Work

Transformer work

Shifting/Dragging of Main tank of 63 MVA Transformer up to 20 mtr distance including turning of the tank ,as required alongwith associated accessories from existing place to near open space/safe loading place at 132KV Sub-station Sahara city Homes Lucknow with all due care of safety & precautions.

Additional shifting of Transformer tank upto 275 mtr distance at132 KV Substation Sahara city homes Lucknow (1 Job for every 5 mtr.)

Performing the following precommissioning CT test on all turret CT before erection of 63 MVA TF: a. Ratio Test b. IR test c. Continuity Test d. Winding resistance e. Polarity test f. IR of CFT g. Job for one TF,

Performing pre-commissioning Tan delta test on HV & LV bushings of Transformer before erection of 63 MVA TFs using standard testing kits with valid caliberation certificate. Note: Any other test required by TF manufacturer will be under scope of contractor.

Complete Erection of 132/33KV, 63 MVA Transformer including Radiators,conservator tank,Bushings,Connecting pipe lines, Cooling Fans, M.Box, OTI,WTI ,capillary etcincluding shifting from storage place to erection site.

Top up of fresh Transformer oil from Transformer oil drums in Main tank, consevator tank,up to required level

Centrifuging/Dehydration of the complete Transformer oil of 63 MVA Transformer by ultra high vacuum oil filtration plant(Min 9KL capacity) after connecting the centrifuging pipes with Transformer tank to oil filtration plant. Including taking the BDV & PPM(Kit must be latest calibration date) values of oil and megger values of the Transformer periodically till the required value is achieved. Including filling and topping up of the Transformer oil under vacuum in Main tank , Radiator , Conservator tank etc. and attending the oil leakages if any, will all cost of centrifuging machine , CFM operator , Lubricant and new filters etc.

Performing complete of Transformer with standard Testing equipments with valid calibration certificate. Following tests are to be completed.(a) Tan delta & capacitance measurment at standard frequency.(b) Low voltage testing of Transformer including magnetic balance, magnetizing current, open ckt, short ckt, WRM, vector group, core insulation,IR testing,along with submission of complete test report

Sampling & testing of T/F oil at CPRI or any other NABL testing lab including cost of transportation of sample in standard sampling bottles (adequate no. of bottles to be arranged by contractor). Samples to be taken at following intervals: 1. Before filling in T/F main tank & OLTC-02 samples. 2. Before charging, at top and bottom of main tank & OLTC- 05 samples. Following tests to be performed: i. BDV ii. PPM iii. Tan delta iv. Resistivity v. Interfacial tension. vi. Particle count vii. DGA (one job for each sample.) Note: Any other tests required by T/F manufacturer shall be under scope of contractor.