|
引用第21楼nw-interfans于2009-12-28 21:18发表的 :
* L/ T. t' p s( f- d而IEC60884和VDE0620关于耐压实验是:9 K% G$ F5 u3 `9 I& {5 p
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。1 F1 z9 t& ^ o. C3 X. ]/ |" ^( C
注2:在输出电流小于100mA时,过电流继电器不得工作。
4 S4 R4 g$ b% v( W1 b; O) H60065标准中也有这么讲:
# G, ]/ `- w* q, Z* m/ h3 L1 R' _( h" J" A+ d$ w
The test voltages shall be obtained from a suitable source so designed that, when the output( u1 I9 z, l' h1 k3 p7 k& F
TERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,
& m% {4 S5 Z% |7 bthe output current is at least 200 mA.6 _# V& M5 J) z1 m
An over-current device shall not trip when the output current is less than 100 mA.+ B# j- L/ ^6 X7 Q1 n
Care shall be taken that the value of the test voltage applied is measured within ±3 %.9 S2 d# _2 r6 `2 y8 b* d' i
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to) Z# r$ e, p" u! @4 T H: O
the full value which is held for 1 min. |
|