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Because of the shape of the HTS tapes, the layer winding is not good for high voltage power transformer. The double pancake winding which is one of disk windings is good for the insulation and limitation of voltage stress, but it makes high AC losses. So we have proposed a new winding method which is called continuous disk winding (CDW) for high voltage HTS transformers and has advantages from both layer and double pancake windings. In this paper, we calculated numerically and measured AC losses in the HTS continuous disk winding. 4 kinds of short samples with different numbers of stacked HTS tapes were made and their AC losses were measured. These data were used in the process of calculation, making the result more precisely. Other properties such as the critical current, inductance and capacitance were analysed numerically and tested also. [ABSTRACT FROM AUTHOR]