A generating station supplies power to the following : (i) a lighting load of 100 kW;...
A generating station supplies power to the following : (i) a lighting load of 100 kW; (ii) an induction motor 800 h.p. (596·8 kW) p.f. 0·8 lagging, efficiency 92%; (iii) a rotary converter giving 150 A at 400 V at an efficiency of 0·95. What must be the power factor of the rotary convertor in order that power factor of the supply station may become unity ?
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A generating station supplies power to the following : (i) a
lighting load of 100 kW;...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE...
THESE ARE QUESTION FROM THE TOPIC POWER FACTOR IMPROVEMENT FROM THE SUBJECT POWER SYSTEM FUNDAMENTALS PLEASE DO THE QUESTIONS STEP BY STEP AND IN NEAT HAND WRITTING THE ANSWERS ARE GIVEN WITH THE QUESTIONS 1) . A 3-phase, 400 V synchronous motor having a power consumption of 50 kW is connected in parallel with an induction motor which takes 200 kW at a power factor of 0·8 lagging. (i) Calculate the current drawn from the mains when the power...
1. (10 points total) A source supplies power to the following three loads connected in parallel:...
1. (10 points total) A source supplies power to the following three loads connected in parallel: (1) a lighting load drawing 10 kW, (2) an induction motor drawing 10 kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp 0.746 kW). (a) Determine the real, reactive, and apparent power delivered by the source. (8 points)
P3- A source supplies power to the following three load connected in parallel: (1) a light...
P3- A source supplies power to the following three load connected in parallel: (1) a light load drawing 20 kW, (2) an induction motor drawing 10 KVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW), Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.
P3- A source supplies power to the following three load connected in parallel: (1) a light...
P3- A source supplies power to the following three load connected in parallel: (1) a light load drawing 20 kW. (2) an induction motor drawing 10 kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW). Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency...
3 phase, 37.3 Kw, 440 V, 50 Hz induction motor operates at full load with efficiency 89% and power factor 0.85 lagging. Calculate: A) The total KVA rating of capacitor required to rise full load power factor to 0.95 lagging. B) What is capacitance per phase if capacitor: 1) Delta connected. 2) Star connected.
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...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At st...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load with an efficiency of 89% and at a power factor of 0.809 lagging. Three identical parallel- connected capacitors are used to raise the power factor to 0.96. 3.1.1 Calculate the kVAr rating of the capacitor bank. (9) 3.1.2 Calculate the capacitance of each capacitor. (6) [15]
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of...
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
Styles AC Bus Local Loads T: OC Bus PV Generating DC/AC Station Zline Local Power Grid...
Styles AC Bus Local Loads T: OC Bus PV Generating DC/AC Station Zline Local Power Grid Inverter T1 T2 Figure Q2 In the microgrid in figure Q2, a solar PV station and the local power grid supply a series of local loads The PV generating station is rated at 2 MW and is operating at unity power factor. The PV station internal impedance is purely resistive equal to 50% based on its own rating of 2 MVA. The inverter DC...
1. (10 points total) A source supplies power to the following three loads connected in parallel: (1) a lighting load drawing 10 kW, (2) an induction motor drawing 10 kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp 0.746 kW). (a) Determine the real, reactive, and apparent power delivered by the source. (8 points)
P3- A source supplies power to the following three load connected in parallel: (1) a light load drawing 20 kW, (2) an induction motor drawing 10 KVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW), Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.
P3- A source supplies power to the following three load connected in parallel: (1) a light load drawing 20 kW. (2) an induction motor drawing 10 kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW). Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.
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...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
QUESTION 3 3.1 A single-phase 39 kW, 380 V, 50Hz induction motor operates on full load with an efficiency of 89% and at a power factor of 0.809 lagging. Three identical parallel- connected capacitors are used to raise the power factor to 0.96. 3.1.1 Calculate the kVAr rating of the capacitor bank. (9) 3.1.2 Calculate the capacitance of each capacitor. (6) [15]
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system supplies a 20 kVA, three-phase induction motor load at a power factor of 0 8 lagging, and a star-connected set of impedances, each having a resistance of 10 Ω and an inductive reactance of 8 Ω Calculate the capacitance of delta-connected capacitors required to improve the overalil power factor to 0 95 lagging [14] TOTAL 1001
QUESTION 6 (MULTI-PHASE SYSTEMS) A 400 v, 50 Hz, three-phase distribution system...
Styles AC Bus Local Loads T: OC Bus PV Generating DC/AC Station Zline Local Power Grid Inverter T1 T2 Figure Q2 In the microgrid in figure Q2, a solar PV station and the local power grid supply a series of local loads The PV generating station is rated at 2 MW and is operating at unity power factor. The PV station internal impedance is purely resistive equal to 50% based on its own rating of 2 MVA. The inverter DC...
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