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Flashcards in DC Power Deck (8)
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1

What is the purpose of the main battery?

To provide power to the starter generator for engine starting and to support essential busbars.

2

Where is the main battery located?

In the rear of the cabin.

3

What is contained within the Power Distribution Unit (PDU)?

All direct current contactors associated with DC generation and engine starting with exception of those specifically for batteries.

4

At which temperature is the battery hot caption triggered?

71 degrees.

5

What does the GCU look after during starting?

Field weakening
Cross start current limit
Start contactor control.

6

If the voltage on the essential services busbar is less than 10V what caption would you get?

ESSBUS#

7

At what Ng will Starter gen operate as a Generator?

50% Ng

8

What is the purpose of the overvoltage sensing relay?

It inhibits the connection of external power if its volume exceeds a nominal 32.5V