[RE-wrenches] Electric fence, metal buildings, lightning protection systems

[Jeff Irish]

Not only are the voltages on these agricultural electric fences pretty high as Roy mentions, but many supply the voltage as a pulsed square wave and therefore generate harmonics and noise too.  Electrical separation is necessary, and some distance will help.

Jeff Irish
Hudson Solar

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Roy Butler
Sent: Friday, December 06, 2013 2:54 PM
To: erika at repowersolutions.com; RE-wrenches
Subject: Re: [RE-wrenches] Electric fence, metal buildings, lightning protection systems

Erika,

That electric fencer needs it's own grounding electrode system!

Unlike the premises grounding system, where there's normally no voltage present, the fencer's
ground completes the circuit.

I have measured over 12,000 volts on our farm fencer grounding conductor....I have learned not to
touch it....had to try it 2 or 3 times to be sure though ;-)


Roy Butler

NABCEP Certified Solar PV Installer(r)

NYSERDA eligible PV & wind installer

Four Winds Renewable Energy, LLC

8902 Route 46, Arkport, NY 14807

607-324-9747  www.four-winds-energy.com<http://www.four-winds-energy.com>



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Although no trees were killed in the sending of this message,

a large number of electrons were terribly inconvenienced.




On 12/6/2013 2:31 PM, Erika Weliczko wrote:
SB3000TL-US inverters.
The concern is possible voltage that may lead the inverter to believe there is a ground fault because of fence connections.
I wonder what the tolerable window of voltage of + or - to ground is for this unit before it cries GF.

During a drizzle I had a little tingle while assembling EMT. I did not get a meter out, but it sorta felt like a 9V battery across your tongue.
In the end even a little tingle is not really supposed to be there...


Regards,
Erika

From: jay peltz [mailto:jay at asis.com]
Sent: Friday, December 06, 2013 11:05 AM
To: erika at repowersolutions.com<mailto:erika at repowersolutions.com>; RE-wrenches
Subject: Re: [RE-wrenches] Electric fence, metal buildings, lightning protection systems

Hi Erika,
What seems to be the issue?
And what equipment ( inverters ) are you using

Jay

Peltz power




On Dec 6, 2013, at 5:57 AM, "Erika Weliczko" <Erika at RepowerSolutions.com<mailto:Erika at RepowerSolutions.com>> wrote:
Anyone had to contend with electric fence installation (AC controller) using a ground rod (not main service) at remote farm building and messing with inverters? And perhaps causing other issues?

Of course, this is a metal roof with a lightning protection system (i.e. bare braided copper on roof all the way to rod.)

I think we need to redirect the electric fence wire to its own dedicated rods, away from the building that has solar.

Insights are appreciated.

Thanks,
Erika

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