A 500 kV RIN HV Bushing Has Been Tested

On 21 June 2017, first time in Russia, Izolyator plant successfully completed acceptance tests of a 500 kV HV bushing with solid RIN insulation, intended for power transformers.

The solid RIN insulation (Resin Impregnated Nonwoven) has been developed by Izolyator’s design office in collaboration with partners with the aim to increase water-tight features of the internal insulation of the bushings in severe operation conditions. The main insulation is a nonwoven polymer material that has no cellulose, and is, therefore, hydrophobic and possessing a resistibility to atmospheric humidity and heat resistance. The material is void of water in the first place, which allows to eliminate thermal vacuum drying of wound core. This means a more reliable insulation and a shorter production cycle. In all other details RIN insulation making process is identical to RIP technology. RIN insulation can be used both with porcelain and polymer external insulation. Izolyator has patented RIN trademark and production technology and received certificates of conformity of RIN bushings to Russian and international standards.

The tests became one more practical result and a significant achievement of Izolyator’s technical policy, focused on ensuring high-voltage bushings reliability in any operating conditions.

500 kV RIN bushing at the test center of Izolyator plant

Testing under AC in a series resonance system