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引用第3楼aha0827于2011-04-15 13:47发表的 :
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* ^* ] F; V1 ^& N3 ]( r! NUL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
- n: g B) F V+ }+ E; E) C% M在UL60950-1中插孔极性标识是通过以下来规定的吗?
2 A& r" a, a9 J$ `, O----Symbo for nature of supply , for d.c. only - T; L" K- X9 ~( P
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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
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1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c% V. w" g2 y A
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1 `; w: Q E* r( m" Y+ zUL1310 我刚才看到是2001年的,第五版在clause 51.6
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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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