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如果从标准61558 字面意思来看,+ i/ |1 I) n+ l/ a
19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall# j1 M* i3 z# S1 }3 Q# X
have an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at% O3 b* [& x0 i
least 3 mm.$ l2 [0 l* j! i& L- L6 O* l
The drain hole is not required if the transformer, including its windings and core and all
n. |+ k5 `! a$ b! @uninsulated live parts, are completely embedded in an appropriate potting material.. x/ J% ^; @ g0 g) w1 c
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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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