Kirk- The spec sheet for the 75 kva Acme transformer I just bought shows 98% efficiency.
I'm planning to use this to connect 480 volt solar inverters to a 208 VAC main panel.
Then a line side tap to bypass the existing 600 amp busbars in the 208 VAC panel since they won't be sufficient for the solar current backfeed with the 120% rule.
Is this what you have in mind also?
Don Barch
Energy Solar
-------- Original Message --------
Message: 3
Date: Mon, 9 Dec 2013 11:57:57 -0500
From: "Kirk Herander" <k...@vtsolar.com>
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Subject: [RE-wrenches] 3-phase xformer efficiencies
Message-ID: <006f01cef4ff$cffd39c0$6ff7ad40$@vtsolar.com>
Content-Type: text/plain; charset="us-ascii"
Hello folks,
Generally speaking, what is the efficiency range of a 480 to 208 3-phase
delta xformer, common in industrial settings, rated from 35 to 75kva?
Thanks.
Kirk Herander
VT Solar, LLC
dba Vermont Solar Engineering
NABCEPTM Certified Inaugural Certificant
NYSERDA-eligible Installer
VT RE Incentive Program Partner
802.863.1202
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