This specification establishes the performance and verification requirements for each of the following Power Supplies: the PP-2953D/U and the PP-6224C/U . The power supply furnishes 0-25 amperes over a voltage range of 24 to 32Vdc from nominal 115/230 Vac at 50, 60 or 400 Hz single phase. The power supply can also operate from a 24 Vdc storage battery in the battery standby mode.