Please pardon me if the large number of questions at the end of this
e-mail is overdoing it! I'll take as much help with this as I can get!
I'm sure that many of you either went through the stage we're at, or are
still there. We have been trouble-shooting radiated emissions problems
using primar
Jim,
Your interpretaion is 100% correct. I have personally Listed many
products with UL1950 Third Edition with a supplemental earthing
terminal as you described below with no basic insulation between
the TNV-2/TNV-3 circuits and SELV/Earth.
The standard specifies that basic insulation is one w
Doug,
The dc to ac convertors that you have analyzed may be CE marked
to meet the EMC Directive but not the LVD since the supply input
is below the limits in the LVD.
However, such equipment must still meet the General Product
Safety Directive (sorry I do not have the number available!). This
We just completed an approval with the exact same situation. I cannot
speak for your prodcut since I have not reviewed it. I can provide a
contact at UL if required.
One of the big concerns is the R/C connectors normally used for bringing
the lines in do not even meet UL1950 unless pins are s
Andreas,
This sounds pretty much like the ergonomic standards the Germany
enforces(?) through the GS mark from their test houses. There is a real
problem with these things as they are, or at least, were very subjective
rather than qualitative in nature. The present ZH618 (Sorry I'm trying t
Hello List,
Does anyone know if there is a radio frequency voltages(rf) safety standard
that would be similar in nature to the RAD HAZ stand ANSI C95.1-1994 for
personnel exposure? TIA.
Bill Jackson, CQE
wljack...@harris.com
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Hi John:
> In the CB Scheme "National Differences" document, Danish and Norwegian
> requirements (in 6.3.3.1 and 6.2.1.2, respectively) make reference to
> "equipotential bonding". Can anyone tell me exactly what equipotential bonding
> is? I assume that it is some form of grounding...would hav
Hello PS group,
I would like to hear the opinions/recommendations of the EMC-PSTC group and
especially anyone who has ever worked on a committee for the development and
revision of IEC 950, EN60950, UL1950, CSA C22.2 No. 950 and any other
national equivalents derived from IEC 950.
Over the years
Dear list members,
The Chicago Chapter of the IEEE EMC Society will be holding their March
meeting at the Underwriters Labs in Northbrook, IL
The topic for the meeting will be:
ANTENNA CALIBRATION FACTOR CHANGES: FREE SPACE VS. GEOMETRY
SPECIFIC.
A DISCUSSION OF PROPOSED CHANGES TO ANSI C63.4
Message text written by INTERNET:t...@world.std.com
>In my view, these exemptions are specifically targeted at equipment such
as
PBXs and network equipment that are typically installed by service
personnel
and include hardwired grounding.<
When Telecom equipment (of the non-network equipment varie
Posted for John Boucher:
From: "Boucher, John"
Subject: equipotential bonding
Date: Thu, 25 Mar 1999 09:02:44 -0700
To: "'emc-p...@ieee.org'"
> All:
>
> In the CB Scheme "National Differences" document, Danish and Norwegian
> requirements (in 6.3.3.1 and
Hello John,
I really doubt if you will hear a complaint from a Customer about the approvals
on a jumper cord. When you get down to it, the only people who care about
approvals are regulators, test houses, and certification engineers.
Since Feller is located in Austria, HAR cordage is no problem
Dear Group,
the standard prEN ISO 13407 is dealing with "human-centred design processes
for
interactive systems".
More:
"The document provides guidance on
human-centred design activities throughout the
life cycle of computer-based interactive
systems. It is aimed at those managing design
process
Richard,
As someone who is presently working on a project to build surge coupling
networks for Bellcore testing, I'll throw in my two cents worth:
Successfully designing, building and testing these CDNs is a much more
involved task than it would seem. The components required are usually
custom m
In a message dated 3/24/99 5:58:27 PM Central Standard Time,
e...@brianjones.co.uk writes:
> Those EMC aspects covered by harmonised standards, and not the TCF, would
> indeed need to be reconsidered if one of those standards is changed,
> because that part of the EMC compliance has been demon
Jim,
Let me thank you for your detailed input on this issue. Up to now I was alway
under the impression than the dc-ac inverters don't need to comply with any
safety standards and recently I purchased one dc-ac (12V car battery to 120V
for my portable TV)inverters for my camping holidays from a re
Greetings all:
I guess I should jump into the fray, since I am an inverter
manufacturer's regulatory engineer.
1. For CE marking purposes inverters should comply with EN50091-1-1 (the
harmonized UPS safety standard, which borrows heavily from EN60950 but
only up to A2) and with EN50091-2 (the h
Hi Doug,
First, I have to ask a couple of questions. You mentioned that this product
will be CE compliant. If so and if this accessory is aimed at the EU, why then
would it have North American NEMA 110V outlets? Or, does this product when CE
marked have outlets acceptable for CE marking?
lfresea...@aol.com wrote:
>
> Brian,
>
> I'm not sure that I agree with you on your TCF statement. Our TCF's reference
> Harmonized documents, when these change I'm expecting that we will have to
> update our TCF for what ever changes are introduced.
>
> You don't agree?
>
> Derek.
Derek
Wit
Does anyone have access to the article or addendum that was implemented
March 8, '99,
which is called Resolution 1,2,3.
Sandy
Product safety
954-723-5707
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