tender for oil testing of transformer at various sub-stations under electricity transmission division-i, basti. ; 1 oil testing of main tank bottoms sample of power t / f of various 400 / 220 / 132 kv s / s under etd-i basti. from nabl accredited lab as per is 2 dissolved gas analysis ( iec 60567 / astm d 3612 ) 3 water content ( ppm ) ( is 13567 / iec 60814 ) 4 tan delta ( is 6262 / iec 60247 ) 5 resistivity ( is 6103 / iec 60247 ) 6 ift ( is 6104 / astm d971 ) 7 providing of required oil sampling bottles and collecting of oil sample from various s / s then carriage of sampling bottles from s / s to oil testing laboratory. ( total 27 sample )