Is this cable that strings along, or is there another cable
that goes down the pole, too?
Stringing along is a little easier, like those booster amps
in a telco line. Can you copy their techniques?
Regarding spikey rods... aren't those used on the high
tension towers around there, too?
My advice is to do a conservative filter-like design using
the spectral characteristics of those protection devices.
For example, the gas discharge don't come on right away,
big delay. Design using RF/uWave techniques for the
physical construction, too. Think in terms of planes for
the voltage distribution, and those are "resistive" planes.
For current paths, think in terms of turns on an "implied"
transformer.
You can get pretty close with simulation analyses and some
hypothetical excitation models.
- Robert -
As I recall, energy centers around 1-10MHz with distructive
characteristics way up past 100MHz.
On Wed, 31 Aug 2005 10:57:13 -0400
[email protected] wrote:
> Hello Colleagues,
>
> We are investigating electronic devices mounted on poles
> in an outdoor
> environment that appears to have a degree of
> susceptibility to lightning,
> here in the lightning capital of the world... :-(
>
> I know the standard assessment that says one can protect
> devices, to a
> point; no protection is good for a direct hit. The
> devices we are
> investigating are board protected with gas discharge
> tubes and transient
> suppressors in close proximity to the cabling entrance
> point.
>
> Can someone point me to additional information about
> installation practices
> for devices up on a pole (20-40 feet high) that will make
> the immunity to
> lightning more robust? Is the application of "lightning
> rods" appropriate
> for this type of application?
>
> Don Umbdenstock
> Manager Compliance Engineering
>
> Tyco Safety Products / Sensormatic
> 6600 Congress Avenue
> Boca Raton, FL 33487 USA
> 561.912.6440
> [email protected]
>
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