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Wrenches,<br>
Here's a small issue on which I need help. It concerns the best
functional way to wire up an Outback PSX-240 balancing
autotransformer for a specific purpose.<br>
<br>
I have somehow succeeded in transferring the wiring diagram on page
6 of Outback's PSX-240 installation manual into this message. This
is for a step-down/generator balancing function. <br>
<br>
The situation: 8kW 240V AC generator serving an older system with a
single Trace SW4024. The 240V from the generator enters the PSX240
as wired according to the diagram. The primary role of the generator
is to provide occasional backup charging to the batteries through
the inverter. The specific issue is that the client also wants 240V
AC from the generator to be available to a single shop receptacle to
run a stationary woodworking tool. The generator is not large enough
to both run the tool and charge at full (33A @120V AC / 120A @24V
DC) AC2 amps in setting, and we don't want to reduce the charge
rate, as it's currently ideal for the new HUP industrial flooded
batteries.<br>
<br>
We initially tapped 240V off of the generator feed ahead of the 25A
two-pole breaker in the PSX-240. We instructed the customer to turn
off this 25A breaker when using the power tool (the tool circuit has
its own separate two-pole breaker). What we discovered, which is
obvious in hindsight, is that one of the generator's 120V AC legs
continues to feed the inverter AC2 input with the breaker off. This
causes the inverter to try to draw too much current from that AC
generator leg only.<br>
<br>
My question: could I solve this by simply moving the "120VAC to
Neutral" output feed (now tapped off of L2) shown on the drawing
below to the other side of the 25A circuit breaker; that is, to
point 4 in the drawing? It seems to me that this would work, and
would not intrinsically overload either of the two 25A poles of the
breaker. The 120V AC output to the inverter could in theory draw
50A; 25A from L2 and 25A through the windings of the transformer.
But this solution seems almost too simple. What am I missing,
please?<br>
<br>
<br>
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<p class="MsoNormal"><b>Allan <span class="SpellE">Sindelar</span></b><br>
<span style="font-size:10.0pt"><a
href="mailto:Allan@positiveenergysolar.com"><u><span
style="color:#000099">Allan@positiveenergysolar.com</span></u></a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional <br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b>, a Certified B <span
class="SpellE">Corporation<sup><span
style="font-size:7.5pt">TM</span></sup></span><br>
3209 Richards Lane<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112 office 780-2738 cell</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></p>
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