EP2249359B1 - Mittelspannungs-Hauptschalterkontaktanordnung - Google Patents

Mittelspannungs-Hauptschalterkontaktanordnung Download PDF

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Publication number
EP2249359B1
EP2249359B1 EP09159292.3A EP09159292A EP2249359B1 EP 2249359 B1 EP2249359 B1 EP 2249359B1 EP 09159292 A EP09159292 A EP 09159292A EP 2249359 B1 EP2249359 B1 EP 2249359B1
Authority
EP
European Patent Office
Prior art keywords
segment
contact
segments
line switch
medium voltage
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.)
Active
Application number
EP09159292.3A
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English (en)
French (fr)
Other versions
EP2249359A1 (de
Inventor
Francesco Belloni
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 EP09159292.3A priority Critical patent/EP2249359B1/de
Priority to ES09159292.3T priority patent/ES2687407T3/es
Priority to CN2009102063466A priority patent/CN101882508A/zh
Priority to CN2009201787540U priority patent/CN201608057U/zh
Priority to RU2010117358/07U priority patent/RU99898U1/ru
Publication of EP2249359A1 publication Critical patent/EP2249359A1/de
Application granted granted Critical
Publication of EP2249359B1 publication Critical patent/EP2249359B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H1/42—Knife-and-clip contacts
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • the present invention relates to a contact arrangement, in particular to a contact arrangement of a Medium Voltage line switch, having improved resistance to arcing phenomena.
  • Medium Voltage is referred to applications in the range of between 1 and 52 kV.
  • Medium Voltage line switch are well known in the art and usually comprises, for each phase a contact assembly having a fixed contact and a corresponding movable contact.
  • An arc chamber provided with an arcing electrode, is also present in order to control the arcing phenomena and minimize the arcing effects occurring during opening/closing operations of the line switch.
  • Various solutions have been proposed in order to minimize the arcing effects on the contacts, said solutions being directed to improve the design of the main contacts and/or of the arcing chamber and/or to increase the speed of opening/closing operations.
  • Patent applications DE3820489A1 and EP1026710A2 disclose known examples of switch contact arrangements.
  • the present invention is aimed at providing a Medium Voltage line switch contact arrangement in which the prearcing time is reduced.
  • a further object of the present invention is to providing provide a Medium Voltage line switch contact arrangement in which the arc burns far away from the main contacts, thereby preventing or considerably reducing contact erosion.
  • Still another object of the present invention is to provide a Medium Voltage line switch contact arrangement with reduced manufacturing and installation costs.
  • the present invention relates to a Medium Voltage line switch contact arrangement according to the following claim 1 and the related claims.
  • the width L of the flat body is measured along the perpendicular line drawn from the connection point between said first and second segment to the fourth segment.
  • a Medium Voltage line switch comprising a contact arrangement as described above is also part of the present invention.
  • a Medium Voltage line switch contact arrangement generally comprises a fixed contact 2 and a movable contact assembly 3 which can be operatively connected to and disconnected from said fixed contact 2.
  • the movable contact assembly 3 normally comprises a first 31 and a second 32 substantially flat blades which are arranged parallel to each other and at a distance from each other.
  • the flat blades 31, 32 are pivotally mounted on a support (not shown) in correspondence of a pivot point 35. By rotation around the pivot point 35, the flat blades 31 and 32 can be connected to and disconnected from the fixed contact 2.
  • the fixed contact 2 comprises contact element having a substantially flat body 20 having a first 21 and a second 22 contact surfaces which, in the closed position of the switch, interact with the inner surfaces of the flat blades 31 and 32 to close the circuit.
  • the substantially flat body 20 is delimited by a base 23, which is electrically and mechanically connected to a contact holder 24, and by a first 25, a second 26, a third 27 and a fourth 28 segments so as to have a particular shape.
  • the substantially flat body 20 is positioned so as to have the first 21 and the second 22 contact surface substantially parallel to the flat blades 31 and 32 of the movable contact assembly 3, with the first 25 and second 26 segments facing said movable contact assembly 3.
  • the first segment 25 is substantially perpendicular to said third segment 27, with the second segment 26 connecting said first segment 25 to said third segment 27 and being inclined toward said fourth segment 28 so that the length l of the third segment 27 is shorter than the width L of said substantially flat body 20 as measured in correspondence of the connection point 29 between said first 25 and second 26 segment.
  • the width L of the flat body 20 is considered as the distance between the connection point 29 and the fourth segment 28 as measured along the line drawn from the connection point 29 perpendicularly to the fourth segment 28, as shown in figure 4 .
  • the prearcing time is reduced thereby greatly minimizing the erosion phenomena on the fixed contact.
  • the length l of said third segment 27 is between 0.75L and 0.85L, and more preferably is between 0.77L and 0.83L.
  • the base 23 of the substantially flat body 20 is substantially parallel to the third segment 27.
  • the performances of the Medium Voltage line switch contact arrangement 1 of the invention can be further improved by properly dimensioning the length and inclination of the second segment 26.
  • the distance d between the third segment 27 and the connection point 29 between the first 25 and the second 26 segments is preferably between 0.30D and 0.40D, where D is the length of the substantially flat body 20 as measured from the base 23 to the third segment 27.
  • the distance d between said third segment 27 and the connection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D.
  • the distance d between said third segment 27 and the connection point 29 is considered as the distance between said connection point 29 and the third segment 27 as measured along the line drawn from the connection point 29 perpendicularly to the third segment 27.
  • said first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to said third segment 27.
  • the substantially flat body 20 has a substantially rectangular shape with a corner, i.e. the one facing the movable contact assembly 3, cut away.
  • the length D of the substantially flat body 20 substantially corresponds to the length of the fourth segment 38, while the width L of the flat body 20 substantially corresponds to the distance between said substantially parallel first 25 and fourth 28 as measured along their perpendicular line.
  • the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded.
  • the length l of the third segment 27 is considered as the distance between the points 81 and 82, i.e. the distance between the interception point 81 of the prolongation of the fourth 28 and third 27 segments and the interception point 82 of the prolongation of the second 26 and third 27 segments.
  • Figure 4 shows how length l is measured in a particular embodiment of the invention.
  • edges of said substantially flat body 20 defined by said first 25, second 26, third 27 and fourth 28 segments are rounded.
  • said edges are preferably not constituted by flat surfaces perpendicularly connected to the contact surfaces 21 and 22, but they have at least a partially curved profile.
  • the length l of said third segment 27 is between 0.77L and 0.83L
  • the distance d between said third segment 27 and the connection point 29 between the first 25 and the second 26 segments is between 0.33D and 0.38D
  • the first 25 and fourth 28 segments are substantially parallel to each other and substantially perpendicular to said third segment 27
  • the corners between said second 26 and third 27 segments and between said third 27 and fourth 28 segments are rounded
  • the edges of said substantially flat body 20 defined by said first 25, second 26, and third 27 segments are also rounded.
  • the Medium Voltage line switch contact arrangement 1 of the invention usually also comprises an arc chamber 5.
  • the arc chamber 5 comprises a supporting element 51 which is fixed to said fixed contact 2 and extends in the direction of the movable contact assembly 3.
  • a hole can be provided in the flat body 20 of the fixed contact 2, the supporting element being fixed by fixing means (not shown in the figures), e.g. by screw means, to said hole.
  • fixing means not shown in the figures
  • Other fixing arrangement are also possible.
  • the arc chamber 5 further comprising a plurality of plates 52 having a first end 53 operatively connected to said supporting element 51 and a second end 54 which is substantially U shaped and defines a passage for said first 31 and second 32 flat blades of said movable contact assembly 3.
  • the U shaped end can be obtained by using two substantially parallel arms 541 and 542 protruding from the body of the plates 52.
  • Other set-up of the arc chamber 5, which in itself is well known in the art, are also possible.
  • the Medium Voltage line switch contact arrangement 1 of the invention comprises an arcing electrode 55 which is positioned on the supporting element 51 of the arc chamber 5.
  • the arcing electrode 55 is preferably positioned in correspondence of the connection point 29 between said first 25 and second 26 segments and protrudes in the direction of said movable contact assembly 3, so as to be closely above the first 31 and second 32 flat blades of the movable contact assembly 3, when said blades 31 and 32 are in the proximity of the substantially flat body 20 of the fixed contact 2.
  • the use of the arcing electrode 55 helps improving the performances of the Medium Voltage line switch contact arrangement 1 of the invention.
  • inception of the arc does not occur on the fixed contact 2 but on the arcing electrode 55. Consequently the arc burns far away from the fixed contact, thereby avoiding or at least minimizing the problems of contact erosion due to the arc.
  • the Medium Voltage line switch contact arrangement of the present invention has a number of advantages with respect to the Medium Voltage line switches equipped with conventional contact arrangements. For instance, thanks to the particular shape and positioning of the fixed contact, prearcing time is considerably reduced, thereby reducing also the erosion phenomena on the fixed contact.

Landscapes

  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (6)

  1. Mittelspannungsnetzschalter-Kontaktanordnung (1), umfassend einen festen Kontakt (2) und eine bewegliche Kontaktanordnung (3), die mit dem festen Kontakt (2) operativ verbindbar ist, wobei die bewegliche Kontaktanordnung (3) ein erstes (31) und ein zweites (32) im Wesentlichen flaches Blatt parallel zueinander aufweist, wobei die flachen Blätter (31, 32) schwenkbar auf einem Träger montiert und mit dem festen Kontakt (2) drehbar verbindbar sind;
    wobei der feste Kontakt (2) ein Kontaktelement mit einem im Wesentlichen flachen Körper (20) mit einer rechteckigen Form mit einer abgetrennten Ecke und einer ersten (21) und einer zweiten (22) Kontaktfläche umfasst, die durch eine Basis (23), die mit einem Kontakthalter (24) verbunden ist, und durch ein erstes (25), ein zweites (26), ein drittes (27) und ein viertes (28) Segment begrenzt sind,
    wobei das erste Segment (25) im Wesentlichen senkrecht zu dem dritten Segment (27) ist,
    wobei das zweite Segment (26) der beweglichen Kontaktanordnung (3) zugewandt ist, wenn die Blätter (31, 32) in der Nähe des im Wesentlichen flachen Körpers (20) sind, wobei das erste (25) und das vierte (28) Segment im Wesentlichen parallel zueinander und im Wesentlichen senkrecht zu dem dritten Segment (27) sind,
    wobei das dritte Segment (27) im Wesentlichen parallel zu der Basis (23) ist,
    wobei das zweite Segment (26) das erste Segment (25) mit dem dritten Segment (26) verbindet und zu dem vierten Segment (28) geneigt ist, so dass die Länge 1 des dritten Segments (27) kürzer ist als die Breite L des im Wesentlichen flachen Körpers (20), gemessen entsprechend dem Verbindungspunkt zwischen dem ersten (25) und dem zweiten (26) Segment,
    wobei der flache Körper abgerundete Ecken zwischen dem zweiten (26) und dritten (27) Segment und zwischen dem dritten (27) und vierten (28) Segment hat,
    dadurch gekennzeichnet, dass der flache Körper abgerundete Kanten hat, die durch das erste (25), zweite (26), dritte (27) und vierte (28) Segment definiert sind,
    wobei die Länge I des dritten Segments (27) zwischen 0,75L und 0,85L liegt, wobei l die Breite des im Wesentlichen flachen Körpers (20) ist,
    wobei der Abstand d zwischen dem dritten Segment (27) und dem Verbindungspunkt zwischen dem ersten (25) und dem zweiten (26) Segment zwischen 0,30D und 0,40D liegt, wobei D die Länge des im Wesentlichen flachen Körpers (20), gemessen von der Basis (23) zum dritten Segment (27), ist.
  2. Mittelspannungsnetzschalter-Kontaktanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Länge I des dritten Segments (27) zwischen 0,77L und 0,83L liegt.
  3. Mittelspannungsnetzschalter-Kontaktanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Abstand d zwischen dem dritten Segment (27) und dem Verbindungspunkt zwischen dem ersten (25) und dem zweiten (26) Segment zwischen 0,33D und 0,38D liegt.
  4. Mittelspannungsnetzschalter-Kontaktanordnung (1) nach Anspruch 1, dadurch gekennzeichnet, dass sie eine Lichtbogenkammer (5) umfasst, die ein Tragelement (51) umfasst, das an dem festen Kontakt (2) befestigt ist und sich in Richtung der beweglichen Kontaktanordnung (3) erstreckt, wobei die Lichtbogenkammer (5) ferner eine Vielzahl von Platten (52) umfasst, die ein erstes Ende (53), das mit dem Tragelement (51) operativ verbunden ist, und ein zweites Ende (54) aufweisen, das im Wesentlichen U-förmig ist und einen Durchgang für die ersten (31) und zweiten (32) flachen Blätter der beweglichen Kontaktanordnung (3) definiert.
  5. Mittelspannungsnetzschalter-Kontaktanordnung (1) nach Anspruch 4, dadurch gekennzeichnet, dass sie eine Lichtbogenelektrode (55) umfasst, die auf dem Tragelement (51) entsprechend dem Verbindungspunkt zwischen dem ersten (25) und dem zweiten (26) Segment angeordnet ist und in Richtung der beweglichen Kontaktanordnung (3) vorsteht.
  6. Mittelspannungsnetzschalter, umfassend eine Kontaktanordnung (1) nach einem der vorstehenden Ansprüche.
EP09159292.3A 2009-05-04 2009-05-04 Mittelspannungs-Hauptschalterkontaktanordnung Active EP2249359B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP09159292.3A EP2249359B1 (de) 2009-05-04 2009-05-04 Mittelspannungs-Hauptschalterkontaktanordnung
ES09159292.3T ES2687407T3 (es) 2009-05-04 2009-05-04 Disposición de contacto de interruptor de línea de media tensión
CN2009102063466A CN101882508A (zh) 2009-05-04 2009-10-15 中压线路开关触头装置及包括该触头装置的中压线路开关
CN2009201787540U CN201608057U (zh) 2009-05-04 2009-10-15 中压线路开关触头装置及包括该触头装置的中压线路开关
RU2010117358/07U RU99898U1 (ru) 2009-05-04 2010-04-30 Устройство контактного узла линейного выключателя среднего напряжения

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09159292.3A EP2249359B1 (de) 2009-05-04 2009-05-04 Mittelspannungs-Hauptschalterkontaktanordnung

Publications (2)

Publication Number Publication Date
EP2249359A1 EP2249359A1 (de) 2010-11-10
EP2249359B1 true EP2249359B1 (de) 2018-08-15

Family

ID=41051990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09159292.3A Active EP2249359B1 (de) 2009-05-04 2009-05-04 Mittelspannungs-Hauptschalterkontaktanordnung

Country Status (4)

Country Link
EP (1) EP2249359B1 (de)
CN (2) CN201608057U (de)
ES (1) ES2687407T3 (de)
RU (1) RU99898U1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2687407T3 (es) * 2009-05-04 2018-10-25 Abb Schweiz Ag Disposición de contacto de interruptor de línea de media tensión
WO2013152555A1 (en) * 2012-04-10 2013-10-17 Abb Technology Ltd. Arc-quenching device of switch for low, medium and high voltage applications
DE102012215479B4 (de) 2012-08-31 2014-08-21 Siemens Aktiengesellschaft Verfahren zum Schließen eines Schalters und Schalter zur Durchführung des Verfahrens
EP3745441B1 (de) * 2019-05-29 2023-07-05 ABB S.p.A. Niederspannungskontaktanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820489A1 (de) * 1988-06-16 1989-12-21 Felten & Guilleaume Energie Gekapselte lasttrennschalteranordnung
DE19904930C2 (de) * 1999-02-06 2000-12-14 Felten & Guilleaume Ag Schalter für den Einsatz in SF6-Mittelspannungsschaltanlagen
ES2687407T3 (es) * 2009-05-04 2018-10-25 Abb Schweiz Ag Disposición de contacto de interruptor de línea de media tensión

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN101882508A (zh) 2010-11-10
CN201608057U (zh) 2010-10-13
EP2249359A1 (de) 2010-11-10
ES2687407T3 (es) 2018-10-25
RU99898U1 (ru) 2010-11-27

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