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如果从标准61558 字面意思来看,0 [# v7 \! j3 ?* h1 x4 l" u
19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
" R, N/ R+ l' shave an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at. C# n! Q. D T
least 3 mm.
+ @3 q- U+ S" O/ q" k3 u/ _The drain hole is not required if the transformer, including its windings and core and all2 h5 W7 b4 Y' A: Q- Z) H
uninsulated live parts, are completely embedded in an appropriate potting material.
u8 F% e* O$ ]- N8 P7 I8 j) _, Q) r( ~2 C0 E( [
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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