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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
# v) z! V: E3 v2 bhead0819 发表于 2014-1-6 11:03 % d8 P% n0 x: r& L/ b3 J
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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1 j+ D- b0 P* atable 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?, ^+ ~ y( ]0 A) f+ n
对表9中这段话如何理解?--- If the maximum available secondary winding current of
: [* p( x, a8 [, j$ K. Ka transformer is considered to comply with the maximum allowable
' s9 S7 d* y$ d; U; _ Wcurrent limitation and it is impractical to obtain the one minute current value for this test, ]6 Y9 o$ u5 w! _: ~. R, c
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A,
7 s' J8 y2 ]& C; x0 z( [! d; umay be used to determine the overload test conditions.
2 b2 K" `. G4 {# Z( e9 X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, O- ?! [+ m4 {0 W2 L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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