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发表于 2007-7-7 16:27
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引用第21楼barry于2007-07-07 15:55发表的 :
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实在不好意思,误导你了。。。. |' N; L4 i, f3 S- h
' W) e0 J' {, \& B( g非常抱歉。。。
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! J. w& R7 \. n- a* E谢谢! 我明白了, 应该使用下面的条款(章节11.2.5) 可以解释:
& N% S, h" E+ Q% F9 Q– If the temperature is limited due to the operation of an integral non-resettable or a nonreplaceable protective device or due to the open circuiting of a winding, the temperature rises may be exceeded, but the test shall be carried out three times using new components.- l9 h( j# H4 ` u, Z4 @. p
/ J' P9 d! c2 U1 S) uIn the case of windings providing protection against electric shock or where a fault could result& w4 M* {7 V- c+ u
in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.35 U4 h3 j6 k. `, J j4 Z) {
without the humidity treatment of 10.2, starting within 1 min after the temperature rise, l) N4 h$ N% _' b; r; V( L8 z
measurement.
) h+ A8 Q4 J! \0 p( `3 W N9 c X温度保险起保护作用时, 温升可以超标, 但须通过标准规定的高压测试.
( L r+ m# r2 C- h% y. z) k引申的问题是: 温度保险丝须在多长时间内起保护作用, 是否可以应用60065章节11.2.1第一段话理解:
3 B" q* Q& r4 w: R4 U11.2.1 DR Measurement of temperature rises* h; F& o5 B& Y0 J8 U) N5 i0 y
The apparatus is operated under fault conditions and the temperature rises are measured after a steady state has been attained, but not later than after 4 h operation of the apparatus.' Z j1 B9 a' [ [9 L! Q
在达到温度稳定前, 但工作不超过4小时. 对吗? |
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