Vertiv Liebert APM Plus - Advanced Function

2.5.2 Advanced Function
The UPS provides battery maintenance test function. At periodic intervals, 20% of the rated capacity of the battery will be
discharged automatically, and the actual three-phase load must exceed 20% of the nominal UPS capacity. If the load is less
than 20%, the automatic discharge cannot be executed. The periodic interval can be set from 30 to 360 days. The battery
maintenance test function can be disabled through the Vertiv software setting.
Conditions: Battery at float charge for at least 5 h, load equal to 20% to 100% of rated UPS capacity.
Trigger: Automatically or manually through the command of battery maintenance test in touch screen.
Interval: 30 to 360 days (default setting: 60 days).
The UPS also provides battery capacity self-test function: Periodically test the battery activity, test the battery residual
capacity, judge the battery quality, and then provide corresponding measures. The capacity self-test is started by the user
through the touch screen. During the capacity self-test, the battery will continuously discharge to the battery under-voltage
shutdown threshold. After the self-test is finished, the system will update the battery curve table. The capacity self-test
command is valid only one time, without any memory. During the capacity self-test, if the battery maintenance requirement is
satisfied, the system will generate audible/visual alarm and give corresponding records.
Conditions: System load rate is within 20% to 100%, battery float charge at least 5 h, and generator not connected; the current
system is in float charge state.
Trigger: Start up through the touch screen.
N O T E: The b attery will continuously discharge to the battery un der-voltage sh utdow n threshold,
then the battery w ill transfer to the charging state. W hen the cap acity self-test is finished , the
system w ill upd ate the battery curve table.
N O T E: The u ser can m anually stop the capacity self-test operation throug h the touch screen.
2 Overview
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Vertiv™ Liebert® APM Plus User Manual