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本帖最后由 jjlamshushushu 于 2014-3-13 22:11 编辑 3 b) j7 C0 m( R- R0 y
madeinnp 发表于 2014-3-13 18:20
$ E3 u" c3 q$ j6 k应该是不用。0 ]- y0 `& J. t7 [
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 ... * d/ W% [: e5 K5 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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5 W: j- p* |8 B% X, r) _8 S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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