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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。。。, M( @& M( G5 A9 i C5 B' B9 h* |
4 g3 L. R+ i+ A( U1 e0 B9 \. | I非常抱歉。。。, c. R# }- g: J+ N6 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:) i; w# w( t4 L6 k( a
– 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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- R S( ?- ?$ i M, M9 ^' ^+ A' rIn the case of windings providing protection against electric shock or where a fault could result- _1 C b. ?( J# D1 h' C( ^* C
in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3" D! l; k9 E" C4 {
without the humidity treatment of 10.2, starting within 1 min after the temperature rise, a* D# K( b1 e8 i/ m
measurement.
/ i" ^; Z6 v. ^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.
6 `7 Q1 e0 B+ u, ?$ B5 q- n( G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:' Q$ j! |& J7 A7 w: ^0 u5 A
11.2.1 DR Measurement of temperature rises
6 l! H; v% b: D O$ `# Q# lThe 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.9 `$ t, b+ b( V' n( P- n
在达到温度稳定前, 但工作不超过4小时. 对吗? |
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