关于灼热丝的知识,连接件3mm范围是怎么理解的

lds08080808 · 发表于 2009-6-5 22:39

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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.

大侠风清扬 · 发表于 2009-6-5 23:11

3mm为穿透距离
"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."
这个哪里来的？以标准为依据

shixiafeng · 发表于 2009-6-9 23:06

同意二楼的说法

lds08080808 · 发表于 2009-6-9 23:34

CL.30..2..2

kendy · 发表于 2009-6-10 08:34

30.2.2 For appliances that are operated while attended, parts of non-metallic material
supporting current-carrying connections, and parts of non-metallic material within a distance
of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11.
However, the glow-wire test is not carried out on parts of material classified as having a glowwire
flammability index according to IEC 60695-2-12 of at least
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
– 650 °C, for other connections.
If the glow-wire flammability index is not available for a sample with a thickness within
± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest
preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.
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.
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded
from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out
at the relevant temperature with the tip of the glow-wire applied to the interposed shielding
material with the shielded material in place and not directly to the shielded material.
When the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,
– 650 °C, for other connections.
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。

lds08080808 · 发表于 2009-6-10 21:36

那850的还做吗

lds08080808 · 发表于 2009-6-10 21:39

请问下IEC60695是什么标准的,我看的是IEC60335

obstinate · 发表于 2009-6-10 22:56

IEC 60335是告诉你什么时候做材料测试
IEC 60695是告诉你怎么做材料测试

lds08080808 · 发表于 2009-6-12 22:35

顶上去再钩个高手

lds08080808 · 发表于 2009-6-20 22:02

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