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发表于 2014-3-13 22:10
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本帖最后由 jjlamshushushu 于 2014-3-13 22:11 编辑 ) |" n. B. t8 }5 j5 c! U9 f
madeinnp 发表于 2014-3-13 18:20 
/ g, C4 y( k& F( J0 l; G. o7 C应该是不用。
1 H- ]7 U) e3 ]1 {- {part1 clause25.1 中提到这个测试是"between the terminal so one winding"这个应该是只要测 ... 7 a) M) f4 ?5 P, y
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这个测试项目的频率为400HZ,这是5085-2里的,而5085-3里的这项测试的要求是 the dielectric voltage withstand test after rated output heating test, twice the rated voltage was applied to the transformer's winding with the remaining [winding] open circuited. The frequency of the applied voltage potential was not less than twice the rated frequency and was maintained for a period of 7200 c.
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9 Z! i q; b8 n/ O- J5 E6 y问题来了----为什么二者同一个测试项目区别这么大呢?7200C的含义是什么? |
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