A transformer has a rated power output P of 400 kW at a power factor of 0.8. Calculate the rated apparent power out...
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...
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...
A 2000 kW turbine –generator of 0.85 power factor operates at the rated load. An additional load of 300kW at 0.8 power factor is added. Determine the required kVAR of capacitor to operate the turbine generator but keep it from being overloaded.
Exercise 8.02 Calculate the apparent power, the reactive power, the true power and the power factor in the circuit below. Given: v=120sin(377t + /9) (V) i = 36.0 sin(377t) (A) ZZO
if a 480 v supply delivers 50 A with a power factor of 0.8 find the real power, reactive power, apparent power draw the power triangle
A single phase 60 Hz two-winding power transformer is rated at 2400V/480V and 150 kVA. If an autotransformer is built from this conventional transformer to supply a load at 2880V with supply voltage 2400V. Draw the autotransformer and calculate the voltage, current and apparent power rating of the auto transformer. Also calculate the apparent power rating advantage of autotransformer over conventional transformer.
Consider the three-phase circuit below. Calculate the total active power, apparent power, S and the power factor, PF points) a reactive power o. 480V ->/V2 W 302 12/A Active power: Reactive power: Apparent power: Power factor: VAR VA % - - 3 332 neutral Also draw a phasor diagram with is, ic and iz
A 100-kVA synchronous generator has a total loss of 5.5 kW when it delivers rated kVA at a power factor of 0.8. Calculate the percent efficiency
A single phase 60 Hz two-winding power transformer is rated at 2400V/240V and 100 kVA with Zeq = 0.5 + j0.8 Ohm. If an autotransformer is built from this conventional transformer to supply a load at 2640V with supply voltage 2400V. Draw the autotransformer and calculate Zeq, the voltage, current and apparent power rating of the auto transformer. Also calculate the apparent power rating advantage of autotransformer over conventional transformer.
Problem 5: A single phase 60 Hz two-winding power transformer is rated at 2400V/480V and 150 kVA. If an autotransformer is built from this conventional transformer to supply a load at 2880V with supply voltage 2400V. Draw the autotransformer and calculate the voltage, current and apparent power rating of the auto transformer. Also calculate the apparent power rating advantage of autotransformer over conventional transformer.