CENELEC prA14 passed amending EN61000-3-2 Class D to include only PC's,
monitors, and TV's. So, if your product is not in any of those categories,
you need not comply with Class D after the doa of the amendment.
Nevertheless, if your product is Class D, the Class D limits are the same
as those for Class A for the 5th harmonic and very close for most of the
other harmonics which are likely to be close to the limit.
Class D allows you to test at "rated power" which is the same as max power
expected to be drawn from the unit. This allows you to test at one power
level, unless your product has fluctuating harmonics. Fluctuating harmonics
are usually present in products which have electronic power supplies plus
intermittent motor or heater loads which turn off and on during normal
operation. In such a case, you must test in both operating conditions
John P. Wagner
AVAYA Communication
11900 N. Pecos St, Room 2F58
Denver CO 80234
email: johnwag...@avaya.com
phone: 303 538-4241
fax: 303 538-5211
> ----------
> From:
> gunter_j_ma...@embraco.com.br[SMTP:gunter_j_ma...@embraco.com.br]
> Reply To: gunter_j_ma...@embraco.com.br
> Sent: Monday, September 25, 2000 7:20 AM
> To: emc-p...@majordomo.ieee.org
> Subject: Harmonics and the 600W limit
>
>
> Correcting my English:
>
> A question about the famous 61000-3-2.
>
> What should I consider if my equipment works with an input power less
> than, and sometimes above 600W in normal conditions ? Will my equipment
> need to mutate to comply with class A and D !? :-)
>
> Thanks.
>
> Günter J. Maass
> Eletronic Researcher
> EMBRACO S.A.
>
>
>
>
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