|
引用第21楼nw-interfans于2009-12-28 21:18发表的 :
9 Q+ N" e( N' m6 a1 q4 [% {: J/ z而IEC60884和VDE0620关于耐压实验是:
& K( M; J/ ^' @" D. d2 W+ ~1 \1 e1: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。( S8 a! [! i5 v
注2:在输出电流小于100mA时,过电流继电器不得工作。
0 J8 ~' ^: g5 S7 Z$ c7 p60065标准中也有这么讲:2 Z& n- h; B1 D. M" @
" a( O' K6 `& m( O
The test voltages shall be obtained from a suitable source so designed that, when the output
) h" J6 V8 R! LTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
" c+ l0 d7 n& j. ^* dthe output current is at least 200 mA.! C; @9 g3 X; W' T5 \, \8 v& f: v
An over-current device shall not trip when the output current is less than 100 mA.9 E* ~, t$ \; E
Care shall be taken that the value of the test voltage applied is measured within ±3 %.
0 n- t2 @; X' L0 K. C+ v Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
" l' z1 X9 g7 a Ithe full value which is held for 1 min. |
|