Electrical Limitations

Question 1

How many start attempts can be made on battery power only?

Answer 1

3/hour

Question 2

Minimum battery voltage for battery start?

Answer 2

24V

Question 3

Maximum GPU voltage for battery charging?

Answer 3

28V

Question 4

Maximum eng. gen load?

Answer 4

300Amps

Question 5

Maximum engine gen load above 35,000ft?

Answer 5

275Amps

Question 6

Max APU gen load?

Answer 6

275 Amps

Question 7

What Items are on the HOT Battery Bus?

Answer 7

LAV service
Entry Lights (Auto Off in 10 minutes)
Tail Cone Lighting
APU Oil Panel
Baggage Lights
Pylon Work Lights
NWS Accumulator Bleed
ELT Panel

Question 8

How long can the standby battery provide power?

Answer 8

180 minutes

Question 9

One battery can power __________ on it’s respective side for _____ Minutes. It can last for _____ Minutes with load shedding.

Answer 9

Everything; 20 Minutes

60 min; load shed

Question 10

The bus tire will be in auto when?

Answer 10

On the ground

Question 11

What does a cyan BUS TIE CLSD mean?

Answer 11

Only one primary power source is online.

Question 12

What is the maximum battery temperature before getting a CAS message?

Answer 12

63 Degrees C

Question 13

What is the time limit for over current on a generator after engine start?

Answer 13

2 minutes

Question 14

What can be expected if the BATTERY O’TEMP (RED) CAS is displayed and the affected battery is placed in the OFF position with the generators online?

Answer 14

Battery is isolated but all main DC powered items operated normally.

Question 15

A generator current greater than the maximum flight limitation is noted, is this permissible?

Answer 15

Yes, provided no CAS is displayed