A. Air blast circuit breakers
B. Circuit breaker with SF6 gas
C. Vacuum circuit breakers
D. Oil circuit breakers
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. impedance
B. directional
C. non-directional
D. none of the above
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
E. any of the above
A. 0.003 sec
B. 0.001 sec
C. 0.01 sec
D. 0.10 sec
E. none of the above
A. in series with circuit
B. in parallel with circuit
C. either in series or in parallel with circuit
D. none of the above
A. thermocouple
B. pyrometer
C. resistance thermometer
D. thermometer