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引用第21楼nw-interfans于2009-12-28 21:18发表的 :: K" P. N0 W8 j: _
而IEC60884和VDE0620关于耐压实验是:
6 q. P# m' @& {, G1: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。- _! W+ n, Q) W4 Y6 N
注2:在输出电流小于100mA时,过电流继电器不得工作。 ' P+ J6 e" n6 T6 @; @* p2 r$ _
60065标准中也有这么讲:- |9 A6 |/ m6 g' A' r% B: D8 ~# x
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The test voltages shall be obtained from a suitable source so designed that, when the output
* M9 u0 s7 r( {& STERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
+ s: M1 f* G6 k5 zthe output current is at least 200 mA.
# m2 l7 N. R6 d An over-current device shall not trip when the output current is less than 100 mA.
" b) j) x! i8 H Care shall be taken that the value of the test voltage applied is measured within ±3 %.# O( I1 T! x: p1 ?: n
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to- W& e/ M8 [' l/ \7 n
the full value which is held for 1 min. |
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