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Sediver HRTG insulators for HVDC applications


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Sediver High Resistivity Toughened Glass for HVDC applications


At the end of the 1950's Sediver was among the first manufacturers to develop insulators for HVDC overhead transmission line applications.
Thanks to this unique and substantial field experience and ongoing research programs with utilities and international experts, the Sediver research team introduced a state of the art new DC insulator using high resistivity toughened glass (HRTG) in the mid 1980's.
This development has largely contributed to establish a high performance benchmark in the industry, including specific criteria later on introduced in IEC 61325 which still is the only international standard describing HVDC performance requirements.


Today, Sediver HVDC experience is:

+8.5 million toughened glass insulators installed all around the world on the most prestigious DC transmission lines up to 800 kV HVDC

+50 years of experience in HVDC applications


Sediver extensive toughened glass HVDC worldwide experience

Map of Sediver HVDC references

1. ±300 kV DC, Denmark-Sweden,Konti-Skan 1;2 and 3, 1965/1988
2. ± 260 kV DC, Canada, Vancouver Islands 42km, 1967
3. ±200 kV DC, Italy-France, Corsica-Sardinia-Italy 264 km, 1967/1992
4. ± 500 kV DC, USA, Pacific Inertie 1360 km, 1969/2014/2017
5-6-7. ± 450&500 kV DC, Canada, Kettle Winnipeg Nelson River, 2x870 km Bipole I, II,& Bipole III, 1.364 km, 1972 & 2014-15
8. ± 250&350 kV DC, Denmark-Norway, Skagerrak 217 km, 1&2;3 1975/1993
9. ±500 kV DC, USA, Dickinson - Coal Creek 687km, 1978
10. ±500 kV DC, Mozambique, Cahora Bassa 1420 km, 1978
11. ± 500 kV DC, USA, New England 85 km, 1984
12. ± 450 kV DC, Canada, Quebec- New England, 1100 km, 1988
13-14. ±600 kV DC, Brazil, Itaipu 1 & 2, 2 x 800 km, 1984/87
15. ±500 kV DC, India, Rihand Dadri 814 km, 1987
16. ±500 kV DC, Finland-Sweden, Fenno Skan 1&2 136 km, 1988/2009
17. ±350 kV DC, New Zealand, North South Island 535 km, 1990
18 ±500 kV DC, India, Chandrapur Padghe, 752 km, 1997
19. ±400 kV DC, Italy-Greece Interconnection, 110 km, 1999
20. ±500 kV DC, China, Tianshengqiao - Guangzhou 1050 km, 2001/2004
21. ±500 kV DC, China, Guizhou - Guangdong 1 & 2 2007 km, 2003
22. ±500 kV DC, China, Yunnan - Guangdong 1418 km, 2008
23. ±500 kV DC, India, Ballia Bhiwadi 780 km, 2008/2009
24. ±500 kV DC, China, Deyang - Baoji 534 km, 2009
25. ±500 kV DC, China, Ge Hu 1929 km, 2009
26. ±800 kV DC, India, Biswanath Agra 1825 km, 2010/11/12
27. ±800 kV DC, China, Jinping-Sunan 2089 km, 2011
28. ±800 kV DC, China, Nuozhadu-Guangdong 1413 km, 2012
29. ±500 kV DC, China, Xiloudu-Guangdong 1251 km, 2012
30. ±300 kV DC, Sweden, South-West Link – the Southern part, 2012
31-32. ±600 kV DC, Brazil, Rio Madeira I&II, 2 x 2500 km, 2012/13
33. ±500 kV DC, Congo DR, Inga-Shaba 1700 km, 2013/2017
34. ±500 kV DC, Canada, Eastern Alberta, 500 km, 2013
35. ±800 kV DC, China, Hami-Zhengzhou 2208 km, 2013
36. ± 350 kV DC, Labrador-Newfoundland – Muskrat Falls,1300 km, 2014
37. ±500 kV DC, China, Jingzhong-Guangxi, 577 km, 2015
38. ±500 kV DC, China, Guanyinyan DC, 700 km, 2015
39. ±800 kV DC, Brazil, Belo Monte I, 2000 km, 2015-17
40. ±200 kV DC, Canada, Maritime link, 2016
41. ±500 kV DC, Ethiopia/Kenya, Kenya-Ethiopia Interconnection, 1045 km, 2016-17
42. ±800 kV DC China, Dianxibei, 1928 km, 2017
43. ±800 kV DC China, Ximeng~Taizhou, 1620 km, 2017
44. ±800 kV DC, Brazil, Belo Monte II, 2300 km, 2017
45. ±800 kV DC, China, ZhaLuTe, 1320 km, 2017