Switch Gear The pick-up current of a relay is 7.5 A and the fault current in relay is 30 A. Its plug-setting multiplier (P.S.M.) is 6 8 2 4 6 8 2 4 ANSWER DOWNLOAD EXAMIANS APP
Switch Gear To limit short-circuit current in a power system are used reactors earth wires H.R. fuses isolators reactors earth wires H.R. fuses isolators ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Relay can be designed to respond to changes in temperature resistance, reactance and impedance All of these voltage and current temperature resistance, reactance and impedance All of these voltage and current ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The normal current in a power line is 100 A. If a short-circuit fault occurs on the line, then one can expect the short-circuit current to be 300 A more than 1000 A 200 A 100 A 300 A more than 1000 A 200 A 100 A ANSWER DOWNLOAD EXAMIANS APP
Switch Gear The fault that imposes severest duty on the circuit breaker is two lines to ground fault line to line fault line to ground fault all three lines short-circuited two lines to ground fault line to line fault line to ground fault all three lines short-circuited ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Overheating of relay contacts or contact born out is due to too low contact pressure all of these foreign matter on the contact surface slow making and breaking of load circuit contacts too low contact pressure all of these foreign matter on the contact surface slow making and breaking of load circuit contacts ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS