distribution transformer

11KV two winding on load tap changerelectrical distribution transformer: Rated capacity KVAVoltage combinationconnection symbolno-load loss Kwload loss Kwno-load current %short circuit impedance %center distance mmH.V. KVtapping range of H.V.L.V.Kv200035; 38.5±3×2.5%6.3;6.6;10.5;11Yd112.5217.780.76.5107025002.9820.650.7107031503.5424.710.637107040004.2429.20.63107050005.0834.20.6107063006.1636.80.67.510708000YNd118.6140.60.5314751000010.1548.10.5314751250011.9756.90.581475160001469.20.4214752000016.5483.50.4214752500019.5598.80.3520403150023.29118.50.32040 The series of oil-immersed transformer such as S9(10), SF9(10), SZ9(10), SFZ9(10) has a voltage of 35kV and a capacity of 50-50000kVA. This series of products are a new generation products that can remarkably save materials and reduce losses. It is designed on the basis of digesting and absorbing the advanced technology at home and abroad, having hightech content and stronger competitive power. The product SZ1120000/35 new designed have passed the assessment of scientific and technical results by the scientific and technological bureau of Shandong Province. The product possesses the following characteristics: 1)Adopting the electromagnetic calculation procedure of the computer, to optimize the plan of design; By comparing and analyzing the technical parameter and technical and economic index, to confirm the best plan of design. 2)The core adopt the new technology of threegrade and going forward one by one overlapping: The core is high quality coldroll crystallite orientation silicon steel plate which import from Japan. Its section cut straight through is multistage round, miter jointing. Adopting the new technology of two pieces threegrade and going forward one by one overlapping. The new technologys practice cause noload loss average lower 810. It save energy remarkably. 3)The main and vertical insulation of the body of Transformer is on the basic of electric field calculation and model testing, and integrate the successful experience and renew definite. It increase the ability to resist short circuit effectively.