The BTL fast NiCad battery charger incorporates microprocessor controlled
electronics to ensure stand by batteries are always in a good state of charge.
The charger runs off a standard 220V 50Hz supply and is capable of re-charging
a fully discharged battery in 6 hours. Under normal conditions the batteries
are trickle charged to maintain full capacity. After a power failure the charger
switches to boost charge to restore the batteries in the minimum time. The
mains voltage, the charger state and batteriy terminal voltage are constatnly
monitored to determine the operating conditions. A manual override is provided
so that a boost charge can be aplied and a thermal trip can be used for additional
protection if required.

