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引用第21楼nw-interfans于2009-12-28 21:18发表的 :$ ?6 c( ^5 d0 [4 C/ R8 I5 e
而IEC60884和VDE0620关于耐压实验是:
7 r/ N: j! Y" N8 O5 A I1: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。
2 v; `; {6 F& {( _ n6 `- k注2:在输出电流小于100mA时,过电流继电器不得工作。
I2 b5 T4 ^5 s/ {/ t60065标准中也有这么讲:
2 j. v7 o9 H7 [9 ~1 x
& ~( x# {! a5 U7 [# J0 M The test voltages shall be obtained from a suitable source so designed that, when the output6 C& d3 P0 c5 q$ g
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
1 e4 R# O; m" s5 U+ U( `the output current is at least 200 mA.* e. @' N3 `& V" ~& a
An over-current device shall not trip when the output current is less than 100 mA.
3 ~0 v3 W9 V5 X9 w3 g S Care shall be taken that the value of the test voltage applied is measured within ±3 %.
9 K& @. x: s x5 T7 f Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
5 P. Q# p" Z- k, _the full value which is held for 1 min. |
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