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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
5 k* I2 j3 S$ `2 I: K, Q而IEC60884和VDE0620关于耐压实验是:- T- A$ l9 z4 m3 u2 q( H/ a4 S
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。
+ E' V9 x" S8 g& z7 K) I0 R注2:在输出电流小于100mA时,过电流继电器不得工作。 - n! n7 F$ P, A9 V1 e* u6 ]4 z
60065标准中也有这么讲:
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8 b0 u i) [4 ~' h3 h2 V. Q The test voltages shall be obtained from a suitable source so designed that, when the output
1 m6 q& Q* B6 v6 P! ?& F8 iTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,; u+ w! t! k1 C3 H( Q- x
the output current is at least 200 mA., k" m2 L2 `: e; o7 i l
An over-current device shall not trip when the output current is less than 100 mA.
& W" G7 M" Y1 }* X Care shall be taken that the value of the test voltage applied is measured within ±3 %.
0 N% S" @0 O) f. j* i Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to0 Q8 Y, e3 g* Z! U
the full value which is held for 1 min. |
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