Vertiv Liebert EXS 80kVA UPS, User Manual

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Vertiv™ Liebert EXS 80kVA UPS User Manual
1 Overview
6. EOD protection
When the battery voltage drops to the EOD voltage, the battery converter shuts down automatically and
the battery is inhibited to avoid further battery discharge. The EOD voltage is settable from 1.60 V/cell to
1.90 V/cell (VRLA).
7. Battery low pre-warning time
The battery low pre-warning time is adjustable between 3min and 60min. The default setting is 5 mins.
8. Maximum battery discharge time
When the battery has small current discharge for a long time, the battery is over discharged and even has
unrecoverable damage, thus setting a battery discharge time to protect the battery is essential. The limit of
time setting shall be configured by service engineer through the Vertiv setting software.
9. Maximum boost charge protection time
To protect against the battery overcharge damage caused by long time boost charge, a protect time
setting is essential. The limit of time setting shall be configured by service engineer through the Vertiv
setting software.
1.5.2 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 setting software.
Conditions: Battery at float charge for at least 5h, load equal to 20% ~ 100% of rated UPS capacity.
Trigger: Automatically, or manually through the command of battery maintenance test in LCD.
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 operator control and display panel. During the capacity
self-test, the battery will continuously discharge to the battery undervoltage 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 within 20% to 100%, battery float charge at least 5h, and generator not
connected; the current system is in float charge state.
Trigger: Start up through the LCD.
NOTE: 1. The battery will continuously discharge to the battery undervoltage shutdown threshold,
then the battery transfer to the charging state. When the capacity self-test is finished, the system will
update the battery curve table.
2. The user can manually stop the capacity self-test operation through the LCD.
3. The battery capacity self-test needs to guarantee the discharge time not less than 6min, otherwise
the battery self-learning time may be insufficient and the battery curve will not be updated.