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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑 # w- W/ z @$ X% r; a
head0819 发表于 2014-1-6 11:03 0 R% |6 Y6 Z' q( a, x# }: E
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 ... 8 S# |7 A8 n( d+ n4 O* l
1 I |6 V [8 F) m, Etable 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?" X$ _ D/ V! x3 j
对表9中这段话如何理解?--- If the maximum available secondary winding current of ; ^, Q: z: l5 Y- ?& A. c
a transformer is considered to comply with the maximum allowable# b/ X% `) }( V; `
current limitation and it is impractical to obtain the one minute current value for this test, 3 Q; Z- ]8 v4 w; q! q
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A, / u' s7 f4 `4 R' F
may be used to determine the overload test conditions.6 a9 G2 o* @ N! I
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; |' g& P1 B7 w- m! _
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?8 |1 z% b0 k. t# \. r+ z3 Y
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