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引用第21楼nw-interfans于2009-12-28 21:18发表的 :) E, [+ z, q+ Y# L9 i2 F. x) _( H
而IEC60884和VDE0620关于耐压实验是:
9 e& b; {0 T, `* w6 `1: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。2 [7 ?/ Y2 G' q
注2:在输出电流小于100mA时,过电流继电器不得工作。 / ?5 p5 N% K5 T5 H6 ^7 t( P. T
60065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 output) n, R |; E( F' v5 S
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,& K r3 U4 d, T+ q
the output current is at least 200 mA.
# i$ m3 Y! A# `3 s& W4 c/ E, T An over-current device shall not trip when the output current is less than 100 mA.! i7 _3 ?6 T9 @8 s7 u# L8 \
Care shall be taken that the value of the test voltage applied is measured within ±3 %.
% [) {! y: A+ Z/ S( \ Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
9 X5 p; }: j4 U9 e7 J. }the full value which is held for 1 min. |
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