A grading ring is an annular protective fitting used to improve the voltage distribution across an insulator string. As the name suggests, its primary function is to equalize voltage. It is suitable for AC (alternating current) voltage applications: by enabling the uniform distribution of high voltage around the object, it eliminates potential differences between various parts of the ring, thereby achieving the effect of voltage equalization.
Grading rings have a wide range of applications and are classified as a type of power fitting. They can be categorized based on application purpose and material as follows:
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Classification by application purpose:
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Arrester grading rings
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Lightning protection grading rings
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insulator grading rings
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Transformer grading rings
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High-voltage test equipment grading rings
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Power transmission and distribution line grading rings
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Classification by material:
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Aluminum grading rings
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Stainless steel grading rings
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Iron grading rings
Grading rings are mainly used for side lightning protection. During a thunderstorm, high-rise buildings may be struck not only on the roof but also on the sides—metal components in particular are at risk. Therefore, grading rings are designed for high-rise buildings to prevent side lightning strikes.
Post time:Sep-25-2020
