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。
请问这样可以吗？
& k6 I* ~6 c8 _) K; B% d如果不可以，违反了标准的哪些条款？
9 t. x  [$ G5 Z/ Y8 B* u" Y

innochina

量产产品中，不应该使用电工胶布这种东西进行绝缘，
$ v8 |6 w( ]# c: T4 e1.因为用胶是不可靠的固定方式，
! `. D3 b3 H2 J" Y# j5 ~4 {! a2.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，

一行白鹭上青天

yearl 发表于 2013-5-5 11:16
" v# Y" @' g1 H0 T两层薄层材料，每层都符合附加绝缘要求；
' @3 I# j' P2 @: m# r% }1 t2 T7 g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？
...

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
  _+ c* B% a0 Q6 i2，加两层可套管（每层需分别可通过电气强度测试）

- \8 ~8 S& K$ T; v4 T; ~, A标准要求如下：
29.3 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
% @) u" t0 e. I; C" Sduring the use of the appliance.
Compliance is checked
  V% C+ l" ^, _$ [' _– by measurement, in accordance with 29.3.1, or
3 S3 m' E, j$ k. r: ]) O– 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
8 Q  r# v5 e- h– by an assessment of the thermal quality of the material combined with an electric strength
& r, _, [6 n. ^1 _! Ktest, 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
) P- I" Y2 ^; l2 z! N3 Eperiodic voltage having a frequency that exceeds 30 kHz.
29.3.1 The thickness of the insulation shall be at least
% e6 ]( U8 K  o1 \$ p' r– 1 mm for supplementary insulation;
– 2 mm for reinforced insulation.
29.3.2 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
0 H  E% O) t" W; }( Y) N' Fmaterial and reinforced insulation of at least 3 layers.
: g- ?; V) Y& j5 S/ \* C29.3.3 The insulation is subjected to the dry heat test Bb of IEC 60068-2-2 for 48 h at a
% g8 `9 B% k/ g3 P! s; Stemperature of 50 K in excess of the maximum temperature rise measured during the test of
3 Y6 n+ B9 I" P2 D+ kClause 19. At the end of the period, the insulation is subjected to the electric strength test of
16.3 at the conditioning temperature and also after it has cooled down to room temperature.
- i! r5 `$ z$ t, QIf the temperature rise of the insulation measured during the tests of Clause 19 does not
# g) J$ S4 e, o- H1 `0 sexceed the value specified in Table 3, the test of IEC 60068-2-2 is not carried out.

yearl

9 e( o* c. `9 ^% U" L* v
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？
5 ~) B9 ~( I2 J0 u% z4 e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。
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？