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For the design of 20 kV cable accessories, a stress-cone with semi conductive ZnO microvaristors is examined using finite element method (FEM) simulations. It is virtually prototyped for various geometric design parameters and benchmarked by applying a test voltage. Based on the results, an optimal design is chosen and compared to standard cable accessories in virtual and experimental lightning surge tests in a high voltage laboratory.
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Weida et al. (2011) studied this question.
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