So is an ethernet line considered disabled when disconnected since it will
drop the link (although it keeps trying to establish link and resume the idle
data pattern?
Gary
- Original Message -
From: Mike Hopkins mailto:michael.hopk...@thermo.com
To: Konrad Stefanski
Hi Sam:
Correct me if I'm wrong, but the point of the type-level hipot test is not
to simulate a real-life condition (like surge protection), but to simulate
years of insulation degradation, which happens with or without surge
protection.
I disagree.
Primary circuits are subject
Interesting story. I wonder though if the result of the risk assessment
would have been It takes 2 faults for this to be hazardous, so probability
of occurrence is low, and we don't need to act on it. Since most product
safety standards consider safety to be adequate with only single fault
There are couplers available from a number of manufacturers; however, none
work at data rates much above 100kHz. For that reason, the current draft of
61000-4-5 revision 2 (not yet circulated) inlcudes the following -- keep in
mind, it is an EARLY draft, but it will appear in a CD by the end of
Prices depend on the design:
Some contain coupling and backfilter elements for 4 lines plus circuitry to
allow coupling using either capacitors (still the preferred method in
61000-4-5) or arrestors. They also allow the addition of clamps of various
levels to reduce or eliminate surges back to
Subject: Oregon and SW. Washington IEEE EMC Chapter Meeting, September 29,
2003
Details:
Topic: EMC Design Considerations for Military Systems Utilizing High
Speed Commercial Interfaces Such As USB, Firewire, 100 Base T, DVI and
SERDES
Speaker: Chris Kendall, CKC Labs
When: September 29,
This subject is also close to the top of my list of things to investigate...
I've recently priced out a professional coupling network and to my surprise
it weighed in with a hefty 10k (canadian) price tag.
Does anyone have any reference designs for their own home grown solutions that
they would
Hi Rich,
I assume SRD's would be the same as all radio devices. I think the
regulatory agency is Cofetel. Link to the Website is:
http://www.cofetel.gob.mx Hope your Spanish is good. I understand you
need in country representation to handle the approval. Testing is
probably required and a
Why don’t you try surge arrestors to coupling the surges to the equipment?
Use one whit 90V or less.
To decouple the surge from the AE use a common mode chock.
Sérgio L. Rocha Loures
IC SC QP Q - Quality Assurance
Supply Chain - Quality and Processes
SIEMENS
(Tel: +55 41 341-5898
Marko and group,
There was an interesting liability case in the UK in the late
eighties involving a certain brand and model of washer/drier.
The situation was that the machine had an aluminum heater box with the
drying element and a fan to blow air over it. The heater box was
provided
Thanks to all for some helpful comments, the equipment is professional. My
own investigations suggested that there may not be a single cable
option, but it was worth checking and in any case adds strength to my
comments within the Company.
Regards,
Neil Helsby
Hello list.
What is the simplest way to couple Surge pulses (EN 61000-4-5) with
telecomunication lines?
I haven't got proffesional coupling network.
And the second question, what is the simplest way to measure voltage of
disturbances from telecomunication lines without proffesional ISN?
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