【Electrical Version】Daily Question 20180218
Thread Content
In the no-load test of a transformer, regarding the relationship between the calculated values of the rated no-load loss p0 and no-load current i0, and the ratio of the transformer’s rated voltage Un to the voltage applied during the test u0 (Un/u0), which of the following descriptions is the most accurate? (The value of u0 ranges from 0.1 to 1.05 times Un.) A. p0 and i0 are proportional to (un/u0); B. p0 is proportional to (un/u0); i0 is also proportional to (un/u0); C. p0 is proportional to (un/u0)^n; i0 is proportional to (un/u0)^m, where n=1.9–2.0 and m=1–2; D. When (un/u0)=1.0, the calculated values of p0 and i0 are equal to the values obtained from experiments. 【Answer】D
D. When (un/u0) = 1.0, the calculated values of p0 and i0 are equal to the experimentally measured values
D. When (un/u0) = 1.0, the calculated values of p0 and i0 are equal to the experimentally measured values
B.p0 is proportional to (un/u0); i0 is proportional to (un/u0);
D. When (un/u0) = 1.0, the calculated values of p0 and i0 are equal to the experimentally measured values
D. When (un/u0) = 1.0, the calculated values of p0 and i0 are equal to the experimentally measured values