Manufacturing , Testing , Supply , Erection And Commissioning Of 3 Nos . 20 Mva , 11/132Kv Generator Transformers For Mukerian Hydel Project , Talwara , Punjab ( 2 Nos . ) And Ubdc Hydel Project , Malikpur , Pathakot , Punjab ( 1 No . ) , Part I : Supply , 20 Mva , 11/132Kv , Onan Cooled , Oil Immersed Outdoor Type Generator Transformer Suitable For 3-Phase , 50 C/S Frequency , Delta-Star Connected In Accordance With Iss Vector Group Yd 11 With Neutral Solidly Earthed On Hv Side . The Transformer Will Be Fitted With Off Ckt Tap Changer Of Easun-Mr/ Telk/ Bhel/ Ngef/ Cgl/ Ctr/ Paragon Associates/ Alwaye Make Type 66 Kv , 300 Amps Rating For Voltage Variation On Hv Side To Give 142 . 5 Kv , 139 Kv , 135 . 5Kv , 132 Kv And 128 . 5 Kv With Lv Constant . Percentage Impedance On 20 Mva Base At 75 Deg . C Shall Be As 10% + Tolerance As Per Is-2026 Part-Ii Latest Edition . The Transformer Shall Be Able To Operate Continuously For 10% Overload Capacity . The Transformer Shall Be Dispatched Oil Filled . Transformer Oil ( Napthenic Base ) For Radiators& Conservators Etc . Alongwith 10% Extra Quantity Shall Be Dispatched Directly In Non-Returnable Epoxy Coated Steel Drums . The Transformer Shall Be Complete With All Fittings And Accessories As Per Specification . The Following Extra Spares With Each Transformer Shall Form Part Of Supplies . , Hv Line End Bushing Complete , Lv Line End Bushing Complete , Hv Neutral End Bushing Complete , Complete Sets Of Gaskets , Wti With Remote Indicator , Magnetic Oil Level Gauge , Oti With Remote Indicator , Silica Gel Container Along With Silicagel ( For One Time Filling ) For Main Tank , Pressure Relief Valve , Buchholz Relay , Dial Type Thermometer For Oti , Switches , Fuses , Relays For Electric Control Ckt . , Short Circuit Test Charges For 1 No . Gt ( If Applicable ) , Part Ii : Erection And Commissioning , Erection , Commissioning Of 20 Mva , 11/132Kv , Onan Cooled , Oil Immersed Outdoor Type Generator Transformer .
