|
|
引用第21楼nw-interfans于2009-12-28 21:18发表的 :
/ a# b1 Y0 e( x( O而IEC60884和VDE0620关于耐压实验是:* i( T) H$ w% L- \4 {1 E! F
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. ]" T) N1 B0 ~9 N6 D+ G" l% q
注2:在输出电流小于100mA时,过电流继电器不得工作。
; U' [% z1 | A B' n! \60065标准中也有这么讲:& w3 O- W* l0 h: Z( k
1 A$ h* e+ f# h& j! y The test voltages shall be obtained from a suitable source so designed that, when the output
' B6 G* z5 t& L9 B+ w: TTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
1 V8 ^; a7 `% |# s( pthe output current is at least 200 mA.
$ l( `. y2 Q0 E- n+ r+ b8 W9 K& T An over-current device shall not trip when the output current is less than 100 mA.
6 r `" L3 ~' j i. P, y( ] Care shall be taken that the value of the test voltage applied is measured within ±3 %." i; p. ?; K& J2 E
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
6 R" l' e6 D' H) _4 P/ wthe full value which is held for 1 min. |
|