CA2816373C - Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment - Google Patents
Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment Download PDFInfo
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- CA2816373C CA2816373C CA2816373A CA2816373A CA2816373C CA 2816373 C CA2816373 C CA 2816373C CA 2816373 A CA2816373 A CA 2816373A CA 2816373 A CA2816373 A CA 2816373A CA 2816373 C CA2816373 C CA 2816373C
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- corona
- aluminum spacing
- windproof
- steel wire
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Abstract
The present invention relates to the technical field of long-duration induction withstand voltage test equipment for extra-high voltage and extreme high voltage transformers, in particular to a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment. The windproof corona-resistant expanded conductor comprises a conductive steel wire and an aluminum spacing plate, wherein the conductive steel wire runs through a conductive steel wire mounting hole on the aluminum spacing plate; the number of the aluminum spacing plate may be one or more; a plurality of aluminum spacing plates are arranged on the conductive steel wire at the intervals of 2 meters to 3 meters; and ventilation holes are formed on the aluminum spacing plates. Due to the adoption of the conductive steel wire, the overall strength of the conductor is strengthened; due to the adoption of the 24-bundled conductor, wind resistance is remarkably reduced, and corona is greatly reduced; due to the adoption of the aluminum spacing plates, the weight of the conductor is reduced; the aluminum spacing plates are provided with the holes so as to reduce the overall weight of the conductor as well as the wind resistance. The windproof corona-resistant expanded conductor is proved by application to a field test to achieve remarkable improvements in electric field distribution and mechanical properties and have high popularization and application value.
Description
Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment Technical field of the invention The present invention relates to the technical field of long-duration induction withstand voltage test equipment for extra-high voltage and extreme high voltage transformers, in particular to a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment.
Background of the invention At present, on-site Alternating Current (AC) withstand voltage test on electrical equipment is an effective method for checking whether the equipment is damaged during the transportation process and whether the installation is correct as well as determining whether the cleanness and insulation of the inner part of the equipment meet the ruled requirements, thereby checking the manufacturing and installing quality of the equipment and ensuring safe and reliable operation of the equipment.
In recent years, along with the advancement of the manufacturing technology of the AC withstand voltage test equipment for ultra-high voltage electrical equipment, the effectiveness and reliability of the test are improved greatly; equipment defects are discovered in the test for many times so that technical support is provided for guaranteeing safe and reliable operation of the ultra-high voltage electrical equipment.
Generally speaking, in consideration of the requirements of the high-voltage test on the environment, the AC withstand voltage test is generally performed in the environment with sunny day, moderate wind speed and suitable temperature; and the AC withstand voltage test on the ultra-high voltage electrical equipment is not performed under the windy and sandy weather conditions with a great temperature difference. Transformer substations in most northwest area of China are located on Gobi Desert; and such area is obviously characterized by great temperature difference as well as windy and sandy environment. The disadvantages, such as great wind deviation angle, violent vibration and loud corona noise of the original expanded boosted conductor for AC withstand voltage of the ultra-high voltage electrical equipment are exposed under such weather condition, and various negative factors are brought about to the on-site AC withstand voltage test.
Summary of the invention The purpose of the present invention is to avoid the disadvantages of the prior art and provide a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment, thereby efficiently solving problems existed in the prior art.
In order to realize the above purpose, the technical scheme adopted by the present invention is as follows: the windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment comprises a conductive steel wire and an aluminum spacing plate, wherein the conductive steel wire runs through a conductive steel wire mounting hole on the aluminum spacing plate; the number of the aluminum spacing plate may be one or more; a plurality of aluminum spacing plates are arranged on the conductive steel wire at an interval of 2 bundled to 3 meters; and ventilation holes are formed on the aluminum spacing plates.
Background of the invention At present, on-site Alternating Current (AC) withstand voltage test on electrical equipment is an effective method for checking whether the equipment is damaged during the transportation process and whether the installation is correct as well as determining whether the cleanness and insulation of the inner part of the equipment meet the ruled requirements, thereby checking the manufacturing and installing quality of the equipment and ensuring safe and reliable operation of the equipment.
In recent years, along with the advancement of the manufacturing technology of the AC withstand voltage test equipment for ultra-high voltage electrical equipment, the effectiveness and reliability of the test are improved greatly; equipment defects are discovered in the test for many times so that technical support is provided for guaranteeing safe and reliable operation of the ultra-high voltage electrical equipment.
Generally speaking, in consideration of the requirements of the high-voltage test on the environment, the AC withstand voltage test is generally performed in the environment with sunny day, moderate wind speed and suitable temperature; and the AC withstand voltage test on the ultra-high voltage electrical equipment is not performed under the windy and sandy weather conditions with a great temperature difference. Transformer substations in most northwest area of China are located on Gobi Desert; and such area is obviously characterized by great temperature difference as well as windy and sandy environment. The disadvantages, such as great wind deviation angle, violent vibration and loud corona noise of the original expanded boosted conductor for AC withstand voltage of the ultra-high voltage electrical equipment are exposed under such weather condition, and various negative factors are brought about to the on-site AC withstand voltage test.
Summary of the invention The purpose of the present invention is to avoid the disadvantages of the prior art and provide a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment, thereby efficiently solving problems existed in the prior art.
In order to realize the above purpose, the technical scheme adopted by the present invention is as follows: the windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment comprises a conductive steel wire and an aluminum spacing plate, wherein the conductive steel wire runs through a conductive steel wire mounting hole on the aluminum spacing plate; the number of the aluminum spacing plate may be one or more; a plurality of aluminum spacing plates are arranged on the conductive steel wire at an interval of 2 bundled to 3 meters; and ventilation holes are formed on the aluminum spacing plates.
2 The number of the conductive steel wires is 24; and the cross section area is in a range from 3 square millimetres to 5 square millimetres. The aluminum spacing plate has a diameter range from 40 centimetres to 60 centimetres and a thickness range from 2 millimetres to 4 millimetres. The diameter range of the ventilation holes on the aluminum spacing plate is 5 centimetres to 8 centimetres.
The beneficial effects of the windproof corona-resistant expanded conductor for the withstand voltage test on the extra-high voltage electrical equipment are as follows:
due to the adoption of the conductive steel wire, the overall strength of the conductor is strengthened; due to the adoption of the 24-bundled conductor, wind resistance is remarkably reduced, and corona is greatly reduced; due to the adoption of the aluminum spacing plates, the weight of the conductor is reduced; the aluminum spacing plates are provided with the holes so as to reduce the overall weight of the conductor as well as the wind resistance. As various mechanical properties of the boosted conductor under different weather conditions are calculated in the present invention, the results are more specific; as the electric field problem of the multi-bundled boosted conductor is researched by utilizing a electromagnetic field analysis method, the researching achievements are more theoretical and more reliable in comparison with originally adopted visual inspection or estimate means;
through a comprehensive consideration of a plurality of factors, such as the spacing plate of the boosted conductor, self-weight of the conductor, the electric field distribution and the like, the windproof corona-resistant expanded conductor for the withstand voltage test on the ultra-high voltage electrical equipment is developed successfully; and the windproof corona-resistant expanded conductor is proved by application to a field test to achieve remarkable improvements in electric field
The beneficial effects of the windproof corona-resistant expanded conductor for the withstand voltage test on the extra-high voltage electrical equipment are as follows:
due to the adoption of the conductive steel wire, the overall strength of the conductor is strengthened; due to the adoption of the 24-bundled conductor, wind resistance is remarkably reduced, and corona is greatly reduced; due to the adoption of the aluminum spacing plates, the weight of the conductor is reduced; the aluminum spacing plates are provided with the holes so as to reduce the overall weight of the conductor as well as the wind resistance. As various mechanical properties of the boosted conductor under different weather conditions are calculated in the present invention, the results are more specific; as the electric field problem of the multi-bundled boosted conductor is researched by utilizing a electromagnetic field analysis method, the researching achievements are more theoretical and more reliable in comparison with originally adopted visual inspection or estimate means;
through a comprehensive consideration of a plurality of factors, such as the spacing plate of the boosted conductor, self-weight of the conductor, the electric field distribution and the like, the windproof corona-resistant expanded conductor for the withstand voltage test on the ultra-high voltage electrical equipment is developed successfully; and the windproof corona-resistant expanded conductor is proved by application to a field test to achieve remarkable improvements in electric field
3 distribution and mechanical properties and have high popularization and application value.
Brief description of the drawings Fig. 1 shows a schematic diagram of a structure principle of a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment in the present invention;
Fig. 2 shows a wiring diagram for a test in the present invention; and Fig. 3 shows a sequence diagram of a boosting process for a test in the present invention.
In the figures, 1 indicates the conductive steel wire, 2 indicates the aluminum spacing plate and 3 indicates the ventilation holes.
The present invention is further described below with reference to the embodiments in detail.
Detailed description of the embodiments A detailed description is further made with reference to the best embodiment below:
In the embodiment 1 of the present invention, as shown in the Fig 1 and the Fig 2, the windproof corona-resistant expanded conductor for the withstand voltage test on extra-high voltage electrical equipment comprises a conductive steel wire 1 and an aluminum spacing plate 2, wherein the conductive steel wire 1 runs through conductive steel wire mounting holes on the aluminum spacing plate 2; the conductive steel wire mounting holes are uniformly arranged at the edge of the aluminum spacing
Brief description of the drawings Fig. 1 shows a schematic diagram of a structure principle of a windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment in the present invention;
Fig. 2 shows a wiring diagram for a test in the present invention; and Fig. 3 shows a sequence diagram of a boosting process for a test in the present invention.
In the figures, 1 indicates the conductive steel wire, 2 indicates the aluminum spacing plate and 3 indicates the ventilation holes.
The present invention is further described below with reference to the embodiments in detail.
Detailed description of the embodiments A detailed description is further made with reference to the best embodiment below:
In the embodiment 1 of the present invention, as shown in the Fig 1 and the Fig 2, the windproof corona-resistant expanded conductor for the withstand voltage test on extra-high voltage electrical equipment comprises a conductive steel wire 1 and an aluminum spacing plate 2, wherein the conductive steel wire 1 runs through conductive steel wire mounting holes on the aluminum spacing plate 2; the conductive steel wire mounting holes are uniformly arranged at the edge of the aluminum spacing
4 plate 2; the number of the aluminum spacing plate 2 may be one or more; a plurality of aluminum spacing plates are arranged on the conductive steel wire at intervals of 2 meters; and ventilation holes 3 are formed on the aluminum spacing plates 2.
The number of the conductive steel wires 1 is 24; and the cross section area of the conductive steel wires 1 is 3 mm2. The aluminum spacing plate 2 has a diameter of 40 cm and a thickness of 2 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 5 cm.
In the embodiment 2 of the present invention, different from the embodiment 1, the intervals among the aluminum spacing plates are 3 meters and the cross section area of the conductive steel wire 1 is 5 mm2. The aluminum spacing plate 2 has a diameter of 60 cm and a thickness of 4 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 8 cm.
In the embodiment 3 of the present invention, different from the embodiment 1, the intervals among the aluminum spacing plates are 2.5 meters and the cross section area of the conductive steel wire 1 is 4 mm2. The aluminum spacing plate 2 has a diameter of 50 cm and a thickness of 3 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 7 cm.
The windproof corona-resistant expanded conductor for the withstand voltage test on extra-high voltage electrical equipment has successfully completed the AC
withstand voltage tests on tank-type breakers for Dunhuang 750 kV transformer substation and Jiuquan 750 kV transformer substation, effectively checked the quality of the links such as transportation, installation and the like of the tank-type breaker and guaranteed safe and steady operation of the equipment. The test wiring is as shown in the Fig. 2; and in the Fig. 2, Tr is a voltage regulator, T is an exciting =
transformer, L is a reactor, Ck is a voltage divider capacitor, Cx is a tested article, PS
is a power source and CT is a current transformer. The switch-on opposite-ground (three-phase parallel connection) withstand voltage is performed in the withstand voltage test; one end in the switch-off state is boosted while the other end is grounded.
The boosting process is as shown in the Fig. 3; and in the Fig. 3, UF is a test voltage and UF=768 kV; U is a rated voltage and U=800 kV; and the test data are as shown in Table 1, Table 2, Table 3 and Table 4.
Table 1. Withstand voltage test data of 7550 switch Temperature: 28 C; wind power: level 2 Withstand Voltage Corona Wind deviation voltage Test conclusion (kV) noise (dB) angle (degree) time (min) 462 5 20 5 Pass withstand voltage test 560 3 30 5 Pass withstand voltage test 768 1 45 5 Pass withstand voltage test Table 2. Withstand voltage test data of 7540 switch Temperature: 23 C; wind power: level 4 Voltage Withstand Corona Wind deviation (kV) voltage Test conclusion noise (dB) angle (degree) time (min) 462 5 20 10 Pass withstand voltage test 560 3 30 10 Pass withstand voltage test 768 1 45 10 Pass withstand voltage test From the Table 1 and the Table 2, the windproof corona-resistant boosted conductor has low corona noise in the on-site test and small wind deviation angles under 2-level and 4-level wind power; and the windproof conductor has good windproof corona-reducing performance.
Table 3. Withstand voltage test data of 7520 switch Temperature: 18 C; wind power: level 4 Voltage Withstand Corona Wind deviation Test conclusion (kV) voltage noise (dB) angle (degree) time (min) 462 5 15 10 Pass withstand voltage test 560 3 20 10 Pass withstand voltage test 768 1 35 10 Pass withstand voltage test Table 4. Withstand voltage test data of 7540 switch Temperature: 18 C; wind power: level 3 Withstand Voltage Corona Wind deviation voltage Test conclusion (kV) noise (dB) angle (degree) time (min) 462 5 15 5 Pass withstand voltage test 560 3 20 5 Pass withstand voltage test 768 1 35 5 Pass withstand voltage test From the Table 3 and the Table 4, the windproof corona-resistant boosted conductor has low corona noise in the on-site test and small wind deviation angles under 2-level and 4-level wind power; and the windproof conductor has good windproof corona-reducing performance.
The number of the conductive steel wires 1 is 24; and the cross section area of the conductive steel wires 1 is 3 mm2. The aluminum spacing plate 2 has a diameter of 40 cm and a thickness of 2 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 5 cm.
In the embodiment 2 of the present invention, different from the embodiment 1, the intervals among the aluminum spacing plates are 3 meters and the cross section area of the conductive steel wire 1 is 5 mm2. The aluminum spacing plate 2 has a diameter of 60 cm and a thickness of 4 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 8 cm.
In the embodiment 3 of the present invention, different from the embodiment 1, the intervals among the aluminum spacing plates are 2.5 meters and the cross section area of the conductive steel wire 1 is 4 mm2. The aluminum spacing plate 2 has a diameter of 50 cm and a thickness of 3 mm. The diameter of the ventilation holes 3 on the aluminum spacing plate 2 is 7 cm.
The windproof corona-resistant expanded conductor for the withstand voltage test on extra-high voltage electrical equipment has successfully completed the AC
withstand voltage tests on tank-type breakers for Dunhuang 750 kV transformer substation and Jiuquan 750 kV transformer substation, effectively checked the quality of the links such as transportation, installation and the like of the tank-type breaker and guaranteed safe and steady operation of the equipment. The test wiring is as shown in the Fig. 2; and in the Fig. 2, Tr is a voltage regulator, T is an exciting =
transformer, L is a reactor, Ck is a voltage divider capacitor, Cx is a tested article, PS
is a power source and CT is a current transformer. The switch-on opposite-ground (three-phase parallel connection) withstand voltage is performed in the withstand voltage test; one end in the switch-off state is boosted while the other end is grounded.
The boosting process is as shown in the Fig. 3; and in the Fig. 3, UF is a test voltage and UF=768 kV; U is a rated voltage and U=800 kV; and the test data are as shown in Table 1, Table 2, Table 3 and Table 4.
Table 1. Withstand voltage test data of 7550 switch Temperature: 28 C; wind power: level 2 Withstand Voltage Corona Wind deviation voltage Test conclusion (kV) noise (dB) angle (degree) time (min) 462 5 20 5 Pass withstand voltage test 560 3 30 5 Pass withstand voltage test 768 1 45 5 Pass withstand voltage test Table 2. Withstand voltage test data of 7540 switch Temperature: 23 C; wind power: level 4 Voltage Withstand Corona Wind deviation (kV) voltage Test conclusion noise (dB) angle (degree) time (min) 462 5 20 10 Pass withstand voltage test 560 3 30 10 Pass withstand voltage test 768 1 45 10 Pass withstand voltage test From the Table 1 and the Table 2, the windproof corona-resistant boosted conductor has low corona noise in the on-site test and small wind deviation angles under 2-level and 4-level wind power; and the windproof conductor has good windproof corona-reducing performance.
Table 3. Withstand voltage test data of 7520 switch Temperature: 18 C; wind power: level 4 Voltage Withstand Corona Wind deviation Test conclusion (kV) voltage noise (dB) angle (degree) time (min) 462 5 15 10 Pass withstand voltage test 560 3 20 10 Pass withstand voltage test 768 1 35 10 Pass withstand voltage test Table 4. Withstand voltage test data of 7540 switch Temperature: 18 C; wind power: level 3 Withstand Voltage Corona Wind deviation voltage Test conclusion (kV) noise (dB) angle (degree) time (min) 462 5 15 5 Pass withstand voltage test 560 3 20 5 Pass withstand voltage test 768 1 35 5 Pass withstand voltage test From the Table 3 and the Table 4, the windproof corona-resistant boosted conductor has low corona noise in the on-site test and small wind deviation angles under 2-level and 4-level wind power; and the windproof conductor has good windproof corona-reducing performance.
Claims (7)
1. A windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment, wherein the windproof corona-resistant expanded conductor comprises a conductive steel wire and at least one aluminum spacing plate; the conductive steel wire runs through a conductive steel wire mounting hole on the at least one aluminum spacing plate; wherein, when the at least one aluminum spacing plate is a plurality of aluminum spacing plates, the plurality of aluminum spacing plates are arranged on the conductive steel wire at an interval of 2 meters to 3 meters between each of the plurality of aluminum spacing plates;
and ventilation holes are formed on the at least one aluminum spacing plates.
and ventilation holes are formed on the at least one aluminum spacing plates.
2. The windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment according to claim 1, wherein the number of the conductive steel wires is 24, and the cross section area is in a range from 3 square millimetres to 5 square millimetres.
3. The windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment according to claim 1, wherein the at least one aluminum spacing plate has a diameter range from 40 centimetres to centimetres and a thickness range from 2 millimetres to 4 millimetres.
4. The windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment according to claim 1, wherein the diameter range of the ventilation holes on the at least one aluminum spacing plate is 5 centimetres to 8 centimetres.
5. A windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment, wherein the windproof corona-resistant expanded conductor comprises a conductive steel wire and at least one aluminum spacing plate; the conductive steel wire runs through a conductive steel wire mounting hole on the at least one aluminum spacing plate; and ventilation holes are formed on the at least one aluminum spacing plates.
6. The windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment according to claim 5, wherein when the at least one aluminum spacing plate is a plurality of aluminum spacing plates, the plurality of aluminum spacing plates are arranged on the conductive steel wire.
7. The windproof corona-resistant expanded conductor for a withstand voltage test on extra-high voltage electrical equipment according to claim 6, wherein the aluminum spacing plates are arranged on the conductive steel wire at an interval of 2 meters to 3 meters between each of the plurality of aluminum spacing plates.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110039654A CN102175955B (en) | 2011-02-17 | 2011-02-17 | Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment |
| CN201110039654.1 | 2011-02-17 | ||
| PCT/CN2011/079456 WO2012109896A1 (en) | 2011-02-17 | 2011-09-08 | Wind resistant and anti-corona, diameter-expanded conductor for voltage withstand test of extra-high voltage electric power equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2816373A1 CA2816373A1 (en) | 2012-08-23 |
| CA2816373C true CA2816373C (en) | 2018-12-11 |
Family
ID=44519160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2816373A Active CA2816373C (en) | 2011-02-17 | 2011-09-08 | Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102175955B (en) |
| CA (1) | CA2816373C (en) |
| WO (1) | WO2012109896A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175955B (en) * | 2011-02-17 | 2012-09-05 | 甘肃电力科学研究院 | Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment |
| CN103123815B (en) * | 2013-01-21 | 2015-12-09 | 中国电力科学研究院 | The expanding connecting line of a kind of outdoor extra-high voltage experiment |
| CN113866579B (en) * | 2021-11-24 | 2023-06-02 | 国网重庆市电力公司电力科学研究院 | Voltage transformer induction withstand voltage test method and device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB639040A (en) * | 1948-08-11 | 1950-06-21 | British Insulated Callenders | Improvements in electric conductors for high voltage overhead lines |
| AUPQ100399A0 (en) * | 1999-06-16 | 1999-07-08 | Burt, Michael Paul | Line organising device |
| JP4000729B2 (en) * | 1999-12-15 | 2007-10-31 | 日立電線株式会社 | Coaxial cable and manufacturing method thereof |
| CN2582118Y (en) * | 2002-11-11 | 2003-10-22 | 上海电缆研究所 | Expanding conductor |
| FR2874284B1 (en) * | 2004-08-12 | 2006-10-20 | Electricite De France | DEVICE FOR REDUCING THE CROWN EFFECT BY MEDIUM WIRE |
| CN201319269Y (en) * | 2008-12-30 | 2009-09-30 | 安徽电缆股份有限公司 | Extended diameter steel-cored aluminum stranded wire |
| CN201383356Y (en) * | 2009-03-13 | 2010-01-13 | 江苏圣安电缆有限公司 | Expanding aluminium twisted wire |
| CN101847464A (en) * | 2010-04-22 | 2010-09-29 | 江苏通光强能输电线科技有限公司 | Low-corona lead expanded by using round wire-supported profile line |
| CN101834418A (en) * | 2010-05-19 | 2010-09-15 | 江苏捷凯电力器材有限公司 | Twelve-bundle conductor spacer |
| CN102175955B (en) * | 2011-02-17 | 2012-09-05 | 甘肃电力科学研究院 | Windproof corona-resistant expanded conductor for withstand voltage test on extra-high voltage electrical equipment |
| CN201955437U (en) * | 2011-02-17 | 2011-08-31 | 甘肃电力科学研究院 | Wind-protection corona-resistance expanding conducting wire used for withstand voltage test of ultrahigh pressure electric equipment |
-
2011
- 2011-02-17 CN CN201110039654A patent/CN102175955B/en not_active Expired - Fee Related
- 2011-09-08 WO PCT/CN2011/079456 patent/WO2012109896A1/en active Application Filing
- 2011-09-08 CA CA2816373A patent/CA2816373C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012109896A1 (en) | 2012-08-23 |
| CA2816373A1 (en) | 2012-08-23 |
| CN102175955A (en) | 2011-09-07 |
| CN102175955B (en) | 2012-09-05 |
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|---|---|---|---|
| EEER | Examination request |
Effective date: 20160812 |