Arjen de Korte wrote: > Citeren Per Jessen <[EMAIL PROTECTED]>: > >> I have a fairly old Compaq R3000h which is overdue for new batteries. >> Before I go and splash out a few hundred francs, I'd just need a >> quick sanity check - >> when I disconnect the power (UPS under load), it cuts out pretty much >> right away, so the batteries are flat (even though the charge >> indicator says full). > > That's usually the tell tale sign that the batteries are well past > their 'due to replace by' date. When was the last time you ran a deep > discharge test on them?
Not sure - I'll have to admit my ignorance and ask what is that? >> When I reconnect the power, the surge triggers a 16A mains >> fuse. This sounds to me to be due to the batteries being completely >> flat and thereby causing a major surge on startup? Sounds >> reasonable? > > Depends on whether or not anything is attached at that time. If a > number of computers is attached to the outlets, the combined inrush > current may already be enough to trigger a circuit breaker. The same > goes if it is not the only device connected on that group (maximum > load of a 16A fuse is about 3.7 kVA). I have two of these r3000, both with almost exactly the same load attached - each is about 2.2kVA. The other box does not trigger the fuse when power is reconnected. > So while I agree that it looks like the batteries need replacement, > this may not fix the above mentioned problem with the circuit breaker > popping. Note that some UPS'es (and I believe the Compaq R3000h is one > of them) allow for staged outlet switching. In that case it might make > sense to not start all systems at the same time (if you're not already > doing that). Uh, interesting option - I didn't know the R3000 might have that. I'll have to take a look. thanks, Per Jessen, Zürich _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/nut-upsuser
