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你参考电压是交流的话,这肯定是交流。但是你参考电压为直流的话,打交流会严格一点,但是打直流也没错,9706第二版没具体要求。作者: 1345141993 时间: 2012-12-17 21:01
改用DC的可操作性值得思考,出厂检测打直流太危险了,看能否改设计吧!作者: silvermin 时间: 2013-1-7 13:46
各位老师说的很对,我摘录出三版8.8.3的正文以及基本原理,希望对楼主有所帮助,谢谢。 ( X. W% d$ |7 J2 a" Q; b# ^' q2 i6 J& E: M; U- D6 ~
8.8.3a) 8 f$ q/ K- A! J! DAlternatively, a d.c. test voltage equal to the peak value of the a.c. test voltage may be# y$ i" a, I6 C
used.5 h5 J- K1 K+ v( u
( p: l( ^. X, m4 F: \, D0 _Subclause 8.8.3 a) % o/ {3 |: Z$ Z+ J9 BThe test voltage can be provided by a transformer, by a d.c. power source or by using the! g7 p s' P, k8 r
transformer(s) of the ME EQUIPMENT. In the last case, to prevent overheating, the test voltage " i; x9 l& p# T+ j6 lcan have a frequency that is higher than the RATED frequency of the ME EQUIPMENT.