208 V 2 pole meter solution [RE-wrenches]

[Steve Johnson]

Well, the solution, in this case is to add a "5th terminal"  this is a 
lug that gets added to the meter and allows a "form 12s network meter" 
to read 2 phases of a 3 phase service.  At least thats what I am told by 
local meter dept.  I may now check my other installation (which is out 
of town) against the inverter kwh and see if they are close.  I think 
the form 2s meter might read low if there is a problem.

google books link
http://books.google.com/books?id=c0EzRqhRrmsC&pg=PA50&lpg=PA50&dq=12s+network+meter&source=web&ots=w2bYhbBzn2&sig=yv6mrgRWuZqfkFNJqIwpFGapErw#PPA50,M1

An Account Reviewers Guide to Electric Meter Troubleshooting
 By Virgil Johnson

http://www.csu.org/extrx/util_dev_svcs/svc_standards/electric/chapter/appendix_e.pdf

page 4.

Jeff and Darryl say their installations are tracking the inverter kwh 
reading ok,  so I don't know what it all means.  The 5th terminal is a 
$6 add on and makes the local meter dept happy so I'll keep the local 
peace.

Steve

jeff wrote:
> 
> I concur with Darryl.  We've used several CL200 240V 3W (single phase) 
> glass
> bulb meters connected line to line on 208Y120 three phase service and 
> they
> work just fine, meaning that over time the meter reading and inverter
> E-total are within a few percent of each other.
> 
> If you have doubts or need meter help, Austin International in SC is 
> pretty
> helpful.
> 
> Jeff Irish
> Hudson Valley Clean Energy
> 
> -----Original Message-----
> From: Darryl Thayer [mailto:daryl_solar at yahoo.com] 
> Sent: Tuesday, December 11, 2007 5:26 PM
> To: RE-wrenches at topica.com
> Subject: Re: 208 V 2 pole meter [RE-wrenches]
> 
> 
> I am surprized if he is correct.  The meters work on
> 120 to 240 volt just fine, your power is single phase
> added to a three phase load, your meter is single
> phase, I think it will work.  Perhaps you can get
> intouch with the meter people.  
> Darryl
> --- Steve Johnson <stevejohnson at comcast.net> wrote:
> 
> > 
> > I have installed a SB 400US in a system with a PV
> > production meter.  The 
> > main meter is a 208v, 3 phase CT.  The PV production
> > meter is on the 
> > load side of the main meter.   From the inverter it
> > goes through an AC 
> > disconnect, through a 2 pole feed through meter
> > base, and onto a 2 pole 
> > breaker in the main panel.
> > 
> > The utility meter guy says his 2 pole 240 v
> > single(split) phase meter 
> > won't read the 208v 2 pole output of the Sunny Boy
> > correctly because it 
> > has a 240 volt coil in it.  Says they don't make a 2
> > pole 208 volt 
> > meter.
> > 
> > Is this right?  What to do?  I guess I could change
> > the meter out to a 3 
> > phase 208v meter base and they could put in a feed
> > through 3 phase 
> > meter, there just wouldn't be any power on the third
> > leg.
> > 
> > Anybody else run into this?
> > 
> > Steve
> > 
> > Steve Johnson
> > 
> > 
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Steve Johnson
LightWave Solar Electric
Nashville, Tennessee


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