EP3240001A1 - Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen - Google Patents

Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen Download PDF

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Publication number
EP3240001A1
EP3240001A1 EP16167338.9A EP16167338A EP3240001A1 EP 3240001 A1 EP3240001 A1 EP 3240001A1 EP 16167338 A EP16167338 A EP 16167338A EP 3240001 A1 EP3240001 A1 EP 3240001A1
Authority
EP
European Patent Office
Prior art keywords
contact element
contact
cylindrical shaped
element arrangement
shaped contact
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Withdrawn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
EP16167338.9A
Other languages
English (en)
French (fr)
Inventor
Torsten Wirz
Robby Zitzmann
Dalibor Kopp
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 Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP16167338.9A priority Critical patent/EP3240001A1/de
Publication of EP3240001A1 publication Critical patent/EP3240001A1/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Withdrawn legal-status Critical Current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
    • H01H31/26—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts

Definitions

  • the invention relates to a three-position-switch in medium or high voltage gas insulated switchgears, which provides a disconnector switch and an earthing switch, which further consist of one movable conductor and three contacts, which are busbar contact, center contact and earth contact, according to the preamble of claim 1.
  • Aforesaid three-position-switches are provided with a movable conductor, which allows to connect a first and a second contact, in the disconnectors closed position, or a second and a third contact, in earthing switch closed position. If the movable conductor is in centre position, all three contacts are insulated from each other, that means, disconnector open and earthing position open. For that, different contact systems are state of the art. The most common ones are knife type contact system and the gliding type contact system.
  • a knife type contact system is shown in the EP0684673 B1 .
  • the movable conductor is represented by a contact knife, which is conductively connected and mounted on a bearing block, which represents the second contact. By rotative movement, the contact knife can be brought into the three positions which are connection to first contact, connection to third contact, or disconnection position.
  • a contact force has to be applied in all contact points.
  • the pivot point of the knife spring washer can be used to contact the knife to the block. If a double knife arrangement is used, the contact to the first and the third contact can be provided by a tension spring between the knives, so the contacts can be clamped between them. So, the knife type connection provides two transition resistances in the current pass:
  • a gliding type contact system is shown in the US 2009015881 A1 .
  • the movable conductor is a cylindrical bolt or tube. This is mounted in a tubular second contact piece and can be brought in contact with the first or third contact by a translational movement.
  • the translational movement can be applied to the conductor by a spindle, if the movable conductor is twist protected with respect to the second contact.
  • the contact force is applied by circular spiral contacts, which are mounted inside the cylindrical contact pieces.
  • the gliding type connection provides four transition resistances in the current pass: contact to spiral contact, spiral contact to movable contact, movable contact to spiral contact, and spiral contact to contact.
  • Target is, to generate a compact and efficient medium voltage switchgear, so costs and needed space of the used components is crucial. Keeping the ohmic losses at a minimum is also a target, because certain temperature limits must not be exceeded.
  • An efficient manufactured knife contact has not a homogeneous distributed electrical field. To achieve a sufficient insulation level for higher voltage levels, it has either a huge demand of space or needs additional complex and costly field grading measures. Therefore, as a rule of thumb, such a contact system is a good solution for lower voltage ratings.
  • the cylindrical shaped gliding contact arrangement provides a more homogeneous electrical field distribution, so that a sufficient insulation level can be achieved in most cases easier for higher voltage levels than with a knife type one.
  • the movable contact for example a cylindrical bolt or a tube, has only an average deheating capability, because the surface is small and smooth and radiation and convection is not actively supported by that.
  • the object of the invention is, to create a contact system with possibly low ohmic restistance, which is furthermore compact.
  • the invention is, that spring means for providing the radially expanding contact forces, are located inside the cylindrical shape, represented by the contact elements arrangement. This results in low ohmic resistance as well as in a very compact arrangement.
  • a further advantageous embodiment is, that the support structure is dimensioned relatively to the tube shaped contact side as such, that it allows a radial movement of the contact elements between a minimal diameter and a maximal diameter of the cylindrical shaped contact element.
  • the contact elements have a sector shaped like cross section in axial view.
  • the contact force generated by the spring means, is effective between the support structure and the contact elements.
  • the spring means are springs, which are placed between the support structure and the contact elements.
  • the spring means are at least one ring shaped helical spring, which is, or are fixed on the support structure in a corresponding, at least one tangential groove.
  • the spring means are per contact element at least one helical spring which is forced axial, supporting each contact element individually.
  • the spring means are per contact element at least one flat spring, supporting each contact element individually.
  • the at least one flat spring is wave formed.
  • the spring means are at least one spring, which force is orientated in axial direction and is redirected in radial direction and applied to the contact elements.
  • an advantageous embodiment is, that the redirection of the spring force is reached by a chock arrangement, which skew surfaces are part of the support structure and part of the contact element.
  • a plug connection for medium or high voltage application, for connection of two conductors having two cylindrical shaped female plug sockets and one cylindrical shaped contact element, wherehin the cylindrical shaped contact element is a cylindrical shaped contact element arrangement, according to one of the aforesaid claims 1 to 12, concerning to contact element, and to claims 13 to 17 for the use of such a contact element in a plug connection.
  • an electrical switch for medium or high voltage use having at least two static contacts which can be connected by a movable cylindrical shaped contact element, wherein the movable cylindrical shaped contact element is a cylindrical shaped contact element arrangement according to claim 1 to 12, concerning to contact element, and to claims 13 to 17 for the use of such a contact element in a plug connection.
  • cylindrical shaped contact element arrangement is movable by an axial force generated by a mechanical element, which effects the support structure of the contact element arrangement.
  • the mechanical element exceeds at least partly, at least one of the at least two static contacts.
  • the mechanical element can be a push rod, gear rack, linkage or a spindle nut combination.
  • a design of a round conductor piece is proposed, which is able to generate contact forces in radial direction. This is reached by using multiple, independent, parallel contact elements, forming a segmented movable contact. Therefore this conductor piece (in the following: cylindrical shaped contact element arrangement) is able to connect two tube shaped contacts by insertion of the cylindrical shaped contact element arrangement into both contacts.
  • the effective contact force allows a reliable electrical connection in radial direction from the 1 st tube shaped contact to the cylindrical shaped contact element arrangement and vice versa to the 2 nd tube shaped contact.
  • Figure 1 shows a sectional view of the schematic construction of the cylindrical shaped contact element arrangement 10.
  • a contact element 20 is supported by spring means 30, which push the contact element in radial direction.
  • the springs are supported by a support structure 40.
  • the movement of the contact element is limited by a locking or hocking geometry 50 which defines the maximal outer diameter of the cylindrical shaped contact element arrangement d max , which is reached, when it is not connected to any contact (unforced contact element arrangement).
  • Figure 2 shows the cylindrical contact element arrangement in forced status, means it is connected to cylindrical shaped contacts 60, 70. Minimal outer diameter d min is reached.
  • FIG 3 a sectional view A (ref fig1 ) is shown. Contact elements are individually supported by spring means and guided in radial direction by the support structure.
  • Figure 4 shows the generation of the radial spring force by a wave flat spring 32.
  • Figure 5 shows the generation of the radial spring force by ring shaped helical spring 33, which are fixed on the support structure in corresponding tangential grooves.
  • Figure 6 shows the generation of the contact force by spring washer arrangement 34 which force is redirected from axial direction to radial direction. This can be achieved when the support structure consists of two pieces 40.1, 40.2 which are movable relative against each other and a spring washer arrangement 34.1 unforced, 34.2 forces is effective between these. The redirection is achieved by a chock arrangement 80 which skew surfaces are part of the support structure and part of the contact element.
  • Figure 7 shows exemplarily a plug connection which uses the cylindrical shaped contact element arrangement 10 as coupling conductor.
  • the static contact 60, 70 are electrically connected by the cylindrical shaped contact element arrangement 10. Therefore the contact element arrangement contacts the static contacts on the inner surface of the tube shaped contact geometry.
  • Figure 8 shows the principle structure of a three position switch.
  • the movable contact piece is a cylindrical shaped contact element arrangement 10 which can be moved by a drive spindle. Therefore the support structure 40 provides an inner screw and it is twist protected against the static contacts (not shown).
  • a gliding contact system which improves the following aspects:
  • the surface area of the segmented contact is increased with respect to the movable contact surface area, which increases the deheating performance, by radiation and convection.
  • a support structure is needed for holding the contact elements and to allow a synchronous movement of the segmented movable contact from one switching position into another.
  • Contact force is applied to the contact elements by springs, which are located inside the segmented movable contact shape, like already said above. Each spring, is generating the contact force, and is not part of the current path anymore, so that the total resistance is reduced by two transition resistances and the resistance of the spiral contact.
  • the amount of spring elements is reduced, because it is moved from the static contacts to the movable conductor.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP16167338.9A 2016-04-27 2016-04-27 Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen Withdrawn EP3240001A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16167338.9A EP3240001A1 (de) 2016-04-27 2016-04-27 Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16167338.9A EP3240001A1 (de) 2016-04-27 2016-04-27 Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen

Publications (1)

Publication Number Publication Date
EP3240001A1 true EP3240001A1 (de) 2017-11-01

Family

ID=55854700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16167338.9A Withdrawn EP3240001A1 (de) 2016-04-27 2016-04-27 Zylindrisch geformte kontaktstückanordnung für einen dreipositionsschalter in mittel- oder hochspannungsgasisolierten schaltanlagen

Country Status (1)

Country Link
EP (1) EP3240001A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3582347A1 (de) * 2018-06-13 2019-12-18 ABB Schweiz AG Elektrische verbindungsanordnung in einer elektrischen schaltanlage
US12009163B2 (en) 2019-06-21 2024-06-11 Abb Schweiz Ag Three-position disconnector switch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009043A (en) * 1959-08-27 1961-11-14 Allis Chalmers Mfg Co Disconnecting contact
EP0684673B1 (de) 1994-04-18 1998-05-13 ABBPATENT GmbH Schaltfeld mit einem innerhalb eines Schaltschrankes angeordneten dreipoligen Leistungsschalters
WO2005062325A1 (ja) * 2003-12-19 2005-07-07 Mitsubishi Denki Kabushiki Kaisha 断路器
DE102006056656A1 (de) * 2006-11-29 2008-06-12 Areva Sachsenwerk Gmbh Schaltermodul für eine elektrische Schaltanlage
US20090015881A1 (en) 2007-07-10 2009-01-15 Canon Kabushiki Kaisha Image forming apparatus and method of controlling same
EP2141719A1 (de) * 2008-07-02 2010-01-06 Eaton Electric B.V. Fester Trennschalter
US20100304622A1 (en) * 2007-12-05 2010-12-02 Mitsubishi Electric Corporation Contact device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009043A (en) * 1959-08-27 1961-11-14 Allis Chalmers Mfg Co Disconnecting contact
EP0684673B1 (de) 1994-04-18 1998-05-13 ABBPATENT GmbH Schaltfeld mit einem innerhalb eines Schaltschrankes angeordneten dreipoligen Leistungsschalters
WO2005062325A1 (ja) * 2003-12-19 2005-07-07 Mitsubishi Denki Kabushiki Kaisha 断路器
DE102006056656A1 (de) * 2006-11-29 2008-06-12 Areva Sachsenwerk Gmbh Schaltermodul für eine elektrische Schaltanlage
US20090015881A1 (en) 2007-07-10 2009-01-15 Canon Kabushiki Kaisha Image forming apparatus and method of controlling same
US20100304622A1 (en) * 2007-12-05 2010-12-02 Mitsubishi Electric Corporation Contact device
EP2141719A1 (de) * 2008-07-02 2010-01-06 Eaton Electric B.V. Fester Trennschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3582347A1 (de) * 2018-06-13 2019-12-18 ABB Schweiz AG Elektrische verbindungsanordnung in einer elektrischen schaltanlage
CN110600337A (zh) * 2018-06-13 2019-12-20 Abb瑞士股份有限公司 电气开关设备中的电连接组件
US12009163B2 (en) 2019-06-21 2024-06-11 Abb Schweiz Ag Three-position disconnector switch

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