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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 8 `( o9 U u8 N* a. p
madeinnp 发表于 2014-3-13 18:20 ; P. j, x1 J/ ?$ X! f1 L1 K
应该是不用。
+ L5 L/ z1 _" g& Opart1 clause25.1 中提到这个测试是"between the terminal so one winding"这个应该是只要测 ...
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8 w5 h6 s# n! z0 r2 X% v; b1 x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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3 j* X, ?9 L: w/ I$ Q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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