grounding of wind towers [RE-wrenches]

[Dana Orzel]

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This is not wind generator grounding but interesting if you are in a
lightning prone area........
For lightning diversion, I have had recommended by South West Wind Power [15
years ago], to have the conduit to the power house turn a couple of sharp 90
deg. offsets right and left after the base. It seems that lightning in the
earth conduits like to travel in straight lines and these 90's shed the main
force into the surrounding earth. I have done this on all installations and
had at least 2 towers struck directly and with only a LA-302 SOV  at the
power house and had no damage, other than the wind generator was
sizzled......

Dana Orzel
Great Solar Works, Inc.
"Responsible Systems For Responsible People"
dana at solarwork.com
970.626.5253 - H/O
970.209.4076 - C
970.626.4140 - F
-----Original Message-----
From: Kirk Herander [mailto:kirk at vtsolar.com] 
Sent: Wednesday, November 02, 2005 3:46 PM
To: RE-wrenches at topica.com
Subject: grounding of wind towers [RE-wrenches]

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Group,
 
We've probably covered this before, but what's the best way to ground a
wind generator tower? I usually drive a rod at the base and all guys,
and ground the tower as well as all guy levels. Then put a lightning
arrestor at the tower base where the splice to larger wire is and
connect the arrestor neutral/gnd to the rod at that location. As most
generator manuals do not discuss grounding and lightning protection, I
wonder if I'm going too far or not far enough. And is it wise to connect
the tower ground to the system (house) ground in all cases? Exceptions?
 
 
Kirk Herander
Vermont Solar Engineering
802.863.1202
fax 802.863-7908
NABCEP(tm) Certified Solar PV Installer
Xantrex Certified Dealer Charter Member
NYSERDA-eligible installer
VT Solar and Wind Partner
 

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