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引用第3楼someone于2009-06-03 16:02发表的 :& A+ s: x% r1 W" b/ B/ E
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。
: t3 U; Z+ @8 p% {2 [5 {, ?1 M! ]7 \3 g9 c, X# t$ p2 }
按照60335-1的22.42条的要求:4 _! M- c1 X0 c% T' s
22.42 Protective impedance shall consist of at least two separate components whose$ D9 R4 E9 F% u/ I7 s' U
impedance is unlikely to change significantly during the lifetime of the appliance. If any one of
% t& V6 p U8 }. Q$ Z/ [" W/ b....... 请先弄清protective impedance的含义。
+ n2 Q% [8 y& p* ]6 z0 q根据定义,有protective impedance的电路应是accessible的。 |
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