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Problem #1: A 25 KW motor with lagging power factor of 0.75 in a manufacturing plant...
An induction motor draws 1.0 kW at 0.8 lagging power factor from a 250 V, 60...
An induction motor draws 1.0 kW at 0.8 lagging power factor from a 250 V, 60 Hz source. [38] (a) What value of capacitance must be placed in parallel with the motor to raise the line power factor to 93% lagging? (b) With the capacitor in service, what are the magnitudes of the motor current, capacitor current, and line current? Solution:
An industrial plant consisting primarily of induction motor loads absorbs 1200kW at 0.65 power factor lagging....
An industrial plant consisting primarily of induction motor loads absorbs 1200kW at 0.65 power factor lagging. Compute the required kVA rating of a shunt capacitor to improve the power factor to 0.95 leading.
A building has an overall power factor of 0.75 lagging. The required power factor is 0.85....
A building has an overall power factor of 0.75 lagging. The required power factor is 0.85. The voltage provided to the building is 480 V at 60 Hz, and the building consumes 29,000 VA of power Find the value of the capacitor (in VARs and Farads) you must connect to the load to increase the required power factor of 0.85.
A single Phase load draws 10 kW from a 410 V line at a power factor...
A single Phase load draws 10 kW from a 410 V line at a power factor of 0.707 lagging. Determine: (a) The rms current (b) The reactive power required by the load (c) We want to correct the power factor to be 0.9 lagging by adding a capacitor, what will be the new reactive power? (d) draw the power triangle with the old and new reactive powers
The power factor at which a three-phase induction motor operates is 0,82 When the intake power...
The power factor at which a three-phase induction motor operates is 0,82 When the intake power is 2100 kW. Capacitor are installed to improve this power factor to 0,97 lagging. A) Calculate the kVA r of this capacitor bank and show all the work done and diagram involved B( during slack periods, the motor draws 1050 kW at a power of 0,75.Determine the overall power factor if capacitor are not removed. Show all work and diagram.
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed an...
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed and terminal voltage and at an output power of 35kW. Neglecting losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Eaf and field current I if the motor is operating at (a) 0.9 power factor lagging (b) unity...
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of...
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed and terminal voltage and at an output power of 35kW. Neglecting losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Eaf and field current I if the motor is operating at (a) 0.9 power factor lagging (b) unity...
Problem 4: A plant consumes 20 kW of power. If the load power factor is 0.9...
Problem 4: A plant consumes 20 kW of power. If the load power factor is 0.9 lagging, what is the angle by which the load current lags the load voltage? What is the load current, I, if the load voltage is 240/10° VrMS? Answers: 25.84,-92.59/-15.849 ARMS
A 220 kW load having 0.8 lagging power factor is supplied from a 600 V (line...
A 220 kW load having 0.8 lagging power factor is supplied from a 600 V (line to line) three-phase supply. A bank of power factor capacitors is delta connected. (a) Draw neat schematic diagram showing the connection of the capacitor bank in Delta connection. (b) Determine the KVAR rating of each individual capacitor needed to bring power factor to 0.9. (c) Determine the capacitance of each capacitor in uF.
An Inductive load 1 phase pulling power 6 kW on power factor 0.85 lagging and voltage...
An Inductive load 1 phase pulling power 6 kW on power factor 0.85 lagging and voltage 230 V. Find : a) Reactive power and Apparent power consumed by the load b) Load impedance c) Draw the triangle power of the load
An induction motor draws 1.0 kW at 0.8 lagging power factor from a 250 V, 60 Hz source. [38] (a) What value of capacitance must be placed in parallel with the motor to raise the line power factor to 93% lagging? (b) With the capacitor in service, what are the magnitudes of the motor current, capacitor current, and line current? Solution:
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed and terminal voltage and at an output power of 35kW. Neglecting losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Eaf and field current I if the motor is operating at (a) 0.9 power factor lagging (b) unity...
Problem 3:A 480 V, 50 kW, 60 Hz, 3-φ synchronous motor has a synchronous reactance of Xs = 4.56 Ω and an armature-to-field mutual inductance, Laf = 150 mH. The motor is operating at rated speed and terminal voltage and at an output power of 35kW. Neglecting losses in the motor, calculate the magnitude and phase angle of the line-to-neutral generated voltage Eaf and field current I if the motor is operating at (a) 0.9 power factor lagging (b) unity...
Problem 4: A plant consumes 20 kW of power. If the load power factor is 0.9 lagging, what is the angle by which the load current lags the load voltage? What is the load current, I, if the load voltage is 240/10° VrMS? Answers: 25.84,-92.59/-15.849 ARMS
A 220 kW load having 0.8 lagging power factor is supplied from a 600 V (line to line) three-phase supply. A bank of power factor capacitors is delta connected. (a) Draw neat schematic diagram showing the connection of the capacitor bank in Delta connection. (b) Determine the KVAR rating of each individual capacitor needed to bring power factor to 0.9. (c) Determine the capacitance of each capacitor in uF.
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