Distribution Transformer

Description :Distribution Transformer of Rating 500 KVA, 11KV/415V-240V, 3-phase, 50Hz, Outdoor Type, Plinth Mounted, On load type Tap changer for variation of HV Voltage from +5% to -15% in steps of 2.5%, E nergy efficiency level 3 or better, Oil Immersed, Non-Sealed type (Transformer tank body and cover are bolt ed), Copper wound, Primary Winding in Delta and Secondary Winding in Star (Vector symbol- Dyn11), ONA N Cooled Transformer, Confirming to IS 1180 (Part 1): 2014 with amendment nos. 1,2,3,4 or latest, and sup plied with all standard fittings mentioned in Clause 20.1 of IS 1180 (part 1) latest with condition that Drain- cum-sampling valve will be applicable for all capacity of transformers. Oil temperature indicator & Winding temperature indicators will be provided as per clause 20.2 of IS 1180 (part 1). Terminal arrangement: The t ransformers shall be fitted on high voltage and low voltage sides with outdoor type bushings appropriate v oltage and current ratings. The high voltage bushings (3 nos.) shall confirm to IS/IEC 60137. The low voltag e bushings (4 nos.) shall confirm to IS 7421. Suitable cable-end box along with cable entry hole glands is to be provided at L.T. side. Following has to be submitted by supplier along with supply of material: (i) Type T est report of Transformer having same rating, make (& model if any) and design from NABL accredited lab as per IS 1180 (Part 1) latest. (ii) Routine Test Certificates as per IS: 1180(Part 1) latest. (iii) Special Test C ertificates as per Clause 21.4 sl. No. (a), (c), (d), (e) of IS: 1180 (Part 1) latest. BEE Star rating:- 3 or above (firm shall submit a valid BEE certificate for the offered product with desired BEE star rating). [ Warranty Period: 30 Months after the date of delivery ] ] Consignee SSE/EL/(SOUTH)/KGP, SER West Bengal 8.00 Numbers Inspection Details Stage Inspection Not Required