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29.3对厚度合格有3个考核方法5 D$ b5 X0 Q2 d3 ]! L$ m+ F
Compliance is checked
# K/ ? f4 C/ N$ c T5 s– by measurement, in accordance with 29.3.1, or ! e) N" L) W1 ?
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
; X5 }& e2 Z$ x6 qthan one separate layer, other than natural mica or similar flaky material, or " Y- J* E4 z2 ] \, `/ n C
– by an assessment of the thermal quality of the material combined with an electric strength
! g' Q5 x( a) W! Qtest, in accordance with 29.3.3 " o2 z n+ }1 G
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。. I6 J' U9 }; D! U$ ?
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