|
引用第3楼aha0827于2011-04-15 13:47发表的 :
- X# |" M1 K/ y7 Y9 B) ~: Y* }" o" R7 v9 d, q/ U
$ Z5 D0 U) l0 V B
UL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
" @0 c. \& u6 M在UL60950-1中插孔极性标识是通过以下来规定的吗?! _: X4 ]( ` T t) P5 y' ~. u
----Symbo for nature of supply , for d.c. only
c8 x. h4 g Q- @# X. l% Z$ W6 E* Q% `8 m
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
: ]5 i" ]0 [: c
& Q1 s' P" G2 X0 Q2 [& u3 M: h* i1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c! L: q4 q. K p# k- Z0 U) g
2 c8 C' B" n" W*************************************************************************************************& U, P1 k1 A& x3 ~6 y
UL1310 我刚才看到是2001年的,第五版在clause 51.6
/ u! u/ w& B8 V7 @) Z3 p- x8 ^/ H) p! O5 c8 r! T7 ^7 _
The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a- P9 |, r! s0 L7 O# l) O' B
polarized termination. |
|