any insight appreciated

[Cefalo, Lisa]

 
 Hello all,
 
I was wondering if any of you may have some insight or experience 
 or recommendations about the following dilemma:   We use a rather 
 complex keypad/front panel on one of our pieces of equipment.  This 
 panel, in it's manufacture, consists of several different layers, 
 polycarbonate, adhesive. etc..  One of these layers is a shielding 
 material spec'd at 10ohms per square.  We would like to go to a 20 
 ohms per square material but are cautious about the potential effects 
 on the EMC characteristics (emissions, esd, etc.).  The window itself 
 is grounded by contact with a silver mesh which in turn is grounded 
 via conductive cement to studs that attach to the metal bezel.  I 
 expect in comparison with the actual resistance of the ground path  
 the change from 10 to 20 ohms is small.  
 
In the interest of time and money, the debate is to re-test or not, 
 and which tests...  Any comments or help would be appreciated.
 
 Thank you,
 
 Lisa
 
 cefa...@mksinst.com

application of multiple standards

[Bailey, Jeff]

Hello group,

I have a few questions but first I think they require some
background.

Our company is manaufacturing a daughter card for use in an
industrial control environment.  Being that it is intended for use in
industrial control networks and will be operating in conjunction with
PLC's, we are applying EN61131-2 and FCC class A.  The card will not
function on its own so the purchaser is responsible for building a
compatible host.  I don't see a problem so far.  

But, we also can provide a development kit that includes an evaluation
board that acts as a host to assist the purchaser in the design of their
product (most likely to take place in a lab or office environment).  So
I see the evaluation board more fitting to EN60950 and FCC class B
limits.  In this application the above mentioned daughter card is also
required, and now seems fitting to EN60950 and FCC class B limits.

Now the questions,

1: Can we apply the CE mark to the daughter card even though it does not
operate on its own and therefore is not an end product?

2: Can we apply EN61131-2 as well as EN60950 in order to satisfy both
applications (can we list both of these on the DOC), does this create
some sort of conflict?  Do we have to apply both?

3: Can we use our eval board (intended for development purposes) as a
host for our testing of the daughter card to EN61131-2?  At this point
no other host is available.

Any comments and suggestions are greatly appreciated.

Thanks

Jeff Bailey
Regulatory Compliance
SST
jbai...@sstech.on.ca
<>

RE: Safety Requirements in South Africa

[Grant, Tania]

 Richard,
 
 My 1996 information is that the safety standard is ARP 031, which
is 
 based on IEC 950.  I do not have the ARP standard and, therefore,
do 
 not know what additional deviations apply.  However, I have a 
 statement from SABS that a CB test report to IEC 950, WITH
Australian 
 deviations, will not require any additional testing.  A standard CB

 test report will require "reduced" testing.  

 SABS also states that for EMC, CISPR 22 is the relevant standard.
 I understand that they may or may not accept a test report from 
 another test house;-- they will charge money to evaluate the test
 report.

 I do not know whether any mandatory markings are required.  My gut
 feel is that for safety and EMC, none should be required, since
they
 will (or can) accept reports from other laboratories.

 The only address I have is:

  SABS:  South Africa Bureau of Standards
 1 Dr Lategan Road
 Groenkloof, Pretoria
 TEL:  012 428 7911
 FAX:  012 344 1568

 Attention:  Lizette de Vries-Venter, Support Engineer
 Electronics and Appliance Division

 Tania Grant, Lucent Technologies, Octel Messaging Division
 tgr...@lucent.com

__ Reply Separator
_
Subject: RE: Safety Requirements in South Africa
Author:  "Mel Pedersen" [SMTP:mpeder...@sun1.anza.com] at CORP
List-Post: emc-pstc@listserv.ieee.org
Date:3/25/98 10:24 AM


Hello Richard:  I have always had poor luck when trying to contact
overseas
agencies (aside from BABT or BSI).  I would suggest contacting UL's
International Compliance Services.  I spoke with a Kristin Dubinski at
the
Northbrook Office (847) 272-8800 x 42590.  She has been very helpful a
few
times.  I am sure CSA or BSI would be good help also.

Mel PedersenMidcom, Inc.
Homologations Engineer Phone:  (605) 882-8535
mpeder...@midcom.anza.com  Fax:  (605) 886-6752


--
From:  WOODS, RICHARD[SMTP:wo...@sensormatic.com]
Sent:  Wednesday, March 25, 1998 7:51 AM
To:  'emc-pstc'
Subject:  Safety Requirements in South Africa

My correspondence to the South African Bureau of Standards (SABS) is not
being answered. So far, the only item of information that I have some
faith in is that safety compliance is required for ITE and the standard
is IEC950 + national deviations). Does anyone have any up-to-date
information on the following questions?

* What is the legal basis (document) upon which SABS claims that
compliance is mandatory? How can I obtain a copy of that document?
(trust but verify).

* How can I obtain a copy of the national deviations?

* Is it mandatory that a safety test report be submitted to SABS
as a precondition for import? If so, do they accept TUV test reports to
EN 60950, or is a CB type report mandatory?

* If submittal is required, does SABS issue a license? If so, is
factory surveillance a requirement?

* Are there any mandatory compliance marks?

* Must some type of documentation be presented at customs to
demonstrate safety compliance? If so, what?

* On all of these activities, what roll, if any, must be
undertaken by a local representative?

What is the best contact at SABS concerning these and similar questions?

Richard Woods
Sensormatic Electronics
wo...@sensormatic.com

Re: Yellow-green ground wire

[Doug . Kealey]

 Ed,
 
 Olflex Wire & Cable Inc.
 Fairfield NJ
 800-353-3539
 
 They have HAR cordage in green/yellow.  I don't remember the cost per 
 meter.  And if your end-product safety standard requires a minimum 
 30/70 yellow-to-green coverage ratio, this vendor has it.
 
 Doug Kealey
 Scientific Atlanta
 Atlanta GA


__ Reply Separator _
Subject: Yellow-green ground wire
Author:  jan...@poster.cae.ca at PMDF
List-Post: emc-pstc@listserv.ieee.org
Date:3/25/98 11:01 AM


Dear compliance colleagues,
 
does anyone know of a Canadian or U.S. manufacturer or supplier of 
yellow-green jacketed European-style ground wire?
 
One Euro supplier is charging something like $15 per meter!
 
Thanks for any suggestions.
 
 
Ed Janzen, Compliance Engineer
CAE Electronics
Montreal, Canada
E-mail: jan...@cae.ca


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Subject: Yellow-green ground wire
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Re: Safety Requirements in South Africa

[Rich Nute]

Hi Richard:


>   *   What is the legal basis (document) upon which SABS claims that
>   compliance is mandatory? How can I obtain a copy of that document?
>   (trust but verify).

Here is what the SABS web page says about "mandatory"
standards:

 "In terms of the Standards Act, a number of standards have
 been declared compulsory by the Minister of Trade and
 Industry. These standards mainly concern safety and health,
 and are therefore legally applicable to a wide variety of
 products ranging from car parts to certain foodstuffs.

 "Compulsory specifications are administered by the SABS on
 behalf of the State. The products concerned are tested
 regularly for compliance with legal requirements. If it is
 necessary, an embargo is placed on the sale of products that do
 not comply with relevant standards."

 http://www.sabs.co.za/

So, it would seem to me that you need a copy of the South
Africa Standards Act.  I would suppose that you could get
a copy through SABS.


Best regards,
Rich



-
 Richard Nute Senior Product Safety Engr
 Hewlett-Packard Company  
 AIO Division Tel   :   619 655 3329 
 16399 West Bernardo DriveFAX   :   619 655 4979 
 San Diego, California 92127  e-mail:   ri...@sdd.hp.com 
-

Re[2]: IEC 825-1

[martinjp]

 Steven,
 
 The United States laser safety standard 21 CFR 1040 is regulated by 
 the FDA/CDRH (Center for Devices and Radiological Health).
 
 The CDRH website is www.fda.gov/cdrh/index.html
 
 Good luck.
 
 Joe Martin
 EMC/Product Safety Engineer
 P.E. Applied Biosystems
 marti...@perkin-elmer.com
 
 


__ Reply Separator _
Subject: RE: IEC 825-1
Author:  "WOODS, RICHARD"  at INTERNET
List-Post: emc-pstc@listserv.ieee.org
Date:3/25/98 1:15 PM


look in Title 21 Code of Federal Regulations (CFR) Parts 1002 and 1040. 
You can find the CFRs on the web at the US Library of Congress. I'm not 
sure of the address, but you can find it by doing a search on CFR.
 
> --
> From:  Steven Goulding[SMTP:sgould...@cambriansys.com] 
> Sent:  Tuesday, March 24, 1998 4:37 PM
> To:  'emc-p...@majordomo.ieee.org' 
> Subject:  IEC 825-1
> 
> Can anyone tell me what the FCC equivalent to the IEC 825-1 standard 
> regarding lasers.
> 
> Thank you in advance for any of your help 
> 
> 
> Steven Goulding 
> EMC Compliance Specialist 
> Cambrian Systems Corp
> 555 Legget Drive
> Kanata, Ontario  K2K 2X3
> www.cambriansys.com
> 
> Tel: (613) 599-6060 Ext. 2672
> Fax: (613) 591-2035
> E-mail: sgould...@cambriansys.com
> 
> where  BANDWIDTH   means business 
> 

Measuring the Noise level of an ITE PC or Workstation

[Kamran Mohajer]

Fellow Engineers,

I would like to find out what standard is being used for measuring noise
levels for ITE equipment these days.  In particular, I am interested in
noise level measurement for PCs and workstations.  Are there any labs in the
northern California or in California that could do this test?  I would
appreciate your input on this matter.

Regards, 

Kamran Mohajer, M.Sc.
Staff Engineer
NeTpower Inc.,
545 Oakmead Parkway
Sunnyvale, CA 94086
Tel:408-522-5185
Fax:408-522-4135
kamran_moha...@netpower.com

Re: IEC 825-1

[israel_yeshurun]

 
 
 Steven Hi
 
 It is 21CFR (Code of Federal regulations) Part 1040
 
 Regards  


__ Reply Separator _
Subject: IEC 825-1 
Author:  Steven Goulding   at internet
List-Post: emc-pstc@listserv.ieee.org
Date:24/3/98 4:37 PM


Can anyone tell me what the FCC equivalent to the IEC 825-1 standard 
regarding lasers.
 
Thank you in advance for any of your help
 
 
Steven Goulding 
EMC Compliance Specialist 
Cambrian Systems Corp
555 Legget Drive
Kanata, Ontario  K2K 2X3
www.cambriansys.com
 
Tel: (613) 599-6060 Ext. 2672
Fax: (613) 591-2035
E-mail: sgould...@cambriansys.com
 
where  BANDWIDTH   means business
 
 

RE: Safety Requirements in South Africa

[Mel Pedersen]

Hello Richard:  I have always had poor luck when trying to contact overseas 
agencies (aside from BABT or BSI).  I would suggest contacting UL's 
International Compliance Services.  I spoke with a Kristin Dubinski at the 
Northbrook Office (847) 272-8800 x 42590.  She has been very helpful a few 
times.  I am sure CSA or BSI would be good help also.

Mel PedersenMidcom, Inc.
Homologations Engineer Phone:  (605) 882-8535
mpeder...@midcom.anza.com  Fax:  (605) 886-6752


--
From:   WOODS, RICHARD[SMTP:wo...@sensormatic.com]
Sent:   Wednesday, March 25, 1998 7:51 AM
To: 'emc-pstc'
Subject:Safety Requirements in South Africa

My correspondence to the South African Bureau of Standards (SABS) is not
being answered. So far, the only item of information that I have some
faith in is that safety compliance is required for ITE and the standard
is IEC950 + national deviations). Does anyone have any up-to-date
information on the following questions?

*   What is the legal basis (document) upon which SABS claims that
compliance is mandatory? How can I obtain a copy of that document?
(trust but verify).

*   How can I obtain a copy of the national deviations?

*   Is it mandatory that a safety test report be submitted to SABS
as a precondition for import? If so, do they accept TUV test reports to
EN 60950, or is a CB type report mandatory?

*   If submittal is required, does SABS issue a license? If so, is
factory surveillance a requirement?

*   Are there any mandatory compliance marks?

*   Must some type of documentation be presented at customs to
demonstrate safety compliance? If so, what? 

*   On all of these activities, what roll, if any, must be
undertaken by a local representative?

What is the best contact at SABS concerning these and similar questions?

Richard Woods
Sensormatic Electronics
wo...@sensormatic.com

Yellow-green ground wire

[Ed Janzen]

Dear compliance colleagues,

does anyone know of a Canadian or U.S. manufacturer or supplier of
yellow-green jacketed European-style ground wire?

One Euro supplier is charging something like $15 per meter!

Thanks for any suggestions.


Ed Janzen, Compliance Engineer
CAE Electronics
Montreal, Canada
E-mail: jan...@cae.ca

More metrics - Japan

[Mike Morrow]

Ok, here is what I've found out about metrics in Japan.  Thanks to all 
who responded to my previous post.  This comes from The US Department of 
Commerce and the US Small Business Administration.  My question to them 
was based on measurement of pressure, but I believe that most other units 
of measure will be required to change.

Here goes:

"First, at present, the Japanese Measurement Law (No. 51), commonly known 
as Keiryoho, requires transducers which are imported for purpose of 
distribution in Japan must have either metric units or PASCAL unit 
display.  However, because of the revision in the law which became 
effective in November, 1993, these two units are to be integrated into 
PASCAL only by September 30, 1999.  The major purpose of the 1993 
revision was to consolidate the Japanese measurement units into SI."

I think that something was lost in the translation.  Their message states 
metric or PASCALS (metric unit), but I think the meant to state PSI in 
there somewhere.  Anyway they gave a contact for more info.

Mr. Yuichi Shirakawa
Director, International Division
Japan Quality Assurance Association (JQA)
2-17-22, Alasaka, Minato-ku, Tokyo 107-0052
Phone: 03-3584-9366
FAX: 03-3584-4964

It looks like that if Europe doesn't get us with SI units that Japan 
will.  I have a message in to Mr. Yuichi Shirakawa and will post any 
further info that I get.

Mike Morrow
Product Standards Engineer
Data Instruments
mike_mor...@datainstruments.com
mmor...@compuserve.com
Phone 978-264-9550 xt-201
Fax 978-263-0630

RE: CE and/or e-mark for products operated in vehicles (2)

[Frazee Doug]

My first response on EMC-PSTC was a bit misleading!  For ITE and other portable 
devices with cigarette lighter power adapters, 95/54/EC testing is required.  
However, 95/54/EC should not be listed as a directive on the Declaration of 
Conformity.  It should be listed as a technical standard under the EMC 
Directive.  Since 95/54/EC is not a "new approach directive" it may not be used 
directly for CE marking.  

For CE marking, the EMC Directive guidelines, para. 15.3 allows the use of 
95/54/EC to demonstrate conformity with the EMC Directive.  The technical 
requirements are within 95/54/EC, and no harmonized test specs. are listed nor 
required.  95/54/EC covers both vehicle EMC testing and EMC of electronic 
sub-assemblies (ESA).  ESAs are defined as electrical or electronic devices 
intended to be "part of a vehicle."  Therefore, portable devices with cigarette 
lighter power adapters are not ESAs and will not require e-marking.  Therefore, 
for ITE with power adapters that may be used in an automobile, the declaration 
of conformity should list the Low Voltage and EMC Directives.  Specific 
standards under the EMC Directive would typically be EN 55022, EN 50081-2 and 
95/54/EC.  Under 95/54/EC, immunity testing is not required for "ESAs whose 
functions are not involved in the direct control of the vehicle."  Therefore, 
additional testing under 95/54/EC will involve only NB and BB radiated!
 emissions tests that may be performed either on an OATS or in an anechoic 
chamber.  These tests may be performed in conjunction with the EN 55022 tests, 
limiting the additional cost impact.  1m antenna spacing is used, quasi-peak 
detection for the BB test, peak or average for NB.  ISO 7637-1 automotive 
powerline transient immunity tests are recommended, but not specifically called 
out under the EMC Directive framework.

If e-marking is required, the device is by definition either a motor vehicle or 
an ESA that becomes part of a motor vehicle.  Conformity must be demonstrated 
by type testing, witnessed by a Notified Body under 95/54/EC.  The Notified 
Body may impose other requirements such as ISO 7637-1 powerline transient 
testing.  ESD testing is discussed in paragraph 8.4 of 95/54/EC and should not 
be required for either ESAs or for motor vehicles.

Doug Frazee
EMC Compliance Engineer
Windermere Information Technology Systems
MILCOM Compliance Laboratories (MCL) division
401 Defense Highway
Annapolis, MD  21401
USA
(410) 266-1793
(410) 266-1751 FAX
dfra...@windermeregroup.com
-Original Message-
From:   andreas.tho...@toshiba-teg.com [SMTP:andreas.tho...@toshiba-teg.com]
Sent:   Tuesday, March 24, 1998 8:54 AM
To: emc-p...@majordomo.ieee.org
Subject:CE and/or e-mark for products operated in vehicles (2)


Dear compliance colleagues,

thank you for your comments which I have received until now.
The problem is the appliance of the e-mark directive on products which are
not intended to be fitted (permanently installed) into a car, like a laptop
computer or handy. This seems to be once more a "grey area" which is not
clearly defined by the people creating those directives.
Have anyone of you seen comments listed up in the operating instructions of
a vehicle which do not allow to operate electronic products in the car
environment without observing e-mark or other specified requirements  ??

Kind regards

Andreas Thomas
Toshiba Europe

Safety Requirements in South Africa

[WOODS, RICHARD]

My correspondence to the South African Bureau of Standards (SABS) is not
being answered. So far, the only item of information that I have some
faith in is that safety compliance is required for ITE and the standard
is IEC950 + national deviations). Does anyone have any up-to-date
information on the following questions?

*   What is the legal basis (document) upon which SABS claims that
compliance is mandatory? How can I obtain a copy of that document?
(trust but verify).

*   How can I obtain a copy of the national deviations?

*   Is it mandatory that a safety test report be submitted to SABS
as a precondition for import? If so, do they accept TUV test reports to
EN 60950, or is a CB type report mandatory?

*   If submittal is required, does SABS issue a license? If so, is
factory surveillance a requirement?

*   Are there any mandatory compliance marks?

*   Must some type of documentation be presented at customs to
demonstrate safety compliance? If so, what? 

*   On all of these activities, what roll, if any, must be
undertaken by a local representative?

What is the best contact at SABS concerning these and similar questions?

Richard Woods
Sensormatic Electronics
wo...@sensormatic.com

RE: IEC 825-1

[WOODS, RICHARD]

look in Title 21 Code of Federal Regulations (CFR) Parts 1002 and 1040.
You can find the CFRs on the web at the US Library of Congress. I'm not
sure of the address, but you can find it by doing a search on CFR.

> --
> From: Steven Goulding[SMTP:sgould...@cambriansys.com]
> Sent: Tuesday, March 24, 1998 4:37 PM
> To:   'emc-p...@majordomo.ieee.org'
> Subject:  IEC 825-1
> 
> Can anyone tell me what the FCC equivalent to the IEC 825-1 standard
> regarding lasers.
> 
> Thank you in advance for any of your help
> 
> 
> Steven Goulding   
> EMC Compliance Specialist 
> Cambrian Systems Corp
> 555 Legget Drive
> Kanata, Ontario  K2K 2X3
> www.cambriansys.com
> 
> Tel: (613) 599-6060 Ext. 2672
> Fax: (613) 591-2035
> E-mail: sgould...@cambriansys.com
> 
> where  BANDWIDTH   means business
> 

AW: update on Metric Directive

[Thomas, Andreas -425]

For your info:

> Council Directive 80/181 (and the amendments 85/1 and 89/617) "on the
approximation of the laws of the Member States relating to units of
measurement and on the repeal of Directive 71/354/EEC" (as amended) does
indeed provide for phasing out of "supplementary units" (i.e. units
other than those of the "international system of units" or "SI") by
December 31, 1999 in Article 3 (2). <

Kind regards

Andreas Thomas
Toshiba Europe

--
Von:  WOODS, RICHARD [SMTP:wo...@sensormatic.com]
Gesendet:  Dienstag, 24. März 1998 19:37
An:  emc-p...@ieee.org; 'Eric Henning'
Betreff:  RE: update on Metric Directive

What is the official number of this directive?
<>

Re: Required "number of pulses per minute"

[Ing. Gert Gremmen]

Hello John and group,

All Surge standards do stop at maximal 1 pulse per minute, BTW most  surge
generators
for compliance to this standard cannot generate much more then 1 pulse per
25-35 seconds.  IEC 1000-4-5 at page 19 lists the req. for surge generators.

Open circuit voltage0,5 -- 4.0 kV
Tolerance  10%
Waveform: surge  1.2/50 and 8/20 uS  voltage/current
resp.
SC current   : 0.25 kA to 2.0 kA
Tolerance 10%
Polarity  pos/neg
Phase shifting  : 0-360 degrees from LINE
Output impedance 2 ohm
Repetition rate :  at least 1 per min

So a generator giving 1 pulse per minute suffices for testing acc. to this
standard.

Standards can be bought at every standardization institute in Europe.

Try f.i. the Dutch NNIhttp://www.nni.nl




Regards,

Gert Gremmen Ing.

---
== Ce-test, Qualified testing ==
Consultants in EMC, Electrical safety and Telecommunication
Compliance tests for European standards and ce-marking
Our Web presence: http://www.cetest.nl





-Oorspronkelijk bericht-
Van: Dudek, John 
Aan: 'emc-p...@majordomo.ieee.org' 
Datum: woensdag 25 maart 1998 7:08
Onderwerp: Required "number of pulses per minute"


> Hello everyone,
>
> Maybe someone in the group knows the following information.
>
> IEC 1000-4-5 (and the European Norm EN 61000-4-5) prescribes
>tests for simulating the effects of voltage surges caused by switching
>disturbances in the power station. I am trying to identify the "number
>of pulses per minute" when applying test surges to industrial
>equipment." My searching has resulted in the following answers:
>
>1. "at least one per minute"
>2. "6 pulses per minute"
>3. "10 pulses per minute"
>4. "12 pulses per minute"
>
>I have also been told that there is a new edition of EN 500082-2 (issued
>1997) that might provide this information.  However, the usual
>documentation sources only have the 1995 edition of this standard.
>
>My two questions are:
>
>1. Where can I find the "number of pulses per minute" defined for
>industrial equipment when applying IEC 1000-4-5 or EN 61000-4-5 ?
>Or does anyone know this number?
>
>2. Does anyone have a 1997 edition of EN 500082-2 ?  If you do,
>where were you able to purchase it??
>
> Thanks to anyone that can offer their input.
>
>John F. Dudek
>Manager, Product Safety Engineering
>Corcom Inc.
>Libertyville, Ill. USA
>voice: 847-680-7400, ext. 134
>fax: 847-680-8169 (general) or 847-680-0340 (direct)
>Mailto:jo...@cor.com
>Visit us at http://www.cor.com
>
>

Re: Is there a Standard for IC manufacturers to assess EMC immunity on a chip level.

[Ing. Gert Gremmen]

hello kevin and group,

The topic you adress is very interesting indeed.  There is no such however.

As may be all of you know or should know is that EMI aspects are dependend
of the applied logic families, or in general:  the applied IC technology.
This rises the problem of replacing IC's by equivalent from other manufs.
Especially for logic family circuits it should be of great help if on gate
level their EMI specifications were guaranteed and put into classes.

Parameters to be classified are : for EMI-purposes:  risetime , short cicuit
time , output impedance, supply to in/out isolation for HF signals etc.

In this way  the applied logic family could be replaced from one out the
same EMI-class, therefore guaranteeing EMC-performance.

What do group members think of this ! Are there any chip manufacturers
working on this ?

Regards,

Gert Gremmen ing.

---
== Ce-test, Qualified testing ==
Consultants in EMC, Electrical safety and Telecommunication
Compliance tests for European standards and ce-marking
Our Web presence: http://www.cetest.nl




-Oorspronkelijk bericht-
Van: Kevin Harris 
Aan: EMC-PSTC (E-mail) 
Datum: woensdag 25 maart 1998 7:08
Onderwerp: Is there a Standard for IC manufacturers to assess EMC immunity
on a chip level.


>Hello Group,
>
>Does anyone know if there is a common standard used by IC manufacturers
>to assess EMC immunity on the chip level. I'm thinking of commercial
>chips here not military applications. Thanks for your help
>
>
>Kevin Harris
>

AW: Required "number of pulses per minute"

[Thomas, Andreas -425]

John,

I checked EN50082-1:1997 which also refers to EN61000-4-5, but I did not
find any information about the repetition rate.
Checking EN61000-4-5:1995 I found only the information: At least one per
minute.

Kind regards

Andreas Thomas
Toshiba Europe

--
Von:  Dudek, John [SMTP:jo...@cor.com]
Gesendet:  Dienstag, 24. März 1998 23:55
An:  'emc-p...@majordomo.ieee.org'
Betreff:  Required "number of pulses per minute" 

Hello everyone,

Maybe someone in the group knows the following information.
IEC 1000-4-5 (and the European Norm EN 61000-4-5) prescribes
tests for simulating the effects of voltage surges caused by switching
disturbances in the power station. I am trying to identify the "number
of pulses per minute" when applying test surges to industrial
equipment." My searching has resulted in the following answers:
1.  "at least one per minute"
2.  "6 pulses per minute"
3.  "10 pulses per minute"
4.  "12 pulses per minute"

I have also been told that there is a new edition of EN 500082-2
(issued 1997) that might provide this information.  However, the usual
documentation sources only have the 1995 edition of this standard.
My two questions are:
1.  Where can I find the "number of pulses per minute"
defined for industrial equipment when applying IEC 1000-4-5 or EN
61000-4-5 ?  Or does anyone know this number?
2.  Does anyone have a 1997 edition of EN 500082-2 ?  If you
do, where were you able to purchase it??

Thanks to anyone that can offer their input. 
John F. Dudek
Manager, Product Safety Engineering
Corcom Inc.
Libertyville, Ill. USA
voice:  847-680-7400, ext. 134
fax:847-680-8169 (general) or 847-680-0340 (direct)
Mailto:jo...@cor.com  
Visit us at http://www.cor.com  
<>

AW: IEC 950 and amendments

[Thomas, Andreas -425]

Steven,

we purchased the IEC950 (printed 1996) including all amendments (1 - 4).
The third edition of IEC950 is expected to be published by the end of
1998.
If you are interested in the correlation between IEC950 and EN60950 I
can fax you some further information which we tried to find out asking
CENELEC. Please let me know.

Kind regards

Andreas Thomas
Toshiba Europe


--
Von:  Steven Goulding [SMTP:sgould...@cambriansys.com]
Gesendet:  Dienstag, 24. März 1998 20:25
An:  'emc-p...@majordomo.ieee.org'
Betreff:  IEC 950 and amendments

I am about to purchase IEC 950 and what I would like to know is
that it
necessary to purchase IEC 950 along with its 3 amendments, or
can I save
a little money and not purchase 1 or 2 of the amendments. Is
amendment 3
just additional information to IEC 950 or does it include all
the
information that is in IEC 950

Regards,

Steven Goulding 
EMC Compliance Specialist 
Cambrian Systems Corp
555 Legget Drive
Kanata, Ontario  K2K 2X3
www.cambriansys.com

Tel: (613) 599-6060 Ext. 2672
Fax: (613) 591-2035
E-mail: sgould...@cambriansys.com

where  BANDWIDTH   means
business
<>

RE: Required "number of pulses per minute" according to IEC 1000- 4-5

[Niels Hougaard]

To the 2 questions:
Question1: Where can I find the "number of pulses per minute" defined for
industrial equipment when applying IEC 1000-4-5 or EN 61000-4-5 ?
Or does anyone know this number?

Answer: When testing according to IEC 1000-4-5/1995 the repetition rate
shall be maximum 1/min (§8.2); whereas the generator used shall be able to
supply a repetition rate of "at least 1 per min" (§6.1.1 and §6.2.1).

Question2: Does anyone have a 1997 edition of EN 500082-2 ?  If you do,
where were you able to purchase it??
Answer: There is no approved 1997 edition of EN 50082-2. But in 1997 there
came a new revised edition of EN 50082-1   -   maybe that could be the
reason for a little confusion.

Hope this helps

Niels Hougaard, EMC Engineer
Barco AS / Communication Systems
Denmark
niels.houga...@barco.com
Tel: + 45 3917 
Fax: + 45 3917 0010

> -Original Message-
> From: Dudek, John [SMTP:jo...@cor.com]
> Sent: 24. marts 1998 23:55
> To:   'emc-p...@majordomo.ieee.org'
> Subject:  Required "number of pulses per minute" 
> 
>   Hello everyone,
>   
>   Maybe someone in the group knows the following information.
> 
>   IEC 1000-4-5 (and the European Norm EN 61000-4-5) prescribes
> tests for simulating the effects of voltage surges caused by switching
> disturbances in the power station. I am trying to identify the "number
> of pulses per minute" when applying test surges to industrial
> equipment." My searching has resulted in the following answers:
> 
> 1."at least one per minute"
> 2."6 pulses per minute"
> 3."10 pulses per minute"
> 4."12 pulses per minute"
> 
> I have also been told that there is a new edition of EN 500082-2 (issued
> 1997) that might provide this information.  However, the usual
> documentation sources only have the 1995 edition of this standard.
> 
> My two questions are:
> 
> 1.Where can I find the "number of pulses per minute" defined for
> industrial equipment when applying IEC 1000-4-5 or EN 61000-4-5 ?
> Or does anyone know this number?
> 
> 2.Does anyone have a 1997 edition of EN 500082-2 ?  If you do,
> where were you able to purchase it??
> 
>   Thanks to anyone that can offer their input. 
> 
> John F. Dudek
> Manager, Product Safety Engineering
> Corcom Inc.
> Libertyville, Ill. USA
> voice:847-680-7400, ext. 134
> fax:  847-680-8169 (general) or 847-680-0340 (direct)
> Mailto:jo...@cor.com
> Visit us at http://www.cor.com

CE Technical Documentation

[Peter E. Perkins]

Well, Heber, I'll try to stop laughing long enough to give my
interpretation to all of this mess...  

The basic problem is that all of the EU output specifying what is
desired to support the CE marking is coming out of various groups and
committees and there is no clearinghouse for terms used in the Directives,
Standards, explanatory guides, etc...  so every man does what is right in
his own eyes (to quote an old saying)...  (hmmm, maybe they need a standard
to cover this)

So, Heber, take the broad view... they each mean the same thing
unless the writer gives the term a specific meaning within the document you
are reading at the time...  

As an aside, the term dossier is the French term for file or
record...

Now, go organize your CE Technical Construction Documentation
Dossier File Record.

- - - - -

Peter E Perkins
Principal Product Safety Consultant
Tigard, ORe  97281-3427

+1/503/452-1201 phone/fax

p.perk...@ieee.org  email

visit our website:

http://ourworld.compuserve.com/homepages/peperkins

- - - - -

PD article abstract...

[Peter E. Perkins]

PSNet

Aging Diagnosis of Insulation Systems by PD Measurements;
extraction of Partial Discharge Features in Electrical Treeing by R Bozzo,
C Gemme, F Guastavino - UofGenoa, M Cacciari - UofParma, A Contin -
UofTrieste, G C Montanari - UofBologna, Italy

Abstract:
The charge height of values associated with PD measured during
electrical tree inception and growth are processed according to the Weibull
distribution.   Test arrangements, based on the needle-plane electrode
system, consider specimens having either a cavity at the tip or an intimate
contact with insulation.  It is shown that the Weibull-function parameters
have close relation to discharges occurring in cavity and tree channels,
and that an indication of inception of electrical trees can be obtained.  

IEEE Transactions on Dielectrics and Electrical Insulation, Vol 5,
No 1, Feb 98


- - - - -

Peter E Perkins
Principal Product Safety Consultant
Tigard, ORe  97281-3427

+1/503/452-1201 phone/fax

p.perk...@ieee.org  email

visit our website:

http://ourworld.compuserve.com/homepages/peperkins

- - - - -

IEC 950 and amendments

[Peter E. Perkins]

The IEC process for amending standards is to change various
specific clauses in the standard as the standards committee deems
appropriate.  To have the latest version of IEC 950 you must buy all of the
amendments (including the latest - amendment 4) and carefully file each
modified page in your standard, starting with the oldest (no 1) and working
up to the latest (no 4).  In the future your job will be made easier as the
IEC is only going to allow 2 amendments to a standard before it must be
republished - it will also make it more expensive for you since you will
have to buy the entire standard again.  

- - - - -

Peter E Perkins
Principal Product Safety Consultant
Tigard, ORe  97281-3427

+1/503/452-1201 phone/fax

p.perk...@ieee.org  email

visit our website:

http://ourworld.compuserve.com/homepages/peperkins

- - - - -

Paper insulation abstract...

[Peter E. Perkins]

PSNet

Effects of Frequency, Temperature, Compression, and Air Pressure on
the Dielectric Properties of a Multilayer Stack of Dry Kraft Paper by V T
Morgan, CSIRO Telecom & Industrial Physics, Australia

Abstract
Kraft paper is used extensively in the electricity supply industry
for the insulation of HV apparatus, such as transformers, capacitors and
cables.  Because of the fibrous nature of the paper, many layers are
stacked or rolled to obtain the required electric strength.  The insulation
is thus a combination of cellulose and an impregnating fluid, which may be
a liquid, a gas or vacuum.  The dielectric properties of such a system
depend on the dryness, temperature, frequency and the degree of mechanical
compression.  Although the effects of moisture, temperature and frequency
on the dielectric properties of kraft paper have been studied, very little
work has been done on the effect of compressive stress, particularly
long-term effects.  Results are presented of measurements, in the frequence
range 50 Hz to 20kHz, of the effects of compressive stress and temperature
on the real and imaginary parts of the complex relative permittivity of a
multi-layer stack  of dry kraft paper under vacuum.  The variations of the
dc resistance with compressive stress and temperature also are reported. 
Results are given of the variation of the dielectric properties of a stack
of paper following a step change in either the temperature or the air
pressure.  The long-term variations are attributed to the slow diffusion of
ions through the stack, particularly those held at the interfaces between
layers.  

IEEE Transactions on Dielectrics and Electrical Insulation, Vol 5,
No 1, Feb 98.


- - - - -

Peter E Perkins
Principal Product Safety Consultant
Tigard, ORe  97281-3427

+1/503/452-1201 phone/fax

p.perk...@ieee.org  email

visit our website:

http://ourworld.compuserve.com/homepages/peperkins

- - - - -

Copy of: CE Technical Documentation

[Chris Dupres]

-- Forwarded Message --

From:   Chris Dupres, 100014,3703
TO: "Farnsworth, Heber", INTERNET:hfarn...@physio-control.com
DATE:   24/03/98 22:24

RE: Copy of: CE Technical Documentation

Hi Heber.

You wrote:


In the UK Electromagnetic Compatibility Regulations  SI 2372/1992, the only
term that is specifically mentioned is the title of Section V, the
Technical Construction File.  The content and structure of this document is
described in the Act, and this is the document which is used to provide
evidence of compliance under the 'Technical Construction File Route'.

Any other sets of technical documentation used to support claims of
compliance under the 'Standards Route' should be labelled 'Technical Files'
or 'Design Files' etc.

Hope that helps,

Chris Dupres
Surrey, UK.

Required "number of pulses per minute"

[Dudek, John]

Hello everyone,

Maybe someone in the group knows the following information.

IEC 1000-4-5 (and the European Norm EN 61000-4-5) prescribes
tests for simulating the effects of voltage surges caused by switching
disturbances in the power station. I am trying to identify the "number
of pulses per minute" when applying test surges to industrial
equipment." My searching has resulted in the following answers:

1.  "at least one per minute"
2.  "6 pulses per minute"
3.  "10 pulses per minute"
4.  "12 pulses per minute"

I have also been told that there is a new edition of EN 500082-2 (issued
1997) that might provide this information.  However, the usual
documentation sources only have the 1995 edition of this standard.

My two questions are:

1.  Where can I find the "number of pulses per minute" defined for
industrial equipment when applying IEC 1000-4-5 or EN 61000-4-5 ?
Or does anyone know this number?

2.  Does anyone have a 1997 edition of EN 500082-2 ?  If you do,
where were you able to purchase it??

Thanks to anyone that can offer their input. 

John F. Dudek
Manager, Product Safety Engineering
Corcom Inc.
Libertyville, Ill. USA
voice:  847-680-7400, ext. 134
fax:847-680-8169 (general) or 847-680-0340 (direct)
Mailto:jo...@cor.com
Visit us at http://www.cor.com