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[LITE] DSH 866 Flammable materials

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小米

发表于 2012-9-5 14:41 | 显示全部楼层 |阅读模式

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DSH 866

Flammable materials

4.15

60598-1(ed.3);am1 & 60598-1(ed.4);am1 & 60598-1(ed.5) & 60598-1(ed.6);am1 & 60598-1(ed.7)

Question:
Covers / shades and similar parts, which cannot withstand the 650°C glow wire test, shall be adequately spaced from any heated part that could raise the material to its ignition temperature. Generally the temperature of the lamp or the ballast / transformer will not rise the material to its ignition temperature, because the maximum temperature of the outside of a (compact) fluorescent lamp or small incandescent lamp is simply too low to do so. Besides there is a difference between the flash-ignition temperature of
materials. Practical example is a lighting chain with plastic decorative cover, spaced about 15 mm from the lamp. The maximum temperature on the outside of the lamp (measured during the bridging test) was 180°C and the ignition temperature of the relevant material is much more than 180°C.
Decision:
As the ignition temperature is not known over the life time, the ignition temperature of the relevant material shall not be considered.

amp

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[LITE] DSH 866 Flammable materials

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