Members:
I am looking for any information I can obtain on the near-field
standard that the above ETSI body is working on. We are looking for the status
of this standardization process and how far along they are with ratification -
or the likelihood of ratification.
Thank You
Environmental Professionals,
Is anyone familiar with a Common Position EC #19/1999, Official Journal of
European Commision, 4/5/99.
I was told that the EC#19/1999 is a European regulation that prohibits the
shipment of equipment containing HCFC into the EU after January 1, 2001.
I am curious
Since I deal solely with ITE-based standards I can't answer your question with
any certainty. Perhaps there is someone else out there with the details?
Craig Hensley
Iomega Corp.
Gary McInturff gary.mcintu...@worldwidepackets.com 12/21/00 12:15PM
Then I assume there are times when
forwarding for Peter...
Reply Separator
Subject:UL60950, Third Edition
Author: peter.tar...@sanmina.com
List-Post: emc-pstc@listserv.ieee.org
Date: 12/21/00 10:57 AM
Jim - Please forward to the EMC-PSTC list.
Early this week I received a copy
Hello All,
I have been told that on EN61000-3-2 (harmonic
standard)the class A limit is much easier than class
D, but when I look at the two tables, they look almost
identical. Could someone explain to me the difference
between the two limits (A D) and also which of the
two limit column in the
Michael et al,
That's always good news about a robust design, and setting higher test
standards than the minimum. My previous background was RD QA testing, but
that's not my role here.
IMO more than 30 meters is a lot of separation. (Except of course for
hazardous applications.) If sensors
Dear Huu Dung,
Allow me to express my understanding of the standards, and various
practices.
Section 2.3.1 requires that SELV circuits must be safe to touch, even
after a single fault in basic insulation. As a result, SELV circuits
must be either double insulated from hazardous votages, as in
Hi,
I believe your problem is in the interpretation of the words (Basic and
supplementary) used in the table 23. In this case, you should read the
word and as or and not plus. In fact in IEC 61010-1, table D.4, it
states Basic Insulation or Supplementary insulation. From this table, the
value
Early this week I received a copy of CSA60950/UL60950, Third Edition, the
new Bi-National Standard, based on IEC60950, Third Edition. The edition
number was maintained to correspond with the IEC standard edition number.
Publication date is 1DEC2000. Nifty.
Regards,
Peter L. Tarver, PE
In a message dated 12/21/00, you write:
He also said that meeting the 500 V ac or 707 V dc requirement was not
Hi David:
Thanks for the feedback. Can you elaborate on the reference above to the
500 VAC or 707 CDC requirement? What clause does this requirement derive
from? Was your CSA
I (not my employer) have a 8ft x 8ft x 9ft, copper screen room that I need
to get rid of. If you know of a University who would like to have one,
have them contact me. They are welcome to have it for free, as long as
they show up with a truck and pick it up. If I can not find a University
forwarding for liduhu...@ti.com
Reply Separator
Subject:EMC Position Available
Author: Lidu Huang; Ph.D.; Electromagnetics Analyst liduhu...@ti.com
List-Post: emc-pstc@listserv.ieee.org
Date: 12/20/00 10:07 AM
Hello,
We have an opening for an
Dear William,
1. Yes, there is a difference between these two: UL 94 specifies
that for UL5VB it is acceptable to see burn-through (hole) of any plaque
specimen. For 5VA is not acceptable to produce a hole during the testing.
2. The Annex A9 of EN60950 (IEC60950) does not
There are slight differences in the test parameters for 94-5VA and 94-5VB
classified materials. 94-5VB materials allow for some relaxation on the
burn-through requirement. This relaxation is considered acceptable for ITE.
According to UL, a Recognized Component material with either a 94-5VA
Ned, John, and EMC-Pstc
Thanks for your responses. You almost convinced me (at least you started
to) but the standard is either so badly written that it still could be
interpreted multiple ways or it is using different terminology than the
standards you are using. Let me elaborate a little
Great idea - - However the whole purpose of equipment designed for -
Electrical Equipment for Measurement, Control Laboratory use is to
measure control. This can be most difficult to do if your sensors and
control points are forced to be located in the building. In the case of
some of my
Gents,
I came across the following flammability rating UL 95-5VA and UL
94-5VB. Is there a difference between these two rating and which one is
equivalent to the EN60950 classification 5V.
Thanks in advance,
...
William D'Orazio
CAE Electronics Ltd.
Electrical System Designer
Joe,
Your post came exactly when I was preparing to submit a product powered by -48
V dc source. I have always wondered why it should be necessary to have
isolation in this situation, where is the inherent danger? Following your
arguments, I submitted this to my CSA rep, who agreed with me
Hi every body
The way I have read it is exactly as Courtland states.
The Dof C must be signed by someone who has the clout within the
organisation to pay the fines or go to jail if there is an infringement. In
fact some organisations in the UK have taken insurance to cover
Dear All,
Many thanks for this year and all good wishes for a Merry Christmas and a
Happy New Year to all of you and your families.
I would like to ask you a question and will thank for any comments.
Low voltage secondary circuits of class II equipment usually float and have
to be insulated from
Eric,
I get the point of your story however, taking measures
against surge on signal and telecom lines is definitely
less expensive as fiber solutions. I case of a direct hit, the coupling onto
a cable length of less then 10 meters between equipment and fiber converter
is enough to kill your
In a message dated 12/12/00, Peter Merguerian writes:
Assume you have equipment with external power earthed (Class 1) power
supply with an earthed appliance inlet for conenction to the mains. The
power supply output is connected to a dc unit with a TNV-2 interface with
no separation to SELV.
Eric,
To make your nice input more informative, please allow me to add what clause
3.6 reads:
Long distance lines: Lines within a building which are longer than 30m, or
which leave the building (including lines of outdoor instalations).
BM
--
On Wed, 20 December 2000,
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