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DIELECTRIC VOLTAGE WITHSTAND TEST - INDUCED POTENTIAL4 s: D$ S3 F' s* R/ K2 r
METHOD----Following the Applied Potential tests, the [primary] [secondary] winding of each transformer was subjected to an alternating potential of twice the [primary] [secondary] voltage rating as tabulated below. During these tests, the [primary] [secondary] windings were open. The frequency of the applied voltage was 400 Hz and was maintained for a period of 18 s., D$ N4 T, v, r) a) O
问题是:次级也需要做这个测试吗?2 J8 Z7 Z) ?6 y! j+ O( t1 L; q
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