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|  DSH 592/06
0 b8 D. O9 x" ]2 X5 I$ c+ n# ]( h$ G0 x" ^/ [8 o6 u+ f
| Dust test for IP 5X and 6X as described in the transformer standard
' D. E$ B; M, q/ U | 17.1.1C, 13.4% O3 Y8 w! m+ c: ^0 q
| 61558-1(ed.1);am1 & 60529(ed.2);am1- }3 r6 ]. N, J# b( t& Q
|
$ E' n% ?8 T$ v1 M
Standard: IEC 61558-1/1997
$ N6 F3 v6 S! nA1/1998
6 Q6 h& g, [& X ]" i7 `0 U1 r& JIEC 60529/1989
3 U9 z9 m8 F* U4 h: @$ xA1/1999# P3 B. O& f( N" b3 D
Sub clause: 17.1.1C2 L, `# o3 d" Q" E+ b- {" B2 H
13.4
/ \" I- j) Q3 J! v9 N3 e- VSheet N°: 592/06
# X1 E' o5 x8 e( f/ KPage: 1(1)
* d e$ R! _3 m5 lSubject: Dust test for IP 5X and0 X7 _' b4 b. @9 _+ O0 [% A8 k( M
6X as described in the! m2 B4 \7 @. l4 R2 c
transformer standard
S3 F3 a# o, rKey words:# S: P E- d* d6 y
- Transformers
+ j% ]3 X% o6 C4 ]- Dust test
) |/ M- S) D( Y/ p+ \" h- IEC 60529
1 W7 f' J& s9 U7 t# s2 n! I# Q% t( OMeeting:$ e5 c) K+ A* Z2 K: H2 ]
Decision confirmed& \6 ^: k* w C% r# m! J# M
at CTL 42nd meeting8 M5 S4 u- ?0 t6 H7 t* a! G
Question: In the horizontal safety function standard for degree of protection provided by1 I7 h- W" D& r& @4 y
enclosures (IP code), IEC 60529, a description of the dust is given in subclause
' e! W. c( H) P; G6 I13.4. However, in the transformer standard the description of the dust divagate a
2 u, L" @3 v# E. k# O: m( l/ V; C( nbit as the following wording is added: “and shall have a range of particle size
+ @( ^" }! ?. hdown to and including 1 +m with at least 50% by weight less than 5 +m”. This' t D# E! I$ N$ v2 o z
more precise description imply that dust in the dust chamber must be changed
* B V& ^' a- E* f2 r, [when a transformer is tested, this without any technical reasons. For the future,- T- z0 t$ H. J" t/ M7 e" M4 ]% ~
can we use the dust specified in IEC 60529 also for transformers?- z3 h! C2 X- j5 s/ \1 y* K0 o. f1 B
Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust# ~1 \' b! s6 g6 e9 y. R
specified in subclause 13.4 can be used.
2 p W+ k7 R1 m
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