by ViperPilot » Tue Jan 29, 2013 4:02 pm
From the Aviation Week article:
"... In the case of the auxiliary power unit (APU) main battery which caught fire in the JAL aircraft, the unit is connected through the large motor power system in which a controller handles the input from the 235-volt alternating current (VAC) starter/generators on the main engines, external power (from the ground) and the battery itself. The forward (main) battery, which is the focus for the ANA investigation, is connected to the electrical system via a 28-volt direct current (VDC)/235-VAC power converter. The charger system was developed by Tucson, Ariz.-based Securaplane, which bills itself as a