Corona Control Ring In Transmission Line,Grading Ring For Insulator
And Surge Arrester
|Standard||DIN,ISO, Non-Standard or according to customers’requirement|
|Applications||Power Hardware, Cable Hardware,High Voltage Test etc|
|Packing details||International standard package such as carton wooden or according
to your requirements|
|Delivery time||According to the quantity of products but will as soon as possible|
L/C, T/T, Western Union
30% TT before the produce, 70% before the shipment
|Place of Origin||Jiangsu,China|
Name: 500kv Corona Ring
- Material of 500KV corona ring for overhead line hardware: Aluminum
- Other material made form forged steel, die-casting aluminum is also
available in our factory
- Applicant for 500KV corona ring: 500KV polymer insulator.
- Tube Thickness of 500KV corona ring for overhead line hardware: 3mm
- Matched with two sets of M8 stainless steel screw and nut
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.
1. Customers' special need is welcome, from mold to samples within
2. Over 8 years' exporting experience, all inquiries responded
within 12 hours.
3. Exported to over 20 countries, products test reports provided on
4. ISO, SGS Certificated, product quality strictly controlled by QC
5. No MOQ limit, Timely delivery, High quality and competitive
6. Our Creed: Better because of Specialization.
If any inquiry about corona ring pls contact us freely.
Corona Ring Material
Aluminum, steel and copper are main material for Corona Ring and
The corona ring packing can be done by wooden case and cartons.
1). Wooden Packing:
Wooden packing suitable for heavy weight corona rings. For export,
Fumigation Certificate will be necessary when case is made of solid
1.No bark allowed on wooden package.
2.Ship fumigated wooden package as soon as possible, ensure
separate storage and segregation with non-fumigated wooden
3.Validity of the certificate of fumigation is 21 days.
Inquire local ship agency whether fumigation is necessary every
time after learning the lot package material, booking with a
certain answer. Method of wood case fumigation include chemical
preparation method and heat treatment.
2). Carton Packing:
Carton Packing always light weight and convenient for moving by
hands. Its suitable for light weight rings.