<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Kirk- The spec sheet for the 75 kva Acme transformer I just bought shows 98% efficiency. </div><div>I'm planning to use this to connect 480 volt solar inverters to a 208 VAC main panel.</div><div>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. <br></div><div>Is this what you have in mind also?</div><div><br></div><div>Don Barch</div><div>Energy Solar<br></div>
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Message: 3<br>
Date: Mon, 9 Dec 2013 11:57:57 -0500<br>
From: "Kirk Herander" <<a href="mailto:kirk@vtsolar.com">kirk@vtsolar.com</a>><br>
To: "RE-wrenches" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
Subject: [RE-wrenches] 3-phase xformer efficiencies<br>
Message-ID: <006f01cef4ff$cffd39c0$6ff7ad40$@<a href="http://vtsolar.com">vtsolar.com</a>><br>
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Hello folks,<br>
<br>
Generally speaking, what is the efficiency range of a 480 to 208 3-phase<br>
delta xformer, common in industrial settings, rated from 35 to 75kva?<br>
Thanks.<br>
<br>
Kirk Herander<br>
<br>
VT Solar, LLC<br>
<br>
dba Vermont Solar Engineering<br>
<br>
NABCEPTM Certified Inaugural Certificant<br>
<br>
NYSERDA-eligible Installer<br>
<br>
VT RE Incentive Program Partner<br>
<br>
802.863.1202<br>
<br>
<br>
<br>
</div>
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