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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 :- O! E# l6 ^9 b+ C, d. N7 O
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: c7 g9 p5 N; i% y& y实在不好意思,误导你了。。。
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非常抱歉。。。1 A t+ S; T# k+ r9 W
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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:
7 |1 q& g1 l- D– 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+ i8 D) \: K6 U
in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3
5 x/ \3 `$ z# Dwithout the humidity treatment of 10.2, starting within 1 min after the temperature rise
6 ?7 g/ @: t$ v1 z# Wmeasurement., c4 S9 X3 N, I' g# j" W4 T
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.( R7 ~3 x* K! p* ?/ I
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:
% o, X5 H0 t% ]" v11.2.1 DR Measurement of temperature rises& a- b0 a# e) P' @' H" v; S1 y( p
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.
- L, Z2 S! B4 z& D* L- \2 M& i在达到温度稳定前, 但工作不超过4小时. 对吗? |
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