Shortbus for the proper place of tape on where to put it that will depend on the following:
1. if the test that im going to do will not show any significant effect on transformer then I might just put tape outer side of core for stator and inner side of core for rotor.
2. if the test will show significant effect on transformer then I might put the tape in between of core and winding. But in this case I have to be very careful as well because tape will give a gap in between the core and winding that might affect the maximum magnetic coupling of winding to the core.
Yes it is submerged in oil and yes you are correct that the enamel insulation is breaking down together with temperature and one more thing is in higher temperature the oil could emit water moisture that would go in between the spaces of core and winding and in between of each loop as well. With water moisture plus temperature then you could have a pressure in the enamel coating that in turn will or may wear that coating.
1. if the test that im going to do will not show any significant effect on transformer then I might just put tape outer side of core for stator and inner side of core for rotor.
2. if the test will show significant effect on transformer then I might put the tape in between of core and winding. But in this case I have to be very careful as well because tape will give a gap in between the core and winding that might affect the maximum magnetic coupling of winding to the core.
Yes it is submerged in oil and yes you are correct that the enamel insulation is breaking down together with temperature and one more thing is in higher temperature the oil could emit water moisture that would go in between the spaces of core and winding and in between of each loop as well. With water moisture plus temperature then you could have a pressure in the enamel coating that in turn will or may wear that coating.