What are the five commonly used starting methods for the motors.

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Answer 1

Question

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

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Answer 2

Question

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

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Answer 3

Question

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

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Answer 4

Question

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

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Answer 5

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

Answer 6

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

Answer 7

Chapter 25, Problem 1SQ

To determine

What are the five commonly used starting methods for the motors.

Answer 8

Expert Solution & Answer

Explanation of Solution

Generally, the polyphase induction motor is a self-starting motor. The commonly used starting methods for a polyphase squirrel cage induction motor are as follows:

1. Full-voltage starting:
An automatic starting or hand-operated switch is connected to the motor directly across the line.
2. Primary-resistance starting:
A resistance unit is connected in series with a stator to reduce the starting current.
3. Autotransformer or compensator starting:
Low voltage starting is applied by performing an automatic or manual switching between the taps of an autotransformer.
4. Impedance starting:
A reactor is connected in series with a motor to reduce the starting voltage.
5. Star-delta starting:
To get the reduced starting voltage, a stator is connected in star connection for starting and delta connection for running condition.

Conclusion:

Thus, the commonly used starting methods for a polyphase squirrel cage induction motor are listed.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

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What are the five commonly used starting methods for the motors.

Concept explainers

What are the five commonly used starting methods for the motors.

Explanation of Solution

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Chapter 25 Solutions