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看看这个定义可能有助于理解 SELV 为嘛要加basic,
- h& H1 {) c2 K( f1 Lsafety extra-low voltage% L5 S: e h: _) P, F
voltage not exceeding 42 V between conductors and between conductors and earth or
/ M! c5 L2 h$ z; u# I# \! Tfunctional earth, the no-load voltage not exceeding 50 V。
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7 C4 |3 `4 u3 ]0 r6 o7 o# k8.1.4 An accessible part is not considered to be live if:
+ E$ b1 E& d. l" d– the part is supplied at safety extra-low voltage, provided that. j z* c$ h8 }. ?7 u! N
• for AC, the peak value of the voltage does not exceed 42,4 V;8 F; n& O; n7 e/ @# V
• for DC, the voltage does not exceed 42,4 V;
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, M9 Q1 u2 t) c. z' F( ~+ M/ U* u5 n( E& E
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