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看看这个定义可能有助于理解 SELV 为嘛要加basic，
7 b4 J: n/ i/ e; {5 X+ c8 `5 rsafety extra-low voltage
! N; g. s8 ?. L* ivoltage not exceeding 42 V between conductors and between conductors and earth or/ G# t" M- ~* J) p
functional earth, the no-load voltage not exceeding 50 V。
8 w) z! W1 u' m4 c; l- I. K5 S; |- ^% t/ _7 S1 l) T
8.1.4 An accessible part is not considered to be live if:
3 w' R' X& Q: K1 m$ _0 f C– the part is supplied at safety extra-low voltage, provided that
1 ]# w2 [ D, W; b) ?5 y) ]2 b/ Y; W• for AC, the peak value of the voltage does not exceed 42,4 V;! U1 ~6 z/ _0 R& M3 I9 ~
• for DC, the voltage does not exceed 42,4 V;
% }% L: e' v0 [# g) P! Q1 \8 ~, e; ^# }+ i2 \( y
& k& O2 p s8 o- b, E% I3 a9 }
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发表于 2024-5-28 15:58
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