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引用第21楼nw-interfans于2009-12-28 21:18发表的 :8 {# g! _6 R! \* |# Z4 C2 `# c
而IEC60884和VDE0620关于耐压实验是:* O: Z, E l# Z" u5 e' |
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。
: k3 v9 s) P( M. N( V0 B9 q注2:在输出电流小于100mA时,过电流继电器不得工作。
4 M+ S5 j) B- _; m60065标准中也有这么讲:8 _1 M9 |+ `9 X. m" U& o
( d, N! G1 [' g& c- b9 B) q The test voltages shall be obtained from a suitable source so designed that, when the output
& _6 J& U7 V0 u8 _6 K5 kTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,( z1 z2 N% l; d$ E/ {
the output current is at least 200 mA.0 b. K v } a d3 N4 _
An over-current device shall not trip when the output current is less than 100 mA.
7 l% p- n# @# A( v Care shall be taken that the value of the test voltage applied is measured within ±3 %.% K1 r& o9 K& t7 C; T+ Z1 K
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to: ^, A) B# z+ g) u3 v( D
the full value which is held for 1 min. |
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