Cost Estimate for Repairing and Overhauling of 33/0.420kV, 250KVA, PME Make Station Transformer at 220 KV Sub Station, Motiram Adda, Gorakhpur Under Electricity 400 KV Sub-Station Division, Gorakhpur.

Loading of the defective 33/0.4KV, 250KVA, PME Make Station Transformer at 220 K.V S/S Motiram Adda, Gorakhpur to Repair at Workshop by suitable capacity Hydra on Private Vehicle provided by the Contractor, carriage of same from 220 K.V S/S Motiram Adda, Gorakhpur for Repair at Workshop and safe Unloading & placing at the Workshop.

Cleaning of all parts of transformer including Core, Tank, Cooling Tube Radiators. Minor repair of core, Body of transformer & cooling fins (with proper welding or by using such adhesives to arrest any leakages) as per requirement, fitting & fixing of new parts / usable parts, making connections & assembling the Core and H.T. & L.T. Coils complete in all respect, shifting the job to baking chamber and after proper insulation, re-tanking and filling the T/F Oil duly centrifuged & filtered, making ready the Transformer for test, Testing of the Transformer for all the Routine Tests as per ISS 2026 / 1977. (Test Report Should be provided by the contractor in Hard Copy).

Replacement of burnt & damaged H.T. Coils by new complete with insulation / varnishing after vacuum impregnation in PME Make 250 KVA 33/0.4 KV Transformer. Old and Used Copper Scraps shall be property of Contractor hence rates must be quoted accordingly.

Erasing worn out Paper Insulation from L.T. Coils, Straightening the L.T. Coil Strips, re-covering with Double Paper Insulation (D.P.C.) on naked Strips by D.P.C. Machine and making the 3 Nos. L.T. Coils, with cost of Paper Insulation, Double Paper Insulation covering and making of L.T. Coils only.

Replacement of Insulating materials (L.S.).

Repairing Tap Changer including replacement Tapping Switches etc.

Replacement of Silica gel Breather with fresh Silica gel in place of damaged ones.

Filling and centrifusing of transformer oil by contractor at his own cost ( Fresh Transformer Oil wil be provided by the Department and Centrifuging of Oil to be done by the Contractor till the desired value).

Painting of the Transformer inside with Zinc Chromate Paint & outside with two coats of Smoke Grey colour synthetic enamel Paint.

Loading of the repaired Transformer at Repair Workshop by suitable capacity Hydra on Private Vehicle provided by the Contractor, carriage of same from Repair Workshop to 220 K.V S/S Motiram Adda, Gorakhpur and safe unloading & placing at stores of the Sub-Station.