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 , v8 c, d! K: \7 f+ `0 _& l1 f  b 5 D9 R. |2 \$ K' y

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

Standard: IEC 61558-1/1997
A1/1998
6 }' G% F3 V4 X1 EIEC 60529/1989
A1/1999
Sub clause: 17.1.1C
13.4
/ a) B( B" o, M" F& W- z, aSheet N°: 592/06
Page: 1(1)
Subject: Dust test for IP 5X and
: Y7 L% i' y6 l( j% {6X as described in the
; w2 S6 V5 h. s& x' y+ Ltransformer standard
! }0 u" L, G1 E( aKey words:
- Transformers
2 y- ?% U7 Y  V7 A) b  \- Dust test
- IEC 60529
) c' X- Z* Y6 [( \Meeting:
Decision confirmed
at CTL 42nd meeting
, O; ^& o* V) w/ }  S9 b! c  K- B, YQuestion: 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
% s* t1 D3 n. V# r  I" a13.4. 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
! ?2 @! O3 W+ O6 u; b6 ], Lmore 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,
5 Y) m" Q- a. S$ P0 `can we use the dust specified in IEC 60529 also for transformers?
2 A6 d1 y8 G' U: h' p; [Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
specified in subclause 13.4 can be used.
! U$ K+ T3 e3 g+ u: z- F
# o* @! I" O0 M4 t& O1 w$ O* ]