Design Methodology for High Voltage Insulators Including Effects of Surface Charging

• Presence of surface charge on the vacuum side of the insulator will significantly alter the critical-to-design electric field metrics.
• OBC method for estimating the surface charge is in good agreement with published test cases.
• The vertical application developed jointly by Varian Medical Systems and Enductive Solutions using the OBC method and the ANSYS solver is an easy-to-use, practical design tool.

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