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

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灯具防风罩

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IEC60335试验指甲

DSH 592/06

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

17.1.1C, 13.4 # u1 l1 H( o7 i1 S

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

Standard: IEC 61558-1/1997
A1/1998
+ ~  f$ l. l* w8 W  j2 `1 D" PIEC 60529/1989
: X3 F* B& q, f# g! ]A1/1999
Sub clause: 17.1.1C
5 A1 ~4 T0 k) R+ s2 V/ S+ A) p& [13.4
: X1 g& @! \1 M6 C  M& TSheet N°: 592/06
$ M- x* l4 e/ |) h& uPage: 1(1)
2 M* P9 h. [# {' D4 e( a+ w; M- KSubject: Dust test for IP 5X and
* z3 f( \- y7 \0 H5 r/ n' L6X as described in the
transformer standard
& y4 ]! x1 d  ?6 _1 u' gKey words:
8 G7 c  ^0 q$ M6 u& o- Transformers
- Dust test
- IEC 60529
4 n& r5 H% y9 J* lMeeting:
2 Y4 v0 X9 |' X) c: w) u4 r& WDecision confirmed
+ s7 L# N6 u7 Yat CTL 42nd meeting
# I" i- B! j1 U4 DQuestion: 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
9 H% T. ^9 `% V1 V" G" p' n% zdown 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?
. j  j& V+ d) N' F; h' zDecision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
0 R* J$ ?* |! t) x9 Rspecified in subclause 13.4 can be used.
& M: y" ]& I" k* R. l+ c/ X
- X# p3 g3 h4 i% x% m