A 3-phase motor is rated at 100VA 0.9pf lag when operated with 100V 60Hz. The motor must be operated within 95-105V only. There is also an existing 100V 60Hz 3-phase generator set to be tested and verify if it can power the motor. There is a 3-phase connector with 15A rating per line that can be used. Computing for the expected per phase impedance values assuming that the motor is a delta-connected load, what is the per phase impedance of the motor modeling it as a delta-connected load?

A 3-phase motor is rated at 100VA 0.9pf lag when operated with 100V 60Hz. The motor must be operated within 95-105V only. There is also an existing 100V 60Hz 3-phase generator set to be tested and verify if it can power the motor. There is a 3-phase connector with 15A rating per line that can be used. Computing for the expected per phase impedance values assuming that the motor is a delta-connected load, what is the per phase impedance of the motor modeling it as a delta-connected load?

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 2.29MCQ: The total instantaneous power absorbed by a three-phase motor (under balanced steady-state...

See similar textbooks

Similar questions

The total instantaneous power absorbed by a three-phase motor (under balanced steady-state conditions) as well as a balanced three-phase impedance load is (a) A constant (b) A function of time
A 5 kVA single-phase motor operating at 380 Vrms with a power factor of 0.8 in lagging will have a full load operating current of
A three phase synchronous generator with negligible resistance and Xs=20 ohm has induced voltage as well as terminal voltage per phase equal to 230 V. for the load angle of 30o, power received by the bus is .........W.
Define derating, why must a 60Hz generator be derated if it is to be operated at 50Hz? Find percentage of derating done. (4) A generator connected with an infinite bus bar, the frequency indicator shows that frequency is decreasing from 50Hz. What action you will take for restoration of frequency. (2) A generator is loaded with certain load, and its voltage regulation is very poor. What are various ways by which you can improve its regulation? (2)
Three zones of a single-phase circuit are identified in the figure with a generator voltage specification of 240 V. The zones are connected by the transformers T1 and T2, whose ratings are shown below.Using base values of 30 kVA and 240 volts in zone 1, draw the pu circuit and determine the pu impedance and pu source voltage. Then calculate the load current in pu and in amperes.*Round the final answer to four decimal places, polar form, and label it with the correct units.
Sketch the complete per-phase equivalent circuit of a symmetrical non-salient pole three-phase synchronous generator, including the field winding circuit. Your figure should include the synchronous reactance Xs, explain its relation to Xar and Xl. In addition, explain/describe the rest of the different elements of this equivalent circuit.
A manufacturing plant takes 200,000 Watts, at 0.6 power factor. Form a 600 V, 60 Hz, three phase system. It is desired to raise the power factor of the entire system to 0.9 by means of a synchronous motor, which at the same time is to drive a direct current shunt motor generator, requiring that the synchronous motor take 80,000 watts form the line. What should be the rating of the synchronous motor in volts and amperes?
ABB company manufactures three phase, 10 kVA, 240 V, 60Hz, 6 pole wye connected synchronousgenerator. The generator is connected to an infinite bus at rated voltage. The generator has synchronousreactance of 2.0 ohms/phase and negligible stator resistance and is delivering the rated power at 0.9power factor lagging. Determine the following:a. Stator current b. Excitation voltage (per phase and line to line) c. What is the pullout torque (maximum torque) delivered by the generator?
three phase star connected alternator is rated at 1600kVA, 13500V. The armature resistance and synchronous reactance are 1.5 ohm and 30 ohm respectively per phase. Calculate the percentcage regulation for a load of a 1300 kW at leading power factor.
3. Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.8 pf lagging and a synchronous motor drawing 150 kVA at 0.9 pf leading, are supplied by a balanced, three-phase, 4.16-kV source. Line impedances between the source and the load are neglected. a) Determine the power factor of the combined motor-load. b) Determine the magnitude of the line current in each motor c) Determine the magnitude of the line current delivered by the source.
1) A 50 Hz, 3.75 MVA, 3.18 kV, three-phase synchronous generator with rated (nominal) currentof In = 682 A has open- and short-circuit characteristic listed in Table 1 and Table 2 respectively.Determine saturated and unsaturated synchronous reactance in per-unit and in Ohms and calulateshort circuit ratio (SCR). The generator is delivering rated power at 0.95 power factor leading atthe rated therminal voltage. Using given open-circuit characteristic approximately determine thefield current under rated loading.
A 3-phase ,13500V, star connected alternator is rated at 1600kVA. The armature effective resistance and synchronous reactance are 1.5 ohm and 30 ohm respectively per phase. Calculate the percentage regulation for a load of 1280kW at 0.8 power factor lagging