In a message dated 1/28/03 6:32:49 PM Central Standard Time,
drcuthb...@micron.com writes:
A1 to EN55022:1998 requires the use of ferrite clamps on all cables leaving
the table-top EUT for a connection outside the test site. Are there any
other manufacturers of these clamps other than Fischer
Hi Peter:
For safety, it is not clear from the standards whether
the main branch circuit breaker tripping during fault
conditions is an acceptable result.
I see no reason why this should not be acceptable. What
is your view? Some third party labs find it acceptable
I don't have a copy of EN55022 to look at so I'll ask a question: How many
ferrite clamps and what type are specified? And are they placed at various
places, at one location only, or placed as with a Bicon balun?
Dave Cuthbert
Micron Technology
From: richwo...@tycoint.com
Peter,
I do not find your question specific enough: which standards, what fault(s),
where in the world? Are you considering equipment connected only by domestic
ac mains plugs or also hard-wired or connected using industrial plugs?
It is certainly common for product safety standards, such as
Like most regulatory issues the answer is YES and NO.
Therefore it is dangerous and extremely misleading (to many lurkers) to apply
a general answer to all conditions:
* Generally the equipment is expected to protect itself with internal over
current and short-circuit protection.
*
Peter,
Well, you didn't tell us much about the device, but in general I would
say that if you are relying on the fault protection to be provided by someone
else that's not a good idea. Its not something in your control and if the
installation doesn't have the proper breakers you got
I've been trying to solve this one myself. I work with one pair of standards
(UL458 / CSA107.1) where they specifically say that opening the branch circuit
protection is acceptable during component fault testing, but NOT during short
circuit tests done for the purposes of validating inadequate
I read in !emc-pstc that don_borow...@selinc.com wrote (in
ofae2c2f5d.695d080d-on88256cbc.00568...@selinc.com) about
'Applicabilty of Flicker Standard' on Tue, 28 Jan 2003:
We are trying to figure out the applicability of 61000-3-3 Flicker Standard
to the power supply in our product. We have a
I read in !emc-pstc that richwo...@tycoint.com wrote (in 846BF526A205F8
4BA2B6045BBF7E9A6A04675B9C@flbocexu05) about 'EN61000-4-3:2002' on Tue,
28 Jan 2003:
Can anyone verify that EN61000-4-3:2000 does not contain common
modifications to the IEC document - i.e., they are identical?
I can't find
Dear All,
For safety, it is not clear from the standards whether the main branch circuit
breaker tripping during fault conditions is an acceptable result.
I see no reason why this should not be acceptable. What is your view? Some
third party labs find it acceptable and others do not.
Anyone can
Not an authoritative reply, just an opinion based on theoretical knowledge.
An automotive product operates from 12 Vdc, or perhaps some other dc
potential. In order for it to operate outside an auto, there must be an
external power supply involved. Presumably that problem could be solved by
The requirements are very different, especially in the test setup, and I
don't think you can make assumptions in either direction. For an electronic
sub-assembly, for example, you do radiated emissions at a measurement
distance of 1m, which is very much in the near field. You won't likely be
Without looking at their web pages, I would suspect that Schaffner and Rohde
Schwarz might be places to look. ETS-Lindgren, as well?
Ghery Pettit
Intel
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Tuesday, January 28, 2003 10:30 AM
To: emc-p...@majordomo.ieee.org
Subject:
A1 to EN55022:1998 requires the use of ferrite clamps on all cables leaving
the table-top EUT for a connection outside the test site. Are there any
other manufacturers of these clamps other than Fischer Custom
Communications?
Richard Woods
Sensormatic Electronics
Tyco International
This
I read in !emc-pstc that iun...@servomex.com wrote (in OF3F94F3F0.6C74C
b86-on80256cbc.004d2...@servomex.co.uk) about ''DOW' of standards' on
Tue, 28 Jan 2003:
The OJ for the LVD (page C317/73) gives 1.1.2004 as being the date beyond
which IEC 61010-1:1990/A2:1995 can no longer be used
Hi John:
No, this is not much of an issue for the U.S. (unless your facility
is
actually affecting the utility);
... or frying the neutral conductors with third-harmonic current.
In the USA, this has largely been fixed by a change in
the USA National Electrical Code.
G'Day!
Is anyone familiar with the standards needed to comply with the Automotive
*and* the EMC Directives? How do they compare? Or to put it another way, if
an item of equipment was known to be compliant with the Automotive
Directive, is it likely that it would therefore meet the
We are trying to figure out the applicability of 61000-3-3 Flicker Standard
to the power supply in our product. We have a device that may be hard
wired into the public low voltage (230 V) mains under certain
circumstances, and has no mains switch. Given this, it appears that the
maximum relative
Can anyone verify that EN61000-4-3:2000 does not contain common
modifications to the IEC document - i.e., they are identical?
Richard Woods
Sensormatic Electronics
Tyco International
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Technical Committee emc-pstc discussion list.
Visit
This seems to be the end of the Sectoral Annex Electrical Safety.
http://europa.eu.int/eur-lex/en/dat/2003/l_023/l_02320030128en00240025.pdf
Regards,
Kris
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit our web site at:
Dear Group,
The OJ for the LVD (page C317/73) gives 1.1.2004 as being the date beyond
which IEC 61010-1:1990/A2:1995 can no longer be used to presume
conformance with the requirements of this Directive. After this date, can
equipment previously assessed to this standard still
I read in !emc-pstc that boconn...@t-yuden.com wrote (in F7E9180F6F7F58
40858d3db815e4f7ad1f2...@cms21.t-yuden.com) about 'Unity Power Factor'
on Mon, 27 Jan 2003:
No, this is not much of an issue for the U.S. (unless your facility is
actually affecting the utility);
... or frying the
I read in !emc-pstc that don_macart...@selinc.com wrote (in OF26C3658E.
a50db9b6-on88256cbb.00613...@selinc.com) about 'Unity Power Factor' on
Mon, 27 Jan 2003:
Why are so many U.S. manufacturers using Unity Power Factor correctors in
low wattage power supplies?
Are there any U.S. requirements
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