cmk1991 发表于 2018-3-26 22:57

灯具驱动电源

灯具的驱动电源I类，II类，III类怎么区分，只是针对于独立式驱动吗，还是整体式驱动和嵌入式驱动也有I类， II类和III类的区别呢？

brent 发表于 2018-3-27 09:40

内置灯里的就用绝缘等级来分.

basic insulation
insulation applied to live parts to provide basic protection against electric shock
I.2.5
supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation
I.2.6
double insulation
insulation comprising both basic insulation and supplementary insulation
I.2.7
reinforced insulation
single insulation system applied to live parts, which provides a degree of protection against
electric shock equivalent to double insulation

lxie 发表于 2018-3-27 09:32

我也想知道这个问题

brent 发表于 2018-3-27 09:36

class I lamp controlgear
independent controlgear in which protection against electric shock does not rely on basic
insulation only, but which includes an additional safety precaution in such a way that means
are provided for the connection of accessible conductive parts to the protective (earthing)
conductor in the fixed wiring of the installation in such a way that accessible conductive parts
cannot become live in the event of a failure of the basic insulation.

class II lamp controlgear
independent controlgear in which protection against electric shock does not rely on basic
insulation only, but in which additional safety precautions such as double insulation or
reinforced insulation are provided, there being no provision for protective earthing or reliance
upon installation conditions

class III lamp controlgear
independent controlgear in which protection against electric shock relies on supply at safety
extra-low voltage (SELV) and in which voltages higher than those of SELV are not generated

weng_qing_wen 发表于 2018-3-27 17:25

驱动有接地端子的就是一类驱动
没有接地的输入是100-240的是二类驱动
没有接地的输入是低压的是三类驱动
独立式驱动，整体式驱动和嵌入式驱动是按 安装方式分类的。
I类，II类，III类是按 防触电等级分类的。

cmk1991 发表于 2018-3-27 22:36

brent 发表于 2018-3-27 09:40
内置灯里的就用绝缘等级来分.

basic insulation


也是就是内置驱动和整体式驱动 没有I类，II类，III类的说法吧。

cmk1991 发表于 2018-3-27 22:37

brent 发表于 2018-3-27 09:36
class I lamp controlgear
independent controlgear in which protection against electric shock does no ...

这个只是针对于独立式驱动吧

cmk1991 发表于 2018-3-27 22:38

weng_qing_wen 发表于 2018-3-27 17:25
驱动有接地端子的就是一类驱动
没有接地的输入是100-240的是二类驱动
没有接地的输入是低压的是三类驱动
...

那针对于SELV的内置式驱动或整体式驱动，判断附录L是要区分I类 II类吗

weng_qing_wen 发表于 2018-3-28 08:58

cmk1991 发表于 2018-3-27 22:38
那针对于SELV的内置式驱动或整体式驱动，判断附录L是要区分I类 II类吗

要的。

相关的章节都有提到：
如：
耐压 L.8.3 Electric strength
b) live parts and the body, if intended to be connected to
protective earth;

绝缘电阻L.8.2 Insulation resistance
Between metal part of class II convertors which are separated from live parts by basic insulation only and the body

爬电距离和电气间隙 L.11 Creepage distances, clearances and distances through insulation
参考的是 Clause 26 of IEC 61558-1:2005
变压器标准 26章节是 26.2 Creepage distances and clearances
Table 13 里面有相关依据。具体你可以去查看。
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