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发表于 2014-1-6 11:19
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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑 * @- o: O$ o; d1 ?+ k' X: n& |
head0819 发表于 2014-1-6 11:03 
$ \+ Q3 a& b6 a& v28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 ...
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table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?; f4 T$ ?! h) | Q$ S. C
对表9中这段话如何理解?--- If the maximum available secondary winding current of ; ~0 V0 q" |4 |% U
a transformer is considered to comply with the maximum allowable
8 B/ ?( j6 U5 o& M, U/ U; Bcurrent limitation and it is impractical to obtain the one minute current value for this test,
; {& _( t, v. H+ P* G4 R& N2 h- xthe maximum measured secondarycurrent value at the time of coil burnout, or 8 A,
/ [( x+ s G2 k; ^9 Hmay be used to determine the overload test conditions.
* e. P( \! s7 e+ \& u1 F( n3 U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 max6 q6 B: I6 V5 ^9 ]. q- q% M' W
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?. r, o @) C! x" f# r' i2 K
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