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|  DSH 393, y& _) Q* }; ?% m: a5 O+ b
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| Test of non-separable thin sheet material
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| 60065(ed.6)
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Standard(s):: V" k: q( k$ A& }3 a& z0 o, Y
IEC 60065:1998, 6th ed.
' K2 z8 w/ d8 ?3 m8 U( i, ZSub clause(s):+ N6 l7 S+ L% W/ E8 i5 w$ q5 f
8.8( Q, O1 l- J$ X5 W) P5 l
Sheet No:! `! G$ r2 M6 m3 L$ e9 y
393- N) O: P5 ?* M9 M7 ?% a0 J) m/ Z
Subject:3 x6 x. M$ F: E/ V' i) H" E
Test of non-separable thin
$ R0 p- c- Q/ @sheet material" ?" H3 i% F" I F* {0 \
Key words:
, T0 f q5 I2 W. C; p- Thin sheet material
6 z: N( O0 a$ EDecision taken at the 39th, c6 B- o4 L2 a" h; z V
meeting 2002
4 u n* k2 B" WQuestion:' G+ {" v1 x* |7 j
Current technology is utilising non-separable thin sheet insulation within transformers for supplementary and0 q% b- R# W% S' C: G
/or reinforced insulation. How should such non-separable insulation be assessed for suitability in these4 q( e7 o* Y3 Z ^9 Z. A8 U
applications?) h$ U# {0 s) }! F e. S! ~0 i" L& |# P
Rationale:" M6 T! X7 R7 y+ N) B; `
There are non-separable thin sheet foils on the market used in wound components, which cannot be tested( G V, w9 m$ k: I, ^% ?+ v0 e
according to the requirements and test-method in the existing standard. The current published$ g2 f+ z/ M+ `5 H1 e. [
requirements in the standard do not adequately address the use on non-separable thin sheet insulation A8 j' B" C5 G r: M, m
proposal was made by TC92-WG1 on how this matter can be handled.
4 D4 k; P$ m) l5 C+ `& u. }Decision:
; C ~% q, O {8 ~: D5 w; sThe following proposal shall be used until the new edition is published.
, u& j! _, E% W5 KThe following amendment to the standard will be published to address this issue:
3 t2 \6 b5 q% c# radd to clause 8.8 For requirements for non-separable thin sheet insulation in two or more layers, see 8.xx8 ]5 i$ O0 u) `+ [" ^
add new clause 8.xx2 T) `4 P9 f% [- |. H6 A, W: z
8.xx Requirements for non-separable thin sheet insulation in two or more layers
" g( A- s& e, x; E' |. o$ _Three separate test specimens of the sheet of 70 mm width shall be supplied by the manufacturer. The test
, [( X# l( n: ~1 g, D+ C( y+ y& ]is carried out by fixing a specimen on a mandrel made of steel, nickel plated, or brass with smooth surface9 J! f1 Y0 u" L) K5 J3 X# t
finish as shown in figure x. A metal foil (aluminium or copper) 0,035 mm ± 0,005 mm thick shall be placed3 L) j- \9 K! r/ s( c, B
close to the surface of the specimen and submitted to a pull of 1 N. The metal foil shall be so positioned that: i# O2 b( J' w+ K! i3 M/ s
its edges are 20 mm away from the edge of the specimen and, when the mandrel is in its final position, it
# G2 V! O5 c1 j( o7 rcovers the edges upon which the specimen is lying by at least 10 mm. The specimen is submitted to a pull% z9 G) u2 _% T& c) q* b- W
of 150 N at its free end by an appropriate clamping device. The specimen shall be slowly rotated forwards
; k M$ [! O: O/ kand backwards three times by 230° without jerks. If the specimen breaks at the clamping device during the0 J! X1 [$ x4 F# t. x: H0 A, H
rotation, the test is repeated. If one or more specimens break at any other place, the test is not fulfilled.6 Q4 { I2 v) ?1 e$ K0 l
While the mandrel is in its final position, within the minute following the final positioning, a test voltage of 1,5
x- c/ A7 K: t- mtimes the value specified in table 5 is applied, as described in 10.3.2, between the mandrel and the metal
. ]% K6 i& Q' J& S& a7 `# F6 n' Hfoil. No flashover or breakdown shall occur during the test, corona effects and similar phenomena being6 c. U8 H1 {3 M5 O. p: R5 ]8 L
disregarded.
: @! ?) Y/ r" h1 S( Tadd new Figure x (Figure 6 of IEC 61558-1)
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