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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
9 s' Y) k7 q! C6 S+ @9 d8 Q, l9 A. T4 {head0819 发表于 2014-1-6 11:03
1 ^0 g' Z( E/ j A* w) q28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 ... 1 l: B- e! y. Q' K
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table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?+ T7 q, t6 D/ W' `0 c" w% s' j
对表9中这段话如何理解?--- If the maximum available secondary winding current of $ K+ w: t' Y- _ R, ~" a9 L
a transformer is considered to comply with the maximum allowable: B* R& D+ W7 Y1 ] `9 ^3 P. G! l
current limitation and it is impractical to obtain the one minute current value for this test, ' ` _4 c8 Y6 d; F$ C% {" [& M: n
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A, * b* B! B( `8 S
may be used to determine the overload test conditions.
6 M1 P* X$ O f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 max
% D! I+ H! Q* ^4 a+ Y0 }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?
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