Distribution & Electrical Motors Flashcards
in the event of an AC generator fault, on a twin engine aircraft, the protection device will open?
The exciter control relay and the generator breaker.
The measured output power components of a constant frequency AC system are?
kVA and kVAR.
A bus bar is?
A distribution means for electrical power.
To reverse the direction of rotation of a shunt-wound DC electric motor, it is necessary to?
Reverse the polarity of either the stator or the rotor.
A modern computer makes use of different internal buses to?
Transfer address, data and control signals.
What is “load shedding”?
The process of reducing electrical load during high-demand situations.
AC generators operated in parallel must have the same?
Voltage and phase.
When the engine fire shut-off handle is pulled, what is the effect on the AC generator?
The exciter control relay and the generator breaker open
In order that DC generators will achieve equal load sharing when operating in parallel, it is necessary to ensure that?
Their voltages are almost equal.
Assuming that the APU is unserviceable, after a failure of both AC generators, a RAT (Ram Air Turbine), if fitted, will be able to provide power for
Essential AC services.
When the AC generators are connected in parallel, the reactive loads are balanced by means of the?
Excitation current
The so called “hot buses” or “direct buses” are directly connected to the?
Battery
