EMC Master from Netherlands. Repped in US by Richard Janiec on Long Island.
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From: Aschenberg, Mat matt.aschenb...@echostar.com
To: emc-p...@ieee.org
Subject: 10Kv Surge unit to EN60065 standards
Date: Thu, Nov 18, 1999, 10:53 AM
Hi all,
I am looking for a 10KV surge unit. I
Is this article in *.pdf format for any to pick up?
- Robert -
-Original Message-
From: John Juhasz jjuh...@fiberoptions.com
To: emc-p...@majordomo.ieee.org emc-p...@majordomo.ieee.org;
'ri...@ieee.org' ri...@ieee.org
Date: Thursday, November 18, 1999 12:09 PM
Just received the latest issue (Nov)of 'Conformity' newsletter from
Curtis-Straus.
I see that one of our regulars (board-master?) on this board, Rich Nute, had
his article,
'Floating Circuits-Protection Against Electric Shock' published in the
newsletter.
Nice article Rich! Are those your
To all,
Does a power supply for use in Australia have to be individually
C-Tick marked.? If it were connected to another product that was C-Tick
marked and sold as part of that system (With a requisite C-Tick folder)
would the power supply still have to be individually C-tick
George-
The South American countries use the IEC standards as the basis for
compliance, so you would want to use the IEC wire colors if you are going to
meet the requirements there.
Regards,
Jeff
-Original Message-
From: George Waters [mailto:gwat...@digiceiver.com]
Sent: Wednesday,
Hi all,
I am looking for a 10KV surge unit. I understand that Keytek has one, but I
think that it is overpriced. Does anyone know of a manufacturer that makes
these devices?
It is a European standard, are there European companies making these?
Thanks,
Mat Aschenberg
-
This message is
Posted for: wolfgang_josenh...@3com.com
-Original Message-
From: wolfgang_josenh...@3com.com [SMTP:wolfgang_josenh...@3com.com]
Sent: Thursday, November 18, 1999 7:56 AM
To: Rains,Mike
Cc: 'emc-p...@ieee.org'
Subject: Re: Printed Wiring Board Design for
Laura,
The gauge you listed is 0.75 sq-mm which is suitable up to 6 amperes according
to IEC 60335-1. Also, check EN 60799 for more information on cord sets.
BTW. Who is your cord set supplier?
Regards,
+=+
|Ronald R. Wellman
Hi all.
I have recently started looking into the filtering requirements for USB
2.0. I had originally thought of using common mode chokes at the connector,
then I found out that the EOP (End of Packet) was a common mode signal.
Bummer. Has anyone explored the filtering/compliance aspects of
There are two sets of regulations: one for domestic equipment and one for
work place equipment.
Domestic: There are no federal laws except that the product must be safe.
Some states (e.g. Maryland), counties (e.g., Orange, CA) and cities (e.g.,
San Francisco) have laws that require products to
There is some drag established in the tube, so drill several holes along the
length, to let the air our. One of the NRTLs questioned us when using the
tube without the holes, and then suggested putting them in.
You can also make the tube slightly longer, and then drill a hole through
both sides
Egon (and fellow list members),
I think you meant to reply to Scott Douglas. Lately, I have received several
emails which were replies to him. Since most of them were probably initiated
by clicking on the Reply button, I suspect some internet glitch is at
fault. Scott's company is located about
Group,
Forgive me if this subject has been covered before but I am finding it very
hard to determine the EXACT regulatory requirements for the states. As far as I
understand it is the responsibility of the installer or business using
electrical equipment to ensure that it satisfies the
Replace the load with a resistor, turn off the power, record the decay on a
storage scope and compute the RC time constant.
Richard Woods
--
From: Brian Kunde at LECO [SMTP:bkundew...@qtm.net]
Sent: Wednesday, November 17, 1999 4:00 PM
To: IEEE Group
Hi Members
In the latest edition of IEC 79-11 (Intrinsic safety) the gas mixtures
were changed from the 1991 edition to use only hydrogen and air or Oxygen
in the mixture. Has anybody started to use this method and do you also
experience a more violent explosion during the calibration of the
Mike,
We have a TNV3 ISDN interface on most of our products.
We hand place and route the isolated circuitry, then generate
a keep out area, on all layers, with a generous spacing round
all the tracks and pads.
The autorouter then has the rest of the board to play with.
Regards,
Geoff Lister
The gas mixture in IEC60079-11 that uses oxygen is an option. You are still
able to use the 21 +/- 2% that is quoted in 10.1.2 of the standard. The 30%
H2, 53% Air, 17% N2 is to allow you to put the safety factor on the gas
mixture instead of putting it on either the voltage or current. The
Hi group
Most of you experienced ball droppers probably already know this but for
those of you that are new to the game I thought I should share this handy
hint with you...
Buy some ordinary drain pipe from your local hardware store and cut it to
length the same as the height you need to drop
Laura
BS1363, table 2 gives the maximum fuse rating for certain sizes of cable.
Cord sizeRated current Fuse rating
0.50mmsq 3A 3A(5A)*
0.75mmsq 6A 13A
1mmsq 10A 13A
1.25mmsq 13A 13A
1.50mmsq 13A
From IEC 74/510/CD, draft amendment to IEC 60950,
Material flammability classifications,
HBF replaced by FH-3. The new definitions are not in all
cases identical to the earlier ones.
I imagine the -40 in the FH3-40 you refer to is the burning
rate of 40mm/min specified for HBF.
A certain
Is this an advert..?
-Original Message-
From: Nezam Najafi [mailto:nezam.naj...@madge.com]
Sent: Wednesday, November 17, 1999 9:58 PM
To: 'emc-p...@ieee.org'
Subject: ISDN Access Switch for LAN/WAN
To All:
I was wondering if there is
Sorry to add to the confusion, but the British trade
association FEI publishes a document on periodic
safety checks for business equipment, which includes
a table of conductor sizes and fuse sizes
for British plugs, with the following note:
BS 1363 specifies only the use of 3 A or 13 A fuses.
In IEC 61000-6 series, the sections 1 to 4 are published,
but Cenelec has adopted only the section 2 that will replace the old
EN 50082-2.
It is not likely that the rest will be adopted by Cenelec since IEC have
actually copied them from the latest Cenelec generics, so why bother.
However, the
Can anyone tell me where I can find the corresponding UL non flammable
material of FH3-40 required in EN60065 (referenced to IEC60384-1). The
material suppliers in the Far East are more familiar with UL materials than
European materials.
Thanks,
Raymond Li
-
This message is coming
Hello Chaps,
We are making a batch of test boxes that will be used during the
development of our main products. They will be CE marked (of course).
Some will be sent to our factory in Mexico.
Now, the question is, do these test boxes need to go through the NOM
approvals process?
They will
Much clearer. I agree totally. The only justification for either
MIL-STD-461-like or CISPR 22-like CE control is operation of sensitive radio
receivers from or near the power bus. Absent that, only normal time domain
power quality ripple limits need be applied.
--
From: Brumbaugh,
Derek: In the US (or Canada) I am not aware of any FCC or I.C.
documents that limit conducted emissions from the output of a power
supply or battery charger. In Europe, for CE Mark purposes, you
definitely need to have a look at the applicable EN's, because some of
them do have requirements for
George and PSNet,
Ahh... this triggers a similar situation from a past life
seems that the company had specified the use of the IEC colors for all
power cords... but the supplier thought that since the power plug was
moulded-on the color of the internal wires didn't matter and
Hi Laura,
You can fit a 3 amp fuse in the fuse safely unless you have other technical
specification on your product, i.e., high inrush current required. With
0.75 sq mm cord given, the maximum permissible current is 6A but the
harmonised standard allows 10A in line with other European
Hi Nick,
Many thanks for your time and explaination that gives me a new view of UK
fused plug.
Best regards,
Raymond Li
=
Nick Rouse 100626.3...@compuserve.com on 18/11/99 06:13:48 a
To: Raymond Li/DixonsNotes
cc:
Subject:
Hi John,
Sorry to ask such a big question. In fact, this is my first time to hear
such technical explaination about why UK plug must be fused so I believe I
can ask a right person for this question. In the past, I got a common
answer from UK people saying that the UK mains plug is the most
Scott,
I presume you mean Halon, not halogen. Sorry, but Halon systems are
neither invisible nor odourless. When you set one off, the room fills with
a smoky haze that has quite a strong odour. I presume that this is due to
additives that are included for the very purpose of making it
Good question.
Have you posted tosci.electronics.cad group to see what their
answers were?
- Robert -
-Original Message-
From: Rains,Mike mra...@foxboro.com
To: 'emc-p...@ieee.org' emc-p...@ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Wednesday,
Hi Laura.
You mention wire type:
HO3VVF3G0.75
This looks like 0.75mm2 cross section area cable, and should be protected
by a 5A fuse.
Chris Duprés
Surrey, UK.
-
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Dear Laura et al.
I wasn't sure if it was yourself or someone else that had asked about
worldwide electricity supply voltages and frequencies. Anyway a brief
list can be viewed at the following link :
http://www.ets-tele.com/tics/global/volt_freq.htm
Best regards,
Edward Fitzgerald
Director
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