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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
/ b; ?" R' ]2 Y( j% L! D2 |% zhead0819 发表于 2014-1-6 11:03
& t" z Y$ ]# ]5 n3 D( ]( i. a/ h% e* p28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 ... 2 X* X$ t9 `! c. S. L( _6 c
7 S) C: G& r$ a5 H" |2 \# I
table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
, C4 m5 ~+ u" w% M/ n/ I; Z: D对表9中这段话如何理解?--- If the maximum available secondary winding current of * m. y+ ~4 O3 b1 h; f3 {! @
a transformer is considered to comply with the maximum allowable
' G- c6 d" y; E! V+ k Ecurrent limitation and it is impractical to obtain the one minute current value for this test,
' r4 l5 g v. bthe maximum measured secondarycurrent value at the time of coil burnout, or 8 A, * k7 e% d0 r, P% D# D7 r0 y% ]$ w, X
may be used to determine the overload test conditions.
& d! P) n' h% M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) n7 R* q* q$ S% A* ~4 |; u
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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