How many amps from ground power are required for charging batteries or starting the APU?

How many amps from ground power are required for charging batteries or starting the APU?

• A. 600 amps
• B. 400 amps
• C. 1000 amps
• D. 200 amps

Answer: (A)

When charging batteries or starting the APU, the electrical system needs a large, immediate amount of current from ground power to replenish the battery banks quickly and to provide the surge required to start the APU. The Longitude 700 is designed to require about 600 amps from ground power for these tasks, ensuring enough current even if the batteries are low or temperatures are cold. If the ground power unit can’t deliver this level, charging could take longer and the APU might fail to start, especially under challenging conditions. The 600-amp rating is the specification that guarantees reliable battery charging and APU starting, which is why it’s the correct requirement.

When charging batteries or starting the APU, the electrical system needs a large, immediate amount of current from ground power to replenish the battery banks quickly and to provide the surge required to start the APU. The Longitude 700 is designed to require about 600 amps from ground power for these tasks, ensuring enough current even if the batteries are low or temperatures are cold. If the ground power unit can’t deliver this level, charging could take longer and the APU might fail to start, especially under challenging conditions. The 600-amp rating is the specification that guarantees reliable battery charging and APU starting, which is why it’s the correct requirement.