灯具驱动电源

cmk1991

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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

内置灯里的就用绝缘等级来分.

basic insulation
! R" ]. X! p5 [; l* K* o+ S0 o' hinsulation applied to live parts to provide basic protection against electric shock
) O1 Y1 P/ i. H; y- f: j& ]* g8 {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
1 G! u- `  N/ y! c' _single insulation system applied to live parts, which provides a degree of protection against
electric shock equivalent to double insulation

lxie

我也想知道这个问题

brent

class I lamp controlgear
independent controlgear in which protection against electric shock does not rely on basic
' `! P% n2 w2 D/ k+ Binsulation only, but which includes an additional safety precaution in such a way that means
7 n" n! A8 W+ B" hare provided for the connection of accessible conductive parts to the protective (earthing)
9 S& f. H$ g: \& h3 Qconductor 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.
: k+ R: V9 f8 Z# `
class II lamp controlgear
" `2 a  p) s) d2 m9 a! E5 W. hindependent controlgear in which protection against electric shock does not rely on basic
% x1 R) W+ x0 p7 {3 {* Uinsulation only, but in which additional safety precautions such as double insulation or
. j+ z/ P5 F5 y, t! Freinforced insulation are provided, there being no provision for protective earthing or reliance
( B# R" Z3 C* M  q: Gupon installation conditions

class III lamp controlgear
- \3 _# Z* E  dindependent 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

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

brent 发表于 2018-3-27 09:40
* Q8 z4 Z  A+ V8 ^, z内置灯里的就用绝缘等级来分.

  |! z& s1 V( C# ^basic insulation

( e7 G% ]9 M  U# \- t1 P% O5 Z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

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

% N8 i' m/ l; D. a这个只是针对于独立式驱动吧

cmk1991

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
  b9 {& G" J% c8 w8 n% l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

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。
1 J. |: M$ [9 j, P# K, I" ?
2 z4 v% q0 ]$ w5 ~; {相关的章节都有提到：
, }- p# Q; {8 J1 E' [5 _) T  [如：
耐压 L.8.3 Electric strength
b) live parts and the body, if intended to be connected to
protective earth;

* u( d. X/ ^' m绝缘电阻L.8.2 Insulation resistance
, S0 c4 U% q% O$ pBetween metal part of class II convertors which are separated from live parts by basic insulation only and the body

& Y6 i/ ^% O8 t: r: F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
% s# J: d# R( }变压器标准 26章节是 26.2 Creepage distances and clearances
; ]9 L5 h$ R' ~: T! UTable 13 里面有相关依据。  具体你可以去查看。