A. 11 kV
B. 33 kV
C. 60kV
D. 110kV
A. single phase to ground faults
B. phase to phase faults
C. two phase to ground faults
D. three phase faults
E. any of these
Short-circuit currents are due to_______________? Read More »
Switchgear and Protection A. load flow
B. load flow and short-circuit
C. load flow and stability
D. load flow, short-circuit and stability
E. none of the above
A.C. network analyser is used to solve problems of_______________? Read More »
Switchgear and Protection A. reactors
B. resistors
C. capacitors
D. none of the above
To reduce short circuit fault currents are used_____________? Read More »
Switchgear and Protection A. current
B. voltage
C. impedance
D. all of the above
Induction cup relay is operated due to changes in________________? Read More »
Switchgear and Protection A. tapg
B. load end
C. sending end
D. sending and other end
E. all of the above
A. zero
B. infinity
C. unity
D. none of the above
The reflection co-efficient at the open circuited end of a transmission line___________? Read More »
Switchgear and Protection A. lubricate the contacts
B. insulate the contacts from switch body
C. extinguish the arc
D. all of the above
E. none of the above
A. overload
B. reverse current
C. open-circuits
D. short-circuits
H.R.C. fuses provide best protection against________________? Read More »
Switchgear and Protection A. thermocouple
B. electronic and bimetallic
C. both (A) and (B)
D. none of the above
