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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。。。% x, k5 z$ S" B7 D: P
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非常抱歉。。。
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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:
5 _( v4 t9 ?: |: E) V– 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.% H4 t! }+ ^3 }" G
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In the case of windings providing protection against electric shock or where a fault could result _ H7 y8 Z1 X- S: G) v$ R# i
in a fire hazard, the winding is then in each case subjected to the dielectric strength test of 10.3
8 ?2 ^3 }* |0 _* lwithout the humidity treatment of 10.2, starting within 1 min after the temperature rise& m- L: e2 x% X5 b4 L( t9 H! k
measurement. ?, m- [3 O$ _( D! q9 }/ G8 R
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.
1 A2 X3 w: k% C# |3 W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:6 G- l X7 y# Q6 h( E, c
11.2.1 DR Measurement of temperature rises
1 G- {1 k4 X, q' d/ {7 @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.
% P! u8 e& [8 \- V) R0 u在达到温度稳定前, 但工作不超过4小时. 对吗? |
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