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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
N' d) Z* u8 @; K& |" W- H而IEC60884和VDE0620关于耐压实验是:
2 j1 G- U0 x3 f; P w6 R4 z' ?. G+ u1: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。
8 W% ~- g; C) r) ^, D) G2 X注2:在输出电流小于100mA时,过电流继电器不得工作。 7 P* W# a5 D( ]/ A
60065标准中也有这么讲:
( Q9 T5 _/ a' X Q& y
3 M2 u. X+ G6 z+ i& S The test voltages shall be obtained from a suitable source so designed that, when the output
1 l" @8 J3 f4 M/ dTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
8 [- r! i; R. m+ s' o8 B' kthe output current is at least 200 mA.
% s2 D" d# V, N An over-current device shall not trip when the output current is less than 100 mA.0 l4 D. F- q) @* O
Care shall be taken that the value of the test voltage applied is measured within ±3 %. Z+ g) Z* m6 d
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to; X( @9 ^" q! O# f! r
the full value which is held for 1 min. |
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