ELECTRICAL
AIRPLANE
OPERATIONS
MANUAL
2-05-10
Page
6
Code
01
REVISION 26
CONFIGURATION 3
Loss of all generators:
− When the last generator fails, the operational logic configures
the system to dedicate the batteries to supply the Essential
Buses only (electrical emergency condition). In this
configuration, the Central DC Bus is also powered to allow the
APU to be started.
− BTC 1, BTC 2, BC 1, SBC 1, SBC 2, BBR 1 and BBR 2 are
open.
− EIC, EBC 1, EBC 2 and BC 2 are closed.
NOTE:- This operational mode is activated for in-flight condition only.
- A 1-second time delay is provided to avoid inadvertent
switching to emergency configuration due to electrical
transients.
- If the automatic transfer fails, perform this function
manually by pressing the Essential Power Button.
- While In-flight, the electrical system is automatically reset
if at least one generator is reset and supplying its
associated bus.
- On the ground, the system can be reset by switching both
Battery Selector Knobs from AUTO to OFF and then back
to AUTO.
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