Figure 4. Cruciform cores with circular coil

From

Design and Analysis of Losses in Power Transformer

E.A. Anazia, E. S Ugochukwu, J. C. Onuegbu, Onyedikachi S.N

American Journal of Electrical and Electronic Engineering. 2017, 5(3), 94-101 doi:10.12691/ajeee-5-3-4