DSH 592/06 Dust test for IP 5X and 6X as described in the transformer standard
http://decisions.iecee.org/icons/ecblank.gif DSH 592/06
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
IEC 60529/1989
A1/1999
Sub clause: 17.1.1C
13.4
Sheet N°: 592/06
Page: 1(1)
Subject: Dust test for IP 5X and
6X as described in the
transformer standard
Key words:
- Transformers
- Dust test
- IEC 60529
Meeting:
Decision confirmed
at 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
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?
Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
specified in subclause 13.4 can be used.
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