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|  DSH 592/06$ R* Q8 ^$ m& q: m2 \" T; V8 L
. O/ n0 C) L1 y* j( h | Dust test for IP 5X and 6X as described in the transformer standard0 e: p: ~, ^$ c* w# y
| 17.1.1C, 13.4- W5 B* ^- S! f- D f) R6 o
| 61558-1(ed.1);am1 & 60529(ed.2);am1
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Standard: IEC 61558-1/1997
/ R7 B3 Q" w: S2 x: o4 n1 dA1/1998
2 r+ V5 K6 X/ o& y0 t0 M4 r6 IIEC 60529/1989! J# L, q7 O5 c/ }
A1/1999
2 K# P5 Q' Y) F1 q) N/ ]3 ~Sub clause: 17.1.1C
9 ]$ L. a I/ G' C9 M9 m! J' k13.46 e6 T5 j( R4 V: q$ I1 m. }
Sheet N°: 592/06
% V* `. _( \. h3 V8 mPage: 1(1), R: l" a2 S5 | _* w; B
Subject: Dust test for IP 5X and
: ]+ I" O5 ?+ V9 s$ h5 T6X as described in the- C+ `: ]( I _1 C" f0 t& ^* m
transformer standard4 e1 s7 e1 u2 p' H
Key words:
9 n' A/ W( e- `2 j0 |$ P4 u- Transformers+ g4 R& R- E; [4 _+ A8 R9 h4 s) o
- Dust test i/ c3 e; j4 L
- IEC 60529
: @3 V- l! C9 S1 Q5 t EMeeting:
$ F' ]1 }0 I& f' w8 L" B; NDecision confirmed- m" g9 r# N1 q
at CTL 42nd meeting1 G& q, O# k8 c7 l1 |4 l
Question: In the horizontal safety function standard for degree of protection provided by
! W2 m! @7 f2 p+ I* [! l; V* r3 J! \; uenclosures (IP code), IEC 60529, a description of the dust is given in subclause
# W5 ]5 D$ r5 H( Y: i13.4. However, in the transformer standard the description of the dust divagate a8 T" r2 p. R' N7 C' `- W
bit as the following wording is added: “and shall have a range of particle size
. [! i1 e/ ^. x. a7 Hdown to and including 1 +m with at least 50% by weight less than 5 +m”. This L& D( K6 X( p: w9 C
more precise description imply that dust in the dust chamber must be changed
" a9 G9 u4 E# ?/ m, T+ zwhen a transformer is tested, this without any technical reasons. For the future,
; x k6 l v( r* R; H; \) qcan we use the dust specified in IEC 60529 also for transformers?; L" K, V- R3 ^, U) u" _. S) O4 u
Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust, x2 `3 [1 F& O4 G: J; e
specified in subclause 13.4 can be used.; J3 v/ g1 @, K- k- z: l# K
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