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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
8 I# r" n2 y) f$ j而IEC60884和VDE0620关于耐压实验是:
) m- i) i. m$ _6 S& P! Q9 v1: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。
7 O, m% Z2 ^: [6 E- m注2:在输出电流小于100mA时,过电流继电器不得工作。 / G8 H: M+ ^. n/ j) |4 V
60065标准中也有这么讲:$ |7 Y' |- ?1 K( r& l1 q- ~) n
, v+ D' m7 x/ x, }" C
The test voltages shall be obtained from a suitable source so designed that, when the output
- F7 H. d/ ~7 a: r1 hTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,4 X6 A6 S' c1 n! _
the output current is at least 200 mA.
/ s7 w1 k: K6 A9 E) x3 J* D An over-current device shall not trip when the output current is less than 100 mA.
( i' L p2 O6 l$ h6 U/ e" \" G8 z* ? Care shall be taken that the value of the test voltage applied is measured within ±3 %.
. C( F0 ?+ R: Z1 J1 H2 W' k Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to# r6 F# n! o( H
the full value which is held for 1 min. |
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