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| Newer page: | version 4 | Last edited on Wednesday, June 20, 2007 5:17:46 pm | by AristotlePagaltzis | |
| Older page: | version 3 | Last edited on Wednesday, June 20, 2007 4:19:14 pm | by JohnMcPherson | Revert |
@@ -1,10 +1,13 @@
[Acronym] for __U__ninterruptable __P__ower __S__upply.
-Basically
a big battery that will run your computer for a short time when the power goes out. There are two major types Online and Offline. An Online [UPS] is charging the battery constantly from the mains and drawing
power from the battery
to run
the computer(s
). This means that
your computer
is isolated from any power spikes
or brownouts that might occur. An Offline
[UPS
] has a battery that
is charged,
and is switched inline when
the power drops below a certain level. Usually protects you against brownouts, but has less protection from spikes
.
+Roughly speaking, this is
a big battery that will run your computer for a short time when the power goes out. It isn’t usually large enough to maintain
power to the computer for an extended length of time
(hours
) (unless
your money:IQ ratio
is too high,
or, like
[zcat | BruceKingsbury
], you've been given four perfectly OK 21-plate truck batteries, which he says should sustain 12 hours of standby power, even with the screen on). It
is there to handle short power outages (<10 minutes)
and then allow
the machine to shut down cleanly
.
-a [UPS] is usually only there to smooth the power and handle short power outages (<10 minutes) and then allow the machine to shutdown cleanly. A [UPS] usually is not large enough to maintain power to the computer for an extended length of time (hours), unless your money
:iq ratio is too high.
+There are two major types
:
-'' Or if you're lucky
and got given four perfectly OK 21-plate truck batteries; I'll have to crash-test but I think I have
at least 12 hours of standby
power now, even with
the screen on
.. - zcat ''
+* Online [UPS] is constantly charging the battery from the mains
and at the same time drawing
power from
the battery to run the computer(s)
.
+* Offline [UPS] keeps a charged battery around to switch it inline when the power drops below a certain level.
+
+Online [UPS] will therefore isolate your computer from any power spikes or brownouts, whereas offline [UPS] usually protects it against brownouts but hardly from spikes
.
----
See also [UPSNotes]
