Identify how the direction of rotation of a three-phase motor can be changed.

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Answer 1

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Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

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Answer 2

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Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

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Answer 3

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Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

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Answer 4

Question

100%

Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

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Answer 6

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Answer 7

Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

Answer 8

Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

Answer 9

Chapter 9, Problem 1RQ

To determine

Identify how the direction of rotation of a three-phase motor can be changed.

Answer 10

Expert Solution & Answer

Explanation of Solution

By changing any of the two motor leads, the direction of rotation of any three-phase motor can be reversed. Separate contactor will be required in each direction since the motor is connected to the power line regardless of the operating direction.

As per NEMA standards, the leads 1 and 3 will be changed for reversing and only one overload relay is needed to protect the motor. A reversing controller is one in which two separate contactors and one overload relay are built as one unit.

Answer 11

Expert Solution & Answer

Answer 12

Expert Solution & Answer

Answer 13

Ch. 9 - Prob. 1RQ Ch. 9 - What is interlocking?Ch. 9 - Referring to the schematic shown in Figure 97, how...Ch. 9 - What would be the danger, if any, if the circuit...Ch. 9 - Prob. 5RQ Ch. 9 - Assume that the circuit shown in Figure 97 were to...Ch. 9 - Refer to the circuit shown in Figure 97. Assume...Ch. 9 - Prob. 8RQ

Identify how the direction of rotation of a three-phase motor can be changed.

Concept explainers

Identify how the direction of rotation of a three-phase motor can be changed.

Explanation of Solution

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