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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 :9 o" K/ A0 V+ c! T
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! |7 J8 V" C# v$ S# @实在不好意思,误导你了。。。
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/ X2 M& m, y( G! Z5 x非常抱歉。。。
5 o* p' d" j4 T) d, p....... 7 p5 G1 H1 s2 |1 H+ t* B! _4 X
谢谢! 我明白了, 应该使用下面的条款(章节11.2.5) 可以解释:
5 g& P" |$ a' K* U* R/ t– 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.
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In the case of windings providing protection against electric shock or where a fault could result% q4 O3 ^* L$ o# ]
in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3
* l: f' j+ t4 @$ |: ~) E lwithout the humidity treatment of 10.2, starting within 1 min after the temperature rise! h2 b) w5 \0 G: h4 Q
measurement.
; l% `! F/ H! w- X5 x/ j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.
4 b3 {3 L' O, B4 d& @8 j. [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:- e& s" y3 g: o* }+ G4 N6 {' d/ ~
11.2.1 DR Measurement of temperature rises
5 m, p3 ?# X4 q, SThe 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.; J! o, r( p4 }6 G3 v
在达到温度稳定前, 但工作不超过4小时. 对吗? |
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