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| DSH 542* @1 n- J$ z# m) r& W9 Q5 |; v
| Application of Annex U and 2.10.8 to spirally wound insulation required to be treated as a cemented ...4 b: J6 B# p9 `$ E+ |2 f `7 I8 K
| 2.10.5.4, Third paragraph9 `" h3 D; l# E5 a% Y
| 60950-1(ed.1)! W, x5 m8 s) I+ {- c6 ?! m6 n
| 0 D4 h, u) I: F
Standard:
" f- V/ ^& B! k! D- CIEC 60950-1, ed. 1
: Q+ G/ @5 s; v6 r8 aSub clause:9 l9 G" t& I9 \9 a: ?" x& b! C4 g+ d
2.10.5.4, Third paragraph; d+ A+ k* ~2 g/ g2 k6 T8 v- E
Dec. No.$ G* x% P* b, `( i! N- B e. N! M
DSH-5424 {- `, k, {4 U+ r( s; J
Subject:! L( v3 O: H5 X1 F. Z8 e
Application of Annex U and 2.10.8 to7 H3 r6 H+ E; C9 X* ?
spirally wound insulation required to be
! b. J4 x" s& m9 L8 {treated as a cemented joint/ t) a* r* K& I5 j% k. q
Key words:
5 ~/ _+ K' b( U: C* m. R9 r' Kspirally wound insulation;% a: Z9 o* @( D& T* |! T. W# y
cemented joints;
% ^! O8 O: g6 K( }; X5 }/ `0 P/ |: C; fAnnex U.2
, h, Y; O) {0 iDecision of:5 s- w+ {6 C/ c1 p
40th CTL meeting /2003
5 M2 q( K& N/ G1 }Question:
$ o8 }+ [( M: g- l# UWhen applying the 3rd paragraph of 2.10.5.4, what is the intent of the requirement for spirally wrapped
( R+ L( J4 C* q6 O. H& S. ^% Vinsulation (tape) when the CLEARANCES and CREEPAGE DISTANCES between layers, as wrapped, are( d2 V! m C% y
less than the required minimum value for Pollution Degree 1?
3 T% F i9 j ?* B. [Decision:( J0 ~4 p/ b, N
The intent is, if the CLEARANCES or the CREEPAGE DISTANCES between layers, as wrapped, are less than# k. I1 B6 @3 }* x: |3 \
the required minimum value for Pollution Degree 1, the spirally wrapped insulation should be sealed and pass: }& \% F- n5 v( `. e* H
the tests of both:0 M, u$ y: |. D& |& D" O
· Annex U, which requires an electric strength test per Annex U.2 at the voltage specified in U.2;
9 d% s/ O* u; @+ c7 P/ K5 rand
- b- Q# H$ Y, G& a· 2.10.8, which requires an electric strength test of 1.6 times the values in 5.2.2 after the testing in 2.10.8.( S* L% [ B! T8 Z; t1 P7 \
( `; Z- t0 v6 o- b. x2 z; d5 V6 |) C( f1 n7 i
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