|
|
引用第9楼anpup2010于2011-07-28 16:55发表的 :
5 N. J! \8 a+ O3 ~6 O7 E/ ?2 K正确认案件 4.6mm, 且现在所有的认证单位都接受这种算法(TUV, UL, NEMKE, ITS都接受的),并且从标准出发,也是有根据,是正确的。
# [" d: N+ A0 a5 X# X重点: 请不要忘记表格2K, “PEAK WORKING VOLTAGE a”, 在峰值电压有备注一个小“a”, 对应到这个表格下面的备注,就是“a If the PEAK WORKING VOLTAGE exceeds the peak value of the AC MAINS SUPPLY voltage, see 2.10.3.3 b) regarding additional CLEARANCES.
, Q) n' H$ F* Z, [$ [% `7 s
. g+ \7 z, O6 v4 v" E+ v& F7 n借上面兄弟的标准描述:
! C; [, K3 w( i, ~For an AC MAINS SUPPLY not exceeding 300 V r.m.s. (420 V peak):
* I( F1 V# V5 a5 m) o* h.......
, e* [ w- t* Kworking volatge Upeak is 612V,according to Table 2K, we should refer to 840V (6.4mm). why you choose 420V(4mm)? |
|