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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  :% ~6 }, Q1 Z3 M- _
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;, P4 }. X- |! L* r
例如--UL62规定:4 n- P  d$ f6 }/ u+ d
NMX-J-191
9 ]$ @$ }# j) L7 M, pHeat Deformation of Semiconductive Shielding, Insulations and Protective Coverings of Electrical
" `% g4 F6 ?/ I# w! zConductors – Test Method( U& n1 J+ l6 ^; M* U

* `# M: P# t6 f0 c5.1.3 Deformation2 W1 R6 x% V( |, `7 |
5.1.3.1 Insulation* E( e" f; }. [! a" s, [
The insulation on single-conductor wires, and on the individual conductors (separated, in the case of( s- g9 F& j. Y& ^) u' U
parallel cords), shall not decrease by more than 50% in thickness when subjected to a force caused by a
/ t0 c( N& p7 Z. `) L( N' i& Cmass as shown in Table 40, and while maintained at the temperature shown in Table 40 for 1 h.
# d8 z3 H% P" p, a1 Y" ]5.1.3.2 Jacket
0 d8 B! n/ v" g* X; w6 F, VSmoothed specimens of jackets from finished cords and cables shall not decrease by more than 50% in
$ E9 C: f/ w9 N' Fthickness when subjected to a force caused by a mass of 2000 g, and while maintained at the temperature
$ I3 d  L  x) G! b3 b! D$ Tshown in Table 40 for 1 h.
( i" b& T$ J* r5.1.3.3 Method
# x1 L' _2 W9 q& Y3 pCompliance with Clauses 5.1.3.1 and 5.1.3.2 shall be determined in accordance with the method( I( `; W2 H1 s1 Q9 C" T3 T
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  :
( P+ L5 }) K. u8 b. g/ 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~0 W8 o+ x" I5 i2 V  E9 c) ?
5.2.5 Standard arcing test for Type HPN
7 L+ L4 \3 L' `, |/ b5.2.5.1 General
( e% y7 a' Q7 D0 K2 nType HPN cord shall not arc when a specimen of finished cord is connected at one end to a 120 V (rms)+ s6 I5 }; H; M, s/ L! j* X
source of supply through a 15 A fuse or circuit breaker and subjected to a standard test flame applied 13
! f$ Z+ l$ f8 B' P9 T2 g, ?mm (0.5 in) from the other end of the specimen for 2 min. Compliance shall be determined in accordance9 b4 k! t) G$ a+ d
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.
( M- i  V( o5 [5.2.5.2 Test method% k7 M1 l1 }; E  w8 B! t( F
The specimen for test shall be of any suitable length. One end shall be cut off square, care being taken6 w' [9 k3 p9 k5 q( |0 U, P/ N
that the conductor ends are flush with the cut end of the cord. The cord shall be laid across a
: F- H! @+ x  i7 dnonconductive surface, the square cut end protruding approximately 0.1 m (4.0 in) beyond the surface
* h/ p# x7 U& K+ T  xedge. The opposite end shall be connected to the voltage source between the conductors of a" ~: Y7 j- D$ W) p" g2 G
two-conductor cord and between the circuit conductors joined together and the grounding conductor of a
0 m+ |# Q7 s: Tthree-conductor cord. Using a Tirrill, Bunsen, or similar appropriate gas burner, a standard test flame (as( H8 s+ I: y- P5 x
described in Clause 5.1.5.1) shall be obtained. With its barrel vertical, the burner shall be placed under% G$ Q% g1 Q. N2 _9 e6 F, V
the free end of the cord with the tip of the inner blue cone touching the flat underside of the specimen$ l  p/ |! ^$ T/ d2 I! m5 Z
midway between the conductors and 13 mm (0.5 in) from the square end for a 2 min period. The cord7 ]& a; s' e  r' k' n, Z
does not comply if arcing occurs between the conductors during application of the flame or if the fuse or circuit breaker opens.5 N( {% D& \0 J, T1 u
=======================
+ z* M' }, G7 O! ]: E+ K$ z/ H5.2.6 Flex arcing test for Type HPN
5 V$ Y" O4 V& f0 g% |===========================
' X6 i. {; o0 T! w7 y/ Q5.2.6.2 Procedure2 W9 A2 u, k! J2 P
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...) P  j2 G" v' \! ]* r- w
; m. t% [0 @+ l0 \
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 S1 G) q. K9 X4 K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!
; g7 @$ w& u4 {! w' o9 j6 R
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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