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

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PDSH 1023 ( T- r+ \# Y9 | / o  T1 t& U# w9 A

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

17.1.1C, 13.4 # l4 [0 x5 y' v% W9 j' s

61558-1(ed.1);am1 & 61558-1(ed.2);am1 & 60529 all editions / }! }" {# r. K

Standard(s):
IEC 61558-1
" t# ]( n1 ^& v( JIEC 60529
3 M: {5 k5 |: ]: d& z9 nAll editions
! x& Z7 v. Q& _; VSubclause(s):
17.1.1C
13.4
No. Year
PDSH
3 D3 @; |; V5 I. E1023 2010
Category: SAFE Developed by: ETF5
OSM/LUM
$ u+ @6 s# T' o  _) PSubject:
Dust test for IP 5X and 6X as
described in the transformer
: r) q7 O# |3 h7 u8 b, qstandard
Key words:
  D/ g2 V3 k& t2 L5 |- Transformers
- Dust test
- IEC 60529
To be approved at the 49th
CTL Plenary Meeting, in 2012
0 U' p* I3 m; L/ O& D6 dQuestion:
In the horizontal safety function standard for degree of protection provided by enclosures (IP code), IEC
' {: I( f) `# n; t  n& L6 U# K60529, 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
0 {6 L( G% p9 @0 @9 d0 w; ~  ^" V$ d  b7 Zsize down to and including 1 μm with at least 50% by weight less than 5 μm”. This more precise
, l7 ]! L$ D' ]1 L* v2 hdescription imply that dust in the dust chamber must be changed when a transformer is tested, this without
6 E' E/ u! ^% u4 ?& ~( l4 g( J+ ]9 dany technical reasons. For the future, can we use the dust specified in IEC 60529 also for transformers?
1 P, n4 C8 Z% q, J4 L4 MDecision:
* \; ~. }4 \9 p% [4 [6 wThe horizontal safety function standard IEC 60529 shall be followed, i.e. the dust specified in subclause
13.4 can be used.
  T. K: h" G7 C2 _7 H
) Z1 e) f! i$ N1 Q