What Is Corona Effects and How shield is used to Protect
A corona shield is typically manufactured by first selecting a conductive material such as aluminum or a semiconductor‑impregnated fabric, depending on the application (e.g., high‑voltage bushings or motor windings). The raw material is then cut and shaped using processes like CNC machining, laser cutting, or stamping to form rings or bands with smooth, rounded edges that help distribute the electric field evenly. Next, the parts are deburred, cleaned, and sometimes coated or impregnated with a semi‑conductive layer to enhance shielding performance and prevent localized corona discharge. Finally, the shields are inspected for dimensional accuracy and surface finish, then assembled onto the high‑voltage component (such as bushings, transformers, or stator windings) where they are secured mechanically or bonded in place to ensure reliable long‑term operation
