Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 48, Problem 8SQ
To determine
Find the alternate methods for stopping the motor which is provided in the circuit in Figure 48-4.
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Chapter 48 Solutions
Electric Motor Control
Ch. 48 - In Figure 482, what is the purpose of normally...Ch. 48 - Can a time-delay relay be used satisfactorily in a...Ch. 48 - Prob. 3SQCh. 48 - Prob. 4SQCh. 48 - Prob. 5SQCh. 48 - What is the purpose of the lockout relay or safety...Ch. 48 - What happens if the reverse push button is closed...Ch. 48 - Prob. 8SQCh. 48 - Prob. 9SQCh. 48 - In Figure 487, is it necessary to push the stop...
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- Q Answer the following questions for the 3-ph induction motor connection below, B/What is the function of the connected power anal yzer. N What is the connection type of the motor coils. CI Connect the wiring below. POWDER BRAKE BRAKE CONTROL 9990arrow_forwardWhy do you think some motor control circuit utilizes single voltage sources for control and power circuit? Explain.arrow_forwardPart 3 Draw the power and control circuit of a forward-reverse starter for a 3-phase motor. Add 4 pilot lights (PL) in the control circuit; red PL for running forward, orange PL for running in reverse, green for not running and yellow for overload.arrow_forward
- Electrical help !!arrow_forwardUsing the following control devices ,draw an electrical circuit that will manage the direction of rotation of the DC motor. With the pushbutton in its normal state, the motor should be rotating in one direction. Actuating the pushbutton should reverse the motor’s direction of rotation.arrow_forwardQ4/ choose the correct answer The back emf in a dc motor is ___________________?. 1-opposes the applied voltage 2- aids the applied voltage 3- opposes the field current 4- aids the armature currentarrow_forward
- Can I use the Manual Motor Starter on a single phase motor? Why?arrow_forwardA 300 HP, 208-Volt, 3 – phase motor is started by the Y – Δ method. If the starting current is 54 A, when rated voltage is applied, what current will flow when the Y – Δ switch is used? (A)30 A (B) 31.2 A (C) 32.4 (D) 33.7arrow_forwardAnswer all or else skip the question pleasearrow_forward
- The NEC is very specific in its requirement that submersible electric water pump motors be grounded. Where is this specific requirement found in the Code? _______________________________________________________________________ _______________________________________________________________________arrow_forwardAt standstill condition, the back emf is zero, so the motor can be safely turned ON without a starter. Select one: OTrue O Falsearrow_forward4.a. The stop control in a three-wire control scheme stops the motor byA. increasing the resistance in the run circuit.B. shorting the starter coil.C. tripping the thermal overloads.D. disrupting current flow to the coil.4.b. An across-the-line starter does not change the speed of a squirrel-cage motor because itA. varies the internal rotor resistance.B. does not vary the line voltage.C. varies the line voltage as the line frequency increases.D. varies the pole connections at each setting.arrow_forward
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