电工绝缘胶布作附加绝缘

yearl

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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。
请问这样可以吗？
如果不可以，违反了标准的哪些条款？

innochina

量产产品中，不应该使用电工胶布这种东西进行绝缘，
1 k  C# Q0 W7 Q  I3 Y* w- j1.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，
% i$ Y  Q# |( z' B+ U. h0 s: f3.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，

一行白鹭上青天

yearl 发表于 2013-5-5 11:16
两层薄层材料，每层都符合附加绝缘要求；
4 n- }0 [: U" X+ G& v* K- i6 H% ]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？
...

9 q. x" J5 }. y2 I& g( l9 i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？

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

Dan_Tan

以面两种情况OK
1， 加一层厚于1mm的套管
* T& G8 i% Q9 ^  t, a: ~$ E2，加两层可套管（每层需分别可通过电气强度测试）

% y  B1 e  j4 i3 z标准要求如下：
2 z, T- U9 y& ]2 b& R29.3 Supplementary insulation and reinforced insulation shall have adequate thickness,
or have a sufficient number of layers, to withstand the electrical stresses that can be expected
during the use of the appliance.
/ B: q% J5 j& C6 L" I, zCompliance is checked
" N. ^1 a7 U8 s  i% a– by measurement, in accordance with 29.3.1, or
– by an electric strength test in accordance with 29.3.2, if the insulation consists of more
& `, B6 w% G% o" |7 R. d% othan one separate layer, other than natural mica or similar flaky material, or
) _) Q& D' z- m0 C0 A+ j% ^( O8 {– by an assessment of the thermal quality of the material combined with an electric strength
3 w( z6 j4 N  w# Ytest, in accordance with 29.3.3 and for accessible parts of reinforced insulation
" q( H' ^* |, }( d1 pconsisting of a single layer, by measurement in accordance with 29.3.4, or
! b( _, B& G% [& r6 B– as specified in Subclause 6.3 of IEC 60664-4 for insulation that is subjected to any
$ }6 Y6 M, {2 n% Q) m  cperiodic voltage having a frequency that exceeds 30 kHz.
# E3 h2 `# |$ }  u8 t5 |29.3.1 The thickness of the insulation shall be at least
& |% {5 w9 H. F– 1 mm for supplementary insulation;
. j- d8 J; d" X6 _6 _* N– 2 mm for reinforced insulation.
2 M; x3 ^4 C1 P; S$ F29.3.2 Each layer of material shall withstand the electric strength test of 16.3 for
supplementary insulation. Supplementary insulation shall consist of at least 2 layers of
/ a3 e1 Q- ]7 @& A* Omaterial 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
9 I4 {0 ]$ g! _) v& oClause 19. At the end of the period, the insulation is subjected to the electric strength test of
' O6 m9 b- R6 `( u2 N16.3 at the conditioning temperature and also after it has cooled down to room temperature.
$ u  |( I  s3 w( U) s# p6 J. AIf the temperature rise of the insulation measured during the tests of Clause 19 does not
% C9 b6 @' C" @( g5 m8 O, O4 Cexceed the value specified in Table 3, the test of IEC 60068-2-2 is not carried out.
) L( I/ s9 X! T/ H8 d/ i

yearl

5 s7 T7 o0 Z8 f0 G( p9 z7 G  D
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？
隔着外壳，不应判为可拆卸部件；
0 B0 {+ @  C% z$ s$ G第19章试验时温升值不超过表3，不必进行干热试验。
9 R2 C0 m& h- N6 [所以我找不出不可以使用的依据。

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？