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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
' j" c/ `" {' G1 ?/ Vhead0819 发表于 2014-1-6 11:03 ; p- }1 u N3 d$ J# i
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 ...
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table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?$ O! j- f% H6 b
对表9中这段话如何理解?--- If the maximum available secondary winding current of
. I4 o+ }& M/ E7 e' ea transformer is considered to comply with the maximum allowable# h" L/ X$ M5 B
current limitation and it is impractical to obtain the one minute current value for this test, 6 J, q" o# G% y; p1 Z F
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A,
$ W! V5 s5 ?# Y+ {( U6 ^; ~may be used to determine the overload test conditions.1 j# m, j" }% N, ^
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 max2 U/ @/ t- O4 g0 N
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?# F4 G1 T ^4 L" ~; l: L$ q
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