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加湿机UL998标准中,42.11章与42.12章,
42.11 For an extra-low-voltage safety circuit, if operation of the product with a short circuit or grounded
circuit may result in unsafe operation of the controlled device, spacings shall be not less than as specified
in Table 13.
42.12 For extra-low-voltage nonsafety circuits, spacings are not specified.
其中的extra-low-voltage safety circuit与extra-low-voltage nonsafety circuits怎么理解??谢谢 |
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发表于 2012-1-17 10:26:07
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