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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。
# ]9 y- d5 o6 {0 G$ H1 F0 P! k) [8 G5 v: F2 {1 t
8.8.3a)' D5 [; y9 I8 B
Alternatively, a d.c. test voltage equal to the peak value of the a.c. test voltage may be3 F9 @( f& C" O; b7 ?/ [4 K
used.! f3 D# t8 h1 I1 J7 @5 {/ j1 [
& C4 j* }1 M& gSubclause 8.8.3 a)
( F' S; Z' {, v1 u hThe test voltage can be provided by a transformer, by a d.c. power source or by using the
# T' J- T6 ^2 I N7 W( P U! K7 ~transformer(s) of the ME EQUIPMENT. In the last case, to prevent overheating, the test voltage! z6 h- _* i$ a2 Z
can have a frequency that is higher than the RATED frequency of the ME EQUIPMENT. |
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发表于 2012-12-17 21:01
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