极品老工 发表于 2013-4-10 09:44

外壳塑料手柄有电镀层,其温升限值有什么要求?

好象见过有相关决议,但忘了,求解。

zhoufuyou 发表于 2013-4-10 10:34

我也想知道

极品老工 发表于 2013-4-10 11:19

zhoufuyou 发表于 2013-4-10 10:34 static/image/common/back.gif
我也想知道

已解决,见温升表的注3。

520168 发表于 2013-4-10 12:00

是那个标准?我看UL的产品是按导热率来算的,:)

520168 发表于 2013-4-10 12:44

UL1310表31.1 (c)材料的导热系数大于2.419Btu/h/ft2/ft/℉(0.01c/s/cm2/cm/℃)可被考虑为金属。
IEC标准产品塑料外壳有电镀层是不是也按金属来算限制温度。

Dan_Tan 发表于 2013-4-10 18:29

见CLause 11.8 of IEC 60335-1 A2006 note

plmijb 发表于 2013-4-12 08:51

EN 60335-1 表3中 ZB,ZC,ZD 中有要求。
zb When the thickness of plastic coating does not exceed 0,3 mm, the temperature rise limits of coated metal or glass and ceramic apply.
zc Metal is considered coated when a coating having a minimum thickness of 80 μm made by enamel or non substantially plastic coating is used.
zd The temperature rise limit applies also for plastic material having a metal finish of thickness less than 0,1 mm.

of bare metal   50
– of coated metal zc      60
– of glass and ceramic    65
– of plastic having a thickness exceeding 0,3 mm zd    75

mikk 发表于 2013-4-12 12:43

可是,学习啦~:)

shinylee 发表于 2013-4-12 14:06

按模制材料

gazerx 发表于 2013-4-12 16:33

看标准看得头晕:dizzy:
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