Measurement of overall power loss and flux leakage in M4 grain-oriented silicon iron assembled with 45o T-joint of three phase transformer core

In this paper, the result of an investigation on the effect of using M4 Grain-Oriented Silicon Iron core material to the 100kVA three phase distribution transformers has been analyzed. The investigation includes the variation of power loss and flux leakage with 5mm different overlap length with staggered yoke and limb configuration. Both power loss and flux leakage has been measured using no-load test with 15 layer of lamination. The power loss of the transformer model core at the operation mode flux density, 1.5T is 1.079W/Kg. The flux leakage at T-joint is observed to be higher than that in the corner joint with 47.3uT and 37.6uT respectively during operation mode, 1.5T.