A. Lightning arresters
B. Relays
C. Step-down transformer
D. Switchgear
A. thermocouple
B. pyrometer
C. resistance thermometer
D. thermometer
A _________ is used to measure the stator % winding temperature of the generator? Read More »
Switchgear and Protection A. split-phase relays
B. reactance relays
C. impedance relays
D. none of the above
Distance relays are generally_____________? Read More »
Switchgear and Protection A. Impedance
B. Reactance
C. Either of the above
D. None of the above
relays are used for phase faults on long line? Read More »
Switchgear and Protection A. Induction type
B. Reactance
C. Impedance
D. None of the above
relay is preferred for phase fault on short transmission line? Read More »
Switchgear and Protection A. above 30 kVA.
B. equal to and above 5 MVA
C. equal to and above 25 MVA
D. none of the above
A. mechanical vibration
B. insulation failure
C. loose connection
D. impulse voltage
The short circuit in any winding of the transformer is the result of_______________? Read More »
Switchgear and Protection A. mechanical vibration
B. insulation failure
C. loose connection
D. impulse voltage
The short circuit in any winding of the transformer is the result of______________? Read More »
Switchgear and Protection A. Air blast circuit breakers
B. Circuit breaker with SF6 gas
C. Vacuum circuit breakers
D. Oil circuit breakers
Which of the following circuit breakers has high reliability and minimum maintenance ? Read More »
Switchgear and Protection A. hydro-electric generators
B. steam turbine generators
C. gas turbine generators
D. all of the above
E. none of the above
Over voltage protection is recommended for______________? Read More »
Switchgear and Protection