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引用第3楼someone于2009-06-03 16:02发表的 :
5 y. D6 ]* S* e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。
$ ]$ J# C, K% F- {* o k1 |/ v! ~ a" `1 U. N4 D- I
按照60335-1的22.42条的要求:
. C3 ?( |* ]. l# ~! O' e3 k+ H" ^22.42 Protective impedance shall consist of at least two separate components whose- V/ t5 Q/ `& d- Z: {
impedance is unlikely to change significantly during the lifetime of the appliance. If any one of, M2 c* W" E- K5 @1 y. K
....... 请先弄清protective impedance的含义。
) u' R# R6 {1 R+ a根据定义,有protective impedance的电路应是accessible的。 |
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