Placement of lightning rods [RE-wrenches]

[Drake Chamberlin - Electrical Energy]

<x-flowed>Could you say more about the problem with multiple ground paths?   With 
wind systems I've been advised to connect a ground rod to each leg of the 
tower.  I've had good luck in protecting systems that had previous damage.

Drake

At 06:33 PM 02/26/2001 -0800, you wrote:
>Soluciones Energéticas wrote:
>
> > We have a couple of clients who have had some problems with lightning and
> > we are in the process of installing lightning rods.
>
>Greetings Ned,
>
>Are these systems fully grounded to a really solid earth ground?  It is
>my understanding that lighting rods are used to attempt to avoid direct
>hits of lightning to a structure.  Most damage to PV systems comes from
>induced voltages from nearby lightning strikes, not from actual direct
>hits.  Also, these voltage surges often come in on other system wiring,
>not necessarily from the PV array itself.  If you are taking direct hits
>to a well grounded array you have my sympathy!  Otherwise you may want
>to take a long hard look at your grounding, and make sure there are no
>multiple ground paths and that SOV's are installed on both DC/PV
>conductors as well as any AC wiring.  Good luck -- Kurt Nelson.
>
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 michael.welch at homepower.com

____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01

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