aluminum corona rings

Aluminum Corona Rings

Aluminum corona rings are made of aluminum alloy, which are widely used for high voltage laboratory, bushing, power transformer, capacitor, GIS, substation and insulator manufacturing.

Check out the following buyer’s guide for high voltage testing engineers, researchers and beginners, we’ll offer you the high quality aluminum corona rings with 24/7 custom service to fit your drawing ideas and plans.

Contact our Highv team today to get your aluminum corona rings and solutions.


Aluminum corona rings, also called aluminum anti corona rings or corona control rings, they are the toroids of conductive materials, usually aluminum alloy, which are attached to a terminal of high voltage equipments. The role of the aluminum corona rings are to distribute the electric field gradient and lower its maximum values below the corona threshold, preventing corona discharge. Aluminum corona rings are used on very high voltage power transmission insulators and switchgears, and on scientific research apparatus that generates high voltages.

Aluminum Corona Rings Technical Parameters

Product NameAluminum Corona Rings
Aluminum Corona Ring Raw Material

Grade Aluminum Alloy 3A21/1060/6061/6063 and so on

Matching FastenersASTM 304 Stainless Steel Or Hot Galvanized Steel
Surface FinishPolishing Silvery Bright, Ra3.2 Roughness
Other Surface TreatmentBlue Color Painting/Galvanized/Coating Insulating Varnish
Aluminum Corona Ring Tube Wall Thickness2.0mm-10.0mm
OEM/ODMAs customer’s drawings requirments
Middle Support Plates And BracketsAluminum material or it can be customized as drawing requirement
Inner Diameter of Aluminum Corona RingMinimum 190mm
Outer Diameter of Aluminum Corona RingMaximum 16000mm
Production Type of Aluminum Corona RingPipe Bending/Pressure Die Casting
Operating Voltage170kV-4200kV
Drawings SupportCAD/PROE/UG/SOLIDWORKS, etc
Aluminum Corona Ring Mould At stock or as your drawing new design and production
Aluminum Corona Ring PackagingCarton Box/Wooden Pallet/Wooden Case
Loading PortShanghai/Ningbo/Any Other Port In China

What Are The Features of Aluminum Corona Rings

  1. High strengh
  2. Excellent polishing bright finish
  3. Good corona shielding advantages
  4. High moistureproof
  5. Tasteless&non-poisonous
  6. Anti-causticity
  7. Competitive price with good quality
  8. Low MOQ (1 piece is even acceptable in some special conditions)
  9. Customized sizes and specifications /OEM is also available

Aluminum Corona Rings Applications


HIGHV custom made corona rings are widely used for:

  • High voltage capacitor banks
  • High voltage divider
  • GIS (Gas Insulated Switchgear)
  • Substation
  • Surge arrester
  • Shunt reactor
  • Power transformer
  • Current transformer
  • AC voltage test transformer
  • Voltage transformer
  • Impulse voltage generator and current generator testing system
  • Power cable (accessory)
  • High voltage laboratory (High voltage test equipment)
  • High voltage transmission line (overhead line), etc


1.What Is Corona Ring Packaging?

  1. Highv has professional packaging team who can adopt developed packaging technology and packaging style to ensure the aluminum corona rings packaging quality.
  2. Standard sea packing, the aluminum corona rings packing can be done by wooden case and carton box. The wooden case and aluminum corona rings contact parts must be padded with foamed paper or rubber. Wooden case four corners shall not be smaller than the size of the aluminum corona rings. Corona Ring’s surface is wrapping foam paper, and four sides contacting with wooden case with foam mat protection.
  3. In addition, clear labels are tagged on the outside of the packages for easy identification of the aluminum corona rings measurements and quality information.

2.How To Choose Aluminum Corona Rings Manufacturers?

As the one of leading aluminum corona rings manufacturers in China, Highv is professional at manufacturing and supplying of aluminum corona rings with 30 years experience.

The engineers expert team are skilled at AUTO CAD, PROE, SOLID WORKS and UG softwares for your aluminum corona rings design and production.

You will get the high quality corona rings with affordable price from us.

HIGHV offers complete corona shielding solutions, 24/7 one-to-one free service and support, which is available free.

3.How To Buy Aluminum Corona Rings?

1. Consult: We will recommend the most suitable solutions and corona rings moulds to you after being informed by your inquiries.

2. Quotation: We will offer you with our detail quotation according to the consulted aluminum corona rings. You will get the most suitable specifications, the full support and the affordable price.

3. Process Evaluation: Buyers and our side carefully evaluate and discuss all the details (technical parameters, specifications and business terms) of the order to exclude any misunderstanding.

4. Placing Order: If you have no doubt, we will send you the proforma invoice, and then we will sign a contract with you.

5. Production: We will arrange the corona ring production immediately once receiving your signed purchasing contract and payment deposit. The coming news about production will be updated and informed to the buyer during the corona rings production.

6. Quality Control: The spirit of our company is that safety is the foundation of production and quality makes customers. We pay more attention to quality support, supply scope, inspection, testing standard, shipment packing, after-sales service.

7. Delivery: We will arrange the delivery as the terms in the contract after the confirmation by the buyer.

8. Custom Clearance: We will supply and deliver all the necessary shipping documents to the corona ring buyer and ensure a smooth customs clearance.

9. Support and Service: We will offer professional technical support and free service by Phone, Email, Skype, WhatsApp, Online Live Chat, Remote Service. We also have door-to-door service in some areas.

4.What Are Aluminum Corona Rings Surface Treatment?

Usually the polishing silvery bright is the final main surface finish of aluminum corona rings not only for the indoor high voltage laboratory centers but also for the outdoor transmission lines.

The surface finish roughness is Ra3.2. The corona rings production process is according to DIN ISO2768-MK general tolerances.

Other manufacturing standard includes general tolerances for welded constructions, tolerances for lengths, angles, tolerances for shape and position, etc will be in accordance with EN ISO 13920-B-F.

5.What Is MOQ of Aluminum Corona Ring?

If the mould is ready on stock, the MOQ will be less. 1 piece aluminum corona ring is acceptable.
If you need customized ones, the trial order MOQ is will be negotiated.

6.What Is The Delivery Time?

It depends on your aluminum corona rings order total quantity.
Usually from the start of the order to the completion of production for about 2-3 weeks.

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