tender for work of replacement of oltc tank top cover of 40 mva tf 1 at 132 kv ss bijnor - continuous centrifuging (minimum 72 hrs.) & circulation of t/f oil in 40 mva t/f-i at 132 kv s/s bijnor till the desired bdv value of the oil & ir values of bushings are achieved including hourly recording all the parameters such as temp., vacuum and insulation resistance etc. centrifuging machine, its operator and all associated t&p shall be arranged by the contractor at his own cost. 2 overhauling of diverter switch & mechanism of oltc of 40 mva t/f-i after draining of oil from oltc chamber flashing with hot t/f oil in oltc chamber and finally filling the fresh centrifuged t/f oil in oltc chamber. 3 replacement of diaphragm of oltc tank of 40 mva t/f-i transformer by same make transformer oltc tank diaphragm lying damaged in other substations of upptcl