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引用第3楼someone于2009-06-03 16:02发表的 :# v k7 T/ P. `% t5 G' n- d( s3 Q2 m
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。
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( v$ d6 w! I6 b; L x% H0 v按照60335-1的22.42条的要求:) s3 k2 m: c/ i! ^3 H, g, c8 n+ e$ A$ J
22.42 Protective impedance shall consist of at least two separate components whose9 o8 Z; L: p) a( Y0 f) r# t5 B
impedance is unlikely to change significantly during the lifetime of the appliance. If any one of* j/ C: V( G# g' u; U( p
....... 请先弄清protective impedance的含义。* ^# P0 {3 @2 g! i' q
根据定义,有protective impedance的电路应是accessible的。 |
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