nt:* Tuesday, May 14, 2024 11:41 AM
>> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
>> *Subject:* Re: [PSES] SCCR Rating Question
>>
>>
>>
>> Could this number to used to select a suitable circuit breaker and so the
>> interrupting voltage is an important parameter?
>>
&
Greetings to all.
I am new to SCCR ratings on industrial machinery. The ratings I have seen
sometimes has a "Maximum Voltage" included, such as;
SCCR: 22kA, 600V Maximum
Where does the voltage value come from? In one case, the machine had a
line voltage rating of "120/208 Vac", but the SCCR
Greetings to all.
We are working on a motor driven machine that would be used in a
commercial, industrial, and light industrial environment.
The machine has a Green button to Start, and a Red button to Stop. These
buttons are illuminated. Other than the e-stop, these are the only
operator
I am working on an Industrial Machine with a 3-phase 5hp motor driven by a
VFD. To pass the EMC conducted emissions requirements, we had to add a RF
Line Filter that is recommended by the VFD manufacturer. This filter has
large Y-Caps. I know these currents theoretically cancel out in a balanced
I appreciate the replies on this topic.
My original question had less to do with how speed of motion affects the
injury and more to do with how speed affects the User/Operators ability to
Avoid the hazard in the first place. The IEC 61010-1 standard mentions how
velocity factors into the Risk
Greetings All.
The IEC/EN 61010-1 table 12, Risk assessment of mechanical hazards to body
parts, states that a hazard can be avoidable if the speed of the motion was
reduced. Reduced to what speed?
It says, "The motion is visible and velocity is low enough for body parts
to be removed without
The standard I have says this in section 8.3.2:
*"In the case of painted surfaces covering a conducting substrate, the
following procedure shall be adopted: *
*If the coating is not declared to be an insulating coating by the
equipment manufacturer, then the pointed tip of the generator shall
I have a non-electrical benchtop product that holds a piece of sandpaper
while slowly running water over the sandpaper. The only connection to this
product is a water supply at normal water supply pressure. The User holds
the item they want to sand in their hand and rubs it back and forth on the
The exposure limits according to the ICNIRP depends on frequency, of course.
>From 1hz to 300hz the Occupational limits are like 20kV/m for E-Field and
40k to 200uT.
>From 3khz to 10Mhz the limit is 170V/m (100uT). For the General Public (up
to 24 hours a day), the limit is 83V/m (27uT).
For
Who is planning to attend this event?
I will be there on Tuesday wandering around the vendor booths (autographs
are free☺ hee-hee). Look for me and say "Howdy!!". I will have my "The
Other Brian" name tag on. It would be nice to put a face with the names.
I know many of you will be
Greetings Everyone.
To validate a Surge Immunity Generator and CDN, the IEC 61000-4-5 standard
refers to a "Current Probe" for measuring the Short-Circuit Current. I
wish to buy one.
Can anyone recommend a model and supplier/manufacturer of a current probe
that they like and will do a good job
If I may pile on late, keep in mind that measurement uncertainty is Plus or
Minus (±). Years ago when I was with a previous company, we had a buy/sell
piece of junk product that we were selling with our company's brand/name on
it. It was audited in Sweden as part of their surveillance program and
Is there a good source of information on the application of this new
directive? Are there any good articles or summaries comparing the new
directive to the old? Are there implementation dates? Can we
declare compliance to the new directive now, or are their other hurdles
that need to be put into
I have been given two samples of metal plates; one plated in our current
material and the other with a new plating material we want to switch to in
production. I have been tasked to compare the electrical surface
conductivity.
What is the best way to do this? How is this done in the industry?
We use X2 caps in RF filters prior to the Diode Bridge. Do filter caps
after the Diode Bridge (DC), but before the isolation transformer, have to
be X2? How about filter caps to Chassis/PE after the Bridge? Do they have
to be Y-caps?
Thanks,
The Other Brian
PS: We typically buy power
I have a piece of Electronic Equipment (laboratory equipment declared under
the Machinery Directive) being held up in Egypt Customs. They say they
accept the CE marking and EU-DoC but the DoC has to be signed by some
authority other than the Manufacturer. What does that mean?
Does anyone know
The simple answer is that you need to provide creepage and clearance
distances in secondary circuits to avoid arcing when the circuit is
subjected to the absolute worst case surges and transients that the circuit
might see. Since this can be difficult to determine, most people just use
the tables
> to lighting strikes, but there are others on this forum who know this
> better than I.
>
> Mike Sherman
> Sherman PSC LLC
>
> On 11/02/2022 1:59 PM Brian Kunde wrote:
>
>
> Very good information, all.
>
> So how do I know if my product is "*effectively protected f
> Machinery*, NFPA 79?
>
>
>
> -Doug
>
>
>
> Douglas E Powell
>
> Laporte, Colorado USA
>
> doug...@gmail.com
>
> LinkedIn
> <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Fcoloradocomplianceguy%2F=05%7C01%7Cdonal
ell
> Laporte, Colorado USA
> doug...@gmail.com
> LinkedIn <https://www.linkedin.com/in/coloradocomplianceguy/>
>
> (UTC -06:00) Mountain Time (US-MDT)
>
>
>
> On Tue, Nov 1, 2022 at 11:55 AM Brian Kunde wrote:
>
>> It just came to my attention that section 670
It just came to my attention that section 670.6 of the US National Electric
Code 2017 requires a listed Surge Protection Device (SPD) to be on any
Industrial Machine that has an Interlock, or I assume any kind of safety
function. Is this true? The only information I can find on the internet is
I see the new IEC 62368-1 standard is described as a HBSE standard. In
your own words, in just a few sentences, and maybe with an example or two,
can you explain how this HBSE standard differs from a non-HBSE standard?
How does this change the way a conformity assessment is performed and
Another way to go is to buy a Capacitor Discharge Tester that is made to
perform the test you want. Just plug it in and press a couple buttons.
There may be more on the market but the only one I know of is made by
Compliance West USA, model CDT-240. We have the 15 amp version. The nice
thing
hat it must be safe because it wasn't on our misuse
> list. We emphasized how to use our equipment correctly, and what the scope
> of its applications were.
>
>
>
> However, we would clearly identify in some warnings what not to do where
> we perceived that to be a foreseeable
My company manufactures Laboratory Equipment such as analyzers and
determinators. They are highly specialized equipment, yet have an infinite
range of uses.
Even though all known residual risks are documented in the Safety Warning
section of the manual, they will commonly request a list of
ng
> conductor.
>
> Best regards,
>
> Rich
>
>
>
>
>
> *From:* Lfresearch Jose <00734758d943-dmarc-requ...@listserv.ieee.org>
> <00734758d943-dmarc-requ...@listserv.ieee.org>
> *Sent:* Wednesday, August 24, 2022 1:44 PM
> *To:* EMC-PSTC@
-requ...@listserv.ieee.org>
> *Sent:* Wednesday, August 24, 2022 1:44 PM
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* Re: [PSES] High Touch Current and GFCIs
>
>
>
> I have wondered about something similar.
>
>
>
> If I use a 6 way power strip, I’m assuming all the leakage c
If I have a rake of electrical equipment with a single power cord and a
combined touch current exceeding 6mA, and I plug the rake into a circuit
with a GFCI, will it trip?
Thanks.
The Other Brian
-
This message is from the IEEE
This topic goes a little deeper, I think. Question being, how are the
harmonized standards to be listed on your DoC?
It appears to me that the Commission lists standards a couple different
ways, which adds to the confusion. For example, on the EMCD Harmonized
Standards list, it shows it one way
I lost all my emails from before on Leakage Current/Touch Current, but your
replies were very helpful. Thanks.
I am trying to understand what affects the result of the Touch Current test
according to IEC 60990. In our example, we are testing 230V single phase
products with a grounded PE third pin
Greetings.
Would a stand-alone industrial cut-off saw (stationary grinding machine),
5hp to 30hp, intended to cut through metal material, 3-phase 380V, about
the size of a large refrigerator and weighing about 400kg (880 lbs) or
more, be exempt from RoHS?
Wading through all the RoHS documents
This has always confused me. Consider the EUT as ITE or Laboratory
Equipment (61010-1).
I can see where the PE conductor is opened and you place the Human Body
Impedance Circuit (Measuring Device or MD) between the accessible metal
chassis of the EUT and PE to measure the leakage current that a
as 3 phase induction motors. Energy efficiency compliance generally cannot
> be judged at the incorporated level.
>
>
>
> Best Regards,
>
> -Lauren
>
>
>
> *From:* Brian Kunde
> *Sent:* Thursday, June 30, 2022 2:01 PM
> *To:* EMC-PSTC@LISTSERV.IEE
I am confused and frustrated. We have an industrial product that includes
a small water recirculation tank which includes a motor/pump assembly that
is powered by 230V/360V/460Vac 3-phase. Our NRTL inspectors says this pump
assembly must have UL, CSA, or equivalent. Here is a website that shows
Greetings to All!!
I have an industrial machine with blades that has to be changed out by the
User/Operator. The blade is behind a door with a positive mechanical
action switch that when opened puts the motor's VFD into a Safe Stop
Function Mode (this is a certified Safety Function). In
This has always been confusing because they choose poor words and
terminology and then keep changing the meaning which only makes it more
confusing.
It shouldn't matter who manufacturers the product, ships it, imports it,
sells it, stocks it, markets it, or repairs it. What is important is to
If interested, please inquire through the following website:
https://workforcenow.adp.com/mascsr/default/mdf/recruitment/recruitment.html?cid=263cbf9c-eec3-4f43-a005-51e8815d8a23
Hiring or promoting to a Product Safety Engineer position is possible to
the right person with the right
I do not know where the information I have originally came from, but I got
this and have been using this for over 30 years:
FF = Very Fast Acting
F = Fast Acting (Common)
M = Medium Time Lag
T = Time Lag (Common)
TT = Long Time Lag
I got this from Bud Lang who was our Safety Guru at Heath Kit
I know nothing about the regulatory requirements of an RFID Reader but I
assume it has a transceiver so it is considered an Intentional Radiator.
If I buy a reader over-the-counter in one country, can I use it in another
country? Or, like WiFi and Bluetooth, do I have to have a Reader that is
An IP code of IPx2 implies the enclosure protects against the ingress of
water drops at 15° tilt. Now, most PC enclosures protect the electronics
from occasional exposure to water drops, but it is not designed to be
exposed to water drops continuously. So can you rate an electronic device
IP22,
This begs the question, what is the difference between the BS version and
the EN version? Is it likely that a product that meets the requirements of
the EN version won't meet the requirements of the BS version? I think
the risk of that would be quite low. Would putting the BS version on your
las E Powell
> Laporte, Colorado USA
> doug...@gmail.com
> http://www.linkedin.com/in/dougp01
>
>
> On Mon, Jun 28, 2021 at 11:28 AM Brian Kunde wrote:
>
>> Doug,
>>
>> This is a huge accomplishment and you and your entire design team should
>> be very proud.
Doug,
This is a huge accomplishment and you and your entire design team should be
very proud. A celebration of some kind would be expected. For companies
like ours who have been making the same type of products for many years, we
usually pass safety inspections in the first pass because we know
https://www.linkedin.com/pulse/ship-repair-man-story-why-experts-get-paid-more-faiz-noor/
A giant ship engine failed. The ship’s owners tried one expert after
another, but none of them could figure but how to fix the engine.
Then they brought in an old man who had been fixing ships since he was
IEC/EN/UL 61010-1 standard in section 17 states that if there is a hazard
not addressed by the standard that you must perform a risk assessment. In
a note, it lists some Risk Assessment standards, but the most used and
current standard is the ISO 12100 which calls out many other standards
Usually, high-temperature surface warning symbols are only required if the
hazard is not obvious. So in ovens, stovetops, griddles, toasters,
heat-sinks, etc. do not require them.
However, if such appliances or device have areas that are hot but it is not
obvious it is hot, a warning symbol
software until Brent mentioned it. While
> looking through the developers site, I saw there are additional symbol
> packs already designed that may meet your needs:
> http://dia-installer.de/shapes/index.html.en
>
> Regards,
> Patrick Lawler
>
> On Thu, May 20, 2021 at 8:53 AM
I also concur with what has been posted by others. But I would like to
inject one short commentary if I might.
Traditionally, we have found that a large percentage of emissions failures
are due to the over-the-counter peripherals and/or cables; a required part
of the overall test system but
nd it worked great for current
> in-rush analysis I had to do.
>
> Recommend doing some web searches on Spice to see what turns up, maybe
> you'll find what you're looking for, and who knows, maybe even freeware.
>
> Regards,
>
> Manny Barron
>
>
>
>
> On
I am in need of a simple program for creating simple schematics of Safety
Circuits in a variety of States. I envision something that I can easily
insert door switches, relays, button switches, e-stops, fuses, circuit
breakers, etc.. It would be nice if once laid out, I can simply click to
change
>
>
>
> I agree with Brian. I’ve been involved with product safety over 20 yrs and
> worked for an NRTL for about 6 of those.
>
>
>
> The 40 A requirement came from the Canadian electrical code and all the
> NRTLs.
>
>
>
> The only exemptions I’ve seen to the 100
61010-1 § 4.1 says, "Tests in this standard are TYPE TESTS to be carried
out on samples of equipment or parts. Their only purpose is to check that
the design and construction ensure conformity with this standard. In
addition, *manufacturers shall perform the ROUTINE TESTS of Annex F on 100
% of
I have a few questions regarding UKCA.
1. Machinery Regulation 2008-1597 pretty much says the same thing and the
EU Machinery Directive. Section 1.7.4.2c) requires the DoC to be included
in the Manual (Instructions), OR "a document setting out the contents of
the EC declaration of conformity,
I am working on the first Industrial Machine of my career so I could use
some advice and clarification regarding the requirements for FCC emissions.
I have been told by many that in North America, Industrial Equipment does
not have to be tested, verified, or anything for FCC by the manufacturer
ham*
>
> *Sulis Consultants Ltd*
>
> *Tel: +44 (0)7946 624317*
>
> *Web: https://sulisconsultants.com/ <https://sulisconsultants.com/> *
>
> Registered in England and Wales, number 05466247
>
>
>
> *From:* Brian Kunde
> *Sent:* 22 November 2020 05:26
>
Because we provide DoCs translated into over 30 languages, we try to avoid
text that has to be translated. Our type of products do not have to comply
with these new regulations until next year, but when we do, we plan to use
the same nomenclature that is used for the amendments of Standards by
Greetings to all. I hope this finds you well.
Once again the subject of SCCR has come up. I have struggled for years to
find a document or someone who can explain this to me. The bottom line is
I need to know how I would determine the SCCR for my product. In one case
in particular I am
When do you know if a product needs to be tested to these standards or
not? What requires this testing? Is there a criteria that can be used?
Does the SCOPE of these standards make it clear if and when the standards
need to be applied to a product? We have had customers request it
but most
on line, I think. I had this discussion
> with UL as to why Ukraine, and the EAC, would not accept the CB Scheme
> report, which is why the client went that route, but the answer was that it
> still needed to go through an EAC 3rd party before they would issue a
> mark. And that incl
t the CB Scheme
> report, which is why the client went that route, but the answer was that it
> still needed to go through an EAC 3rd party before they would issue a
> mark. And that included a physical product review and factory inspection.
> The unanswered question then was what does
Greetings All.
All of a sudden we are having trouble with Ukraine. Before we even ship
our product to the customer, we are being contacted by unknown companies
who claim to be responsible to overlook the installation and perform
"complex protocols" on our product. They are asking for EMC and
Even though our products do not have intentional radiators, on occasion,
one of our customers will ask us to provide data so they can do a Risk
Assessment to the ICNIRP guidelines and/or EU Directive 2013/35/EU. The
ICNIRP just released two new guidelines; one that covers up to 100khz and
the
ks.
The Other Brian
On Fri, May 22, 2020 at 12:54 PM Brian Kunde wrote:
> Did you get the replies you wanted? Have you ever looked at the standard
> EN IEC 61293:2020? This new version just came out. This new version is
> loaded with typos and to many I think they are going to find it
If any of you have a Case of Corrona, I hope it is the type that comes in
bottles or cans.
First, there is a guy in this group who I chatted with in the past who is
like an expert in the E-Stop function. He has a Blog or Website dedicated
to this topic which I cannot currently find. Can anyone
Not all companies manufacturers high volume consumer goods. Our company
designs and builds analytical test equipment (laboratory equipment) which
is very expensive (relatively speaking) and built one at a time per our
customer requirements. We have about 50 Families of products; each with
dozens
When we develop a new test report in the CB Format for a test standard, we
usually summarize with test requirements for each clause to reduce the size
of the overall report.
Can the Test Report be a Word-for-Word copy of the test standard, so does
it have to be different to avoid copyright
Greetings.
I know this email is similar to Ragan's recent email, but I just had a
similar encounter. I could really use your help and wisdom.
Our company self declares to the CE requirements in Europe. We also sell
products in the United States without NRLT certification but will obtain an
NRLT
The actual requirement is "2) The ENCLOSURE, and any baffle or flame
barrier, shall be made of metal (except magnesium)
or of non-metallic materials having a flammability classification of *V-1
or better*, of IEC 60695-
11-10."
Keep in mind the "or better". Most enclosures I have ever seen are
I'm not a Marketing person, so I do not know the official term for it, but
there is a method of doing business where one company buy/sells a product
made by another company marked with the brand name and trademark of the
marketing company. I've always called this "Branding", but like I said it
If I have an electronic product that I want to place on the market in
Europe, and the product is made up of several individual electronic devices
each powered by AC mains (packaged and sold together), do I place the CE
marking on only one of the devices or all devices?
And if the answer is "all
Reference IEC/EN 61000-3-3:2013 section 6.5 regarding Observation Period.
The Electrical Equipment (EE) under test is NOT listed in Annex A.
We are trying to make sure we are testing a product correctly. Your help
would be greatly appreciated.
The EE has a cycle time of about 15 to 20 minutes.
ing I just wrote is
> wrong.
>
>
>
> Ted Eckert
>
> Microsoft
>
> The opinions expressed are my own and do not necessarily reflect those of
> my employer.
>
>
>
> *From:* Brian Kunde
> *Sent:* Friday, June 7, 2019 6:10 AM
> *To:* EMC-PSTC@LISTSERV.IEEE.
My question(s) is about stacking ground lugs on a single stud for the
Protective Earth Terminal inside of a piece of electrical equipment (IT or
Lab Equipment).
Where is it documented how to properly stack ground lungs?
I have seen this done several ways:
1. A welded stud or just a bolt (#6 or
s acceptable is a matter for national legislation, so
> there are probably several incompatible answers.
>
> Best wishes
> John Woodgate OOO-Own Opinions Only
> J M Woodgate and Associates www.woodjohn.uk
> Rayleigh, Essex UK
>
> On 2019-04-24 17:43, Brian Kunde wrote:
>
&
I am constantly being asked three questions about E-Stops which I cannot
find the answers to.
1. "Mushroom Shape" is specifically called out in some standards but the
newer style e-stop switches are becoming less and less Mushroom Shaped. If
this a concern?
2. "Yellow Background" is getting
> attachments unless you trust the sender and know the content is safe.
>
>
>
>
>
> I received the same systematic notification last night as everyone else
> and have not done anything with it. I am receiving email today but I don’t
> think my post from earlier this morning w
The companies I have worked for over the last 40 years have relied heavily
on international sales, so having your company's name and address on the
product is just part of doing business. I'm not sure what the argument is
with having your address on the product. My questions to those who
We received a strange request today from Hong Kong
supposedly initiated from Customs.
We were asked to provide CCC supporting documents for about a dozen cooling
fans used in some of our instruments (laboratory equipment). I knew CCC is
required on household electrical fans but not small
RE: Mains Color CodesRobert,
The only sections I could find in the NEC allowing light blue wire for
neutral was in Chapter 4 Equipment for General Use, article 400 Flexible
Cords and Cables. This would apply to flexible power cords for computers
and such. I'm not sure what your product is or if
ACA contact..George,
Goto the following web page:
http://www.aca.gov.au/standards/emc.htm
The bottom of that web page has phone, fax and email addresses. I have
contacted them by email in the past and they are very quick to respond as
well as being very helpful.
Brian Kunde
-Original
to safely
lift. That's basically it.
I'm sorry I could not give you exactly what you asked for. I asked the same
question last year and spent weeks pouring through factory worker standards
that didn't apply to products. I hope this helps.
Brian Kunde
-Original Message-
From: owner-emc-p
Hi Barry,
I commend you on the in-dept study you do when looking at standards, but as
Abraham Lincoln said, If you look for the bad ... you will surely find it.
Standards are written for the majority of products, not for every product in
every environment. That's why there is the TCF rout to
.
Brian Kunde
LECO Corp.
-Original Message-
From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf
Of Russell, Ray
Sent: Friday, March 24, 2000 10:14 AM
To: 'IEEE PSTC'
Subject: EMC - Declaration of Incorporation?
Greetings,
We sell an air compressor with a DC motor
Hello group,
I apologize for this question but I'm in a pickle and looking for help and
advise.
We make and sell a Cut-off Saw that is used to cut steal rods. We sold a unit
to a customer in the United States. The unit was shipped with the motor wired
for 220VAC. The customer wants it
of equipment, whether a computer, a lift truck, or digital scope
unless we can obtain the schematics, drawings, and service documentation. I
think in this industry it is for the most part a requirement of doing
business.
Brian Kunde
- Original Message -
From: Brian Harlowe bharl
seem right to
try and measure a complex circuit while powered off with a conventional
capacitance meter. How else can this be done?
Any help would be appreciated.
Brian Kunde
MORE INFORMATION
I have an instrument that places 2500 volts in an area that the operator has to
have access to. We
the contract simply by firing the person who
signed it. Right? It is the same concept.
Brian Kunde
- Original Message -
From: Tony Reynolds reyno...@pb.com
To: emc-p...@ieee.org
Sent: Thursday, November 11, 1999 10:15 AM
Subject: D of C - Who Signs?
Hello!
Forgive me
or email me anything you can.
Thanks,
Brian Kunde
brian_ku...@leco.com
attenuation through it. Any recommendations or alternate solutions
will be most appreciated.
Please email me at:
brian_ku...@leco.com
Thanks
Brian Kunde
Compliance Testing Center
Leco Corp.
replies.
Brian Kunde
LECO Corporation
Compliance Testing Center
. Does anyone know a
company that still makes these things? How about the raw material (I
can make them myself)?
Thanks in advance,
Brian Kunde
bku...@qtm.net
LECO Corp.
generator, an AR field probe/monitor,
and an HP power meter.
Would appreciate any and all recommendations on software you have seen
or used, good or bad.
Brian Kunde
LECO Corp.
. Maybe others could comment on their
experience
with using the CB scheme.
Brian Kunde
LECO Corp.
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