PHEP Ch 31: Transmission Lines, Switch RAck, and Lighting Protection Flashcards
Transmission lines are used for the purpose of…
All of the above
In discussion related characteristics of transmission lines, it can be said that the higher the voltage…
the lower the IR^2 losses
Electrostatic and an electromagnetic unbalanced between phase and a three phase transmission line is reduced by…
Transposing or rotating the conductor
The energy stored in the magnetic field of a conductor is…
Called weightless energy
This steel cordis ACSR conductros does not
carry any appreciable amount of load current
Suspension type inuslator
All of the above
Transmissions line losses, due to corona, may be reduced by all of the below except
Increasing voltage values
Bundled conductors
Reduce inductive reactance
An electrical transmission system may cost to drop out step or become unstable by
All of the above
Switching preform under short circuit conditions is a PT to be most desireable to transmission lines when
Done on the low voltage-side
The voltage induced in the lead sheath of underground cables may be eliminated by…
All three
A materials such as Thyrite would be most likely in
a valve type lighting arrestor
All of the below are considered an advantage in the transmission of HVDC as compared to AC except for
The overall isolation requirements may be based on the peak rather than the actual voltage
HVDC transmission lines
cannot be protected from faults by using conventional circuit breakers
In HVDC transmission systems…
The quantity and direction of power flow may be controlled with high accuracy and extreme rapidity.
