24-30-00  DC GENERATION Back

A. System Function

The dc generation system gives controlled dc power to the aircraft electrical systems.

B. System Components

The sub-systems of the system are the:

• DC power generation (Ref. 24-31-00)
• DC power control and indication (Ref. 24-32-00)
• Avionics dc power and control (Ref. 24-33-00)
• Standby dc power (Ref. 24-34-00)
• Aircraft batteries (Ref. 24-35-00)

C. System Operation

The system initially uses 24 V dc from the battery busbar and 24 V dc from the standby busbar. It also uses 24 V dc from the external dc power (Ref. 24-40-00)

In the usual mode of operation, the starter/ generator operates independently. The left starter/generator gives 28 V dc to the left Power Distribution Unit (PDU). The right starter/ generator gives 28 V dc to the right PDU.

The PDU give the power supplies to the emergency, the essential and the non-essential busbars.

If there is a failure, one PDU can give power to the other PDU.