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如果从标准61558 字面意思来看,
. D0 {. j0 g2 r _# g$ E- ~19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall! c9 S3 {' L1 u
have an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at2 D) L. q/ |) F! J9 w* C* l
least 3 mm.7 f6 p' a, ^3 E5 }* K6 R
The drain hole is not required if the transformer, including its windings and core and all
' \, t$ n: _, L8 a& G7 a6 Runinsulated live parts, are completely embedded in an appropriate potting material.1 v: s+ r6 m. z
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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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