ASSIGNMENT

Assignment

Unit-1

1. Explain the factors to be considered while preparing maintenance schedule

2. Explain preventive maintenance. Give advantages and disadvantages of it.

3. Explain classification of preventive maintenance.

4. List out different activities performed during preventive maintenance.

5. Explain predictive maintenance and give advantage and disadvantage for the

same.

6. List out different activities performed during breakdown maintenance

Assignment

Unit-2

1. Draw and explain different parts of transformer

2. Explain the factors affecting the life of transformer

3. Draw and explain insulation breakdown test of transformer oil.

4. Draw and explain defective devices of transformer.

5. Explain significant maintenance of power transformer

6. Explain important steps of maintenance of power transformer

7. Write the maintenance accessories of the power transformer

8. Write the maintenance schedule of transformer above 1000 KVA

9. Draw and explain filtering process of transformer oil.

10. Which are the possible reasons for failure of distribution transformer?

11. Explain factors of following parameters of transformer

1) Moisture

2) Varnish

3) Slackness of winding

12. Explain the maintenance process of following;

1) Buchholz relay

2) Breather

13. List out various transformer oil with its limiting value

Assignment

Unit-3

1. Explain classification of testing

2. Draw and explain Insulation resistance test of transformer oil.

3. Explain polarization index.

4. Explain voltmeter-ammeter method for measurement of winding resistance

5. Explain Kelvin bridge method for measurement of winding resistance.

6. Draw and explain voltage ratio test.

7. Explain grounding of power transformer

Assignment

Unit-4

1. Explain the various steps in maintenance of circuit breaker.

2. Write the general maintenance procedure steps in low voltage circuit breaker.

3. Write the general maintenance procedure steps in medium voltage Air circuit

breaker.

4. Write the general steps for internal inspection of high voltage circuit breaker.

5. What are the properties of SF6 gas?

6. List the types of tests performed on high voltage A.C. circuit breaker.

7. Explain the maintenance procedure of Oil circuit breaker.

8. Explain the maintenance procedure of air circuit breaker.

9. What are the causes of failure of circuit breaker?

10. Explain the trouble shooting chart for the circuit breaker.