Experience with 3 Phase High Leg Delta? [RE-wrenches]

[Jeff Clearwater]

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Hello Fellow Wrenchers,

I'm in the final stages of designing a 10KW system using Sunny Boys. 
However we just found out that our 3 phase service is not the normal 
Wye 208/120 VAC but 240/120 VAC High Leg Delta (and possible High Leg 
"Open" Delta as there are two transformers on the pole).

See:

http://www.tpub.com/doeelecscience/electricalscience2184.htm for a 
basic description of this configuration and

http://ths.gardenweb.com/forums/load/wiring/msg0218531810487.html 
for a discussion on some of the issues involved.

Anyone out there have experience with connecting Sunny Boys to this 
configuration?  Since the SB 240 Volt connects to 2 Legs and the 
Ground, the High Leg to Neutral voltage of 208 may not matter.  I'm 
checking with John B and Kent S. but wanted to see if anyone had 
actually installed one.

The other option is just to use a transformer to change the High Leg 
Delta to normal Wye 208 and use the SB 208 VAC.  That may be easier 
in terms of balancing legs.

Can anybody help with this?

Thanks,

Jeff
-- 
~~~~~~~~~~~~~~~~~~~
Jeff Clearwater
Ecovillage Design Associates
Home, Community and Village Scale Renewable Energy Systems

2525 Arapahoe Ave, Suite E4, #280
Boulder, CO 80302
1-800-440-2523 PIN7071
Fax:  720-528-7813
clrwater at earthlink.net
jeffc at ic.org

Council Member - Ecovillage Network of the Americas - http://www.ecovillage.org
Founder:  Ecovillage Research, Development, and Demonstration Program:
http://www.home.earthlink.net/~clrwater/RDD/rdd.html
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