Re: [RE-wrenches] PV to 208v 3-phase with high leg

2011-04-08 Thread David Brearley 
Charlie,

The installation manuals for the inverters you work with should clarify the
acceptable service configurations. That¹s where I would start. (Actually,
verify the service type first by having your electrician take line-to-line
and line-to-neutral measurements at the service.) If you¹re talking about a
240 delta service with a 208 V high leg, you could interconnect a 3-phase
central inverter that doesn¹t require a neutral connection; I believe Satcon
fits this description. Or you could stack single-phase inverters
line-to-line with at least one of the inverters configured such that it
doesn¹t need to see the neutral. There may be a specific pin configuration
that you need to set inside the inverter to enable operation without the
neutral.

This John Berdner article on scaling up PV system designs appeared in the
very first issue of SolarPro and includes some electrical service type
diagrams that may be helpful:

http://solarprofessional.com/article/?file=SP1_1_pg32_Berdner

David Brearley, Senior Technical Editor
SolarPro magazine 
NABCEP Certified PV Installer 
david.brear...@solarprofessional.com
Direct: 541.261.6545


On 4/7/11 11:06 PM, Aladdin Solar cpick...@aladdinsolar.com wrote:

 What is the best approach to interconnecting with a 208 volt 3-phase service
 having a high leg? Small to medium sized PV systems.
  
 Charlie Pickard
 Aladdin Solar
 
 
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[RE-wrenches] PV to 208v 3-phase with high leg

2011-04-07 Thread Aladdin Solar 
What is the best approach to interconnecting with a 208 volt 3-phase service 
having a high leg? Small to medium sized PV systems.

Charlie Pickard
Aladdin Solar
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Re: [RE-wrenches] PV to 208v 3-phase with high leg

2011-04-07 Thread Darryl Thayer 
the usual 208 3 phase is Y and not have high leg.  sometimes you will measure 
up 
to 208 on the high leg of at Delta high leg to neutral.  If it is Delta 3 phase 
120-240 and a 200 about volt high leg, connect across the 240 volt legs, I e 
that is across each phase they should be 240 each leg to leg connect the 
neutral 
only if you have one in that phase.  both Fronius and SMA have nice drawings in 
their installation guidelines or at their training courses.  






From: Aladdin Solar cpick...@aladdinsolar.com
To: re-wrenches@lists.re-wrenches.org
Sent: Thu, April 7, 2011 11:06:55 PM
Subject: [RE-wrenches] PV to 208v 3-phase with high leg

 
What is the best approach to interconnecting with a  208 volt 3-phase 
service having a high leg? Small to medium  sized PV systems.
 
Charlie Pickard
Aladdin  Solar
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