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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
" N& ]" \4 s+ p/ w. lhead0819 发表于 2014-1-6 11:03
" H5 l/ x, H2 g8 Z. z, _" k28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 ... 2 L& y" | X9 Q7 R! f1 M( M. X
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table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
% |* U9 Z1 z4 x/ r0 a% r. M+ B, Q对表9中这段话如何理解?--- If the maximum available secondary winding current of
9 C7 Y& o1 i1 da transformer is considered to comply with the maximum allowable
+ V$ I, P. _0 B" `; |+ _7 Y% Vcurrent limitation and it is impractical to obtain the one minute current value for this test, + o$ e# U. G2 h6 j
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A,
: c* c* E' v! amay be used to determine the overload test conditions.
" `6 A) {) e1 a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
1 n& r' e: S# N. J @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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