A. heavy loads
B. internal short-circuits
C. external short-circuits
D. all of the above
A. overload
B. short-circuit and overload
C. open circuit, short-circuit and overload
D. none of the above
A. recovery
B. surge
C. operating
D. arc
E. none of the above
A. power
B. current
C. voltage wave
D. all of the above
A. transient state of short-circuit current
B. sub-transient state of short-circuit current
C. steady state of short-circuit current
D. after D.C. component has ceased
A. Lightning arrestors are used before the switchgear
B. Shunt reactors are used as compensation reactors
C. The peak short current is (1.8 xV2) times the A.C. component
D. The MVA at fault is equal to base MVA divided by per unit equivalent fault reactance
A. constant for all distances
B. lower than that of if fault occurs away from the relay
C. higher than that of if fault occurs away from the relay
D. none of the above