Insulators Corona Rings including Aluminum Die Casting Rings and Tube Rings，ARTISAN's Aluminium Corona Ring Casting ensures accurate casting of aluminum corona to allow easy Power fittings to a high voltage equipments for distributing electric field gradients. Dimensional defect on the designed good leads to corona discharge so we deliver this product in precise shape and finish. This product retains dimensional stability even at high temperature which makes it highly preferable for casting aluminum. This product is molded by implementing pioneering extrusion methods under the guidance of skilled professionals. ARTISAN INDUSTRY ensure on-time delivery of this Aluminium Corona Ring Casting in several shapes, designs and finishes to match end customers’ requirements.
What is the Material and Manufacturing Process of Corona Ring ?
It depends on the corona (grading) ring design and manufacturing process.
Aluminum Die cast Corona Rings are usually A380 aluminum die cast aluminum alloys , sand and permanent mold 356 or A356.
Aluminum tube Grading rings(fabricated rings) are usually made from 6061 thin wall tubing or pipe that is formed and welded; with appropriate brackets and other mounting provisions.
Is the chemical composition of high voltage corona ring important for electrical conductivity etc.?
No. It just has to be conductive and bonded to the energized (or grounded) electrode which it is grading. Their function is to increase or expand and reshape the geometry of energized (or grounded) end caps, etc. and smooth the electrostatic field, thereby reducing the voltage gradient on those surfaces to a level below the critical ionization gradient of the surrounding air or other media.
More properly, they are voltage grading rings that also serve to grade the voltage of the insulator, surge arrester, bus clamp, etc. and reduce the overall voltage stress by increasing the coupled capacitance to the surrounding voltage field.
Aluminum is most commonly used for corona rings because of its light weight, relative ease of casting or fabrication, cost and availability but other metals can also be used.