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引用第21楼nw-interfans于2009-12-28 21:18发表的 :. I# Z c& ~9 w a! h2 u3 s
而IEC60884和VDE0620关于耐压实验是:
9 Y: v8 t' j, r4 j2 z1: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。
: L& x2 a! I2 b" G) G注2:在输出电流小于100mA时,过电流继电器不得工作。
+ W, N7 j% X' ]) z6 y& g60065标准中也有这么讲:4 }# a& O7 h# Y$ z: s
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The test voltages shall be obtained from a suitable source so designed that, when the output
. J0 \; ^3 h$ z* iTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
) p% o5 P4 s! F! Q: z, sthe output current is at least 200 mA.
3 o0 ^! y ]% W; u An over-current device shall not trip when the output current is less than 100 mA.4 W1 J' v, O1 n
Care shall be taken that the value of the test voltage applied is measured within ±3 %.7 E$ ^6 g/ N7 L( c
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to& X8 ~5 Q# }3 {- z! h
the full value which is held for 1 min. |
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