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UPS for 480 Vac Grid, User Guide, doc. rel.4.0
Although the battery is disconnected from the load, there is still a small voltage drain on the
battery from other sources. If this drain continues for a long period of time it can result in a deep
discharge of the battery, which shortens battery life.
To protect the battery from deep discharge, the LVD function (Low Voltage Disconnect) enables
the user to define a time interval after which the battery disconnects completely from all drainage
sources.
Figure 78: LVD Battery Protector
