PDSH 1023 Dust test for IP 5X and 6X as described in the transformer standard

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PDSH 1023 ' T- s9 ~% y( L4 ^

Dust test for IP 5X and 6X as described in the transformer standard

17.1.1C, 13.4 6 \& m# H  \$ q/ ?: [8 m: r+ A# K2 w

61558-1(ed.1);am1 & 61558-1(ed.2);am1 & 60529 all editions ' e6 }) x/ B$ @( K

, H% p9 n1 v' w/ f* N7 w% IStandard(s):
IEC 61558-1
IEC 60529
All editions
# ?- v$ f) V3 t6 T$ u4 ?) i& lSubclause(s):
+ x! f/ l$ F8 L  z$ y+ ^7 w17.1.1C
, h0 F6 f6 S7 @4 D% Q13.4
9 [, v; O8 I, a. B# KNo. Year
PDSH
; S! k: G- m2 S$ v+ x1 Q& H1023 2010
$ g  p8 D. M0 U( Q/ w# _1 X: N$ t5 SCategory: SAFE Developed by: ETF5
OSM/LUM
( Y' }! x9 Z( ]% @! y/ rSubject:
7 w- b8 {$ d4 C" [' t2 k8 F  CDust test for IP 5X and 6X as
described in the transformer
3 U: z6 m  `7 Q5 t" lstandard
, D; Z: e. r" A! i. \: {Key words:
% a$ H8 G2 F, ^4 y' l- Transformers
' Y8 v5 W( k6 @1 b; n- Dust test
9 q( r0 d- E2 v8 H2 G* e- IEC 60529
To be approved at the 49th
CTL Plenary Meeting, in 2012
Question:
In the horizontal safety function standard for degree of protection provided by enclosures (IP code), IEC
60529, a description of the dust is given in subclause 13.4. However, in the transformer standard the
description of the dust divagate a bit as the following wording is added: “and shall have a range of particle
% l$ L  q7 a$ ~5 n2 x7 |* T/ Ksize down to and including 1 μm with at least 50% by weight less than 5 μm”. This more precise
description imply that dust in the dust chamber must be changed when a transformer is tested, this without
5 M0 ~. e! R6 u0 C+ Z' dany technical reasons. For the future, can we use the dust specified in IEC 60529 also for transformers?
Decision:
; P) {) S/ E6 }2 rThe horizontal safety function standard IEC 60529 shall be followed, i.e. the dust specified in subclause
+ ~" h0 m1 M$ y% Y, J13.4 can be used.