When the three identical star-connected coils are supplied with 435 V, 50 Hz, 3- φ supply, the 1- φ wattmeter whose current coil is connected in line R and pressure coil across the phase R and neutral reads 4 kW and the ammeter connected in R-phase reads 24 Amp. Assuming RYB phase sequence find: (i) the power factor, of the load , (ii) resistance and reactance of the coil (iii) reactive power of 3- φ load and (iv) Apparent Power 1-Power Factor, of the Load? 2- Reactance? 3- Resistance? 4- Reactive Power? 5- Apparent Power? A 405 volts, 3phase AC motor has a power output of 12 HP and operates at a power factor of 0.9 lagging and with an efficiency of 91 %. If the motor is star connected, determine the reading on each of the two wattmeter connected to measure the input.? a? b? Three identical capacitors of 20 micro farad are connected in star across a 435 volts, 50Hz, 3-phase supply. What value of capacitance must be connected in delta to take the same line current and line voltage? 1- Phase current in star? 2- Phase current in delta? 3- Value of Xc in delta? 4- Capacitance in delta?
When the three identical star-connected coils are supplied with 435 V, 50 Hz, 3- φ supply, the 1- φ wattmeter whose current coil is connected in line R and pressure coil across the phase R and neutral reads 4 kW and the ammeter connected in R-phase reads 24 Amp. Assuming RYB phase sequence find: (i) the power factor, of the load , (ii) resistance and reactance of the coil (iii) reactive power of 3- φ load and (iv) Apparent Power
1-Power Factor, of the Load?
2- Reactance?
3- Resistance?
4- Reactive Power?
5- Apparent Power?
A 405 volts, 3phase AC motor has a power output of 12 HP and operates at a power factor of 0.9 lagging and with an efficiency of 91 %. If the motor is star connected, determine the reading on each of the two wattmeter connected to measure the input.?
a?
b?
Three identical capacitors of 20 micro farad are connected in star across a 435 volts, 50Hz, 3-phase supply. What value of capacitance must be connected in delta to take the same line current and line voltage?
1- Phase current in star?
2- Phase current in delta?
3- Value of Xc in delta?
4- Capacitance in delta?
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