Installation of the first in Russia 252 kV bushing with RIN-insulation for pilot operation
On May 27, 2019, in the Vladimir region, the installation of the first in Russia 252 kV bushing with solid internal RIN-insulation for pilot operation was carried out.
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 high-voltage bushings in severe operating conditions or for situation when operating and storage conditions are violated.
The main insulation is a nonwoven polymer material that has no cellulose, and as a consequence possessing extremely high hydrophoby and resistibility to atmospheric humidity, which virtually eliminates any moistening of insulation.
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The bushing is installed to replace the outdated analogue with paper-oil insulation on a 40 MVA transformer at the 220 kV Dalnyaya substation of the Main Power System of the Centre — an affiliate of the Federal Grid Company of the Unified Energy System.
Preparing the 252 kV bushing with RIN-insulation for installation on a 40 MVA transformer at the 220 kV Dalnyaya substation in the Vladimir region
The installation work was led by Vitaly Vasin, head of the 220 kV Dalnyaya substation, and Dmitri Mashinistov, head of SVN-Service at Izolyator company.
Installation of a 252 kV bushing with RIN-insulation on a 40 MVA transformer at the 220 kV Dalnyaya substation in the Vladimir region
Izolyator continues to search and implement progressive and most efficient technical solutions aimed at improving the reliability, ease of operation and durability of electric power equipment.