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看看这个定义可能有助于理解 SELV 为嘛要加basic,& N) q4 W4 K5 x* |% B+ C7 w7 }, m: A
safety extra-low voltage
' K$ z( f) w) s" P( {! \voltage not exceeding 42 V between conductors and between conductors and earth or+ p! u, t5 q5 L3 V2 g
functional earth, the no-load voltage not exceeding 50 V。
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7 y& u$ u4 o. l! A- m$ Y- q% f8.1.4 An accessible part is not considered to be live if:. o8 y4 p$ a4 m4 } X* }% @
– the part is supplied at safety extra-low voltage, provided that
& L( D3 K7 [4 Q• for AC, the peak value of the voltage does not exceed 42,4 V; i, A+ ^0 u# z
• for DC, the voltage does not exceed 42,4 V;
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