terry20120318 发表于 2018-7-10 14:19

排气扇额定频率标识

各位大侠，
请教一下，排气扇标识 额定频率 标识为 220-240V~ 50/60Hz 是否可以，是否必须标识为220-240V~ 50-60Hz，谢谢

7.3 Appliances having a range of rated values and which can be operated without
adjustment throughout the range shall be marked with the lower and upper limits of the range
separated by a hyphen.
NOTE 1 Example: 115-230 V: The appliance is suitable for any value within the marked range (a curling iron with
a PTC heating element or an appliance incorporating an input switch mode power supply).
Appliances having different rated values and which have to be adjusted for use at a particular
value by the user or installer shall be marked with the different values separated by an
oblique stroke.

BillWei 发表于 2018-7-10 17:54

标识为 220-240V~ 50/60Hz 可以

kangnilaien 发表于 2018-7-11 07:38

严格来讲标50/60Hz,用这个“/”是要可调的。自适应的建议标50-60Hz。这里有争议，为了免除麻烦，建议50-60Hz

ylgc123 发表于 2018-7-12 11:36

如果你现在去做CB、CE之类认证，99%的工程师都会建议你写50-60Hz，置于原因，板凳层已经说了~

869377558 发表于 2018-7-13 08:32

2种都可以

yuzhiqiang 发表于 2018-7-13 15:07

建议50-60Hz

laoying 发表于 2018-7-21 08:54

弱弱的请教一句，50-60会不会有点不切实际

stey 发表于 2018-7-21 09:51

电网供电频率都是有严格的偏差限定，不会超过±1%，但标准就这么规定的。

ZT_ 发表于 2018-7-22 13:50

如果频率必须是50或者60，那就必须用/

四目鱼 发表于 2018-10-10 16:16

50-60的是宽频了~~~50/60是两种频率，不一样吧~~
页: [1] 2
查看完整版本: 排气扇额定频率标识