The type of relay fitting with the transformer is DD-11/60.
Because the cable protects the primary main insulation, so the insulation characteristics of secondary winding are only examined.
The secondary winding can be able to withstand the power frequency text voltage of 3kv to ground.
— A manufacturer specializes in middle-high voltage vacuum circuit breakers, from 7.2kv to 40.5kv
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—A professional team with over 20 years’ experience in electrical industry
—Type Test Report from the authoritative high-voltage laboratory
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