Hello group
The EN61000-3-2-A14 was published and released many products to comply
with the Class D limits. But I have a doubt for a "powerful" situation.
Does anybody know a standard (published or under discussion) for
harmonics limits that is applied for equipments with an input rms current
higher than 16 A ?
And for professional equipment with an input power higher than 1kW ....
what would be the appropriate standard ?
In the final draft of EN61000-3-2-A14, the IEC61000-3-12 is mentioned ?
clause 4. Is it published ?
My concern :
If I had a new product, I would first classify if it is or not a
professional equipment.
If it is, I would need to find the answers for the cited questions.
If it's not, I guess the EN61000-3-2-A14 would be the definitive
standard.
An example for the last case :
Considering a non professional product ( up to 16A), not a PC or a
television (not Class D according to the amendment A14).
My interpretation is that it will need to follow the Class A limits of
EN61000-3-2-A14.
Please, correct me if I am wrong, but those limits are tough for a power
higher than 600W (I don't want to mention 2kW !).
A single rectifier with a bulk capacitor would be prohibitive, an
inductor to smooth the current would be large.
And there are the active solutions (PFCs). It would put the harmonics
down , but the cost and efficiency would be damaged.
So, am I missing a way out to avoid an active PFC ?
Sorry for the lot of questions I made.
Any comment will be welcome.
Günter J. Maass
Eletronic Researcher
EMBRACO S.A.
Phone: 55 47 441-2059
Fax: 55 47 441-2730
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