Robin,
Your question consists of many parts and here is the answer to some of the
parts.
UL and other agencies measure creepage/clearance using the working voltages
in a few places mainly across the isolation barrier. You then use the peak
and RMS values that you have obtained and then calculate
John: Sorry I can't help, but I am interested in what replies you get.
I also wonder what force the Decision carries. Is it a mandatory part
of the Low Voltage Directive? How does it relate to the LVD or to the
various EN's in force under the LVD?
Thanks in advance for any light you can shed
Erik;
I have used IEC 1000-4-4:1995. EN should be muich the same.
In section 8.2 Execution of the test - The test plan shall specify -
sequence of application of the test voltage to the EUT's ports, each one after
the other or to cables belonging to more than one circuit, etc.
I have
Does anyone have information regarding regulatory approval requirements
in Columbia?
Thanks,
Erik D. Collins
EMI/EMC Approvals Engineer
LXE Inc.
125 Technology Parkway
Norcross, GA 30092
USA
Phone 770-447-4224 x3240
Fax 770-447-6928
Check out our website @:
http://www.lxe.com
Greetings to all:
I am interested in finding out who usually acts as the Signatory
for a EC Declaration of Conformance for a US based manufacturer.
Thanks in advance,
Bill Jacowleff
VDO Control Systems
Place all cables in the clamp together I agree the standard is not
clear, but the intent was always that all the I/O cables be placed in the
clamp together.
The idea is to simulate transients being coupled between lines in cable
trays, especially where noisey ac lines are run near or
During a recent re-model at home I decided to replace the ceiling lamp in
the dining room. Reading the instructions for the new lamp it stated:
Warning, light fixture to be connected to wiring rated 80 degrees C. Most
home older than 1985 will have 60 degree C wiring. Consult a qualified
EN 55103-1:1997 (immunity) and EN55103-2:1997 (emissions) are the product
family standards for audio, video, audio-visual and entertainment lighting
control apparatus for profession use. CISPR 13, 14 and 22 and are listed as
normative references.
--
From: Art Michael
Dear all,
We have designs for ferrite transformers need to be compliant
to UL1950. However, some concepts still confused me,
(1) How do UL define the creepage distance?
(2) We use marginal tapes for the primary winding and
the interwinding also. Then do we need to add
marginal tapes
Hi Kevin,
CKC Laboratories, Inc. is one of the few labs in the United States that is
accreditated through DATech that can perform the required tests for type
approval of such devices. I-ETS 300 422 is one of the standards used for
testing wireless microphones. CKC Laboratories, Inc. is
All:
I have received a copy of a CENELEC Decision (dated 6/98) regarding the use
of varistors between mains conductors and ground. This particular Decision
is written in a rather unclear fashion (at least its unclear to me...I tend
to be rather literal in my interpretations of written
Hello Group,
Could any lab that is accredited to perform the following Australian
Standards please contact me directly
AS3100
AS3108
AS1931.1
Regards,
Kevin Harris
Manager, Approval Services
Digital Security Controls
1645 Flint Road
Downsview, Ontario
CANADA
M3J 2J6
Tel +1 416 665 8460
When performing EFT/B on signal and control lines using the capacitive
coupling clamp, should you:
1. Place all cables in the clamp together
2. Place all cables in the clamp independently
3. Both
Thanks
Erik D. Collins
EMI/EMC Approvals Engineer
LXE Inc.
Phone
Good Morning,
Can anyone tell me what the requisite IEC and/or EN standard/s for Stage
Lighting and Automation Controls are ?
ThanX and regards,
Art Michael
Happy Holidays to All
* * * * * * * * * * * * * * * * * * * * * *
* International Product Safety
Kevin,
EN55103-1 EN55103-2 are the product specific standards for pro audio
equipment, if it's not professional equipment then the generics EN50081-1,
EN50082-1 will do. Don't forget the transmitter is only allowed to transmit at
one frequency! and can be interfered with so therefore the
Peter,
We are checking with Dupont's expert to see if what we are
concerned now for the 600V or 300V system refers to the
input voltage (primary winding voltage) only. Perhaps you
are right, thanks. But if you can cite any good source
to support this, that would be much helpful to us.
For the
Try:
http://www.safetyshop.com/
searching on drawer yielded attached which is a blue circle with
white ! mark and wording - Open only one drawer at a time -
Chris
-Original Message-
From: Russell, Ray [mailto:ray_russ...@gastmfg.com]
Sent: Friday, December 11, 1998 8:40 PM
To: 'IEEE
Hello,
Does anyone have any information regarding how microphones are covered by
European EMC requirements and regulations. I understand 89/392/EEC does
not mention microphones but as most regulations/standards do not provide a
definitive listing of all products types covered I am wondering if
Dear All,
We have a customer with an equipment with interconnecting
coaxial type cable carrying 5kV supplied from the secondary of a
Recognized high voltage power supply.
1. Is anyone familiar with a 5kV UL/CSA Listed/Certified coaxial
type cable?
2. Is anyone familiar with a 5kV European
Dear Robin,
If I'm not mistaken the 300 V or 600 V rating for Insulation Systems
per UL1446 is for primary supply voltage and not for the maximum
voltage in any winding.
You state that the transformer is being designed for a 200 C rating.
Remember that you need only comply with UL1446 if your
Dear Moshe,
It seems you wish to comply with ESD requirements. However,
supressor will most probably not be suitably rated to pass the
Dielectric Voltage Withstand Tests in EN 60 950.
Best Regards
From: mvald...@netvision.net.il
Date sent: Mon, 9 Nov 98
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