Ok, I'll bite.First, some diffnitions.. from Delmer's Standard (ISBN-13: 978-1-4180-6580-5):Apparent Power (VA) is the value found by multiplying the applied voltage by the total current of an AC circuit. Apparent power is measured in volt-amps (VA) and should not be confused with true power,
Square-D tells me they have tested the breakers to a higher voltage (can't
recall now whether it was 80V or 125 VDC) but the listing is indeed for 48
Volts. 24V battery systems are useful for a lot of applications, but the
unfortunate lack of a 5A breaker means we can not use them to derive a
Voltage is not the issue here, it is current, and battery fault currents can be
staggering - far more than one would ever encounter in a typical AC system fed
from a distribution transformer. I have seen a 200A Class T fail to act on an
48V inverter fault which resulted in welding the metal
Small (QO or Airpax-type) breakers in a distribution bank should be front ended
with a suitable DC master breaker or fuse that has the capability to interrupt
the available fault current. Ideally, the series combination should be rated
but at a minimum, a coordination study should be
My understanding was that the din mountable QOU breakers were rated to 125 vDC,
and are internally the same as the QO. The difference was the connectors, and
the mounting method.
I've used the QOUs reliably at 120 v nom on an EV, (but don't try this at home,
kids)
We still use the QOs sometimes
Has anyone had any experience with the fairly new Solmetric Suneye 210
shading analysis tool?
Feedback and observations?
Or how about with their earlier version the Suneye 110?
Thanks,
marco
provision_highres_solar_logo2 with C-26351
Marco Mangelsdorf, President
69 Railroad
Kurt
Fascinating story and valuable information. This is the kind of real world
experience we need to draw on. Reality can change quickly under extreme
conditions and one's education is not complete without this understanding.
Thanks for this post.
William Miller
PS: You are fortunate
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