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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
: r) {8 f1 j7 r而IEC60884和VDE0620关于耐压实验是:& @5 a' E* X& k2 p3 a
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。" ?) i" O: K- f( c+ X7 l- \
注2:在输出电流小于100mA时,过电流继电器不得工作。 / x' x2 X( w) c; i2 b; i
60065标准中也有这么讲:
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6 `3 Z! [, h3 A# ] The test voltages shall be obtained from a suitable source so designed that, when the output1 T0 X3 T1 x, R5 {2 [, U
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
c7 F; ]$ |. O1 G& N$ Hthe output current is at least 200 mA./ n/ Y9 W1 _" u- b- H
An over-current device shall not trip when the output current is less than 100 mA.
8 F- \( `7 A2 r0 C) q Care shall be taken that the value of the test voltage applied is measured within ±3 %.
) P! L" w" n+ t! d* {6 N Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to8 \$ {' f& m$ q" e
the full value which is held for 1 min. |
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