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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
3 q7 `4 ~1 L0 S' ^而IEC60884和VDE0620关于耐压实验是:! ]1 i% {! u; C$ P W
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。
. ^$ x3 ^- {4 a9 Z注2:在输出电流小于100mA时,过电流继电器不得工作。 ) J( {0 Z0 x5 ]# J" a2 W
60065标准中也有这么讲:, d4 `& S @$ n; ?/ y0 {7 T/ U! S
8 Z# M, U% d* W0 |( i The test voltages shall be obtained from a suitable source so designed that, when the output, I" b* M j) K" `* ]" G0 z/ d6 m
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
4 J; y/ M! Q; ~the output current is at least 200 mA.
6 {- @* ]- e/ q2 ^7 u An over-current device shall not trip when the output current is less than 100 mA.
, T; }7 i) Z5 c+ L, J Care shall be taken that the value of the test voltage applied is measured within ±3 %.$ x3 {; r& a6 X) O7 H$ M
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
: P( ~5 F6 K+ l7 f6 i% ?2 lthe full value which is held for 1 min. |
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