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引用第21楼nw-interfans于2009-12-28 21:18发表的 : A# P! T7 n3 e* L/ d" {
而IEC60884和VDE0620关于耐压实验是:
0 z9 l- {: {- 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。
" s% J0 G \3 @$ l0 _注2:在输出电流小于100mA时,过电流继电器不得工作。
' C4 p/ W- z( M' Z9 R! |2 X60065标准中也有这么讲:
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The test voltages shall be obtained from a suitable source so designed that, when the output1 s- } x2 |/ G
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,+ C: M" A: I1 H3 J: v' b
the output current is at least 200 mA./ D4 C1 u# J# x$ u2 |, O4 c$ x
An over-current device shall not trip when the output current is less than 100 mA.
$ d6 o7 g0 A' X3 n Care shall be taken that the value of the test voltage applied is measured within ±3 %.
# s/ M) ^% [" K0 Z* ]: c Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to V- \* l2 ?9 j! `- ~. P
the full value which is held for 1 min. |
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