Repair of 100KVA Transformer at KV School under AGE EM Bhopal

Amount

The following Jobs are required to be carried out for REPAIR OF 100KVA DISTRIBUTION TRANSFORMER AT KV SCHOOL UNDER AGE E/M BAIRAGARH BHOPAL

1. M&L for testing of u/s defective distribution transformer 33/0.433 KV, 100 KVA on site at Bairagarh area, checking and testing with megger and other testing equipments for nature of fault and to shift the defective transformer to workshop for repair then disconnecting all electrical connections from LT/HT sides, neutral strip, earth strips, control cables if any etc complete from transformer, lifting and loading on vehicle through recovery van (crane) or manually as per site condition and transporting it to workshop to carry out further repairs. The following repair jobs under item (a) to (j) including testing and inspection by concerned authority will be carried out. (a) M&L for Dismentling and opening of top cover of transformer for inspection in presence of EIC, taken out complete core, testing and meggering of winding, checking the fault, to check the HT/LT limbs, burnt winding & drain out the oil, testing of its die electric strength and recording all the values and readings etc and to preparethe inspection report. (b) M&L for Removing the existing burnt out winding (HT/LT side) without damaging the core and rewinding both primary and secondary windings with appropriate gauge of super enamelled annealed copper conductor wire with number of turns as per manufacturer recommendation including S&F insulation materials, baking, testing complete as required. Note: Copper scraps will be credit to contractor as per schedule of credit. (c) M&L for filteration of existing transformer oils to remove moisture and metal particles for oil and get it dehydreate to achive dielectric strength of 40 to 60 KVA including top up with new transformer oil as required and servicing of breather assy etc. (d) Removing the existing burned out Tap changer and fixing of new tap changer as per the manufacturer recommendation. (e) Cleaning of tansformer tank from inside, removing the burnt out particles and oil sludge settled in bottom etc and replacement of drain valve. (f) Painting of whole transformer from inside and outside with after preparing the old surface with two coats of synthetic enamel smoke grav paint. (g) Installing the winded cores inside the transformer body, making all connections, fixing to top cover with replacement of 6 mm thick gasket, new bolts nuts and washers and including replacement of 03 Nos post insulators complete. (h) Re inspection to be carried out after completing all the repairs, testing to be done at workshop in presence of EIC before shifting it to site, checking all the parameters and recording all the values and to prepare inspection report. (j) Transporting back to work site (Original site) from Workshop, lifting from transport vehicle with crane and manpower, installing at existing pole mounting the Transformer. 2. Replacement of following parts of defective/unserviceable transformer (a) New Copper wire - 100 kg (b) Tap Changer – 01 No (c) Insulating material - 20 Kg (d) HT bushing - 02 No (e) LT bushing - 01 No (1) LV coil repairing – 02 Coil (9) Breather (Silica gel) – 01 No (h) oil level glass – 01 No 3. M&L in repair for online Filtration and dehydration of HV/EHV grade transformer oil of distribution transformers outdoor type of 33/0.433 KV 100 KVA min three cycle to achieve die electric strength of 40 to 60 KV for 1 minute at 4 mm gap as per relevant is with portable filtration plant, testing of the oil for die electric strength, break down voltage before filtration and after filtration complete all as specified and directed. -120 Ltr Note: (i) Centrifuging Machine with all T&P & testing machine of oil required for dehydration is arrange by contracter (ii) Oil required for topping up the transformer will be measured & paid separatly. 4. Supply, replacement and topping up transformer oil EHV grade as per IS 335 of 1993 Part II having die electric strength of not less than 40KVA in the transformer at various locations complete all as directed. – 220 Ltr Note:- 1. Amount for Schedule of credit for unserviceable items, if any, should be included in quoted Amount. 2. Provide the photos of before and after the work executed.

AKASH ELECTRICAL

Neelam Traders