A. merz price percentage differential protection
B. mho and ohm relays
C. horn gaps and temperature relays
D. earth fault and positive sequence relays
A. power
B. current
C. voltage wave
D. all of the above
A. over currents
B. short duty
C. intermittant duty
D. repeated duty
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. few turns of thin wire
B. few turns of thick wire
C. many turns of thin wire
D. many turns of thick wire
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. 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. have low contact resistance
B. be clean and smooth
C. be of sufficient size and proper shape
D. have all above properties
A. short-circuits
B. heavy loads
C. grounds
D. all of the above
A. induction
B. solid state
C. thermal
D. electromagnetic
E. all above