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DIELECTRIC VOLTAGE WITHSTAND TEST - INDUCED POTENTIAL0 n4 K! N% G, ]% Y5 W8 a; e, r i9 V
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.
; v, U0 W: E; V. h- |1 ^ A* P! w问题是:次级也需要做这个测试吗?
* P6 a0 t! `- c5 A 3 n5 Z6 j, a4 z2 `
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