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The beginning of use composite insulators
- May 15, 2018 -

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At the beginning of the use of composite insulators, the power operation department was cautious about using composite insulators on transmission lines with voltage ratings of 500 kV. With particular emphasis on operational experience, it imported several batches of composite insulators from the United States, Germany, and other composite insulator manufacturers. The domestically produced 500 kV composite insulators are also linked to the network. After more than ten years of testing, the operation practice shows that the quality of domestic composite insulators is not inferior to that of imports.