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楼主: 李云峰

[线缆测试] 关于UL线缆测试的讨论贴!

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 楼主| 发表于 2007-8-20 17:50 | 显示全部楼层
广东安规检测
有限公司提供:
引用第47楼dzxtt于2007-08-12 13:24发表的  :) Z7 p- c& b4 w
热延伸是否是线材老化后的伸长率呢?标准里有规定的啊
热延伸是针对材料的测试,不是老化后的伸长率,他是要求在一定的温度下对试样施加一定的机械负荷,等到规定的时间以后测量负荷下的伸长和撤去负荷的伸长,与原试样的长度之比!
发表于 2007-8-20 19:27 | 显示全部楼层
有的也叫加热变形试验-----实际与楼上李兄说的是一样的;1 h  n: F6 T9 x/ E: k
例如--UL62规定:) m9 \4 B5 L) G" A# D8 L
NMX-J-1914 x4 ?, j; D' _3 m5 |# U6 b" W4 u
Heat Deformation of Semiconductive Shielding, Insulations and Protective Coverings of Electrical
3 ?4 E- Y* J* x1 M+ DConductors – Test Method
9 i0 x3 t6 ?/ Y! c
* O1 C/ v, ^" E& u3 c3 H/ V, o5.1.3 Deformation
9 F1 R* w0 g9 [2 D. K! R8 F' l2 [5.1.3.1 Insulation; U0 N0 b5 ]6 {' K4 T$ M" E
The insulation on single-conductor wires, and on the individual conductors (separated, in the case of+ s+ m" D. P/ Y
parallel cords), shall not decrease by more than 50% in thickness when subjected to a force caused by a# N0 B( f, V- x, z; ~0 m
mass as shown in Table 40, and while maintained at the temperature shown in Table 40 for 1 h.
. Q$ E7 c' ^! @0 `/ F* O: H5 M5.1.3.2 Jacket$ k" Z: g; a3 Q& @: [: l
Smoothed specimens of jackets from finished cords and cables shall not decrease by more than 50% in
0 x, l& b- q1 J% j. Gthickness when subjected to a force caused by a mass of 2000 g, and while maintained at the temperature
0 l. N. _* S  Y) |! M& Jshown in Table 40 for 1 h.
  e! x3 Y! G* G+ q5.1.3.3 Method
4 a0 ^# x; p% k0 b$ \Compliance with Clauses 5.1.3.1 and 5.1.3.2 shall be determined in accordance with the method7 N  {1 a9 _6 ?( b6 D4 Z1 }. r
described in CSA C22.2 No. 0.3, Clause 4.3.6.1; UL 1581, Section 560; or NMX-J-191-ANCE.
发表于 2007-8-29 13:28 | 显示全部楼层
有沒有誰比較了解HPN線材的耐電弧測試的呢?說說吧!
发表于 2007-9-10 16:53 | 显示全部楼层
引用第53楼wangrang于2007-08-29 13:28发表的  :
0 y* X/ q% j' h3 |. z: h. N有沒有誰比較了解HPN線材的耐電弧測試的呢?說說吧!
参照UL62 第 5.2.5~5.2.6条.UL62-2006版第49页.~呵呵~$ R$ g& [5 a) @4 i2 N
5.2.5 Standard arcing test for Type HPN
" S, `! I* N0 H: g5.2.5.1 General
. v: N/ c* p8 W6 c2 iType HPN cord shall not arc when a specimen of finished cord is connected at one end to a 120 V (rms)
. k) S7 P, }9 T$ H8 fsource of supply through a 15 A fuse or circuit breaker and subjected to a standard test flame applied 13
  N& |" x$ k. q7 ?6 x8 \9 ^mm (0.5 in) from the other end of the specimen for 2 min. Compliance shall be determined in accordance4 [5 ~) U) p$ r% u1 ~' ?
with the method described in Clause 5.2.5.2; CSA C22.2 No. 0.3, Clause 4.28.12; or UL 1581, Section 1670.
' j0 c! ?& B* M4 m, l5 Q4 d5.2.5.2 Test method
- j- \7 i# I; I7 {9 b+ ^9 j) ]$ z) vThe specimen for test shall be of any suitable length. One end shall be cut off square, care being taken# i' E' ?% n5 ~  j: S5 y7 ^
that the conductor ends are flush with the cut end of the cord. The cord shall be laid across a$ A' A" E" p8 L8 g: R
nonconductive surface, the square cut end protruding approximately 0.1 m (4.0 in) beyond the surface$ b* Q8 D  F9 `# ~$ G$ H  E: s
edge. The opposite end shall be connected to the voltage source between the conductors of a# q, G  H& T+ j. X" J
two-conductor cord and between the circuit conductors joined together and the grounding conductor of a( t! |5 r- T9 s& x
three-conductor cord. Using a Tirrill, Bunsen, or similar appropriate gas burner, a standard test flame (as
2 x5 J$ T. O+ Q: o8 @0 R; ^" Kdescribed in Clause 5.1.5.1) shall be obtained. With its barrel vertical, the burner shall be placed under
$ H$ P$ f5 p5 {+ E3 jthe free end of the cord with the tip of the inner blue cone touching the flat underside of the specimen
/ _: I! w$ ^$ }midway between the conductors and 13 mm (0.5 in) from the square end for a 2 min period. The cord4 G/ X% T8 v( B* y1 N$ |9 e
does not comply if arcing occurs between the conductors during application of the flame or if the fuse or circuit breaker opens.
# p7 d$ ^; W" W/ Y$ x1 n7 n=======================
, e# Z* y8 J$ C9 z. X, H2 _5.2.6 Flex arcing test for Type HPN* p# }: N! B. n
===========================, b1 E* H* |( O1 @: [
5.2.6.2 Procedure
8 ?, h# j. |) |" I& K5 m" OThe procedure shall be as follows:~
发表于 2007-9-11 08:47 | 显示全部楼层
標準有看過,其實只是沒有看過具體的測試,有點抽象...
$ F" i" g# n! v3 L( O! S1 l  M" J6 j# Y, ?
呵呵,謝謝拉!
发表于 2007-9-11 11:20 | 显示全部楼层
我搞PVC电缆料,不知有什么可以帮上忙
 楼主| 发表于 2007-9-11 19:25 | 显示全部楼层
只要与UL电源线有关的测试疑问和经验,大家都可以在这里交流的!但是最重要的还是讨论实际测试方法和手段与标准的理解 !
发表于 2008-7-19 00:01 | 显示全部楼层
引用第43楼cableyzf于2007-08-10 14:31发表的  :
, b; m: @* q- \7 ~4 U' e# p对,是最小截面积(最小厚度乘以宽度),平时都没注意。虽然UL1581没说,我查了一下JIS有规定最小厚度(JIS要求至少要测五个值)乘以宽幅得出截面积。检测标准这部分真的是越抠越细,所以这部分的讨论太重要了。谢谢版主!

/ Y* X% {. T4 s  ?. [UL1581中有规定的:在标志线处,标志线内6MM及19MM处共测试4点取最小值--440.24 The thickness of the specimen is to be taken as the smallest of four measurements to 0.001 inchor 0.01 mm, two of which are to be made at 1/2-inch or 13-mm intervals between the bench marks on oneedge beginning 1/4 inch or 6 mm from either mark, with the other two measurements being made at corresponding points on the opposite edge.
发表于 2008-9-8 20:40 | 显示全部楼层
对于UL 可能是我最熟悉不过的,我们公司实验室申请的UL758,UL62,UL1581的目击测试已于2008年9月15日完成.是全球唯一一家可以做目击测试的公司.刚来公司,希望和大家交流交流.
发表于 2008-9-11 15:58 | 显示全部楼层
学习学习,我才作过两个电线的案子。
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