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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。。。/ c. E, X. f* P( j9 ~ ?; I q# ?
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非常抱歉。。。/ A0 i# b4 Q! e% c
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谢谢! 我明白了, 应该使用下面的条款(章节11.2.5) 可以解释:! |+ f& ~/ w) v ~ {1 q% m
– 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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. z! _- N7 y% k5 j- `) ~& |In the case of windings providing protection against electric shock or where a fault could result
5 J5 @4 Z3 B4 K) T7 c( Din a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3
8 B& D1 u$ u y7 L; N3 U9 wwithout the humidity treatment of 10.2, starting within 1 min after the temperature rise; x2 S* k R& b# e8 c' ^
measurement.6 C# N# D* h( A
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.
" H' [! I7 G5 b' Y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:
; ~7 c: [ r3 D3 W. Z11.2.1 DR Measurement of temperature rises
1 c; n0 l. F5 J7 B0 K8 c5 _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.
% E5 l+ H L* T4 [在达到温度稳定前, 但工作不超过4小时. 对吗? |
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