As to the meggar....remember that the perfect insulation is also a perfect capacitor. When you are doing the dielectric absorbtion tests on a motor and developing a polarization index, you are essentially timing the capacitive charging rate of what has become essentially a large capacitor. So depending on the mass of the motor, you can be building a substantial charge in the winding that is totally out of proportion to the initial output of the meggar unit itself.
Very dangerous.
