Long-Rod Type Insulators: From 33 KV to 765 KV Range, Standards applicable IEC, ANSI, DIN, and is. Line-Post Insulators: From 33 KV to 66 KV Standards applicable IEC, ANSI, DIN, and IS. Railway Insulators: 25 KV, As per RDSO Specification Station Post Insulators: From 33 KV to 765 KV Range, Standards applicable IEC, ANSI, DIN, and IS. Hollow Insulators: For SF-6 Circuit-Breaker, Bushings, Arresters, Cable Terminations, CT, CVT, PT Range 33KV to 400 KV Maximum dia 650mm, height 2500mm in single piece.