These parameters are depending on your design. On the bottom left, you can see help button. Once you clicked it you will see explanation about each parameter.

Hi, I can recommend you to read an article concerned your topic.This article describes the parameters calculation for the three-phase two-winding power transformer model taken from the SimPowerSystems library, which is the part of the MATLAB-Simulink environment. Presented methodology is based on the power transformer nameplate data usage. Particular attention is paid to the power transformer magnetization curve parameters calculation. 

Article THREE-PHASE TRANSFORMER PARAMETERS CALCULATION CONSIDERING T...

Use the help botton in the attached image.

Thank you for your inputs but more clearly how to select  R1,L1,R2,L2,Rm,Xm  approx values without doing any test on transformer?

Hello, I have the same problem. if you got the answer pls help me...