The typical standard is a generator should be able to produce twice the amperage of the load you expect. Maybe thats because genset guys like selling bigger generators but all the docs I have seen from UPS manufacturers state the same thing. They all produce cleaner power at the mid range of what they are capable of.
When we had a 100kva genset on a 25kva load you could always tell when it went from power company 408 to genset because all three legs of power would become perfect and in balance for the period it ran. Once it flipped back to mains power they converted back to their normal out of whack state. On Tue, Aug 13, 2019 at 9:25 AM Chuck McCown <[email protected]> wrote: > It will run cooler too. > > Sent from my iPhone > > > On Aug 12, 2019, at 8:53 PM, Adam Moffett <[email protected]> wrote: > > > > I might be a weirdo, but I figure a 50amp subpanel is 12kva, so I got a > 16kva generator for the 50 amp sub-panel fed by a 50 amp breaker from the > main panel. > > > > The reason for the generator being bigger than the sub-panel is that you > can't put 12kva on the 12kva generator unless you perfectly balance both > hot legs. Since that won't happen, I bump the generator up a notch. It's > a sub-panel so if someone ever trips the 50amp breaker we'll know right > away that there's more load than the generator could handle rather than > finding out when the power is out and nobody's there. > > > > > >> On 8/12/2019 9:34 AM, Chuck McCown wrote: > >> I would get the one larger than you need with an automatic transfer > switch. I have had ok luck with geneac units. You want it large enough to > be able to start the hvac system, > >> > >> Sent from my iPhone > >> > >>> On Aug 11, 2019, at 9:51 PM, Rhys Cuff (Latrobe IT) < > [email protected]> wrote: > >>> > >>> --_000_98489c14e6d04e6dbe7ba554592e77b2latrobeitcomau_ > >>> Content-Type: text/plain; charset="us-ascii" > >>> Content-Transfer-Encoding: quoted-printable > >>> > >>> Hi Guys > >>> > >>> I'm after a small 5kva generator for the server room > >>> Will be feeding a 3kva ups. > >>> > >>> Do you think its required to get an inverter generator? > >>> Being is only going to be used as a charger and the UPS will clean the > powe= > >>> r up. > >>> > >>> Thanks > >>> > >>> Rhys > >>> > >>> > >>> > >>> --_000_98489c14e6d04e6dbe7ba554592e77b2latrobeitcomau_ > >>> Content-Type: text/html; charset="us-ascii" > >>> Content-Transfer-Encoding: quoted-printable > >>> > >>> <html xmlns:v=3D"urn:schemas-microsoft-com:vml" > xmlns:o=3D"urn:schemas-micr= > >>> osoft-com:office:office" > xmlns:w=3D"urn:schemas-microsoft-com:office:word" = > >>> xmlns:m=3D"http://schemas.microsoft.com/offi > > > > > > -- > > AF mailing list > > [email protected] > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- Lewis Bergman 325-439-0533 Cell
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