Talk:Corona ring

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Capacitance of insulators?[edit]

I found the term "increase the capacitance of the insulators" (referring to antenna element isolators, I presume) somewhat misleading, and thought "increase the parasitic capacitance of the antenna" may be more appropriate. Although the insulators have dielectrics constant/permittivity and therefore contribute to the overall capacitance, the capacitance exists primarily between the metallic components of the antenna, ie. the elements, supporting structures etc.

Corona rings for 500KV[edit]

What material are they made of? How expensive are they? — Preceding unsigned comment added by 72.225.152.28 (talk) 01:36, 26 September 2011 (UTC)[reply]

What Material Are They Made Of?

What are the materials of corona rings? It depends on corona rings design and manufacturing process.

The custom corona rings are usually made from aluminium 6061 or 6063 thin wall tubing or pipe that is formed and welded; with appropriate supporting brackets and other mounting standards.

In some conditions, the stainless steel materials will be used.

Aluminium Alloy:

Aluminum alloy is a popular metal material to use for corona rings production.

Because it is both cost effective and high weather resistance.

The soft hardness is easily processing and polishing.

Die casting rings materials are usually A380 and ZL101.

ZL101 die casting aluminum alloy can be strengthened by heat treatment, which has natural aging ability, high strength and good plasticity.

ZL101 die casting aluminum alloy has excellent casting properties, good fluidity, small linear shrinkage, low thermal cracking tendency and high air tightness. But it has a slight tendency to produce porosity and shrinkage.

This alloy has high corrosion resistance, good weldability and general machinability.

A380 type die casting aluminum alloy is the most common special aluminum alloy because it integrates the characteristics of easy casting, easy machining, and good heat conduction.

It has strong mobility, pressure bearing, and high temperature resistance.

Although the A380 type alloy has always been considered convenient for machining, it is slightly rough due to its higher silicon content.

It is widely used in various products, including chassis of electrical equipment, engine brackets, gearboxes, furniture, generators and hand tools, etc.

Of course, it is also the material of the aluminum die casting corona ring.

Stainless Steel:

Stainless steel is the kind of material which is not easy rust, acid resistance and corrosion resistance, so it is widely used in light industry and heavy industry.

Sometimes end users need some special corona rings made of stainless steel for outdoor applications.

How Expensive Are They?

In the current economic environment, more and more companies are looking for ways to reduce costs.

In all areas of the company, if you can find better options, you can reduce costs. The same applies to the purchase of goods. Many companies are hoping to find the best source of goods in China.

Although the cost is lower than the local production cost, some buyers worry that they will encounter quality issues when purchasing goods from Chinese factories.

In fact, if you work with professional suppliers in China, there is no need to worry about quality issues.

This guide will tell you how to get the best corona ring price from China manufacturers.

Step 1: Compare the corona ring price from different suppliers

As we all know that China has a huge manufacturing base, which means you can compare the prices of your product from many different suppliers, so you can choose the best price for you.

Step 2: Negotiate with manufacturers to get a better corona ring price

When you find a good supplier and want to buy their corona ring product, you can negotiate with them to get a better price.

Step 3: Get corona ring samples

After you find some potential suppliers, ask them for free corona rings samples. When you receive the samples, check their quality, and ask your customers or partners to check them as well. If everything is OK, then negotiate with the suppliers about the good price and other details.

If you are a buyer, the best way to choose the professional corona rings manufacturers is to compare and choose two or three suppliers then communicate with them firstly by mail, telephone or Skype. This is an important step because it can help you reduce the risk of being cheated. If you find them trustful, then you can visit their factory in China. Weijia Don (talk) 00:43, 16 June 2022 (UTC)[reply]

Selfmade Pictures of Overhead Power Line Corona Discharge[edit]

I have pictures of corona discharge on corona ring of 500 kV overhead power line, if appropriate, they can be placed in the article.

Nitromethane (talk) 23:53, 19 July 2013 (UTC)[reply]

Those are beautiful! They are a perfect illustration of corona on electric power transmission lines, (although it is interesting that they are occurring on a corona ring which is supposed to stop corona). There are very few pictures of corona on WP. These belong in the article Corona discharge as well. May I ask how you took them? --Chetvorno^TALK 15:24, 20 July 2013 (UTC)[reply]

The picture was taken at night by the Sony SLT-A37 camera on tripod, Sony DT 55-200/4-5.6 SAM lens @ 200mm/5.6, 90 seconds exposure via shutter release timer/intervalometer, ISO 200. Actually corona discharge looks a little weaker to the naked eye, but long exposure of camera does the job. Nitromethane (talk) 21:24, 27 July 2013 (UTC)[reply]