3 phase delta-delta connection
Find the real power absorbed by the load
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A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and...
A single-phase electrical load draws 1000KVA at 0.8 power factor lagging. a) Find the real and reactive power absorbed by the load. b) Draw the power triangle. c) Determine the KVAR of a capacitor to be connected across the load to raise the power factor to 0.95.
Question 9 (26 marks) Figure 1 shows a single phase load (represented by an impedance ZD)...
Question 9 (26 marks) Figure 1 shows a single phase load (represented by an impedance ZD) connected to a single phase 50 Hz supply system represented by an ideal voltage source Vs behind a system impedance Zs Figure 1 (i) If Vs-230 volts, Zs=(0.1tj0.05) ohms and ZDF(4.940.95) ohms find the voltage across the load (13 marks) (ii) If a 121.3 uF compensation capacitor is connected in parallel with the load recalculate the (13 marks) and the real and reactive power...
A three-phase line, which has an impedance of (2 + j4) Ω per phase, feeds two...
A three-phase line, which has an impedance of (2 + j4) Ω per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y- connected with an impedance of (30 + j40) Ω per phase, and the other is delta- connected with an impedance of (60 + j45) Ω per phase. The line is energized at the sending end from a 60-Hz, three phase, balanced voltage source of 120√3 V (rms, line- to-line). Determine...
exc D) Name Problem 1 (40 points) A small single-phase gencrator is connected to a load...
exc D)
Name Problem 1 (40 points) A small single-phase gencrator is connected to a load whose impedance is 25/-15 Q. The generator voltage is 220 V. Determine: A. The resistance and reactance of the load B. The real and reactive power absorbed by the load C. The power factor and whether it is lagging or leading D. The impedance and the real and reactive power in per unit for a base of 220 V & 100 VA 543.
(2) A balanced-delta load consisting of impedances Zdelta = 30 + 20 j is connected...
(2) A balanced-delta load consisting of impedances Zdelta = 30 + 20 j is connected to a 230V three-phase source. The lines connecting the load to the source each have impedance Zline = 1.0 + 1.5 j . Let the base voltage be 230V and the base power be 1 kVA. These base values are for line to line voltage and three phase power. Calculate per unit values of the magnitude of the line currents as well as...
9. A three phase balanced Y connected source is supplying three, three phase loads that are...
9. A three phase balanced Y connected source is supplying three, three phase loads that are connected in parallel. First load is a y connected and has an impedance of 30+j40 ohms. The second load is absorbing a total of 150kVA at 0.5 power factor lagging. The third load is absorbing 150kVA at 0.5 power factor leading. The line to line source rms voltage is 2500V. i Find the load current in each load i) Find the total real and...
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utili...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
Problem 1 A 3-phase, Y/Y system is supplied from a 450 V (line). The load impedance...
Problem 1 A 3-phase, Y/Y system is supplied from a 450 V (line). The load impedance is 6tj 10 Ω/phase. Please do the following a) Draw the single-phase equivalent circuit of phase A b) Find the magnitude of all line and phase currents c) Find the real power delivered to the load d) Find the reactive power delivered to the load e) Find the apparent power delivered to the load f) Find the power factor of the load
Question: A three-phase line has an impedance of 1 + j2 Ω per phase. The line...
Question: A three-phase line has an impedance of 1 + j2 Ω per phase. The line feeds two balanced three-phase loads that are connected in parallel. The first load is Y-connected and has an impedance of 20+j40 Ω per phase. The second load is ∆-connected and has an impedance of 30-j60 Ω per phase. The line-to-line voltage at the load end of the line is 415V. Taking the phase voltage Va as reference, determine: a) The total current per phase...
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a...
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a 3-0, 0.75 p.u. load on the 4160V side of the transformer. The land has leading power factor of 0.0.11 buc by 1 p.u. voltage on the 13.8kV side. The transformer per unit impedance is j0.12 referred to the secondary side. a) Find the load impedance b) Find the input current on the primary side in real units c) Find the input power factor
Question 9 (26 marks) Figure 1 shows a single phase load (represented by an impedance ZD) connected to a single phase 50 Hz supply system represented by an ideal voltage source Vs behind a system impedance Zs Figure 1 (i) If Vs-230 volts, Zs=(0.1tj0.05) ohms and ZDF(4.940.95) ohms find the voltage across the load (13 marks) (ii) If a 121.3 uF compensation capacitor is connected in parallel with the load recalculate the (13 marks) and the real and reactive power...
exc D)
Name Problem 1 (40 points) A small single-phase gencrator is connected to a load whose impedance is 25/-15 Q. The generator voltage is 220 V. Determine: A. The resistance and reactance of the load B. The real and reactive power absorbed by the load C. The power factor and whether it is lagging or leading D. The impedance and the real and reactive power in per unit for a base of 220 V & 100 VA 543.
9. A three phase balanced Y connected source is supplying three, three phase loads that are connected in parallel. First load is a y connected and has an impedance of 30+j40 ohms. The second load is absorbing a total of 150kVA at 0.5 power factor lagging. The third load is absorbing 150kVA at 0.5 power factor leading. The line to line source rms voltage is 2500V. i Find the load current in each load i) Find the total real and...
please show steps. Thank you.
(40%) Problem 2 of 3: An engine-generator set is paralleled with a 13.2 kv, 60 Hz infinite (utility) bus to deliver power to a 2000 kw plant load at 0.866 lagging power factor. The synchronous generator is wye-connected and rated 3750 kva, 13.2 kv, and 0.8 power factor lagging with 1.0 per unit synchronous reactance and negligible armature resistance. 13.2 kVI 60 Hz I infinite bus utility) rated: 3750 kva 0.8 lag load: 2000 kW...
Problem 1 A 3-phase, Y/Y system is supplied from a 450 V (line). The load impedance is 6tj 10 Ω/phase. Please do the following a) Draw the single-phase equivalent circuit of phase A b) Find the magnitude of all line and phase currents c) Find the real power delivered to the load d) Find the reactive power delivered to the load e) Find the apparent power delivered to the load f) Find the power factor of the load
Problem 3: A 3-0, IMVA, 13.8kV/4160V, 60 Hz, transformer with Y-A winding connection is supplying a 3-0, 0.75 p.u. load on the 4160V side of the transformer. The land has leading power factor of 0.0.11 buc by 1 p.u. voltage on the 13.8kV side. The transformer per unit impedance is j0.12 referred to the secondary side. a) Find the load impedance b) Find the input current on the primary side in real units c) Find the input power factor
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