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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
0 l6 H9 Y }' P5 c" F而IEC60884和VDE0620关于耐压实验是:- j U% ^" I8 {) D- f. [" N! e+ Z/ H
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。
5 o4 {/ { o Y$ U! p# W# y4 X注2:在输出电流小于100mA时,过电流继电器不得工作。 + l$ X5 G+ b& c
60065标准中也有这么讲:+ E% P K) i! y
9 J: @3 J2 D* y The test voltages shall be obtained from a suitable source so designed that, when the output; B8 V* p7 T3 S- ]7 `" v
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,7 a+ o# Q: k, `) B9 [9 H
the output current is at least 200 mA.. B! p9 ^7 [) y. w4 U
An over-current device shall not trip when the output current is less than 100 mA.
' K. z C* \% {0 E; J Care shall be taken that the value of the test voltage applied is measured within ±3 %.
) t+ K# t) k# @) M! P- { Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
# q$ S. t5 d7 t" W! O$ l9 Tthe full value which is held for 1 min. |
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