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引用第3楼aha0827于2011-04-15 13:47发表的 :
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UL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
& G$ z2 P5 x4 b" R/ h! N0 @3 ~; F& D: Y在UL60950-1中插孔极性标识是通过以下来规定的吗?
* {* I! d3 |4 m) ]2 y----Symbo for nature of supply , for d.c. only
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9 h, H; c& T8 ?/ x/ wUL60950-1 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 0 E8 H6 J9 Z! t
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1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c& X; T6 x/ u7 W7 G: i! f' Z6 N
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UL1310 我刚才看到是2001年的,第五版在clause 51.6* H8 ~$ P8 w: m' Y1 X6 q: k7 B, F
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The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
* _4 _' @% A: M1 Q% }6 Bpolarized termination. |
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