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引用第3楼someone于2009-06-03 16:02发表的 :
X5 h! [5 Z$ i# l- K3 K3 B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。$ D6 X ]- v( D' a0 x
{3 z0 ~$ X" ^# w$ T2 N. y) C
按照60335-1的22.42条的要求:# S% }" c+ n6 i& o, @7 e
22.42 Protective impedance shall consist of at least two separate components whose
/ p3 p7 X+ q% o7 D9 u. uimpedance is unlikely to change significantly during the lifetime of the appliance. If any one of' Q# v! Z7 c" f/ h2 l, |
....... 请先弄清protective impedance的含义。9 Q/ \6 y' v; F$ }& ^: P$ B
根据定义,有protective impedance的电路应是accessible的。 |
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