|
引用第3楼aha0827于2011-04-15 13:47发表的 :. r* y; l8 \# v8 H4 K+ @
! E- K& N5 w2 k/ q5 X3 P0 N
; l J! X6 ?9 N6 L2 S, T5 a
UL1031是哪个版本,我使用的第5版(2009)没有该条款耶!
1 |, N7 F: T2 o# N在UL60950-1中插孔极性标识是通过以下来规定的吗?
& z8 S5 A' K* M6 \8 e/ Q----Symbo for nature of supply , for d.c. only
0 g: u7 Y; p E- n% ]
! \+ p5 a( k( t) S6 B* [# CUL60950-1 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 + j3 E/ T8 h- ^- W1 |
8 a2 N- ^5 B, O) A2 i2 D1 r1.the following information may be provided: c)rated output frequency or frequency range or symbol for d.c& K) O, M# r% |
; B5 d0 a% B7 E0 D! O/ M
*************************************************************************************************
$ K2 O; H, |& V( tUL1310 我刚才看到是2001年的,第五版在clause 51.6( t" ~* W) x+ D5 }* |- _: @
3 q; m: o- J# c, O6 E) s% R" j8 @
The polarity of a direct-current output shall be plainly marked, unless the unit is provided with a
9 P+ P; ~" [8 L' J" h' s, npolarized termination. |
|