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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
' {4 _( Y% s9 B而IEC60884和VDE0620关于耐压实验是:; j+ {% H) G, Y' i
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。* W9 K2 P- b: P! S' j
注2:在输出电流小于100mA时,过电流继电器不得工作。
; r& g0 P0 m8 T7 S8 T60065标准中也有这么讲:+ g! N; V& h X$ s0 g
% p3 U7 V. S6 e( q1 O$ u8 W+ c The test voltages shall be obtained from a suitable source so designed that, when the output
1 ^7 n1 [5 n4 ?7 {' ]1 YTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,6 S G9 c4 t8 z6 n/ O, O b$ \% E
the output current is at least 200 mA.0 [9 c( k2 O% h
An over-current device shall not trip when the output current is less than 100 mA.4 S% o( W1 s8 X" d
Care shall be taken that the value of the test voltage applied is measured within ±3 %. A( D6 a4 K, e5 ^7 u
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to3 ?4 E: R/ V. a1 h8 j" H
the full value which is held for 1 min. |
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