The following file presents how to do the polarity test on a open circuit transformer using only the voltmeters.
Please, don't forget to rate it if it is of any help .
Douglas Amaral (2020). Polarity Test of a Tranformer (https://www.mathworks.com/matlabcentral/fileexchange/65383-polarity-test-of-a-tranformer), MATLAB Central File Exchange. Retrieved .
Added a picture