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Brian O'Connell wrote
>> It is difficult for a component SMPS mfr to say that the outputs will
stay
within specified tolerance *DURING* these tests; because we cannot control
the ultimate end-use installation. <<
It is probably not helpful to ask for "shall not cause" without telling
vendors what
7:31 AM
> To: emc-p...@ieee.org
> Subject: Re: Burst and surge tests
>
>
> In message , dated Thu, 18 May 2006,
> brian_ku...@leco.com writes
> >So, we have specified that the output of power supplies must
> not cause
> >our electronics to malfunction during the 4-4 or
Ian,
I know of one PS manufacturer who states that their power supplies
complies only with Criterion B during EFT en Surges although the output
voltage remains within the limits of the normal operating conditions
(Ex. 9V +/-5%).
The reason for this is that there may be very small pulses, nsec or
u
It seems to me that you would not care if only some small fraction of the
surge potential coupled from primary to secondary for a short period of time
especially if it is common mode, but that what you don't want to have happen
is a differential dc level shift. Therefore I would mount the power su
In message , dated Thu, 18 May 2006,
brian_ku...@leco.com writes
>So, we have specified that the output of power supplies must not cause
>our electronics to malfunction during the 4-4 or 4-5 tests. We specify
>that the DC output of a power supply can not go "out of spec" during
>these tests.
E
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Your document:
RE: Burst and surge tests
was received by:
Jan Vercammen/AMEMV/AGFA
at:
2006-05-18 16:21:53
- This
message is from the IEEE Product Safety
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In message
,
dated Thu, 18 May 2006, iun...@servomex.com writes
>I have a question regarding the likely behaviour of ac to dc switch
>mode power supplies during fast transient burst tests to EN 61000-4-4
>and surge tests to EN 61000-4-5.
>
>For a manufacturer to claim conformity to these standa
Ian,
I would expect a power supply to function according to its
specifications.
This means that all output voltages have to stay within the specified
tolerance limits.
Best regards,
Michael
Michael Nagel
Senior EMC Engineer
Motorola GmbH
ECC Embedded Communications Computing
Lilienthalstrasse 1
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