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          
the luminaire exposed to the accumulation of dust shall not be exceeded, at 1,06 times the          
rated voltage and, on all vertical external surfaces, the maximum shall not exceed 150 °C at          
. N3 X6 `. U3 I$ J1,06 times the rated voltage.          
) Y9 A/ J, L1 G3 BIf a luminaire has an outer surface likely to be positioned against part of a building (wall or          
- q. c& c" E+ f' F/ osimilar), with a temperature higher than 90 °C, but not exceeding 150 °C, the luminaire shall be          
' I, ^* F4 }; Z3 Vprovided with mounting instructions cautioning against such positioning.          

wwnw_007

Luminaires with limited surface temperatures .....................
/ i; ]0 ?6 K6 q/ c( FFigure 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