灯具配驱动

cmk1991 · 发表于 2018-5-13 10:32

灯具配一个内置驱动，驱动有认证并且是接线端子接地，那么整个灯具需要接地到外壳上面吗？还是驱动端子接地就行。

fasten · 发表于 2018-5-13 20:39

6.14 Grounding and bonding
6.14.1 General
6.14.1.1 Non-current-carrying metal parts and metallized polymeric parts that are accessible during user
maintenance or component replacement without the use of tools and that can involve the risk of shock
shall be bonded to ground and shall comply with the bond impedance test of Clause 17.2. A luminaire with
non-current carrying parts bonded to ground shall have the resistance of the bonding circuit tested in
accordance with Clause 17.2.1. If the resistance exceeds 0.10 W, the bonding circuit shall be tested as
specified in Clause 17.2.3.
6.14.1.2 The following parts are not required to be bonded to ground:
(a) the links of a metal chain used to support a pendant luminaire;
(b) accessible non-current-carrying metal parts of luminaire components (for example,
lampholders and switches) that are isolated from live parts; or
(c) decorative parts, metal guards, and metal shades that do not enclose live parts.
6.14.1.3 An individual grounding conductor of a chain-and-canopy suspended luminaire shall be
interwoven through the chain from the luminaire to the canopy. Installation instructions shall be provided
in accordance with Table 20.1.1, Item 1.33.

如果是UL灯具，举UL1598来说，请参考红色字体部分，那是关键，that can involve the risk of shock是无法豁免的。
如果你驱动接地后，已经避免了involve the risk of shock，那么，外壳不接地又如何，那是可以的。

fasten · 发表于 2018-5-13 20:42

fasten 发表于 2018-5-13 20:39
3 j8 @3 V- F* U. ?6 H" m6.14 Grounding and bonding
3 T6 E- t$ q0 @4 X! l W7 f6.14.1 General; |) F! O O) L4 C
6.14.1.1 Non-current-carrying metal parts and metallized ...

再摘录EN60598来看，要求几乎类似：
7.2 Provision for earthing
7.2.1 Metal parts of class I luminaires which are accessible when the luminaire has been
mounted, or is opened for replacement of a replaceable light source or replaceable starter or
for cleaning purposes, and which may become live in the event of an insulation fault, shall be
permanently and reliably connected to an earthing terminal or earthing contact.
Metal parts screened from live parts by metal parts which are connected to the earthing
terminal or earthing contact, and metal parts separated from live parts by double insulation or
by reinforced insulation, are not, for the purpose of this requirement, regarded as likely to
become live in the event of an insulation fault.

cmk1991 · 发表于 2018-5-13 21:14

fasten 发表于 2018-5-13 20:39
! x6 {9 [$ _ w$ y6.14 Grounding and bonding
9 ^9 D2 U" q4 l5 V- f6 a& Q h6.14.1 General' h. j6 v: X/ q9 K! Y; c
6.14.1.1 Non-current-carrying metal parts and metallized ...

感谢fasten的解答

付小胜 · 发表于 2018-5-14 08:56

7.2.1 ....It is allowed to earth built-in control gear by means of fixing the control gear to earthed metal parts of the luminaire. Connection to protective earthing of the luminaire via the built-in control gear is not allowed.要留意以上这句话，如果是保护接地的话，灯具金属外壳还需要额外的接地。

zengvison · 发表于 2018-5-14 20:53

看你的驱动输出是不是SELV了，如果是SELV的，那么即使是金属外壳，其也不需要接地。但是如果你想灯具的金属外壳通过驱动来接地，那样就是不行的了。

cmk1991 · 发表于 2018-5-14 20:58

zengvison 发表于 2018-5-14 20:53; ?) E9 O* W; F# c9 G8 U5 J8 W/ v
看你的驱动输出是不是SELV了，如果是SELV的，那么即使是金属外壳，其也不需要接地。但是如果你想灯具的金属 ...

驱动输出是SELV，灯具金属外壳，没有接地。

lxie · 发表于 2018-5-22 10:12

就算输出是SELV，但是如果金属外壳包裹初级部分，也是要接地的啊，因为初级还是高压，还是危险端

raintime · 发表于 2018-5-29 20:22

不接受, 如何满足标准里面如下要求：
It is allowed to earth built-in control gear by means of fixing the control gear to earthed metal
parts of the luminaire. Connection to protective earthing of the luminaire via the built-in control
gear is not allowed.

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[IEC灯具] 灯具配驱动

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