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29.3对厚度合格有3个考核方法) B7 d. ~, b; e; u
Compliance is checked
' u* V3 F5 b& ~ D– by measurement, in accordance with 29.3.1, or % w5 S& E1 n& A* e1 U
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more . l2 C& f4 W8 A
than one separate layer, other than natural mica or similar flaky material, or 9 i2 e. L' S6 Q' E
– by an assessment of the thermal quality of the material combined with an electric strength
( q! G% h4 x" U) qtest, in accordance with 29.3.3 & \, J# |5 H5 P+ a9 s$ h7 ~7 \( u
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。4 ]$ j' C' s8 @0 O+ K
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