Comparison of assumptions in computation of short circuit forces in transformers

This paper describes the modeling of shell type distribution transformers w ith varying degrees of complexity. Results from several types of studies ar e reported and used to evaluate the effectiveness of FEA methods for resolv ing the forces exerted on the coils of a single- phase shell form transform er. The sensitivity of these methods to the very small changes in configura tion due to manufacturing tolerances or operation are investigated. Several types of analysis were performed and compared to determine the best approa ch for design or failure analysis.