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引用第3楼aha0827于2011-04-15 13:47发表的 :- c3 m2 W# \' J- d
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# M: h+ f1 S x- d6 K( QUL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
i. q7 m Y$ H3 p* a! O在UL60950-1中插孔极性标识是通过以下来规定的吗?
4 ?* ^) x' S8 y+ N: R+ S----Symbo for nature of supply , for d.c. only
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5 l5 p" H! D% yUL60950-1 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
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1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c4 \7 o0 {1 `$ k2 X( h( y1 C
- |# K% ~' F! e6 M+ w3 J*************************************************************************************************
# _4 m/ T) y ?1 HUL1310 我刚才看到是2001年的,第五版在clause 51.6, q# Q9 p2 k4 M: L1 i! |( P
0 [( @5 w1 c1 o" xThe polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
4 J# B" L7 C9 J& A2 Kpolarized termination. |
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