Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 23, Problem 3SQ
What will happen if the start and jog push buttons of the circuit shown in Figure 23–4 are pushed at the same time?
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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.
Explain by drawing how intermediate switch is working in ON and OFF position.
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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
- In Figure 236, what will happen if both jog push buttons are pushed momentarily?arrow_forwardIn Part (A) of Figure 233, what will happen if both the run and jog push buttons are closed?arrow_forwardWhich of the following steps is missing in the open-loop control system sensing the state of the system thinking about what to do to the system doing something to affect the system timing the systemarrow_forward
- At standstill condition, the back emf is zero, so the motor can be safely turned ON without a starter. Select one: O True O False?arrow_forwardSelect the best answer for each of the following. When the reset button does not reestablish the control circuit after an overload, the probable cause is a. the overload heater is too small. b. the overload trip has not cooled sufficiently. c. the auxiliary contacts are defective. d. the overload heater is burned out.arrow_forwardWhat would be the ground fault/ short circuit protection using an inverse time circuit breaker for 240 volt 5 hp motor with 75 temperature? a. 40amps b. 50 amps c. 60 amps d. 70 ampsarrow_forward
- How is a relay manually operatedarrow_forwardAt standstill condition, the back emf is zero, so the motor can be safely turned ON without a starter. Select one: OTrue O Falsearrow_forwardExplain 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_forward
- Why is the Limit Switch important?arrow_forwardPower System: Please explain brieflyarrow_forwardRequired information A fan is to run only when all of the following conditions are met: • Input A is OFF. • Input B is ON or input C is ON, or both B and Care ON. • Inputs D and E are both ON. . One or more of inputs F, G, or H are ON. Saved Note: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Identify the correct typical PLC ladder logic diagram for the given control system. Multiple Choicearrow_forward
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