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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  :- k3 s2 X6 E- s' n0 r
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;& P- B! F( E1 R
例如--UL62规定:
$ ]! S7 v% x" gNMX-J-191, D# d, c) S9 |: u- R
Heat Deformation of Semiconductive Shielding, Insulations and Protective Coverings of Electrical% ^1 K1 o3 n9 J9 X" X. M  N
Conductors – Test Method
* R# k- C% V0 |) ]8 \" M# r
3 m' C& A3 |1 H5.1.3 Deformation
" [0 N3 f' X/ W8 _  k9 Y1 w* k5.1.3.1 Insulation+ t8 @; J8 Y! i7 M# F) B
The insulation on single-conductor wires, and on the individual conductors (separated, in the case of1 d0 m) H" O; g
parallel cords), shall not decrease by more than 50% in thickness when subjected to a force caused by a' f* ~' b1 ~5 s: m
mass as shown in Table 40, and while maintained at the temperature shown in Table 40 for 1 h.
0 Z! Y" J5 U0 N5.1.3.2 Jacket
7 p0 q3 V. f1 R9 B6 T8 `Smoothed specimens of jackets from finished cords and cables shall not decrease by more than 50% in3 x4 }3 B$ v* ?' ]* y
thickness when subjected to a force caused by a mass of 2000 g, and while maintained at the temperature
7 W; [) H2 ~. ?4 r' f2 Z5 ashown in Table 40 for 1 h.
) T. k' o4 q' T& b- S5.1.3.3 Method
2 [! E3 O- u8 gCompliance with Clauses 5.1.3.1 and 5.1.3.2 shall be determined in accordance with the method
8 e- \3 N3 ~0 o  `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  :
! g) `, Q" ]. J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- U7 w& }5 W) j
5.2.5 Standard arcing test for Type HPN& S$ x8 `0 r. P  {5 i
5.2.5.1 General
. P/ J8 k0 g8 ^1 {/ _, jType HPN cord shall not arc when a specimen of finished cord is connected at one end to a 120 V (rms)) M4 t! B/ ^. Y/ `7 D9 Q
source of supply through a 15 A fuse or circuit breaker and subjected to a standard test flame applied 13
5 H7 p2 L; T" Smm (0.5 in) from the other end of the specimen for 2 min. Compliance shall be determined in accordance
1 }! H8 _- H. U) Lwith the method described in Clause 5.2.5.2; CSA C22.2 No. 0.3, Clause 4.28.12; or UL 1581, Section 1670.
. b2 h* a) F. {, o! ?5.2.5.2 Test method8 X+ I. {  j& t
The specimen for test shall be of any suitable length. One end shall be cut off square, care being taken
# D/ L+ }! g' {- H8 w7 lthat the conductor ends are flush with the cut end of the cord. The cord shall be laid across a- t; n7 M5 w9 L% q% ^3 e, s0 `9 w
nonconductive surface, the square cut end protruding approximately 0.1 m (4.0 in) beyond the surface0 B% h6 F: U, T+ G
edge. The opposite end shall be connected to the voltage source between the conductors of a* i$ F1 Y7 e7 h% S/ }6 A+ J! g( @
two-conductor cord and between the circuit conductors joined together and the grounding conductor of a
0 _7 i3 r; U& c7 {three-conductor cord. Using a Tirrill, Bunsen, or similar appropriate gas burner, a standard test flame (as
# {# x; a$ Z; x1 gdescribed in Clause 5.1.5.1) shall be obtained. With its barrel vertical, the burner shall be placed under0 A3 S+ L/ |, r; k
the free end of the cord with the tip of the inner blue cone touching the flat underside of the specimen1 `4 f! x: Q( X2 \/ i
midway between the conductors and 13 mm (0.5 in) from the square end for a 2 min period. The cord
/ f" {% _% A- }! D) B# T' tdoes not comply if arcing occurs between the conductors during application of the flame or if the fuse or circuit breaker opens.) {# N0 C7 w: p; K% l) u5 N1 A
=======================
1 t0 U$ D5 E  P# _) Y5.2.6 Flex arcing test for Type HPN
2 u$ C0 A+ w$ W5 }, u1 I===========================
+ l% O5 i" P* a! O: ?" W3 S5 |5.2.6.2 Procedure
$ y8 i3 O) {$ W. i- V# Y8 VThe 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...# G  b6 B  R1 s1 T% `3 C- d0 K6 b; K

; Y3 Q( ?3 x8 F) r) @( S/ ~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  :7 j2 i% A) {& Q8 R0 P6 f
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!
9 e9 \( }# ?' {0 P2 J; _( L
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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