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引用第21楼nw-interfans于2009-12-28 21:18发表的 :' @8 B. n$ g5 b0 ?# ?( t: A3 G9 |
而IEC60884和VDE0620关于耐压实验是:
B, X5 {0 W" r+ A O1:试验所用高压变压器应设计成:当将输出电压调到相应的试验电压后使输出接线端短路时,输出电流至少为200mA。) h3 }( C6 y+ B' D( f# R& e
注2:在输出电流小于100mA时,过电流继电器不得工作。 , m& P8 `# v" j9 a9 y6 A
60065标准中也有这么讲:
% d0 p+ \ T2 m8 x. ]0 f* K# ]- h5 y
The test voltages shall be obtained from a suitable source so designed that, when the output
( d7 F4 V& c4 l$ f s, {6 yTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
4 k% k+ s- Y; k' J' Lthe output current is at least 200 mA.' F) ~0 f# o* x6 u. n
An over-current device shall not trip when the output current is less than 100 mA.
$ \7 d5 y* K% Q. S Care shall be taken that the value of the test voltage applied is measured within ±3 %.4 R9 C/ s2 w# y( N9 O- F( W E1 U& ?
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to& ?; X! \: S4 x @' L6 L& g
the full value which is held for 1 min. |
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