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2. A load absorbs a current of 8.5 A lagging at a p.f. of 0.84 from...
Rework problem 3.4 if the load connected to the 240-V secondary winding absorbs 110 kVA under...
Rework problem 3.4 if the load connected to the 240-V secondary winding absorbs 110 kVA under short-term overload conditions at an 0.8 power factor leading and at 230 volts. Reference of problem 3.4 A single phase 100-kVA 2400/240-volt 60 Hz distribution transformer is used as a step down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 60kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary...
Electrical Engineering Question 2. Three loads are connected in parallel across a source as shown. Load...
Electrical Engineering Question
2. Three loads are connected in parallel across a source as shown. Load 1 absorbs 7 kW and 8 KVAR. Load 2 absorbs 10 KVA at a lagging p.f. of 0.6. Load 3 absorbs 10 kW at a leading p.f. of 0.5. a) Find the total complex power absorbed by the three loads. 10.12 b) If V. = 12020° Vrms, find V, in polar form.
Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S =...
Consider the two loads in the
circuit in (Figure 1). Load #1 (L1) absorbs S = 56 VA at a lagging
power factor of pf = 0.61. Load #2 (L2) absorbs P2 = 56 W and Q2 =
1 VAR of power. If these loads are powered by a V = 425 V−rms ,
60-Hz source, what impedance needs to be added to the circuit in
order to raise the source's power factor to unity? Express your
answer in rectangular...
4- - a 3-phase load of 500 MVA ,120 KV at 0.8 p.f lagging find: -...
4- - a 3-phase load of 500 MVA ,120 KV at 0.8 p.f lagging find: - The magnitude of line current I Line – Three-phase (real) power Pload - Phase a |1ine) = ? 30, 500 MVA, 0.8 pf lagging line-to-line Phaseb Phasec
1. A 500kW 0.75 lagging load is supplied from a power source at 20 kV through...
1. A 500kW 0.75 lagging load is supplied from a power source at 20 kV through a transformer (630 kVA, 20/0.4 kV ), a circuit breaker and cables. The length of the line is 5 km. ( electrical conductivity of copper is 56 m/ohm.mm2 ) a. Find the apparent power supplied from the transformer by considering the losses on the line. (10 pts) b. Is there any problem with the system? Explain. (10 pts) c. To improve the load power...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt + 15°) and i(t) = 2 cos(wt – 15°). The reactive power Q in the load is 21. An electrical load absorbs an average power of 8kW at a leading power factor of 0.8. The reactive power in the load is 22. A balanced Y-connected load with an impedance of 104–30°N? per phase is supplied by a balanced A-connected source with Va = 208/30°V...
Q3. from a 240 V, 50 Hz supply as shown in the Figure 3. 24020 Vrms...
Q3. from a 240 V, 50 Hz supply as shown in the Figure 3. 24020 Vrms Inductive load with 0.6 lagging Load current 50 A Ohle Capacitor to be connected for power factor improvement Figure 3: a) Assuming that the capacitor shown in the figure is disconnected, calculate the load real (PL), reactive(Q1), and apparent power(SL) (5 marks) b) Draw the load power triangle and indicate real (P.) reactive (Q.), apparent (SL) power, and power factor angle (@.) (5 marks)...
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs...
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 + j1.6) 12 per phase between generator G1 and the load, and (0.8 + jl) 2 per phase between generator G2 and the load. If generator G1 supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line-to-line, determine: 1. The voltage at the load terminals. 2....
An Inductive load 1 phase pulling power 6 kW on power factor 0.85 lagging and voltage...
An Inductive load 1 phase pulling power 6 kW on power factor 0.85 lagging and voltage 230 V. Find : a) Reactive power and Apparent power consumed by the load b) Load impedance c) Draw the triangle power of the load
I. Two electric loads are connected in parallel to a source of value u(t) = 300...
I. Two electric loads are connected in parallel to a source of value u(t) = 300 cos(380t) V. The first load absorbs 3 kW at a power factor of 0.5 lagging. The second load absorbs 4kW at a power factor of 0.8 leading. (a) Find the current I through the first load. (b) Find the total current I c) Find the total apparent power (d) Find the total average power e) Find the overall power factor of the two loads...
Electrical Engineering Question
2. Three loads are connected in parallel across a source as shown. Load 1 absorbs 7 kW and 8 KVAR. Load 2 absorbs 10 KVA at a lagging p.f. of 0.6. Load 3 absorbs 10 kW at a leading p.f. of 0.5. a) Find the total complex power absorbed by the three loads. 10.12 b) If V. = 12020° Vrms, find V, in polar form.
Consider the two loads in the
circuit in (Figure 1). Load #1 (L1) absorbs S = 56 VA at a lagging
power factor of pf = 0.61. Load #2 (L2) absorbs P2 = 56 W and Q2 =
1 VAR of power. If these loads are powered by a V = 425 V−rms ,
60-Hz source, what impedance needs to be added to the circuit in
order to raise the source's power factor to unity? Express your
answer in rectangular...
4- - a 3-phase load of 500 MVA ,120 KV at 0.8 p.f lagging find: - The magnitude of line current I Line – Three-phase (real) power Pload - Phase a |1ine) = ? 30, 500 MVA, 0.8 pf lagging line-to-line Phaseb Phasec
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt + 15°) and i(t) = 2 cos(wt – 15°). The reactive power Q in the load is 21. An electrical load absorbs an average power of 8kW at a leading power factor of 0.8. The reactive power in the load is 22. A balanced Y-connected load with an impedance of 104–30°N? per phase is supplied by a balanced A-connected source with Va = 208/30°V...
Q3. from a 240 V, 50 Hz supply as shown in the Figure 3. 24020 Vrms Inductive load with 0.6 lagging Load current 50 A Ohle Capacitor to be connected for power factor improvement Figure 3: a) Assuming that the capacitor shown in the figure is disconnected, calculate the load real (PL), reactive(Q1), and apparent power(SL) (5 marks) b) Draw the load power triangle and indicate real (P.) reactive (Q.), apparent (SL) power, and power factor angle (@.) (5 marks)...
Problem 3. Two three-phase generators supply a three-phase load through separate three-phase lines. The load absorbs 30 kW at 0.8 power factor lagging. The line impedance is (1.4 + j1.6) 12 per phase between generator G1 and the load, and (0.8 + jl) 2 per phase between generator G2 and the load. If generator G1 supplies 15 kW at 0.8 power factor lagging, with a terminal voltage of 460 V line-to-line, determine: 1. The voltage at the load terminals. 2....
I. Two electric loads are connected in parallel to a source of value u(t) = 300 cos(380t) V. The first load absorbs 3 kW at a power factor of 0.5 lagging. The second load absorbs 4kW at a power factor of 0.8 leading. (a) Find the current I through the first load. (b) Find the total current I c) Find the total apparent power (d) Find the total average power e) Find the overall power factor of the two loads...
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