correcting the power factor: a. maximizes b. minimizes c. does not change line loss between the...
Ordinary Least Squares: a. Maximizes R^2 b. Maximizes SSR c. Estimates the regression line with the minimum variance d. Minimizes SSE e. All of the above
1) The power factor correction impedance is placed in parallel with the load. Can it be installed in series? Justify your answer. 2) What happens to the power supplied by the source before and after power factor correction? Why, in the absence of power factor correction, does the source need to deliver more power to the circuit to maintain the voltage at the load? Justify your answer in terms of reactive power, and line losses.
The per-phase impedance of a short transmission line is (0.3+j0.4) Ω. The sending end line-to-line voltage is 3300V, and the load at the receiving end is 300 kiloWatts per phase at 0.8 power factor lagging. Calculate: (a) The receiving end voltage (b) The line current (c) The sending end power factor (d) The power loss.
3- Two balanced Y-connected loads in parallel, one drawing 25 kW at 0.6 power factor lagging and the other drawing 15 kVA at 0.8 power factor leading, are supplied by a balanced, three-phase, 480-volt source. (a) Draw the power triangle for each load and for the combined load. (b) Determine the power factor of the combined load and state whether lagging or leading. (c) Determine the magnitude of the line current from the source. (d) ∆- connected capacitors are now...
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...
Two loads, A and B, are connected in parallel
across a 1-kV-rms 60-Hz line, as shown in (Figure 1). Load
Aconsumes 10 kW with a 60 percent lagging power factor.
Load B has an apparent power of 20 kVA with an 80 percent
lagging power factor.
a) Find the power delivered by the source.
b) Find the reactive power delivered by the source.
c) Find the apparent power delivered by the source.
d) What is the power factor seen by...
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
b) the r.m.s.value of the supply current c) the r.m.s.value of the current, and d) the resultant power factor of the circuit 17 ELE2601/101/3/2018 4.2 A balanced three-phase load is connected to a three- phase, 380-V supply. The load takes 7,5 kW at a power factor of 0,8 lagging. Calculate the resistance and reactance of each phase if the load is star-connected. 4.3 A three-phase cable supplies power to a balanced three- phase load. Each conductor carries a current of...
Please show steps for part a and b,
Task A2 Review of power system operation Ti Line 1 220 kv T3 Line 2 6 110 kV Load Fig. 1 One-line diagram of a 3-phase power system Consider the power system shown in Fig. 1, where "G" is generator, ,T1, T2, T3, Τ4m are ransformers-M induction motor and "Load" is a load. Let the total generated power be Pgen, the total system load (i.e. the combined power of the induction motor...
From the Given Circuit Bellow, Find:
a. line voltage
b. line current
c. total complex power, average power, and reactive power at the
source
(bottom part of the circuit looks fuzzy it has a clear view at
pic3, they are the same circuit)
3. From the Given Circuit Bellow, Find: a. Line Voltage b. Line Current c. Total Complex power, Average power and Reactive Power at the Source d. Total Complex power, Average power and Reactive Power at the Load...