To protect against deep discharge of lead acid batteries in dc backup systems, Snaptec have introduced a new battery protection unit also known as low voltage disconnect unit (LVD).
The battery protection unit monitors the battery voltage and disconnects the battery before it is completely discharged leaving enough charge for essential loads and for better recharge.
The battery protection unit is designed for 12V and 24V systems with automatic detection of battery voltage.
One of the significant features of the battery protection unit is programmability to set connect and disconnect voltages. The battery protection unit also protects against over-voltage if the battery voltage goes above 16V for 12V systems and 32V for 24V systems.
The battery protection unit is fully solid state with Mosfet switches. The battery protection unit also offers an alarm that is activated if the battery voltage drops below the preset disconnect level. This alarm is delayed by 15 seconds to prevent false alarms due to temporary voltage dips.
Disconnection of the battery is also delayed by 1 minute. This is necessary to avoid disconnection due to temporary short dips. The battery disconnect is available in three current ratings of 40A, 60A and 100A.