Rich, and all the others
Thank you for your comments.
Some PSU manufacturers, such as XP Power, provide more detailed information on
their websites covering: insulation material classes actually used where not
Class A; higher loads with forced cooling; higher ambient when de-rated with
50% loa
Hi Charlie:
I'm looking at an enclosed IT system that contains
a number of 3rd party power supplies and, under
normal conditions, the ambient temperature around
various wall-wart and "soap-on-a-rope" power
supplies is a few degrees above their stated
maximum ambient temperatures.
T
There have been previous questions to this listserv about EMC software. April
issue of Incompliance magazine has article on evaluation of this stuff by Jack
McFadden. The 'turtle' analogy is a bit strange, but the article does seem to
cover most of what should be evaluated. In my little EMC-amat
In message <001901d0762b$e4c01810$ae404830$@ieee.org>, dated Mon, 13 Apr
2015, Richard Nute writes:
In view of our present knowledge and experience the author questions
the advisability of loading transformers continuously up to the present
A. I. E. E. limit of 105 deg. cent. hot spot and arg
Hi Charlie:
Where insulation is run above rated temperature,
what is the degradation method and does it follow
the Arrhenius equation?
V. M. Montsinger published a paper on this topic.
If you have access to IEEE Xplore, you can study
his paper to see if it applies to your situati
Hi Charlie:
If the customer demo system is for the USA, it
will have to be certified by an NRTL to be in
compliance with OSHA regulations. You *may* be
able to get an on-site one-of-a-kind certification
that *might* ignore the thermal issues.
Otherwise, SOL.
Good luck, and best
Hello Amund,
I don't know if your question relates to the RED timing conversation below
(which I think has been fully answered by Nick); or if this is a new
question relating to the general requirements of the R&TTE Directive (and
perhaps the RED in the future).
So, I will assume it's a completel
In message <002601d075bd$e2612370$a7236a50$@westin-emission.no>, dated
Mon, 13 Apr 2015, Amund Westin writes:
No, I wrote last July:
The RED cannot be used until at least one EU Member State has adopted
it into national law. I don't know whether this has happened yet.
The Commission has now
Declaration of Conformity with an "alert sign" (class 2) included. Then
should a Notified Body number be included in the DoC as well, right?
#Amund
-Opprinnelig melding-
Fra: Hooper, Nick [mailto:nick.hoo...@ul.com]
Sendt: 1. august 2014 15:20
Til: EMC-PSTC@LISTSERV.IEEE.ORG
Emne: Re
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