IMO -
Section A. List some test parameters on a variety of equipment:
Photocopiers, Hairdryers or portable tools, etc and may cause voltage spikes
when turned on. The test limits describe the acceptable amount of voltage
drop as 3 or 4% depending( steady state and max relative voltage change).
There is a time limit imposed as well, but sort of a rule of thumb if your
equipment is suddenly demanding a lot of power that could cause the overhead
lights to flicker (this flicker isn't always perceivable on a onsy-twosy
basis) you probably need to comply to these limits.
This isn't video flicker etc or switch mode power supply stuff. I
don't foresee a lot of ITE equipment falling into this category. The
occasionally firing of the disk drives etc shouldn't be drawing this kind of
power.
I have my asbestos underwear on just in case I'm wrong; somebody
will let me know.
Gary
.
-----Original Message-----
From: David Gelfand [SMTP:[email protected]]
Sent: Wednesday, July 21, 1999 10:27 AM
To: [email protected]
Subject: Re: Computer classification in EN61000-3-3
Bonjour Benoit et al,
EN 61000-3-3 section 6.1 states: "Tests shall not be made on
equipment
which is unlikely to produce significant voltage fluctuations or
flicker."
How do you interpret the phrase?
David.
David Gelfand P.Eng
Approvals Group Leader
Memotec Communications Inc.
Montreal Canada
-----Original Message-----
From: Benoit Nadeau <[email protected]>
To: [email protected] <[email protected]>
Date: Wednesday, July 21, 1999 12:36 PM
Subject: Computer classification in EN61000-3-3
>
>Bonjour de Montreal,
>
>After a careful reading of EN61000-3-3, we tried to identify the
testing
>conditions for computer devices and peripherals. Appendix A of the
standard
>details the conditions for various household equipments.
>
>In section A.11 they specify that the test condition for consumer
>electronic devices is to measure only the dmax (maximum 4% of
voltage
>variation).
>
>Are computer and peripheral considered as consumer electronic
device ?
>
>If it is the case, then we don't need a flikermeter to meet the
EN61000-3-3.
>
>Any comments ?
>
>
>
>
>--------------------------------------------------------------------------
>Benoit Nadeau, ing. M.ing. (P.Eng., M.Eng)
>Gerant du Groupe Conformite (Conformity Group Manager)
>Matrox <http://www.matrox.com/>
>--------------------------------------------------------------------------
>
>1055, boul. St-Regis
>Dorval (Quebec) Canada
>H9P 2T4
>
>Tel : (514) 822-6000 (x2475)
>FAX : (514) 822-6275
>Internet : [email protected], <mailto:[email protected]>
>
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