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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
. y4 E W. T/ j% Mhead0819 发表于 2014-1-6 11:03
r6 ]6 r2 p7 t/ H' c28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 P$ g: A# ~3 c9 [% j9 Btable 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
9 g" N B! Z. Y C2 `* F- R* b对表9中这段话如何理解?--- If the maximum available secondary winding current of % K4 H" `, {( x* P! g, r/ o% }
a transformer is considered to comply with the maximum allowable# f: H: B7 \3 ?9 `) B, A/ s
current limitation and it is impractical to obtain the one minute current value for this test,
9 _1 g; D6 b4 H4 c9 m" _the maximum measured secondarycurrent value at the time of coil burnout, or 8 A, # `" Z$ w1 K0 l) w( t* @
may be used to determine the overload test conditions., @# J; G. r. 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 max2 h) t" X/ u% N5 t4 Z* P, G( {
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?9 u0 @! B8 o8 Q4 `8 X
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