Electrical Engineering Materials, 66713 – Course Outline [ Diploma in Electrical Engineering, BTEB ]

Electrical Engineering Materials – Course Outline [ Diploma in Electrical Engineering, BTEB ]

Course Code : 66713

Marks Distribution: T=2, P=0, C=2

 

Electrical Engineering Materials

OBJECTIVES:

• Develop and understand the concept of conducting materials.
• Develop and understand the concept of insulating materials.
• Develop and understand the concept of semiconducting materials.
• Understand the magnetic materials.
• Understand the transformer oil.
• Understand the optical fiber.

SHORT DESCRIPTION:

Conducting and no conducting materials, conduct materials, high resistive materials, magnetic materials, insulating materials, transformer oil, semiconducting materials, optical fiber.

DETAIL DESCRIPTION:

1. Differentiate the conducting and non-conducting materials.

1.1 Define conducting, non-conducting and semi conducting materials.
1.2 Explain energy band diagram of conducting, non-conducting and semi conducting materials.
1.3 Distinguish between conducting, non-conducting and semi conducting materials.
1.4 List at least five names of each group of materials.

2. Understand the concept of receptivity and mechanical properties of conducting materials.

2.1 Define receptivity of materials. 2.2 Define temperature co-efficient of materials and melting point of solid materials.
2.3 List the factors affecting receptivity of electrical materials.
2.4 Define malleability, conductivity and tensile stress.
2.5 Describe the mechanical properties and receptivity of hard and annealed copper, aluminum, low and high tensile steel.

3. Understand the concept of contact materials.

3.1 Define contact materials.
3.2 Describe the physical and electrical properties of silver, tungsten, carbon and copper.
3.3 Explain the uses of copper, carbon and graphite as materials for brush.
3.4 Compare the advantages of using copper, carbon and graphite as brushes materials.

4. Understand the high resistive materials

4.1 Define the term high resistivity.
4.2 State general properties of nichrome, eureka, manganin, german silver, tungsten and carbon.
4.3 State composition of nichrome, eureka, manganin, german silver and tungsten.
4.4 List uses of high resistive materials.

5. Understand the concepts of fuse materials

5.1 Define fuse, metal and alloys.
5.2 Describe the properties of fuse material.
5.3 List the name of metals and alloys to be used as fuse materials.
5.4 Compare the advantage of using metals and alloys as fuse materials.

6. Understand the magnetic properties of materials.

6.1 Define magnetic materials, soft magnetic materials and hard magnetic materials with examples.
6.2 Classify the magnetic materials as diamagnetic, paramagnetic and ferromagnetic types.
6.3 Describe the composition and properties of soft magnetic materials.
6.5 Describe composition and properties of hard magnetic materials.
6.6 List the use of hard and soft magnetic materials.
6.7 Describe magnetization curve, hysteresis loop and hysteresis loss.

7. Understand the concepts of insulating material.

7.1 Describe insulating materials.
7.2 State the importance of insulating materials.
7.3 State the basic of classifying insulating materials.
7.4 Interpret the classification of insulating materials on the basic of temperature.
7.5 State the criteria for selection of proper insulating materials.

7.6 List the properties of ideal insulating materials.
7.7 State electrical properties of insulating materials.
7.8 Name the normal range for the receptivity of a low grade, medium grade and high grade insulating materials.
7.9 State the effect of temperature on the insulating materials.
7.10 State the factors affecting the electric breakdown strength of insulating materials.
7.11 State the temperature limit for class “C” and class “F” insulating materials.
7.12 Name insulating materials which can withstand temperature higher than 180 degree C. 7.13 State the effect of moisture on the insulating materials.
7.14 Define “Loss angel” with respect to an insulating materials.

8. Understand the characteristics of solid insulating materials.

8.1 Define solid insulating materials.
8.2 List the solid insulating materials.
8.3 List the fibrous type of insulating materials.
8.4 State the properties and application of cotton, varnish, cloth and insulating materials.
8.5 Compare the properties and applications of cotton, varnish, cloth and silk insulating materials.
8.6 State the properties of impregnated paper insulation.
8.7 List the application of impregnated paper insulation materials.
8.8 State the properties of glass and asbestos insulation.
8.9 List the application of glass and asbestos insulation.

8.10 Describe the properties and application of ceramic/porcelain insulating materials.
8.11 List two types of Mica insulating materials.
8.12 State the properties and application of Mica.
8.13 Write down the properties of Poly ISO Butyl (PIB) insulating materials.
8.14 State the properties of cross link Poly Ethylene (XLPE) insulating materials.
8.15 List the application of Poly ISO Butyl and cross Link Poly Ethylene insulating materials.

8.16 Short description and application of Silicon resins and Epoxy resins.
8.17 State the importance of mechanical properties for insulating materials.
8.18 Define gasket.
8.19 Mention the composition, properties and application of gasket. 8.20 Prepare a list of insulating materials used in transformer.

9. Understand the characteristics of Liquid Insulating Materials.

9.1 Define insulating oil.
9.2 State the properties of insulating oil.
9.3 State the physical properties of liquid insulating materials.
9.4 Describe the electrical properties of liquid insulating materials.
9.5 State thermal properties of liquid insulating materials.
9.6 Describe the causes of failure of insulating oil.
9.7 Compare the advantages and disadvantages of liquid insulating materials with the solid insulating materials.
9.8 State the uses of insulating oil in high voltage equipment.

10. Understand Transformer oil and Silica gel.

10.1 Define transformer oil.
10.2 Describe the properties of transformer oil.
10.3 Explain the testing of dielectric strength of transformer oil.
10.5 Discuss the contamination and purification of transformer oil.
10.6 Define silica gel. 10.7 Mention the composition of silica gel.
10.8 Describe the properties of silica gel.
10.9 Discuss the importance of silica gel.

11. Understand the characteristics of gaseous insulating materials.

11.1 Define gaseous insulating materials.
11.2 List the gaseous insulating materials.
11.3 State the characteristics of gaseous insulating materials.
11.4 State the characteristics of SF6 gas.
11.5 List the advantages of SF6 gas.
11.6 State the characteristics of Nitrogen.
11.7 State the characteristics of Hydrogen.
11.8 List the uses of gaseous insulating materials.

12. Understand the semiconducting materials.

12.1 Define semiconductor.
12.2 Classify semiconducting materials.
12.3 Describe the properties of semiconducting materials.
12.4 State the importance of semiconducting materials.
12.5 Identify the physical and electrical properties of semiconductor.
12.6 State the Hall Effect.
12.7 Describe the uses of semiconducting materials.
12.8 Discuss the uses of photo conducting materials.
12.9 Describe Gallium Arsenide materials.
12.10 Describe the properties of Gallium Arsenide materials.
12.11 Describe the uses of Gallium Arsenide materials.

13. Understand the concept of optical fiber.

13.1 Define optical fiber.
13.2 Materials used for commercial optical fiber.
13.3 Describe the construction details of optical fiber.
13.4 Discuss the types of optical fiber.
13.5 Describe the advantages of optical fiber.
13.6 Describe the applications of optical fiber.

REFERENCE BOOKS:

 Engineering Materials by Dakker
 Engineering Materials by Sushil
 Optical Fiber Communications by John M. Senior
 Text Book of Electrical Engineering by Raina, Bhattacharya, Joneja
 Electrical Engineering Materials by N. Alagappan & N.T Kumer

 

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