请问这是什么符号？代表什么意思！

amote2008

???没见过

贺小梅

看来不是电气设备用的符号了，我翻了好久这个标准都没看到喔。。手酸。。

4sea

D-mark, means luminaire with limited surface temperature, it should meet the particular requirement defined in IEC 60598-2-24

wwnw_007

24.12.1 Temperature limits – normal operation          
For luminaires with the symbol, a temperature of 110 °C on all horizontal surfaces ofD          
# D& A8 ~* h) d  ?the luminaire exposed to the accumulation of dust shall not be exceeded, at 1,06 times the          
' {% }, d/ S: F% ?) [, s, qrated voltage and, on all vertical external surfaces, the maximum shall not exceed 150 °C at          
' t# A7 |' L2 L/ O' v- G1,06 times the rated voltage.          
If a luminaire has an outer surface likely to be positioned against part of a building (wall or          
! Q. F/ Z1 w8 a, Nsimilar), with a temperature higher than 90 °C, but not exceeding 150 °C, the luminaire shall be          
0 E- t, |6 W( a% d! g) n0 Tprovided with mounting instructions cautioning against such positioning.          
9 g) T' _; h  f0 l

wwnw_007

Luminaires with limited surface temperatures .....................
Figure 1 – Symbol
–––––––––
D

shenkaida

原来是限制表面温度的标注，又学了一招

kevin.lili

英语英语，我啥时候能看懂你啊！

kellyxu_2000

同学习