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引用第3楼someone于2009-06-03 16:02发表的 :
( h* z$ b( j5 _0 u+ a7 ~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 _* \, o" S0 i0 Q( R6 \% {$ c- B9 Y1 g
按照60335-1的22.42条的要求:
/ H- D2 B5 O0 g5 W, }22.42 Protective impedance shall consist of at least two separate components whose
+ s: ?) G5 `$ A7 zimpedance is unlikely to change significantly during the lifetime of the appliance. If any one of
% }% n7 ~0 f8 f) n( \/ R) d9 _....... 请先弄清protective impedance的含义。+ y+ [5 s2 x1 s! C# B
根据定义,有protective impedance的电路应是accessible的。 |
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