Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 36, Problem 2SQ
Do secondary resistors on starters with three or more steps of acceleration have more or less current inrush than those with two steps of acceleration?
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Chapter 36 Solutions
Electric Motor Control
Ch. 36 - Are the secondary resistors connected in three...Ch. 36 - Do secondary resistors on starters with three or...Ch. 36 - Does reversing the secondary rotor leads mean that...Ch. 36 - If one of the secondary resistor contacts (S2)...Ch. 36 - In Figure 362, how many different interlocking...Ch. 36 - Referring to Figure 364, why is it not possible to...Ch. 36 - Prob. 7SQCh. 36 - If there is a locked rotor in the secondary...Ch. 36 - Why is it necessary to remove the jumpers in...Ch. 36 - Prob. 10SQ
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- Q2: b- Explain how does the three- phase induction motor work? *arrow_forwardSelect the best answer for each of the following. The purpose of overload protection on a motor is to protect the a. motor from sustained overcurrents. b. wire from high currents. c. motor from sustained overvoltage. d. motor from short circuits.arrow_forwardPower System: Please explain brieflyarrow_forward
- Explain the other types of interlocks (aside from using push button contact) that are used in the forward and reversing circuit shown below that prevent the forward and reverse motor starter coils from being energized at the same time. L1 STOP FORWARD REVERSE NO E RINO RE BUZZER F R OL tillk FORWARD REVERSE 98 L2 STOP 95arrow_forwardQuestion 2 of 9 AC motor overloadding causes high current and high temperature, which causes the winding insulation to fail. O Rotor O Stator O Armature O Interpole Flag Reset Previous Next Go to Overviewarrow_forwardChoose the correct answer from the choices. Thanksarrow_forward
- Multiple choices cont.: c. The 3M load contacts are welded shut. d. The normally open 3M contact between wire numbers 23 and 31 is hung closed.arrow_forwardComplete the wiring diagrams as per Worksheets 5-A and 5-B then solve for "A" through "G" for the DC motor on Worksheets 5-A and 5-B when it is running at capacity and its specifications are as follows:Rated input = 125 volts, 16 ampsArmature Resistance = 0.3 ohms(Ω)Shunt Field Resistance = 50 ohms (Ω)Series Field Resistance = 0.6 ohm (Ω)Rheostat Resistance = 12.5 ohm (Ω)A) Voltage drop of armature (IR-arm)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VB) Voltage generated by motor (E-cemf)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VC) power consumed by shynt field(p-shunt)a) 54.68 W, b) 312.5 W, c) 1632.83 W, d) 2000 WD) power consumend by armature resistance( P-arm)a) 54.68 W , b) 312.5 W, c) 1632.83 W , d) 3000 Warrow_forwardComplete the wiring diagrams as per Worksheets 5-A and 5-B then solve for "A" through "G" for the DC motor on Worksheets 5-A and 5-B when it is running at capacity and its specifications are as follows:Rated input = 125 volts, 16 ampsArmature Resistance = 0.3 ohms(Ω)Shunt Field Resistance = 50 ohms (Ω)Series Field Resistance = 0.6 ohm (Ω)Rheostat Resistance = 12.5 ohm (Ω)A) Shunt field current (I-shunt)a) 2.5 A b) 13.5A c) 16 A d) 18.5 AB) Armature current (I-arm)a) 2.5 A b) 13.5A c) 16 A d) 18.5 AC) Voltage drop of shunt field (I-shunt)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VD) Voltage drop of armature (IR-arm)arrow_forward
- Consider a system with four pushbuttons and three lamps and three motors. PB 1 is used for main system ON. PB 4 is used Main OFF. Lamp 1 has to switch ON for the moment PB 2 is pressed. If the PB 2 is pressed for ten times lamp 2 has to ON. Motor 1 has to switch ON for the moment when PB 2 and PB 3 is pressed. If PB 3 is pressed for five times motor 2 has to ON.arrow_forwardHow can you reduce the amount of voltage applied to the motor during inching?arrow_forwardQuestion 8 9 of windings draw heavy current at startup and are switched out of the power circuit by the centrifugal switch. O Interpole O Rotor O Run O Start Flag Reset Previous Next Go to Overviewarrow_forward
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