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引用第3楼someone于2009-06-03 16:02发表的 :8 c1 I$ G M p2 E3 c" C
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。; X2 \& \6 ]! J! o
" R9 ?: }6 n( R- v' n8 L5 U
按照60335-1的22.42条的要求:
5 e j7 j6 S v. J6 U" D22.42 Protective impedance shall consist of at least two separate components whose
/ _( p4 |& f7 E; X7 a, t7 qimpedance is unlikely to change significantly during the lifetime of the appliance. If any one of
# C6 V# q, G# B....... 请先弄清protective impedance的含义。
% Y$ e5 p5 T* c* o* R& T根据定义,有protective impedance的电路应是accessible的。 |
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