电工绝缘胶布作附加绝缘

yearl

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

II类器具，通过外壳的开口，试验指触及到了带电部件的基本绝缘。
现在想用两层电工绝缘胶布缠绕在基本绝缘上作为附加绝缘。
/ e( [$ r3 w% i1 b9 o: @0 S: H请问这样可以吗？
如果不可以，违反了标准的哪些条款？

hgf397556998

个人认为，需要符合绝缘耐热，绝缘就是附加绝缘的耐压试验，耐热应当没问题，如果有认证自然更好，但是29章貌似对附加绝缘有厚度要求，你的绝缘胶布行吗？

yearl

两层薄层材料，每层都符合附加绝缘要求；
+ i# F5 j- ~6 A8 t" i: L虽然厚度小于1mm，但是隔着外壳，有必要进行21.2的刮擦试验吗？
隔着外壳，不应判为可拆卸部件；
第19章试验时温升值不超过表3，不必进行干热试验。
5 V6 k: ?# k: s所以我找不出不可以使用的依据。

Dan_Tan

以面两种情况OK
$ o# ~; J4 B8 U9 e$ p0 Y+ P1， 加一层厚于1mm的套管
7 E4 ]( _7 v/ s2，加两层可套管（每层需分别可通过电气强度测试）

标准要求如下：
3 o( H# X8 i6 l' {0 [29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
$ X/ n1 R' o/ _. v: for have a sufficient number of layers, to withstand the electrical stresses that can be expected
during the use of the appliance.
Compliance is checked
– by measurement, in accordance with 29.3.1, or
7 K$ ^6 Z( x2 V– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
than one separate layer, other than natural mica or similar flaky material, or
9 U! T$ y" X' h; e& C% |– by an assessment of the thermal quality of the material combined with an electric strength
test, in accordance with 29.3.3 and for accessible parts of reinforced insulation
consisting of a single layer, by measurement in accordance with 29.3.4, or
– as specified in Subclause 6.3 of IEC 60664-4 for insulation that is subjected to any
' g5 d& C2 t  G' |periodic voltage having a frequency that exceeds 30 kHz.
5 X; G* G: x% @9 s5 J29.3.1 The thickness of the insulation shall be at least
0 V9 b. l' @/ x– 1 mm for supplementary insulation;
* i2 Y  g7 g% V& K; h' L: k– 2 mm for reinforced insulation.
29.3.2 Each layer of material shall withstand the electric strength test of 16.3 for
9 w1 X4 @1 M( |. x8 wsupplementary insulation. Supplementary insulation shall consist of at least 2 layers of
material and reinforced insulation of at least 3 layers.
29.3.3 The insulation is subjected to the dry heat test Bb of IEC 60068-2-2 for 48 h at a
temperature of 50 K in excess of the maximum temperature rise measured during the test of
Clause 19. At the end of the period, the insulation is subjected to the electric strength test of
6 {! e. T; b$ S( A# r' v( T16.3 at the conditioning temperature and also after it has cooled down to room temperature.
$ t' T: g5 B: O# q& w+ VIf the temperature rise of the insulation measured during the tests of Clause 19 does not
exceed the value specified in Table 3, the test of IEC 60068-2-2 is not carried out.
$ C, r1 V# A4 w( J- {
% a$ s2 M. J6 K0 ~/ e; h

winson1982

要是符合绝缘要求的话个人觉得应该可以的，但一定要可靠固定，比如加根扎带

一行白鹭上青天

yearl 发表于 2013-5-5 11:16
4 W5 h& o8 p8 }5 [) l' f  g/ R$ I+ |两层薄层材料，每层都符合附加绝缘要求；
虽然厚度小于1mm，但是隔着外壳，有必要进行21.2的刮擦试验吗？
...

) a! Z2 O; _$ r! |2 D我最近也在找这个问题，找不到理由不能用，但又觉得不合适。请问前辈您当时是怎么解决的？

innochina

量产产品中，不应该使用电工胶布这种东西进行绝缘，
3 F0 t% d! Z# O- e" L1.因为用胶是不可靠的固定方式，
2.你无法控制胶带缠绕的总厚度，
3.改小开口挡住试验指，或者安装挡柱试验指的零件不碰到带电部分，