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如果从标准61558 字面意思来看,
% f' \: U$ U! i19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall6 S, ]1 f2 l0 N3 h! y- I4 c) B
have an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at) C% U0 x& P! Y$ E: I- [
least 3 mm.
1 P( j! p& I$ bThe drain hole is not required if the transformer, including its windings and core and all6 x% ?! t% g0 ]% h, b6 ~# P
uninsulated live parts, are completely embedded in an appropriate potting material.
+ ~8 e& |0 g0 j) `/ K" y0 B" {! s/ M+ V) Y. d; H
最后一段,线圈、铁心 和所有没绝缘的带电体,都要完整地覆盖 |
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