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A building has a single-phase, 277V service rated at 800A. The power factor is 0.95. Find...
P Flag question Question 12 Not yet answered Points out of 2.00 A building has a...
P Flag question Question 12 Not yet answered Points out of 2.00 A building has a three-phase, 277 volt service. If the total working power is 364kW with a power factor of 0.95, what is the total current? Select one: O a. 720kW b. 800A O c. 384 kW O d. 1385A e. None of these
please answer 13.16 at rated load of unity power factor and rated terminal voltage, determine efficienc...
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected synchronous generator has a resistance 0.5Q/phase and a...
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected
synchronous generator has a resistance 0.5Q/phase and a synchronous
reactance of 5Q/phase. The generator is supplying its rated power
at its rated voltage and at a power factor lagging. The rotational
loss is 2 kW. Calculate:
(a) the power developed,
(b) the power angle,
(c) the voltage regulation, and
(d) the shaft torque.
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected synchronous generator has a resistance 0.50/phase and a synchronous...
A three-phase induction motor delivers 500 hp at an efficiency of 0.91, the operating power factor...
A three-phase induction motor delivers 500 hp at an efficiency of 0.91, the operating power factor being 0.76 lagging. A loaded synchronous motor with a power consumption of 100 kW is connected in parallel with the induction motor. Calculate the necessary kVA and the operating power factor of the synchronous motor if the overall power factor is to be unity. Answer should be 365 kVA, 0.274
A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and...
A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and reactive power absorbed by the load. b) Draw the power triangle. c) Determine the KVAR of a capacitor to be connected across the load to raise the power factor to 0.95.
A 60-Hz single-phase AC power network is shown in the figure below with four different loads. The source voltage ES-320 0. Prior to adding the capacitor load for power factor correction, the source c...
A 60-Hz single-phase AC power network is shown in the figure below with four different loads. The source voltage ES-320 0. Prior to adding the capacitor load for power factor correction, the source current IS-135 30 . Determine the capacitance (in μF) of the capacitive load that will make the power factor unity (pf 1.0) of the system. Enter the one best answer (as a number without the units) from the following choices: Sync 74 % 6 15 kVA 10...
A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power out...
A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power output S and the corresponding reactive power Q
A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power output S and the corresponding reactive power Q
1.6 load not in a three phase system) is rated at 50 KVA with a power...
1.6 load not in a three phase system) is rated at 50 KVA with a power factor of 0.8 lagging. A what is the power factor angle? 1.7. For a balanced three phase system, if the wye connected load has impedance 50+20j, determine the total (a single load, complex power of the load if 120225° V rms (ignore the line impedance). 1.8 An ideal transformer has a tuns ratio (N2/NI) of 6, if the magnitude of the primary port (port...
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase ...
Response: Me neither :/
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase a: 1000 kVA, 0.9 lagging power factor Phase b: 800 kVA, 0.95 lagging power factor Phase c: 1100 kVA, 0.85 lagging power factor a) Compute the initial load currents assuming that 60% of the load is complex power, 25% constant current, and 15% constant impedance. b) Determine the currents at the start of the second iteration if the load voltages...
A commercial building in New Orleans has the following electrical design: Lighting System (Demand Factor =...
A commercial building in New Orleans has the following electrical design: Lighting System (Demand Factor = 0.75): Indoor lighting = 2.75kW 120V single-phase; Outdoor lighting = 3.50kW 120V single-phase Heating System (Demand Factor = 0.70): Electric Furnace - 20,000 btuh 240V single-phase Convenience Power (Demand Factor = 0.45): 65 duplex outlets rated at 1.5A 120V single phase Include 15% spare circuits for future expansion The system has a diversity coefficient of 1.1 Using this information, calculate the gross connected load,...
P Flag question Question 12 Not yet answered Points out of 2.00 A building has a three-phase, 277 volt service. If the total working power is 364kW with a power factor of 0.95, what is the total current? Select one: O a. 720kW b. 800A O c. 384 kW O d. 1385A e. None of these
please answer 13.16
at rated load of unity power factor and rated terminal voltage, determine efficienc including field rheostat loss. Ans. 93.139 13.11 A generator under test is rated at 100 KVA, 3-phase, 60-Hz; 2,400 volts. (a) If driven b a de motor unexcited, the motor output is 1.26 KW. (b) If driven by a de motor, generato on open circuit and excited to generate rated potential, the motor output is 2.5 KW. ( Ifdriven by a de motor, generator...
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected
synchronous generator has a resistance 0.5Q/phase and a synchronous
reactance of 5Q/phase. The generator is supplying its rated power
at its rated voltage and at a power factor lagging. The rotational
loss is 2 kW. Calculate:
(a) the power developed,
(b) the power angle,
(c) the voltage regulation, and
(d) the shaft torque.
A 1500-kVA, 6.6 kV, 50 Hz, 6-pole, three-phase, star-connected synchronous generator has a resistance 0.50/phase and a synchronous...
A 60-Hz single-phase AC power network is shown in the figure below with four different loads. The source voltage ES-320 0. Prior to adding the capacitor load for power factor correction, the source current IS-135 30 . Determine the capacitance (in μF) of the capacitive load that will make the power factor unity (pf 1.0) of the system. Enter the one best answer (as a number without the units) from the following choices: Sync 74 % 6 15 kVA 10...
A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power output S and the corresponding reactive power Q
A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power output S and the corresponding reactive power Q
1.6 load not in a three phase system) is rated at 50 KVA with a power factor of 0.8 lagging. A what is the power factor angle? 1.7. For a balanced three phase system, if the wye connected load has impedance 50+20j, determine the total (a single load, complex power of the load if 120225° V rms (ignore the line impedance). 1.8 An ideal transformer has a tuns ratio (N2/NI) of 6, if the magnitude of the primary port (port...
Response: Me neither :/
3. A 12.47 kV feeder provides service to an unbalanced wye-connected load specified to be: Phase a: 1000 kVA, 0.9 lagging power factor Phase b: 800 kVA, 0.95 lagging power factor Phase c: 1100 kVA, 0.85 lagging power factor a) Compute the initial load currents assuming that 60% of the load is complex power, 25% constant current, and 15% constant impedance. b) Determine the currents at the start of the second iteration if the load voltages...
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