ABSTRACT
This chapter presents a few benchmark models and results of electric field analysis in bushings, cable terminations as well as insulators under various operating conditions. Numerical computation of electric field for high-voltage system components and devices are carried out to determine the adequacy of insulation to reliably withstand electric stresses that may arise in the system. A high-voltage cable termination typically provides adequate electric stress control for the cable insulation shield terminus; comprehensive external leakage insulation between the high-voltage conductors and grounded ends and proper sealing to prevent the entry of the external environmental elements. Post-type insulators usually act as support or spacer of high-voltage electrode with respect to earthed frame or plane. Bushings are used when a high-voltage conductor is to pass through a barrier having a different potential, for example, an earthed metal tank or an earthed wall.
