|
引用第3楼aha0827于2011-04-15 13:47发表的 :
9 O) l1 ~# V& X5 R& c2 A% s. r. E( d; q' W
) t1 J% N1 p+ }" z0 V) CUL1031是哪个版本,我使用的第5版(2009)没有该条款耶!1 i- b$ p5 b ^; q0 ]
在UL60950-1中插孔极性标识是通过以下来规定的吗?
q/ k; h" Q9 v; g; A# i8 F$ N----Symbo for nature of supply , for d.c. only
+ p5 t' S: p+ b6 V& {) V U4 ~- L
# k4 Y% o& d( L# ] |: u7 fUL60950-1 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
* y L C# h. Q+ x5 n- T+ N! ^# O0 S& i6 u$ V
1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c8 x; ]8 Z6 H! l, q
* P2 i, z4 y: i9 X
*************************************************************************************************
; v5 w1 q) k- `( P: d; O: jUL1310 我刚才看到是2001年的,第五版在clause 51.6
* E. X( Q+ J2 h4 O+ p7 e2 a* i! D* s! } v5 h3 q! t
The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
1 q2 o. f, A* c1 P3 x7 cpolarized termination. |
|