to the second contact 2 by following two paths, respectively a main path 8 and a secondary path 9.
  • the main path 8 conducts the current through the part B1 directly to the part A1, for example via the main electrical contact C1 of the part A1.
  • the secondary path 9 conducts the current through the part B1, then the part B2, then the part A2, and finally to the part A1 via including the secondary electrical contact C2 of the part A1.
  • the first contact 1 is thus electrically connected to the second contact 2 when an electrical connection CE1 between the part A1 and the part B1, an electrical connection CE2 between the part A1 and the part A2, an electrical connection CE3 between the part B1 and the Part B2 and an electrical connection CE4 between part B2 and part A2 are established.
  • the disconnection method according to the invention then comprises chronologically and successively the following steps.
  • the main displacement device When opening the disconnector according to the invention, the main displacement device will move the A1 part relative to the B1 part by moving the latter from a connection position, for example upstream, towards a position disconnection, located for example downstream to which the first contact 1 and the second contact 2 are disconnected from one another. Note that during the connection, the reverse movement is then performed by means of said main displacement device.
  • Moving part B1 of its connection position towards its disconnection position will generate a succession electrical connection breaks configured to create a succession of electric arcs.
  • said displacement in the direction of said disconnection position first breaks the electrical connection CE1 as illustrated in FIG. figure 2 .
  • the breaking of the electrical connection CE1 also marks the cutting of the main path 8, the current I can not flow directly from the part B1 to the A1 part. Therefore, only the secondary path 9 allows the conduction of the current of the part B1 to the A1 part, the connections CE2, CE3 and CE4 being maintained during said breakage of the electrical connection CE1.
  • the displacement device of said portion A2 is able to compensate for the displacement of the portion B1 towards the disconnection position by moving the portion A2 towards the first position PA so as to temporarily maintain the electrical connection CE3 and the electrical connection CE4, said displacement being for example a simultaneous movement, of the same magnitude and the same direction of the part A2 so that the part A2 and the B2 part are kept in contact and the B2 part be maintained at its SA position.
  • the displacement device is in particular capable of performing this compensation of the displacement of the part B1 only until the part A2 reaches its first position PA.
  • the displacement device ceases to compensate for the displacement of the part B1 in the direction of the disconnection position. This will cause the breaking of the electrical connection CE3 and the creation of a first electric arc 21 between the part B1 and the part B2. Indeed, although the displacement device has stopped compensating for the distance of the part B1 relative to the A1 part, the part B1 has not yet reached its disconnected position and therefore this removal continues. A field of repulsive electric forces is then created between the part B1 and the B2 part, pushing the B2 part in a direction opposite to the direction of movement of the B1 part to the disconnection position.
  • the part B1 is configured to limit the displacement of the part B2 between the position SA and the position SB, in particular by means of the stops 23 and 24. Therefore, once the part B2 arrived in position SB, the compensation of the displacement of the part B1 to the disconnection position by moving part B2 stops. However, since the part B1 continues to move towards the disconnection position, the part B1 is driven by this displacement of the part B1 causing a distance from the part B2 of the part A2 and creating a break of the connection CE4. This breaking of the connection CE4 generates a second electric arc 22 in series with the electric arc 21 as illustrated in FIG. figure 4 .
  • the figure 5 finally illustrates the disconnector in the open position, the part B1 having finally arrived at its position B2 being in the SB position and the A2 part in its first position PA.
  • the closing of said disconnector then takes place exactly in the opposite direction, ie the bringing together of the part B1 with the part A1 will put the B2 part in contact with the A2 part, then push the B2 part to the SA position, then push the B2 part at its second position SB until the electrical connection CE1 between the part A1 and the part B1 is established.
  • electric arcs are generated in series (and could be generated simultaneously by modifying, for example, the geometry of the surfaces intended to come into contact in order to form the electrical connections CE3 and CE4 for the parts B2, B1 and A2), during the disconnection of the first contact of said second contact thus allowing a faster interruption of the electrical conduction of said disconnector, and also to reduce the wear of the surfaces subjected to said arcs.

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EP16290057.5A 2016-03-31 2016-03-31 Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters Withdrawn EP3226274A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16290057.5A EP3226274A1 (de) 2016-03-31 2016-03-31 Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16290057.5A EP3226274A1 (de) 2016-03-31 2016-03-31 Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters

Publications (1)

Publication Number Publication Date
EP3226274A1 true EP3226274A1 (de) 2017-10-04

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EP16290057.5A Withdrawn EP3226274A1 (de) 2016-03-31 2016-03-31 Trennschalter mit bogenteilung, der an mittel- und hochspannungen angepasst ist, und abschaltmethode mithilfe dieses trennschalters

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108389750A (zh) * 2018-01-17 2018-08-10 河南平高电气股份有限公司 一种隔离开关及其静触头装配

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512366A2 (de) * 1991-05-08 1992-11-11 Hitachi, Ltd. Gasisolierter Trennschalter und Schaltvorrichtung
EP2221844A1 (de) * 2009-02-24 2010-08-25 ABB Technology AG Schaltvorrichtung
US20130008873A1 (en) * 2011-07-04 2013-01-10 Abb Technology Ag Electrical high-voltage on-load disconnector and method for opening the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0512366A2 (de) * 1991-05-08 1992-11-11 Hitachi, Ltd. Gasisolierter Trennschalter und Schaltvorrichtung
EP2221844A1 (de) * 2009-02-24 2010-08-25 ABB Technology AG Schaltvorrichtung
US20130008873A1 (en) * 2011-07-04 2013-01-10 Abb Technology Ag Electrical high-voltage on-load disconnector and method for opening the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108389750A (zh) * 2018-01-17 2018-08-10 河南平高电气股份有限公司 一种隔离开关及其静触头装配
CN108389750B (zh) * 2018-01-17 2020-09-11 河南平高电气股份有限公司 一种隔离开关及其静触头装配

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