|
加湿机UL998标准中,42.11章与42.12章,
0 E+ M% ?" I8 I5 o0 k* f2 |42.11 For an extra-low-voltage safety circuit, if operation of the product with a short circuit or grounded- T% a- P d% \6 i, m
circuit may result in unsafe operation of the controlled device, spacings shall be not less than as specified
* m; A7 S* }; @6 K in Table 13.6 K9 o8 c5 |0 c" \# U8 D
42.12 For extra-low-voltage nonsafety circuits, spacings are not specified.9 i1 l) \& Y6 P1 E/ h3 B
5 N: N, a" _3 u9 K
6 `4 E/ L6 d# F8 w: P& O% m! p其中的extra-low-voltage safety circuit与extra-low-voltage nonsafety circuits怎么理解??谢谢
& \, G: a) Y: Y+ F1 v- n0 o7 U( F |
|