15EE53T: Switchgear and Protection Electrical 5th Sem Syllabus for Diploma DTE Karnataka C15 Scheme

Switchgear and Protection detail DTE Kar Diploma syllabus for Electrical And Electronics Engineering (EE), C15 scheme is extracted from DTE Karnataka official website and presented for diploma students. The course code (15EE53T), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other electrical 5th sem syllabus for diploma c15 scheme dte karnataka you can visit Electrical 5th Sem Syllabus for Diploma C15 Scheme DTE Karnataka Subjects. The detail syllabus for switchgear and protection is as follows.

Pre-requisites:

Electrical Machines, Transmission and Distribution, Fundamentals on Analog electronics and Digital electronics

Course Objectives:

To study the principles, concepts of switchgear & protection. To emphasize on various type of relays and circuit breakers

Course Outcomes:

For complete syllabus and results, class timetable and more pls download iStudy Syllabus App. Its a light weight, easy to use, no images, no pdfs platform to make students life easier.

Unit I Fundamentals ofProtection 07hrs

Sources of Fault Power, Illustrate the Phenomena of Short Circuit with the help of a general circuit diagram, Types of faults &Harmful Effects of short circuit current, Symmetrical Faults on Three Phase Systems, Importance of calculation of Short Circuit Current, Define Percentage reactance and Base KVA, Meaning of Reactor, Use of current limiting reactors & their arrangements, List the steps for Symmetrical Fault Calculations, Simple Problems on Symmetrical Fault Calculations.
Causes of over voltages, Lighting phenomena &over voltage due to lightning
Types of lightning arresters and surge absorbers- their Construction and principle of operation.

Unit II Fuse and Circuit Breakers 14hrs

Meaning of Switchgear, Essential features of Switchgear, List different Switchgear equipment used for switching and interruption of current. Differences between Indoor and Outdoor type Switchgear.
Desirable Characteristics of Fuse elements, Types of Fuses, Fuse Element Materials Important Terms: Current Rating of Fuse element, Fusing current, Fusing factor, Prospective current, cut off current , Pre Arcing Time, Arcing Time, Breaking Capacity, Total Operating Time.
HRC fuses -construction, types, working, Merits, Demerits and applications
Arc formation process, methods of arc extinction, working of Circuit Breaker by Trip Circuit Mechanism, Circuit Breaker rating.
Explain the terminologies – Arc-Voltage, arching Time, Pre -Arching Time, Prospective Current, TRV, Recovery Voltage, RRRV, Total Break Time
Circuit breakers-Concept, Classification, Working principle, Construction, Merits, Demerits & Applications of OCB (Plain oil), ACB(Axial blast, cross blast),SF6 (Sulphur Hexa-fluoride)CB, Non Puffer Type, Vacuum CB.
Maintenance Schedule of OCB, ACB, SF6 and VCB Circuit Breakers

Unit III Protective Relays 12hrs

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Unit IV Protection of Alternators and Transformers 08hrs

Protection of Alternators- Abnormalities & Faults
Differential protection, Balanced Earth Fault Protection, Stator Inter Turn Protection Protection of Transformers-Abnormalities & Faults
Protective Systems for Transformers, Buchholz Relay, Earth Fault or Leakage Protection, Combined Leakage and Overload Protection, Circulating Current Scheme for Transformers Protection

Unit V Protection of Feeders and Bus-Bars 05hrs

Feeder Protection- Abnormalities & Faults, Time Graded Over Current Protection, Differential Pilot – Wire Protection, Basic principle of Distance Protection
Bus -Bar Protection- Abnormalities & Faults, Differential Protection of Bus -Bars.

Unit VI Substation and Maintenance 06hrs

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Reference Books:

1. Principles of Power System” by V. K. Mehta, Rohit Mehta S. Chand, 4th reveised edition 2008
2. Power System Protection And Switchgear by Buvanesh A Oza, Nirmalkumar C Nair ,Rases P Mehta and Vijay H Makwana, McGraw HILL Education(India Pvt. Ltd) Newdelhi
3. J.B.Gupta “Switchgear & Protection”, (edition), Katson Publisher,2008
4. MadhavaRao T.S., ‘Power System Protection – Static Relays’, McGraw Hill, New Delhi,2nd Edition, 21st reprinted, 2008.
5. Handbook of Switchgears by BHEL
6. Testing , commissioning , operation and maintenance of electrical equipment by Sunil S Rao ,Khanna Publications

E-Resources:

1. http://www.pdfsdocuments.com/testing-commissioning-operation-maintenance-electrical-equipments.pdf
2. YOUTUBE VEDIOS ON CIRCUIT BREAKERS
3. YOUTUBE VEDIOS ON PROTECTIVE RELAYS
4. NPTEL VEDIOS ON SWITCHGEAR PROTECTION

Course Delivery:

The Course will be delivered through Lectures, Classroom Interaction, Animations, Group Discussion, Exercises and Assignments.

Suggested Student activity:

A student has to prepare a handwritten report on any one of the activity suggested in a blue book or spiral binding form.

1. Identify various faults on the power system other than faults studied in the curriculum
2. Identify various Unsymmetrical faults on the power system other than faults studied in the curriculum
3. Identify the components of different types of circuit breakers used in LV & HV side with their specifications (through visits, video or model).
4. Study of specification of lightning arresters of different manufacturers through Brochures / Literature
5. Study latest types of over/under voltage relays, differential and distance relays using static relays ,microprocessor based and numerical relays
6. Identify various faults in motors, Relays and Circuit Breakers and relevant protection schemes

Model Question Paper:

(CIE)

1. List the Harmful Effects of short circuit current
2. The below figure shows single line diagram of a 3-pase systems. The percentage reactance of each alternator is based on its own capacity. Find the short circuit current that will flow into a complete 3-phase short circuit at F

Follow the figure from pdf.
[OR] A 3-phase, 20MVA, 10KV alternator as internal reactance of 5% and negligible reactance. Find the external reactance per phase to be connected in series with the alternator so that steady current on short circuit does not exceed 8 times the full load current

3. State Merits and Demerits of :
1. OCB
2. ACB
3. SF6
4. Explain construction and working of Puffer Type SF6 CB

[OR] Explain construction and working of VACUUM CB

COURSE CONTENT DELIVERY:

1. Sources of Fault Power, Illustrate the Phenomena of Short Circuit with the help of a general circuit diagram 01
2. Types of faults & Harmful Effects of short circuit current, Symmetrical Faults on Three Phase Systems 01
3. Importance of calculation of Short Circuit Current, Define Percentage reactance and Base KVA, Meaning of Reactor 01
4. Use of current limiting reactors & their arrangements, List the steps for Symmetrical Fault Calculations 01
5. Simple Problems on Symmetrical Fault Calculations. 01
6. Causes of over voltages, Lighting phenomena &over voltage due to lightning, Types of lightning arresters 01
7. Lightning arresters & surge absorbers & their Construction & principle of operation. 01
8. Meaning of Switchgear , Essential features of Switchgear, List different Switchgear equipment used for switching and interruption of current 01
9. Explain Differences between Indoor type and Outdoor type Switchgear 01
10. Desirable Characteristics of Fuse elements, Types ofFuses, Fuse Element Materials 01
11. Important Terms: Current Rating of Fuse element, Fusing current, Fusing factor, Prospective current, cut off current , Pre Arcing Time, Arcing Time, Breaking Capacity, Total Operating Time. 01
12. HRC fuses -construction, types, working, Merits, demerits and applications 01
13. Arc formation process, methods of arc extinction (HT & LT Method. 01
14. Circuit Breaker rating, Explain the terminologies – Arc-Voltage, arching Time, Pre -Arching Time, Prospective Current, TRV, Recovery Voltage, RRRV, Total Break Time 01
15. Working of Circuit Breaker by Trip Circuit Mechanism, Classification of Circuit Breakers 01
16. Working principle, Construction, Merits, Demerits & Applications of Plain Break Oil CB 01
17. Working principle, Construction, Merits, Demerits & Applications of ACB (Axial blast, cross blast. 01
18. Working principle, Construction, Merits, Demerits & Applications of Puffer Type SF6 CB 01
19. Working principle, Construction, Merits, Demerits & Applications of Non Puffer Type SF6CB 01
20. Working principle, Construction, Merits, Demerits & Applications of VACUUM CB 01
21. Maintenance Schedule of OCB,ACB, SF6 and VCB Circuit Breakers 01
22. Relay definition, required qualities of Protective Relaying, Necessity for Protection 01
23. Primary and Back up protection, Classification of protective Relaying, Important Terms: Pickup current, current setting, P S M, T S M, Time P S M Curve 01
24. Construction and working of Induction type Non-directional over current relay 01
25. Introduction of Static relay, Static Type Over Current Relay, merits and Limitations 01
26. Block diagram and working of Microprocessor based Over Current Relay 01
27. Comparison of Static Relays with Electro-Magnetic Relays and microprocessor based relays 01
28. Differential relay- Principle of operation, sketch and working of Current differential and Voltage balanced Differential relay 01
29. Differential relay- Principle of operation, sketch and working of Voltage balanced Differential relay 01
30. Distance relays: Construction and working of Definite distance Impedance Relay 01
31. Construction and working ofTime-distance Impedance Relay 01
32. Introduction to Numerical relays ,Advantages of Numerical relays and different types 01
33. Listand explain different Testing Methods for Relays 01
34. Types of Protection of Alternators, Explain Abnormalities & List different types of Faults 01
35. Construction and working Differential protection, Construction and working Balanced Earth Fault Protection 01
36. Construction and working Stator Inter Turn Protection 01
37. Types of Protection of Transformers, Explain Abnormalities & List different types of Faults 01
38. Construction and working of Buchholz Relay 01
39. Construction and working of Earth Fault or Leakage Protection Systems for Transformers 01
40. Construction and working of Combined Leakage and Overload Protection 01
41. Construction and working of Circulating Current Scheme for Transformers Protection 01
42. Feeder Protection, Explain Abnormalities & List different types of Faults Time Graded Over Current Protection on transmission line 01
43. Construction and working of Differential Pilot – Wire Protection 01
44. Discuss Basic principle of Distance Protection 01
45. Bus -Bar Protection, Explain Abnormalities & List different types of Faults 01
46. Construction and working of Differential Protection of Bus -Bars 01
47. Explain the indoor and outdoor type substation Identify the various units of substation 01
48. List Testing methods of Circuit Breaker, Explain type test and routine test & maintenance 01
49. List & Explain Testing methods of CT’s & PT’s and Maintenance of Relays 01
50. Introduction, Types &Importance of Neutral Earthing 01
51. Explain Substation Earthing(Solid, Resistance and Reactance Earthing. 01
52. Explain Principle and applications Peterson coil. 01

Model Question Paper:

PART -A

1. List the Harmful Effects of short circuit current 5
2. Explain methods of Reactive power control 5
3. Explain the different methods of arc extinction 5
4. Explain terms: Terms: Current Rating of Fuse element, Fusing current, Fusing factor, Prospective current, cut off current , Pre Arcing Time, Arcing Time, Breaking Capacity, Total Operating Time. 5
5. List different requirements of Protective Relays 5
6. Explain terms: Pickup current, current setting, P S M, T S M, Time P S M Curve 5
1. Explain various Abnormalities occurs in Alternators
2. Explain various Abnormalities occurs in Transformers 5
1. List different types of faults in Transmission lines
2. List different types of faults in Bus – Bars 5
9. Lists the steps in maintenance of Circuit Breakers 5

PART -B

1. A 3phase transmission line operating at 10 kV and having a resistance of 1ohm and reactance of 4Ohm is connected to the generating station bus-bars through 5MVA step up transformer having a reactance of 5%. The bus-bars are supplied by 10 MVA alternators having 10% reactance. Calculate the short-circuit kVA fed at symmetrical fault between phases if it occurs
1. At the load end of transmission line
2. At the high voltage terminal of the transformer

Follow the figure from pdf.

1. List Desirable Characteristics of Fuse elements
2. State Merits and Demerits of HRC fuse 5
1. Explain construction and working of Plain oil OCB ACB
2. State Merits and Demerits of Plain oil OCB 5
1. Explain construction and working ofnon Puffer Type SF6 CB
2. List the maintenance of SF6 CB 5
1. Explain the Necessity for Protection
2. List different types of faults in Transformers 5
1. Explain with block diagram Microprocessor based Over Current Relay
2. List any 4 applications of Microprocessor based Relay 5
1. Explain construction and working of Static Type Over Current Relay
2. Compare Static Relays with Electro-Magnetic Relays 5
1. Explain with a neat sketch construction and working of Differential protection of alternators
2. Explain with a neat sketch construction and working of Earth Fault or Leakage Protection of Transformers 5
1. Explain Time Graded Protection for Radial Feeders 5
2. Explain Differential Protection of Bus -Bars 5
1. Explain Solid Earthing 5
2. Explain Peterson coil 5

For detail syllabus of all other subjects of BE Electrical, C15 scheme do visit Electrical 5th Sem syllabus for C15 scheme.

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