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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  :
$ y) v/ Y7 ], O  N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;& l2 p' e7 Y+ H  F
例如--UL62规定:+ o& `& A% o  r, P/ i$ D! ~! I
NMX-J-191
" S- p1 w3 w) _$ f. g6 c$ V4 w- kHeat Deformation of Semiconductive Shielding, Insulations and Protective Coverings of Electrical8 q, {( x/ f' a
Conductors – Test Method
! W: `, ]) t7 R! o0 W- {4 D% H( R% Y, j- f5 ?5 e/ a/ v
5.1.3 Deformation
+ f" a6 f' S& W5.1.3.1 Insulation
1 h9 v  |2 L  O. N. FThe insulation on single-conductor wires, and on the individual conductors (separated, in the case of
, d" d1 v# P: i5 Sparallel cords), shall not decrease by more than 50% in thickness when subjected to a force caused by a
* }$ }# w9 S/ T1 w5 gmass as shown in Table 40, and while maintained at the temperature shown in Table 40 for 1 h.
* ]6 l3 y" u' h! E1 u5.1.3.2 Jacket
. m* h' S3 S% a3 _Smoothed specimens of jackets from finished cords and cables shall not decrease by more than 50% in8 M+ [* N% N* {$ W" A6 @
thickness when subjected to a force caused by a mass of 2000 g, and while maintained at the temperature7 Q( j' O# q; k/ `
shown in Table 40 for 1 h.
3 r8 ]$ i9 _  P+ S; \: G0 R' q; K/ f5 A5.1.3.3 Method
. `" Q4 {- Y0 ?% \) I5 xCompliance with Clauses 5.1.3.1 and 5.1.3.2 shall be determined in accordance with the method: {8 N# K! f2 G# {( ~
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  :, C7 [# b5 [9 O& t1 t
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~" F. ?3 f) y$ d
5.2.5 Standard arcing test for Type HPN
6 ?: m" V' L# h$ v7 _5.2.5.1 General" A' g1 l. B! n( g( m, ^/ Z+ i
Type HPN cord shall not arc when a specimen of finished cord is connected at one end to a 120 V (rms)
: G- S) S- J6 h, a: G7 H* |source of supply through a 15 A fuse or circuit breaker and subjected to a standard test flame applied 13, A" \2 P; e: F" ]2 y
mm (0.5 in) from the other end of the specimen for 2 min. Compliance shall be determined in accordance4 ]) d& F* h. G% V" ?. P
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.
0 o2 j' x. P/ ?& r& }5.2.5.2 Test method
2 Q6 D+ n) b. }4 y+ P3 iThe specimen for test shall be of any suitable length. One end shall be cut off square, care being taken
. N( ^6 y7 f  P4 F" M: d5 |7 fthat the conductor ends are flush with the cut end of the cord. The cord shall be laid across a9 z& m/ V) g/ T+ Z
nonconductive surface, the square cut end protruding approximately 0.1 m (4.0 in) beyond the surface2 o  T- Y: ]# O4 U( R
edge. The opposite end shall be connected to the voltage source between the conductors of a! C- y1 z) r$ v/ F& g
two-conductor cord and between the circuit conductors joined together and the grounding conductor of a
' ^5 H2 z3 ~. O4 L' kthree-conductor cord. Using a Tirrill, Bunsen, or similar appropriate gas burner, a standard test flame (as
. g5 U  L4 Q' ]  k  p  \( B( Odescribed in Clause 5.1.5.1) shall be obtained. With its barrel vertical, the burner shall be placed under; m! d: d% F9 P
the free end of the cord with the tip of the inner blue cone touching the flat underside of the specimen
( c# I9 w- e$ @, N' B0 Ymidway between the conductors and 13 mm (0.5 in) from the square end for a 2 min period. The cord
# X' t& t  i% a1 o, v7 Tdoes not comply if arcing occurs between the conductors during application of the flame or if the fuse or circuit breaker opens.7 y9 D7 M7 [6 B, u
=======================
7 v  V( s7 D+ V& l& Y6 W- W  D5.2.6 Flex arcing test for Type HPN0 Q) h! ]' \+ v. G' S+ }' ]4 f
===========================+ L$ t6 R8 N! [
5.2.6.2 Procedure  \  ~# ^) a, u" ?% I- M* T1 u7 c
The 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...1 J& L& x9 Z) Q: m  {! v2 {3 }. m

9 H7 j, ^3 B/ S' D$ m, M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  :
) `4 J8 X+ y( t1 O- 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!
* \$ m$ Z! z8 @; N2 s7 N* J
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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