Calculation of Winding Losses in Shell-Form Transformers for Improved Accuracy and Reliability Part-2: Results and Program Verification

This part of the paper presents calculated results of the program for eddy current losses and circulating currents and losses of several large power transformers. In order to demonstrate the improved accuracy and the new and valuable information provided by the program, the 3D results are compared to 2D results, results of approximate classical formulas of losses, and finally test results on several commercial transformers. The results of a study on the effect of braze splitting and transposition on circulating currents using the 3D loss program are also presented.