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IEC 61000-3-2 and offline power supplies

I know very little about IEC 61000-3-2 and the first simple question I have is do I need to?

The design I am looking into will be Class D and if acceptable I intend to use full wave rectification and filter capacitor. Probably with a series surge suppressor and maybe a little series resistance to give the bridge an easier time (and help with harmonics).

Is this configuration likely to meet IEC 61000-3-2 requirements? It seems class D limits are specified as a percentage of power drawn so at first sight there doesn't seem to a particular power rating at which a different approach is required.

Can anyone advise or point me at information sources?

Reply to
nospam
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Reed the standard - no easy shortcut there

But if you stay below 50W (70W) power level you need not to be conserned of harmonic currents on the mains (ie no PFC needed)

Otherwise you need to comply with the harmonics as described in the standard

Regards

Klaus

Reply to
Klaus Kragelund

in europe, these regulations have to be met whenever you want to sell a product on eu market and you need the CE mark. There is no stricht need in caring for these regulations as long as you are building hobby projects and you do not disturb other people with your equipment. IEC-61000-3-2 deals with harmonic distortion of mains current and delivers the background for power factor correction. Depending on the class of equipment, i.e. whether it is rare or quite common, there exist limits of average power consumption, below which no distortion limits are applicable. For audio equipment, I think the limit is 75W average, but I am not sure of this. If you intend to bring your product onto the market, I would advise you to get information about the standards applicable to your product and then to buy them ALL. This can cost several thousand dollars and there is no legal way to download them for free from the internet.

Reply to
hjheckert

Class D limits only apply to IT equipment and TVs IIRC ( thankfully ). I played a little part in helping get that changed from a blanket coverage.

Graham

Reply to
Pooh Bear

Audio is exempt from Class D. Otherwise almost every 'pro-audio' amplifier would be outlawed.

Buying all the standards called up for EMC is a pig. At least safety just needs one.

Graham

Reply to
Pooh Bear

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