Vertiv | Liebert EXS 80kVA UPS | User Manual
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Overview
1.5.2. Advanced Function
The UPS provides battery maintenance test function. At periodic intervals, 20% of the battery’s rated capacity is
automatically discharged, 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 ~ 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, evaluate 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 completed,
the system updates 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 met, the system generates
audible/visual alarm and give corresponding records.
Conditions:
System load rate within 20% ~ 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.
• The battery will continuously discharge to the battery undervoltage shutdown threshold and then the
battery transfers to the charging state. When the capacity self-test is completed, the system updates
the battery curve table.
• The user can manually stop the capacity self-test operation through the LCD.
• The battery capacity self-test needs to guarantee the discharge time not less than 6 min, otherwise
the battery self-learning time may be insufficient and the battery curve will not be updated.
1.5.3. Battery Temperature Compensation
The UPS system has battery charge temperature compensation function. When the ambient temperature is
increased, the DC bus voltage (which charges the battery) is reduced correspondingly to provide optimal charging
voltage for the battery, thus prolonging the battery service life time.
This function must be used in conjunction with the Vertiv battery temperature detection device (a standard
option).
Summary of Contents for EXS 0080kTK16FN01000
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