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29.3对厚度合格有3个考核方法
1 T$ `* }( U) k+ F' L2 | Z& s5 I" ^Compliance is checked ! `# B1 Z; o/ [5 j3 F
– by measurement, in accordance with 29.3.1, or
2 R+ \' w7 _6 G# Y3 c/ W u* Y) j– by an electric strength test in accordance with 29.3.2, if the insulation consists of more 2 i/ B+ m& E s0 w+ ?3 n X) o
than one separate layer, other than natural mica or similar flaky material, or
6 a: K: ?% M, [' U% R– by an assessment of the thermal quality of the material combined with an electric strength
) [: G& h. i% }test, in accordance with 29.3.3
9 W0 p7 ~9 |9 Y3 ~这样的结构肯定属于class II,厚度多少的目的只是为了达到经受可能会出现的电气应力,所以,如果符合该3个方法之一,可以接受。- e1 ?; }. e8 b9 H/ a
个人理解 |
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