Characterics of ZnO microvaristors-loaded grading polymeric materials

One of the challenging design aspects in most high voltage equipment is the electric field distribution and its magnitude within and around the equipment. To mitigate this design challenge, a number of solutions were adopted, including profiling of high voltage terminals and use of grading rings. In electrical machines and bushings, non-linear compounds were used to alleviate the effect of highly non-uniform electric field distribution.