PDSH 1023 Dust test for IP 5X and 6X as described in the transformer standard
http://decisions.iecee.org/icons/ecblank.gif PDSH 1023
Dust test for IP 5X and 6X as described in the transformer standard
17.1.1C, 13.4
61558-1(ed.1);am1 & 61558-1(ed.2);am1 & 60529 all editions
Standard(s):
IEC 61558-1
IEC 60529
All editions
Subclause(s):
17.1.1C
13.4
No. Year
PDSH
1023 2010
Category: SAFE Developed by: ETF5
OSM/LUM
Subject:
Dust test for IP 5X and 6X as
described in the transformer
standard
Key words:
- Transformers
- Dust test
- IEC 60529
To be approved at the 49th
CTL Plenary Meeting, in 2012
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 μm with at least 50% by weight less than 5 μm”. 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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