A single-phase,
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Chapter 2 Solutions
Power System Analysis and Design (MindTap Course List)
- A resistor of 50 ohms, a 200mH inductor, and a 1.5 x 10-4 F capacitor is connected in parallel to a 120-volt, 60 cps source. Calculate: a) the equivalent impedance b) the current in each load c) total current d) the total real, reactive, and apparent powers e) power factor.arrow_forwardA resistance of 16 Ω is connected in series with a pure inductance of 39.9 mH and the circuit is connected to a 100 V, 50 Hz, sinusoidal supply. Calculate the phase angle of the impedance. Give your answer as a number without units to 0 decimal places.arrow_forwardThe impedance of an electrical circuit is (30 − j50) ohms. Determine (a) the resistance, (b) the capacitance, (c) the modulus of the impedance, and (d) the current flowing and its phase angle, when the circuit is connected to a 240V, 50 Hz supply.arrow_forward
- Assertion: In an AC, only capacitor circuit has instantaneous power equal to zero at any instant of time. Reason Phase difference between current function and voltage function is 180°. (1) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (2) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (3) Assertion is true but Reason is false. (4) Both Assertion and Reason are false.arrow_forwardA 3- phase , 50 Hz, 400 motor develops 100 H.P. ( 74.6 kW ), the power factor being 0.75 lagging and efficiency 93%. A bank of capacitors is connected in delta across the supply terminals and power factor raised to 0.95 lagging . Each of the capacitance units is built of 4 similar 100 V capacitors . Determine the capacitance of each capacitor .arrow_forwardA 550-V feeder line supplies an industrial plant consisting of a motor drawing 60 kW at 0.75 pf (inductive), a capacitor with a rating of 20 kVAR, and lighting drawing 10 kW. (a) Calculate the total reactive power and apparent power absorbed by the plant. (b) Determine the overall pf. (c) Find the current in the feeder line.arrow_forward
- A 3-phase, 50Hz, 415V motor develops 100 H.P.(74.6kW), the power factor being 0.85 lagging and efficiency of 95%. A bank of capacitors are connected in delta across the supply terminals and power factor is increased to 0.96 lagging. Each of the capacitance units is build of four similar 100 V capacitors. Determine the capacitance of each capacitor.arrow_forward1/3 h p ,120 v , 60 hz split phase 1 ph I m has the following parameters : R main = 4.5 ohm , Ra = 9.5 ohm , xa= 3.5 ohm , Xm=3.7 ohm Find the appropriate value of the starting capacitance? Draw the starting phasor diagram relating V, I, I main, and I aux. Ans : 176 µFarrow_forwardAn industrial plant is supplied from 400V 50Hz power system. The plant consists of (i) 2x50kW pure resistive heating furnace(ii) 5x25kW induction motor having a lagging power factor of 0.85(iii) A compressor unit drawing 80kW active power and 60kVAr inductive reactive power. Calculate per phase capacitance of delta (∆) connected reactive power compensation system to set the power factor of the industrial power plant to 0.98 leading.arrow_forward
- Please Solve ASPS. A 100 kVA, 2000/400 V, 50 Hz, single phase shell type transformer has sandwitch coils. There are two full HIV coils, one full LV coil and two half LV colls. Calculate the value of leakage reactance referred to HV side if the other data given is, depth of HV coil = 4 cm depth of LV coil = 3.6 cm depth of duct between IIV and LV= 1.6 cm width of winding 12 cm length of mean turns = 150 cm HV winding turns = 200 Also calculate the per unit reactance.arrow_forwardA transmission line of impedance (0.05 + j0.02) pu interconnects the buses of a switchyard and a bulk supply point. The receiving end apparent power is (1.0 + j0.6) pu and sending end voltage, 1/0°pu. Estimate the i. Sending end apparent powerarrow_forwardGiven a mesh connected system with reactive factor of 60 percent and true power of 2,500 kW. Calculate the reactive powerarrow_forward
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