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Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer

Good quality Grading Ring for sales
Good quality Grading Ring for sales
The products are very accurate according to the Solidworks drawings, and HIGHV team is very professional, ask me every detail before production patiently. It is very lucky that we find this supplier.

—— Michael

We have received the corona rings, and they are exactly what we were hoping for! No problems at all! Thanks again for your assistance.

—— Mark

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Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer

China Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer supplier
Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer supplier Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer supplier Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer supplier Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer supplier

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Product Details:

Place of Origin: CHINA
Brand Name: HIGHV
Certification: SGS/ISO

Payment & Shipping Terms:

Minimum Order Quantity: Negotiation
Price: Negotiable
Packaging Details: 36000 pieces per month for grading rings
Delivery Time: 15-35 days or as per customer's quantity request
Payment Terms: L/C, T/T, Western Union, MoneyGram, D/P, D/A
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Detailed Product Description
Diameter: 1250mm Name: Grading Ring
Voltage: 800kV Usage: For 800KV Power Transformer
Process: Pressure Die Casting Or Pipe Bending And Welding Surface: Polished
Software Support: PRO/E, Auto CAD, Solid Works Roughness: Ra3.2

Aluminium Grading Ring 1250mm Diameter For 800KV Power Transformer



Products Description:


Product Type Aluminium Grading Ring
Type High Voltage Corona Shield/Grading Rings
Size Customized as your drawings

1. Stainless Steel: SS201, SS304, SS316L, SUS420J2, etc

2. Aluminum or Aluminum Alloy: Al6061, Al6063, ZL101, etc

Process Method CNC machining, Turning, milling ,drilling, grinding,Wire EDM etc.
Main Equipment

1.CNC vertical machining center

2.CNC horizontal boring machine

3.High speed CNC lathes machine

4. CNC milling machine

5.General milling machine

6.General manual lathes

7. Flatness grinding machine

8. Manual drilling machine

9.Wire EDM cutting machine

Surface Treatment Polishing, sandblasting, anodizing, brushing, powder coating, electroplating, zinc plating, silk-screen
Tolerance +/-0.1mm
OEM/ODM Service Available
Sample Delivery 5-10 days
Design Software PRO/E, Auto CAD, Solid Works
Trade Terms FOB, CIF, EXW
Payment Terms T/T, L/C, Western Union
QC System Provide Inspection Report Conducted by ISO/TS9001 quality system
Packing Carton, Standard wooden cases
Delivery 15-35 working days upon PO confirmed
Shipment Terms 1) 0-100kg: (DHL/TNT/UPS/FEDEX) / Air freight
  2) >100kg: Sea freight or as customized specification
Applications Field Grading Parts, Hardware Parts, high voltage transmission parts, etc.



Advantages of products:

  1. Competitive price with good quality.
  2. Low MOQ (100 pieces is even acceptable in some special conditions).
  3. Customized sizes and specifications /OEM available.
  4. In Shanghai and Near Ningbo port of China, convenient transportation.
  5. Short lead time (7-30 working days according to order quantity).


Manufacture Process:

  • Drawing(Customized drawings are accepted ) →confirm samples→purchase raw material→ bending→CNC → welding→surface treatment→ Inspection→ Package→Shipment
  • Raw Material: stainless steel, aluminium alloy, copper, etc
  • Surface finish treatment: zinc/nickel/chrome/plated, spray paint, anodizing, polishing and coating etc, etc





Our HIGHV QC department will inspect the products in production and after production.


We promise you as below:


1. Check the raw material before the production.


2. Have random inspection during the production.


3. Make 100% inspection before the shipment.



What is Grading Ring?

Compared to electric porcelain insulator, composite insulator is featured with high intensity, light weight, high wet-flashover and flashover voltage, easy operation maintenance, strong ability of impulse withstand, widely applied to transmission line suspension string, and has spread application in tension string in recent years. Surface field distribution and potential distribution for composite insulator without corona ring is greatly uneven, due to composite insulator structure characteristics and high resistivity feature of silicon rubber, surface field density is highest at mandrel and steel cap joint, distribution voltage is highest at first umbrella dress near high voltage end. Exorbitant surface field density not only generate corona discharge, affect transmission line electromagnetic environment, produce audible sound pollution, but also cause strong electric erosion, causing further insulator aging. Corona ring installation is the normal solution to the problem of uneven potential field density distribution at insulator high voltage end. Installation of corona ring helps to transfer maximum field density from insulator surface to corona ring surface, thus effectively improves electric field distribution on insulator surface.





HIGHV custom-makes solutions and high voltage grading rings for High voltage Surge Arrestor as customer's drawing request.

  • High Voltage Transmission Line,
  • GIS (Gas Insulated Switchgear),
  • Substation,
  • Surge Arrestor,
  • Composite Insulator,
  • Power Transformer, current transformer, AC test transformer, voltage transformer, etc,
  • Power cable (accessory),
  • High voltage laboratory (High voltage test equipment),
  • Impulse voltage test system,
  • HV capacitor bank,
  • HV transmission line (overhead line)





1.Q: Are you a factory or trading company?
A: We are grading rings manufacturing factory in China Mainland.
2.Q: In case the aluminium grading ring exists problem, how to do after sales service?
A: To be honest, mistakes happen in business. But not all the suppliers have the problem-solving ability. Some of them avoid to take responsibility. Some of them want to solve the problem, but have no ability to pay for the mistake. HighV people will be honest to take responsibility for all of our mistakes. We will provide new grading rings required with free of charge by express. More and more customers choose us because we take care of every business.
3.Q: What’s the delivery time?
A: Generally speaking, lead time is 15-35 working days after receive the payment.
4.Q: How does you factory do regarding quality control?
A: HighV people always attach great importance to quality controlling from the very beginning to the very end. We could do the pre-shipment inspection for you.
5.Q: How about the shielding grading ring surface treatment?
A: Hot Galvanized/Polished Bright.
6.Q: What's painting of the grading ring?
A: During normal processing, the grading ring is made of the aluminum and steel. The surface finish does not require the painting.
HighV supply painting service according to customers requirement.
Such as Color painting, Galvanized etc. Other Tungsten plating, copper plating, etc, are available.


Packaging Details:


  • With plastic bag, to be packed in wooden cases
  • To be packed in cartons
  • Use glues tape to seal cartons
  • Deliver out by DHL,FEDEX etc Or according to customers' requirement


MOQ No limited or small order is workable
Port Shanghai port
Payment L/C, T/T
Supply Ability 10000 pcs per month.
Delivery Time Within 15-35 Working Days
Packaging Paper carton, Wooden box, Steel pallet or Customized
Shipment By Sea





Q: What’s your MOQ?

A: Our MOQ is 1 piece.


Q: How long it takes to get quotation?

A: We will submit formal quotation with 24 hours after your products information received.


Q: What’s information needed for accurate quotations?

A: We need drawings, quantity and any other specific requirements.


Q: What’s your production time?

A: Generally, we need 15~35 working days for prototype order, but it can be shortened for urgent order.


Q: How to transport my products?

A: If the goods is less than 200kg, we suggest to use express delivery. We have long-term cooperation with FedEx/DHL/UPS and enjoy much discount. If the goods are more than 200kg, we can arrange shipment as per customer’s requirements.


Aluminium Polished Grading Ring 1250mm Diameter For 800KV Power Transformer




  • Aluminium Corona Ring
  • Aluminium Shielding Tube
  • Aluminium Corona Cover
  • Aluminium Conductor
  • Aluminium Flange
  • Aluminium Corona Sphere

Contact Details
Yangzhou Highv Mechanical And Electrical Equipment Co.,Ltd.

Contact Person: Dong

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