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如果从标准61558 字面意思来看,6 e$ e' ^5 E1 s
19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
; v/ J. l( O* W4 R q. c. ^have an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at0 y% c$ h* P4 {7 P$ g+ W6 L) @
least 3 mm.% u/ t+ q/ Y* v1 F9 a
The drain hole is not required if the transformer, including its windings and core and all
& _0 s0 E+ x# {; Z; Duninsulated live parts, are completely embedded in an appropriate potting material.. X9 L" M7 q1 @
0 ]' W# y$ e8 R7 }; }) A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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