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如果从标准61558 字面意思来看,5 V' k7 W1 k9 V- V$ ^
19.17 Transformers having a protection index from IPX1 up to and including IPX6 shall
8 k$ r: k) v/ b1 f/ F! Z3 bhave an effective drain hole at least 5 mm in diameter or 20 mm2 in area, with a width of at# P9 g: O5 Y$ t* @+ [
least 3 mm.8 z/ [7 A1 B: K$ L2 H2 i9 k
The drain hole is not required if the transformer, including its windings and core and all
, G# U4 d$ {( p) Y: v, huninsulated live parts, are completely embedded in an appropriate potting material.' r7 b# `% ~7 d) X( m- b% n8 r
/ {# X6 ?, m/ s: T( Z8 I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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