The differences between corona rings and grading rings are extremely subtle when viewing from the back.
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Both rings are made of aluminum alloy or hot dip galvanized steel.
The corona rings are used in high voltage test equipment and power systems, which is mainly made of aluminum alloy.
A grading ring, it is similar with corona ring, which is also used on high voltage equipment. But they encircle insulators rather than conductors.
Corona rings and grading rings are common parts in power transmission line and high voltage industry. They are easy to operate, convenient to move, and fast to install.
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Today we’re going to go over 6 differences between corona rings and grading rings. This should help all you newbies out there who don’t know the difference. So let’s get into it, shall we?
If you’ve ever wondered about the differences between grading rings and corona rings for high voltage industry, read this guide.
A grading ring is used to ensure a uniform voltage distribution along the length of an electrical device. This is important for surge arresters so each MOV disc in the arrester is energized at the appropriate voltage.A corona ring is traditionally used to electrically shield external hardware to prevent corona from developing. This corona could lead to degradation of insulating materials or create interference to electronic communication.Surge arresters below 500 kV system voltage do not typically need corona rings.
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