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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑 ( ~6 J4 _5 T2 Y
head0819 发表于 2014-1-6 11:03 6 k* B1 N* A% V, B A
28章节短路一分钟记下的是最大输出电流,33章节是变压器过载的测试。 过载测试先从condition A开始, condi ... ! k, G( R6 l5 I
1 @ B6 b% _2 U+ A3 Q5 z, ^
table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
# [3 n# s" q1 n" r, o对表9中这段话如何理解?--- If the maximum available secondary winding current of % l" f8 F- w) o: H* V
a transformer is considered to comply with the maximum allowable8 ^- _% w5 r; `/ C: _% P
current limitation and it is impractical to obtain the one minute current value for this test, ; {9 g7 j' a6 i, Q- x
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A, - W% }: {! X& S+ F& ~
may be used to determine the overload test conditions.
" J0 b( k0 d* \9 k7 D% \也就是说按照条件A--I,每个条件阶段持续7小时,其实条件A的过载电流=I +(I max-I) X100%=I max4 B$ ~! H2 p" B: e* \. j$ z& N, l4 z
即:只考量I max 不大于限值8A就可以替代其他过载测试条件了。是这样理解吗?* @0 Q2 L. Y! _4 d# p& F
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