A (Ps) means apparent power and B (PqL) means reactive power.
A (Ps) means apparent power and B (PqL) means reactive power. 2. A coil connected across...
A single phase motor draws a current of 30 A from a 240 V, 60 Hz. line. Refer to Problem Description 7.2. A capacitor with a reactance of 31 Ω is then connected in parallel with the motor. A Wattmeter connected to the circuit gives a reading of 5.4 kW. How much reactive power does the capacitor deliver? How much net reactive power remains in the circuit? How much apparent power does the circuit now consume? What is the power...
Question 4 In Figure Q4, a resistance, R is connected in series with an iron-cored choke coil (r in series with L). The circuit draws a current of 5 A at 240 V, 60 Hz. The voltages across the resistance and the coil are 100 V and 200 V respectively. Analyze the circuit to determine the following (a) the resistance, reactance and impedance of the coil, (b) the power absorbed by the coil, and (c) the power factor (pf) of...
a) A coil having resistance of 12 2 and an unknown inductance is connected in series with a 14uF capacitor. The circuit draws maximum current when a voltage of 200 V at 60 Hz is applied. A second capacitor is then connected in parallel to the circuit. i) What should be its value (capacitance), such that the combination acts like a non- inductive resistance, with the same voltage (200V) at 120 Hz? [3.0 marks] ii) Calculate the supply current drawn...
Three microfarad capacitors are connected in wye across a 2300 V, 60 Hz line. Calculate:- a) The line Current. b) The reactive power generated.
PROBLEM 4.3 A coil connects to a 120 volt, 50 hertz alternating voltage source; as it's shown in the following. Obtaining the following readings: Wattmeter reading = 15 watts Ammeter Reading = 7.5 Amps A) Calculate the effective resistance when the coil has a rolled steel core, if it has a power consumption of 20 watts and a current of 6 amps B) Calculate the effective resistance when the coil has a solid cast iron core, and dissipates a power...
An inductance coil draws 3.7 A dc when connected to a 36 V battery. When connected to a 60-Hz 120 V (rms) source, the current drawn is 2.0 A (rms) Determine the resistance of the coil. Determine the inductance of the coil.
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...
Experiment # 8-Prelab Measurement of Single Phase AC Power by Wattmeter 8.1.The measured current in Figure 8.3 is 10 A and the measured power is 900 W. Consider that the wattmeter is ideal (doesn't change the voltage and current through the load) and determine: a) The resistance of the motor coil (R); b) The inductance of the motor coil (L); c) The power factor of the motor coil (cosp) d) The complex power (S); e) The reactive power (Q): f...
The following three-phase, balanced loads are connected across a three-phase, Y-connected 60 Hz source with a line-to-line voltage of 480 V. The loads are described below: • Load 1: ∆-connected, total three-phase apparent power is 30 kVA at 0.95 power factor lagging. • Load 2: ∆-connected, total three-phase active power is 20 kW at 0.7 power factor lagging. • Load 3: Y-connected, phase current is 30 A, and power factor is 0.9 pf leading. (a) Calculate the total complex power...
A balanced A-connected load of Z,=12+39.0 12 is connected to a power supply via a transmission line with impedance of Zrl=0.6+j2.5 12, find Transmission Lines o 20820 V AC 2084(0–240°) v umaza 10 AC 2084(0-120°) v mm | za | Three-Phase 208 V, 60 HZ Power Supply Three-Phase A-Connected Balanced Load @@OGO E the load line and phase voltages (magnitude and angle), the load line and phase currents (magnitude and angle), the total load's real, reactive, and apparent powers, the...