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看看这个定义可能有助于理解 SELV 为嘛要加basic,' V# X, ? h9 }% B4 I
safety extra-low voltage/ P. a5 B% H% z, n8 O3 c
voltage not exceeding 42 V between conductors and between conductors and earth or
4 }6 O0 V! e! v$ _$ b& ?functional earth, the no-load voltage not exceeding 50 V。
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1 W. q2 w9 `" C q6 {8.1.4 An accessible part is not considered to be live if:
( q3 J/ q: T3 R4 p$ t– the part is supplied at safety extra-low voltage, provided that
7 d4 P. S8 p5 M" S• for AC, the peak value of the voltage does not exceed 42,4 V;
/ O$ }2 e: F0 r" ?• for DC, the voltage does not exceed 42,4 V;; D/ Z/ J, K6 [* y' ~5 {/ D g) |, A
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