SH 6 - Electrical Flashcards
1) What starts the battery charging cycle on the ground?
With external power on, select the batteries to Auto. Takes approx 20 mins.
2) Will the batteries completely drain if you leave the BAT switches in AUTO after AC power is removed?
No, automatic cut off logic prevents batteries from completely discharging when on ground
3) How is the BATTERY BUS normally powered?
Transformer rectifier (TR1)
4) What does the amber FAULT light in the GALY & CAB pb indicate?
Load on any generator is more than 100% rated output
5) How does the GALY & CAB pb work in AUTO?
Supplies main and secondary galley, in seat power & IFE system. Auto shed with only one generator operating.
6) What does a FAULT on the ENG GEN pushbutton indicate?
Associated GCU trios or line contactor opens
7) What does the APU GEN FAULT light indicate?
Associated GCU or contact opens.
Inhibited when contact opens after external power or ENG GEN takes over or APU speed too low
8) What is the function of the BUS TIE in the AUTO position?
Bus tie connectors close when on OEI or on APU or external power. Auto open when both engines running.
9) What does an IDG FAULT light indicate?
IDG oil outlet overheats or IDG oil pressure low.
10) What precautions must be taken when disconnecting an IDG?
Only MX can reconnect
11) How can an IDG be reset?
Only by Mx on the ground
12) What is the function of the AC ESS FEED pushbutton in the normal position?
AC ESS BUS supplied by AC Bus 1
13) How is AC ESS FEED transferred from AC BUS 1 to AC BUS 2?
Pushing AC ESS FEED pb
14) What does the AC ESS FEED pushbutton white ALTN light indicate?
AC ESS BUS being powered by AC Bus 2. Occurs automatically if AC Bus 1 lost and switch in auto, lights out position.
15) What is the purpose of the static inverter?
Transform DC power from Battery 1 into AC power (to supply AC Ess Bus).
16) What are the 3 times the batteries are connected to the BATTERY BUS?
- APU starting
- Battery voltage below 26.5V (battery charging)
- Loss of AC Bus 1 & 2 (Below 100kts when emer gen not supplying)
17) What is the priority sequence for electrical power (GEARB)?
G - Generators (engine) E - External power A - APU generator R - RAT emergency generator B - Batteries
18) What is the significance of the green and red collared circuit breakers on the Flight Deck?
Green are ECAM monitored
Red do not allow reset
19) What buses are powered by the emergency generator?
AC ESS BUS
AC ESS SHED BUS
DC ESS BUS & DC ESS SHED BUS (ESS TR)
20) What is the function of the MAN ON pb on the EMER ELEC PWR Panel?
Extends RAT manually
21) How long does it take the RAT to extend and provide power?
8 seconds (3 seconds for extension, and 5 seconds to pressurize the blue hydraulic system and power the EMER GEN)
22) What does the red RAT & EMER GEN fault light on the EMER ELEC PWR Panel indicate?
When emergency generator is not supplying power (AC BUS 1 & 2 are not powered)
23) What powers the emergency generator?
Blue hyd system
24) What is the difference in functionality of the MAN ON pb (EMER ELEC PWR Panel) and the RAT MAN ON pb (HYD Panel)?
No difference
25) What happens when you push the GEN 1 LINE pushbutton?
Gen 1 line contactor opens
26) When is the GEN 1 Line pushbutton used?
In smoke procedure to power AC Bus 1 from Gen 2
27) What does the amber SMOKE light in the GEN 1 LINE pushbutton indicate? (On EMER ELEC PWR panel)
Smoke detected in avionics bay
28) How would you know if the Blower and Extract fault lights were due to smoke?
When both have FAULT illuminated. Also have SMOKE on GEN 1 LINE pb.
