Mr. Peruzzi,
With the exception of certain ECMA safety standards and the IEC safety
standard for power supplies (61204), I am not aware of any IEC/harmonized
safety standards that contain special clauses for the consideration of the
power supply's performance and construction as a special type of
Blackwood Compliance Laboratories (formerly Blackwood EMC) are looking for a
product electrical safety test engineer with experience in testing a variety
of products to the IEC/EN 60335 series of electrical safety standards.
Experience in other electrical safety standards, such as IEC/EN 60065
I just posted a new episode of the Safety Guy PodCast. If you are interested
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Everyone
Here is an update of the details for our first meeting of 2007. More
information has been included on Richard Marshall's talk.
The event is free to all, but please note the requirement to register in
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Best wishes
Dear all,
Just to inform you with the answer from Jonathan Steward.
It seems that he didn’t succeed in sending his message to the group.
I am intended to support his answer. It is a good balance of arguments.
Thanks Jonathan!
Kind regards
Theo Hildering
Consultant
E-mail:
Brian,
Could you please give me ONE example of a specific requirement on a POWER
SUPPLY (not on a single component) in IEC 60601-1?
Thanks,
Paolo Peruzzi
From: Brian O'Connell oconne...@tamuracorp.com
To: emc-p...@ieee.org
Sent: Thu, 22 Mar 2007 08:10:13 -0800
Subject: RE: SMPS test according
Jim,
Are we talking about a mechanical enclosure or electrical enclosure? Surely,
not a fire enclosure.
Refet to 4.7.3.3 which discusses Materials for Components and Other Parts
Outside Fire Enclosures. The combination plastic/cloth would have to meet HB
or HBF, however, there are many
Hello All,
Don't lose sight of the fact that low leakage current limits of
electromedical equipment will mandate particular transformer constructions
which yield these low values of leakage current. In my experience a
typical '950 power supply will not satisfy the requirements.
Best regards,
Negligible leakage comes from a decent xfmr design (typically 100-1500nA),
essentially all leakage, for class 1 construction, comes from the y-caps
in the filter section of the ac mains input. Also, I have seen some SMPS
designs use Y1 caps for pri/sec coupling - which will contribute to
leakage
60601-1 is explicit about type test requirements for abnormal operation
and fault conditions, and the performance during abnormal operating
conditions as one of the risk management mitigations.
If you do not understand SMPS theory, consider buying some prelim time
from your agency engineer to
Brian,
Thank you very much for your exhaustive answer.
I should have been more clear; in our medical devices we usually design the
SMPS by ourselves, and we don't want to have a separate certification for
the supply unit, but just one for the system as a whole.
I was just wondering if,
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