High voltage corona rings are suitable for the voltage form of alternating current (AC), which can distribute the high voltage evenly around the object to ensure that there is no potential difference (PD) between the various parts of the ring.
The high voltage corona ring are used in high voltage test equipment and power systems (substations, high voltage transmission line, AC voltage system, etc.) and are mainly made of aluminum alloy. Generally the corona ring needs to be polished bright to achieve more smooth and no burr surface finish to ensure better corona control effect.
High Voltage Aluminum Corona Rings/Corona Control Rings/Grading Rings/shielding ring
Raw Material of Corona Ring：ALMg Si 0,5 DIN 9107(EN AW-6060) F22
Grade Aluminum Alloy 3A21/6061/6063
Stainless Steel ASTM 304Copper
Material of Fasteners： ASTM 304 Stainless Steel
Surface treatment: Polishing Silvery Bright, Ra3.2
Other Surface Treatment ：Blue Color Painting/Galvanized/Coating insulating varnish Ring Tube Wall Thickness 2.0mm-10.0mm
Inner Diameter of Ring: Minimum 200mm Outer Diameter of Ring Maximum 22000mm Production Type of Ring Pipe: Bending/Pressure Die Casting
Operating Voltage: 170kV-4200kV