jjlamshushushu 发表于 2014-3-13 17:11

UL5085的感应测试

DIELECTRIC VOLTAGE WITHSTAND TEST - INDUCED POTENTIAL
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.
问题是:次级也需要做这个测试吗?

madeinnp 发表于 2014-3-13 18:20

本帖最后由 madeinnp 于 2014-3-14 10:31 编辑

应该是不用。
part1 clause25.1 中提到这个测试是"betweenthe terminal to one winding"这个应该是只要测一个绕组就好了吧。
而且,这个测试是空载测试,任意一个绕组上施加电压,其他绕组都能感应到相应的电压,所以从理论上来说,任意绕组施加电压,对变压器的考量都能起到相同的效果。

jjlamshushushu 发表于 2014-3-13 22:10

本帖最后由 jjlamshushushu 于 2014-3-13 22:11 编辑

madeinnp 发表于 2014-3-13 18:20 http://bbs.angui.org/static/image/common/back.gif
应该是不用。
part1 clause25.1 中提到这个测试是"betweenthe terminal so one winding"这个应该是只要测 ...

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 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.

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?

madeinnp 发表于 2014-3-14 10:30

jjlamshushushu 发表于 2014-3-13 22:10 static/image/common/back.gif
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 wi ...

Part2 和 part 3 不是都说按照part1 来做么?
7200c 应该是只电压周期吧,400Hz 就应该是7200/400=18s。

jjlamshushushu 发表于 2014-3-14 10:35

madeinnp 发表于 2014-3-13 16:30 static/image/common/back.gif
Part2 和 part 3 不是都说按照part1 来做么?
7200c 应该是只电压周期吧,400Hz 就应该是7200/400=18s。 ...

为啥刚好是7200C ?

madeinnp 发表于 2014-3-14 15:46

jjlamshushushu 发表于 2014-3-14 10:35 static/image/common/back.gif
为啥刚好是7200C ?

这些数值很多都是UL定的,会根据很多方面来考虑。
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