Frequently Asked Questions

Take good care of your every guest,
and leave the technical issues to us.


General Questions

We are expert manufacturer in corona rings and corona shielding parts production with 30 years of rich experience.

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

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

Our professional technical engineers team means we are available to you at any time. We can answer your questions about our products and solutions or offer comprehensive service for you.

Highv devotes to built a long term, expert experience, fast response service and team work. Integration services and supports are
available according to your requirements, the detailed list are below:

  • Project consultation service
  • Drawing design service
  • Special packaging solution service
  • Operative service
  • Maintenance service
  • Training in operation&user service
    Customized mold part service
    Pre-sales service, sales service and after-sales service

Services Information

For 24/7 monitored technical support on products and corona shielding solutions

Email us or call us any time, any day.

We’ll have your problem fixed in short time.

The first and most important among our pre-sales support is, at every stage, providing comprehensive information for you, communicating with you to determine your unique products needs, finally helping you to make the most reasonable purchasing decisions.

For example, when you want to purchase corona rings from Highv, the following information should be clarified before order:

  • Detailed Drawings (CAD/PRO-E/UG/SOLIDWORS software support)
  • Application (High Voltage Bushing, Power Transformer, etc.)
  • Material Grade (Aluminum Alloy, Stainless Steel, Copper, etc.)
  • Dimensions (Tube Wall Thickness, Outer Diameter, Others)
  • Surface Treatment (Polishing Bright, Blue Color Painting, Galvanized, Coating Insulating Varnish, Anodic Oxidation, etc.)
  • Production Type of Corona Ring (Pipe Bending or Pressure Die Casting)
  • Voltage Class (170kV, 230kV, 500kV, 800kV, 1100kV, etc.)
  • Packaging Type (Carton Box, Wooden Pallet, Wooden Case)
  • Delivery Time (15-20 Working days After Confirmed The Deposit)
  • Quoted Term (EXW, FCA, FOB, CFR, CIF, DDP, etc.)

If you want to buy other products from us or require service support, please don’t hesitate to contact us at any time.

We have powerful stock of many shielding parts’ moulds. If your request samples are the same size in our stock, we will deliver them by international express for you.

The samples fee and express charge should be paid by customers.


Quality Questions

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.
We have passed ISO9001 quality management system certification.

Quality Control Process:
1) Checking the metal raw material after they reach our factory- Incoming quality control
2) Checking the details before the production line operated
3) Have full inspection and routing inspection during mass production-In process quality control
4) Checking the goods after they are produced- Final quality control
5) Checking the goods before shipment

At the same time, we will help take photos and shoot videos for you if you need. Every corona ring and shielding product will be fully assembled and carefully tested before packing and shipping.

  • Checking and packaging every corona ring and shielding goods well before shipment.
  • Do reinforce cargo well in the container.
  • Discussing with our shipping agent and loading a reasonable amount of goods in the container.

Life is too short for you to worry about that job. Let us do it for you. We Highv administer products’ claims and can help save you the cost.

Once the cargo is arrived in your warehouse, if there are any quality problems, you just provide the photos of damaged parts, then we will provide free products for you. According to the number of products, we will provide easily damaged accessories for free. We also can provide technical support if you need.

For more information and warranty support of our products and solutions, contact us via email or by phone here.


Quick & Reliable Services

Call us any time or email us for more benefits to support your power and industry projects.