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Chapter 12 Helpful information
How ABM works
Three-stage charging: ABM increases battery life by 50 % via a three-stage charging process.
The microprocessor-controlled technology rapidly charges the battery via the following three
steps. (See
Figure 65
Charge: A rapid constant current charge brings the battery to near full capacity in
•
approximately three hours compared to 15 or more hours with many other UPSs.
Float: Next, a constant voltage trickle-charge (of 2.3 volts per cell), similar to that used
•
in other UPS units, continues for approximately 48 hours or until the batteries are solidly
"topped off".
Rest: At this point, the charger is turned off.
•
The charger is turned on again when required due to use or natural decay during extended
periods of non-use. This means that UPS units with ABM technology are more energy efficient,
only being charged on an average of a few minutes a day. Since UPS batteries use the same
technology as car batteries, a simple correlation can be observed. It is easy to see that car
batteries, which are charged on when the car is running, typically last two to three times
longer than traditional UPS batteries due to the "rest" state that occurs when the car is not
running. If car batteries were constantly trickle-charged, they too would last less than two
years.
Advanced notification: ABM is the only technology currently available that reliably provides
true advanced notification prior to battery failure.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
)
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