PHEP 31 transmission line And lighting protection

Question 1

Transmission lines are used for the purpose of

Answer 1

All three

Question 2

In discussion related characteristics of transmission lines it can be said that the higher the voltage

Answer 2

The lower the l2R losses

Question 3

Electrostatic and an electricmagnetic unbalanced between phase and a three phase transmission line is reduced by

Answer 3

Transposing or rotating the conductor

Question 4

The energy stored in the magnetic field of a conductor is

Answer 4

Called weightless energy

Question 5

This steel cordis ACSR conductors does not

Answer 5

Carry any appreciable amount of load current

Question 6

Suspension type insulator

Answer 6

All three

Question 7

Transmission lines losses, due to corona, may be reduced by by all of the above below, except

Answer 7

Increasing voltage values

Question 8

Bundled conductors

Answer 8

Reduce inductive reactance

Question 9

an electrical transmission system may cost to drop out step or become unstable by

Answer 9

All three

Question 10

Switching preform under short circuit conditions is a PT to be most desirable to transmission lines when

Answer 10

Done on the low voltage-side

Question 11

The voltage induced in the lead sheath of underground cables may be eliminated by

Answer 11

All Three

Question 12

A materials such as Thyrite would be most likely used in

Answer 12

A valve type lighting, arrestor

Question 13

All of the below are considered an advantage in the transmission of HVDC as compared to AC except for

Answer 13

The overall isolation requirements may be based on the peak rather than the actual voltage

Question 14

HVDC TRANSMISSION line

Answer 14

Cannot be protected from fault by using conventional circuit breakers

Question 15

In HVDC transmission system

Answer 15

The quantity and direction of power flow may be controlled with high accuracy and extreme rapidity