Solve ITEM 3 only. Must have complete GIVEN and STEP-BY-STEP SOLUTIONS. ITEM 1a. A 220-V long shunt compound motor ha an armature resistance of 0.54-92 and a series field resistanceof 0.12-02. What is the counter EMF if the armature current is 15 amperes.• 220 volts• 230 voltsb. Three single phase, 10 kVA transformer connected delta-delta supply a balanced 3-phase wye-connected load of 26kVA. One transformer is removed for repair. Find the kVA load of each remainingtransformer.•35• 15●c. Three 150-ohm resistors are connected in wye across 480 Volts, 3-phase source. If one of the resistorsis open, what is the power absorbed by the remaining resistors?768 W1,536 W.•a.210 volts• 205 volts● x 10^-3 ohm●ITEM 2a. A current is given by this equation I = 2t^3+ t^2 + 3, a capacitor has an initial charge of 6.83 coulomb.What should be the charge of the capacitor after 5 sec?375.8362.4●●2530b. A 0-10 ampere ammeter has an internal resistance of 0.01 ohm. What shunt resistance to the ammetermust be connected to have a reading of 0 - 100?1.11 x 10^-3 ohm1600 RPM1225 RPM• 2,304W• 1,152 Wc. A 0-10 ampere ammeter has an internal resistance of 0.01 ohm. What shunt resistance to the ammetermust be connected to have a reading of 0 - 100?. 1.11 ohm10ohm385.7369.1ohm. 0.111 ohmITEM 3A 220 volts series motor when running at 800-RPM draws a current of 100 amperes. The combinedresistance of the armature and series field is 0.1-2. What is the speed when the motor develops ½ of theoriginal torque?. ohm● 0.111 ohm• 1147 RPM• 1690 RPM●b. A 3-phase 150 hp, 60 Hz, 460 volts, 6 pole induction motor has a full load torque of 679 lb-ft. What isthe full load slip?● 4%• 2.8%1.5%3%c. A diversity factor of 2.5 gives a savings of percent in the generating equipment.• 76• 40• 26• 60

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ITEM 3 a. A 220 volts series motor when running at 800-RPM draws a current of 100 amperes. The combined resistance of the armature and series field is 0.1-2. What is the speed when the motor develops ½ of the original torque? 1600 RPM 1225 RPM • 1147 RPM • 1690 RPM b. A 3-phase 150 hp, 60 Hz, 460 volts, 6 pole induction motor has a full load torque of 679 lb-ft. What is the full load slip? 4% 2.8% c. A diversity factor of 2.5 gives a savings of percent in the generating equipment. 76 40 • 26 60 • 1.5% 3% •

ITEM 3 a. A 220 volts series motor when running at 800-RPM draws a current of 100 amperes. The combined resistance of the armature and series field is 0.1-2. What is the speed when the motor develops ½ of the original torque? 1600 RPM 1225 RPM • 1147 RPM • 1690 RPM b. A 3-phase 150 hp, 60 Hz, 460 volts, 6 pole induction motor has a full load torque of 679 lb-ft. What is the full load slip? 4% 2.8% c. A diversity factor of 2.5 gives a savings of percent in the generating equipment. 76 40 • 26 60 • 1.5% 3% •

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter34: Motor Installation

Section: Chapter Questions

Problem 6PP: A 350-HP squirrel-cage induction motor is connected to a 480-volts three-phase feeder. The nameplate...

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