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加湿机UL998标准中,42.11章与42.12章,
" J) S s' ~- J) _; k9 c6 B* u42.11 For an extra-low-voltage safety circuit, if operation of the product with a short circuit or grounded" e" P7 Y) ~3 v M4 M
circuit may result in unsafe operation of the controlled device, spacings shall be not less than as specified
" ~0 K: Z' G7 e$ Y( o! y in Table 13.
0 h/ x% I E2 R5 S; t B1 O42.12 For extra-low-voltage nonsafety circuits, spacings are not specified.9 ~- D6 ]1 `# h: j; E. g
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+ D0 a: k) q' S: d; ?/ m# }0 a其中的extra-low-voltage safety circuit与extra-low-voltage nonsafety circuits怎么理解??谢谢
1 ]5 \2 `4 s, {2 y9 z5 N+ ~( K+ B |
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