|
看看这个定义可能有助于理解 SELV 为嘛要加basic,% B% P' ?9 F3 m x8 @! N$ m6 Y
safety extra-low voltage( x, w$ c, i. f: U* o4 S
voltage not exceeding 42 V between conductors and between conductors and earth or% ~9 w. V2 W8 f9 @
functional earth, the no-load voltage not exceeding 50 V。
( x7 y7 P5 Y* |
' o6 H; m7 O# r$ J5 {' s( z) M& M8.1.4 An accessible part is not considered to be live if:! C* S4 \# B7 I, M% a. s) ?
– the part is supplied at safety extra-low voltage, provided that( d1 N" z9 m; d. p5 R
• for AC, the peak value of the voltage does not exceed 42,4 V;, d9 \0 \; n* j/ \$ W E2 M
• for DC, the voltage does not exceed 42,4 V;* f6 V. t& V. g+ K1 q& r3 I9 m9 ]
; S; g% N$ V# A7 c' ?7 d3 F
) L7 a" { U6 R8 G |
|