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| DSH 393
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: F( e, A, H( P0 d, z0 w/ j0 f+ b: R | Test of non-separable thin sheet material
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| 60065(ed.6)
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Standard(s):
2 R. c' o, t+ R' @IEC 60065:1998, 6th ed.# t1 |! J4 n* z& _0 I2 V
Sub clause(s):
3 ?4 ]/ f! h t ^% u" F& B" N2 O8.8
' f, u+ G6 D) b& h5 R' @Sheet No:( m) y0 B& f8 H8 X
3939 J2 K6 f c5 ]* C
Subject:
* Y3 c! r2 W2 T: x5 jTest of non-separable thin
( Y- M& w4 U" u. hsheet material
' @! | ~1 G& K, h( W* lKey words:1 q' y3 h( `- `# e! t4 {$ V) F/ m
- Thin sheet material
5 N$ |6 T# U+ _% o* g6 M7 h) \Decision taken at the 39th
1 l* t1 y5 F U$ g; J& smeeting 2002
x" @; Y; s4 y$ ?* ?Question:
. i: l# N# J9 ~; cCurrent technology is utilising non-separable thin sheet insulation within transformers for supplementary and6 f) s8 h( f) E H7 r* i
/or reinforced insulation. How should such non-separable insulation be assessed for suitability in these( ]. Q; a2 k, J" t! z, Z7 m$ D+ Q
applications?6 |; P$ }2 q& i$ Z: Y! }
Rationale: p* O* Z- Y: b0 l4 Z/ f Y, ~
There are non-separable thin sheet foils on the market used in wound components, which cannot be tested
0 x- e$ F* p& N$ ]0 Z, Gaccording to the requirements and test-method in the existing standard. The current published
9 J1 s4 T# j: {; D) urequirements in the standard do not adequately address the use on non-separable thin sheet insulation A
$ w' h2 u. w2 u/ i& U) Gproposal was made by TC92-WG1 on how this matter can be handled.4 r" o0 N0 e9 `9 D0 N) u- K
Decision:
: f+ @. o3 n6 gThe following proposal shall be used until the new edition is published.
6 R* Y; `/ v7 P& @The following amendment to the standard will be published to address this issue:3 M$ S" d3 q1 ~1 R. Y* K
add to clause 8.8 For requirements for non-separable thin sheet insulation in two or more layers, see 8.xx
4 i3 D0 O6 o# C0 G( l5 Cadd new clause 8.xx
- n9 {* o" r! }% M# C3 V$ e8.xx Requirements for non-separable thin sheet insulation in two or more layers
2 Q0 Z. C+ W0 [# k" d% `7 L! oThree separate test specimens of the sheet of 70 mm width shall be supplied by the manufacturer. The test
5 t, z. ]0 W/ |. j- w6 V$ Xis carried out by fixing a specimen on a mandrel made of steel, nickel plated, or brass with smooth surface8 W9 E" O# o/ \( y: Y
finish as shown in figure x. A metal foil (aluminium or copper) 0,035 mm ± 0,005 mm thick shall be placed
% N2 y9 k$ B7 A' I+ zclose to the surface of the specimen and submitted to a pull of 1 N. The metal foil shall be so positioned that
+ F$ `( \& i3 O8 ^5 w& R$ g4 [its edges are 20 mm away from the edge of the specimen and, when the mandrel is in its final position, it4 ?1 e* ~' Y% s+ r1 @. C6 m* N
covers the edges upon which the specimen is lying by at least 10 mm. The specimen is submitted to a pull
0 B6 `6 x, F- m( t* y, o5 Hof 150 N at its free end by an appropriate clamping device. The specimen shall be slowly rotated forwards: S4 c% r$ G' P$ n3 Z* r; [
and backwards three times by 230° without jerks. If the specimen breaks at the clamping device during the
' L) \+ o* [$ l4 G& h# lrotation, the test is repeated. If one or more specimens break at any other place, the test is not fulfilled.+ ?7 A6 u1 w) K0 |" }
While the mandrel is in its final position, within the minute following the final positioning, a test voltage of 1,5
5 Z$ J" P& ]0 [$ Ftimes the value specified in table 5 is applied, as described in 10.3.2, between the mandrel and the metal
' A7 z* l. F4 p4 Gfoil. No flashover or breakdown shall occur during the test, corona effects and similar phenomena being; y U& N2 \3 |
disregarded.
0 e8 {) B$ A5 U' ?4 e) X$ z$ a, Kadd new Figure x (Figure 6 of IEC 61558-1)
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