DESIGN OF A 750 KV BUSHING

Abstract

A survey of literature is done to get the possible detailed information about bushings, but it does not give any existing design in 750 KV range. Therefore it is decided to design 750 KV bushing from very basic considerations. Here we have designed 750 Y,V, 2000A (current rating to conform with D]0 standards) outdoor—immersed bushing. Three types of bushing are designed, viz., Oil Impregnated Paper (OIP), Synthetic Resin Bonded Paper (SRBP) and 'Oil.-filled with metallic cyclindrical equipotentials. Among them, the OIP bushing is found to be most suitable for this ,range. A computer programme is also developed for this design which is also helpful in calculating thermal per-formance of the bushing. The final size of the bushing is proportionately matching with existing designs for other voltage levels.