EP2159811B1 - Hochspannungsschutzschalter - Google Patents

Hochspannungsschutzschalter Download PDF

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Publication number
EP2159811B1
EP2159811B1 EP20080163376 EP08163376A EP2159811B1 EP 2159811 B1 EP2159811 B1 EP 2159811B1 EP 20080163376 EP20080163376 EP 20080163376 EP 08163376 A EP08163376 A EP 08163376A EP 2159811 B1 EP2159811 B1 EP 2159811B1
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EP
European Patent Office
Prior art keywords
circuit breaker
corona ring
corona
terminals
current interrupter
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
EP20080163376
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English (en)
French (fr)
Other versions
EP2159811A1 (de
Inventor
Johan Lidholm
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 Technology AG
Original Assignee
ABB Technology AG
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Filing date
Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP20080163376 priority Critical patent/EP2159811B1/de
Priority to RU2009121505/07A priority patent/RU2543976C2/ru
Priority to CN200910146660A priority patent/CN101667504A/zh
Publication of EP2159811A1 publication Critical patent/EP2159811A1/de
Application granted granted Critical
Publication of EP2159811B1 publication Critical patent/EP2159811B1/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
    • 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

Definitions

  • the present invention relates to a high voltage live tank circuit breaker.
  • circuit breakers are divided in two classes: live tank circuit breakers (LTB) where the enclosure that contains the breaking mechanism is at line potential and the dead tank circuit breakers (DTB) where the enclosures are at earth potential.
  • LTB live tank circuit breakers
  • DTB dead tank circuit breakers
  • the live tank circuit breakers at high voltage levels have to handle the high potential at the terminal electrodes where the tubes or cables are connected to pass the current through the circuit breaker.
  • the high potential creates high electrical field stress at the terminal electrodes.
  • the terminal electrodes are shielded with corona rings, which purpose is to reduce the local electrical field stress by their smooth shape and relatively large area compared to the terminals.
  • corona rings Two different corona ring designs are common. Either the corona rings are placed as close to the terminal electrode as possible. If capacitors or pre-insertion resistors are used the same philosophy is used. Alternatively, a circular corona ring is placed symmetrically around the circuit breaker center axis.
  • the live tank circuit breaker external isolation media is air.
  • the external insulation is verified with dielectric tests following the requirements in applicable standards. These verifying tests for high voltage circuit breakers include both dry and wet tests since the high voltage circuit breaker is an out door equipment.
  • circuit breaker with corona ring around the treminals is disclosed in US-A-3504142 .
  • the water drops will be affected by the high voltage and change shape; they will be sharper then normal and increase the local electrical field stress.
  • the invention is based on the fact that during switching over voltages during wet conditions the local electrical field at the corona rings lower part will increase in comparison to dry conditions.
  • An object of the present invention is therefore to provide a high voltage live tank circuit breaker with an improved dielectric withstand capability, in particular during wet conditions.
  • a further object of the invention is to provide such a high voltage circuit breaker, which is robust, accurate, uncomplicated, space-saving, and inexpensive, and which has an optimum performance and which fulfills existing safety requirements.
  • a yet further object of the invention is to provide a method for preparing a high voltage circuit breaker which fulfills any of the above objects.
  • a high voltage live tank circuit breaker comprising a support insulator, an elongated current interrupter provided on the support insulator, terminals connected to the ends of the current interrupter, and at least one corona ring arranged to at least partly surround at least one of the terminals.
  • the corona ring is provided with a hydrophobic surface layer to thereby obtain a high voltage live tank circuit breaker with improved dielectric withstand capability in wet conditions.
  • the high voltage live tank circuit breaker comprises a horizontally arranged elongated current interrupter, and a horizontally arranged elongated capacitor and/or resistor connected between the terminals in parallel with the current interrupter, wherein the parts are so arranged that the vertical distance between the inner surface of the lower end of the corona ring and a center axis of the current interrupter, the capacitor, if present, or the resistor, if present, whichever being located lowest, is between about 1.5 and about 4 times shorter than the distance between the inner surface of the upper end of the corona ring and the center axis.
  • a method for preparing a high voltage live tank circuit breaker comprising a support insulator, an elongated current interrupter provided on the support insulator, terminals connected to the ends of the current interrupter, and at least one corona ring arranged to at least partly surround at least one of the terminals.
  • the corona ring is provided with a hydrophobic surface layer.
  • the hydrophobic surface layer is provided by means of spraying or coating the corona ring with hydrophobic material such as silicone rubber or a resin such as a fluorine or silicone resin.
  • high voltage will be used for voltages of 1 kV and higher. It shall, however, be noted that the present invention is primarily intended for high voltage circuit breakers with much higher voltage ratings, such as 245 kV and above.
  • Fig. 1 illustrates schematically in a side elevation view a one-phase high voltage live tank circuit breaker, which comprises two horizontally arranged and serially connected elongated current interrupters 10 arranged on a support insulator 20.
  • the current interrupters 10 may be referred to as breaker or extinguishing chambers and the assembly of two current interrupters 10 may be referred to as a breaking unit.
  • Each of the current interrupters 10 is connected to a terminal 30 at its far end and to a connection flange 32 at its inner end.
  • the circuit breaker comprises a respective corona ring 40 arranged to at least partly surround the terminal 30 connected to the far ends of the serially interconnected current interrupters 10, that is, typically no corona rings are arranged around the connection flanges 32, which interconnects the current interrupters 10.
  • Fig. 2 illustrates schematically in an end view one of the current interrupters 10 and one of the corona rings 40 of the high voltage circuit breaker of Fig. 1 .
  • the supports 41 holding the corona ring 40 are illustrated.
  • each of the corona rings 40 is provided with a hydrophobic surface layer 42.
  • the hydrophobic surface layer 42 is applied by means of spraying or coating the corona ring(s) 42 with hydrophobic material such as a rubber or a resin material, e.g. a silicone rubber or a fluorine or silicone resin.
  • hydrophobic material such as a rubber or a resin material, e.g. a silicone rubber or a fluorine or silicone resin.
  • the hydrophobic surface layer 42 may cover essentially the entire surface of the corona ring(s) 40 or only portions of the surface of the corona ring(s) 40, preferably lower portions of the surface of the corona ring(s) 42.
  • the thickness of the layer 42 is highly exaggerated in Figs. 1-2 .
  • corona rings 40 may be closed or open-ended and they can have different shapes, though the corona rings 40 in Figs. 1-2 are torus shaped.
  • the corona rings are arranged symmetrically around the current interrupters 10 in the lateral plane the sum of distances d1 and d2 corresponds to the inner diameter of the corona rings 40.
  • corona rings there can be arranged more corona rings around each terminal.
  • the corona rings are provided in pairs with a short fixed distance in between.
  • one or each of the corona rings is located such that the vertical distance d1 between the inner surface of the lower end of the corona ring 40 and a center axis 10a of the current interrupter 10 is between about 1.5 and about 4 times shorter than the distance d2 between the inner surface of the upper end of the corona ring 40 and the center axis 10a.
  • each corona ring is preferably arranged such that the vertical distance between the inner surface of the lower end of the corona ring 40 and a center axis of the current interrupter 10, of the elongated capacitor, or of the resistor, whichever being located lowest, is between about 1.5 and about 4 times shorter than the distance between the inner surface of the upper end of the corona ring and that center axis.
  • a three-phase high voltage live tank circuit breaker comprises three of the circuit breaker as disclosed above.

Claims (14)

  1. Hochspannungs-Schaltkammerleistungsschalter, umfassend:
    - einen Stützisolator (20);
    - mindestens einen gestreckten Stromunterbrecher (10), der an dem Stützisolator (20) zur Verfügung gestellt ist;
    - Anschlüsse (30), die mit den Enden des Stromunterbrechers verbunden sind; und
    - mindestens ein Koronaring (40), der zum zumindest teilweise Umgeben eines der Anschlüsse ausgelegt ist,
    dadurch gekennzeichnet, dass
    - der Koronaring (40) mit einer hydrophoben Oberflächenschicht (42) versehen ist.
  2. Leistungsschalter nach Anspruch 1, wobei die hydrophobe Oberflächenschicht (42) aus einem Gummi- oder einem Harzmaterial hergestellt ist, wie zum Beispiel einem Silikongummi oder einem Fluor- oder Silikonharz.
  3. Leistungsschalter nach Anspruch 1 oder 2, wobei die hydrophobe Oberflächenschicht (42) im Wesentlichen die ganze Oberfläche des Koronarings bedeckt.
  4. Leistungsschalter nach Anspruch 1 oder 2, wobei die hydrophobe Oberflächenschicht (42) nur Abschnitte der Oberfläche des Koronarings bedeckt, vorzugsweise untere Abschnitte der Oberfläche des Koronarings.
  5. Leistungsschalter nach einem der Ansprüche 1-4, wobei der Koronaring offen ist.
  6. Leistungsschalter nach einem der Ansprüche 1-5, der einen weiteren Koronaring umfasst, welcher zum zumindest teilweisen Umgeben eines der Anschlüsse ausgelegt ist, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  7. Leistungsschalter nach einem der Ansprüche 1-6, der einen Koronaring umfasst, welcher zum zumindest teilweisen Umgeben eines Weitern der Anschlüsse ausgelegt ist, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  8. Leistungsschalter nach einem der Ansprüche 1-7, der einen weiteren gestreckten Stromunterbrecher (10) und Anschlüsse (30) umfasst, die mit den Enden des Stromunterbrechers verbunden sind, wobei die Stromunterbrecher konzentrisch zueinander angeordnet sind und in Reihe geschaltet sind, wobei einer der Anschlüsse, der zumindest teilweise vom Koronaring (40) umgeben ist, ein äußerer Anschluss der in Reihe geschalteten Stromunterbrecher ist; und der ferner einen Koronaring (40) umfasst, welcher zum zumindest teilweisen Umgeben des anderen äußeren Anschlusses der in Reihe geschalteten Stromunterbrecher angeordnet ist und der mit einer hydrophoben Oberflächenschicht (42) versehen ist, wobei die Koronaringe konzentrisch zueinander angeordnet sind.
  9. Leistungsschalter nach einem der Ansprüche 1-7, wobei der gestreckte Stromunterbrecher im Wesentlichen horizontal angeordnet ist und der Koronaring so angeordnet ist, dass der vertikale Abstand (d1) zwischen der Innenfläche des unteren Endes des Koronarings und einer Mittelachse (10a) des im Wesentlichen horizontal angeordneten gestreckten Stromunterbrechers (10) zwischen etwa 1,5-mal und etwa 4-mal kürzer als der Abstand (d2) zwischen der Innenfläche des oberen Endes des Koronarings und der Mittelachse ist.
  10. Leistungsschalter nach einem der Ansprüche 1-7, der einen im Wesentlichen horizontal angeordneten gestreckten Kondensator (50) und/oder Widerstand (60) umfasst, welcher zwischen den Anschlüssen parallel zum Stromunterbrecher (10) liegt, der im Wesentlichen horizontal angeordnet ist, wobei der Koronaring (40) derart angeordnet ist, dass der vertikale Abstand (d1) zwischen der Innenfläche des unteren Endes des Koronarings und einer Mittelachse (10a) des im Wesentlichen horizontal angeordneten gestreckten Stromunterbrechers (10), des im Wesentlichen horizontal angeordneten gestreckten Kondensators (50) oder des im Wesentlichen horizontal angeordneten gestreckten Widerstandes (60), je nachdem, welcher am tiefsten angeordnet ist, etwa 1,5-mal bis etwa 4-mal kürzer als der Abstand (d2) zwischen der Innenfläche des oberen Endes des Koronarings und der Mittelachse ist.
  11. Dreiphasen-Hochspannungs-Schaltkammerleistungsschalter, der drei der Leistungsschalter nach einem der Ansprüche 1-10 umfasst, einer für jede Phase.
  12. Verfahren zum Bereitstellen eines Hochspannungs-Schaltkammerleistungsschalters, der einen Stützisolator (20); mindestens einen gestreckten Stromunterbrecher (10), der an dem Stützisolator (20) zur Verfügung gestellt ist; Anschlüsse (30), die mit den Enden des Stromunterbrechers verbunden sind; und mindestens einen Koronaring (40) umfasst, der zum zumindest teilweise Umgeben eines der Anschlüsse ausgelegt ist, wobei das Verfahren durch den folgenden Schritt gekennzeichnet ist:
    - Bereitstellen des mindestens einen Koronarings (40) mit einer hydrophoben Oberflächenschicht (42).
  13. Verfahren nach Anspruch 12, wobei der Schritt des Bereitstellens das Besprühen oder Beschichten des mindestens einen Koronarings mit hydrophobem Material umfasst.
  14. Verfahren nach Anspruch 12 oder 13, wobei die hydrophobe Oberflächenschicht (42) aus einem Gummi- oder einem Harzmaterial hergestellt ist, wie zum Beispiel einem Silikongummi oder einem Fluor- oder Silikonharz.
EP20080163376 2008-09-01 2008-09-01 Hochspannungsschutzschalter Active EP2159811B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20080163376 EP2159811B1 (de) 2008-09-01 2008-09-01 Hochspannungsschutzschalter
RU2009121505/07A RU2543976C2 (ru) 2008-09-01 2009-06-08 Высоковольтный выключатель с корпусом под напряжением и способ выполнения такого выключателя
CN200910146660A CN101667504A (zh) 2008-09-01 2009-06-09 高压断路器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080163376 EP2159811B1 (de) 2008-09-01 2008-09-01 Hochspannungsschutzschalter

Publications (2)

Publication Number Publication Date
EP2159811A1 EP2159811A1 (de) 2010-03-03
EP2159811B1 true EP2159811B1 (de) 2013-05-01

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EP20080163376 Active EP2159811B1 (de) 2008-09-01 2008-09-01 Hochspannungsschutzschalter

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EP (1) EP2159811B1 (de)
CN (1) CN101667504A (de)
RU (1) RU2543976C2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109643620B (zh) * 2016-09-01 2019-11-19 Abb瑞士股份有限公司 高压断路器
CN109166754B (zh) * 2018-10-20 2019-12-17 华北电力大学 一种高压断路器及包含高压断路器的电力测量系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504142A (en) * 1967-10-09 1970-03-31 Westinghouse Electric Corp High voltage electric switch
GB1294986A (de) * 1970-01-05 1972-11-01
JPS5866213A (ja) * 1981-10-15 1983-04-20 株式会社東芝 絶緑体
SU1034576A1 (ru) * 1982-01-29 1986-02-28 Ленинградский Ордена Ленина Политехнический Институт Им.М.И.Калинина Лини электропередачи сверхвысокого напр жени
EP0109797A3 (de) * 1982-11-18 1984-06-27 Dow Corning Corporation Polymere Zusammensetzungen resistent gegen Wasser-"Treeing" und elektrisches "Treeing"
FR2707793B1 (fr) * 1993-07-13 1995-08-25 Gec Alsthom T & D Sa Pôle de disjoncteur à deux chambres de coupure en T ou en V.

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RU2009121505A (ru) 2010-12-20
CN101667504A (zh) 2010-03-10
EP2159811A1 (de) 2010-03-03
RU2543976C2 (ru) 2015-03-10

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