Corona discharge. Some questions.

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NV64

Joined Feb 15, 2019
38
Hi. I would like to know the answers to some questions:
1) Above what voltage can the formation of a corona discharge for DC?
2) Above what voltage can the formation of a corona discharge for AC frequency of 50 Hz?
3) Does corona discharge mainly occur on uninsulated conductors? (Translation provided by moderator)
 
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