ELECTRICAL
AIRPLANE
OPERATIONS
MANUAL
2-05-15
Page
4
Code
01
MARCH 28, 2002
6 - SHED BUSES SELECTOR KNOB
OVRD - Closes the Shed Buses Contactors, provided the airplane
is on ground and at least one generator is operative.
AUTO - Controls the operation of Shed Buses Contactors according
to the Electrical Distribution Logic.
OFF - Deenergizes the Shed Buses manually regardless of any
other command from the Electrical Distribution Logic.
7 - AVIONICS MASTER BUTTONS
− Connect (pressed) or disconnect (released) the navigation and
communication equipment supplied by the avionics switched
buses.
− A striped bar illuminates inside the button when it is released.
8 - BACKUP BATTERY BUTTON
− Connects (pressed) or disconnects (released) the backup
battery to/from the electrical system.
− A striped bar illuminates inside the button when it is released.
9 - AC POWER BUTTON
− Connects (pressed) or disconnects (released) the inverter
to/from the system.
− A striped bar illuminates inside the button when it is released.
10- BUS TIES SELECTOR KNOB
OVRD - Bus Tie Contactors (BTCs) are kept closed regardless of
Electrical Distribution Logic, provided that no overcurrent is
detected by one of the five GCUs.
AUTO - Controls the operation of the BTCs according to the
Electrical Distribution Logic.
OFF - Opens the BTCs and EIC regardless of any other
command from the Electrical Distribution Logic.
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