Comparing with AC transmission line, DC suspension disc insulator is more stable with less line losses, less line investment, longer transmission distance and higher power. Using in heavy polluted areas, the porcelain material of DC suspension disc insulator has superior characteristics to resist DC ageing.
  The shape is designed with large diameter size and shed rib interleaved structure in order to improve the anti-pollution performance. The cap and pin are designed with zinc sleeve to prevent from DC electrolytic corrosion.