[RE-wrenches] EMP - Faraday Cages

Sat Sep 9 16:22:02 PDT 2017

How about using a solid metal enclosure instead of a mesh? Would that
cover frequency differences?

One thing railroad tracks and telegraph wires have in common is that
they are very long metallic conductors. The charged particles cut
across the conductors for extended distances,  That situation would
be similar with a grid connected inverter. 

If the inverter were isolated from the grid, with the breakers turned
off (or removed), maybe that would help, depending on the magnitude of
the pulse. 

The electronics would  need to be isolated from the grounded,
conductive cover of the enclosure. The equipment should be isolated by
design with neutral and ground separate. 

Would a Midnite surge protector be of any help in an EMP event? 

Thanks,

Drake 

----- Original Message -----
From:
 "RE-wrenches" <re-wrenches at lists.re-wrenches.org>

To:
"RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Cc:

Sent:
Fri, 8 Sep 2017 14:56:37 -0400
Subject:
Re: [RE-wrenches] EMP - Faraday Cages

Spent a little time over the last few years trying to study this,
there is dozens of answers to the same question it seems if you
surround it with mesh it depends on the spaces size in the mesh and it
also depends on the frequency of the EMP

I would not bet that just putting a disconnect in the wires would help
but lightning is capable of jumping miles across the sky I can't
imagine that an emp would be any different I'm sure it could bridge a
gap the size of a breaker or disconnect relatively easily.

During the Carrington event in the 1800s it was setting railroad ties
on fire as well as burning down telegraph offices

I'm afraid the best bet would be a back up inverter and controller
properly wrapped and shielded and make the sign of the cross and pray
for the best !

And if it's atmospheric like a solar pulse or other challenge you
would want to wait several days before you brought out your back up
stuff because you may get hit again in a matter of hours or days and
it be a shame to get everything possibly working again and have it
wiped out by the 2nd hit

I'm probably already outside of what Michael would like me to be so we
can continue later if you like

Bob ellison

On Sep 8, 2017, at 12:22 PM, drake.chamberlin at redwoodalliance.org [1]
wrote:

In 2013 we were having a discussion of Faraday cages. I don't think we
ever got an answer to the question of whether a grounded inverter or
charge control enclosure would serve as a Faraday cage? If all
external lines were disconnected, would the grounded metal enclosure
prevent damage from an EMP?

Thanks,

Drake

	 Chris Daum

 [2]
 Tue, 07 May 2013 12:21:16 -0700 [3]

	Dear people:

 So I have a customer worried about the end of the world as we know
it. I've

 looked at the HP archives and see comments from a while ago. Other
than

 screening/boxing components and adding mucho surge protectors, is
there

 anything else that can be done that might actually work?

 Thanks!

 Chris Daum

 Oasis Montana Inc 
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