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如果从标准61558 字面意思来看,
: c) K% w4 F# H% ~+ v19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
0 E4 g( c+ j2 e; Y3 J% {have an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at
$ x" X0 V: c5 J3 J( Uleast 3 mm.1 ]3 g% K2 b, U0 p+ b& A* `5 G
The drain hole is not required if the transformer, including its windings and core and all% A3 R3 B, _; ]2 d$ k
uninsulated live parts, are completely embedded in an appropriate potting material.
& p* B) G' @, M- T" r' L6 t' m) w3 ~
; N3 t+ m2 D4 k2 K0 X0 x% U/ ^0 m) ~1 F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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