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Massimo,
Just to underscore what others have stated, long ago in one
of the resistor mfr's catalogues, there was a discussion of
this topic. Essentially, do not violate the DC wattage
rating of the resistor based on a 1 second time period.
As an example, a 1W, 1 Ohm, carbon composition res
I'd be interested as well, for two reasons. 1) I think the requirement
is a bit out of date, and really only discusses bringing in two DC power feeds,
A and B. That however seems more adapted to the days of simpler systems that
would take the power through some steering diodes and take
I only have the generic EN50082-2 (immunity) and EN50081-2 (emission)
standards, so I quote the description of locations from these standards:
QUOTE start
Industrial locations are characterized by the existence of one or more of
the following conditions:
- industrial, scientific and medical appara
Hi Gert,
Thanks for the reply. EN61000-6-2 calls EN61000-4-6, so I was
indirectly referencing that standard. I neglected to apply the
equations of section 6.4.1 as pointed out to me by Brian Kunde. My
thanks to him and to you for your offer.
Kind Regards,
Sam Wismer
Engineering Manager
I suspect that this will depend very strongly on the characteristics of
specific type of resistor. Further, there will undoubtedly be very
significant differences from manufacturer to manufacturer, in the
ability to absorb stresses well beyond normal design intent. I think it
would be rather hard
I read in !emc-pstc that Sam Wismer wrote (in
<001d01c1b965$b6143e60$0201a8c0@sam>) about 'EN61000-6-2', on Tue, 19
Feb 2002:
> Ive tried to use an attenuator and compensate for it in my readings, but
>this creates a high VSWR. Any ideas how to extend the dynamic range of my
>rece
Hello,
The two cables are for LAN connections. Cat3 has bandwidth of 16 MHz,
cat5 has 100 MHz. The LAN cables in this time are per Cat5e or Cat6.
You can find information in:
http://www.connectworld.net/c1.html
Regards
Jacob
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mail
With regards to "beryllium" fingers, they are not beryllium. They are an
alloy of copper and beryllium, with the standard C17000 alloy containing
only 1.7% beryllium.
There is no danger in simply handling these fingers. To be sure, there
is a danger in breathing in dust from machining actual ber
Hi Group,
EN 61000-6-2 calls for severity level 3, or 10Vrms for conducted
disturbances. This equates to 37dBm which is 7dB higher than the upper
limit my receiver will handle (during calibration of the CDN). I've
tried to use an attenuator and compensate for it in my readings, but
this creates a
Do the Generic emission and immunity ENs for industrial locations provide
examples of those locations? If so, I would appreciate someone providing the
list of the example locations. I need to compare them against the examples
of light-industrial locations. Thanks in advance.
Richard Woods
Sensor
>-Original Message-
>From: John Barnes [mailto:jrbar...@iglou.com]
>Sent: Tuesday, February 19, 2002 4:45 AM
>To: emc-p...@majordomo.ieee.org
>Subject: Re: Resistors pulse loading capabilities
>
>
>
>Massimo,
>All the tests that I've seen for evaluating the peak-pulse-power
>handling cap
"Are you sure? Berylium Oxide (BeO) has a long-standing reputation for
being
toxic, but I've never heard of metalic berylium (Be) posing a problem."
See the following for more details:
http://www.atsdr.cdc.gov/tfacts4.html
Paul Hare e: ph...@pirus.com
Compliance Engineer w: 97
Hello Group,
Can anyone direct me toward a site that will give me information about " the
industry standard " concerning the "twist per inch " for the different
categories of Network Cable wires
i.e. Cat 3 vs. Cat 5 ?
Thanks,
Reg
-Original Message-
From: Colgan, Chris [mailto:chris.c
Massimo,
All the tests that I've seen for evaluating the peak-pulse-power
handling capabilities of resistors are based on charging a bank of
capacitors to a high voltage, then applying this energy (E = 1/2 * c * V
* V) to the part/equipment-under-test through a low-resistance
low-inductance switch
On Tue, 19 Feb 2002 18:08:09 +0800, "Wan Juang Foo" wrote:
>BTW, 'Be' (Beryllium) is a highly toxic metal that will not get out of your
>blood once it enters it. I would strongly advise anyone cleaning their
>Be-Cu finger stocks from exposing themselves to any possibilities of cuts
>or abrassio
Richard,
EN 61000-6-1 has common deviations in clause 2, 3.5, Table 1 and Table 5.
EN 61000-6-3 has common deviations in clause 2, 4, 9, Table 1 and Annex A.
Both standards have an Annex ZA showing comparison between international
and EN/HD standards.
Hope this helps.
Regards,
Kris Carpentier
I have heard the "lilly" tablets can be purchased at Target stores, although I have not yet verified this.
Ed
>From: Rich Nute
>Reply-To: Rich Nute
>To: e.l...@wanadoo.fr
>CC: emc-p...@majordomo.ieee.org
>Subject: Re: Flammabilty requirement for cloth used on loudspeaker / UL6500
>Date: We
The other problem could be that whoever build the chamber did not make the
door. They buy it off from someone else and the warranty is only one year.
:-) One year seems to be reasonable period considering that there is a
number of things that can go wrong with moving parts that are constantly
h
Are EN 61000-6-1 and -3 identical to the IEC generic standards, or did
CENELEC introduce modifications?
Richard Woods
Sensormatic Electronics
Tyco International
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Hi Massimo,
Try http://www.vtm.co.uk/.
They had a good calculation method in the printed version of their
catalog which does not seem to be available on the website ( I haven't
looked very hard for it). It worked well for sizing in-rush limiting resistors.
Regards
- Chris
-Original Mess
I can't find IEC 61000-6-3 on the IEC web site, but it was published many
years ago. Could it be under a different numbering scheme? What's
interesting is that IEC 61000-6-1 is there as are other parts of the -6
series.
Richard Woods
Sensormatic Electronics
Tyco International
-
Hi Folk
I want to know EMC standards and Test specifications of GSM as follow.
■ GSM phone
■ GSM accessory (i.e. Adaptor,Ear phone)
If you kow about that,Please let me know.
Best regards
James.
I read in !emc-pstc that Massimo Polignano
wrote (in ) about 'Resistors pulse loading capabilities', on
Mon, 18 Feb 2002:
>Does anybody out of there know what are the methods to evaluate resistors
>pulse loading capabilities (maximum peak pulse voltage without failing to
>open circuit)?
>Is there
Does anybody out of there know what are the methods to evaluate resistors
pulse loading capabilities (maximum peak pulse voltage without failing to
open circuit)?
Is there any standard models?
This could be very useful to design the power supply circuit parts involved
in a surge immunity test.
Th
Thanks to David Spencer who pointed out that the document can be located
using the CISPR rather than IEC prefix.
> -Original Message-
> From: WOODS, RICHARD
> Sent: Monday, February 18, 2002 12:46 PM
> To: 'emc-pstc'
> Subject: IEC 61000-6-3
>
> I can't find IEC 61000-
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