DSH 385 Flammability of materials and components

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广东安规检测
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小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 385 ' r  M6 |4 }1 b7 R1 z6 d + b7 }8 k4 o8 I

Flammability of materials and components

4.4.3

60950(ed.2) * e1 d" q: |1 Q* D; g

8 @3 f5 a6 k0 G5 KStandard:
IEC60950, 2nd Edition
& Z: V. m! Q6 Q9 c7 p; X3 PSub clause:
4.4.3
Sheet n. 385
  s5 c; k2 z6 JPage 1 (1)
6 t2 }9 u$ R" TSubject:
: `( P7 I* G3 Z$ A% HFlammability of materials and
# X( y/ Y5 L2 y, |3 icomponents
Key words:
" n. j2 w9 O# o3 l. S-Fire enclosure
-Flammability
7 o/ N8 Z6 n8 F: ]2 H& YDecision confirmed
at CTL 38th meeting
Question:
- L% V+ ~7 K2 {# ~' k  j, S9 j$ vIt is allowed to add decorative parts with flammability class HB to the outside of the fire
' |% {$ A+ `0 |4 Q8 Y1 `2 K0 L& jenclosure of, for example, a computer. Consider the situation that the computer is, then,
installed inside the fire enclosure of bigger equipment. According to the standard, parts
inside a fire enclosure of the bigger equipment must meet the requirements of clauses 4.4.3.2
7 |7 D! P$ _) t+ P  ^0 zand 4.4.3.3: all materials inside a fire enclosure must be of flammability class min V-2 or
HF-2. It is not clear whether the decorative HB material on the outside of the computer is
& a4 L9 J$ `* J' _8 ~  iexempted from this requirement since the computer has been approved separately
  W+ k* `% H7 B8 w" oDecision:
& L0 C( ?/ a6 m; }& C& XHB material inside a fire enclosure is not allowed, reference clause 4.7.3.4 in the 3rd ed.


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