标题: 关于灼热丝的知识,连接件3mm范围是怎么理解的 [打印本页] 作者: lds08080808 时间: 2009-6-5 22:39 标题: 关于灼热丝的知识,连接件3mm范围是怎么理解的 CL.30,说连接件3mm范围内都要做灼热丝,但是在连接件和绝缘材料之间加了挡板,那3MM还要考虑吗?如果还要考虑,那为什么中间加了挡板(防火材料),那就不用考虑做750灼丝了.作者: 大侠风清扬 时间: 2009-6-5 23:11
3mm为穿透距离 # w3 q5 q. I9 o1 _"如果还要考虑,那为什么中间加了挡板(防火材料),那就不用考虑做750灼丝了."& d8 Y1 ]8 w `/ O# s
这个哪里来的？以标准为依据作者: shixiafeng 时间: 2009-6-9 23:06
同意二楼的说法作者: lds08080808 时间: 2009-6-9 23:34
CL.30..2..2作者: kendy 时间: 2009-6-10 08:34
30.2.2 For appliances that are operated while attended, parts of non-metallic material R2 _0 L4 D9 n' y
supporting current-carrying connections, and parts of non-metallic material within a distance ) ]5 x6 g8 D, W+ x' g5 C' @of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11.$ g7 |0 z- @+ F
However, the glow-wire test is not carried out on parts of material classified as having a glowwire ) a' t3 h0 z# @5 I5 ?1 F' V0 aflammability index according to IEC 60695-2-12 of at least% ~0 ]% D7 ~9 I% u7 p
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,' D! X# T+ R8 T4 U: x5 L. V" @
– 650 °C, for other connections." S( u* G2 e- U/ P& ~9 K p
If the glow-wire flammability index is not available for a sample with a thickness within9 ?- X1 J& v6 q! V+ @
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest # B2 m! w; M8 Ppreferred value specified in IEC 60695-2-12 that is no thicker than the relevant part. . _' t; }, G A. u7 \3 o: z" dNOTE 1 The preferred values in IEC 60695-2-12 are 0,75 mm ± 0,1 mm, 1,5 mm ± 0,1 mm and 3,0 mm ± 0,2 mm. 4 p1 d4 g- G7 ^# ?5 v! `Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded ! W- I! \! S" A5 ~; |" kfrom the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out 6 y$ x- C* v& F: W1 O3 \at the relevant temperature with the tip of the glow-wire applied to the interposed shielding $ M# m& E: c. }3 i5 O) v: bmaterial with the shielded material in place and not directly to the shielded material. - t# ?9 Y% _% L- f: WWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are , J* ^0 S0 q6 O* ]! g1 E! y$ G1 p– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,) O5 V* w8 U8 ?8 u( q/ N
– 650 °C, for other connections. ) E) f1 J" i* |; W0 l8 [" i如果中间挡板能经受住同等温度的灼热丝测试，则不需要对零件3mm内挡板以外的非金属材料进行灼热丝测试，因为就算电弧导致起火，经过挡板隔离后是则不认为可以蔓延至外部零件的，故不需要对其外部零件进行测试。作者: lds08080808 时间: 2009-6-10 21:36
那850的还做吗作者: lds08080808 时间: 2009-6-10 21:39
请问下IEC60695是什么标准的,我看的是IEC60335作者: obstinate 时间: 2009-6-10 22:56
IEC 60335是告诉你什么时候做材料测试( o1 K2 c4 |! |
IEC 60695是告诉你怎么做材料测试作者: lds08080808 时间: 2009-6-12 22:35
顶上去再钩个高手作者: lds08080808 时间: 2009-6-20 22:02
