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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
/ N* |$ c6 M" f/ q$ j而IEC60884和VDE0620关于耐压实验是:; J# V9 g2 ]5 c; r# z
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。
, A2 [# Z' @" n5 `8 r4 t" M: r注2:在输出电流小于100mA时,过电流继电器不得工作。
" p! d& B3 z3 `. ~60065标准中也有这么讲:( e6 T4 Z" I W4 _
) I% \: w+ ^. W, C
The test voltages shall be obtained from a suitable source so designed that, when the output9 K; N$ L" C; u0 [2 e. \: E1 g9 R8 n
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,- p% y2 q+ `5 e
the output current is at least 200 mA.
8 B$ F5 z: x$ I0 k: G3 I- o; u' l An over-current device shall not trip when the output current is less than 100 mA.! y( R6 k# n; S: g7 `8 L# [3 ]
Care shall be taken that the value of the test voltage applied is measured within ±3 %.
: a+ E) t" F b- a" a u7 I0 A3 c Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
; v9 u" s% w! v- f6 Y' T; tthe full value which is held for 1 min. |
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