孟加拉国 50MVA 132kV 电力变压器英文招标书.docVIP

TENDER DOCUMENT FOR DESIGN, MANUFACURE, TESTING AND SUPPLY OF 132/33/11 KV, 50 MVA TRANSFORMER FOR132/33 KV SUBSTATION AT GHORASAL THERMAL POWER STATION GENERAL TECHNICAL REQUIREMENTS SPECIFICATION GENERAL TECHNICAL REQUIREMENTS 25/50 MVA 132/33/11kV Power Transformer For 132/33kV Sub-station at Ghorashal Power Station. 132/33/11KV, ONAN rating 25/25/18MVA, ONAF rating 50/50/35MVA, out door mounting, 3 phase. 50 Hz, uniform insulation. 132 ( 4x2 % KV (HV taps on-load operating 9 Nos. of taps), mineral oil immersed equipped with BCT. The supply of transformer will also include suitable size (size will be confirmed during detail Engineering) of MS rail for placing of transformer on foundation. During submission of the bid the technical data requirement of BPDB shall be fully complied by the bidder. In case of any deviation observed in bidders technical data from User’s technical data, the bidder’s bid will be declared non-responsive. The bidder will provide 1(one) engineer for expert service during installation, testing and commissioning of the transformer for 15 days. The following specification are prepared based on the existing one with a view to procure an identical one because both will run in Parallel. Successful Bidder may visit Ghorasal power station for taking necessary data form existing one externally by measurement for detail engineering. The insulation value of HV /MV/ LV sides are: Highest system voltage : 145 / 36/ 12kV Basic insulation Level (BIL) : 650 / 170/ 75 kV Power frequency with stand Voltage (1min) : 275/70/28 kV. The Insulation level of HV MV Neutral Bushing shall be same as Phase Bushings. The HV bushing and bushing for the neutral shall be capacitor type, porcelain being brown glazed. The BCT fitted in the neck of each bushing shall have 2 core 4 tapping of each core. The ratio, accuracy class and burden of BCT are as follows: HV BCT: 1st core: No of tapping: 4 1st tap: 400/1A,3P20, 20VA. 2nd tap: 600/1A, 3P30,30VA. 3rd tap : 750/1