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引用第21楼nw-interfans于2009-12-28 21:18发表的 :! M$ Q3 Q% c; D* @- @& F
而IEC60884和VDE0620关于耐压实验是:% P, Q' I( g' Q) Q C6 y z
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。
( e7 _9 j2 O- L注2:在输出电流小于100mA时,过电流继电器不得工作。
" p- C+ }( d; l* U/ o, H60065标准中也有这么讲:" s8 @5 t- Y p" I
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The test voltages shall be obtained from a suitable source so designed that, when the output
4 K3 G; N2 f: Q9 A& o* D9 XTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
5 q" x( u) j/ R, a) C/ Uthe output current is at least 200 mA." |* c7 ]9 S ^' O8 _4 B8 `1 _
An over-current device shall not trip when the output current is less than 100 mA.
?- z, h+ L6 Z* u5 m* ~* V Care shall be taken that the value of the test voltage applied is measured within ±3 %.1 ~7 l9 x6 t3 d, a( [* H
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to7 D+ h% }" ^8 ^% C B2 e
the full value which is held for 1 min. |
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