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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑 5 c5 r6 N# q& n. w% J
head0819 发表于 2014-1-6 11:03 2 }5 U) t& w G, d5 J* s, @
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 ... - L- J5 X5 R" x
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table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
+ ~) z$ j5 J8 [- K, w# x3 x对表9中这段话如何理解?--- If the maximum available secondary winding current of # X! f: M$ h; X3 d* }4 {; _" m
a transformer is considered to comply with the maximum allowable
* m3 q F9 N L1 i2 Icurrent limitation and it is impractical to obtain the one minute current value for this test,
N# q* {$ y& M0 Jthe maximum measured secondarycurrent value at the time of coil burnout, or 8 A, # l) t, A. Y' D1 {. Y
may be used to determine the overload test conditions.
) F j- ]/ r, v4 i( |# R |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
: O- M, U3 H5 E5 ?$ m+ E0 ]$ C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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