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如果从标准61558 字面意思来看,
1 \' s' o2 W1 o2 o5 M$ D19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
9 S# u& o' t8 C1 Nhave an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at
' p4 T5 e! H k- T- Jleast 3 mm.
6 W3 }; n1 H y: h1 b1 `( r- J' L1 ZThe drain hole is not required if the transformer, including its windings and core and all
% F2 w% L' `& Juninsulated live parts, are completely embedded in an appropriate potting material.
0 `! M3 K5 ?4 `0 Z5 G6 n4 ^) z2 C8 s( ~5 I
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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