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3 Y# }) P* W( s* h6 n, o
"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." 3 f2 E/ A! G) E- p+ X. m! v& H 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* M% H- h( k$ P. m) n/ Q# ]* u' J
supporting current-carrying connections, and parts of non-metallic material within a distance4 Y. _* B! t; P2 x
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11." v7 v- s5 B% |
However, the glow-wire test is not carried out on parts of material classified as having a glowwire 6 `, |2 J4 J! [5 Rflammability index according to IEC 60695-2-12 of at least h/ S8 a% `. I1 Y( x– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation, 6 H: r( c/ g0 S: O4 {: u– 650 °C, for other connections. " D9 V- B/ M4 t* o6 KIf the glow-wire flammability index is not available for a sample with a thickness within2 ]% m5 ^3 j8 A% J) q# M
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest% }& U- l1 ^6 ~
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.4 f8 _! ~% S4 f
NOTE 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. h' Y7 q6 s/ c: j! V: X. b( q* r
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded b$ Y$ a) T+ e4 u: v2 u. ]% e9 _2 w1 Sfrom the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out 4 \" n( c/ L4 Z, l! `, W- H4 Q+ Eat the relevant temperature with the tip of the glow-wire applied to the interposed shielding7 y# ]7 S, t! u5 n
material with the shielded material in place and not directly to the shielded material. ! R1 W M3 H4 q2 J4 y. H* cWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are 3 `1 S+ d' \8 A4 C– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation, ) t% O% [0 |5 K0 d F$ Q. v– 650 °C, for other connections.! H) r+ B. R1 T
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' r7 ~% R' E3 Q' ?
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
