Comparison of losses and flux distribution in 3 phase 100 kVA distribution transformers assembled from various type of T-Joint geometry

Abstract

This paper describes results of an investigation of the variation of power loss, building factor, flux leakage and flux distribution in 3-phase model transformer cores assembled from various type of T-joint geometry. The loss of the core with T-joint 60° was 10%, 12% and 15% better than the core with T-joint 45°, T-joint 23° and T-joint 90° respectively and 1.7 T, 50 Hz. The flux lines showed that flux penetration into the central limb was an important factor in causing the differences in performance.