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引用第3楼aha0827于2011-04-15 13:47发表的 :+ N P N7 J/ d Q
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& v4 F. E( Y4 C4 f( ^% zUL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
3 b( Z8 O$ n4 K$ {在UL60950-1中插孔极性标识是通过以下来规定的吗?/ w8 u5 o3 p7 I, g% _" C3 d
----Symbo for nature of supply , for d.c. only
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UL60950-1 中是通过Symbo for nature of supply , for d.c. only规定的,而且还可以参考TableNAA.1(informative)1.7.1 . v. y, m; q- W" |( L+ v
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1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c
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7 D0 r9 c; v) `1 h9 W*************************************************************************************************
# @8 y) L- ^& M* a% g* v0 [UL1310 我刚才看到是2001年的,第五版在clause 51.6 P+ H6 d) {* _- j0 a0 L9 Y
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The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
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