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Lightning and fence chargers
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<blockquote data-quote="Texasmark" data-source="post: 1431864" data-attributes="member: 27848"><p>I doubt the "coil" has much to do with anything considering L d"i"/dt involved in a high voltage discharge of the magnitude of a lightening strike, but it looks cute. The gap is quite large and could be a lot smaller to jump at a lower voltage and having pointed ends at the minimum distance for arc-over would help, unlike just the opposite you see in the design...charge concentration is more dense with smaller diameters and arcs easier; the closer the contacts the lower the arc voltage. Think about it. A spark plug with a conventional ignition system has a gap of about .030" yet arcs at 10kv in air, and that's across very small terminals. An accompanying suitable ground rod and vertical attached conductor as long as practical would complement the installation if you wanted to go all out.</p><p></p><p>I went to battery operated chargers and solved my problem. I didn't do it, but with today's solar power, a solar powered battery charger should round out the installation. It gets your system off the electric grid and it's ground. After you blow the fuse holder apart a couple of times you get the idea that something else is needed.</p><p></p><p>I usually ran the hot wire inside 5 strand barbed wire with steel line posts on the 4" plastic standoff about shoulder high of a full grown bovine. This was a good place for bodily contact yet put it up above young calves. The other thing was that the fence put "ground" above the hot wire so contact is made with the fence, not your charger, per se.</p><p></p><p>The return for the charger (battery -) was connected to to the fence. When the bovine violated the fence it was usually touching a barbed wire too so that gave me a perfect closed circuit without worrying about whether or not the soil was wet and how far the bovine was from the charger.</p></blockquote><p></p>
[QUOTE="Texasmark, post: 1431864, member: 27848"] I doubt the "coil" has much to do with anything considering L d"i"/dt involved in a high voltage discharge of the magnitude of a lightening strike, but it looks cute. The gap is quite large and could be a lot smaller to jump at a lower voltage and having pointed ends at the minimum distance for arc-over would help, unlike just the opposite you see in the design...charge concentration is more dense with smaller diameters and arcs easier; the closer the contacts the lower the arc voltage. Think about it. A spark plug with a conventional ignition system has a gap of about .030" yet arcs at 10kv in air, and that's across very small terminals. An accompanying suitable ground rod and vertical attached conductor as long as practical would complement the installation if you wanted to go all out. I went to battery operated chargers and solved my problem. I didn't do it, but with today's solar power, a solar powered battery charger should round out the installation. It gets your system off the electric grid and it's ground. After you blow the fuse holder apart a couple of times you get the idea that something else is needed. I usually ran the hot wire inside 5 strand barbed wire with steel line posts on the 4" plastic standoff about shoulder high of a full grown bovine. This was a good place for bodily contact yet put it up above young calves. The other thing was that the fence put "ground" above the hot wire so contact is made with the fence, not your charger, per se. The return for the charger (battery -) was connected to to the fence. When the bovine violated the fence it was usually touching a barbed wire too so that gave me a perfect closed circuit without worrying about whether or not the soil was wet and how far the bovine was from the charger. [/QUOTE]
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