Don's approach does seem reasonable _if_ you build a simple R-L network to
provide some impedance to the power mains. A good stiff supply might make a
product look pretty good. Another thought is to look at the mains supply
current for bumps and calculate what voltage would be created across the
standard impedance.
regards,
Brent DeWitt
Datex-Ohmeda
Louisville, CO
[email protected] on 09/12/2000 12:14:41 PM
Please respond to [email protected]
To: [email protected], [email protected],
[email protected]
cc: [email protected] (bcc: Brent Dewitt/US/D-O)
Subject: RE: EN 61000-3-3
Barbara,
A very rough guide might be to observe the 230 V on the mains and see if
your product causes it to dip a few volts momentarily (or do an analysis to
determine worst case dip and frequency of dip). If it doesn't dip at all,
you have no need to measure per 6.1.
If the mains voltage does dip, you need to worry about dmax, d(t), dc at a
minimum; if it dips repetitively you also need to be concerned about Plt and
Pst.
Forum, does this sound like a reasonable approach?
Regards,
Don Umbdenstock
> ----------
> From: Gary McInturff[SMTP:[email protected]]
> Reply To: Gary McInturff
> Sent: Tuesday, September 12, 2000 1:05 PM
> To: 'Brooks, Barbara'; EMC Post
> Cc: [email protected]
> Subject: RE: EN 61000-3-3
>
>
> Barbara,
> While not definitive I believe the scope section of the standard describes
> a
> few likely devices. I don't have the standard in front of me, but seems I
> remember seeing it that section.
> Gary
>
> -----Original Message-----
> From: Brooks, Barbara [mailto:[email protected]]
> Sent: Tuesday, September 12, 2000 7:10 AM
> To: EMC Post
> Cc: [email protected]
> Subject: EN 61000-3-3
>
>
>
>
> Does any one have any information regarding how you determine if equipment
> will not product significant voltage fluctuations or flicker with out
> performing the tests of EN 61000-3-3 per Paragraph 6.1?
>
> EN 61000-3-3 Paragraph 6.1 states "Test shall not be made on equipment
> which
> is unlikely to product significant voltage fluctuations or flicker."
>
>
> Barbara Brooks
> Wyle Laboratories
> 7800 Highway 20 West
> Huntsville, AL 35807-7777
> (256) 837-4411 ext 595
> (253) 721-0144 Fax
> [email protected]
>
>
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