Switchgear protections

few turns of thin wire

few turns of thick wire

shunt relays are made of A. few turns of thin wire B. few turns of thick wire C. many turns of thin wire

many turns of thick wire

insulation being overstressed due to over voltages

insulation overstress may lead to failure and subsequent phase to phase faults

being inadequately protected against ground fault

all of the above

tapping

load end

sending end

sending and other end E. all of the above

compensate for line inductive reactance

compensate for line capacitive reactance

improve line voltage

none of the above

impedance

directional

non-directional

none of the above

33kV to 66kV

22kV to 33kV

3.3kV and 11kV

none of the above

thermocouple

pyrometer

resistance thermometer

thermometer

the spring tension

the rate of flux built up

armature core air gap

all of the above

Water

Oil

Air

SF6

fault occurs on the bus itself

fault occurs on neutral line

two or more faults occur simultaneously

fault occurs with respect to earthing