Porcelain insulator The main products include: 1.All kinds of overhead line insulators:high voltage disc insulator, pin insulator, cross-arm insulator, etc. 2. Station insulators: outdoor and indoor post insulator, station insulator, bushing. Equipment:10-35kv fuse drop-off switch, 10-35kv zinc-oxde silicon arestor, and 10-35kv isolate switch. 4.Porcelain bushing.