Electrics

Question 1

What is the minimum speed for the RAT?

Answer 1

140kts

Question 2

How many aircraft batteries?

Answer 2

2

Nickel cadmium batteries

28V 23Ah

Question 3

Can the AC ESS BUS 1 be powered by AC BUS 2?

Answer 3

Yes, automatically via the AC ESS FEED

Normally powered by AC BUS 1 via a contactor

Question 4

2 conditions for disconnecting the IDG

Answer 4

Engine must be windmilling

DO NOT PRESS FOR MORE THAN 3 seconds!!!

Question 5

When will the IDG fault light illuminate?

Answer 5

If oil temp exceeds 180°C

Low oil pressure (inhibited when N2<14%)

Question 6

How long does the RAT take to extend?

Answer 6

5s for extension

+3s for power

Question 7

If GEN 1 is offline it still powers

Answer 7

2 fuel pumps and 1 igniter

Question 8

How long does the APU take to auto shutdown after providing air-conditioning?

Answer 8

60-120s at 75%

Question 9

When will the RAT auto deploy?

Answer 9

AC BUS 1 & AC BUS 2 unpowered

(Speed must be >100kts)

Automatically powers the BLUE hyd system which drives the EMER GEN

Question 10

What BUS bars are available with only emergency GEN operating?

Answer 10

AC ESS BUS
DC ESS BUS (via the ESS TR)

Question 11

Below 100kts how is the DC BAT BUS powered?

Answer 11

Batteries

Question 12

CBs

Green
Black
Red

Answer 12

Green - monitored (by panel) ECAM after 1 min

Black - not monitored

Red - only reset by maintenance

Question 13

CB collars

Black
Yellow
Red

Answer 13

Black - system permanently deactivated or not installed

Yellow - system deactivated

Red - CVR/FDR deactivated IAW SOP

Question 14

Why do Wing Tip Brakes (WTB) have red caps?

Answer 14

To prevent reset

Question 15

AC power connection priority

Answer 15

ENG GENs
GPU
APU

Question 16

When will a battery fault light illuminate?

Answer 16

When the charging current for the corresponding battery is outside of limits

In this case, the contact opens

AMBER “BAT 1/2” light on overhead panel

“ELEC BAT 1/2 FAULT” on ECAM

Question 17

Is the TAT probe heated?

Answer 17

Yes, only in flight

Question 18

What is powered on the ground (<50kts) by BAT 1 & 2?

Answer 18

HOT BUS 1&2 (always)
DC BAT BUS
DC ESS BUS

Question 19

What is powered In flight with BAT only?

Answer 19

HOT BUS 1&2 (always)

BAT 1 supplies AC ESS BUS (via the STA INV)

BAT 2 supplies DC ESS BUS

Question 20

MAINT BUS ON

Answer 20

Provides power for ground services if EXT PWR connected

Question 21

5 AC sources?

Answer 21

2 ENG GEN (IDGs)
APU
EMER GEN (RAT)
EXT PWR
STATIC INVERTER

Question 22

AC PWR from IDGs

Answer 22

Three phase 90kVA 115/200V 400hz

Priority over all other PWR sources

Question 23

DC PWR sources

Answer 23

2 Batteries
3 TRs (Transformer Rectifiers)