John,
What has happened to the "profession equipment" classification
in these changes?
Thanks!
dave garnier
David Garnier
e GE Health Care
___________________________________________
David S. Garnier
Senior Technician
Functional & CT Engineering
3000 N. Grandview Ave - M/S W-1250
Waukesha, Wi. 53188
Tel: 262.312.7246
Cel: 414.899.7580
From: [email protected] [mailto:[email protected]] On Behalf Of John
Woodgate
Sent: Tuesday, August 30, 2005 6:02 AM
To: [email protected]
Subject: Re: Changes to EN61000-3-2?
"Gordon,Ian" <[email protected]> wrote (in
<e1ba0362b28ed211a1e80008c71ea30603387...@z-160-100-30-252.est.ibm.com>)
about 'Changes to EN61000-3-2?', on Tue, 30 Aug 2005:
>I was sent this communication:
>
>Apparently (CIE August 2005, pp26
>//http://www.cieonline.co.uk/cie2/articlen.asp?pid=752&id=8700 )
>EN61000-3-2 has been modified such that switch-mode power supplies
>other than those used in PCs, monitors and televisions are now covered
>under the 'Class A' category rather than 'Class D'; redefined in
>Amendment 14. The practical implication of this change is that the
>variable limit on harmonic currents has been replaced by a fixed limit
>based on the maximum power of Class A, which is 1000W. This essentially
>relaxes limits on harmonic currents drawn by sub-1kW converters, and
>may in many cases allow the use of passive (inductor) line current
>conditioning rather than active power factor correction. It may also
>cover motor drives (to be confirmed).
>
>Can anyone comment on whether this is this a valid interpretation of
>Amendment 14 of EN61000-3-2?
It's very old news and it's inaccurate. What can you expect from a
'product marketing manager'?
The changes to classification were made in the Millennium Amendment,
known initially in CENELEC (Europe) as A14 but now included in the
current standard as an IEC amendment.
Class D now includes ONLY PCs, PC monitors and TV receivers, so there is
no doubt that motor drives (and everything else that is not in Class B
or Class C) are in Class A.
The maximum power for Class A is NOT 1000 W but 3680 W (230 V and 16 A)
for single-phase equipment.
--
Regards, John Woodgate, OOO - Own Opinions Only.
Deadlines are 90% of deadliness.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
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