A:19 V10docs.google.com/formsYour answerA DC shunt motor is connected to athree-point starter. What wouldhappen if (i) the starter handle ismoved rapidly from 'off to 'on'position; (ii) the field circuit becomesopen-circuited with the motorrunning at no-load; (iii) the starterhandle is pulled back to stop themotor.Your answerWhy starters are used for DC motors.Your answerالعربيةالإنجليزية•..

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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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Your assumption is that you measure Insulation Resistance [IR] using MeggerTest on an Induction Motor that works on a line voltage of 440 Volts 50 Hz with a measurable test result of 0.5 M Ohm. Question : a. What about your conclusion, is the measurement value still in accordance with the provisions of the Class Recommendation?. b. What are your actions to be able to maintain and maintain the best IR value of electric motors ?
DEGREE: BS ELECTRICAL ENGINEERING COURSE: AC MACHINES Note: Please solve in this way. Given>Missing>Illustration>Solution>FinalAnswer. Please include symbols, units, formulas, step by step solution, please don't cut the solution. Thank you! (#12) A three-phase,6-pole,220-volt,60-cycle wound-rotor induction motor Is tested with the rotor circuit open. With full voltage applied to the stator, and the rotor at standstill, the voltage between slip rings is 150 volts. Determine rotor voltage and frequency at (A) Synchronous speed, and (B) 1250 RPM. [Answer: 0,0,6.25V,2.5 Hz]
i-Justify the following statement: GTO has full control on its operation (ii) What kind of constructional modification (at least 2 points) improves the turn OFF mechanism of GTO?
Given a 25 hp, three-phase, 230-volt, squirrel cage induction motor. The ambient temperature of the place ofinstallation is 40°C. Use TW wires
A 460VAC rated, 60 Hz, 125-Hp Three-phase induction type motor is to be connected for across-the-line starting. The nameplate indicates the motor’s maximum ampere rating, 160A. It has a NEMA code letter B. The ambient temp of the installation place is and TW copper will be used. Short-circuit protection device that will be used is Inverse Time Breaker. Calculate the Thermal Overload Protection.
A 460VAC rated, 60 Hz, 125-Hp Three-phase induction type motor is to be connected for across-the-line starting. The nameplate indicates the motor’s maximum ampere rating, 160A. It has a NEMA code letter B. The ambient temp of the installation place is and TW copper will be used. Short-circuit protection device that will be used is Inverse Time Breaker. Calculate the Conductor size.
DEGREE: BS ELECTRICAL ENGINEERING COURSE: AC MACHINES Note: Please solve in this way. Given>Missing>Illustration>Solution>FinalAnswer. Please include symbols, units, formulas, step by step solution, please don't cut the solution. Thank you! (#13) The name-plate speed of a 25-cycle induction motor is 720 RPM. If the speed at no load is 745 RPM, calculate: (A) the slip, and (B) percent regulation. [ Answer: 4% and 3.4/%, respectively ]
https://www.chegg.com/homework-help/questions-and-answers/subject-hw-3-electrical-machines-q1-dc-motor-va-150-valt-load-speed-ilo-vad-sec-armature-r-q77540171
A 460VAC rated, 60 Hz, 125-Hp Three-phase induction type motor is to be connected for across-the-line starting. The nameplate indicates the motor’s maximum ampere rating, 160A. It has a NEMA code letter B. The ambient temp of the installation place is and TW copper will be used. Short-circuit protection device that will be used is Inverse Time Breaker. Calculate the Motor Starter Size.
The data obtained in the idling test performed on a three-phase star-connected asynchronous motor; It is 1200V, 5500W, 9.5A. The data obtained in the short circuit experiment on the same motor is 250V,It is 14500W and 100A. For the case where the slip of the motor is 5%, create the approximate equivalent circuit of the motor (L type equivalent circuit), draw the equivalent circuit, find the values of the circuit elements and MUST AND MUST write them ON THE EQUIVALENT CIRCUIT. R and X values will be used in circuit elements, not Z.
405 / 5000 Find the slip, the powers converted,air gap, output and efficiency of a motorthree-phase induction in Y of 138.56 V of voltage ofphase, 60 Hz and 50 hp, which is supplied with 35 A at apower factor of 0.85 lagging. The losses are: copper stator, 2.5 kW rotor, 750 W friction and friction, 650 W and from the core, 1850 W, Negligible miscellaneous losses.
Your Answers may be presented through Discussions, Drawings/Figures/Diagrams, Reference to NEC/PEC and Computations What size conductor would be required to supply three motors connected to a 440-volt, 3-phase branch circuit? Motor #1 is a 50-horsepower, code B induction motor; motor #2 is a 40-horsepower, code H induction motor; and motor #3 is a 50-horsepower, code J induction motor

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A DC shunt motor is connected to a three-point starter. What would happen if (i) the starter handle is moved rapidly from 'off to 'on' position; (ii) the field circuit becomes open-circuited with the motor running at no-load; (iii) the starter handle is pulled back to stop the motor. * Your answer