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本帖最后由 清水白菜 于 2013-3-7 11:23 编辑 1 {3 q- h' l7 E! A! X. O
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提供个IEC 60065里的要求供参考: 初级保险丝小于6A的,保险丝后面的绝缘可不考虑, 大于6A的(考量为DIRECTLY CONNECTED TO THE MAINS),保险丝之后及整流桥之前都必须满足基本绝缘。; [7 ^1 X- ?; }+ { \& ]3 J) R
2.4.3
/ T$ i) C$ d6 [DIRECTLY CONNECTED TO THE MAINS
0 x. R0 {. ^& N& [1 Jelectrical connection with the MAINS in such a way that a connection to either pole of the MAINS8 _2 F5 V* f2 x2 v
causes in that connection a permanent current equal to or greater than 9 A, protective devices
, Y% \& W; q. T# x* B# Bin the apparatus being not short-circuited6 n0 B% W5 a3 V, o8 q, Q
NOTE A current of 9 A is chosen as the minimum breaking current of a 6 A fuse. |
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