Re: [PSES] Basic Schematic Creation Software

2021-05-21 Thread Brian Kunde 
Thanks. I'll check them out.  If I find one that does what I want I'll let
everyone know.
The Other Brian

On Thu, May 20, 2021 at 2:05 PM Brent DeWitt  wrote:

> Manny brings up a great option.  Even if you have no need for actual
> circuit simulation.  I can recommend SiMterix, LTSpice and MicroSim as
> totally free programs that will allow you to create schematics, however,
> I'm not so sure that any of those offer open/closed switch symbols.
>
> From a purely graphic approach,"DIA" is a free alternative to Visio and
> allows structured drawings with some pre-defined electrical elements:
>
>
>
> Fare well,
> Brent DeWitt, AB1LF
>
> On 5/20/2021 1:42 PM, Manny Barron wrote:
>
> Hi Brian,
>
> I have found Spice to be useful for scenarios as you describe, in my case
> for EMC/EMI analysis. The program is relatively easy to use and changing
> circuit elements and re-running an analysis is simple in my opinion.
>
> There are several variations of Spice on the market today, but I'm not
> sure if you'll find a free version. Ten years ago I purchased T-Spice (I
> think that's the name) for about $500 and 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 Thu, May 20, 2021 at 8:53 AM Brian Kunde  wrote:
>
>>
>> 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 the state of a switch or relay to represent different states of a
>> Safety Function.  And then save it off in .pdf format.
>>
>> Does anyone know of some software that will do this for a low cost or
>> maybe Free?  This is something we will use only a few times a year.
>>
>> Thanks to all in advance for any information.
>>
>> Regards,
>> The Other Brian
>>
>>
>> -
>> 
>>
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> -
> 
>
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> -
> 
>
> This message is from the IEEE Product Safety Engineering Society emc-pstc
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> emc-p...@ieee.org>
>
> All emc-pstc postings are archived and searchable on the web at:
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>
> Attachments are not permitted but the IEEE PSES Online Communities site at
> http://product-compliance.oc.ieee.org/ can be used for graphics (in
> well-used formats), large files, etc.
>
> Website: http://www.ieee-pses.org/
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Re: [PSES] Ganged Conductors in Machinery

2021-05-21 Thread Richard Nute 
 

 

Hi Mark:

 

Here’s a start:

 

https://www.ecmag.com/section/codes-standards/conductors-connected-parallel-
each-set-must-have-same-electrical

 

https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Cou
rses/NEC-Content.php?sectionID=297.0

 

https://www.ecmag.com/section/codes-standards/derating-parallel-conductors

 

https://iaeimagazine.org/features/parallel-conductors-revisited/

 

Stay safe, and best regards,

Rich

 

 

 

 

 

 

From: Stultz, Mark <0f79f2e10e47-dmarc-requ...@listserv.ieee.org> 
Sent: Wednesday, May 19, 2021 9:05 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Ganged Conductors in Machinery

 

Hello all,

 

Is it permissible to combined separate conductors to carry a load in
parallel within machinery?  If it is allowable, what derating would be
required?  I can’t find reference to this in IEC 60204-1 or NFPA 79.

 

Many thanks,

 


 

 


Mark Stultz

10175 Philipp Parkway


Senior Mechanical Development Engineer

Streetsboro, OH 44241


CMSE® – Certified Machinery Safety Expert (TÜV NORD)

330-342-2402


Automated Packaging Systems

 


 

 




 

 


  autobag.com

  SealedAir.com

 

 

 


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[PSES] UL Rain Test Nozzle

2021-05-21 Thread Douglas E Powell 
All,

Has anyone ever taken time to find the coefficient of discharge for the UL
rain test nozzle (
https://www.shopulstandards.com/ProductDetail.aspx?UniqueKey=27488)?

The Type 3R test I'm doing requires 5 PSI of water pressure on a
straight pipe. Using the Pitot Gauge equation, it seems to me I should be
able to figure out how much water is being used every hour.  I suppose I
could simply spray into a bucket to learn the flow rate in GPM or LPM, but
my nozzles are still on order and have not arrived yet.

Thanks,  Doug
--

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01

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