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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
" y- e; H7 @4 C+ z而IEC60884和VDE0620关于耐压实验是:
* i5 w3 x* `; }; Z+ \8 E$ y1: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。
3 b, w& W& p' ~% b注2:在输出电流小于100mA时,过电流继电器不得工作。 ! V5 N7 s( v0 G4 J
60065标准中也有这么讲:% h+ `! g2 R" d8 W
2 p- y6 q" p! C) G3 ~ The test voltages shall be obtained from a suitable source so designed that, when the output2 L7 ~. M& j& _% D$ C2 S* y8 n
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
9 }5 }3 T* R! b5 Zthe output current is at least 200 mA.; x; r- z! ]$ i# B7 F
An over-current device shall not trip when the output current is less than 100 mA.
6 h- Z4 O' t% i! u& ?/ U% m2 t Care shall be taken that the value of the test voltage applied is measured within ±3 %.* C: ]) X' I- X0 L* z1 P0 v8 [
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to& t: Z2 i; o0 d) L
the full value which is held for 1 min. |
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