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本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
: M; M2 R4 L! P! t9 A6 k* v& Chead0819 发表于 2014-1-6 11:03 2 c; M+ e& i9 g7 Q
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 \* m* l5 d4 Z7 d7 @8 atable 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作? E$ M6 v7 @2 D! q+ z& X9 Z/ J
对表9中这段话如何理解?--- If the maximum available secondary winding current of
7 v: Y6 J. M! Q: V& }a transformer is considered to comply with the maximum allowable
5 T! T3 Z" B/ F3 @current limitation and it is impractical to obtain the one minute current value for this test, 4 `' ~+ B7 |& B
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A,
9 _( V( J6 q. R* Y+ ymay be used to determine the overload test conditions.9 B: R) j/ S5 f5 {! S3 E9 W/ j4 _
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) @2 M3 U- s, e! ? S
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?" s, x' @! {5 P" o N5 L4 X( s
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