72.5kV, 50Hz, Post Type 1Ph Outdoor, 800/700/600/500/400/300/200/100/1, Oil, 4 Core, 16kA/1Sec, Core 1 Mtrg with 5A Secondary, Class0.5 (except Class1.0 on 100/5), 30VA, Core 2 Protn 0.05PL250 @100/1, Core 3&4 Protn 2.5P150 @100/1, Bonner Stanger, Contract N28/80/2, YOM 1980