Re: [RE-wrenches] Fire fighters

[Starlight via RE-wrenches]

To all techies, what if a bleeder resister, similar to what is used on a 
capacitor, was in parallel with the PV strings or array? That should pull down 
any high voltage from a low illuminance light source. 

Larry Crutcher
Starlight Solar Power Systems


On Mar 8, 2023, at 2:13 PM, Darryl Thayer via RE-wrenches 
 wrote:

Hello the answer is yes.  On a job  several years ago to finish I worked after 
dark.  It was a full moon, and a street light was nearby I got bit from a 500 
Voc module string.  I am sure I did not have 500 V but it only takes 20 ma. To 
be deadly. I did not get my volt ohm meter out but I should have.

On Wed, Mar 8, 2023, 9:34 AM Kristopher Schmid via RE-wrenches 
mailto:re-wrenches@lists.re-wrenches.org>> 
wrote:
Hi wrenches,

In speaking to local firefighters last year, I had a question that stumped me.  
At night, will the light from the flames or the fire fighters' flood lights 
energize the array to a dangerous potential?

Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com 
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE
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Re: [RE-wrenches] Fire fighters

[Darryl Thayer via RE-wrenches]

Hello the answer is yes.  On a job  several years ago to finish I worked
after dark.  It was a full moon, and a street light was nearby I got bit
from a 500 Voc module string.  I am sure I did not have 500 V but it only
takes 20 ma. To be deadly. I did not get my volt ohm meter out but I should
have.

On Wed, Mar 8, 2023, 9:34 AM Kristopher Schmid via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hi wrenches,
>
> In speaking to local firefighters last year, I had a question that stumped
> me.  At night, will the light from the flames or the fire fighters' flood
> lights energize the array to a dangerous potential?
>
> Any light you can shed (pun intended) would be most welcome.
>
> Shine On!
>
> Kris Schmid
> Legacy Solar, LLC
> 137 West 1st Avenue
> Luck, WI 54853
> www.legacysolar.com
> 715-653-4295
> NABCEP Certified PV Installation Professional
> Licensed Wisconsin Master Electrician
> BSEE
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Re: [RE-wrenches] Fire fighters

[bob--- via RE-wrenches]

Well, turns out there might actually be something to bright scene 
lighting enabling some power

output during a fire at night.

Here is one paper from San Francisco.

http://ufsw.org/pdfs/photovoltaic_systems.pdf

However, firefighters have particular safeguards they should follow day 
or night.


The present day lighting may not have enough light energy to be a 
problem but that doesn't matter.
Still have to play it safe.   I have not seen any facts and figures but 
I may just have some firefighter
friends let me take a PV module and illuminate it to test there when I 
get back up north.

I think it would be a good experiment at least.

boB

boB

On 3/8/2023 10:43 AM, b...@midnitesolar.com wrote:


I believe that kind of  illumination  could certainly put out some voltage
but wouldn't have much, if any, current or power behind it.  But could 
shock someone.


Any dangerous energy would have to come from a capacitor being charged 
up that SHOULD be disconnected
through the rapid shutdown system at that point.  And it would have to 
have the light shining on it for quite

a while to rack up any watt-hours.

boB
On 3/8/2023 10:32 AM, Christopher Warfel via RE-wrenches wrote:


They can generate enough illumination to have the module(s) reach ~ Voc.

On 3/8/2023 10:31 AM, Kristopher Schmid via RE-wrenches wrote:

Hi wrenches,

In speaking to local firefighters last year, I had a question that 
stumped me.  At night, will the light from the flames or the fire 
fighters' flood lights energize the array to a dangerous potential?


Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com 
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE

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--
                Christopher Warfel
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                    401-466-8978




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Re: [RE-wrenches] Fire fighters

[bob--- via RE-wrenches]

I believe that kind of  illumination  could certainly put out some voltage
but wouldn't have much, if any, current or power behind it.  But could 
shock someone.


Any dangerous energy would have to come from a capacitor being charged 
up that SHOULD be disconnected
through the rapid shutdown system at that point.  And it would have to 
have the light shining on it for quite

a while to rack up any watt-hours.

boB

On 3/8/2023 10:32 AM, Christopher Warfel via RE-wrenches wrote:


They can generate enough illumination to have the module(s) reach ~ Voc.

On 3/8/2023 10:31 AM, Kristopher Schmid via RE-wrenches wrote:

Hi wrenches,

In speaking to local firefighters last year, I had a question that 
stumped me.  At night, will the light from the flames or the fire 
fighters' flood lights energize the array to a dangerous potential?


Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com 
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE

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--
                Christopher Warfel
                 ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                401-466-8978




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Re: [RE-wrenches] Fire fighters

[Christopher Warfel via RE-wrenches]

They can generate enough illumination to have the module(s) reach ~ Voc.

On 3/8/2023 10:31 AM, Kristopher Schmid via RE-wrenches wrote:

Hi wrenches,

In speaking to local firefighters last year, I had a question that 
stumped me.  At night, will the light from the flames or the fire 
fighters' flood lights energize the array to a dangerous potential?


Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com 
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE

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--
            Christopher Warfel
                 ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                401-466-8978


BEGIN:VCARD
VERSION:4.0
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TEL;VALUE=TEXT:401-447-5773 (c)
NOTE:Use the cell phone number for all communications.  Thank you.
URL:https://www.entech-engineering.com
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Re: [RE-wrenches] PV and EMP

[Glenn Burt via RE-wrenches]

I would review Sol Arks website as they say they are immune. Probably have 
something to back that up published there.-GlennSent from my 'smart'phone, so 
please excuse typos and spelling errors.-- Original message--From: 
Marco Mangelsdorf via RE-wrenchesDate: Wed, Mar 8, 2023 11:37 AMTo: 
RE-wrenches;Cc: Marco Mangelsdorf;Subject:[RE-wrenches] PV and EMPAloha all, 
Have any of you come across any articles or white papers on how PV systems 
(including energy storage) fare under conditions of electromagnetic pulses and 
solar flares?Mahalo, marco
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[RE-wrenches] PV and EMP

[Marco Mangelsdorf via RE-wrenches]

Aloha all,

Have any of you come across any articles or white papers on how PV systems
(including energy storage) fare under conditions of electromagnetic pulses
and solar flares?

Mahalo,
marco
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Re: [RE-wrenches] Fire fighters

[Lloyd Hoffstatter via RE-wrenches]

Kris,
This UL testing report covers firefighting lighting on PV 
https://fsri.org/research-update/firefighter-safety-and-photovoltaic-systems-summary-released

Best regards,
Lloyd
Lloyd Hoffstatter
Sunstruck Consulting

Get Outlook for iOS

From: RE-wrenches  on behalf of 
Kristopher Schmid via RE-wrenches 
Sent: Wednesday, March 8, 2023 10:31:24 AM
To: RE-wrenches 
Cc: Kristopher Schmid 
Subject: [RE-wrenches] Fire fighters

Hi wrenches,

In speaking to local firefighters last year, I had a question that stumped me.  
At night, will the light from the flames or the fire fighters' flood lights 
energize the array to a dangerous potential?

Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE
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[RE-wrenches] Fire fighters

[Kristopher Schmid via RE-wrenches]

Hi wrenches,

In speaking to local firefighters last year, I had a question that stumped
me.  At night, will the light from the flames or the fire fighters' flood
lights energize the array to a dangerous potential?

Any light you can shed (pun intended) would be most welcome.

Shine On!

Kris Schmid
Legacy Solar, LLC
137 West 1st Avenue
Luck, WI 54853
www.legacysolar.com
715-653-4295
NABCEP Certified PV Installation Professional
Licensed Wisconsin Master Electrician
BSEE
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