metering 1-phase inverter in 3-phase service? [RE-wrenches]

[Steve Johnson]

Hi Darryl,

A 5th terminal (jaw)can be added to a regular meter for about $6.  This 
terminal connects to the neutral lug with a jumper wire.  So if you 
don't have a neutral . . . ?  what could it measure?  I guess if you run 
a neutral you need the 5th terminal form 12s, but not if you don't run 
the neutral.

Steve

Darryl Thayer wrote:
> 
> Sorry to post twice, I took a look at meter diagram. 
> the 4 jaw meter has a voltage coil and two current
> coils to determine the power.  The Sunny Boy 5000US
> does not send power on the neutral I believe.  So the
> 4 jaw should work fine.  The 5 Jaw meter form 12S has
> two voltage coils and two current coils.  So it can
> acuracly measure the power on a (two legs) of a three
> phase power.  The 12S meter is not very expensive ,and
> Austin Inc (austininc.com) has low cost 5 jaw meters
> an meter sockets.  
> hope this is helpful
> Darryl
> --- Nicholas Ponzio <nponzio at buildingenergyus.com>
> wrote:
> 
> > Wrenches,
> > 
> > We're installing a Sunny Boy 5000US in a commercial
> > building with
> > 3-phase 208 (L1, L2, L3, N). The output of the SB
> > will only be
> > 1-phase, 208 (L1, L2, N). How do I meter this? Will
> > a standard 240V
> > kwh meter be accurate in this application or do I
> > need a 3-phase
> > meter?
> > 
> > Thanks in advance for any input.
> > -Nik
> > 
> 
> 
> 
>       ____________________________________________________________________________________
>       
> Never miss a thing.  Make Yahoo your home page. 
> http://www.yahoo.com/r/hs



Steve Johnson
LightWave Solar Electric
Nashville, Tennessee


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