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引用第21楼nw-interfans于2009-12-28 21:18发表的 :
; K% Q' C% S( k2 Q' Y' C而IEC60884和VDE0620关于耐压实验是:; x! g7 K2 |2 O+ a
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。* Y& i: X' f7 g2 H/ h8 O% }: {' N6 _
注2:在输出电流小于100mA时,过电流继电器不得工作。
1 | t. d8 a. u8 f3 ?60065标准中也有这么讲:& [' h# e: x8 K
8 t4 g: m, y8 q( m3 ~- u$ k
The test voltages shall be obtained from a suitable source so designed that, when the output
% v" z' _/ i/ l" ]9 G( q" L* R8 MTERMINALS are short-circuited after the test voltage has been adjusted to the appropriate level,5 ^6 l2 |5 h5 E+ ~4 L! {
the output current is at least 200 mA.. m5 z- D( H# Z0 v
An over-current device shall not trip when the output current is less than 100 mA.
]# b, L0 }+ Y: U2 M4 J: R9 \ Care shall be taken that the value of the test voltage applied is measured within ±3 %.% B& g% S0 t. G6 _- a6 e
Initially, not more than half of the prescribed test voltage is applied, then it is raised rapidly to
" O2 I, y6 m5 ~' H% u, H; V6 @the full value which is held for 1 min. |
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