tender for for collection of transformer oil sample and testing at various substation under etd-iv, prayagraj. - collection of transformer oil sample as per standard practice in proper & air tight steel sampling bottle from bottom of t/f installed at following substation under etd-iv, prayagraj. (sample bottle will be provided by contractor on their own cost). 2 220 kv ss sirathu (3x160) mva tf. 3 132 kv ss sirathu (1x63+2x40) mva tf. 4 132 kv ss manjhanpur(1x63+2x40) mva tf. 5 132 kv ss bharwari (1x20+1x40) mva tf. 6 132 kv ss manauri (1x63) mva tf. 7 132 kv ss sarai akil (2x40) mva tf. 8 following testing of above-mentioned sampled t/fs eil required as per latest indian standard certified t/f oil testing laboratory along with proper testing report of individual oil samples. 9 breakdown voltage (is.6792) 10 water content (ppm) (is:13567). 11 dissolved gas analysis (iec 60567).