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引用第3楼someone于2009-06-03 16:02发表的 :
. [9 F5 x2 G$ x, h3 x3 _/ s, h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。
" U- q" S; [1 w+ `* g
' z, _2 v& v* v3 d9 }按照60335-1的22.42条的要求:
n' V; H* p# M/ y1 N* i22.42 Protective impedance shall consist of at least two separate components whose+ e" ^5 w* X' c2 p' a* X9 R
impedance is unlikely to change significantly during the lifetime of the appliance. If any one of
9 H: h$ }$ D5 V% o' I: h....... 请先弄清protective impedance的含义。
) j% _( z8 [+ `- C根据定义,有protective impedance的电路应是accessible的。 |
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