[RE-wrenches] Open Delta to 208Y/120 Volt

[William Miller]

Drake:

You should be able to connect to a 120/240 split phase feeder. Avoid the
stinger. I have done it with FXRs , works just fine.

Wm

On Tue, Jun 6, 2023 at 8:11 AM Drake Chamberlin via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hello All,
>
> We are looking for a transformer to connect Sol-Ark inverters to an open
> delta service. The Sol-Ark can only connect to a Wye configuration.
>
> We found one which the supplier says will do the job. It is an MGM, 240
> Delta to 208Y/120 Volt, 3-Phase.
>
> The supplier says this will derive a neutral which can be grounded for a
> solid neutral connection.
>
> My concerns with what we have found so far are:
> 1) How much efficiency will be lost due to connecting to an open delta?
> 2) Will the derived neutral really be sufficient?
> 3) The cost of the unit we found is high. Does anyone know of a source
> for economically priced transformers.
>
> Thank you,
>
> Drake
>
> Drake Chamberlin
> Athens Electric LLC
> Ohio Electrical Contractor’s License 44810
> CO Master Electrician’s License 4526
> NABCEP Certified PV Installation Professional
>
>
>
>
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William Miller
Miller Solar.com
805-438-5600
www.millersolar.com
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