Transmission and distribution

Square conductors

Circular conductors

Rectangular conductors

None of the above

6.6 kV (r.m.s. value)/cm

11 kV (r.m.s. value)/cm

22 kV (maximum value)/cm

30 kV (maximum value)/cm

Stay wire

Earth wire

Structural components

All of the above

Current will flow to earth

Supply voltage will drop

Supply voltage will increase

No current will flow in the conductor

Using a guard ring

Grading the insulator

Using long cross arm

Any of the above

Electromagnetic induction

Varying the resistance

Varying the reactance

Variable transformer

Increase of short-circuit current of the system

Availability of steady voltage at all loads at the line terminals

Possibility of better protection for the line due to possible use of higher terminal reactants

Improvement of power factor at times of moderate and heavy loads E. Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

Circuit breakers

Isolators

Load break switch

Circuit breakers and load break switches

150 to 220 kV

100 to 120 kV

60 to 100 kV

20 to 50 kV

Copper

Aluminium

Steel

Tungsten