AC/DC BUS Flashcards
1
Q
What are the 4 AC busses?
A
AC bus 1
AC bus 2
AC ESS (essential) bus
AC SERV (service) bus
2
Q
AC Bus 1 priority system
A
Generator 1
APU generator
Generator 2
External power
3
Q
AC Bus 2 priority system
A
Generator 2
APU generator
Generator 1
External power
4
Q
What charges the main battery
A
AC BUS 1
5
Q
What charges the APU battery
A
AC service bus
6
Q
If TRU 1 and TRU2 both fail what ties close
A
CROSS TIE and ESS TIE to assist in splitting the load
7
Q
What powers the DC EMER BUS?
A
Powers fire protection powered by APU DIR BUS or BATT BUS
8
Q
EMER BUS is depicted only when
A
Bus has failed or one of the sources not powered
