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| DSH 393
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| Test of non-separable thin sheet material: v7 y- }7 \+ J
| 8.8
- b% M5 v. N% x4 }- w3 ^ | 60065(ed.6)& D" m! q! P/ W
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" t' U# Q$ `: Z. u! p) tStandard(s):' e2 A+ D: F d
IEC 60065:1998, 6th ed.
: k, @# V! V- z, h1 z$ Y xSub clause(s):' v# @, ^7 G8 n$ c& I6 E
8.8
! T( H) z3 R" i+ U) ^Sheet No:- Z0 ]. K# c3 M( q
3932 A$ |( ?' e% J' o9 P; |
Subject:
# q+ |' p- v, @; K. i: d9 a# Q$ {$ DTest of non-separable thin
, \5 e% q! q) y* L. _2 w% p: Y: W* xsheet material' E G% N4 s$ M! x. a' |+ M) V# p$ i
Key words:, C9 Y. S$ ]9 o% `
- Thin sheet material
" o+ g5 c# Z' ]5 o& u3 XDecision taken at the 39th
7 \, @# p9 K7 A4 U: {meeting 2002
2 u3 o6 C3 |; }3 J, ?Question:
, O% F: m8 _/ T6 n3 ~$ E7 b- ACurrent technology is utilising non-separable thin sheet insulation within transformers for supplementary and# E g% X x2 k
/or reinforced insulation. How should such non-separable insulation be assessed for suitability in these: ]: M/ p& A! n8 }# O# P
applications?
) Q, i8 w1 U8 [* gRationale:* Y6 O; Q9 ]$ K* z
There are non-separable thin sheet foils on the market used in wound components, which cannot be tested
9 L: u/ ]' v2 `, e2 Caccording to the requirements and test-method in the existing standard. The current published$ Z7 p# Y0 b+ T g# v
requirements in the standard do not adequately address the use on non-separable thin sheet insulation A& A6 {" K* [, A: @1 L" V0 f* d
proposal was made by TC92-WG1 on how this matter can be handled.4 q( i9 v, o' N* G; h3 p$ `
Decision:
+ P b* ?3 W9 jThe following proposal shall be used until the new edition is published.
- m z) [0 U: v) O. y" uThe following amendment to the standard will be published to address this issue:( w( a7 Z% S6 z* _
add to clause 8.8 For requirements for non-separable thin sheet insulation in two or more layers, see 8.xx
+ | i2 E4 A* y# x. P0 tadd new clause 8.xx
# y/ T/ w+ g/ D+ K8.xx Requirements for non-separable thin sheet insulation in two or more layers
U2 n' I( {$ Z5 _$ J: {Three separate test specimens of the sheet of 70 mm width shall be supplied by the manufacturer. The test+ m6 m& u' {* w% E+ I
is carried out by fixing a specimen on a mandrel made of steel, nickel plated, or brass with smooth surface
5 i; W! C9 W) M4 Hfinish as shown in figure x. A metal foil (aluminium or copper) 0,035 mm ± 0,005 mm thick shall be placed
1 p* u. \" _4 t; b6 K% l0 tclose to the surface of the specimen and submitted to a pull of 1 N. The metal foil shall be so positioned that
9 U: O7 l: V# `' ]its edges are 20 mm away from the edge of the specimen and, when the mandrel is in its final position, it! g# \* J: @9 d3 Z" z3 M2 P
covers the edges upon which the specimen is lying by at least 10 mm. The specimen is submitted to a pull
3 E& g1 j8 [* P! Iof 150 N at its free end by an appropriate clamping device. The specimen shall be slowly rotated forwards
3 f, E! m* `8 s5 _# @/ band backwards three times by 230° without jerks. If the specimen breaks at the clamping device during the' U7 c7 X6 T- m$ H0 W: _- p/ K
rotation, the test is repeated. If one or more specimens break at any other place, the test is not fulfilled.
6 x. Z) w* @/ Z5 H. D* bWhile the mandrel is in its final position, within the minute following the final positioning, a test voltage of 1,5/ F0 l9 L; B! A9 q w
times the value specified in table 5 is applied, as described in 10.3.2, between the mandrel and the metal
+ P3 o, x1 n& P, K6 f! q$ _foil. No flashover or breakdown shall occur during the test, corona effects and similar phenomena being0 s7 O8 P0 s- Z( K `0 A6 m
disregarded.
2 x6 B) ?% M. w" ^5 J$ x1 badd new Figure x (Figure 6 of IEC 61558-1)
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