Power Distribution and External and Auxiliary Power Supplies Flashcards
In most types of aircraft, the output from the generating sources is coupled to one or more low impedance conductors, what are these called?
busbars
perform a “carry-all” function
busbar systems
usually situated in junction boxes or distribution panels located at central points within the aircraft
busbars
provide a convenient means for connecting positive supplies to various consumer circuits
busbar
Categories of consumer services
vital services, essential services, non-essential services
those which would be required after an emergency wheels-up landing
vital services
these services are connected directly to the battery
vital services
required to ensure safe flight in an in-flight emergency situation
essential services
connected to dc and ac busbars and in such a way that they can always be supplied from a generator or from batteries
essential services
those which can be isolated in an in-flight emergency for load shedding purposes, and are connected to dc and ac busbars supplied from a generator
non-essential services
is required for the starting of engines, operation of certain services during “turnaround” servicing periods at airports
electrical power
is required for the testing of electrical systems during routine maintenance checks
electrical power
are restricted to the supply of power under emergency conditions
batteries of an aircraft
provides power for engine starting, ground air conditioning, and other electrical services
Auxiliary Power Unit (APU)
used for supplying power in flight in the event of an engine-driven generator failure and for supplementing the delivery of air to the cabin during take-off and climb
Auxiliary Power Unit (APU)
