Electrics

Question 1

If an IDG fails and the APU is not available to power the related transfer bus

What will occur first if an electrical overload is sensed

Answer 1

Automatic load shedding of the galleys and main bus on transfer bus 2

Question 2

Under normal conditions what powers DC bus 1

Answer 2

TR1 and TR2

Cross tie relay allows TR1 and 2 to power DC bus 1 and 2 and standby bus with TR3 available for back up