Hi All
I'm trying to find out what the specified operational altitude
range(s) is (are) for power supplies (particularly switching mode ones). Do
any of you know what that spec may be, and particularly what is the rule for
derating at altitude for thermal issues. Many manufacturers don't specify a
maximum altitude but instead design in enough thermal overhead to
accommodate any reasonable terrestrial location.
According to GR-63-CORE the operating range without derating is 1800m above
sea level. If derating is required above 1800m
then the manufacturer must specify any additional requirements. Is it a
safety derating factor so that customers at 5000-10000ft don't smell smoke?
Do we have any recommendations for derating the operational temperature /
power consumption of power supplies as the operational altitude increases?
Any information or ideas you have would be appreciated.
Regards,
Carmen Filimon
Leitch Canada
>
>
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/
To cancel your subscription, send mail to:
majord...@ieee.org
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Michael Garretson: pstc_ad...@garretson.org
Dave Heald davehe...@mediaone.net
For policy questions, send mail to:
Richard Nute: ri...@ieee.org
Jim Bacher: j.bac...@ieee.org
All emc-pstc postings are archived and searchable on the web at:
No longer online until our new server is brought online and the old
messages are imported into the new server.
