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引用第3楼someone于2009-06-03 16:02发表的 :# D, n! k0 ^& u
未必是所有的家电用开关电源内的隔离电容都需要两个Y电容串联。" C: y7 w' z6 J8 G" B$ a( L
; z6 l) `4 P- L4 n5 s0 y按照60335-1的22.42条的要求:0 O. e6 z; ~2 d9 G4 i8 b1 o
22.42 Protective impedance shall consist of at least two separate components whose
1 M: H4 `: M: r; V! w2 T* V, {impedance is unlikely to change significantly during the lifetime of the appliance. If any one of
8 y. w' `/ P* P6 [' s6 g....... 请先弄清protective impedance的含义。
& V, O3 j0 g7 m# k" a' H2 q根据定义,有protective impedance的电路应是accessible的。 |
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