BAT Challenger 350 Practice Exam

The maximum amperage from one generator on the ground is determined by the generator’s rated power and the aircraft’s electrical system protections. On the Challenger 350, each engine-driven generator is a 40 kVA unit supplying 115 VAC, 400 Hz to the buses. That rating translates to about 400 A of current available from a single generator when the aircraft is on the ground. The system’s protective devices and the generator control unit are sized to allow this level while safeguarding wiring, bus bars, and the generator itself, including enough headroom for startup surges. Values significantly lower would not reflect the generator’s capability, while higher values would exceed what the electrical system is designed to deliver and would trip protection. Hence, the practical maximum from one generator on the ground is 400 A.