Aircraft Electrical Systems Flashcards
Engine Driven generator
A machine with an engine that creates electricity that powers the different part of the airplane when it is flying
Auxiliary Power unit
Small engine inside the plane (usually in the tail of the plane) that
- Provides electricity when the main engines are off
- Supplies air for air conditioning and helps out main engines
- Gives hydraulic pressure for systems that need it when the main engines are off
Ground power Unit
A service component used to supply electrical power to an aircraft when it is being operated on the ground
- Powers the airplane’s systems without using the airplane’s own engines
- Hence saving fuel and reduces the engine wear
Battery
The battery is used to provide a source of emergency back-up
electrical energy for essential loads
Transformer Rectifier (TR)
A component in a large aircraft electrical system used to reduce the AC voltage and change it into DC voltage for operating DC equipment.
Inverter (INV)
device used to convert DC supply to AC supply in the airplane’s electrical systems
Bus bar
Power distribution point to which a number of circuits may
be connected
Motors
Device used to convert electric energy into mechanical
energy.
Some typical applications of motors are: door actuators,
fuel control valve, and hydraulic pump
Lighting
Light used in different parts of the aircraft.
The principal applications of lights are
-marking of an aircraft’s position,
- forward illumination for landing and taxiing,
- illumination of passenger cabins, cockpit
instruments and control panel.
Engine Starting and Ignition
Electric motors or turbo-starters are used to crank the engine while electrical ignition systems
- Provides the ignition during engine starting
Fire Detection and Extinguishing Systems
Fire protection includes the means a system that both detects and extinguishes the fire.
Pressurisation Systems
Sytems that maintain cabin pressure at higher altitudes in the airplane cabin
- Ensures a comfortable and safe environment for passengers and crew at high altitudes
Oxygen Systems
- Systems that provide oxygen in the airplane cabin
-Compensates for thinner air at higher altitude by either pressurizing the cabin or providing supplemental oxygen
Ice and Rain Protection Systems
- Systems that protect the airplane from ice and rain on the airplane’s exterior surfaces
- Prevents ice formation that can affect the aerodynamics and ensures safe operation during rain and icy conditions
