1.) 480/277V PF = 0.68 KW Load = 975 Find P, Q, S, I, PF, Angle...
1.) 480/277V
PF = 0.68
KW Load = 975
Find P, Q, S, I, PF, Angle
2.) Then correct PF to 0.96 and Find P, Q, S, I, PF, Angle
Homework Answers
The infinite bus in the Figure operates at 480 V. Load 1 consumes 100 kW at...
The infinite bus in the Figure operates at 480 V. Load 1 consumes 100 kW at 0.9 Pflagging and load 2 consumes 80 KVA O Plagne load is synchronous motor whose real power consumption is 74.6 kW at 0.8 PF leading (a) If the switch was initially open what is the equivalent power factor of the system (b) When the switch is finally closed, what is the new equivalent power factor of the system Bus 1 Load 1 100 KW...
1.) 208/120V Loads = 300KW PF 1.00 175KW PF 0.7 250KW PF 0.6 300KVA ang 39.12...
1.) 208/120V Loads = 300KW PF 1.00 175KW PF 0.7 250KW PF 0.6 300KVA ang 39.12 degress Find total P, S, Q, PF, I, Angle 2.) Then correct PF to 0.95 and find total P, S, Q, PF, I, Angle
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and Vs=450 V. a) Find...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
1, Two balanced three-phase loads are in parallel. Load 1 draws 10 kW at 0.8 PF...
1, Two balanced three-phase loads are in parallel. Load 1 draws 10 kW at 0.8 PF lagging Load 2 draws 20 kVA at 0.6 PF leading a. b. The loads are supplied by a balanced three-phase 480 Vu source. (a) Draw the power triangle for the combined load. (b) Determine PF of the combined load. (c) Determine the magnitude of the line current from the source. (d) Y-connected inductors are now installed in parallel with the combined load. What value...
Solved: Find Vo in the network in x + /u/0/?tab=rm&ogbl#inbox?projector=1 7. (a) Use source superposition to...
Solved: Find Vo in the network in x + /u/0/?tab=rm&ogbl#inbox?projector=1 7. (a) Use source superposition to find Vo in the following circuit: 12/ov +-120 2/AC) (b) An industrial load consumes 100 kW at 0.707 pflagging. The 60 H line voltage at the load is 480 4V rms. The transmission-line resistance between the power company transformer and the load is 0.1 22. Determine the power savings that could be obtained if the pf is changed to 0.96 logging 0.10 w 480...
480V 1473.07 kW 984.56 kVAR PF = 0.83 Find the kVAR rating and micro farads of...
480V 1473.07 kW 984.56 kVAR PF = 0.83 Find the kVAR rating and micro farads of the capacitor required to correct power factor to 0.96.
1.2 kW 0.8 kVAR (cap) (a) In the circuit shown in Fig. Qla, find: Construct the...
1.2 kW 0.8 kVAR (cap) (a) In the circuit shown in Fig. Qla, find: Construct the power triangles for the loads. (ii) Find the overall complex power consumed in the loads. (iii) Find the current lo. 100/90° v (rms) 2 kVA 0.707 pf leading 4 kW 0.9 pf lagging Fig. Qla (b) [This part has no connection to part (a)] Find the value of the parallel capacitance needed to correct a load of 140 kVAR at 0.85 lagging pf to...
6) 480 V, 0.5 KHz. A -connected. P-pole synchronous generator. This generator has a synchronous reactance...
6) 480 V, 0.5 KHz. A -connected. P-pole synchronous generator. This generator has a synchronous reactance of 0.11 and an armature resistance of 0.015 N. IL = 1310- At full load, the machine supplies 1200 A at 0.8 PF lagging. The phasor diagram of the generator is shown below. E RU 1. = 692.82 -36.87°A Figure 2 i. 11. Calculate the number of poles (P) if the speed of rotation of this generator ise 3000 r/min? [2 marks] If the...
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a...
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a synchronous reactance of 0.6 and negligible armature resistance. Ignore the mechanical and core losses. The magnitude of the internal machine voltage is 480 V when the field current is 4 A. Assume magnetic linearity. Initially, the motor operates at the rated conditions. a) Find the speed of this motor. b) Find the armature and field currents. c) What is the developed torque? What is...
The Pbefore and Pafter value that I got from part a is both 36.2 kW 1...
The Pbefore and Pafter value
that I got from part a is both 36.2 kW
1 Review | Constants Submit Previous Answers A factory has an electrical load of 1600 kW at a lagging power factor of 0.8 and fed from a line having an impedance of 0.05+0.4 12. The voltage at the factory is maintained at 2350 V (rms). An additional variable power factor load is to be added to the factory. The new load will add 320 kW...
The infinite bus in the Figure operates at 480 V. Load 1 consumes 100 kW at 0.9 Pflagging and load 2 consumes 80 KVA O Plagne load is synchronous motor whose real power consumption is 74.6 kW at 0.8 PF leading (a) If the switch was initially open what is the equivalent power factor of the system (b) When the switch is finally closed, what is the new equivalent power factor of the system Bus 1 Load 1 100 KW...
2. The transformer is loaded: 15 KW load, 0.9 lagging PF, and
Vs=450 V.
a) Find the voltage at the high-voltage side of the
transformer (Vp).
b) Find the Voltage Regulation and the Efficiency of this
transformer under this load.
Page 2 of
Problem 3 The equivalent circuit of a 22KVA, 11700/450 V, 60Hz, single phase transformer when referred to its low-voltage side is considered in this problem. The transformer is connected to a load. 0.225+j1.12 's ROXO + Up...
1, Two balanced three-phase loads are in parallel. Load 1 draws 10 kW at 0.8 PF lagging Load 2 draws 20 kVA at 0.6 PF leading a. b. The loads are supplied by a balanced three-phase 480 Vu source. (a) Draw the power triangle for the combined load. (b) Determine PF of the combined load. (c) Determine the magnitude of the line current from the source. (d) Y-connected inductors are now installed in parallel with the combined load. What value...
Solved: Find Vo in the network in x + /u/0/?tab=rm&ogbl#inbox?projector=1 7. (a) Use source superposition to find Vo in the following circuit: 12/ov +-120 2/AC) (b) An industrial load consumes 100 kW at 0.707 pflagging. The 60 H line voltage at the load is 480 4V rms. The transmission-line resistance between the power company transformer and the load is 0.1 22. Determine the power savings that could be obtained if the pf is changed to 0.96 logging 0.10 w 480...
1.2 kW 0.8 kVAR (cap) (a) In the circuit shown in Fig. Qla, find: Construct the power triangles for the loads. (ii) Find the overall complex power consumed in the loads. (iii) Find the current lo. 100/90° v (rms) 2 kVA 0.707 pf leading 4 kW 0.9 pf lagging Fig. Qla (b) [This part has no connection to part (a)] Find the value of the parallel capacitance needed to correct a load of 140 kVAR at 0.85 lagging pf to...
6) 480 V, 0.5 KHz. A -connected. P-pole synchronous generator. This generator has a synchronous reactance of 0.11 and an armature resistance of 0.015 N. IL = 1310- At full load, the machine supplies 1200 A at 0.8 PF lagging. The phasor diagram of the generator is shown below. E RU 1. = 692.82 -36.87°A Figure 2 i. 11. Calculate the number of poles (P) if the speed of rotation of this generator ise 3000 r/min? [2 marks] If the...
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a synchronous reactance of 0.6 and negligible armature resistance. Ignore the mechanical and core losses. The magnitude of the internal machine voltage is 480 V when the field current is 4 A. Assume magnetic linearity. Initially, the motor operates at the rated conditions. a) Find the speed of this motor. b) Find the armature and field currents. c) What is the developed torque? What is...
The Pbefore and Pafter value
that I got from part a is both 36.2 kW
1 Review | Constants Submit Previous Answers A factory has an electrical load of 1600 kW at a lagging power factor of 0.8 and fed from a line having an impedance of 0.05+0.4 12. The voltage at the factory is maintained at 2350 V (rms). An additional variable power factor load is to be added to the factory. The new load will add 320 kW...
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