EP2159811A1 - Hochspannungsschutzschalter - Google Patents
Hochspannungsschutzschalter Download PDFInfo
- Publication number
- EP2159811A1 EP2159811A1 EP08163376A EP08163376A EP2159811A1 EP 2159811 A1 EP2159811 A1 EP 2159811A1 EP 08163376 A EP08163376 A EP 08163376A EP 08163376 A EP08163376 A EP 08163376A EP 2159811 A1 EP2159811 A1 EP 2159811A1
- Authority
- 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.)
- Granted
Links
- 230000005661 hydrophobic surface Effects 0.000 claims abstract description 14
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 239000012212 insulator Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920002050 silicone resin Polymers 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000004945 silicone rubber Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
Images
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.
- 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.
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 true EP2159811A1 (de) | 2010-03-03 |
EP2159811B1 EP2159811B1 (de) | 2013-05-01 |
Family
ID=40342990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20080163376 Active EP2159811B1 (de) | 2008-09-01 | 2008-09-01 | Hochspannungsschutzschalter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2159811B1 (de) |
CN (1) | CN101667504A (de) |
RU (1) | RU2543976C2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018041874A1 (en) * | 2016-09-01 | 2018-03-08 | Abb Schweiz Ag | A high voltage circuit breaker |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3504142A (en) * | 1967-10-09 | 1970-03-31 | Westinghouse Electric Corp | High voltage electric switch |
EP0077516A1 (de) * | 1981-10-15 | 1983-04-27 | Kabushiki Kaisha Toshiba | Isolator |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1294986A (de) * | 1970-01-05 | 1972-11-01 | ||
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. |
-
2008
- 2008-09-01 EP EP20080163376 patent/EP2159811B1/de active Active
-
2009
- 2009-06-08 RU RU2009121505/07A patent/RU2543976C2/ru active
- 2009-06-09 CN CN200910146660A patent/CN101667504A/zh active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3504142A (en) * | 1967-10-09 | 1970-03-31 | Westinghouse Electric Corp | High voltage electric switch |
EP0077516A1 (de) * | 1981-10-15 | 1983-04-27 | Kabushiki Kaisha Toshiba | Isolator |
Also Published As
Publication number | Publication date |
---|---|
RU2009121505A (ru) | 2010-12-20 |
CN101667504A (zh) | 2010-03-10 |
EP2159811B1 (de) | 2013-05-01 |
RU2543976C2 (ru) | 2015-03-10 |
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