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引用第21楼nw-interfans于2009-12-28 21:18发表的 :* ~* Q0 w5 d! O5 w
而IEC60884和VDE0620关于耐压实验是:' N* Q2 W6 X s4 S9 D& ?' p1 s
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。0 V8 W0 C, p* Z' C }$ ]
注2:在输出电流小于100mA时,过电流继电器不得工作。
% m3 i4 T/ O/ V/ H) s9 ^60065标准中也有这么讲:/ @# S7 W9 {" R" p4 j
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The test voltages shall be obtained from a suitable source so designed that, when the output9 L6 Y3 W' S( @
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
/ `/ M U5 k' gthe output current is at least 200 mA." g& N6 U' P1 g m$ H3 M
An over-current device shall not trip when the output current is less than 100 mA.
( S+ D( M! K$ r6 K/ ]5 E3 D Care shall be taken that the value of the test voltage applied is measured within ±3 %." {! y2 l6 q* ]$ P5 t: P, o
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to5 ^7 ?3 b4 K- ]% d; D- ?3 w; u: U6 p. Y
the full value which is held for 1 min. |
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