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

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IEC60335试验指甲

DSH 592/06 # v9 v" F+ g/ b+ R; Y * Z* t  V8 Q3 U+ U

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

17.1.1C, 13.4 1 ^4 z; [' X: a8 W) B; S

61558-1(ed.1);am1 & 60529(ed.2);am1 + w9 {8 t, p  D8 f4 b/ s# `

Standard: IEC 61558-1/1997
* I  S# M) i, y5 ^# [A1/1998
* A! `* v$ N  L. |3 \, ^IEC 60529/1989
0 M2 U; U' r; Y. rA1/1999
Sub clause: 17.1.1C
13.4
& @: X' `  x* E3 F- qSheet N°: 592/06
Page: 1(1)
Subject: Dust test for IP 5X and
6X as described in the
0 W! W9 c0 W9 f; R4 B/ Ytransformer standard
. }1 M2 P) \0 N8 a+ wKey words:
- Transformers
' I* _4 J! }* Y- Dust test
: f) T/ K$ t; Z" L& V9 V0 b- IEC 60529
3 P  u" I5 K+ ZMeeting:
Decision confirmed
* j$ y8 ~: M. A% R6 A8 eat 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
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 size
down to and including 1 +m with at least 50% by weight less than 5 +m”. This
; g9 n- a: {+ [' H. @; w. fmore precise description imply that dust in the dust chamber must be changed
( t1 h/ w' n6 U2 _when a transformer is tested, this without any technical reasons. For the future,
3 g. l2 V. P* Ycan we use the dust specified in IEC 60529 also for transformers?
# \( x5 y/ C2 S- {4 s$ w& `% s- xDecision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
  l, A4 ]2 g  Nspecified in subclause 13.4 can be used.