Exam Details
| Subject | Switchgear And Protection | |
| Paper | ||
| Exam / Course | Diploma -VIEP-Electrical Engineering (DELVI)/Advanced Level Certificate Course In Electrical Engineering (ACELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
1. Explain the following terms related to a relay:
Selectivity
Discrimination
Sensitivity
Reliability
2. Explain the construction and operation of an electromagnetic directional relay. Also give the application of over-current and directional relay.
3. Draw a labelled connection diagram of directional relay for 30° and 90° connection.
4. What do you understand by carrier current protection of transmission line Explain the basic apparatus used for power line carrier system.
5. Explain with the help of a diagram Merz-Price protection for a delta-star transformer. Also give the advantage of this protective scheme.
6. Explain the construction and working of a gas actuated relay used in power transformer protection. Where is this type of relay connected in a transformer?
7. Determine the time of operation of a 5 amp, 3 second over-current relay having a current setting of 125% and time setting multiplier of 0·6 connected to supply circuit through a 400/5 current transformer when current during fault flows through the circuit is 4000 amperes. Assume for plug setting a multiplier of value the time of operation is 3·5 seconds.
8. What are the different theories of current interruption Define RRRV. Briefly explain the construction and working of a minimum oil circuit breaker with the help of a neat sketch.
9. Explain the construction and working of a SF6 circuit breaker. Give its advantages and disadvantages.
10. Write short notes on any two of the following:
Current Chopping
Negative Sequence Protection
Bus Bar Protection
Mho Relay Characteristics
Selectivity
Discrimination
Sensitivity
Reliability
2. Explain the construction and operation of an electromagnetic directional relay. Also give the application of over-current and directional relay.
3. Draw a labelled connection diagram of directional relay for 30° and 90° connection.
4. What do you understand by carrier current protection of transmission line Explain the basic apparatus used for power line carrier system.
5. Explain with the help of a diagram Merz-Price protection for a delta-star transformer. Also give the advantage of this protective scheme.
6. Explain the construction and working of a gas actuated relay used in power transformer protection. Where is this type of relay connected in a transformer?
7. Determine the time of operation of a 5 amp, 3 second over-current relay having a current setting of 125% and time setting multiplier of 0·6 connected to supply circuit through a 400/5 current transformer when current during fault flows through the circuit is 4000 amperes. Assume for plug setting a multiplier of value the time of operation is 3·5 seconds.
8. What are the different theories of current interruption Define RRRV. Briefly explain the construction and working of a minimum oil circuit breaker with the help of a neat sketch.
9. Explain the construction and working of a SF6 circuit breaker. Give its advantages and disadvantages.
10. Write short notes on any two of the following:
Current Chopping
Negative Sequence Protection
Bus Bar Protection
Mho Relay Characteristics
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Basics of Electrical Engineering
- C - Programming
- Computer Applications In P.S.
- Control Systems
- Digital Control System
- Digital Control System Design
- Dynamics System Simulation
- Electrical Circuit Theory
- Electrical Engineering Material
- Electrical Installation and System
- E l e c t r i c a l M a c h i n e T h e o r y I I
- Electrical Machines-I
- Electrical Measurements And Instruments
- Electrical Power Transmission and Distribution
- Energy Audit
- Flexible Ac Transmission System
- Industrial Drives and Controls
- Mechatronics
- Power Generation System
- Power Plant Economics And Centering
- Power System Reliability
- Principles of Computer Architecture
- Special Electrical Machines
- Switchgear And Protection
- Utilization Of Electrical Engineering