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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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5 W& @; A$ J3 ~( {/ n% C: x实在不好意思,误导你了。。。
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4 W C5 s; R: I# ^7 R非常抱歉。。。
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, S* r5 [: ` n3 b) q谢谢! 我明白了, 应该使用下面的条款(章节11.2.5) 可以解释: h# p# S @0 g3 `$ a, f
– 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.# @2 b& I5 u$ c" z0 H- z# ~
; R2 z8 i5 m( [/ ~- z+ H9 \In the case of windings providing protection against electric shock or where a fault could result
0 q8 ^, c8 e+ b3 V& t4 l0 _in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3* p( ?- b i2 I( }( Z- \; K* [
without the humidity treatment of 10.2, starting within 1 min after the temperature rise
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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.
* {. K- C8 }& y- G0 ^0 R/ F- D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:
- S( W: F7 z: }. d8 A11.2.1 DR Measurement of temperature rises
' e: C1 L. H7 `, Z; B4 S7 zThe 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.
% R) H5 b& [4 n% Z. B/ L/ M在达到温度稳定前, 但工作不超过4小时. 对吗? |
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