SW Tripping DC 250 Breaker [RE-wrenches]

[Allan Sindelar]

Travis,
Haven't faced this before. A couple of ideas to consider:
1. Two wire well pumps are much harder to start than three wire pumps, which
include a capacitor-based starting circuit. My Franklin catalog rates both
at 6.8A @240AC running, but locked rotor amps for the 3-wire is 34.2; for
the two-wire it's 40.7. No specific ratings about maximum starting draw. A
pump changeout would probably solve it.
2. You might consider using a T240 as a step-down transformer to draw evenly
from both inverters and thus both GJ breakers. Use a 2P relay on the primary
(240V) side of the T240 to avoid phantom load losses.
3. John Mottl at Rainshadow Solar (360-376-5336) might be able to supply you
with a longer-delay GJ breaker, or have another suggestion.
4. You could build a relay control to temporarily disconnect the AC when the
pump comes on.

Hope this helps.
Allan at Positive E


----- Original Message ----- 
From: "Travis Creswell, Ozark Solar" <ozsolar at ipa.net>
> If the RV air is running WHEN the well pump tries to start, the 250 amp
> breaker trips on the SW4024 that the RV AC is on before the pump can
> start. I can watch the amps on the TM climb to just under 400 before the
> breaker trips.  Remember that the TM is a little slow so I'm guessing
> that means something like 600-800 amps.

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