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

[Jeff Clearwater]

<x-flowed>
Hi Matt,

Yes you are absolutely right, should have caught it earlier but 
fortunately nothing was committed or ordered yet.  The face plates of 
all the panel equipment says 208 volt and much of the 3 phase loads 
say 208 and the campus electrician had referred to 208 volt many a 
time.  I do always check but I wasn't at the site for most of the 
design process.  Exactly the reason for this visit, to double check 
things before final design.

So as Matt says, heads up to all 3 phase installations out there.  Do 
not in any way assume 208 VAC on a 3 phase system!  Check it out 
first thing no matter what name plates say!.  (A High Leg Delta will 
show 120 V to N on two of the legs but on the third leg you'll see 
between 190-208 VAC).

Not withstanding I'm still looking for any experience on this.

Thanks!

Jeff

>
>The immediate thing this brings to mind is, from experience here, why are
>you in the "final stages of design" before you found this out?  (We have had
>various contractors and, yes, even SMUD personnel design systems like this,
>only to find out at the time of install or just prior what the actual
>Voltage Configuration is at the site.  Kinda embarrassing!)  At least you
>caught it now!
-- 
~~~~~~~~~~~~~~~~~~~
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email to: RE-wrenches-unsubscribe at topica.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================


</x-flowed>