The BC-6964 battery charger is designed for hazardous location applications requiring Class I, Div. 2 equipment. It accepts three-phase 60-Hz ac input and generates 24 Vdc 50 A nominal output. In voltage mode, it regulates to a factory-set dc voltage. While operating as a voltage source, it regulates its output voltage to provide optimal battery charging. If the output current demand exceeds a maximum setpoint, the charger transitions from voltage source to current limit and folds back the output voltage to limit the current to the maximum charge current (Alimit). As the battery load decreases to less than Alimit, the charger will return to voltage mode operation.