DSH 592/06 Dust test for IP 5X and 6X as described in the transformer standard

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DSH 592/06 # E. e) t( e5 J0 O9 ^

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

17.1.1C, 13.4

61558-1(ed.1);am1 & 60529(ed.2);am1

% [, ?4 F, X) w2 UStandard: IEC 61558-1/1997
A1/1998
2 {( j. i# ]: UIEC 60529/1989
A1/1999
Sub clause: 17.1.1C
5 u& h1 ~% T3 ^5 M8 c13.4
Sheet N°: 592/06
Page: 1(1)
Subject: Dust test for IP 5X and
6X as described in the
: l8 `7 Y* G! ^& R! j( `0 Q0 m2 m+ E  ^transformer standard
7 V. [: o4 E9 d+ x2 [Key words:
" Z% x  S( [4 |- Transformers
- Dust test
- IEC 60529
3 d, }" S. L" E) @  @* G& kMeeting:
$ J5 N" b0 O# GDecision confirmed
at CTL 42nd meeting
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
7 R& ]4 G3 ~+ l: _1 S0 k: ~: i13.4. However, in the transformer standard the description of the dust divagate a
) ~+ F) l/ f/ p) O, Vbit as the following wording is added: “and shall have a range of particle size
down to and including 1 +m with at least 50% by weight less than 5 +m”. This
more precise description imply that dust in the dust chamber must be changed
when a transformer is tested, this without any technical reasons. For the future,
can we use the dust specified in IEC 60529 also for transformers?
Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
5 i/ i3 i4 ^5 s& ~5 q& y' Fspecified in subclause 13.4 can be used.

& f. z  `  K9 R/ `" W  t