Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 37, Problem 4SQ
To determine
Choose the correct option that would not cause the following problem: when the tank is overflowing, the wound rotor motor has not started and the alarm has not sounded.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Choose the right answer.
1. The basic elements in any power system are
2. The reactors have the following problems
3. If a fault occurred between phases (A, B, and C) simultaneously the fault is called
if the fault occurred on phase (A) only or phases (A, B), it may take the following types
and
......
where
or
4. The symmetrical component method is
5. Conditions for succesful operation of a power system are
6. The reason we use the numerical methods in load flow analysis is
7. The main diagonal of Y-bus
numbers by a factor / not any)
8. The properties of the fault currents
and
(changes the signs / keeps the signs / multiplies the
.... .... .......
re
is the simplest surge diverter among the options
O a. Expulsion type
O b. Rod Gap
O C. Non Linear Resistor type
O d. Valve type
In an On-Off AC Voltage controller, the ON time is
50 cycles and duty cycle is 0.25. The OFF time
cycles will be
O a. 150
O b. 75
O c. 25
O d. 50
Chapter 37 Solutions
Electric Motor Control
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Choose correctly answer?arrow_forward#11arrow_forward23.a. Which one of the following devices can be used to accurately and conveniently measure the speed of amotor with a small slip?A. TachometerB. Revolution counter and stop watchC. Incandescent lamp and colored diskD. Stroboscope23.b. Core loss can be described asA. due to hysteresis and eddy currents in the iron parts.B. directly dependent on the load.C. caused by insufficient ventilation in the machine.D. due to eddy currents in the windings.arrow_forward
- An alternator has been dismantled and the rotor slip rings are blackened with carbon deposits. Technician A says clean them with a soft cloth and alcohol. Technician B says the rotor must be replaced. Who is right? 1. A only. 2. B only. 3. Both A and B. 4. Neither A nor B.arrow_forwardA load connected between the terminals started drawing 3A current and terminal voltage dropped to 95% of its no-load value. Draw the equivalent circuit and calculate: (i) Armature current (ii) Induced voltagearrow_forward4. In Figure 12 of your study unit, the contact SA1 in the electric furnace control closes A. whenever the 24-V transformer is energized. B. when the load limit switch (LS 1) operates. C. immediately when the thermostat calls for heat. D. when the heater coil sequencer (HTRSEQ1) operates.arrow_forward
- 11 Which of the following machine will have the field winding with low value of resistance. a. Transformer b. DC Shunt Generator c. DC Series Motor d. DC Shunt Motorarrow_forward3. What is the frequency of the alternating voltage generated in the armature conductors of a) 6 pole, 900 rpm machine? B) 8 pole, 750 rpm machine? C) 10 pole, 500 rpm machine?arrow_forwardPlease help me with these MCQ 1. stator windings are connected in _____ types 2. Circuit resistance is checked by connecting a(n) ______ to the positive battery terminal and the output, or battery terminal of the AC regenerator. 3. Slip rings and brushes A: Mount on the rotor shaft B: Conduct current to the rotor field coils C: Are insulated from each other and the rotor shaft D: All of the abovearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning