The article is focused on the practical test of stator coil isolation by a continuous winding system. The winding system has two types. Discontinuous winding requires precise manual winding of the material. Discontinuous winding is time consuming. The use of the winding machine is limited by a maximum voltage of 11 kV. With continuous winding, the machine winding is accurate, the winding time is lower and the winding machine is used for a voltage greater than 11 kV. The disadvantage is the greater number of multi-stage corrosion protection strips that are pressed into the coil. The next part deals with the time sequence in operations and production tests with coils Un = 6 kV and Un = 11 kV. The result of this study is to make the production of stator coils more efficient by means of a machine winding device and suitable determination of types of stator coils.