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Re: [TowerTalk] Antenna/Tower Grounding (Lightning Protection)

To: "'Jim Lux'" <>, <>,<>, <>,<>
Subject: Re: [TowerTalk] Antenna/Tower Grounding (Lightning Protection)
From: "Gary Schafer" <>
Date: Thu, 4 Jan 2007 11:05:29 -0500
List-post: <>
> >  A common
> >direct stike is 100 kA with a risetime of 8 us, correct?
> A more common waveform would be rise time of 2 microseconds, fall to
> 50% in 50 microseconds.  Typical average stroke is 20-30kA.  100kA
> would be a big-un

The industry standard for protection device comparisons is a waveform of
8x20 microseconds. You want to see how much energy is let through with a
given size strike with that wave form. If they don't tell you the let thru
energy, look to someone else.

However as Jim noted 2 microseconds is a more typical lightning rise time.

Gary  K4FMX


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