(22%) 計算題A1Φ,200kVA,2000V/200V,60Hz transformer gave the followi test data OCT: 200V,20A,200W; SCT: 100V,100A,800W.
(一)、(8%) 1. Find the efficiency at full load, cosθ=0.8.(4%) 2. Find the absolute maximum efficiency. (4%)