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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:

+6 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.± 260 kV DC, USA, Vancouver Islands 42km, 1967
2. ± 500 kV DC, USA, Pacific Inertie 1360 km, 1969

3. ±500 kV DC, Canada, Eastern Alberta, 500 km, 2013

4. ±500 kV DC, USA, Dickinson - Coal Creek 687km,1978

5. ± 500 kV DC, USA, Dickinson - Coal Creek 687km, 1978
6-7-8. ± 450&500 kV DC, Canada, Kettle Winnipeg Nelson River, 2x870 km & Bipole III, 1.364 km, 1972 & 2014-15

9. ± 450 kV DC, Canada, Quebec- New England, 1100 km, 1988

8. ±500 kV DC, USA, New England 85 km,1984

9. ±350 kV DC, Labrador-Newfoundland – Muskrat Falls, 2014-15

10. ± 500 kV DC, USA, New England 85 km, 1984

11. ± 350 kV DC, Labrador-Newfoundland – Muskrat Falls,2014

12-13. ±600 kV DC, Brazil, Itaipu 1 & 2, 2 x 800 km, 1984/87

14-15.±600 kV DC, Brazil, Rio Madeira 1&2, 2 x 2500 km, 2012/13
16. ± 250&350 kV DC, Denmark-Norway, Skagerrak  217 km, 1&2;3 1975/1993

17. ±500 kV DC, Finland-Sweden, Fenno Skan 1&2 136 km, 1988/2009

18. ±300 kV DC, Denmark-Sweden,Konti-Skan 1;2 and 3, 1965/1988

19. ±300 kV DC, Sweden, South-West Link – the Southern part, 2012

20. ±200 kV DC, Italy-France, Corsica-Sardinia-Italy 264 km, 1967/1992 

21. ±400 kV DC, Italy-Greece Interconnection, 110 km, 1999

22. ±500 kV DC, Congo DR, Inga-Shaba 1700 km, 2013

23. ±500 kV DC, Mozambique, Cahora Bassa 1420 km, 1978

24. ±500 kV DC, India, Chandrapur Padghe, 752 km, 1997

25. ±500 kV DC, India, Rihand Dadri 814 km, 1987

26. ±800 kV DC, India, Biswanath Agra 1825 km, 2010/11/12

27. ±500 kV kV DC, India, Ballia Bhiwadi 780 km, 2008/2009

28. ±500 kV DC, China, Deyang - Baoji 534 km, 2009

29. ±800 kV DC, China, Hami - Zhengzhou 2208 km, 2013

30. ±500 kV DC, China, Ge Hu 1929 km, 2009

31. ±800 kV DC, China, Jinping - Sunan 2089 km, 2011

32. ±500 kV DC, China, Guizhou - Guangdong 1 & 2 2007 km, 2003

33. ±500 kV DC, China,Tianshengqiao - Guangzhou 1050 km, 2001/2004

34. ±800 kV DC, China, Nuozhadu - Guangdong 1413 km, 2012

35. ±500 kV DC, China, Xiloudu - Guangdong 1251 km, 2012

36. ±500 kV DC, China, Yunnan - Guangdong 1418 km, 2008

37. ±350 kV DC, New Zealand, North South Island 535 km, 1990