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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
% y! z' X) S, H( f* F; s" s. H而IEC60884和VDE0620关于耐压实验是:9 V0 B6 L4 {1 U' A4 |8 U* m
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。4 O0 }# ?# u( L7 b# c" ?
注2:在输出电流小于100mA时,过电流继电器不得工作。
. n, N W9 w' _( l% D% a60065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' H% e( @2 x4 b/ W( V; }
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,7 d! S4 h( u) C# P5 T/ `
the output current is at least 200 mA.
4 C% Y! W D$ s3 Y An over-current device shall not trip when the output current is less than 100 mA.3 L6 a& O4 c# A7 O$ q
Care shall be taken that the value of the test voltage applied is measured within ±3 %." e1 b S5 u& s3 G
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to* g: b) _9 x8 _. x# {3 k: F3 L6 ?
the full value which is held for 1 min. |
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