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如果从标准61558 字面意思来看,
J5 C2 w% {0 a7 |9 i- @19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
4 J4 N5 H: B& q% [- [7 G$ t) o9 m/ Whave an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at' [' @0 Z8 d( L1 ], B
least 3 mm.' g- e$ v; I& k5 e. G) f
The drain hole is not required if the transformer, including its windings and core and all5 j& f) }2 M: }# T
uninsulated live parts, are completely embedded in an appropriate potting material.2 f7 q8 }$ P l+ _5 B; v% y
7 {% P% B. i! a- U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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