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本帖最后由 jjlamshushushu 于 2014-3-13 22:11 编辑 * w0 R" a( t: I
madeinnp 发表于 2014-3-13 18:20
. I; M( f& I1 e+ @# @7 H应该是不用。; v/ v, M) U f, [9 ]; F, @! c- \
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 ... F+ q$ B1 W8 S& H4 J0 {; M: n
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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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) f) S9 L- U5 |. J; k& z7 v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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