A single-phase 480020° V bus is connected to a single-phase 100KW motor operating at alagging power factor of 0.8, a lighting load of 200 kW operating at a unity power factor, andstatic capacitors of 150kvar. Determine the following:(a) The total complex power supplied by the bus to the loads(b) The total current supplied to the bus(c) The power factor of the total load connected to the bus1.4Consider Problem 1.4 and use the bus voltage of 480020° V as the reference phasor. Determinethe following:(a) The phasor current of the lighting load.(b) The phasor current of the motor.(c) The phasor current of the capacitor.(d) The total phasor load current.(e) Draw the phasor diagram of the voltage, all three load currents, and show how the threeload currents combine to become the total load current in terms of phasor addition.1.6

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1.4 A single-phase 480020° V bus is connected to a single-phase 100KW motor operating at a lagging power factor of 0.8, a lighting load of 200KW operating at a unity power factor, and static capacitors of 150kvar. Determine the following: (a) The total complex power supplied by the bus to the loads (b) The total current supplied to the bus (c) The power factor of the total load connected to the bus Consider Problem 1.4 and use the bus voltage of 480020° V as the reference phasor. Determine the following: (a) The phasor current of the lighting load. (b) The phasor current of the motor. (c) The phasor current of the capacitor. (d) The total phasor load current. (e) Draw the phasor diagram of the voltage, all three load currents, and show how the three 1.6 load currents combine to become the total load current in terms of phasor addition

1.4 A single-phase 480020° V bus is connected to a single-phase 100KW motor operating at a lagging power factor of 0.8, a lighting load of 200KW operating at a unity power factor, and static capacitors of 150kvar. Determine the following: (a) The total complex power supplied by the bus to the loads (b) The total current supplied to the bus (c) The power factor of the total load connected to the bus Consider Problem 1.4 and use the bus voltage of 480020° V as the reference phasor. Determine the following: (a) The phasor current of the lighting load. (b) The phasor current of the motor. (c) The phasor current of the capacitor. (d) The total phasor load current. (e) Draw the phasor diagram of the voltage, all three load currents, and show how the three 1.6 load currents combine to become the total load current in terms of phasor addition

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.44P: Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a...

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Two balanced three-phase loads that are connected in parallel are fed by a three-phase line having a series impedance of (0.4j2.7) per phase. One of the loads absorbs 560 kVA at 0.707 power factor lagging, and the other 132 kW at unity power factor. The line-to-line voltage at the load end of the line is 2203V. Compute (a) the line-to-line voltage at the source end of the line. (b) the total real and reactive power losses in the three-phase line, and (c) the total three-phase real and reactive power supplied at the sending end of the line. Check that the total three-phase complex power delivered by the source equals the total three-phase comp lex power absorbed by the line and loads.
For the circuit element of Problem 2.3, calculate (a) the instantaneous power absorbed, (b) the real power (state whether it is delivered or absorbed). (c) the reactive power (state whether delivered or absorbed). (d) the power factor (state whether lagging or leading). [Note: By convention the power factor cos() is positive. If | | is greater than 90, then the reference direction for current may be reversed, resulting in a positive value of cos() ].
A three-phase line, which has an impedance of (2+j4) 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) per phase, and the other is -connected with an impedance of (60j45) per phase. The line is energized at the sending end from a 60-Hz, three-phase, balanced voltage source of 1203V (rms. line-to-line). Determine (a) the current, real power. and reactive power delivered by the sending-end source: (b) the line-to-line voltage at the load: (C) the current per phase in each load: and (d) the total three-phase real and reactive powers absorbed by each load and by the line. Check that the total three- phase complex power delivered by the source equals the total three-phase power absorbed by the line and loads.
Given a 400sq.m single family dwelling unit to be provided with 230V, 1-phase, 2-wire be service, andhaving the following loads: 2-1.5hp A/C, 2-1.0hp A/C, 1-0.5hp water pump, 4-800W water heater, 2-6kWelectric range and 2-1kW microwave oven, determine a) the total connected load, b) the total demand load,c) the overall %demand factor, d) the size of THW feeder conductor, ground wire and IMC conduit, e) therating of feeder overcurrent protection using inverse time circuit breaker
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a) High Voltages are preferred for Transmission of Electricity. Why? b) Why Generation Voltage Levels are low in the range of 11 kV/ 33 kV etc? c) Why ACSR Conductors are preferred over Copper Conductors? d) Overhead Transmission Lines are preferred for Transmission of Power for Long Distances, why? e) Alternating Current is preferred over Direct Current in Power System, Why? f) Write the Installed Generation Capacity of Sultanate of Oman with current energy share of Conventional and Non-Conventional Energy Sources. g) Why the Capacitance effect is neglected in Short Transmission Line. h) Distinguish between Lumped or Distributed elements in a Transmission Line.
a) You have been employed as an electrical engineer by a power transmission company to design a short transmission line to supply power to a light-industrial load consumer with power system specification as follows, a 3-ph, 60Hz overhead short transmission line with a line-to-line voltage of 23KV at the load end, line impedance of 2.48 ±j6.57Ω/phase, the industry has a cumulative consumption of 9MW with a power factor of 0.85 of lagging as a result of several induction motor on its production lines.As part of the regulations for connections to the grid, you are to provide justifications and values to the Energy Commission of Ghana.(i) What would be value of the voltage between the live conductor and the neutral, between live and live voltages at the industrial premises of the factory?(ii) What load angle would expect the factory to be operating at?
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