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29.3对厚度合格有3个考核方法
6 u) s7 q9 w7 x3 `6 \% SCompliance is checked 0 C) s' O4 P9 T6 t
– by measurement, in accordance with 29.3.1, or
4 T- L# u2 W/ H/ ? `; l k– by an electric strength test in accordance with 29.3.2, if the insulation consists of more + t& a* z7 g8 S6 x9 Y3 W/ I
than one separate layer, other than natural mica or similar flaky material, or
$ H: l9 E9 i; q/ S) _– by an assessment of the thermal quality of the material combined with an electric strength 2 ~( F1 D$ X3 h# w3 J
test, in accordance with 29.3.3 2 y7 j0 f4 L j c. B+ i& Y, [
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。
7 c* Z& m; f, S3 i: H' q8 e个人理解 |
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