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发表于 2013-10-7 09:54
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Nezof 发表于 2013-10-7 09:39 0 G# H4 A: P$ F/ N
两个标准年份不一样,可能还没更新吧 9 r; V& T2 m8 y5 X6 P
60335-1 © IEC:2010 里面第36页有这么一句话,可以算答案吗?-----k is equal to
* m" @# ?1 Y0 A• 225 for aluminium windings and copper/aluminium windings with an aluminium content1 T c/ J0 j* |, z
≥ 85 %,
" d4 X* P. n9 N' g• 229,75 for copper/aluminium windings with an copper content > 15 % to < 85 %,
) ~6 j8 s6 l! Y( h9 {5 h• 234,5 for copper windings and copper/aluminium windings with an copper content
5 \$ w5 @" f- p) D≥ 85 %; |
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